The following information should be read in conjunction with our unaudited
condensed consolidated financial statements and the notes thereto included in
this Quarterly Report on Form 10-Q and the audited financial information and the
notes thereto included in our Annual Report on Form 10-K for the year ended
December 31, 2021, which was filed with the Securities and Exchange Commission,
or SEC, on March 25, 2022. This Quarterly Report on Form 10-Q contains
forward-looking statements within the meaning of Section 27A of the Securities
Act of 1933, as amended, or the Securities Act, and Section 21E of the
Securities Exchange Act of 1934, as amended, or the Exchange Act, that involve
significant risks and uncertainties. Our actual results, performance or
experience could differ materially from what is indicated by any forward-looking
statement due to various important factors, risks, uncertainties, assumptions
and other factors including, but not limited to, those identified in this
Quarterly Report on Form 10-Q and those set forth under the section titled "Risk
Factors" in Part II, Item 1A of this Quarterly Report on Form 10-Q and in our
other SEC filings.

Overview

We are an early-stage biotechnology company developing nucleic acid therapies
targeting ribonucleic acid against validated targets to neurological disorders
and hair loss. Our team includes a diverse scientific group with expertise in
nucleic acid chemistry, drug development and neuroscience. Headquartered in
Chicago, Illinois, we conduct our discovery and development efforts in-house
with a dedicated 30,000 square foot facility, including rapid and automated high
throughput nucleic acid synthesis and screening.

Our therapeutic discovery and development efforts are supported by our
proprietary Spherical Nucleic Acid, or SNA, technology. SNAs are nanoscale
constructs consisting of densely packed synthetic nucleic acid sequences that
are radially arranged in three dimensions. We believe the design of our SNAs
gives rise to distinct chemical and biological properties that may provide
advantages over other nucleic acid therapeutics and enable therapeutic activity
outside of the liver. Our platform for therapeutic nucleic acids has
demonstrated potential high potency, broad uptake, and prolonged efficacy in
both in vitro and in vivo neurological models. The basis of our discovery
approach harnesses our expertise in oligonucleotide chemistry for use against
validated targets where we can screen thousands of oligonucleotides efficiently
and identify top candidates in the appropriate cell and live animal models. We
are currently conducting preclinical studies for a non-opioid analgesic directed
against SCN9A (the gene that encodes the protein Nav1.7); undisclosed targets in
Huntington's disease and Angelman syndrome as part of our collaboration with
Ipsen; and undisclosed targets in hair loss disorders as part of our
collaboration with AbbVie.

The table below sets forth the current status of development of our SNA therapeutic candidates.


                    [[Image Removed: xcur-20220630_g1.jpg]]

Operating, financing, and cash flow considerations



Since our inception in 2011, we have devoted substantial resources to the
research and development of SNAs and the protection and enhancement of our
intellectual property. We have no products approved for sale and have primarily
funded our operations through sales of our securities and collaborations.
Through June 30, 2022, we have raised gross proceeds of $206.6 million from the
sale of common stock and preferred stock. We have also received

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$56.0 million in upfront payments from collaborations, including an upfront
payment of $20.0 million we received in August 2021 in connection with our
research collaboration, license, and option agreement with Ipsen, or the Ipsen
Collaboration Agreement, and an upfront payment of $25.0 million we received in
November 2019 in connection with our research collaboration license and option
agreement with AbbVie, or the AbbVie Collaboration Agreement. As of June 30,
2022, our cash, cash equivalents, short-term investments, and restricted cash
were $23.4 million.

Since our inception, we have incurred significant operating losses. As of June
30, 2022, we have generated an accumulated deficit of $204.7 million.
Substantially all of our operating losses resulted from expenses incurred in
connection with our research programs and from general and administrative costs
associated with our operations.

Based on our current operating plans and existing working capital at June 30,
2022, it is uncertain whether our current liquidity is sufficient to fund
operations over the next twelve months from the date of the issuance of the
accompanying unaudited condensed consolidated financial statements. As a result,
there is substantial doubt about our ability to continue as a going concern.
Substantial additional financing will be needed by us to fund our operations. If
we are unable to raise capital, we may be required to delay, reduce the scope of
or eliminate research and development programs, obtain funds through
arrangements with collaborators or others that may require us to relinquish
rights to assets or preclinical programs that we might otherwise seek to develop
independently; or we may need to consider other various strategic alternatives,
including a merger or sale, or be unable to continue operations.

We expect to continue to incur losses for the foreseeable future. Our net losses may fluctuate significantly from quarter to quarter and year to year. We anticipate that our expenses will increase substantially as we:

•advance preclinical development targeting SCN9A in pain to drug candidate selection and IND-enabling studies;

•advance our SNA platform with our current and prospective suitable collaboration partners;

•initiate research and development, preclinical studies and clinical trials for any additional therapeutic candidates that we may pursue in the future;

•advance other therapeutic candidates through preclinical and clinical development;

•increase our research and development activities to enhance our technology platform;

•continue to manufacture increasing quantities of drug substance and drug product material for use in preclinical studies and clinical trials;

•seek regulatory approval for our therapeutic candidates that successfully complete clinical trials;

•maintain, expand and protect our intellectual property portfolio;

•acquire or in-license other approved drugs, drug candidates or technologies;



•hire additional operational, financial and management information systems and
personnel, including personnel to support our product development and planned
future commercialization efforts; and

•incur additional costs associated with operating as a public company.



We have not generated any revenue from commercial drug sales nor do we expect to
generate substantial revenue from product sales unless or until we successfully
complete development and obtain regulatory approval of and commercialize one or
more of our therapeutic candidates. We do not anticipate generating revenue from
drug sales for the next several years, if ever. If we obtain regulatory approval
for any of our therapeutic candidates, we expect to incur significant
commercialization expenses related to product sales, marketing, manufacturing
and distribution. Other sources of revenue could include a combination of
research and development payments, license fees and other upfront payments,
milestone payments, and royalties in connection with our current and any future
collaborations and licenses. Until such time, if ever, that we generate revenue
from whatever source, we expect to finance our cash needs through a combination
of public or private equity offerings, debt financings and research

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collaboration and license agreements. We may be unable to raise capital or enter
into such other arrangements when needed or on favorable terms. Our failure to
raise capital or enter into such other arrangements as and when needed would
have a negative impact on our financial condition and our ability to develop our
therapeutic candidates.

Recent Developments

Nasdaq Listing Requirements Compliance Notice



As previously disclosed on our Current Report on Form 8-K dated June 29, 2022,
on June 29, 2022, we received a notice letter from The Nasdaq Stock Market LLC,
or Nasdaq, stating that we had not regained compliance with the $1.00 per share
minimum bid price requirement pursuant to Nasdaq Listing Rule 5450(a)(1), or the
Bid Price Requirement, during the compliance period and were subject to
delisting. We timely requested an appeal hearing which stayed delisting pending
the decision of a Nasdaq Hearings Panel, or the Panel.

On July 19, 2022, we received a letter, or the Compliance Notice, from the
Office of General Counsel of Nasdaq, informing us that we had regained
compliance with the Bid Price Requirement and that we were in compliance with
all applicable listing standards, and therefore the schedule hearing before the
Panel had been cancelled.

Pursuant to the Compliance Notice, the scheduled hearing before the Panel on
August 11, 2022 was cancelled and our common stock will continue to be listed
and traded on The Nasdaq Capital Market.

Reverse-Stock Split



On June 28, 2022, we filed a Certificate of Amendment to our Amended and
Restated Certificate of Incorporation, or the Amendment, with the Secretary of
State of the State of Delaware to effect a one-for-thirty (1-for-30) reverse
stock split of our outstanding common stock. The Amendment became effective at
5:00 p.m. Eastern Time on June 29, 2022.

The Amendment provides that, at the effective time of the Amendment, every
thirty (30) shares of our issued and outstanding common stock will automatically
be combined into one issued and outstanding share of common stock, without any
change in par value per share. The reverse stock split effected all shares of
our common stock outstanding immediately prior to the effective time of the
Amendment. As a result of the reverse stock split, proportionate adjustments
have been made to the per share exercise price and/or the number of shares
issuable upon the exercise or vesting of all stock options, restricted share
unit award and performance unit award issued by us and outstanding immediately
prior to the effective time of the Amendment, which resulted in a proportionate
decrease in the number of shares of our common stock reserved for issuance upon
exercise or vesting of such stock options, restricted share unit award and
performance unit award, and, in the case of stock options, a proportionate
increase in the exercise price of all such stock options. In addition, the
number of shares reserved for issuance under our equity compensation plans
immediately prior to the effective time of the Amendment was reduced
proportionately.

No fractional shares were issued as a result of the reverse stock split.
Stockholders of record who would otherwise be entitled to receive a fractional
share received a cash payment in lieu thereof. The reverse stock split affected
all stockholders proportionately and did not affect any stockholder's percentage
ownership of our common stock (except to the extent that the reverse stock split
results in any stockholder owning only a fractional share).

Our common stock began trading on The Nasdaq Capital Market on a split-adjusted
basis when the market opened on Thursday, June 30, 2022. The new CUSIP number
for our common stock following the reverse stock split is 30205M 200.
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All information presented in this Quarterly Report on Form 10-Q, unless otherwise indicated herein, assumes a 1-for-30 reverse stock split of our outstanding shares of Common Stock, and unless otherwise indicated, all such amounts and corresponding conversion price or exercise price data set forth herein have been adjusted to give effect to such assumed reverse stock split.

Private Placement



On May 9, 2022, we entered into a securities purchase agreement, or the
Securities Purchase Agreement, with certain accredited investors, or the
Investors, pursuant to which we agreed to issue and sell to the Investors in a
private placement an aggregate of 867,369 shares, or the Shares, of our common
stock, par value $0.0001 per share, or Common Stock, at a purchase price of
$5.81 per share, or the Private Placement. The Private Placement closed on May
18, 2022, or the Closing Date. We received aggregate gross proceeds from the
Private Placement of approximately $5.0 million, before deducting estimated
offering expenses payable by us. We expect the net proceeds from the Private
Placement to be used to support the development of the advancement of our
preclinical program, including the development of its SCN9A product candidate,
as well as other working capital and general corporate purposes. Pursuant to the
Securities Purchase Agreement, in connection with the Private Placement, the
lead investor, CBI USA, Inc., or CBI USA, has the right to nominate a member to
the Board provided such nominee qualifies as an "independent" director under
Nasdaq Listing Rule 5605(a)(2), effective as of the closing date. CBI USA also
has the right, as of the Closing Date, to designate one individual to attend all
meetings of the Board in a nonvoting observer capacity. Also, on May 9, 2022, we
entered into a registration rights agreement, or the Registration Rights
Agreement, with the Investors, pursuant to which we agreed to register the
Shares for resale. Under the Registration Rights Agreement, we agreed to file a
registration statement covering the resale of the Shares by no later than July
18, 2022. On July 11, 2022, we filed a registration statement on Form S-3 with
the SEC for the resale of the Shares and caused the registration statement to
become effective on July 20, 2022.

COVID-19 Business Update



As the global spread of the COVID-19 pandemic continues to affect our economy
and our industry, we continue to monitor closely the developments and continue
to take active measures to protect the health of our employees and their
families, and our communities. Our on-site activities continue with protocols
for safely accessing and working within our facilities. While we continue to
conduct research and development activities, the COVID-19 pandemic has impacted,
and may continue to impact, certain of our early-stage discovery efforts.

Given the global risks and uncertainties associated with COVID-19, our business,
results of operations, and prospects could be materially adversely affected. For
additional information, see "Item 1A. Risk Factors" of this Quarterly Report on
Form 10-Q.

Critical Accounting Policies and Estimates



Our management's discussion and analysis of financial condition and results of
operations is based on our financial statements, which have been prepared in
accordance with GAAP. The preparation of these financial statements requires us
to make estimates and assumptions that affect the reported amounts of assets and
liabilities and the disclosure of contingent assets and liabilities at the date
of the financial statements, as well as the revenue and expenses incurred during
the reported periods. We base our estimates on historical experience and on
various other factors that we believe are reasonable under the circumstances,
the results of which form the basis for making judgments about the carrying
value of assets and liabilities that are not apparent from other sources.
Changes in estimates are reflected in reported results for the period in which
they become known. Actual results may differ from these estimates under
different assumptions or conditions.

Our critical accounting policies require the most significant judgments and
estimates in the preparation of our consolidated financial statements. There
have been no significant changes to our critical accounting policies from those
which were discussed in our Annual Report on Form 10-K for the year ended
December 31, 2021.

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Recently adopted accounting pronouncements

None.

Recent accounting pronouncements not yet adopted

Refer to Note 2, Significant Accounting Policies, of the accompanying unaudited condensed consolidated financial statements for a description of recent accounting pronouncements not yet adopted.

Results of Operations

Comparison of the Three Months Ended June 30, 2022 and 2021

The following table summarizes the results of our operations for the three months ended June 30, 2022 and 2021:



                                                    Three Months Ended
                                                         June 30,
  (dollars in thousands)                           2022           2021                Change
  Revenue:
  Collaboration revenue                         $   2,471      $      79      $ 2,392       3,028  %
  Total revenue                                     2,471             79        2,392       3,028  %
  Operating expenses:
  Research and development expense                  6,749         10,843       (4,094)        (38) %
  General and administrative expense                3,205          3,098          107           3  %
  Total operating expenses                          9,954         13,941       (3,987)        (29) %
  Operating loss                                   (7,483)       (13,862)       6,379         (46) %
  Other income (expense), net:
     Dividend income                                   16              2           14         700  %
     Interest income                                    1             43          (42)        (98) %
     Interest expense                                   -           (450)         450        (100) %
     Other expense, net                                (4)            (2)          (2)        100  %
  Total other income (expense), net                    13           (407)         420        (103) %
  Net loss before provision for income taxes       (7,470)       (14,269)       6,799         (48) %
  Provision for income taxes                            -              -            -           -  %
  Net loss                                      $  (7,470)     $ (14,269)     $ 6,799         (48) %



Revenue

The following table summarizes our revenue earned during the periods indicated:

                                             Three Months Ended
                                                  June 30,
      (dollars in thousands)                   2022              2021             Change
      Collaboration revenue:
      Ipsen Collaboration Agreement    $      1,775             $  -      $ 1,775            n/m
      AbbVie Collaboration Agreement            696               79       

617 781 %


      Total collaboration revenue      $      2,471             $ 79      $

2,392       3,028  %
      Total revenue                    $      2,471             $ 79      $ 2,392       3,028  %


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Collaboration revenue was $2.5 million during the three months ended June 30,
2022, reflecting an increase of $2.4 million, or 3,028%, from collaboration
revenue of $0.1 million for the three months ended June 30, 2021. The increase
in collaboration revenue of $2.4 million is mostly due to revenue related to the
Ipsen Collaboration Agreement of $1.8 million, as well as an increase in revenue
related to the AbbVie Collaboration Agreement of $0.6 million.

Refer to Note 3, Collaborative Research and License Agreements, of the accompanying unaudited condensed consolidated financial statements for more information regarding revenue recognition for the Ipsen Collaboration Agreement and the AbbVie Collaboration Agreement.



We do not expect to generate any product revenue for the foreseeable future.
However, future revenue may include amounts attributable to partnership
activities including, a combination of research and development payments,
license fees and other upfront payments, milestone payments, product sales and
royalties, and reimbursement of certain research and development expenses, in
connection with the Ipsen Collaboration Agreement, AbbVie Collaboration
Agreement, the collaboration agreement with Dermelix LLC, or any future
collaboration and licenses.

Research and development expense

The following table summarizes our research and development expenses incurred during the periods indicated:



                                                    Three Months Ended
                                                         June 30,
(dollars in thousands)                              2022           2021     

Change

Platform and discovery-related expense $ 2,339 $ 2,481

   $   (142)       (6) %
Employee-related expense                             1,997         3,197        (1,200)      (38) %
Clinical development programs expense                1,229         4,202        (2,973)      (71) %
Facilities, depreciation, and other expenses         1,184           963           221        23  %
Total research and development expense          $    6,749      $ 10,843      $ (4,094)      (38) %

Full time employees                                     31            66           (35)



Research and development expense was $6.7 million for the three months ended
June 30, 2022, reflecting a decrease of $4.1 million, or 38%, from research and
development expense of $10.8 million for three months ended June 30, 2021. The
decrease in research and development expense for the three months ended June 30,
2022 of $4.1 million reflects a reduction in headcount and fewer discovery,
preclinical, and clinical program activities resulting from the restructuring
activities that were announced in December 2021. More specifically, the decrease
in research and development expense for the three months ended June 30, 2022 of
$4.1 million was primarily due to a decrease in costs related to our clinical
development programs of $3.0 million, lower employee-related expense of $1.2
million, and lower platform and discovery-related expense of $0.1 million.

The decrease in clinical development programs expense for the three months ended
June 30, 2022 of $3.0 million was primarily due to lower manufacturing and
toxicology study costs in connection with IND-enabling and Phase 1 clinical
trial preparation activities for the XCUR-FXN program, which we indefinitely
suspended in December 2021. In addition, lower clinical trial costs in
connection with our Phase 1b/2 clinical trial for cavrotolimod (AST-008), which
we began to wind down in December 2021, contributed to the decrease in clinical
development program expense as compared to the prior-year period.

The decrease in employee-related expense for the three months ended June 30,
2022 of $1.2 million was due to lower compensation and related costs in
connection with a lower average headcount during the period resulting from the
restructuring activities that were announced in December 2021. These lower costs
in the three months ended June 30, 2022 were partially offset by retention award
expense for current employees.

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The decrease in platform and discovery-related expense for the three months
ended June 30, 2022 of $0.1 million was mostly due to lower costs for materials,
reagents, and supplies in connection with a reduction in headcount and fewer
discovery and preclinical program activities as compared to the prior-year
period, partially offset by an increase in costs for in vivo study activities
with contract research organizations related to our SCN9A pain program.

The increase in facilities, depreciation, and other expenses for the three months ended June 30, 2022 of $0.2 million was primarily due to higher variable lease costs in the current-year period.

In connection with the restructuring activities announced in December 2021 and based on our current operating plan, we expect our research and development expenses to decrease by approximately 35-40% during 2022 as compared to 2021.

General and administrative expense



                                            Three Months Ended
                                                 June 30,
(dollars in thousands)                       2022            2021           

Change

General and administrative expense $ 3,205 $ 3,098 107 3 % Full time employees

                             8               12         (4)



General and administrative expense was $3.2 million for the three months ended
June 30, 2022, representing an increase of $0.1 million, or 3%, from $3.1
million for the three months ended June 30, 2021. The increase for the three
months ended June 30, 2022 was mostly due to higher legal costs and retention
award expense for current employees, partially offset by lower compensation and
related costs in connection with a lower average headcount during the period
resulting from the restructuring activities that were announced in December
2021, as well as lower costs for consulting, investor relations, and board fees.

Interest expense



The decrease in interest expense of $0.5 million for the three months ended June
30, 2022 is in connection with the repayment in full of all outstanding
indebtedness and other obligations under the MidCap Credit Agreement (as defined
below) on March 15, 2022.

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Comparison of the Six Months Ended June 30, 2022 and 2021

The following table summarizes the results of our operations for the six months ended June 30, 2022 and 2021:



                                                     Six Months Ended
                                                         June 30,
  (dollars in thousands)                           2022           2021                Change
  Revenue:
  Collaboration revenue                         $   5,036      $   1,076      $  3,960         368  %
  Total revenue                                     5,036          1,076         3,960         368  %
  Operating expenses:
  Research and development expense                 13,889         21,105        (7,216)        (34) %
  General and administrative expense                6,367          5,990           377           6  %
  Total operating expenses                         20,256         27,095        (6,839)        (25) %
  Operating loss                                  (15,220)       (26,019)       10,799         (42) %
  Other (expense) income, net:
     Dividend income                                   18              3            15         500  %
     Interest income                                    3            131          (128)        (98) %
     Interest expense                                (595)          (859)          264         (31) %
     Other expense, net                               (24)            (2)          (22)      1,100  %
  Total other expense, net                           (598)          (727)          129         (18) %
  Net loss before provision for income taxes      (15,818)       (26,746)       10,928         (41) %
  Provision for income taxes                            -              -             -           -  %
  Net loss                                      $ (15,818)     $ (26,746)     $ 10,928         (41) %



Revenue

The following table summarizes our revenue earned during the periods indicated:



                                                Six Months Ended
                                                    June 30,
           (dollars in thousands)              2022          2021              Change
           Collaboration revenue:
           Ipsen Collaboration Agreement    $   3,854      $     -      $ 3,854          n/m
           AbbVie Collaboration Agreement       1,182        1,076          106        10  %
           Total collaboration revenue      $   5,036      $ 1,076      $ 3,960       368  %
           Total revenue                    $   5,036      $ 1,076      $ 3,960       368  %



Collaboration revenue was $5.0 million during the six months ended June 30,
2022, reflecting an increase of $4.0 million, or 368%, from collaboration
revenue of $1.1 million for the six months ended June 30, 2021. The increase in
collaboration revenue of $4.0 million is mostly due to revenue related to the
Ipsen Collaboration Agreement of $3.9 million, as well as an increase in revenue
related to the AbbVie Collaboration Agreement of $0.1 million.

Refer to Note 3, Collaborative Research and License Agreements, of the accompanying unaudited condensed consolidated financial statements for more information regarding revenue recognition for the Ipsen Collaboration Agreement and the AbbVie Collaboration Agreement.


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We do not expect to generate any product revenue for the foreseeable future.
However, future revenue may include amounts attributable to partnership
activities including, a combination of research and development payments,
license fees and other upfront payments, milestone payments, product sales and
royalties, and reimbursement of certain research and development expenses, in
connection with the Ipsen Collaboration Agreement, AbbVie Collaboration
Agreement, the collaboration agreement with Dermelix LLC, or any future
collaboration and licenses.

Research and development expense

The following table summarizes our research and development expenses incurred during the periods indicated:



                                                    Six Months Ended
                                                        June 30,
(dollars in thousands)                             2022          2021       

Change

Platform and discovery-related expense $ 4,484 $ 6,286 $ (1,802) (29) % Employee-related expense

                           4,300         5,960        (1,660)      (28) %
Clinical development programs expense              2,855         6,805        (3,950)      (58) %
Facilities, depreciation, and other expenses       2,250         2,054      

196 10 % Total research and development expense $ 13,889 $ 21,105 $ (7,216) (34) %



Full time employees                                   31            66           (35)



Research and development expense was $13.9 million for the six months ended June
30, 2022, reflecting a decrease of $7.2 million, or 34%, from research and
development expense of $21.1 million for six months ended June 30, 2021. The
decrease in research and development expense for the six months ended June 30,
2022 of $7.2 million reflects a reduction in headcount and fewer discovery,
preclinical, and clinical program activities resulting from the restructuring
activities that were announced in December 2021. More specifically, the decrease
in research and development expense for the six months ended June 30, 2022 of
$7.2 million was primarily due to a decrease in costs related to our clinical
development programs of $4.0 million, lower platform and discovery-related
expense of $1.8 million, and lower employee-related expense of $1.7 million.

The decrease in clinical development programs expense for the six months ended
June 30, 2022 of $4.0 million was primarily due to lower manufacturing and
toxicology study costs in connection with IND-enabling and Phase 1 clinical
trial preparation activities for the XCUR-FXN program which we indefinitely
suspended in December 2021. In addition, lower clinical trial costs in
connection with our Phase 1b/2 clinical trial for cavrotolimod (AST-008), which
we began to wind down in December 2021, contributed to the decrease in clinical
development program expense as compared to the prior-year period.

The decrease in platform and discovery-related expense for the six months ended
June 30, 2022 of $1.8 million was mostly due to lower costs for materials,
reagents, and supplies in connection with a reduction in headcount and fewer
discovery and preclinical program activities, as well as lower intellectual
property costs, as compared to the prior-year period. This decrease was
partially offset by an increase in costs for in vivo study activities with
contract research organizations related to our SCN9A pain program.

The decrease in employee-related expense for the six months ended June 30, 2022
of $1.7 million was due to lower compensation and related costs in connection
with a lower average headcount during the period resulting from the
restructuring activities that were announced in December 2021. These lower costs
in the six months ended June 30, 2022 were partially offset by retention award
expense for current employees.

The increase in facilities, depreciation, and other expenses for the six months
ended June 30, 2022 of $0.2 million was primarily due to higher variable lease
costs in the current-year period.

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In connection with the restructuring activities announced in December 2021 and based on our current operating plan, we expect our research and development expenses to decrease by approximately 35-40% during 2022 as compared to 2021.

General and administrative expense



                                           Six Months Ended
                                               June 30,
(dollars in thousands)                    2022          2021            

Change

General and administrative expense $ 6,367 $ 5,990 377


   6  %
Full time employees                            8           12         (4)



General and administrative expense was $6.4 million for the six months ended
June 30, 2022, representing an increase of $0.4 million, or 6%, from $6.0
million for the six months ended June 30, 2021. The increase for the six months
ended June 30, 2022 was mostly due to higher legal costs and retention award
expense for current employees, partially offset by lower compensation and
related costs in connection with a lower average headcount during the period
resulting from the restructuring activities that were announced in December
2021, as well as lower costs for investor relations, board fees, and consulting
costs.

Interest expense

The decrease in interest expense of $0.3 million for the six months ended June
30, 2022 was due to the effects of a lower average debt balance during the six
months ended June 30, 2022 as compared to the prior-year period, partially
offset by the acceleration of unamortized debt discount and issuance costs in
the current year period in connection with the repayment in full of all
outstanding indebtedness and other obligations under the MidCap Credit Agreement
(as defined below) on March 15, 2022.

Liquidity and Capital Resources



Since our inception, we have incurred significant operating losses. We have
generated limited revenue to date from our collaboration agreements. We have not
yet commercialized any of our product candidates, which are in various phases of
preclinical development and clinical trials; and we do not expect to generate
revenue from sales of any product for several years, if at all. We have funded
our operations to date with proceeds received from equity financings and
payments received in connection with collaboration agreements.

As of June 30, 2022, our cash, cash equivalents, short-term investments, and
restricted cash were $23.4 million as compared to $48.3 million as of December
31, 2021. To date, we have funded our operations primarily with proceeds
received from equity financings and to a lesser extent, payments received in
connection with collaboration agreements. We have generated limited revenue to
date from our collaboration agreements. We have no products approved for
commercial sale and have not generated any product revenues from product sales
to date, and we do not expect to generate revenue from sales of any product for
several years, if at all.

We have incurred significant operating losses since inception. We incurred net
losses of approximately $15.8 million and $26.7 million for the six months ended
June 30, 2022 and 2021, respectively. As of June 30, 2022, we have generated an
accumulated deficit of $204.7 million since inception and expect to incur
significant expenses and negative cash flows for the foreseeable future.

Based on our current operating plans and existing working capital at June 30,
2022, it is uncertain whether our current liquidity is sufficient to fund
operations over the next twelve months from the date of the issuance of the
accompanying unaudited condensed consolidated financial statements. As a result,
there is substantial doubt about our ability to continue as a going concern.
Substantial additional financing will be needed by us to fund our operations. If
we are unable to raise capital, we may be required to delay, reduce the scope of
or eliminate research and development programs, or obtain funds through
arrangements with collaborators or others that may require us to relinquish
rights to assets or preclinical programs that we might otherwise seek to develop
independently.

See "-Funding Requirements" below for additional information on our future capital needs.


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MidCap Facility

On March 15, 2022, we repaid in full all outstanding indebtedness and other
obligations under our Credit and Security Agreement, dated as of September 25,
2020, as amended on October 21, 2020, July 30, 2021, September 30, 2021, and
December 10, 2021, with MidCap Financial Trust, as agent, and the lenders party
thereto from time to time, or the MidCap Credit Agreement, and the other
Financing Documents (as defined in the MidCap Credit Agreement), including but
not limited to the outstanding principal balance of $7.5 million and an exit fee
of approximately $0.5 million, and terminated all obligations thereunder (other
than with respect to any obligations that are expressly specified to survive the
termination).

Private Placement

In May 2022, we entered into a securities purchase agreement with several
accredited investors, pursuant to which we issued and sold shares of common
stock for estimated gross proceeds of approximately $5 million, before deducting
transaction-related expenses payable by us. We intend to use the net proceeds
from this offering to support the development of the advancement of our
preclinical program, including the development of its SCN9A product candidate,
as well as other working capital and general corporate purposes.

Cash Flows



The following table shows a summary of our cash flows for the six months ended
June 30, 2022 and 2021:

                                                                             Six Months Ended
                                                                                 June 30,
(in thousands)                                                           2022                 2021
                                                                                (unaudited)
Net cash used in operating activities                               $   (21,834)         $   (25,885)
Net cash provided by investing activities                                 3,491               34,533
Net cash (used in) provided by financing activities                      (3,103)                 677
   Net (decrease) increase in cash, cash equivalents, and
restricted cash                                                     $   (21,446)         $     9,325



Operating activities

Net cash used in operating activities was $21.8 million and $25.9 million for
the six months ended June 30, 2022 and 2021, respectively. The decrease in cash
used in operating activities for the six months ended June 30, 2022 of $4.1
million was primarily due to a decrease in cash used for working capital.

Investing activities



Net cash provided by investing activities was $3.5 million and $34.5 million for
the six months ended June 30, 2022 and 2021, respectively. The decrease in cash
provided by investing activities of $31.0 million was primarily due to a
decrease in proceeds from the maturity, net of purchases, of available-for-sale
securities.

Financing activities

Net cash used in financing activities of $3.1 million for six months ended June
30, 2022 is due to the repayment in full of all outstanding indebtedness and
other obligations under the MidCap Credit Agreement, partially offset by net
proceeds of approximately $4.9 million received in connection with the May 2022
private placement transaction.

Net cash provided by financing activities of $0.7 million for the six months ended June 30, 2021 was due to proceeds from the exercise of common stock options.

Funding Requirements



We expect our expenses to increase as we continue our ongoing activities,
particularly as we continue our research and development, initiate preclinical
studies or clinical trials, and seek marketing approval for our current and any
of our future product candidates. In addition, if we obtain marketing approval
for any of our current or our

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future product candidates, we expect to incur significant commercialization
expenses related to product sales, marketing, manufacturing and distribution,
which costs we may seek to offset through entry into collaboration agreements
with third parties. In addition, our losses from operations may fluctuate
significantly from quarter-to-quarter and year-to-year, depending on the timing
and expenditures of our preclinical studies and our research and development
activities. Accordingly, we will need to obtain substantial additional funding
in connection with our continuing operations. If we are unable to raise capital
when needed or on acceptable terms, we would be forced to delay, reduce or
eliminate our research and development programs or future commercialization
efforts; consider other various strategic alternatives, including a merger or
sale; or cease operations.

We believe that our existing cash and cash equivalents will enable us to fund
our operating expenses and capital expenditure requirements early into the first
quarter of 2023. However, we have based this estimate on assumptions that may
prove to be wrong, and we may use our available capital resources sooner than we
currently expect. Our future capital requirements are difficult to forecast and
will depend on many factors, including:

•the terms and timing of any other collaboration, licensing and other arrangements that we may establish;

•the initiation, progress, timing and completion of preclinical studies and clinical trials for our potential therapeutic candidates;

•the effects of health epidemics, including the ongoing COVID-19 pandemic, on our operations or the business or operations of our contract research organizations, or CROs, or other third parties with whom we conduct business;

•the number and characteristics of therapeutic candidates that we pursue;

•the progress, costs and results of our preclinical studies;

•the outcome, timing and cost of regulatory approvals;

•delays that may be caused by changing regulatory requirements;

•the cost and timing of hiring new employees to support our growth;

•unknown legal, administrative, regulatory, accounting, and information technology costs as well as additional costs associated with operating as a public company;

•the costs involved in filing and prosecuting patent applications and enforcing and defending patent claims;

•the costs of filing and prosecuting intellectual property rights and enforcing and defending any intellectual property-related claims;

•the costs and timing of procuring clinical and commercial supplies of our therapeutic candidates;

•the extent to which we acquire or in-license other therapeutic candidates and technologies; and

•the extent to which we acquire or invest in other businesses, therapeutic candidates or technologies.



Until such time, if ever, as we can generate substantial product revenue, we
expect to finance our cash needs through a combination of equity offerings, debt
financings, collaborations, and distribution or licensing arrangements with
third parties. To the extent that we raise additional capital through the sale
of equity or convertible debt securities, the ownership interest of our
stockholders may be materially diluted, and the terms of such securities could
include liquidation or other preferences that adversely affect the rights of our
stockholders. Debt financing and preferred equity financing, if available, may
involve agreements that include restrictive

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covenants that limit our ability to take specified actions, such as incurring
additional debt, making capital expenditures or declaring dividends. Further,
the global financial markets have experienced significant disruptions over the
past couple years due to the COVID-19 pandemic and the ongoing conflict between
Russia and Ukraine. Any further disruption or slowdown in the global financial
markets and economy may negatively affect our ability to raise funding through
equity or debt financings on attractive terms or at all, which could in the
future negatively affect our operations.

If we raise funds through collaborations or marketing, distribution or licensing
arrangements with third parties, we may have to relinquish valuable rights to
our technologies, future revenue streams, research programs or product
candidates or grant licenses on terms that may not be favorable to us. If we are
unable to raise additional funds when needed, we may be required to delay,
limit, reduce or terminate our research and development programs, product
development or future commercialization efforts or grant rights to develop and
market product candidates that we would otherwise prefer to develop and market
ourselves.

Going Concern

In accordance with Accounting Standards Codification 205-40, Going Concern, we
have evaluated whether there are conditions and events, considered in the
aggregate, that raise substantial doubt about our ability to continue as a going
concern within one year after the date that the unaudited condensed consolidated
financial statements are issued. In the absence of a significant source of
recurring revenue, our continued viability is dependent on our ability to
continue to raise additional capital to finance our operations. Substantial
additional financing will be needed by us to fund our operations. Changes in our
business strategy, our operating plans, our existing and anticipated working
capital needs, increased expenses, or other events will also affect our ability
to continue as a going concern. If we are unable to obtain additional funding,
we may be forced to delay, reduce or eliminate some or all of our research and
development programs, product portfolio expansion or commercialization efforts,
which could adversely affect our business prospects, or we may be unable to
continue operations.

Contractual Obligations and Commitments

There have been no material changes to our contractual obligations and commitments from those described in our Annual Report on Form 10-K for the year ended December 31, 2021.

Off-balance Sheet Arrangements



We did not have during the periods presented, and we do not currently have, any
off-balance sheet arrangements, as defined in the rules and regulations of the
SEC.


JOBS Act

We are an emerging growth company, as defined in the Jumpstart Our Business
Startups Act of 2012, or the JOBS Act. Under the JOBS Act, an emerging growth
company can take advantage of an extended transition period for complying with
new or revised accounting standards. Thus, an emerging growth company can delay
the adoption of certain accounting standards until those standards would
otherwise apply to private companies. We have irrevocably elected not to avail
ourselves of this extended transition period and, as a result, we will adopt new
or revised accounting standards on the relevant dates on which adoption of such
standards is required for other public companies.

In addition, as an emerging growth company, we will not be required to provide
an auditor's attestation report on our internal control over financial reporting
in future annual reports on Form 10-K as otherwise required by Section 404(b) of
the Sarbanes-Oxley Act.

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