Clinical Results of Fully Human BCMA CAR-T for the Treatment of Relapsed/Refractory Multiple Myeloma Co-developed by IASO BIO and Innovent Presented at the 2019 ASCO and EHA Annual Meetings

IASO Biotherapeutics unveils an innovative new CAR-T therapy for
the treatment of relapse/refractory multiple myeloma and the retreatment
of previously infused CAR-T patients

NANJING, China–(BUSINESS WIRE)–IASO Biotherapeutics (IASO BIO), one of the top biotechnology
innovators, announced their potential best-in-class therapy back-to-back
at two of the most prestigious clinical meetings in the worlds of
hematology and oncology, the American Society of Clinical Oncology
(ASCO) Annual Meeting 2019 in Chicago, Illinois, May 31-June 4
[Abstract#8013; Monday, June 3], and the 24^th Congress of the
European Hematological Society (EHA), June 13-16 [Abstract#S827;
Saturday, June 15].

These notable meetings feature the efforts of the brightest minds
driving innovation in hematology and cancer research from around the
globe. With a combined international attendance of more than 50,000,
this year’s meetings focused heavily on the field of immunotherapy,
presenting the latest trends and approaches in immuno-oncology,
including adaptive cell therapies, immune checkpoint inhibitors, CAR-T
therapies and more.

CT103A is an anti-BCMA CAR-T for the treatment of relapsed/refractory
multiple myeloma (R/RMM) co-developed by IASO BIO and Innovent
Biologics, Inc. (Innovent) (HKEX:01801). The data of CT103A presented at
both conferences show impressive efficacy results, persistence and
safety profile and an objective response rate (ORR) of 100%.

In an IIT study conducted by Tongji Hospital of Tongji Medical College,
Huazhong University of Science and Technology, IASO BIO presented
compelling results for efficacy and persistence of a therapy that may
also provide patients, having relapsed from a prior CAR-T, an option for
CAR-T retreatment.

Multiple myeloma is a malignant hematologic cancer with abnormal
proliferation of clonal plasma cells, which has no medical cure so far.
In many countries, myeloma is the second most common blood cancer. The
American Cancer Society estimates that in the United States (U.S.),
about 32,110 new cases will be diagnosed this year. In Europe, more than
48,200 people were diagnosed with multiple myeloma in 2018. Among them,
40 percent of patients are diagnosed with moderate or high-risk multiple
myeloma, and their median survival is less than five years.

As of the data cutoff date of May 22^nd, 2019, the objective
response rate (ORR) was 100% (CR-64%, VGPR-36%) with strong persistence
and high expansion of the CAR-T in vivo. All patients (100%) experienced
CRS. The onset of CRS occurred within 2 to 5 days (median – 2.6) and
resolved within 14 days. Mostly grade 1 and 2, at the low and medium
dosage levels, CRS was routinely managed with Tocilizumab and steroids.
Interestingly, the 12-patient study included 4 patients having
previously relapsed from a prior CAR-T therapy, a murine anti-BCMA CAR-T.

“Relapsed/refractory multiple myeloma (R/RMM) is associated with a poor
prognosis,” said Dr. Chunrui Li of Tongji Hospital of Tongji Medical
College, Huazhong University of Science and Technology. “Many who
receive CAR-T treatments have had their disease come back, and with a
non-human scFv, retreatment may not be an option due to immunogenicity.
With a fully human BCMA scFv, CT103A provides an effective option for
these patients. This data suggests they should not be excluded from the
benefit of future trials.”

About Relapsed/Refractory Multiple Myeloma:

For newly treated patients with multiple myeloma, the common first-line
treatment drugs include proteasome inhibitors, immunoregulatory drugs
and alkane agents. For most patients, the commonly used first-line
treatment can stabilize the patient’s condition for 3-5 years, but a
small number of patients show primary drug resistance at the time of
initial treatment, and the disease cannot be effectively controlled.
Relapse patients are patients who have a reoccurrence after complete
remission of the disease. Refractory patients are patients with primary
drug resistance or the patients who have finished with first-line
treatment and do not achieve remission, or the patients whose disease
progress within 60 days after achieving minimal response. For the
majority of patients with effective treatment, they will inevitably
enter the stage of relapse and refractory after 3-5 years of disease
stabilization. For these patients, the overall effective rate of
existing second-line treatment is about 40% to 70%, with short remission
time.

About CT103A:

CT103A is an innovative therapy co-developed by IASO BIO and Innovent.
Previous studies indicate patients with relapsed/refractory multiple
myeloma (R/RMM) who received high-dose, BCMA-targeting CAR-T cells may
achieve better remission but have worse adverse events. Moreover, once
the disease progresses again, the re-infusion of CAR-T cells is not
effective. To solve this dilemma, CT103A has been developed, A
lentiviral vector containing a CAR structure with a fully human scFv,
CD8a hinger and transmembrane, 4-1BB co-stimulatory and CD3z activation
domains. Based on strict selection and screening, utilizing a
proprietary in-house optimization platform, the construct of the CT103A
CAR-T is potent and persistent.

About Nanjing IASO Biotherapeutics:

Founded in 2017, IASO BIO is a clinical stage biotechnology company
advancing the development of innovative therapies for cancer. IASO BIO
stands out in fierce competition through innovation, a world-class
facility, and an internationally renowned clinical research team. IASO
BIO is dedicated to curing cancer using engineered autologous/allogenic
T cell therapies designed to enhance the immune system’s ability to
recognize and eradicate cancer cells. Currently, IASO BIO is developing
over 10 high-potential, high-end biopharmaceutical products targeting
hematological tumors, solid tumors and virus-associated tumors. For more
information, please visit: www.iasobio.com.

About Innovent:

Inspired by the spirit of “Start with Integrity, Succeed through
Action,” Innovent’s mission is to develop and commercialize high quality
biopharmaceutical products that are affordable to ordinary people.
Established in 2011, Innovent is committed to developing, manufacturing
and commercializing high quality innovative medicines for the treatment
of oncology, autoimmunity and other major diseases. On October 31, 2018,
Innovent was listed on the Main Board of the Stock Exchange of Hong Kong
Limited with the stock code: 01801.HK.

Since it was founded, Innovent has developed a fully integrated platform
which includes R&D, CMC (Chemistry, Manufacturing, and Controls),
clinical development and commercialization capabilities. Leveraging the
platform, the company has built up a robust pipeline of 20 innovative
assets in the fields of oncology, ophthalmology, autoimmunity, and
cardiovascular diseases. Fourteen assets have entered into clinical
development, four have entered Phase 3 clinical trials, three monoclonal
antibodies have their New Drug Application (NDA) under review and two of
them have been granted with priority review status, and one, Tyvyt®
(sintilimab injection), is now approved for relapsed or refractory
classical Hodgkin’s lymphoma (r/r cHL).

Innovent has built an international team of advanced talents in high-end
biological drug development and commercialization, including many
overseas experts. The company has also entered into strategic
collaborations with Eli Lilly and Company, Adimab, Incyte, Hanmi and
other international pharmaceutical companies. Innovent strives to work
with all relevant parties to help advance China’s biopharmaceutical
industry, improve drug availability to ordinary people and enhance the
quality of the patients’ lives. For more information, please visit: www.innoventbio.com.

Contacts

Sharon Y. Sim
SKC, Inc.
[email protected]
415.420.1889