XPOVIO® (selinexor) Approved for Commercialization in Indonesia, Further Expanding Antengene's Commercial Presence in APAC

Antengene Corporation Limited ("Antengene", SEHK: 6996.HK), a leading innovative, commercial-stage global biopharmaceutical company dedicated to discovering, developing and commercializing first-in-class and/or best-in-class medicines for cancer, today announced that the Indonesia National Agency of Drug and Food Control (BPOM) has approved a New Drug Application (NDA) for XPOVIO® (selinexor) for three indications: (1) In combination with bortezomib and dexamethasone for the treatment of adult patients with multiple myeloma (MM) who have received at least one prior therapy;(2) in combination with dexamethasone for the treatment of adult patients with relapsed or refractory MM (R/R MM) who have received at least four prior therapies and whose disease is refractory to at least two proteasome inhibitors (PIs), at least two immunomodulatory agents (IMiDs), and an anti‐CD38 monoclonal antibody; and (3) as a monotherapy for the treatment of adult patients with relapsed or refractory diffuse large B‐cell lymphoma (R/R DLBCL), not otherwise specified, including DLBCL arising from follicular lymphoma, after at least two lines of systemic therapy who are not eligible for haematopoietic cell transplant.

With a novel mechanism of action, XPOVIO® is the world's first approved orally-available, selective XPO1 inhibitor, which has already been approved in ten countries and regions in APAC, and has been included in the national insurance schemes in five of these markets (the mainland of China, Taiwan market, Australia, Singapore and South Korea).

The ASEAN region, with its steady economic growth and a population exceeding 600 million, has become a market of significant potential for global biomedical development. The accelerating aging population in ASEAN has increased the overall disease burden on patients and local communities, leading to a growing demand for novel therapeutics. Currently, Antengene is actively expanding its presence into APAC markets in efforts to introduce more innovative medicines to the ASEAN region in the future, improving the level of healthcare in these regions and benefiting more patients in need.

While bringing XPOVIO® to more APAC markets, Antengene is also striving to expand the indications of XPOVIO®. Leveraging the drug's novel mechanism of action, Antengene is currently developing multiple combination regimens of XPOVIO® for the treatment of various indications including myelofibrosis (MF) and endometrial cancer.

About XPOVIO® (selinexor)

XPOVIO® is the world's first approved orally-available, selective inhibitor of the nuclear export protein XPO1. It offers a novel mechanism of action, synergistic effects in combination regimens, fast onset of action, and durable responses.

By blocking the nuclear export protein XPO1, XPOVIO® can promote the intranuclear accumulation and activation of tumor suppressor proteins and growth regulating proteins, and down-regulate the levels of multiple oncogenic proteins. XPOVIO® delivers its antitumor effects through three mechanistic pathways: 1) exerting antitumor effects by inducing the intranuclear accumulation of tumor suppressor proteins; 2) reducing the level of oncogenic proteins in the cytoplasm by inducing the intranuclear accumulation of oncogenic mRNAs; 3) restoring hormone sensitivity by activating the glucocorticoid receptors (GR) pathway. To utilize its unique mechanism of actions, XPOVIO® is being evaluated for use in multiple combination regimens in a range of indications. At present, Antengene is conducting multiple clinical studies of XPOVIO® in the mainland of China for the treatment of relapsed/refractory hematologic malignancies and solid tumors (3 of these studies are being jointly conducted by Antengene and Karyopharm Therapeutics Inc. [Nasdaq:KPTI]).

About Antengene

Antengene Corporation Limited ("Antengene", SEHK: 6996.HK) is a leading commercial-stage R&D-driven global biopharmaceutical company focused on the discovery, development, manufacturing and commercialization of innovative first-in-class/best-in-class therapeutics for the treatment of hematologic malignancies and solid tumors, in realizing its vision of "Treating Patients Beyond Borders".

Since 2017, Antengene has built a pipeline of 9 oncology assets at various stages going from clinical to commercial, including 6 with global rights, and 3 with rights for the APAC region. To date, Antengene has obtained 31 investigational new drug (IND) approvals in the U.S. and Asia, and submitted 10 new drug applications (NDAs) in multiple Asia Pacific markets, with the NDA for XPOVIO® (selinexor) already approved in Mainland of China, Taiwan China, Hong Kong China, Macau China, South Korea, Singapore, Malaysia, Thailand, Indonesia and Australia.

Forward-looking statements

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