US-FDA approves Senhwa Biosciences phase II IND application of Silmitasertib to treat patients with CAP associated with viral infection

Senhwa Biosciences, Inc., a drug development company focusing on first-in-class therapeutics for oncology, rare diseases, and infectious diseases, announced that US Food and Drug Administration has approved its phase II IND application of Silmitasertib(CX-4945) to treat patients with community-acquired pneumonia (CAP) caused by viral infection. The trial is a phase II multi-centre, randomized-controlled interventional prospective study, and the purpose of this trial is to investigate whether early intervention of Silmitasertib restrains the progression of CAP by inhibiting the elevated cytokine release associated with SARS-CoV-2 and Influenza viruses.

Silmitasertib works by inhibiting CK2 protein kinase, which have implicated in regulation of several signalling pathways that are important for innate immune responses. CK2 modulates inflammatory pathways, including NF-?B, PI3K–Akt–mTOR, and JAK–STAT. Inhibition of CK2 by Silmitasertib diminishes the secretion of IL-6 and MCP-1 (Rosenberger et al.). Silmitasertib treatment also reduces the expression of TNF-a and CCL4 in NiSO4-stimulated MoDCs (Bourayne et al.). “Senhwa regards this phase II as the proof-of-concept study to demonstrate Silmitasertib can be a therapeutic strategy that are not restricted to only a specific viral infection, but applicable to various viruses,” said Jin-Ding Huang, CEO of Senhwa Biosciences, Inc.

The global market for related therapeutic drugs has exceeded a value of over $120.6 billion USD in 2020 and it’s projected to grow at a CAGR of 7.88% and reach more than $339 billion USD by 2030 according to market research.

Prior to this phase II study, Silmitasertib was investigated in two investigator-initiated trials (IIT) in the United States and has showed clinical benefits by accelerating the recovery speed in patients with moderate symptoms of Covid-19.

Silmitasertib is a first-in-class small molecule drug that targets the CK2 protein and acts as a CK2 inhibitor. Clinical studies thus far have shown Silmitasertib is safe and well-tolerated in humans and is easily administered with its oral formulation. Silmitasertib is currently under development through several oncology programs in adults and children with recurrent/advanced or metastatic cancer. To date, three phase I trials and one phase II trial of Silmitasertib in cancer patients have been completed while two other phase I and II studies of Silmitasertib are still ongoing.

The US FDA has granted Silmitasertib Orphan Drug Designation for the treatment of Cholangiocarcinoma in December 2016, Rare Pediatric Disease Designation and Orphan Drug Designation for the treatment of Medulloblastoma in July 2020 and December 2021, respectively. Fast Track Designation was granted in August 2021 for the treatment of recurrent Sonic Hedgehog driven Medulloblastoma.

Senhwa Biosciences, Inc. is a leading clinical-stage company focused on developing first-in-class, next-generation DNA Damage Response therapeutics and seeks to address unmet medical needs in oncology and infectious diseases.

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