SCG Cell Therapy Announces U.S FDA Clearance of Investigational New Drug Application for SCG101, SCG's Novel TCR-T Cell Therapy For Hepatitis B-related Liver Cancers

SINGAPORE,July 11,2022 -- Singapore-based SCG Cell Therapy Pte Ltd ("SCG") announced that U.S. Food and Drug Administration (FDA) has clearedthe Investigational New Drug (IND) application for SCG101,an investigational T-cell receptor (TCR) T cell therapy for patients with hepatitis B virus (HBV) related liver cancer. This clearance initiates the advancement of SCG101 Phase 1/2 clinical trials globally.

This announcement follows SCG'sprevious IND approvals from China National Medical Products Administration (NMPA) in March 2022 and Singapore Health Sciences Authority (HSA) in May 2022. This further establishes SCG101 as the first TCR-T cell therapy product approved for clinical trial across the U.S,China and Singapore.

"Clearance of the IND for SCG's leading cell therapy product SCG101 across the United States and Asia is an important milestone for the company," said Frank Wang,Chief Executive Officer of SCG Cell Therapy. "We are eager to start international multicenter clinical trial that utilizes our TCR-T technologies to offer innovative treatment option for patients."

SCG101 is an autologous TCR T cell therapy that can recognize HBV-derived T cell epitope presented on the cell surface by specific major histocompatibility complex (MHC) class I molecules. With the specific HLA typing,SCG101 can redirect T cells specifically against the HBV antigen not only to target and eliminate HBsAg-positive HCC cells but also to eradicate HBV cccDNA (covalently closed circular DNA).

"Our previous preclinical and clinical studies demonstrated that SCG101 has dual antiviral and antitumor activities,which is a profoundly important and exciting clinical proof-of-concept for SCG in cancer drug development," stated Ke Zhang,PhD,Chief Scientific Officer of SCG Cell Therapy. "We believe tumour microenvironment is a majorbarrier to successful cell therapy in solid tumours. Redirecting T cells specifically against HBsAg-positive HCC cells as well as HBV-infected cells could potentially induce immunological cascades altering the tumour microenvironment and offer a path forward to better outcomes for patients."

In June 2022,SCG Cell Therapy presented interim data from an investigator-initiated clinical trial of SCG101 at the International Liver Congress (ILC) 2022,the 57th EASL Annual Meeting. The trial evaluated single-doseSCG101 in patients with advanced HBV-relatedhepatocellular carcinoma (HCC) who had received at least two prior cancer therapies. The data showed significant antiviral activity and tumour control.Two out of three patients observed lesion shrinkage as well as rapid and significant serum HBsAg reduction from a baseline of 1,004.3 IU/mL and 521.6 IU/ML to 23.8 IU/mL and 9.1 IU/mL in just 28 days from SCG101 treatment and further reduced to 14.0 IU/m and 0.3 IU/mL within 60 days from treatment.

About SCG101

SCG101,an autologous T-cell receptor (TCR) T cell therapy,is an investigational cell therapy product that targets specific epitopes of hepatitis B surface antigen (HBsAg). SCG101 incorporates SCG's proprietary technology,which allows for redirecting and engineering endogenous T cells using virus-specific TCRs with high sensitivity and avidity selectively against dysfunctional infected and tumour cells. Preclinical studies of SCG101 demonstrated tumour inhibition and HBV cccDNA eradication. In 2022,SCG101 was granted clinical trial approvals by the U.S Food and Drug Administration (FDA),China National Medical Products Administration (NMPA) and Singapore Health Science Authority (HSA) for the potential treatment of HBV-related HCC. The Phase 1/2 clinical trial evaluating SCG101 is underway.

About Liver Cancer

Hepatocellular carcinoma (HCC) is the most common type of liver cancer. It is estimated that more than 905,000 new cases of liver cancer and more than 830,100 deaths from the disease globally in 2020,making it one of the leading causes of cancer deaths around the world [1]. Chronic hepatitis B virus (HBV) infection accounts for at least 50% of cases of HCC worldwide [2]. HCC is typically diagnosed at an advanced stage and is associated with a poor prognosis. The five-year survival rate of less than 15%.

About SCG Cell Therapy

SCG is a leading biotechnology company focusing on the development of novel immunotherapies for infections and their associated cancers. The company targets the most common cancer-causing infections: helicobacter pylori,human papillomavirus,and hepatitis B,and develops a broad and unique pipeline of T cell therapies,antibodies,and therapeutic vaccines against infections to prevent and cure its associated cancers. Established and headquartered in Singapore,SCG combines regional advantages in Singapore,China and Germany,covering the entire value chain from innovative drug research and discovery,manufacturing,clinical development and commercialization. SCG collaborates with leading scientists and researchers to bring first-in-class and best-in-class medical products/technologies to enhance innovation in medical product development.

For more information about SCG,please visit us at www.scgcell.com

[1]https://www.wcrf.org/cancer-trends/liver-cancer-statistics/

[2]https://pubmed.ncbi.nlm.nih.gov/29052129/#:~:text=Hepatocellular%20carcinoma%20(HCC)%20is%20the,persons%20with%20chronic%20HBV%20infection