Jacobio Pharma Announces 2022 Annual Results

On March 22, 2023 Jacobio Pharma (1167.HK) reported its 2022 annual results (Press release, Jacobio Pharmaceuticals, MAR 22, 2023, View Source [SID1234629177]). R&D investment was RMB530 million, showing an increase of 26% compared with 2021. The revenue was RMB95.7 million, which was generated from an out-licensing deal. Jacobio Pharma also announced its recent business progress and expected milestones.

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Dr. Wang Yinxiang, Chairman and CEO of Jacobio Pharma, said: "Jacobio’s business made satisfying progress in 2022, although all biotechnology companies had to deal with challenges created by a bleak macroeconomic environment. We continue to accelerate clinical projects and expand pipelines through in-house R&D. The previous hard work is about to enter the harvest period. Next, we will focus on the two major R&D areas of targeted therapy and iADC, and further implement the strategy of ‘aiming the global market and the key projects are among the top three in the world’."

Development of core clinical stage products

KRAS G12C inhibitor Glecirasib (JAB-21822)

Monotherapies

– The pivotal trial in patients with NSCLC harboring KRAS G12C mutation was approved by the CDE in September 2022. The NDA application is expected to be submitted in 2023 Q4.

– In December 2022, Glecirasib has been granted BTD (Breakthrough Designation) for the second line and above treatment of advanced or metastatic NSCLC patients with KRAS G12C mutation by the CDE.

– Jacobio has received the IND approval of Glecirasib monotherapy for a Phase I/IIa trial in first line NSCLC patients who have KRAS G12C and STK-11 co-mutation and the first patient was dosed in August 2022.

– In patients with CRC, PDAC and other solid tumors treated with Glecirasib monotherapy, promising efficacy signals were observed. The potential global development plan in other solid tumors will be discussed with China and U.S. regulatory authorities.

In combination with EGFR mAb

– In China, the enrollment of the Phase I/IIa trial of Glecirasib in combination with an anti-EGFR antibody cetuximab in patients with CRC was completed in February 2023. Pivotal trial is expected to be initiated in 2023 Q4 in China.

– In October 2022, Jacobio has entered into a clinical trial collaboration agreement with Merck on clinical study of Glecirasib in combination with Merck’s Erbitux (cetuximab). Merck will provide cetuximab for clinical trials in China and Europe under the collaboration agreement.

SHP2 inhibitors: JAB-3312 & JAB-3068

In combination with KRAS G12C inhibitor

– In China, the Phase I/IIa clinical trial of JAB-3312 in combination with our KRAS G12C inhibitor Glecirasib to treat KRAS G12C naïve and resistant patients is actively recruiting.

– Jacobio has completed the global first dose of Phase II clinical trial for the combination of JAB-3312 and a KRAS G12C inhibitor Sotorasib.

– The results of JAB-3312 in combination with Glecirasib in pre-clinical cancer models were presented in a poster session in 2022 ESMO (Free ESMO Whitepaper) Asia Congress.

Development of other products

– JAB-8263 (BET inhibitor): The Phase I dose escalation portion in solid tumors and hematological malignancies is ongoing in the U.S. and China simultaneously. RP2D is expected to be determined in the second half of 2023.

– JAB-2485 (Aurora A inhibitor): In China, the IND application for a Phase I/IIa trial was approved by the CDE in October 2022. The first patient was dosed in January 2023 in the U.S. This is the first global trial fully managed by Jacobio’s internal clinical team, which demonstrates our global clinical development capabilities.

– JAB-BX102 (CD73 mAb): The Phase I/IIa dose escalation or expansion trial for JAB-BX102 in advanced solid tumors was initiated in September 2022. RP2D is expected to be determined in the second half of 2024. Jacobio has entered into a clinical collaboration with Merck & Co., Inc., Rahway, NJ, USA to evaluate the combination of Jacobio’s CD73 mAb JAB-BX102 in combination with Merck & Co., Inc., Rahway, NJ, USA’s anti-PD-1 therapy, KEYTRUDA (pembrolizumab).

– JAB-24114 (GUE inhibitor): The IND application was approved by China CDE in March 2023.

– Jacobio has submitted the IND applications of JAB-BX300 (LIF mAb) to the NMPA in January 2023.

– The IND applications of JAB-23400 (KRASmulti inhibitor), JAB-30300 (P53 Y220C corrector) and JAB-26766 (PARP7 inhibitor) will be submitted this year.

– Candidate of JAB-X1800, Jacobio’s in-house CD73-STING iADC, was nominated in the first quarter of 2023.

Data publication plan in 2023

– AACR (Free AACR Whitepaper) 2023 (accepted): The preclinical studies of KRASmulti inhibitor JAB-23425, CD73-STING iADC JAB-X1800, and Aurora kinase A inhibitor JAB-2485.

– ASCO (Free ASCO Whitepaper) 2023 (submitted): The clinical data of Glecirasib in combination with Cetuximab in patients with CRC.

– ESMO (Free ESMO Whitepaper) 2023 (planed): The clinical data of SHP2 inhibitor JAB-3312 in combination with Glecirasib.

– 2023 H2-2024 H1 (planed): Glecirasib monotherapy in PDAC and other solid tumors – expect to read out preliminary data for this study.

In 2022, Jacobio owned 280 patents or patent applications that are filed globally, the number increased 60% compared with 2021. The new R&D headquarters in Beijing will be officially used in May 2023, with a total area of 22,000 square meters. In March 2023, Jacobio was selected as the first batch of transferred Hong Kong Listed company under the Shanghai-Hong Kong Stock connect.

Jacobio is able to continuously invest in its pipelines with cash reserve. As of December 31, 2022, Jacobio has 1.3 billion yuan cash and cash equivalent. In February 2023, Jacobio raised HKD159 million through public placing.

Conference Call Information

Jacobio Pharma will hold a live conference call at 9:00 AM March 23 2023 Beijing time. Participants please register in advance through View Source

Ascentage Pharma Announces 2022 Annual Results Including Strong Sales of Olverembatinib and Steady Progress in Transition Towards Biopharma

On March 22, 2023 Ascentage Pharma (6855.HK), a global biopharmaceutical company engaged in developing novel therapies for cancers, chronic hepatitis B (CHB), and age-related diseases, reported its annual results for the full year 2022 (Press release, Ascentage Pharma, MAR 22, 2023, View Source [SID1234629176]). During the reporting period, the company upheld the concept of original innovation and global innovation, and achieved multiple milestones in commercialization, clinical development, and corporate development. The pinnacle of these achievements was the inclusion of olverembatinib (Ascentage Pharma’s first approved product and a drug designated a National Major New Drug Discovery and Manufacturing Program), into the latest National Reimbursement Drug List (NRDL) in January 2023. This inclusion bolstered the drug’s accessibility to patients so significant growth for future sales can be expected.

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In 2022, Ascentage Pharma formally opened the chapter on commercialization, having achieved robust growth in overall performance and strong sales of olverembatinib that underpinned the drug’s enormous potential. During the reporting period, the company’s total revenue grew by 652% from the year before to RMB210 million, most of which was attributable to product sales and commercial partnerships. Since its approval till December 31, 2022, olverembatinib realized an accumulated invoiced sales revenue amount of RMB182 million (audited, inclusive of value-added tax), contributing to the company’s steadily improved cash flow that reached RMB1,500 million in cash and bank balances as of December 31, 2022. In January 2023, Ascentage Pharma successfully completed a follow on offering that increased its total cash balance to RMB1,880 million (as of the reporting day).

The commercialization of olverembatinib boosted by the inclusion into NRDL while making rapid progress with global clinical development programs

As the first and only approved third-generation BCR-ABL inhibitor in China and a drug that was designated a National Major New Drug Discovery and Manufacturing Program, olverembatinib showed its clinical value by fulfilling an urgent clinical gap in patients with T315I-mutant chronic myeloid leukemia (CML) in China. Since its approval till December 31, 2022, olverembatinib generated an accumulated invoiced revenue amount of RMB182 million (audited, inclusive of value-added tax). In January 2023, as a high-profile China-developed innovative drug, olverembatinib was included into the latest NDRL, which is a milestone that drastically improved the drug’s accessibility and affordability to patients.

Ascentage Pharma continuously accelerated the commercialization of olverembatinib. To date, the company has built a commercial team possessing deep expertise in hematology. As a result of the close partnership with Innovent Biologics in commercializing and promoting olverembatinib in the oncology field in China, olverembatinib is now available in 177 direct-to-patient (DTP) pharmacies and over 800 hospitals through 117 distributors across the country. During the same period, olverembatinib was included into the guidelines of the Chinese Society of Clinical Oncology (CSCO) and China Anti-Cancer Association (CACA) to better guide the growing clinical adoption of the drug.

To bring olverembatinib to more patients in need, Ascentage Pharma is accelerating the launch of olverembatinib under a potential full regulatory approval. The Center for Drug Evaluation (CDE) of China National Medical Products Administration (NMPA) has accepted and granted Priority Review status to a New Drug Application (NDA) for the full approval of olverembatinib in patients with chronic-phase CML (CML-CP) who are resistant and/or intolerant of first- and second-generation tyrosine kinase inhibitors (TKIs). The potential approval of this NDA will allow a broader population of patients with CML to benefit from olverembatinib.

Meanwhile, olverembatinib continued to gather widespread interest from the global research community and demonstrate its clinical potential, with results from China studies selected for two oral presentations at the 2022 American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting. 2022 was the fifth consecutive year during which clinical results of olverembatinib were selected for oral presentations at the ASH (Free ASH Whitepaper) Annual Meeting, and results presented at the 2022 ASH (Free ASH Whitepaper) Annual Meeting further validated the drug’s long-term efficacy and safety, as well as its therapeutic potential for the treatment of CML. In addition, the company also released the first dataset from a US study of olverembatinib in another oral presentation at the ASH (Free ASH Whitepaper) Annual Meeting. These data show that olverembatinib can potentially overcome the drug resistance to ponatinib and has promising activity in patients with refractory CML and Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL).

Steadfastly committed to global innovation with an industry-leading differentiated pipeline

In 2022, Ascentage Pharma continued to expand its innovative efforts, with the research and development expenses for the year amounted to around RMB740 million. As a result of the company’s expedited global clinical development programs, Ascentage Pharma now has 9 clinical-stage novel small molecule drugs and over 40 Phase I/II clinical studies ongoing in China, the US, Australia, Europe, and Canada. Pursuing its vision for original and global innovation, Ascentage Pharma was awarded 2 Fast-Track Designations, 2 Rare Pediatric Disease Designations, and 16 Orphan Drug Designations from the U.S. Food and Drug Administration (FDA), and 1 Orphan Drug Designation from the European Commission, setting a record in the number of designations granted to any Chinese biopharmaceutical company and is a manifestation of the company’s capabilities in global innovation.

Through its planned and committed effort, Ascentage Pharma has built a large portfolio of global intellectual property rights. As of December 31, 2022, the company holds 235 issued patents and more than 600 patent applications globally, among which 171 patents were issued overseas.

During the reporting period, Ascentage Pharma rapidly advanced its clinical development programs, having built a rich and diverse pipeline targeting hematologic malignancies as well as a promising portfolio in non-hematologic indications. In addition to olverembatinib, the drug that filled an urgent treatment gap in drug-resistant CML, the company also made considerable progress with its Bcl-2 inhibitor lisaftoclax (APG-2575), another key drug candidate in the company’s apoptosis-targeted pipeline. In 2022, there were 19 clinical studies of lisaftoclax ongoing globally, including a pivotal Phase II study in relapsed/refractory chronic lymphocytic leukemia or small lymphocytic lymphoma (r/r CLL/SLL) that made lisaftoclax the first Bcl-2 inhibitor with clear clinical activity to have entered a pivotal study in China and the second anywhere globally. Moreover, following the recent IND approvals for lisaftoclax in China, the drug is poised to enter a number of combination studies including one evaluating lisaftoclax in combination with the MDM2-p53 inhibitor alrizomadlin (APG-115), another lead asset in the company’s apoptosis-targeted pipeline.

Another one of Ascentage Pharma’s high-potential assets, the first China-developed novel inhibitor of the embryonic ectoderm development (EED) protein APG-5918, also entered clinical development in 2022. The drug is currently being evaluated in clinical studies in advanced solid tumors and hematologic malignancies in both China and the US, an achievement of Ascentage Pharma’s effort to simultaneously advance a clinical program in the two countries. Meanwhile, APG-5918 will soon enter its first clinical study in non-oncologic diseases, with the IND for anemia diseases already approved by the CDE in China.

Elevated leadership in chosen areas with key assets garnering growing interest from the global research community

As an industry leader focused on original innovation and the development of novel drugs targeting the apoptotic pathway, Ascentage Pharma has frequently presented results from multiple clinical programs that received widespread interest at major international congresses. This is a testament to the company’s robust capabilities in oncologic research and clinical development, as well as the first-in-class and best-in-class potential of its key assets.

Lisaftoclax is the first Bcl-2 selective inhibitor with clear clinical activity to have entered a pivotal study in China and the second globally. Results announced in an oral presentation at the 2022 ASH (Free ASH Whitepaper) Annual Meeting showed the strong clinical potential of lisaftoclax, either as a monotherapy or in combinations, in the treatment of R/R CLL/SLL, demonstrating an objective response rate (ORR) of 98% in combination with a Bruton’s tyrosine kinase inhibitor (BTKi). In addition, results from a study of lisaftoclax in Chinese patients with relapsed/refractory non-Hodgkin lymphoma (r/r NHL) were released at the 2022 European Hematology Association (EHA) (Free EHA Whitepaper) Annual Meeting. These results showed an ORR of 87.5% which once again validated the drug’s global best-in-class potential.

Furthermore, the clinical results of the company’s other investigational assets, including the MDM2-p53 inhibitor, alrizomadlin; FAK/ALK/ROS1 TKI, APG-2449; IAP antagonist, APG-1387; and Bcl-2/Bcl-xL inhibitor, APG-1252, were released at prominent international congresses and in renowned scientific journals, winning the company broad recognition for its innovation and clinical development capabilities.

Accelerated transformation into an innovative biopharma with expanding presence in global markets

In 2022, Ascentage Pharma achieved many important milestones, having obtained a Drug Manufacturing License (Certificate A) that allowed it to commence operations at its Global Manufacturing Center where the company will implement stringent quality management in compliant with the cGMP standards of China and western markets. This will enable the company to produce proprietary medicines with global intellectual property rights for the global markets and propel Ascentage Pharma further into the transition towards a global innovative biopharma with vertically integrated capabilities covering the entire ecosystem.

In January 2023, Ascentage Pharma successfully raised HKD550 million through the follow on placement, which proved the investors’ strong recognition for the company’s value. Recently, the Shanghai Stock Exchange selected Ascentage Pharma for the initial inclusion in the Shanghai-Hong Kong Stock Connect Program, officially effective as of March 13, 2013. Following this adjustment, Ascentage Pharma is now a company included in both Shenzhen-Hong Kong and Shanghai-Hong Kong Stock Connect Programs. This could potentially lead to increased trading volume and improved liquidity for the company’s stocks.

"2022 was indeed an extraordinary year for Ascentage Pharma as we delivered multiple milestones, among which, the inclusion of olverembatinib into the 2022 NRDL was vital for bolstering the drug’s accessibility and affordability for patients. Thus far, olverembatinib has already delivered strong sales and further boosted our confidence in the product. Furthermore, the China CDE has accepted and granted Priority Review designation for an NDA supporting a full approval of olverembatinib, which paved the way for a potential new treatment option for the broad population of patients with CML," said Dr. Dajun Yang, Chairman & CEO of Ascentage Pharma. "The impressive success of olverembatinib highlights our commitment to fulfilling the mission of addressing unmet clinical needs in China and around the world, and our patient-focused global innovation strategy. In the past year, we released results from several clinical programs at some of the most renowned international congresses, wining us widespread recognition for our robust global innovation capabilities."

Dr. Yang continued, "Also in the past year, we were granted a Drug Manufacturing License (Certificate A) that allowed us to commence operations at our Global Manufacturing Center, another big step in our transition from a biotech to a biopharma. Meanwhile, we successfully raised HKD550 million in early 2023, giving the company a stronger balance sheet that will better support our operations."

In conclusion, Dr. Yang said, "moving forward, we will continue to expand the reimbursement coverage for olverembatinib, further improve the drug’s accessibility, and explore the drug’s additional therapeutic potential for the benefit of more patients. To deepen the implementation of our global innovation strategy, we will forge ahead with the global clinical development of our key assets such as lisaftoclax to address urgent unmet medical needs in China and around the world. Building on our past success, we will strive to bring more novel therapeutics to patients and create greater value for our shareholders."

Tyra Biosciences Reports Fourth Quarter and Full Year 2022 Financial Results and Highlights

On March 22, 2023 Tyra Biosciences, Inc. (Nasdaq: TYRA), a clinical-stage biotechnology company focused on developing next-generation precision medicines that target large opportunities in Fibroblast Growth Factor Receptor (FGFR) biology, reported financial results for the quarter and year ended December 31, 2022, and highlighted recent corporate progress (Press release, Tyra Biosciences, MAR 22, 2023, View Source [SID1234629175]).

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"2022 was a momentous year for TYRA – we achieved significant milestones, evolved into a clinical-stage company, and leveraged our expertise in FGFR biology to expand our therapeutic focus beyond oncology to include genetically defined conditions," said Todd Harris, CEO of TYRA. "We believe TYRA-300 has the potential to become a best-in-class agent and we look forward to advancing it in both oncology and achondroplasia. Further, we have made steady progress utilizing our SNÅP discovery engine and expect to nominate additional clinical candidates."

Alan Fuhrman, CFO of TYRA, added, "TYRA is in a very strong financial position to begin 2023, with $251.2 million in cash and cash equivalents at year-end 2022, representing more than two years of expected cash runway to support our current development plans across our precision medicine platform."

Fourth Quarter 2022 and Recent Corporate Highlights

TYRA-300

Initiated SURF301 Phase 1/2 Study for Oncology. In November 2022, TYRA announced that patient dosing had commenced in its Phase 1/2 SURF301 clinical study of TYRA-300. SURF301 (NCT05544552) was designed to determine the optimal and maximum tolerated doses (MTD) and the recommended Phase 2 dose (RP2D) of TYRA-300, as well as to evaluate the preliminary antitumor activity of TYRA-300.
Expanded Development into Achondroplasia. In March 2023, TYRA announced the expansion of development of TYRA-300 into achondroplasia (ACH) based on positive preclinical results in a study performed in collaboration with the Imagine Institute in Paris, France. TYRA-300, an investigational agent, is a once-daily oral FGFR3 selective inhibitor whose design may have a meaningful impact on achondroplasia and other skeletal dysplasias.
In the study, TYRA-300 was evaluated in FGFR3 wild-type and mutant preclinical models to measure increases in growth and bone length, compared to vehicle-treated mice. In an FGFR3 Y367C/+ model, TYRA-300 was administered daily at a 1.2 mg/kg dose for 15 days. TYRA-300 increased body length in mice by 17.6% compared to the vehicle (p<0.0001) and increased the length of the femur (+24.4%), tibia (+38.3%) and L4-L6 (+23.9%) in mice (p<0.0001).
TYRA expects to submit an Investigational New Drug application (IND) to the U.S. Food and Drug Administration (FDA) to enable a Phase 2 study of TYRA-300 in pediatric achondroplasia in 2024.
TYRA-200

Announced IND Clearance. In March 2023, TYRA announced that the FDA cleared its IND to proceed with a Phase 1 clinical study of TYRA-200, an FGFR1/2/3 inhibitor with potency against activating FGFR2 gene alterations and resistance mutations. The trial will be focused on intrahepatic cholangiocarcinoma resistant to prior FGFR inhibitors. TYRA expects the first patient will be dosed in this trial in the second half of 2023.
SNÅP Platform and Pipeline

TYRA continued to use its in-house precision medicine discovery engine, SNÅP, to develop therapies in targeted oncology and genetically defined conditions including FGF19+/FGR4-driven cancers, and RET (REarranged during Transfection kinase) driven cancers.
Corporate

Strengthened Executive Team with Key Hire. During the fourth quarter of 2022, TYRA appointed experienced biotechnology veteran Alan Fuhrman as Chief Financial Officer.
Fourth Quarter and Full-Year 2022 Financial Results

Fourth quarter 2022 net loss was $12.9 million compared to $9.9 million for the same period in 2021.
Fourth quarter 2022 research and development expenses were $10.4 million compared to $7.2 million for the same period in 2021.
Fourth quarter 2022 general and administrative expenses were $4.6 million compared to $2.7 million for the same period in 2021.
Full year 2022 net loss was $55.3 million compared to $26.3 million for the same period in 2021.
Full year 2022 research and development expenses were $43.0 million compared to $20.6 million for the same period in 2021.
Full year 2022 general and administrative expenses were $15.9 million compared to $5.7 million for the same period in 2021.
As of December 31, 2022, TYRA had cash and cash equivalents of $251.2 million.
About TYRA-300

TYRA-300 is the Company’s lead precision medicine program stemming from its in-house SNÅP platform. TYRA-300 is an investigational, oral, FGFR3-selective inhibitor currently in development for the treatment of cancer and skeletal dysplasias including achondroplasia. TYRA-300 is being evaluated in a multi-center, open label Phase 1/2 clinical study, SURF301 (Study in Untreated and Resistant FGFR3+ Advanced Solid Tumors). SURF301 (NCT05544552) was designed to determine the optimal and maximum tolerated doses (MTD) and the recommended Phase 2 dose (RP2D) of TYRA-300, as well as to evaluate the preliminary antitumor activity of TYRA-300. SURF301 is currently enrolling adults with advanced urothelial carcinoma and other solid tumors with FGFR3 gene alterations. In skeletal dysplasias, TYRA-300 has demonstrated positive preclinical results and the Company expects to submit an IND for the initiation of a Phase 2 clinical study in pediatric achondroplasia in 2024.

Transcenta Announces First Patient Dosed in the U.S. Study of Its First-In-Class Gremlin1 Targeting Antibody TST003 for the Treatment of Solid Tumors

On March 22, 2023 Transcenta Holding Limited ("Transcenta") (HKEX: 06628), a clinical stage biopharmaceutical company with fully-integrated capabilities in discovery, research, development and manufacturing of antibody-based therapeutics, reported the successful dosing of first patient in the U.S. Phase I Study of TST003 (NCT05731271), its first-in-class, high affinity humanized monoclonal antibody targeting Gremlin1, for the treatment of solid tumors (Press release, Transcenta, MAR 22, 2023, View Source [SID1234629174]).

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NCT05731271 is an open-label, dose escalation, FIH study designed to evaluate the safety, tolerability, and pharmacokinetics profile of TST003 as a treatment in patients with solid tumors.

TST003 is a high affinity monoclonal antibody targeting Gremlin1, a member of the TGF-β superfamily. Gremlin1 protein is a highly conserved secreted protein and has shown to play important roles during embryonic development and promote epithelial mesenchymal transition. Gremlin1 is upregulated in multiple solid tumors. TST003 has demonstrated promising single agent and combination activities in patient-derived xenograft tumor models from the difficult-to-treat solid tumors resistant to checkpoint inhibitors including castration resistant prostate cancer and microsatellite stable colorectal cancer.

"The enrollment and dosing of the first patient in the U.S. marks a very significant milestone for TST003: our carefully designed Phase 1 will provide the necessary clinical and translational data to achieve the full potential of targeting Gremlin1 as a single agent or in combinations with standard of care, in particular in indications with high unmet need like MSS CRC or CRPC." said Dr. Caroline Germa, Transcenta’s Executive Vice President, Global Medicine Development and Chief Medical Officer.

Transcenta to Present Two Preclinical Studies at AACR 2023

On March 22, 2023 Transcenta Holding Limited ("Transcenta") (HKEX: 06628), a clinical stage biopharmaceutical company with fully-integrated capabilities in discovery, research, development and manufacturing of antibody-based therapeutics, reported that two preclinical studies in relation to TST003, a First-in-Class mAb Targeting GREMLIN-1, and TST010, an ADCC enhanced anti-CD25 mAb will be presented as posters at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2023 (Press release, Transcenta, MAR 22, 2023, View Source [SID1234629173]). This year’s meeting will be held from April 14-19, 2023, in Orlando, Florida, USA.

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The AACR (Free AACR Whitepaper) Annual Meeting is the focal point of the cancer research community, where scientists, clinicians, other health care professionals, survivors, patients, and advocates gather to share the latest advances in cancer science and medicine from institutions all over the world.

A brief summary of the presentations is as follows:
Title: The Preclinical Characterization of TST003, a First-in-Class mAb Targeting GREMLIN-1 Overexpressed by Cancer-Associated Fibroblasts and Tumor Cells
Abstract#: 465
Session Category: Experimental and Molecular Therapeutics
Session Title: New Drug Targets
Session Date and Time: Sunday Apr 16, 2023 1:30 PM – 5:00 PM (EDT)

Title: ADCC enhanced anti-CD25 mAb (TST010) exhibited potent anti-tumor activity by depleting Treg cells and increasing CD8+T/Treg ratio in preclinical tumor models
Abstract#: 1546
Session Category: Experimental and Molecular Therapeutics
Session Title: Antibody Drug Conjugates
Session Time: Monday Apr 17, 2023 9:00 AM – 12:30 PM (EDT)

About TST003

TST003 is a high affinity monoclonal antibody targeting Gremlin1, a member of the TGF-β superfamily. Gremlin1 protein is a highly conserved secreted protein and has shown to play important roles during embryonic development and promote epithelial mesenchymal transition. Gremlin1 is upregulated in multiple solid tumors. TST003 has demonstrated promising single agent and combination activities in patient-derived xenograft tumor models from the difficult-to-treat solid tumors resistant to checkpoint inhibitors including castration resistant prostate cancer and microsatellite stable colorectal cancer.

About TST010

Using immune tolerance breaking antibody platform, Transcenta generated a humanized IgG1 subtype anti-CD25 monoclonal antibody with reduced fucose (TST010). TST010 binds to human CD25 with high affinity and selectivity, but does not block IL-2 binding to CD25. Non-blocking activity to IL-2 signaling on human PBMC has been further confirmed by the phosphorylation of STAT5. By reducing fucosylation during cell culture process, TST010 mAb gains the enhanced ADCC activity in vitro and anti-tumor activity by depleting Treg cells and increasing CD8+T/Treg ratio in preclinical tumor models.