bluuebunny/crossref_metadata_2025_split huggingface dataset:
Abstract 6289: Enhancer reprogramming by novel SMARCA2 degrading PROTACs underlies therapeutic utility in SMARCA4 mutant tumors
Authors: Kotagiri Sasi , Blazanin Nicholas , Xi Yuanxin , Wang Jing , Lissanu Yonathan 
Published: June 2023

Abstract
Lung cancer is the top cause of cancer mortality. Despite recent advances, the majority of patients with lung cancer still lack effective therapeutic options, underscoring the dire need for additional treatment approaches. Genomic studies have identified frequent mutations in subunits of the SWI/SNF chromatin remodeling complex including SMARCA4 and ARID1A in non-small cell lung cancer with a frequency of up to 33% in advanced stage disease, making it the most frequently mutated complex in lung cancer. Recent reports, as well as our own data, have identified the paralogue SMARCA2 to be synthetic lethal to SMARCA4 suggesting SMARCA2 is a valuable therapeutic target. However, the discovery of selective inhibitors of SMARCA2 has been challenging. To overcome this hurdle, we have utilized iterative structure-activity relationship (SAR) studies to develop novel, potent and selective SMARCA2 degrading small molecules based on proteolysis targeting chimera (PROTAC) technology. We demonstrated that YD23, our lead SMARCA2 PROTAC, potently and selectively induces degradation of SMARCA2. Mechanistically, we demonstrated that YD23 reduces chromatin accessibility only in SMARCA4-deficient cells with profoundly decreased chromatin accessibility at enhancer regions. Gene expression profiling and pathway analysis indicated that core cell cycle genes were downregulated by YD23 and is consistent with reduced chromatin accessibility at their regulatory regions. Furthermore, integrative analysis of RNA-seq and ATAC-seq revealed a strong correlation between gene expression and enhancer accessibility changes by YD23. In particular, we identified the mitotic regulator NEDD9 as a critical target in enhancers that are strongly reduced by YD23 in SMARCA4-deficient lung cancer cells. In conclusion, our study provides a promising chemical probe for studying the synthetic lethal interaction between SMARCA2 and SMARCA4, dissect the chromatin and epigenetic landscape alterations and lay the foundation for future preclinical and clinical development of SMARCA2 degraders as therapeutics.
Citation Format: Sasi Kotagiri, Nicholas Blazanin, Yuanxin Xi, Jing Wang, Yonathan Lissanu. Enhancer reprogramming by novel SMARCA2 degrading PROTACs underlies therapeutic utility in SMARCA4 mutant tumors [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6289.
Abstract 629: Characterization of the molecular mechanism of APOC1 in anti-ferroptosis and lymph node microenvironment remodeling in ESCC metastasis process
Authors: Liu Beilei , Zhang Baifeng , Zhou Hongyu , Tan Licheng , Fang Xiaona , Gong Lanqi , Luo Jie , Huang Jinlin , Huang Jiao , Yang Yuma , Guan Xinyuan 
Published: June 2023

Abstract
The invasion and metastasis affect the survival and prognosis of patients with esophageal carcinoma (ESCC). Through single-cell sequencing analysis of para-cancerous tissue, tumor tissue, normal lymph node tissue and lymph node metastasis tissue in 4 untreated ESCC patients, we found that APOC1 was specifically up-regulated in lymph node metastasis tissue and tumor tissue. In vitro and in vivo experiments revealed that APOC1 overexpression significantly promoted the migration and anti-ferroptosis function in ESCC. Also, APOC1 upregulation promotes M2 macrophage differentiation, Treg aggregation, and CD8 T cell immune inactivation in lymph node metastasis tissue. Mechanistically, APOC1 competes with NRF2 to bind Keap1, promoting nuclear translocation of NRF2 thus upregulating activation of the NRF2 pathway in tumor cells. For the lymph node metastasis tumor microenvironment, secreted APOC1 could upregulate the oxLDL which induced M2 macrophage polarization via CD36/JAK2/STAT3 axis. Overall, in this study, we explored the role and molecular mechanism of APOC1 in ESCC metastasis process which could provide a new molecular therapeutic approach to ESCC patients.
Citation Format: Beilei Liu, Baifeng Zhang, Hongyu Zhou, Licheng Tan, Xiaona Fang, Lanqi Gong, Jie Luo, Jinlin Huang, Jiao Huang, Yuma Yang, Xinyuan Guan. Characterization of the molecular mechanism of APOC1 in anti-ferroptosis and lymph node microenvironment remodeling in ESCC metastasis process [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 629.
Abstract 632: Exploiting pyroptosis in melanoma brain metastasis
Authors: Cavallo Maria R. 
Published: June 2023

Abstract
Melanoma is the deadliest form of skin cancer due to its frequent metastasis to the brain. Melanoma brain metastases (MBM) are a significant clinical challenge, and current model systems and therapeutic strategies are poor. Inhibitors targeting the most common oncogenic driver of melanoma, BRAFV600E (BRAFi), disrupt mitogenic signaling and promote caspase-3 associated cell death. Though caspase-3 is a well-known apoptotic driver, it can also cleave Gasdermin E (GSDME) to create pore-forming N-terminal fragments that oligomerize at plasma and mitochondrial membranes and trigger pyroptosis - a form of immunogenic cell death (ICD). Our recent work illustrates the importance of GSDME mediated pyroptosis and associated immunogenicity in providing a durable therapeutic response against melanoma. Since pyroptosis can be activated by GSDME cleavage via caspase-3, and is prominent in various neuropathologies, a better understanding of the interplay between central nervous system (CNS) immune cells and BRAFi-mediated ICD is critical for designing more effective therapies against MBM. Here, we engineered a panel of inducible pyroptotic melanoma cells to model BRAFi-mediated pyroptosis. Using ex vivo CNS slice co-cultures, we found that inducible N-GSDME expression in human and murine melanoma cells drives propidium iodide uptake and release of inflammatory activators like HMGB1 and IL-1 - hallmarks of pyroptosis. Importantly, conditioned media from these pyroptotic cells stimulates a more robust phagocytic response from resident macrophages of the CNS and pyroptotic melanoma elicit stronger cytotoxicity from syngeneic CD8+ T cells, further highlighting the benefits of BRAFi-mediated ICD. Our findings provide evidence that resident CNS immune cells and peripheral T cells respond to pyroptotic melanoma, suggesting that induction of ICD should be a consideration in the development of anti-MBM therapies.
Citation Format: Maria R. Cavallo. Exploiting pyroptosis in melanoma brain metastasis [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 632.
Abstract 6320: CUSP06/AMT-707, a new CDH6-targeting antibody-drug conjugate, demonstrates potent antitumor activity in preclinical models
Authors: Lu Wei , Shi Jing , Liu Shu-Hui , Covino Nicole , Meng Xun , Slosberg Eric D. 
Published: June 2023

Abstract
Cadherin-6 (CDH6), also known as K-cadherin, is a type II classic cadherin molecule that plays an important role in the embryonic development of the kidney, but has very limited expression in adult tissues. It is overexpressed in several human malignancies, primarily in ovarian, renal, but also (to a lesser degree) gastric, thyroid, cholangiocarcinoma and other tumor types. The characteristics of limited expression in normal tissues, high expression in tumor tissues, and rapid internalization upon antibody binding makes CDH6 a well-suited Antibody-drug Conjugate (ADC) target. We developed a novel CDH6-targeting ADC, CUSP06, consisting of a proprietary humanized antibody selective for CDH6, a protease cleavable linker, and an exatecan payload, with a drug-to-antibody ratio (DAR) of 8. CUSP06 selectively bound to cell surface CDH6 and was efficiently internalized into CDH6 positive ovarian and renal cancer cells. CUSP06 exhibited strong antiproliferative activity against several CDH6 positive cancer cell lines in vitro. Furthermore, compared to a DXd-based ADC, a exatecan-based ADC demonstrated improved bystander effect. Treatment with CUSP06 resulted in tumor regression in several CDH6 positive cell line derived xenograft (CDX) models, including PA-1, OVCAR3, and 786-O. In addition, CUSP06 demonstrated potent antitumor activity with tumor regression observed in two CDH6 low and high expressing patient derived xenograft (PDX) models. The preclinical activity of CUSP06 against CDH6-expressing tumors provide compelling support for the clinical development of CUSP06 in CDH6-expressing human cancers. CUSP06 is currently in IND-enabling studies. CUSP06 showed an expected toxicity profile consistent with it's exatecan payload in the ongoing pilot toxicology studies. We plan to initiate a Phase 1 first-in-human clinical trial in the 2nd half of 2023.
Citation Format: Wei Lu, Jing Shi, Shu-Hui Liu, Nicole Covino, Xun Meng, Eric D. Slosberg. CUSP06/AMT-707, a new CDH6-targeting antibody-drug conjugate, demonstrates potent antitumor activity in preclinical models [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6320.
Abstract 6327: Intratumoral administration of ultra high-concentration nitric oxide (UNO) is more efficacious than anti-PD1 therapy in 4T1 tumor-bearing mice
Authors: Epshtein Yana , Goldshtein Matan , Chaisson Selena , Monson Jedidiah , Johnson Matt , Avniel Amir , Lisi Steve , Confino Hila 
Published: June 2023

Abstract
Background: For the majority of metastatic triple-negative breast cancer (mTNBC) patients, chemotherapy is the standard first-line treatment, however, outcomes in this population are poor. A monoclonal antibody against the immune checkpoint inhibitor anti-programmed death 1 (PD-1) also has antitumor activity in patients with mTNBC. Previously, we reported that delivering ultra-high concentrations of nitric oxide (UNO) to mouse colon tumors stimulated innate and adaptive immune responses leading to the rejection of secondarily-induced tumors. Moreover, adding an anti-PD-1 antibody to UNO treatment resulted in primary tumor regression in 53% of the mice, the rejection of a distant tumors in all mice, and prolonged survival compared to control and anti-PD-1 arms. In this in vivo study, we investigated the ability of UNO to improve the efficacy of anti-PD-1 antibody treatment in the aggressive mouse breast cancer model, 4T1.
Methods: We tested two treatment protocols: 4T1 mice tumors were treated with either a single dose of UNO and anti-PD-1 or a repeated dose of UNO and anti-PD-1. In the single dose design, 4T1 tumors were treated with a single administration of UNO combined with Anti-PD1 administration starting one day after UNO treatment (n=9-10 mice per group). In the repeated dosing design, 4T1 tumors were treated with UNO twice combined with Anti-PD-1 administration starting on the first UNO treatment day (n=8 mice per group). • UNO treatment regimen: 50,000 ppm, 10 minutes, flow rate ~0.2 liters per minute • Anti-PD1 treatment regimen: 10 mg/kg antibody was administered every 3 days for a total of 5 treatments.
Results (UNO Single Dose): The primary tumors of 4T1 tumor-bearing mice were 13.2% smaller in the combined single-dose UNO group compared to anti-PD-1 alone 15 days post-UNO treatment.
Results (UNO Repeated Dosing): The primary tumors of 4T1 tumor-bearing mice were 25.2% smaller in the combined repeated dose UNO group compared to the anti-PD-1 alone group 16 days after the first UNO treatment.
Conclusion: Treating 4T1 tumors with single and repeated doses of UNO improved outcomes compared to anti-PD-1 alone. This suggests that local short-term treatment with UNO can serve as a treatment option for cancer patients with tumors that are not amenable to immune checkpoint inhibitor treatment.
Citation Format: Yana Epshtein, Matan Goldshtein, Selena Chaisson, Jedidiah Monson, Matt Johnson, Amir Avniel, Steve Lisi, Hila Confino. Intratumoral administration of ultra high-concentration nitric oxide (UNO) is more efficacious than anti-PD1 therapy in 4T1 tumor-bearing mice [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6327.
Abstract 6328: An off-the-shelf Twin BiTE combination therapy controls heterogenous glioblastoma and shapes immune response
Authors: Rossignoli Filippo , Borges Paulo , Lumia Rebecca , Shah Khalid 
Published: June 2023

Abstract
Glioblastoma (GBM) is the most common primary brain tumor in adults, characterized by a median survival of 12-14 months with less than 10% of patients surviving at least 2 years from diagnosis. The discovery of tumor-associated antigens (TAAs) has permitted development of a new array of therapeutic strategies that selectively target GBM and spare normal cells of the CNS. In this study we used an alternative off-the-shelf approach to activate the immune system and direct it against the tumor, taking into account antigen heterogeneity and TME immune suppression without the need of engineering the patient’s immune cells. We generated TAA-targeting Bispecific T-cell Engagers (BiTEs) and engineered adult stem cells to secrete twin BiTEs (T-BiTE-SC). The approach was tested in combination with in naïve T cells on established and primary patient-derived cell lines expressing various levels of the target antigens. Moreover, to further support the therapeutic action of T cells, and combat immune-suppressive microenvironment and exhaustion, we combined our T-BiTE SC with an immune-stimulating cytokine. We show the efficacy of the individual BiTEs against different primary and established tumor cell lines. Moreover, the T-BiTE-SC, significantly controlled the growth of a tumor expressing heterogeneous levels of the targeted antigens. The immune stimulation reduced T cell exhaustion and consolidated a Th1 phenotype. Altogether our study demonstrated the feasibility and efficacy of an off-the-shelf immunotherapy, based on BiTEs simultaneously targeting tumor heterogeneity without the need for direct engineering of the immune cells.
Citation Format: Filippo Rossignoli, Paulo Borges, Rebecca Lumia, Khalid Shah. An off-the-shelf Twin BiTE combination therapy controls heterogenous glioblastoma and shapes immune response [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6328.
Abstract 6333: Repurposing NSAIDs for chemo-immunotherapy: mechanisms beyond COX inhibition
Authors: Okoko Ogacheko D. , Gazi Md Y. , Wang Xin , Brandle Caitlin , Kehinde-Ige Mercy , Piazza Gary A. , Shi Huidong , Zhou Gang 
Published: June 2023

Abstract
It has been well-established that some nonsteroidal anti-inflammatory drugs (NSAIDs) have antitumor activities. The beneficial effects of these NSAIDs are mainly attributed to their ability to inhibit the production and activity of cyclooxygenases (COX1 and COX2) and prostaglandin (PGE2), which are known to promote tumor progression, angiogenesis, metastasis and immunosuppression. We recently reported that administration of indomethacin, a prototypical NSAID, can enhance the antitumor efficacy of adoptive T cell therapy in animal models. However, currently adoptive T cell therapy as a treatment option is only suitable for selected patients with certain types of cancer. Here, we set out to explore the utility of indomethacin in a chemo-immunotherapy setting that is readily applicable to a wide range of cancers. Cyclophosphamide (CTX) is a widely used antineoplastic chemotherapeutic agent with immunostimulatory activities when used at low-medium doses. We show that indomethacin had no impact on tumor growth but can significantly enhance the antitumor effect of CTX in multiple mouse tumor models. The beneficial effect of indomethacin was diminished in immunodeficient mice or CD8 T cell-depleted wild-type mice, indicating the requirement for the host immunity. Furthermore, the CTX and indomethacin regimen can sensitize tumors to anti-PD1 immunotherapy. scRNAseq analysis of tumor samples revealed the impact of indomethacin on the tumor microenvironment. Our data also indicate that the immunopotentiating effect of indomethacin can be independent of PGE2 inhibition, and involves the TRAIL-DR5 axis in promoting tumor regression. Other potential mechanisms, including modulation of chronic interferon signaling in tumor cells, have also been investigated. Altogether, our study sheds light on the multiple mechanisms underlying indomethacin’s beneficial effects, and highlights the potential of NSAID administration as a readily applicable and cost-effective approach to augment the efficacy of chemo-immunotherapy.
Citation Format: Ogacheko D. Okoko, Md Y. Gazi, Xin Wang, Caitlin Brandle, Mercy Kehinde-Ige, Gary A. Piazza, Huidong Shi, Gang Zhou. Repurposing NSAIDs for chemo-immunotherapy: mechanisms beyond COX inhibition [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6333.
Abstract 6341: Preclinical development of a monoclonal antibody targeting CD70 as cancer immunotherapy
Authors: Tian Wenzhi , Li Song , Chen Dianze , Liu Dandan , Guo Huiqin , Yang Chunmei , Zhang Li , Zhang Wei , Tu Xiaoping , Peng Liang , Zhao Gui , Zhang Ruliang , Zhang Fan , Gan Frank X. 
Published: June 2023

Abstract
CD70 is a novel immune checkpoint highly expressed on cancers of kidney, blood and lymphoid tissues, mesothelium and gastrointestinal system. High expression of CD70 is a prognostic marker for poor survival in patients with ovarian carcinoma, pancreatic cancer and mesothelioma, etc. Several CD70 antibodies are under early stages of clinical trials for oncology indications. We have developed IMM40H, a humanized IgG1 antibody that differentially induces phagocytosis and cytotoxicity in CD70-expressing cancer cells. Results of in vitro study have demonstrated that, in comparison with cusatuzumab, IMM40H possesses better CD70 binding (kD= 3.22E-11M) and functional inhibition ability, as well as more potent activities of ADCC (antibody-dependent cellular cytotoxicity, EC50 = 0.5 -2.0ng/ml) and CDC (complement-dependent cytotoxicity, EC50 = 170 ng/mL) against certain cancer cells. IMM40H also induces strong ADCP (antibody-dependent cellular phagocytosis) activity (EC50 = 0.02nM). At doses between 0.3 mg/kg to 10mg/kg, IMM40H significantly reduced tumor volume in mouse models of multiple myeloma, lymphoma and kidney cancer. Notably, in a U266 multiple myeloma model, IMM40H, at the dose of 0.3 mg/kg, completely inhibited tumor growth in a way that therapeutic effects appeared significantly earlier than that of cusatuzumab at a higher dose of 1 mg/kg. Therapeutic effects of IMM40H at the dose of 3 mg/kg also appeared earlier than that of bortezomib at the dose of 0.5 mg/kg. Interestingly, combination of IMM40H and IMM01 (a SIRPα-IgG1 Fc fusion protein targeting CD47) generated significant therapeutic synergy in models of A498 kidney cancer and Raji lymphoma. Importantly, maximum tolerated dose of IMM40H exceeds 100 mg/kg (IV, single dose) in cynomolgus monkeys and no significant adverse reaction was observed at a dose range of 3 to 30 mg/kg (IV, QW, 5 times) in monkeys. Taken together, our data show that targeting CD70 on tumor cells using IMM40H antibody may serve as a potent immunotherapy for multiple cancer indications. IND of IMM40H has been approved in China and US. This antibody is now in a phase 1 study in patients with advanced malignancies expressing CD70.
Citation Format: Wenzhi Tian, Song Li, Dianze Chen, Dandan Liu, Huiqin Guo, Chunmei Yang, Li Zhang, Wei Zhang, Xiaoping Tu, Liang Peng, Gui Zhao, Ruliang Zhang, Fan Zhang, Frank X. Gan. Preclinical development of a monoclonal antibody targeting CD70 as cancer immunotherapy. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6341.
Abstract 6343: 7E1, a novel blocking antibody targeting human anti-Müllerian-hormone-receptor II (AMHRII), elicits potent anti-tumor activity in vivo
Authors: Yang Yongfei , Li Huilin , Li Hao , Yan Yue , Li Jianhui , Lin Qingcong , Yin Huijun , Zhou Xiangshan , Zhang Miao , Wu Kunbao , Sun Leqiao , Zhong Shan 
Published: June 2023

Abstract
Anti-Müllerian hormone (AMH), is a TGF-β family autocrine hormone and cognate ligand for the type II AMH receptor (AMHR2). AMH signaling through AMHR2 plays an important role in fetal sexual development by inducing Müllerian duct regression in males. AMHR2 is aberrantly expressed in various human malignancies, including colon, testis, gastric, and ovarian cancers. Functionally, AMH has complex effects on cell cycle regulation; at physiological concentrations it promotes survival and chemoresistance of cell lines, whereas at supraphysiological concentrations it inhibits tumor cell viability. Like other TGF-β family members, binding of its target receptor effects changes in gene expression through activation of intracellular SMAD, NF-κB, and Akt signaling. We developed a fully human anti-AMHR2 monoclonal antibody, 7E1, from RenMab™ mice, which contain the full human immunoglobulin variable domain. 7E1 was found to contain a distinct binding epitope associated with efficient inhibition of AMH binding and signaling. 7E1 also displayed a better ADCC effect than the reference AMHR2 antibody. The in vivo half-life of 7E1 in AMHR2- and FcRn-humanized mice exceeded the reference antibody as well and is in a desirable range from a development perspective. To evaluate the safety and efficacy of 7E1 in vivo, we established syngeneic murine tumor models in AMHR2-humanized mice. We found that 7E1 monotherapy significantly inhibited tumor growth in a dose-dependent manner. Moreover, 7E1 was well tolerated in mice, and no adverse effects were observed even at extremely high doses (e.g. 100 mg/kg). Taken together, these data demonstrate that 7E1 is a novel anti-human AMHR2 blocking antibody with desirable pharmacokinetic and pharmacodynamic properties. 7E1 may potentially find broad application for a range of cancer indications in which AMH signaling is implicated.
Citation Format: Yongfei Yang, Huilin Li, Hao Li, Yue Yan, Jianhui Li, Qingcong Lin, Huijun Yin, Xiangshan Zhou, Miao Zhang, Kunbao Wu, Leqiao Sun, Shan Zhong. 7E1, a novel blocking antibody targeting human anti-Müllerian-hormone-receptor II (AMHRII), elicits potent anti-tumor activity in vivo [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 6343.