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Subject: Conference

Shasqi Presents Initial Data Validating Approach of Click Chemistry Activated Oncology Therapeutics at ESMO Congress 2021


Shasqi, a clinical-stage biotechnology company developing precision activated oncology therapeutics with its proprietary Click Activated Protodrugs Against Cancer (CAPACtm) platform, presented interim data from its Phase 1 clinical study of SQ3370 in advanced sarcomas and other solid tumors, as well as additional non-clinical data at the European Society for Medical Oncology (ESMO) Congress, being held virtually on September 16-21, 2021.

The interim Phase 1 clinical data were presented at the developmental therapeutics virtual poster session:

The non-clinical data were presented at the basic science virtual poster session:

"These early data from our Phase 1 study of SQ3370 provide initial validation for our click chemistry-based platform in humans with an encouraging safety profile," said José M. Mejía Oneto, M.D., Ph.D., Founder and CEO of Shasqi. "Cytotoxic agents remain standard of care for many cancers because they are effective at killing tumor cells. Our platform is designed to enhance the therapeutic benefit of these agents while minimizing toxicity. With this early validation of our platform, we can continue to advance SQ3370 and explore the application of our technology beyond chemotherapies to other standard of care cancer therapies with a limited therapeutic window."

"Conventional chemotherapeutics are not tumor-specific and can lead to toxicity. In this study, which administered up to four times the standard dose of doxorubicin, we showed that SQ3370 has the potential to widen the therapeutic window and improve the safety profile when compared to standard doxorubicin or liposomal doxorubicin," said Vivek Subbiah, M.D., Principal Investigator, Associate Professor of Investigational Cancer Therapeutics at The University of Texas MD Anderson Cancer Center. "The early signs of clinical activity without dose limiting toxicities in this group of heavily pretreated patients, some of whom have progressed through standard doxorubicin and other chemotherapies, are encouraging. As the study advances, we will further evaluate the safety and efficacy of higher doses of SQ3370."

The interim Phase 1 results of the first-in-human, dose escalation study of SQ3370 in patients with advanced solid tumors that are refractory/relapsed following or otherwise ineligible for standard of care therapy, were presented in poster format at ESMO 2021. Key study findings include:

Non-clinical results on the safety, PK, and antitumor efficacy of Click Activated Protodrugs Against Cancer (CAPAC) Platform in animal models were presented in poster format at ESMO 2021. Key findings included:

CAPAC and SQ3370:

SQ3370 utilizes Shasqi's proprietary CAPAC platform, a click chemistry-based approach that activates cancer drugs at a tumor with decreased systemic toxicity. The platform is based on the chemical reaction between an attenuated trans-cyclooctene-modified protodrug and a tetrazine-modified biopolymer. The biopolymer is injected into the target tumor lesion, where it precisely activates an intravenously infused protodrug. Unlike traditional targeted therapies, the CAPAC platform is agnostic to tumor characteristics that can vary from patient to patient, such as biomarker expression and enzymatic activity.

About Shasqi:

Shasqi is a privately held, clinical-stage biotechnology company whose mission is to enable patients to beat cancer without poisoning their bodies. Shasqi leverages its proprietary CAPAC Platform to develop precision oncology therapeutics designed to improve efficacy while decreasing systemic toxicity. Shasqi's CAPAC Platform is highly modular and can be applied to a broad range of drugs that are otherwise limited by toxicity, enabling the exploration of therapeutic biology in ways that were not previously possible.


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