Clinical trials

The goal of this clinical trial is to compare the objective response rates (ORR) of different doses of BL0175 in patients with postmenopausal hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative locally advanced or metastatic breast cancer. The main questions it aims to answer are: 1. Which dose level of BL0175 demonstrates the optimal ORR? 2. What is the recommended phase 3 dose (RP3D) based on efficacy and safety data across the tested dose levels?

Lung cancer remains the leading cause of cancer deaths worldwide; in 2022, there were approximately 2.48 million new cases and 1.8 million deaths from lung cancer globally. Globally, lung cancer is the leading cause of cancer-related deaths in men and the second leading cause in women after breast cancer. Among them, small cell lung cancer (SCLC) accounts for approximately 14% of all newly diagnosed lung cancers. Small cell lung cancer (SCLC) is a highly heterogeneous and aggressive disease with poor survival outcomes. A 2-stage system dividing patients into limited and extensive disease was developed in 1973 by the United States (US) Veteran's Administration Lung Cancer Study Group (VALG), which has been used to this day. Patients with limited-stage SCLC can be treated with chemotherapy and radiation with the potential for long-term survival. However, the majority (approximately 70%) of patients with SCLC are diagnosed with extensive-stage SCLC (ES-SCLC), which has poor survival prospects. Chest pain, dyspnea, and cough are among the most frequent disease-related symptoms experienced by patients with SCLC. Immune checkpoint inhibitors in combination with platinum-based systemic therapy can palliate symptoms and prolong survival for patients with ES-SCLC. However, long-term survival is rare. The current standard first-line treatment for patients with ES-SCLC is immune checkpoint inhibitors in combination with platinum-based systemic therapy. Despite the impressive high objective response rates (approximately 60%-80%) observed with first-line treatment regimens, the median overall survival (OS) of patients rarely exceeds 16 months, and the median progression-free survival (PFS) is also limited to around 5 months. Second-line and subsequent therapeutic options are limited. The main treatment drugs include Topotecan, Lurbinectedin, Tarlatamab, etc., with objective response rates rarely exceeding 40%. Therefore, there is a significant need for improved novel treatment options for patients with ES-SCLC. This is a multi-center, open-label study. The study is designed to evaluate the safety, tolerability, and preliminary efficacy of Toripalimab in combination with BL0020 in patients with ES-SCLC who have relapsed or progressed following first-line platinum-based systemic treatment regimen.

The primary treatment option for non-small cell lung cancer (NSCLC) adenocarcinoma with activating epidermal growth factor receptor (EGFR) mutation is EGFR tyrosine kinase inhibitor (TKI). After a certain period of treatment with EGFR TKI, acquired resistance emerges most frequently with a secondary mutation, p.T790M, followed by MET amplification. Interestingly, up to 3-14% of patients experience histological transformation into small cell lung cancer (SCLC), which has an aggressive clinical course and a poor prognosis. The transformed SCLC retains the original EGFR mutation but significantly down regulates EGFR protein expression, eliminating its dependence on EGFR signaling while simultaneously acquiring a neuroendocrine phenotype. In nearly all cases, bi-allelic inactivation of both TP53 and RB1 is observed. However, little is known about the clinical outcomes of transformed SCLC, with limited studies arguing that their outcomes are similar to those of de novo SCLC, where the median overall survival is approximately 9 to 10 months after the transformation. At present, there is no standard treatment regimen for patients with SCLC transformed from NSCLC following EGFR TKI therapy. BL0020 is a polymer-drug conjugate consisting of Topoisomerase I inhibitor SN-38 (7-ethyl-10-hydroxycamptothecin) conjugated by a peptide linker to a PEG-modified poly(ε-L-lysine) polymer. In the ongoing first-in-human study of BL0020, significant efficacy has been observed with BL0020 monotherapy in SCLC patients who have relapsed or progressed following at least first-line platinum-based systemic treatment. Based on previous clinical and preclinical outcomes that show similar disease characteristics between SCLC transformed from NSCLC following EGFR TKI therapy and de novo SCLC, this study is designed to evaluate the clinical efficacy and safety of BL0020 in patients with transformed SCLC.

The goal of this clinical trial is to learn the safety and PK of the single dose of BL0175 Injection in postmenopausal women and to compare that with a single dose of Fulvestrant Injection. The main questions it aims to answer are: * What medical problems do participants have when using drug BL0175? * How long can BL0175 remain in your blood? Participants will receive a single dose of drug BL0175 or a single dose of Fulvestrant Injection in a randomized method

The goal of this clinical trial is to learn if the investigational drug BL0175 works to treat adult postmenopausal women with hormone receptor (HR)-positive, human epidermal growth factor receptor (HER2)-negative locally advanced or metastatic breast cancer, ovarian cancer and endometrial cancer. It will also learn about the safety of BL0175. The main questions it aims to answer are: * Does the investigational drug BL0175 is safe for participants after dosed -multiple times? * Which is the highest safety dose of BL0175 after multiple dose? * What medical problems do participants have when using BL0175? * Does the investigational drug BL0175 works for participants after dosed -multiple times?