Research Information
Research Interests
Dr. Sossey-Alaoui research program focuses on understanding the molecular, cellular, and systemic mechanisms that drive cancer progression, metastasis, immune evasion, and cancer health disparities, with a particular emphasis on triple-negative breast cancer (TNBC), one of the most aggressive and therapeutically challenging breast cancer subtypes. By integrating multi-omics technologies, computational biology, and systems-level analyses, my laboratory seeks to uncover the complex networks that regulate tumor evolution and identify novel therapeutic vulnerabilities that can be translated into improved patient outcomes.
A central theme of my research is cancer immunology and immuno-oncology, with a focus on elucidating how tumor-intrinsic signaling pathways shape the tumor microenvironment and suppress anti-tumor immunity. Our studies have identified key roles for the focal adhesion adaptor protein Kindlin-2 (K2) in promoting immune evasion through regulation of cytokine networks, immune checkpoint expression, myeloid cell recruitment, and hematopoietic remodeling. Using single-cell genomics, spatial profiling, proteomics, and functional immunology approaches, we investigate how oncogenic signaling pathways reprogram both local and systemic immune responses to facilitate tumor growth and metastatic dissemination. These studies aim to identify mechanisms of resistance to immunotherapy and develop strategies that enhance anti-tumor immune responses.
A second major focus of my laboratory is the investigation of the biological determinants of cancer health disparities, particularly among women diagnosed with TNBC. African American women experience a disproportionate burden of TNBC, characterized by earlier onset, more aggressive disease, and poorer clinical outcomes. Our research seeks to define the molecular, genetic, and biological factors that contribute to these disparities and how they interact with social and environmental determinants of health. Through the integration of genomic, transcriptomic, epigenomic, and clinical datasets, we have identified the multifunctional RNA-binding protein YB-1–dependent signaling pathways that are differentially activated in tumors from African American women and contribute to therapy resistance, cancer stemness, and disease progression. These studies are aimed at identifying biologically informed strategies that advance precision oncology and reduce disparities in cancer outcomes.
An emerging area of emphasis in my research is the systemic role of tumor-derived small extracellular vesicles (sEVs) in cancer progression, metastasis, and immune suppression. We investigate how tumor-secreted sEVs function as long-range mediators of intercellular communication that remodel local and distant microenvironments, establish pre-metastatic niches, and reprogram immune and stromal cells. Our recent work demonstrates that TNBC-derived sEVs carry oncogenic cargo, including Kindlin-2 and associated signaling complexes, which can be transferred to recipient cells to promote invasion, metastatic colonization, fibroblast activation, and immune dysfunction. We are particularly interested in understanding how sEV-mediated communication contributes to systemic hematopoietic remodeling, expansion of immunosuppressive myeloid populations, and the creation of metastatic-permissive environments throughout the body.
To address these questions, my laboratory employs integrative systems biology approaches, combining multi-omics profiling—including single-cell and spatial transcriptomics, proteomics, phosphoproteomics, epigenomics, extracellular vesicle profiling, and computational network analysis—with mechanistic studies in advanced preclinical models. By integrating large-scale datasets across molecular, cellular, and tissue levels, we seek to construct comprehensive models of tumor progression and identify critical regulatory nodes that can be therapeutically targeted.
Collectively, these research areas converge on a common goal: to understand how oncogenic signaling networks, immune responses, systemic intercellular communication, and biological determinants of health interact to drive cancer progression and metastatic disease. Through the application of multi-omics and systems biology, our long-term objective is to develop innovative therapeutic strategies that inhibit metastasis, overcome immune evasion, reduce cancer health disparities, and improve outcomes for patients with aggressive cancers.