Dr. Eva Sapi, Chair of the Department of Biology and Environmental Sciences at the University of New Haven, has led notable research at the intersection of Borrelia burgdorferi (the Lyme disease bacterium), biofilm formation, and cellular oncology.
Her laboratory’s work explores how persistent bacterial structures and intracellular infections may influence host tissue environments, inflammatory pathways, and cancer cell behavior.
1. Borrelia Burgdorferi And Breast Cancer Research
Dr. Sapi’s laboratory investigated potential interactions between Borrelia burgdorferi and mammalian breast tissue, examining both clinical tissue specimens and cell culture models:
Detection in Tissue Samples: Preliminary studies by her group evaluated human breast cancer tissue samples alongside healthy controls and benign fibroadenomas. Their research reported finding evidence of Borrelia burgdorferi spirochetes and biofilm-like aggregates within a subset of breast cancer tissues, whereas normal control tissues tested negative.
Impact on Cancer Cell Invasiveness: In in vitro experiments exposing breast cancer cell lines to Borrelia burgdorferi, her team observed increased invasive behavior in the infected cells compared to uninfected controls.
Alterations in MicroRNA and Inflammatory Markers: Her laboratory analyzed how Borrelia infection alters host cell signaling, demonstrating changes in microRNA (miRNA) expression profiles and up-regulation of specific inflammatory cytokines in breast epithelial and cancer cells.
2. Biofilm Discovery And Borrelial Lymphocytoma
Dr. Sapi is prominently recognized for her pioneer work on Borrelia biofilms, which has implications for both persistent infection and localized skin lesions:
In Vivo Biofilm Evidence: Her team published findings demonstrating that Borrelia burgdorferi forms protective multicellular biofilm structures in human skin lesions known as Borrelial lymphocytoma (a benign B-cell lymphoproliferative skin response to Lyme disease).
Antibiotic Resistance and Persistence: Her research showed that when Borrelia exists inside a biofilm matrix (composed of alginate, calcium, and extracellular DNA), it exhibits significantly higher resistance to standard antimicrobial agents compared to its free-swimming spirochetal form.
3. Broader Implications Of Her Work
Dr. Sapi’s findings contribute to a growing area of medical research investigating how chronic bacterial infections and persistent biofilms might alter local tissue microenvironments. While further large-scale clinical trials are ongoing in the scientific community to fully elucidate any causal links, her work highlights important mechanisms:
Chronic Localized Inflammation: Biofilms create a continuous focus of immune activation, driving localized cytokine release that can alter cell behavior over long periods.
Intracellular and Matrix Niches: Demonstrating that Borrelia can reside intracellularly or within complex matrices provides insight into how pathogens survive standard antibiotic protocols and potentially interact with tumor microenvironments.