Lentinus tigrinus immunomodulatory protein (FIP-Lti)

Lentinus tigrinus immunomodulatory protein (FIP-Lti), often referred to as LTh in specific literature, is a member of the fungal immunomodulatory protein (FIP) family derived from the mushroom Lentinus tigrinus. These proteins are structurally similar to the variable region of immunoglobulin heavy chains and are known for their potent ability to modulate the host immune system. FIP-Lti exhibits hemagglutinating activity and can stimulate the proliferation of lymphocytes while inducing the expression of Th1-type cytokines like IFN-γ. In a therapeutic context, FIP-Lti is investigated for its potential anti-tumor and adjuvant properties, as it can enhance the body's natural immune surveillance against malignant cells. While it is not yet an approved drug, its ability to bridge innate and adaptive immunity makes it a target of interest for immunotherapy and vaccine development. Challenges in its clinical application include managing potential over-activation of the immune system and ensuring protein stability and low immunogenicity during delivery.

Other names

LThLentinus tigrinus hemagglutininFungal immunomodulatory protein from Lentinus tigrinusLti-FIP

FIP-Lti acts as an immunomodulator by stimulating the proliferation of peripheral blood mononuclear cells (PBMCs) and inducing the secretion of various cytokines, such as interferon-gamma (IFN-γ) and interleukin-2 (IL-2). It typically functions by cross-linking cell surface receptors, similar to other fungal immunomodulatory proteins, which triggers intracellular signaling pathways involved in immune activation and potential anti-tumor responses.