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LL37's antiviral capabilities are particularly outstanding. The research group led by Zhang Conggang at Tsinghua University discovered that it can act as a highly efficient transporter of the "immune messenger" cGAMP, bidirectionally transmitting immune signals across the membrane, strongly activating the STING pathway and interferon-mediated antiviral responses, and almost completely eliminating intracellular viruses. This discovery also unravels the molecular mystery of vitamin D's antiviral effects-it exerts its effects by inducing LL37 expression. Clinical studies have also confirmed that oral administration of LL37 has a significant inhibitory effect on the Omeprone variant.https://www.fiercerawsource.com/peptides/premium-high-purity-peptides-ll37.html
In the field of antitumor therapy, research by the Charles Sturt University team shows that LL37 can participate in the entire process of in vitro dendritic cell preparation, significantly enhancing the tumor-killing activity of CD8+ T cells, while downregulating PD-1 expression and enhancing the efficacy of immunotherapy. Currently, related technologies have become a potential new tool for cancer cell immunotherapy.
Tissue repair and organ protection are another important advantage of LL37. Research at Yantai Yuhuangding Hospital shows that it promotes angiogenesis through the VEGFA-PI3K/AKT/mTOR pathway, effectively improving lower limb ischemia symptoms. Clinical trials have confirmed that topical application of LL37 can reduce the area of refractory venous ulcers by 68%, while LL37 formulations encapsulated in keratin hydrogel can further accelerate full-thickness wound healing. In addition, it can inhibit alveolar epithelial cell pyroptosis, improve septic lung injury, and protect the intestinal barrier function in patients with heatstroke.
From a natural immune defense line to a precision therapeutic target, the multiple benefits of LL37 are being continuously explored. With the optimization of delivery technology, its clinical applications in infectious diseases, tumors, and chronic wounds are expected to expand further.
