Journal
BIOMATERIALS
Volume 284, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biomaterials.2022.121520
Keywords
CaCO3 nanoparticles; Acidity-responsive; Natural capsaicin; TRPV1 activation; Ca2+ influx; Tumor therapy
Funding
- Science and Technology Major Project of Guangxi [Gui Ke AA18118046]
- National Key R&D Program of China [2016YFD0500706]
- National Natural Science Foundation of China [31750110464, 31950410755]
- Sci-tech Innovation Foundation of Huazhong Agriculture University [2662018PY024]
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A study introduces an acid-responsive CaCO3 nanoparticle loaded with capsaicin that can specifically activate TRPV1 channels and trigger tumor calcium ion therapy. The nanoparticles have excellent biocompatibility and show potential for important clinical applications.
Capsaicin is a natural non-toxic small molecular organic substance, which is often used clinically to reduce inflammation and pain. Here, we report an acid-responsive CaCO3 nanoparticle loaded with capsaicin that can specifically activate TRPV1 channels and trigger tumor calcium ion therapy. The excellent acid responsiveness of calcium carbonate enables it to precisely target the tumor sites. The released capsaicin can specifically activate TRPV1 channel, overloading the intracellular calcium ion concentration and causing cell apoptosis, which provides a new safer and cheaper treatment. We proved that the naturalness and non-toxicity of capsaicin make the CaCO3@CAP nanoparticles have excellent biocompatibility, which has good development prospects and clinical application potential.
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