Nociceptive TRP channels function as molecular target for several antifungal drugs

IF 2.1 4区 医学 Q3 PHARMACOLOGY & PHARMACY
Shota Okabe, Kenji Takahashi, Miho Hashimoto, Toshio Ohta
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引用次数: 0

Abstract

Background/objectives

Topically applied antifungal agents can induce adverse effects, such as pain and irritation. The transient receptor potential (TRP) channels—TRPA1 and TRPV1—mainly expressed in sensory neurons, act as sensors for detecting irritants. This study aims to evaluate the involvement of nociceptive channels in topical antifungal-induced pain and irritation. We tested nine topical antifungals belonging five classes: isoconazole, econazole, miconazole, clotrimazole, and ketoconazole as imidazoles; liranaftate as a thiocarbamate; terbinafine as an allylamine; amorolfine as a morpholine; and butenafine as a benzylamine.

Methods

Intracellular calcium concentrations ([Ca2+]i) and membrane currents in response to antifungals were measured to estimate channel activity using heterologously expressing cells and isolated mouse sensory neurons.

Results

In mouse TRPA1-expressing cells, all the tested drugs induced an increase in [Ca2+]i, which was abrogated or reduced by a TRPA1 blocker. Although many drugs evoked the TRPA1-nonspecific [Ca2+]i response at high concentrations, responses to clotrimazole, ketoconazole, and liranaftate were TRPA1 specific and elicited current responses in TRPA1-expressing cells. In mouse TRPV1-expressing cells, clotrimazole and ketoconazole elicited [Ca2+]i and current responses. In mouse sensory neurons, liranaftate-induced increase in [Ca2+]i was abrogated by a TRPA1 blocker and Trpa1 deletion. Responses to ketoconazole were inhibited by TRPA1 and TRPV1 blockers and by the genetic deletion of either channel.

Conclusion

These results suggest that topical antifungal-induced pain and irritation are attributable to the activation of nociceptive TRPA1 and/or TRPV1 channel/s. Consequently, caution should be exercised in the use of topical antifungals with symptoms of pain.

Abstract Image

痛觉 TRP 通道是几种抗真菌药物的分子靶点。
背景/目的:局部使用抗真菌剂会引起疼痛和刺激等不良反应。瞬时受体电位(TRP)通道--TRPA1 和 TRPV1--主要在感觉神经元中表达,是检测刺激物的传感器。本研究旨在评估局部抗真菌引起的疼痛和刺激中痛觉通道的参与情况。我们测试了属于五类的九种外用抗真菌药:咪唑类的异康唑、益康唑、咪康唑、克霉唑和酮康唑;硫代氨基甲酸酯类的利拉那酯;烯丙基胺类的特比萘芬;吗啉类的阿莫罗芬;以及苄胺类的丁烯那芬:方法:使用异源表达细胞和分离的小鼠感觉神经元测量细胞内钙浓度([Ca2+]i)和膜电流对抗真菌药物的反应,以估计通道活性:结果:在小鼠 TRPA1 表达细胞中,所有测试药物都会诱导[Ca2+]i 的增加,而 TRPA1 阻断剂会减弱或降低[Ca2+]i 的增加。虽然许多药物在高浓度下会诱发 TRPA1 非特异性 [Ca2+]i 反应,但克霉唑、酮康唑和利拉那酯对 TRPA1 的反应是特异性的,并在表达 TRPA1 的细胞中诱发电流反应。在小鼠表达 TRPV1 的细胞中,克霉唑和酮康唑引起[Ca2+]i 和电流反应。在小鼠感觉神经元中,TRPA1 阻断剂和 Trpa1 基因缺失可抑制利拉伐酸诱导的[Ca2+]i 增加。对酮康唑的反应受到 TRPA1 和 TRPV1 阻断剂以及任一通道基因缺失的抑制:这些结果表明,局部抗真菌引起的疼痛和刺激可归因于痛觉 TRPA1 和/或 TRPV1 通道的激活。因此,出现疼痛症状时应谨慎使用外用抗真菌药。
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来源期刊
CiteScore
5.30
自引率
6.90%
发文量
111
审稿时长
6-12 weeks
期刊介绍: Fundamental & Clinical Pharmacology publishes reports describing important and novel developments in fundamental as well as clinical research relevant to drug therapy. Original articles, short communications and reviews are published on all aspects of experimental and clinical pharmacology including: Antimicrobial, Antiviral Agents Autonomic Pharmacology Cardiovascular Pharmacology Cellular Pharmacology Clinical Trials Endocrinopharmacology Gene Therapy Inflammation, Immunopharmacology Lipids, Atherosclerosis Liver and G-I Tract Pharmacology Metabolism, Pharmacokinetics Neuropharmacology Neuropsychopharmacology Oncopharmacology Pediatric Pharmacology Development Pharmacoeconomics Pharmacoepidemiology Pharmacogenetics, Pharmacogenomics Pharmacovigilance Pulmonary Pharmacology Receptors, Signal Transduction Renal Pharmacology Thrombosis and Hemostasis Toxicopharmacology Clinical research, including clinical studies and clinical trials, may cover disciplines such as pharmacokinetics, pharmacodynamics, pharmacovigilance, pharmacoepidemiology, pharmacogenomics and pharmacoeconomics. Basic research articles from fields such as physiology and molecular biology which contribute to an understanding of drug therapy are also welcomed.
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