cis-Urocanic acid 是一种 5-HT2A 受体激动剂,具有较高的亲和力与 5-HT 受体结合(Kd 值为 4.6 nM)。它也是一种免疫调节剂,通过与 5-HT2A 受体结合诱导免疫抑制。
靶点5-HT2A Receptor
体外研究100 μg/mL cis-Urocanic acid (cis-UCA) 处理完全抑制了 IL-6 和 IL-8 的分泌,减少了 caspase-3 活性,并改善了 UV-B 照射下细胞的存活率。在两种细胞类型中,100 μg/mL cis-Urocanic acid 在非照射细胞中均未观察到对 IL-6 或 IL-8 分泌、caspase-3 活性或存活率的显著影响。5,000 μg/mL 浓度则表现出毒性。
细胞活力测定细胞系 | 人角膜上皮细胞 (HCE-2) 和人结膜上皮细胞 (HCECs) |
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浓度 | 10, 100, 1,000, 和 5,000 μg/mL |
培养时间 | 24、48 或 72 小时 |
结果 | 100 μg/mL 的处理完全抑制了 IL-6 和 IL-8 的分泌,减少了 caspase-3 活性,并改善了 UV-B 照射下细胞的存活率。两种细胞类型中均未观察到对非照射细胞的 IL-6 或 IL-8 分泌、caspase-3 活性和存活率的显著影响。 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
反式尿刊酸 | urocanic Acid | 3465-72-3 | C6H6N2O2 | 138.126 |
—— | cis-methyl urocanate | 88181-49-1 | C7H8N2O2 | 152.153 |
3-(1H-咪唑-4-基)-2-丙烯酸甲酯 | (E)-methyl 3-(1H-imidazol-4-yl)acrylate | 70346-51-9 | C7H8N2O2 | 152.153 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
反式尿刊酸 | urocanic Acid | 3465-72-3 | C6H6N2O2 | 138.126 |
The search for effective inhibitors of transdermal drug-induced contact sensitization was directed to dermal mast-cell-degranulating agents (MCDA). Human skin organ cultures were employed to test whether <i>cis</i>-urocanic acid (C-UA) and other potential MCDAs cause mast cell degranulation. These were then tested for their ability to inhibit the induction phase of the contact hypersensitivity reaction (CHR). C-UA at 1 μg/ml significantly depleted mast cell chymase, whereas <i>trans</i>-urocanic acid (T-UA) was relatively ineffective. C-UA, but not T-UA, induced local effects of liberated mast cell TNF-α, as detected by E-selectin expression on the microvascular dermal endothelium. C-UA significantly reduced (>70%) the ear swelling response in Balb/c mice, when applied 24 h prior to application of a sensitizing amount of dinitrochlorobenzene (DNCB), and induced a prolonged (>3 weeks) state of immune tolerance (>40%). Similar effects on local immunosuppression of CHR were observed with topical chloroquine and capsaicin, while cromolyn, a mast cell membrane stabilizer, was unable to inhibit DNCB-induced CHR. It is suggested that MCDAs may interfere with downstream events associated with accessory cell function.