胸膜流体淋巴蛋白 (TSLP) 被人类母细胞酸酶和化学酶切割
Luisa Canè1,2,3, Remo Poto1,2, Francesco Palestra1,2
1Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.
International journal of molecular sciences
|April 13, 2024
概括
乳腺细胞蛋白酶三酶和基酶将乳腺层淋巴蛋白 (TSLP) 切割成碎片,而这些碎片不会激活人类肺巨细胞 (HLMs). 长形式的TSLP (lfTSLP) 激活HLMs释放VEGF-A. 这种形式的TSLP会激活HLMs释放VEGF-A.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 胸膜 stromal 淋巴蛋白 (TSLP) 是喘发病的一个关键细胞因子.
- TSLP存在于长形式 (lfTSLP) 和短形式 (sfTSLP) 的变体.
- 人类肺巨细胞 (HLMs) 和巨细胞 (HLMCs) 在喘中至关重要,并在肺中相互作用.
研究的目的:
- 为了研究巨细胞蛋白酶 (三酶和基酶) 对TSLP的蛋白解效应.
- 为了确定这些蛋白酶产生的TSLP碎片是否可以激活HLMs.
- 评估TSLP及其碎片在诱导HLMs的血管新生因子释放中的作用.
主要方法:
- 质谱法 (MS) 用于识别TSLP裂部位.
- 重组的人类TSLP用重组三酶和化学酶治疗.
- 用TSLP及其碎片刺激HLM,以测量血管新生因子释放.
主要成果:
- 三酶将TSLP切割成1-97 和 98-132 片段.
- 化学酶将TSLP切割成1-36和37-132个碎片.
- 如果TSLP诱导了HLMs的VEGF-A释放,但TSLP碎片没有激活HLMs.
结论:
- 乳腺细胞蛋白酶产生TSLP碎片,在HLM上没有激活性质.
- 如果TSLP,而不是它的碎片,诱导HLMs的血管原因子释放.
- 这项研究揭示了巨细胞蛋白酶和TSLP在喘病理生物学中的新型相互作用.
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