在 pododermatitis aseptica hemorrhagica circumscripta 的发病过程中,对无菌组织损伤的分子证据与表皮-皮肤平衡受损有关
T L Reeder1, D S Zarlenga2, R M Dyer1
1Department of Animal and Food Sciences, College of Agriculture and Natural Resources, University of Delaware, Newark, DE 19717.
Journal of dairy science
|June 2, 2024
概括
皮下无菌性血液循环炎 (PAHC) 涉及到削弱的爪子结构和缺陷的角生产. 这项研究发现,PAHC破坏了表皮平衡信号通路,影响了爪角的质量和修复.
科学领域:
- 兽医皮肤病学 兽医皮肤病学
- 分子生物学分子生物学
- 动物科学动物科学
背景情况:
- 皮下无菌性出血环形炎 (PAHC) 的特点是爪角缺陷和结构衰弱.
- 金属蛋白酶2涉及到远端 phalangeal 悬浮结构和远端 phalangex 沉没的削弱.
- 结核 flexorium 的压力导致组织损伤和异常的角生产受影响的爪子.
研究的目的:
- 研究MAPK/ERK信号级联在PAHC中无菌炎症反应中的作用.
- 评估与炎症相关的目标基因的变化,MAPK/ERK信号传递和受影响的牛爪的表皮平衡.
- 评估基因表达的变化,支持PAHC病变的表皮增殖和分化.
主要方法:
- 基因表达分析使用实时PCR对具有或没有PAHC病变的霍尔施泰因奶牛的皮肤表皮和皮肤进行基因表达分析.
- 样本包括PAHC的侧爪,来自同一肢体的中间爪和正常的侧爪.
- 统计分析 (ANOVA,t测试) 用于比较不同爪型和条件之间的基因表达水平.
主要成果:
- 在PAHC病变中,生长因子,AP1转录元件,CMYC,细胞循环调节器和半球体蛋白的表达减少.
- 观察到细胞激素6,β1整体蛋白,金属蛋白酶2和9,IL1B和IL1B抑制剂的表达增加.
- 来自受影响四肢的中部爪子显示MAPK/ERK途径元素和下游目标的类似,但不那么明显的减少.
结论:
- PAHC与MAPK/ERK信号通路的显著扰乱有关,影响表皮平衡和爪角生产.
- 观察到的基因表达变化表明受影响爪子的伤口修复和角再生能力受损.
- 无菌炎症作为PAHC中这些分子变化的原因或后果的确切作用需要进一步调查.
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