在空气-液体界面角膜上皮质屏障上,PACAP对高葡萄糖诱导的炎症的保护作用
Grazia Maugeri1, Agata Grazia D'Amico2, Nicoletta Palmeri1
1Section of Anatomy, Histology and Movement Sciences, Department of Biomedical and Biotechnological Sciences, University of Catania, Catania 95123, Italy.
下垂体腺酸环酶激活聚 (PACAP) 减少炎症,并改善角膜屏障厚度在糖尿病角质病变模型. 这种显示出治疗这种糖尿病相关的眼睛疾病的治疗潜力.
科学领域:
- 眼科医生 眼科 眼科
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
背景情况:
- 糖尿病角膜病变 (DK) 是糖尿病 (DM) 的一种常见但经常被忽视的眼部并发症.
- DK涉及角膜损伤,炎症,表皮屏障功能受损和伤口愈合延迟.
- 目前用于DK的治疗方法在有效恢复角膜功能方面存在局限性.
研究的目的:
- 研究 pituitary adenylate cyclase-activating polypeptide (PACAP) 的治疗潜力,以减轻糖尿病角质炎症中高血糖引起的炎症.
- 评估PACAP对角膜上皮质屏障完整性和炎症标志物的影响,在一个新的DK模型中.
主要方法:
- 在高葡萄糖条件下建立了角膜上皮细胞的空气-液体接口 (ALI) 培养模型,以模仿糖尿病角膜病变 (DK).
- 通过评估屏障厚度和炎症标志物 (IL-1β,TNF-α,p-NF-kB) 来证实模型的有效性.
- 分析了PACAP治疗对炎症和上皮形状学的影响.
主要成果:
- DK模型成功地复制了关键的病理特征,包括降低屏障厚度和升高的炎症.
- PACAP治疗显著降低了促炎性细胞因子IL-1β和TNF-α的水平.
- PACAP抑制了NF-kB的激活,改善了角膜上皮形态和屏障厚度.
结论:
- 在糖尿病角膜病变的临床前模型中,PACAP显示出显著的抗炎作用,并改善角膜屏障功能.
- 这些发现表明,PACAP在治疗糖尿病角膜病变和糖尿病患者的相关角膜并发症方面具有治疗前景.
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