Physiology Department, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt.
Forensic Medicine and Toxicology Department, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, Egypt.
Environ Sci Pollut Res Int. 2020 Nov;27(32):40757-40768. doi: 10.1007/s11356-020-10042-5. Epub 2020 Jul 15.
Platelet-rich plasma (PRP) composites of various cytokines and growth factors which have the potential to activate and speed the process of wound repair. Sildenafil also is a potent stimulator of angiogenesis which favors its potential effects on wound healing in several models. Existing work planned to examine the effectiveness of topical application of PRP and/or sildenafil citrate hydrogel (SCH) in a non-splinted excision skin wound model. Adult male rats were allocated into control, PRP, SCH, and PRP/SCH groups. On the 7th and 14th days, blood and tissue samples were collected for hematobiochemical, histopathological, and immunohistochemistry analyses. PRP and/or SCH topical treatments caused an enhancement of wound healing parameters, including a rapid switch from inflammatory phase to connective tissue stage evident by less systemic hematological changes and decreased values of proinflammatory cytokines (IL-6, TNF-α, and IL-1β) and C-reactive protein (CRP) on the 7th or 14th days post-wounding. Also, tissue hydroxyproline, collagen, nitrite, and total protein contents were higher in therapeutically handled wounded rats. Histologically, PRP- and/or SCH-treated wounded rats exhibited less necrosis, inflammation, and fibrin with a higher level of granulation tissue formation on the 7th day post-wounding and abundant collagen remodeling, epithelization, and vascularization on the 14th day relative to control. Interestingly, combined PRP and SCH treatment was more efficient in wound healing scoring with less inflammation, more collagen remodeling, and more epithelization. Our findings confirm the effectiveness of PRP and/or SCH as a topical wound healing treatment, with better skin wound healing with their combination.
富含血小板的血浆 (PRP) 复合各种细胞因子和生长因子,具有激活和加速伤口修复过程的潜力。西地那非也是血管生成的有效刺激物,这有利于其在几种模型中对伤口愈合的潜在影响。现有工作计划研究 PRP 和/或枸橼酸西地那非水凝胶 (SCH) 在非夹板切除皮肤伤口模型中的局部应用的效果。成年雄性大鼠被分配到对照组、PRP 组、SCH 组和 PRP/SCH 组。在第 7 天和第 14 天,采集血液和组织样本进行血液生化、组织病理学和免疫组织化学分析。PRP 和/或 SCH 局部治疗导致伤口愈合参数的增强,包括从炎症期到结缔组织期的快速转变,这在第 7 天或第 14 天的全身性血液变化较小和促炎细胞因子(IL-6、TNF-α 和 IL-1β)和 C 反应蛋白(CRP)值降低时更为明显。此外,治疗性处理的创伤大鼠的组织羟脯氨酸、胶原蛋白、亚硝酸盐和总蛋白含量更高。组织学上,PRP 和/或 SCH 治疗的创伤大鼠在第 7 天表现出较少的坏死、炎症和纤维蛋白,肉芽组织形成水平较高,第 14 天胶原重塑、上皮化和血管化程度较高与对照组相比。有趣的是,PRP 和/或 SCH 的联合治疗在伤口愈合评分中更有效,炎症更少,胶原重塑更多,上皮化更多。我们的研究结果证实了 PRP 和/或 SCH 作为局部伤口愈合治疗的有效性,它们的组合具有更好的皮肤伤口愈合效果。