Journal: Pharmaceuticals
Article Title: Cardioprotective Effect of Flibanserin against Isoproterenol-Induced Myocardial Infarction in Female Rats: Role of Cardiac 5-HT2A Receptor Gene/5-HT/Ca 2+ Pathway
doi: 10.3390/ph16040502
Figure Lengend Snippet: Histopathological examination in the different treated groups. ( A ): Photomicrograph for specimens from the heart stained with H&E 10× & 40× in different treated groups. In the normal group: [H&E 10×] shows Compact, uniformly arranged myocardial fibers (Black arrows), [H&E 40×] myocytes show preserved uniform nuclei (Black arrows) and cytoplasmic cross striation (Red arrows). In ISO group: [H&E 10×] shows a wide separation of myocardial fibers due to interstitial edema (Black arrows), areas of myocardial fibers loss of eosinophilic staining and becoming pallor in appearance (Arrowheads), the influx of inflammatory cells into myocardial fibers (Red arrows), [H&E 40×] shows pathological changes of MI, interstitial edema between myocardial fibers (Black arrows), loss of cytoplasmic striation of myocytes with shrinkage of nuclei and prominence of the cell membrane (Arrowheads), some myocytes show an absence of nuclei (Yellow arrows), the influx of macrophages, indicating an inflammatory response to remove dead fibers (Red arrows). In FLP (15 mg/kg) + ISO group: [H&E 10×] shows no significant difference when compared to the ISO group as there is still a wide separation of myocardial fibers due to interstitial edema (Black arrows), the influx of inflammatory cells into myocardial fibers (Red arrows), [H&E 40×] shows persistent pathological changes of MI, interstitial edema between myocardial fibers (Black arrows), loss of cytoplasmic striation of myocytes with shrinkage of nuclei and prominence of the cell membrane (Arrowheads), some myocytes show an absence of nuclei (Yellow arrows), the influx of macrophages indicating an inflammatory response to remove dead fibers (Red arrows). In FLP (30 mg/kg) + ISO group: [H&E 10×] still shows interstitial edema (Black arrows); however, a slight reduction in inflammatory cell influx is noticed (Red arrow), [H&E 40×] shows persistent pathological changes of MI, yet to a milder degree: interstitial edema between myocardial fibers (Black arrows), loss of cytoplasmic striation of few myocytes with shrinkage of nuclei and prominence of the cell membrane (Arrowheads), absence of nuclei in few myocytes (Yellow arrows), reduction in macrophages influx (Red arrows). In FLP (45 mg/kg) + ISO group: [H&E 10×] shows compact uniformly arranged myocardial fibers and absence of interstitial edema (Black arrows); few areas of chronic inflammatory cells are seen (Red arrow), [H&E 40×] myocytes show uniform nuclei and eosinophilic cytoplasm (Black arrows), few macrophages are seen (Red arrows). ( B ): histopathologic score in experimental rats pretreated with FLP (15, 30, and 45 mg/kg) in an ISO-induced MI model. Data were analyzed using Kruskal-Wallis followed by Dunn’s test for multiple comparisons against the normal group at p < 0.05., ** p < 0.01, *** p < 0.001, n = 6. H&E = hematoxylin and eosin, FLP = flibanserin, ISO = isoproterenol, MI = myocardial infarction.
Article Snippet: Flibanserin was purchased from Rameda (Giza, Egypt) and was suspended in water.
Techniques: Staining, Membrane