Abstract
BackgroundThe possible mechanism(s) of inotropic and chronotropic effects of the extract from Rosa damascena (R. damascena) on heart was examined.MethodsInotropic and chronotropic effects of four concentrations of the extract from R. damascena and isoprenaline were examined in isolated guinea-pig hearts perfused through aorta in a Langendorff model. All measurements were performed in three different groups: 1) In the presence and absence of propranolol, 2) In the presence and absence of methacholine and 3) In the presence of diltiazem (n = 12 for each group).ResultsIn all groups both isoprenaline and the extract caused an increase in heart rate and contractility (p < 0.05 to p < 0.001). Only in group 1, the final concentration of isoprenaline in the absence of propranolol caused significant greater increase in heart rate compared to the extract (207.6 ± 11.0 compared to 162.6 ± 11.8, p < 0.01). The percent increase in heart contractility due to the final concentration of the extract in the absence (362.4 ± 36.9 compared to 227.7 ± 31.6, p < 0.01) and presence of propranolol (577.1 ± 62.9 compared to 357.5 ± 45.6, p < 0.001) in group 1 and absence (403.7 ± 42.1 compared to 244.8 ± 18.9, p < 0.005) and presence of methcholine (499.88 ± 64.64 compared to 323.90 ± 44.49, p < 0.05) in groups 2 was significantly greater than the increase caused by isoprenaline.ConclusionsThe results of this study suggest that inotropic and chornotropic effect of R. damascena is possibly due to the stimulatory effect of this plant on beta-adrenoceptors.
Highlights
Obesity has reached epidemic proportions and is still escalating at an alarming rate worldwide
Obesity is associated with chronic activation of low-grade inflammation [3], which is implicated in the pathogenesis of obesity-associated diseases including insulin resistance, type-2 diabetes (T2D) [4, 5] and cardiovascular disease [6, 7]
A numerous of studies has been shown that shortchain fatty acids (SCFAs) inhibit inflammation with focus on butyrate and to a lesser extent on acetate and Propionic Acid (PA), [16]
Summary
Obesity has reached epidemic proportions and is still escalating at an alarming rate worldwide. In Palestine the prevalence of obesity has been shown to be approximately 4. The etiology of obesity and low-grade inflammation is complex and involves intrinsic and extrinsic factors. The colonization of germ-free mice with microbiota derived from obese mice results in significantly greater adiposity than colonization with microbiota from lean mice [12]. Prebiotic diets such as fructans [13] are associated with general better health, including the decrease in body weight, fat mass and the severity of T2D [14,15,16]. The factors that influence the composition and metabolism of intestinal
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
