• Paul Levesque posted an update 1 week, 3 days ago

    Myrtus communis has anti-inflammatory, neuroprotective and anticholinesterase activities yet there have been limited studies examining effects of Myrtus communis on cognitive functions. This study investigated the possible effects of Myrtus communis on changes in the cognitive functions of experimental renovascular hypertensive rats. Fifty-six Wistar-Albino rats were equally divided into 4 groups; sham-operated control, renovascular hypertension (RVH), ramipril (RVH + Ram) and Myrtus communis extract (RVH + MC) treatment groups. Goldblatt’s 2-kidney 1-clip (2K1C) method was used to induce RVH. At the end of 9 weeks of treatment, after blood pressure recording, the animals underwent new object recognition test and Morris water maze (MWM) task. Following these tests, blood brain barrier (BBB) integrity was examined in 6 animals from each group. In the others after decapitation, osteopontin and interleukin (IL)-10 levels were measured in blood samples; while matrix metalloproteinase (MMP)-13, sodium potassium adstudy suggest that Myrtus communis extract may improve the cognitive dysfunctions in hypertension through antihypertensive, anti-inflammatory and anticholinesterase activities.Gastrointestinal bleeding (GIB) still presents a demanding situation with high morbidity and mortality rates; thus hemostatic powders such as EndoClot (EC) have been developed to improve endoscopic armament. The aim of the present study was to determine which indications triggered the application of EC and to assess resulting hemostasis rates. Forty three patients undergoing endoscopical procedures in three hospitals; two tertiary care and one university hospital, were included. EC was applied in 48 endoscopies in 43 patients (27 male, age 65.5 years, range 28 – 92 years) following four different indications. EC was used in active GIB as rescue or first-line therapy giving a short-term and long-term hemostasis in 13/17 patients (76.5%). In the setting of non-active GIB, following conventionally achieved hemostasis or endoscopic interventions, EC was found to prevent bleeding in 19/21 patients (90.4%). p38 MAPK inhibitor EC induced hemostasis in 8/10 patients (80%) with impaired coagulation. EC failures resulted from tumor bleeding, Forrest I lesions or perforated duodenal ulcers. No major adverse events were recorded and one technical failure (2.1%) occurred. EC was applied as first line or salvage treatment in ongoing bleedings with promising results. Furthermore, EC was used after successful hemostasis or following endoscopic interventions to further reduce re-bleeding rates. We saw promising results in all indications, albeit lacking a control group.Prenatal treatment with magnesium sulfate (MgSO4) has neuroprotective effects in very preterm infants but its use has been associated with an increased rate of patent ductus arteriosus (DA). MgSO4 is a vasodilator and thus may exert a direct relaxant effect in the DA. We aimed to investigate the vasoactive effects of MgSO4 in the DA using the chicken embryo as experimental model. DA rings from 15-d (E15), 17-d (E17) and 19-d (E19) chicken embryos (total incubation 21-d) were mounted in a wire myograph for isometric tension recordings. Exposure of DA rings to 21% O2 induced a tonic contraction which was relaxed by MgSO4 (2.4 – 7.2 mmol L-1) in a concentration-dependent manner (mean maximal relaxation E19 51.4%, SE 6.3; EC50 3.5 mmol L-1, SE 0.7). The relaxation evoked by MgSO4 was not significantly different between E15, E17 and E19 DA and was not affected by removal of the endothelium or by the presence of the nitric oxide synthase inhibitor L-NAME, the soluble guanylate cyclase inhibitor ODQ, or the cyclooxygenase inhibitor indomethacin. In contrast, when the DA rings were incubated in Ca2+-free solution, or in the presence of inhibitors of L-type Ca2+ channels (nifedipine), or large-conductance Ca2+-activated K+ (BKCa) channels (iberiotoxin), MgSO4-induced relaxation was impaired. Preincubation of the DA rings with MgSO4 concentrations ranging from 0 to 6.0 mmol L-1 did not significantly affect O2-induced contraction that was only impaired by a concentration of 7.2 mmol L-1. In conclusion, MgSO4 induced endothelium-independent relaxation of chicken DA and this relaxation appeared to be mediated through stimulation of BKCa channels and blockade of transmembrane flux of extracellular Ca2+. However, O2-induced DA contraction was only impaired by suprapharmacological concentrations of MgSO4 (> 6.0 mmol L-1). Therefore, our data suggest that the higher incidence of patent DA in preterm infants exposed to MgSO4 is unlikely to be due to a direct pharmacological effect of the drug on the DA.The mechanisms behind the cardiovascular and renal benefits of empagliflozin is not fully understood. The positive impact of the medication on cardiovascular mortality can not be solely attributed to its antidiabetic effect, with a metabolic mechanism possibly involved. To investigate the metabolic effects of empagliflozin treatment (10 mg/kg/day for 6 weeks), we used an adult male rat model with serious vascular complications associated with metabolic syndrome and prediabetes. Impaired glucose tolerance, severe albuminuria and impaired insulin sensitivity were induced by intragastric administration of methylglyoxal and high sucrose diet feeding for four months. Although empagliflozin decreased body weight, non-fasting glucose and insulin, glucagon levels remained unchanged. In addition, empagliflozin increased adiponectin levels (+40%; p less then 0.01) and improved skeletal muscle insulin sensitivity. Increased non-esterified fatty acids (NEFA) in empagliflozin-treated rats is understood to generate keton Improved oxidative and dicarbonyl stress and decreased uric acid are also possibly involved in the cardio- and reno-protective effects of empagliflozin.Phosphorylation of amino acid residues of extracellular signal-regulated kinases (ERK), p38 and c-Jun N-terminal kinases (JNK) contributes to the initiation of complex pathways of intracellular signal transduction, which play a role in the development of excitotoxicity, which is important in pathogenesis both in diabetes and neurodegeneration. Due to reports on the relationship between these two diseases, it is important to explore pathways in the coexistence of both of them. This study investigated ERK, p38 and JNK protein kinases phosphorylation changes in diabetic in vitro conditions with accompanying excitotoxicity reflected by high L-glutamate concentrations. An InstantOne ELISA test in cell lysates was performed to evaluate the intensity of phosphorylation of ERK, p38 and JNK occurring as a result of the incubation of undifferentiated PC12 cells with solutions of glucose (G1,G2), insulin (I1,I2) and L-glutamate (L1,L2). We observed increased phosphorylation of JNK (Thr183/Tyr185) and p38 (Thr180/Tyr182) kinases.