Testosterone to estrogen conversion is not responsible for the vasodilating effects of testosterone ex vivo.

Testosterone to estrogen conversion is not responsible for the vasodilating effects of testosterone ex vivo. Cell Mol Biol (Noisy-le-grand). 2018 Jan 31;64(1):111-117 Authors: Tan S, Yi D, Zhu W, Sun R, Wei M Abstract Men have a higher incidence of cardiovascular disease, but poorer vasodilatation than women. However, testosterone exerts vasodilating actions ex vivo. We aimed to determine if reactive oxygen species (ROS) produced in vivo could cause 'eNOS uncoupling' that accounts for the disparity between in vivo and ex vivo results. Ovariectomized SHR and WKY rats were divided into 3 groups: untreated, estradiol benzoate (EB) treated, and testosterone propionate (TP) treated. EB and TP rats were treated for 8 weeks, and blood pressure, serum estrogen, progesterone, and testosterone were measured. Rats were euthanized and aorta samples were taken for examination of nitric oxide, phosphorylated eNOS (p-eNOS), H2O2, gr91phos, and pAkt. Mesenteric arterial rings were used in myographic studies of endothelium dependent and independent vasorelaxation. The influence of testosterone added to the bathing solution of rings from testosterone-supplemented rats with/without an eNOS inhibitor, with/without blockade of androgen or estrogen receptors, and with/without an inhibitor of gp91phox was examined. Treatment with testosterone for 8 weeks did not change endothelium-dependent relaxation in response to acetylcholine in the presence or absence of the eNOS inhibitor...
Source: Cellular and Molecular Biology - Category: Molecular Biology Tags: Cell Mol Biol (Noisy-le-grand) Source Type: research

Related Links:

Publication date: Available online 20 October 2018Source: Urology Case ReportsAuthor(s): Y. Ayari
Source: Urology Case Reports - Category: Urology & Nephrology Source Type: research
Publication date: Available online 20 October 2018Source: Urology Case ReportsAuthor(s): Vincent Khor, LIE Kwok Ying
Source: Urology Case Reports - Category: Urology & Nephrology Source Type: research
In this report, we looked at opioid medication use following discharge after radical prostatectomy. We found that 77% of opioid pain medication prescribed was unused, with 84% of patients using less than half of their prescription. Prescribing more opioids was associated with greater use; only 9% of patients appropriately disposed of leftover medication.
Source: European Urology - Category: Urology & Nephrology Source Type: research
Authors: Voulgaris A, Nena E, Steiropoulos P PMID: 30338831 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
Authors: Fisichella R, Benfatto S, Berretta S PMID: 30338830 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
Authors: Pintaudi B, Di Vieste G, Corrado F, Lucisano G, Giunta L, D'Anna R, Di Benedetto A Abstract OBJECTIVE: Myo-inositol supplementation prevents gestational diabetes (GDM) in women at risk and reduces insulin resistance in women with GDM. No data are available about its effect on glucose variability. The aim of this study was to evaluate the effects of a supplementation of myo-inositol on glucose variability in women with GDM. PATIENTS AND METHODS: Myo-inositol effect on glucose variability was studied in a pilot case-control study involving 12 consecutive pregnant women (median age 34 years, 25.0% insulin...
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
CONCLUSIONS: MiR-124 down-regulation was associated with renal cancer cell OS-RC-2 invasion enhancement. Over-expression of miR-124 attenuated OS-RC-2 cell invasion by down-regulating STAT3 and MMP-9. PMID: 30338828 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
CONCLUSIONS: We found that the majority of human milk samples included beta-lactams or quinolones, even though the mothers did not receive these antibiotics during pregnancy and lactation. Antibiotic residues in human milk may affect early maintenance of the intestinal microbiota. Previous studies have shown that antimicrobials in food might increase the risks of allergies and could lead to the development of antibiotic-resistant bacterial strains. Effective policies on food safety and appropriate antibiotic use during pregnancy and lactation are needed. PMID: 30338827 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
CONCLUSIONS: Cyclosporine protects HK-2 cells from inflammatory injury via regulating mTOR pathway. PMID: 30338826 [PubMed - in process]
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
Authors: Golino M, Spera FR, Manfredonia L, De Vita A, Di Franco A, Lamendola P, Villano A, Melita V, Mencarelli E, Lanza GA, Crea F Abstract OBJECTIVE: About one-third of patients undergoing percutaneous coronary interventions (PCIs) for flow-limiting coronary stenosis continue to develop signs of myocardial ischemia (MI) during exercise stress test [EST], despite successful coronary revascularization. Coronary microvascular dysfunction is a likely major cause of the persistence of EST-induced MI in these patients. PATIENTS AND METHODS: We studied 15 patients (14 men, age 67±5 years) fulfilling the foll...
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
More News: Biology | Cardiology | Cardiovascular | Estradiol | Heart | Molecular Biology | Study | Women