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- W1499683542 abstract "Abstract Introduction Erectile dysfunction is highly prevalent in patients with advanced age or cardiovascular disease risk factors (CVDRFs). These conditions interfere on expression of vascular growth factors and respective receptors causing disturbance in endothelial function. Aim This study aims to assess the effect of aging and CVDRF on the expression of tyrosine kinase with immunoglobulin-like and EGF-like domains (Tie) 1 in human corpus cavernosum (CC). Methods CC fragments obtained from programmed surgeries or organ donors were divided into three groups: young, healthy aged, and aged with CVDRF. Angiopoietin (Ang) 1, Ang2, Tie1, and Tie2 mRNA and protein levels were assessed by real-time polymerase chain reaction and Western blotting, respectively. Dual-immunolabeling of Tie1 with specific markers of endothelium and smooth muscle and Ang1 and Ang2 was performed. Main Outcome Measures To characterize the expression of Tie1 in human CC and elucidate its potential inhibitory effect in Ang–Tie2 system. Results Analysis of mRNAs demonstrated a decrease in Tie1 expression in CVDRF individuals compared with aged or young healthy individuals. No variation for Tie2, Ang1, or Ang2 expression was observed among the studied groups. In all analyzed CC fragments, a 125 kDa band, Tie1, was detected. This protein presented a significant age-related decrease, specially in individuals with CVDRF. Immunofluorescence study revealed Tie1 expression in the endothelium of samples of all experimental groups. Conclusions Employing different methodological approaches, we show for the first time that Tie1 is expressed in human CC endothelium, and its level of expression diminishes in aged individuals, particularly those with CVDRF. This finding reinforces the view that delivery of Ang1 to the CC of erectile dysfunction affected CVDRF patients is able to activate a beneficial Tie2 response." @default.
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- W1499683542 date "2015-04-01" @default.
- W1499683542 modified "2023-10-18" @default.
- W1499683542 title "Effect of Aging and Cardiovascular Risk Factors on Receptor Tie1 Expression in Human Erectile Tissue" @default.
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- W1499683542 doi "https://doi.org/10.1111/jsm.12794" @default.
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