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AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse
BACKGROUND: Patients with diabetic erectile dysfunction (ED) usually respond poorly to oral phosphodiesterase-5 inhibitors due to a lack of bioavailable nitric oxide from severe endothelial and neural dysfunction. ProNGF and its receptor p75(NTR) are known to be up-regulated in diabetic condition an...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
AME Publishing Company
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6186664/ http://dx.doi.org/10.21037/tau.2018.AB088 |
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author | Minh, Nguyen Nhat Song, Kang-Moon Choi, Min-Ji Ghatak, Kalyan Kwon, Mi-Hye Yin, Guo Nan Ryu, Ji-Kan Suh, Jun-Kyu |
author_facet | Minh, Nguyen Nhat Song, Kang-Moon Choi, Min-Ji Ghatak, Kalyan Kwon, Mi-Hye Yin, Guo Nan Ryu, Ji-Kan Suh, Jun-Kyu |
author_sort | Minh, Nguyen Nhat |
collection | PubMed |
description | BACKGROUND: Patients with diabetic erectile dysfunction (ED) usually respond poorly to oral phosphodiesterase-5 inhibitors due to a lack of bioavailable nitric oxide from severe endothelial and neural dysfunction. ProNGF and its receptor p75(NTR) are known to be up-regulated in diabetic condition and to play important role in triggering neuronal survival and vascular cells apoptosis. The aim of this study was to investigate the role of proNGF/p75(NTR) signal pathway and the effectiveness of proNGF neutralizing antibody (proNGF-Ab) in restoring erectile function in streptozotocin-induced diabetic mouse. METHODS: Diabetes mellitus was induced by intraperitoneal injection of streptozotocin (50 mg/kg) into 8-week-old C57BL/6 male mice for 5 consecutive days. At 8 weeks after the induction of diabetes mellitus, the animals were distributed into 3 groups: controls, streptozotocin-induced diabetic mice receiving repeated intracavernous injections of saline (days −3 and 0; 20 µL) or proNGF-Ab (days −3 and 0; 20 µg in 20 µL of saline). We measured erectile function by electrical stimulation of the cavernous nerve at 2 weeks after treatment. The penis then was harvested for histological and biochemical studies. We also examined the effect of proNGF-Ab and p75(NTR) siRNA in primary cultured mouse cavernous endothelial cells, pericytes and major pelvic ganglion. RESULTS: The cavernous expression of proNGF and p75(NTR) was up-regulated in diabetic patients and STZ-induced diabetic mouse. Intracavernous injection of proNGF-Ab successfully restored erectile function in diabetic mice, which reach up to 90–100% of control values. ProNGF-Ab significantly increased cavernous endothelial cell content, pericytes content and endothelial cell-cell junction proteins; and restored neuronal cell content in the cavernous tissue of diabetic mice. Under the high glucose condition, proNGF-Ab and p75(NTR) siRNA also promoted tube formation in mouse cavernous endothelial cells and pericytes; decreased the apoptosis of endothelial cells and pericytes; and enhanced neurite sprouting in major pelvic ganglion culture. CONCLUSIONS: Our findings suggest that inhibition of proNGF/p75(NTR) signal pathway is a promising therapeutic strategy for diabetic ED. |
format | Online Article Text |
id | pubmed-6186664 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | AME Publishing Company |
record_format | MEDLINE/PubMed |
spelling | pubmed-61866642018-10-26 AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse Minh, Nguyen Nhat Song, Kang-Moon Choi, Min-Ji Ghatak, Kalyan Kwon, Mi-Hye Yin, Guo Nan Ryu, Ji-Kan Suh, Jun-Kyu Transl Androl Urol Printed Abstract BACKGROUND: Patients with diabetic erectile dysfunction (ED) usually respond poorly to oral phosphodiesterase-5 inhibitors due to a lack of bioavailable nitric oxide from severe endothelial and neural dysfunction. ProNGF and its receptor p75(NTR) are known to be up-regulated in diabetic condition and to play important role in triggering neuronal survival and vascular cells apoptosis. The aim of this study was to investigate the role of proNGF/p75(NTR) signal pathway and the effectiveness of proNGF neutralizing antibody (proNGF-Ab) in restoring erectile function in streptozotocin-induced diabetic mouse. METHODS: Diabetes mellitus was induced by intraperitoneal injection of streptozotocin (50 mg/kg) into 8-week-old C57BL/6 male mice for 5 consecutive days. At 8 weeks after the induction of diabetes mellitus, the animals were distributed into 3 groups: controls, streptozotocin-induced diabetic mice receiving repeated intracavernous injections of saline (days −3 and 0; 20 µL) or proNGF-Ab (days −3 and 0; 20 µg in 20 µL of saline). We measured erectile function by electrical stimulation of the cavernous nerve at 2 weeks after treatment. The penis then was harvested for histological and biochemical studies. We also examined the effect of proNGF-Ab and p75(NTR) siRNA in primary cultured mouse cavernous endothelial cells, pericytes and major pelvic ganglion. RESULTS: The cavernous expression of proNGF and p75(NTR) was up-regulated in diabetic patients and STZ-induced diabetic mouse. Intracavernous injection of proNGF-Ab successfully restored erectile function in diabetic mice, which reach up to 90–100% of control values. ProNGF-Ab significantly increased cavernous endothelial cell content, pericytes content and endothelial cell-cell junction proteins; and restored neuronal cell content in the cavernous tissue of diabetic mice. Under the high glucose condition, proNGF-Ab and p75(NTR) siRNA also promoted tube formation in mouse cavernous endothelial cells and pericytes; decreased the apoptosis of endothelial cells and pericytes; and enhanced neurite sprouting in major pelvic ganglion culture. CONCLUSIONS: Our findings suggest that inhibition of proNGF/p75(NTR) signal pathway is a promising therapeutic strategy for diabetic ED. AME Publishing Company 2018-09 /pmc/articles/PMC6186664/ http://dx.doi.org/10.21037/tau.2018.AB088 Text en 2018 Translational Andrology and Urology. All rights reserved. |
spellingShingle | Printed Abstract Minh, Nguyen Nhat Song, Kang-Moon Choi, Min-Ji Ghatak, Kalyan Kwon, Mi-Hye Yin, Guo Nan Ryu, Ji-Kan Suh, Jun-Kyu AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse |
title | AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse |
title_full | AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse |
title_fullStr | AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse |
title_full_unstemmed | AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse |
title_short | AB088. Inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse |
title_sort | ab088. inhibition of prongf pathway restores erectile function through dual angiogenic and neurotrophic effects in the diabetic mouse |
topic | Printed Abstract |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6186664/ http://dx.doi.org/10.21037/tau.2018.AB088 |
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