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Andrology

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https://www.readbyqxmd.com/read/28076881/constitutive-nos-uncoupling-and-nadph-oxidase-upregulation-in-the-penis-of-type-2-diabetic-men-with-erectile-dysfunction
#1
B Musicki, A L Burnett
Erectile dysfunction (ED) associated with type 2 diabetes mellitus (T2DM) involves dysfunctional nitric oxide (NO) signaling and increased oxidative stress in the penis. However, the mechanisms of endothelial NO synthase (eNOS) and neuronal NO synthase (nNOS) dysregulation, and the sources of oxidative stress, are not well defined, particularly at the human level. The objective of this study was to define whether uncoupled eNOS and nNOS, and NADPH oxidase upregulation, contribute to the pathogenesis of ED in T2DM men...
January 11, 2017: Andrology
https://www.readbyqxmd.com/read/28061524/prevalence-of-small-testicular-hyperechogenic-foci-in-subgroups-of-382-non-vasectomized-azoospermic-men-a-retrospective-cohort-study
#2
J Fedder
Testicular hyperechogenic foci (THF) are associated with Klinefelter's syndrome, cryptorchidism, infertility, and testicular germ cell neoplasia. The aims of the study were to evaluate THF in relation to etiology of azoospermia and to Sertoli cell dysfunction. The structures inside the scrotum of consecutive non-vasectomized, azoospermic were examined by ultrasonography, and hormone (FSH, LH, testosterone, and prolactin), and genetic analyses (karyotype, Y microdeletions, and CFTR mutations) were performed...
January 6, 2017: Andrology
https://www.readbyqxmd.com/read/27992972/protective-features-of-resveratrol-on-human-spermatozoa-cryopreservation-may-be-mediated-through-5-amp-activated-protein-kinase-activation
#3
M Shabani Nashtaei, F Amidi, M A Sedighi Gilani, A Aleyasin, Sh Bakhshalizadeh, M Naji, S Nekoonam
Biochemical and physical modifications during the freeze-thaw process adversely influence the restoration of energy-dependent sperm functions required for fertilization. Resveratrol, a phytoalexin, has been introduced to activate 5' AMP-activated protein kinase which is a cell energy sensor and a cell metabolism regulator. The cryoprotection of resveratrol on sperm cryoinjury via activation of AMP-activated protein kinase also remains to be elucidated. Our aim, thus, was to investigate: (i) the presence and intracellular localization of AMP-activated protein kinase protein; (ii) whether resveratrol may exert a protective effect on certain functional properties of fresh and post-thaw human spermatozoa through modulation of AMP-activated protein kinase...
December 19, 2016: Andrology
https://www.readbyqxmd.com/read/27992969/sexuality-and-fertility-in-men-with-hypospadias-improved-outcome
#4
L Örtqvist, M Fossum, M Andersson, A Nordenström, L Frisén, G Holmdahl, A Nordenskjöld
The aim of this study was to investigate sexual function and fertility in adult men born with hypospadias. Patients born with hypospadias, age-matched controls, and a group of circumcised men completed a questionnaire constructed to reflect their psychosexual situation and fertility. Core gender identity, sexual orientation, and gender role behavior was also assessed. 167 patients [63% distal, 24% mid shaft and 13% proximal, mean age 34 (19-54) years], 169 controls from the general population [mean age 33 (19-48) years] and 47 controls circumcised because of phimosis (mean age 26 [19-44]) participated and completed the questionnaire...
December 19, 2016: Andrology
https://www.readbyqxmd.com/read/27992968/establishment-of-in%C3%A2-vitro-model-of-erectile-dysfunction-for-the-study-of-high-glucose-induced-angiopathy-and-neuropathy
#5
G N Yin, S-H Park, K-M Song, A Limanjaya, K Ghatak, N N Minh, J Ock, J-K Ryu, J-K Suh
Penile erection requires complex interaction between vascular endothelial cells, smooth muscle cells, pericytes, and autonomic nerves. Diabetes mellitus is one of the most common causes of erectile dysfunction (ED) and multiple pathogenic factors, such as cavernous angiopathy and autonomic neuropathy, are associated with diabetic ED. Although a variety of animal models of diabetic ED play an important role in understanding pathophysiologic mechanisms of diabetes-induced ED, these animal models have limitations for addressing the exact cellular or molecular mechanisms involved in ED...
December 19, 2016: Andrology
https://www.readbyqxmd.com/read/27992945/inhibition-of-poly-adp-ribose-polymerase-may-have-preventive-potential-for-varicocoele-associated-testicular-damage-in-rats
#6
C Celik-Ozenci, N Kuscu, N E Gungor-Ordueri, A Tasatargil, P Sahin, H Durmus
Varicocele is ordinarily accompanied by testicular damage and male infertility. Several theories have been proposed to explain the detrimental effect of varicocele on testis tissue, including the possible effects of oxidative stress. The poly(ADP-ribose) polymerase (PARP) pathway has been established as a major downstream intracellular pathway of oxidative stress. Recently we have reported that PARP pathway has been activated in varicocele-induced rat testicular damage model. The aim of the present study was to investigate the possible protective effect of PARP inhibition in varicocele-associated testicular damage...
December 19, 2016: Andrology
https://www.readbyqxmd.com/read/27907978/comparison-of-the-single-dose-pharmacokinetics-pharmacodynamics-and-safety-of-two-novel-oral-formulations-of-dimethandrolone-undecanoate-dmau-a-potential-oral-male-contraceptive
#7
R Ayoub, S T Page, R S Swerdloff, P Y Liu, J K Amory, A Leung, L Hull, D Blithe, A Christy, J H Chao, W J Bremner, C Wang
Dimethandrolone (DMA, 7α,11β-dimethyl-19-nortestosterone) has both androgenic and progestational activities, ideal properties for a male hormonal contraceptive. In vivo, dimethandrolone undecanoate (DMAU) is hydrolyzed to DMA. We showed previously that single oral doses of DMAU powder in capsule taken with food are well tolerated and effective at suppressing both LH and testosterone (T), but absorption was low. We compared the pharmacokinetics and pharmacodynamics of two new formulations of DMAU, in castor oil and in self-emulsifying drug delivery systems (SEDDS), with the previously tested powder formulation...
December 1, 2016: Andrology
https://www.readbyqxmd.com/read/27860441/effects-of-human-chorionic-gonadotropin-on-testicular-interstitial-tissues-in-men-with-non-obstructive-azoospermia
#8
S Oka, K Shiraishi, H Matsuyama
Non-obstructive azoospermia is a severe condition because spermatogenesis per se is disrupted. Although microdissection testicular sperm extraction is the standard therapy for non-obstructive azoospermia, sperm retrieval is unsuccessful in approximately 50% of patients. For these patients, we conducted human chorionic gonadotropin-based salvage hormonal therapy, and sperm retrieval was possible in 10-20% of patients. The objectives of this study were to assess the changes in interstitial lesions in patients with non-obstructive azoospermia and to evaluate the effects of human chorionic gonadotropin on these tissues...
November 16, 2016: Andrology
https://www.readbyqxmd.com/read/27813361/high-serum-dihydrotestosterone-examined-by-ultrasensitive-lc-ms-ms-as-a-predictor-of-benign-prostatic-hyperplasia-or-gleason-score-6-cancer-in-men-with-prostate-specific-antigen-levels-of-3-10%C3%A2-ng-ml
#9
Y Miyoshi, H Uemura, K Suzuki, Y Shibata, S Honma, M Harada, Y Kubota
There has been no consensus on the role of serum androgen concentrations in prostate cancer detection in men with prostate-specific antigen levels of 3-10 ng/mL. In this study, testosterone and dihydrotestosterone concentrations in blood were examined by a newly developed method using ultrasensitive liquid chromatography with two serially linked mass spectrometers (LC-MS/MS). We investigated the correlation between serum androgen levels and Gleason scores at biopsy. We analyzed data of 157 men with a total prostate-specific antigen range of 3-10 ng/mL who underwent initial systematic prostate needle biopsy for suspected prostate cancer between April 2000 and July 2003...
November 3, 2016: Andrology
https://www.readbyqxmd.com/read/27813338/dutasteride-mediated-morphological-changes-in-the-genitourinary-tract-associated-with-altered-expression-patterns-of-the-androgen-and-estrogen-receptors-in-male-rats
#10
N Enatsu, K Chiba, K Sumii, T Fukuda, K Okada, K Matsushita, M Fujisawa
We evaluated the effects of dutasteride on the genitourinary tract using fifteen 8-week-old male Sprague-Dawley rats. Animals were divided into three groups comprising five animals each and treated as follows. Group A was a control group, members of Group B received oral administration of dutasteride 0.1 mg/kg/day from the age of 8 to 16 weeks, and members of Group C were castrated at the age of 8 weeks. All rats were killed at the age of 16 weeks for the sample collection of blood, bladder, prostate, seminal vesicles, and penis...
November 3, 2016: Andrology
https://www.readbyqxmd.com/read/27989023/sexual-functioning-mirrors-overall-men-s-health-status-even-irrespective-of-cardiovascular-risk-factors
#11
P Capogrosso, E Ventimiglia, L Boeri, U Capitanio, G Gandaglia, F Dehò, F Pederzoli, W Cazzaniga, R Scano, F Montorsi, A Salonia
Erectile dysfunction has been described as a sentinel marker of co-existing and undetected cardiovascular disease. Beside cardiovascular diseases, a correlation between erectile dysfunction and other major comorbidities has been also reported. The study was aimed to analyze the association between sexual functioning and overall men's health in sexually active, Caucasian-European men with new-onset sexual dysfunction. Data from the last 881 consecutive patients seeking first medical help for sexual dysfunction were cross-sectionally analyzed...
January 2017: Andrology
https://www.readbyqxmd.com/read/27989022/reviewers
#12
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Andrology
https://www.readbyqxmd.com/read/27989021/can-mesenchymal-stem-cells-improve-spermatogonial-stem-cell-transplantation-efficiency
#13
REVIEW
P Kadam, D Van Saen, E Goossens
Improved treatments have led to an increased survival rate in cancer patients. However, in pre-pubertal boys, these gonadotoxic treatments can result in the depletion of the spermatogonial stem cell (SSC) pool causing lifelong infertility. SSC transplantation has been proposed as a promising technique to preserve the fertility of these patients. In mice, this technique has resulted in live-born offspring, but the efficiency of colonization remained low. This could be because of a deficient microenvironment, leading to apoptosis of the transplanted SSCs...
January 2017: Andrology
https://www.readbyqxmd.com/read/27989020/constancy-amid-change-the-evolution-of-andrology
#14
EDITORIAL
D T Carrell
No abstract text is available yet for this article.
January 2017: Andrology
https://www.readbyqxmd.com/read/27871129/a-comment-on-the-discussion-and-application-of-statistical-methods-in-mandrup-et%C3%A2-al-low-dose-effects-of-bisphenol-a-on-mammary-gland-development-in-rats-andrology-4-673-683-2016
#15
LETTER
https://www.readbyqxmd.com/read/27863106/2-arachidonoylglycerol-levels-are-increased-in-leukocytospermia-and-correlate-with-seminal-macrophages
#16
A Barbonetti, T Bisogno, N Battista, F Piscitelli, A Micillo, S Francavilla, M Maccarrone, F Francavilla
Evidence has been produced that macrophages can actively generate endocannabinoids (eCBs) in response to inflammatory stimuli. As eCBs are involved in the control of several physiological processes, including reproduction, here, we explored whether seminal levels of the eCBs, N-arachidonoylethanolamine (AEA), and 2-arachidonoylglycerol (2-AG), were higher in the presence of leukocytospermia, and were correlated with semen concentration of macrophages. The content of AEA and 2-AG was measured by high-performance liquid chromatography/mass spectrometry in seminal plasma of ejaculates from 18 leukocytospermic patients (>1 × 10(6) leukocytes/mL) and 21 normozoospermic controls...
January 2017: Andrology
https://www.readbyqxmd.com/read/27860459/adjusting-for-abstinence-time-in-semen-analyses-some-considerations
#17
LETTER
K A Michels, K Kim, E H Yeung, T C Plowden, E N Chaljub, Y-L Lu, S L Mumford
No abstract text is available yet for this article.
January 2017: Andrology
https://www.readbyqxmd.com/read/27860455/papaverine-sensitive-phosphodiesterase-activity-is-measured-in-bovine-spermatozoa
#18
A Bergeron, A Hébert, C Guillemette, A Laroche, M-P Poulin, J P Aragon, P Leclerc, R Sullivan, P Blondin, C Vigneault, F J Richard
Cyclic adenosine monophosphate (cAMP) plays a crucial role as a signaling molecule for capacitation, motility, and acrosome reaction in mammalian spermatozoa. It is well-known that cAMP degradation by phosphodiesterase (PDE) enzyme has a major impact on sperm functions. This study was undertaken to characterize cAMP-PDE activity in bovine spermatozoa. Total cAMP-PDE activity in cauda epididymal and ejaculated spermatozoa was 543.2 ± 49.5 and 1252.6 ± 86.5 fmoles/min/10(6) spermatozoa, respectively. Using different family-specific PDE inhibitors, we showed that in cauda epididymal and ejaculated spermatozoa, the major cAMP-PDE activity was papaverine-sensitive (44...
January 2017: Andrology
https://www.readbyqxmd.com/read/27860425/centrally-mediated-ejaculatory-response-via-sympathetic-outflow-in-rats-role-of-n-methyl-d-aspartic-acid-receptors-in-paraventricular-nucleus
#19
J-D Xia, J Chen, H-J Sun, L-H Zhou, G-Q Zhu, Y Chen, Y-T Dai
Ejaculation is mediated by a spinal generator, which integrates inputs related to the sexual activity and coordinates sympathetic, parasympathetic, and motor outflow. Previous clinical studies indicate that primary premature ejaculation is related to the hyperactivity of the sympathetic nervous system. In this study, we explored the roles of N-methyl-D-aspartic acid (NMDA) receptors in paraventricular nucleus of the hypothalamus (PVN) on ejaculatory responses and its potential mechanism in the rats. We found that microinjection of 0...
January 2017: Andrology
https://www.readbyqxmd.com/read/27860400/identification-of-protein-changes-in-human-spermatozoa-throughout-the-cryopreservation-process
#20
O A Bogle, K Kumar, C Attardo-Parrinello, S E M Lewis, J M Estanyol, J L Ballescà, R Oliva
Cryoinjury is a consequence of cryopreservation and may have a negative impact on sperm quality regarding motility, morphology, and viability. This study was designed to identify potential proteomic changes in human sperm cells throughout the cryopreservation process. Comparisons made within this study included the detection of the sperm proteomic changes induced by incubation of the sperm cells with a protein-free cryoprotectant (with and without CryoSperm), and the proteomic changes induced by freezing, thawing, and subsequent after-thawing incubation at two different temperatures (0 °C vs...
January 2017: Andrology
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