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International Journal of Andrology

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https://www.readbyqxmd.com/read/22897820/novel-mutations-in-calcium-calmodulin-dependent-protein-kinase-iv-camk4-gene-in-infertile-men
#1
A Khattri, V P Reddy, R K Pandey, D V S Sudhakar, N J Gupta, B N Chakravarty, M Deenadayal, L Singh, K Thangaraj
Calcium/calmodulin-dependent protein kinase IV (CAMK4) is a multifunctional serine/threonine protein kinase, which plays an important role in the spermatogenesis by phosphorylating protamines. It has been shown to be involved in the regulation of human sperm motility. Moreover, the Camk4 knockout mice were infertile because of severely reduced sperm count and morphological abnormalities. As no study is available on the association of this gene with male infertility, we analysed all the exons of CAMK4 gene in ethnically matched 283 infertile and 268 fertile Indian men...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22882535/variations-in-testosterone-pathway-genes-and-susceptibility-to-testicular-cancer-in-norwegian-men
#2
W Kristiansen, E L Aschim, J M Andersen, O Witczak, S D Fosså, T B Haugen
Imbalance between the oestrogen and androgen levels in utero is hypothesized to influence testicular cancer (TC) risk. Thus, variation in genes involved in the action of sex hormones may contribute to variability of an individual's susceptibility to TC. Mutations in testosterone pathway genes may alter the level of testosterone in vivo and hypothetically the risk of developing TC. Luteinizing hormone receptor (LHR), 5α-reductase II (SRD5A2) and androgen receptor (AR) are key elements in androgen action. A case-control study comprising 651 TC cases and 313 controls in a Norwegian population was conducted for investigation of polymorphisms in the LHR, SRD5A and AR genes and their possible association with TC...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22882515/selective-resection-of-dorsal-nerves-of-penis-for-premature-ejaculation
#3
RANDOMIZED CONTROLLED TRIAL
G-X Zhang, L-P Yu, W-J Bai, X-F Wang
Premature ejaculation (PE) is one of the most prevalent male sexual dysfunctions. Selective resection of the dorsal nerve (SRDN) of penis has recently been used for the treatment of PE and has shown some efficacy. To further clarify the efficacy and safety of SRDN on PE, we performed a preliminary, randomized, placebo-controlled clinical observational study. Persons with the complaints of rapid ejaculation, asking for circumcision because of redundant foreskin, intravaginal ejaculation latency time (IELT) within 2 min, not responding to antidepressant medication or disliking oral medication were randomly enrolled in two groups...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22882481/significant-enrichment-of-y-bearing-chromosome-human-spermatozoa-using-a-modified-centrifugation-technique
#4
S Koundouros, P Verma
The effective separation of X- and Y-bearing chromosome spermatozoa has been a topic of major attraction to a number of scientific disciplines. Approaches have typically been based upon either the kinetic or the physical characteristics of spermatozoa. Much of the information available to date has either suggested conflicting evidence between different approaches or a lack of repeatability, while other robust and reproducible techniques require expensive equipment and are being questioned with relation to their safety in clinical applications...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22775966/haemorrhoids-are-associated-with-erectile-dysfunction-a-population-based-study
#5
J J Keller, H-C Lin
Haemorrhoids are associated with regional vascular abnormalities and rectal pain, which are hypothesized to increase the risk of erectile dysfunction (ED); however, few studies have investigated the association between ED and haemorrhoids. This case-control study aimed to estimate the association between haemorrhoids and ED by using a population-based data in Taiwan. We identified 6,310 patients with ED as cases and randomly selected 31,550 controls. Conditional logistic regression was performed to compute the odds ratio (OR) for having been previously diagnosed with haemorrhoids between cases and controls...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22713128/associations-between-testosterone-bone-mineral-density-vitamin-d-and-semen-quality-in-fertile-and-infertile-chinese-men
#6
B Yang, H Sun, Y Wan, H Wang, W Qin, L Yang, H Zhao, J Yuan, B Yao
Testosterone (T) and vitamin D (VD) interact in androgen deficient men, however, this interaction and subsequent semen quality and bone mineral density (BMD) status is not clear in infertile men. Our objective was to investigate T, VD, semen quality, BMD and their relationships in Chinese infertile men. We conducted a cross-sectional study of 559 men aged 20-40 years, including 195 fertile men, 9 infertile men with known risk factors for osteoporosis (WR) and 355 infertile men without known risk factors for osteoporosis (WOR)...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22713104/age-at-puberty-and-risk-of-testicular-cancer-a-meta-analysis
#7
M Maule, J L Malavassi, L Richiardi
Testicular cancer is one of the most rapidly increasing tumour types but its aetiology is still largely unexplained. Cryptorchidism and familial testicular cancer, established risk factors, explain less than 10% of all cases. Among investigated post-natal factors, early puberty was suggested as a potential risk factor but the topic has been poorly investigated. We undertook a meta-analysis of the effect of age at puberty on testicular cancer risk, attempting at enhancing the homogeneity in the definition of the exposure among studies to obtain valid pooled estimates...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22712895/the-role-of-male-chromosomal-polymorphism-played-in-spermatogenesis-and-the-outcome-of-ivf-icsi-et-treatment
#8
T Guo, Y Qin, X Gao, H Chen, G Li, J Ma, Z-J Chen
Chromosomal polymorphism has been reported to be associated with infertility, but its effect on IVF/ICSI-ET outcome is still controversial. To evaluate whether or not chromosomal polymorphism in men plays a role in spermatogenesis and the outcome of IVF/ICSI-ET, we retrospectively analysed 281 infertile couples. Measures included fertilization rate, implantation rate, pregnancy rate, clinical pregnancy rate, ongoing pregnancy rate, early miscarriage rate and preterm rate. Men with chromosomal polymorphism had significantly higher frequencies of severe oligozoospermia and azoospermia than those without (37...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22712465/imbalance-of-mmp-2-and-mmp-9-expression-versus-timp-1-and-timp-2-reflects-increased-invasiveness-of-human-testicular-germ-cell-tumours
#9
E Milia-Argeiti, E Huet, V T Labropoulou, S Mourah, P Fenichel, N K Karamanos, S Menashi, A D Theocharis
The histological classification of testicular germ cell tumours (TGCTs) to seminoma or non-seminomatous germ cell tumours is at present the main criterion for the clinical outcome and selection of the treatment strategy. In view of the need to identify novel prognostic biomarkers for TGCTs, we investigated the expression of the matrix metalloproteinases MMP-2 and MMP-9 in testicular tumour tissues and cell lines of both seminoma and non-seminoma origin. Immunohistochemistry and zymography analysis of tumoural tissues showed significantly higher levels of MMP-2 and MMP-9 compared with normal testis with the active forms detected only in the tumour tissues...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22712438/androgen-depletion-augments-antibacterial-prostate-host-defences-in-rats
#10
A A Quintar, C Leimgruber, O A Pessah, A Doll, C A Maldonado
The defence of the male reproductive tract against microorganisms is critical for fertilization. The prostate gland has been reported to express several molecules of the innate immune system. However, little information is available about how androgens may modulate host defences within the prostate. We therefore aimed to examine in the rat the expression of the TLR4 system, which is strongly involved in pathogen recognition, and the secretion of the antibacterial substances rBD-1 and SP-D after androgen withdrawal...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22709341/effects-of-nucleotides-adenosine-monophosphate-and-adenosine-triphosphate-in-combination-with-l-arginine-on-male-rabbit-corpus-cavernosum-tissue
#11
V Hupertan, Y Neuzillet, O Stücker, C Pons, E Leammel, T Lebret
Purines and more specifically adenosine monophosphate (AMP) and adenosine triphosphate (ATP) have a strong relaxant effect on smooth muscle cells of the dog, rabbit and human corpus cavernosum, to approximately the same degree as nitric oxide (NO). However, purines are considered as modulators of erectile function rather than key mediators. This suggests that the use of purines combined with NO donors could be effective to treat some specific erectile disorders. The relaxation induced by the combination of l-arginine (Arg), a natural substrate for NO synthase, was assessed with a purine-nucleotide (AMP, ATP) on a rabbit corpus cavernosum model, to determine if these substances could potentiate each other's effect...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22640232/clinical-correlates-of-sex-steroids-and-gonadotropins-in-men-over-the-late-adulthood-the-framingham-heart-study
#12
R Haring, V Xanthakis, A Coviello, L Sullivan, S Bhasin, H Wallaschofski, J M Murabito, R S Vasan
Low serum concentrations of sex steroids and gonadotropins in men have been associated with increased cardiometabolic risk and mortality, but the clinical correlates of these hormones in men over late adulthood are less clearly understood. We analysed up to five serial measurements of total testosterone (TT), dehydroepiandrosterone sulphate (DHEAS), follicle stimulating hormone (FSH), luteinizing hormone (LH) and total estradiol (EST) in older men in the original cohort of the Framingham Heart Study to determine the short- (2-years; 1,165 person-observations in 528 individuals) and long-term (up to 10-years follow-up; 2520 person-observations in 835 individuals with mean baseline age: 71...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22640168/evidence-for-an-adaptation-in-ros-scavenging-systems-in-human-testicular-peritubular-cells-from-infertility-patients
#13
C Kampfer, S Spillner, K Spinnler, J U Schwarzer, C Terradas, R Ponzio, E Puigdomenech, O Levalle, F M Köhn, M E Matzkin, R S Calandra, M B Frungieri, A Mayerhofer
Fibrosis, increased amounts of immune cells and expression of COX-2 in the testes of infertility patients provide circumstantial evidence for a specific testicular milieu, in which reactive oxygen species (ROS) could be increased. If ROS level increase and/or ROS scavengers decrease, the resulting testicular oxidative stress may contribute to human male infertility. Primary peritubular cells of the human testis, from men with normal spermatogenesis (HTPCs) and infertile patients (HTPC-Fs), previously allowed us to identify an end product of COX-2 action, a prostaglandin derivative (15dPGJ2), which acts via ROS to alter the phenotype of peritubular cells, at least in vitro...
December 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22966843/progesterone-and-catsper-dependency
#14
EDITORIAL
Martin Blomberg Jensen, Stephen J Publicover
No abstract text is available yet for this article.
October 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22834774/thyroid-hormones-and-male-sexual-function
#15
MULTICENTER STUDY
G Corona, F C W Wu, G Forti, D M Lee, D B O'Connor, T W O'Neill, N Pendleton, G Bartfai, S Boonen, F F Casanueva, J D Finn, A Giwercman, T S Han, I T Huhtaniemi, K Kula, M E J Lean, M Punab, D Vanderschueren, E A Jannini, E Mannucci, M Maggi
The role of thyroid hormones in the control of erectile functioning has been only superficially investigated. The aim of the present study was to investigate the association between thyroid and erectile function in two different cohorts of subjects. The first one derives from the European Male Ageing Study (EMAS study), a multicentre survey performed on a sample of 3369 community-dwelling men aged 40-79 years (mean 60 ± 11 years). The second cohort is a consecutive series of 3203 heterosexual male patients (mean age 51...
October 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22775762/differential-concentration-and-time-dependent-effects-of-progesterone-on-kinase-activity-hyperactivation-and-acrosome-reaction-in-human-spermatozoa
#16
V Sagare-Patil, M Galvankar, M Satiya, B Bhandari, S K Gupta, D Modi
Progesterone has been identified to be one of the physiological regulators of sperm hyperactivation and acrosome reaction. However, the high sensitivity of human spermatozoa to progesterone implies that many may undergo premature hyperactivation and acrosome reaction thereby compromising their ability to fertilize. We hypothesized that if a spermatozoon has to preclude the occurrence of these events prematurely, there should be differential dose- and time-dependent effects on motility and acrosome reaction...
October 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22709244/focus-on-paediatric-and-adolescent-varicocoele-a-single-institution-experience
#17
M Cimador, M Pensabene, M Sergio, A M Caruso, E De Grazia
The aim of this study was to report our long-term diagnostic and surgical outcome during the last 18 years, in paediatric and adolescent management of varicocoele. The present retrospective study enrols 374 patients observed at our institution between 1994 and 2011. Patients were divided into three groups: Group A includes 142 youngsters and adolescents treated with open surgery for left varicocoele, in which a pre-operative CDUS was not performed; Group B includes 65 patients treated with open surgery in which a pre-operative CDUS evaluation was carried out, to assess varicocoele haemodynamic pattern and testicular volume...
October 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22519695/high-prevalence-of-androgen-deficiency-and-abnormal-lipid-profile-in-infertile-men-with-non-obstructive-azoospermia
#18
J Bobjer, M Naumovska, Y L Giwercman, A Giwercman
In men with non-obstructive azoospermia (NOA), the risk of hypogonadism is often overlooked. Testicular sperm extraction (TESE) may increase this risk. The objective of this study was to elucidate the prevalence of hypogonadism in NOA-patients, the impact of TESE on hormone balance and the association between testosterone deficiency and dyslipidaemia. Men with NOA who had undergone TESE during the period 2004-2009 were eligible. Hypogonadism was defined as total testosterone <10 nmol/L and/or LH >10 IU/L and/or ongoing androgen replacement therapy...
October 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22519675/sperm-chromatin-integrity-may-predict-future-fertility-for-unexplained-recurrent-spontaneous-abortion-patients
#19
MULTICENTER STUDY
Lihong Zhang, Leiguang Wang, Xingqi Zhang, Guanzhao Xu, Wei Zhang, Kehua Wang, Qiuju Wang, Yi Qiu, Juan Li, Ling Gai
The pathogenesis of recurrent spontaneous abortion (RSA) is multi-factorial, complex and poorly understood. In the present study, semen parameters, including sperm chromatin integrity, sperm concentration, sperm motility and sperm morphology, were compared between 111 men whose partners had a history of unexplained RSA (RSA group) and 30 healthy fertile men (control group). The RSA group was further separated into three subgroups, depending on their reproductive outcome during the 12 months after they were enrolled in the study: the pregnancy subgroup consisted of 43 men whose partners achieved a successful pregnancy up to at least the 24th week of gestation; the abortion subgroup included 31 men whose partners experienced further abortions; and the infertile subgroup had 37 men whose partners did not have any positive pregnancy test after regular, unprotected intercourse...
October 2012: International Journal of Andrology
https://www.readbyqxmd.com/read/22519659/the-relationship-between-anogenital-distance-and-azoospermia-in-adult-men
#20
Michael L Eisenberg, Michael Shy, R Chanc Walters, Larry I Lipshultz
Anogenital distance (AGD) is a marker for endocrine disruption in animal studies in which decreased male AGD has been associated with testicular dysfunction. The objective of the study was to investigate whether anogenital distance could distinguish men with obstructive azoospermia (OA) from those with nonobstructive azoospermia (NOA). To accomplish this, azoospermic men were recruited and evaluated at a men's reproductive health clinic in Houston, TX. Anogenital distance (the distance from the posterior aspect of the scrotum to the anal verge) and penile length (PL) were measured using digital calipers...
October 2012: International Journal of Andrology
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