Spermatogenic and sperm quality differences in an experimental model of metabolic syndrome and hypogonadal hypogonadism

Mallidis, Con; Czerwiec, Agnieszka; Filippi, Sandra; O’Neill, Justin; Maggi, Mario; McClure, Neil

doi:10.1530/rep-10-0472

Cited by 35 publications

(34 citation statements)

References 53 publications

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“…Several attempts have been made in recent years to establish a good animal model like Ins 2 Akita mouse and animals fed with high-fat diet [24,25] which do not involve any pharmacological intervention. These approaches may provide a new and exciting model to study the pathophysiological changes associated with diabetes.…”

Section: Discussionmentioning

confidence: 99%

Germ cell abnormalities in streptozotocin induced diabetic mice do not correlate with blood glucose level

Bose

Adiga

D’Souza

et al. 2012

J Assist Reprod Genet

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Purpose To assess the effect of streptozotocin induced hyperglycemia on germ cell integrity, DNA ploidy and methylation status for a period of two spermatogenesis cycles in adult male Swiss albino mice. Methods Streptozotocin injected mice were monitored for hyperglycemia at a regular interval for a period of 36 and 72 days. The DNA integrity in epididymal spermatozoa was determined by the comet assay. Flow cytometric analysis was done in germ cells to assess the DNA ploidy. The global methylation analysis in germ cells was done by 5-methyl cytosine immunostaining.Results Streptozotocin administration successfully resulted in hyperglycemic response which significantly affected serum testosterone level, sperm DNA integrity and DNA ploidy at the end of 36 days. However, no changes were observed in either epididymal sperm concentration or germ cell methylation status. In contrast, at the end of 76 days, although serum testosterone level, sperm DNA integrity and DNA ploidy status were unperturbed significantly in hyperglycemic group, the epididymal sperm concentration and methylation status of preleptotene/zygotene cells were significantly altered. Importantly, an attempt to find out the association between the blood glucose levels and the abnormalities in hyperglycemic group failed to demonstrate any correlation. Conclusions The germ cell abnormalities observed in hyperglycemic group could be interpreted as a primary effect of streptozotocin and not due to hyperglycemia. Our results call for further evaluation of streptozotocin before its application to study the hyperglycemic responses on male germ cells.

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Section: Discussionmentioning

confidence: 99%

Germ cell abnormalities in streptozotocin induced diabetic mice do not correlate with blood glucose level

Bose

Adiga

D’Souza

et al. 2012

J Assist Reprod Genet

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“…1 One of the theories of the varicocele influence on spermatogenesis is the resultant venous blood stagnation in the testis that increases oxidative stress and hinders spermatogenesis through a thermal effect. 2 Varicocelectomy is by far the most common procedure to treat male subfertility in patients with clinical varicocele. It reduces intratesticular temperature to the normal range.…”

Section: Introductionmentioning

confidence: 99%

Predictors of improvement in semen parameters after varicocelectomy for male subfertility: A prospective study

Shabana

Teleb

Dawod

et al. 2015

CUAJ

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Introduction: We aim to predict results of varicocelectomy on sperm density and progressive motility using preoperative clinical, laboratory and radiological data and to propose cut-off values for significant parameters. Methods: This prospective study was carried out between July 2011 and June 2014. We included 123 patients in our study. They were diagnosed with primary infertility with varicocele, were scheduled for varicocelectomy, and completed their follow-up. We excluded patients with azoospermia, total necrospermia, recurrent varicocele, and pituitary hormonal abnormalities. Varicocele was diagnosed and graded by physical examination and colour Doppler ultrasound. Semen analyses were completed preoperatively and 6 months postoperatively. Microscopic subinguinal varicocelectomy was done in all cases. Patient demographics, pre-and postoperative clinical data (varicocele grade and semen parameters) were statistically analyzed. Results: The mean ± standard deviation of age, body mass index, and subfertility duration was 28.3 ± 7.4 years, 29.1 ± 2.7 kg/m 2 , and 21.9 ± 7.1 months, respectively. About 53% of our patients (n = 66) had bilateral varicocele, and unilateral disease was found in the other 57 (46.3%) cases. Varicocele grade I was diagnosed in 42 (34.1%) patients, while the other 81 (65.9%) patients had grade II or III. Higher grades of varicocele, preoperative total testosterone level, sperm density, and progressive motility had a statistically significant impact on the outcome of varicocelectomy in univariate testing. Multivariate logistic analysis revealed that grade of preoperative varicocele (95% confidence interval [CI] 5.6-6.3, p = 0.007) and sperm density (95% CI 2.7-1.6, p = 0.0035), and progressive motility (95% CI 1.1-2.3, p = 0.0123) are independent predictors of semen parameters improvement after varicocelectomy. Conclusion:The grade of the varicocele, sperm density, and progressive motility are major predictors of outcome in varicocelectomy. Cut-off values of >8 million/mL and >18% for sperm density and progressive motility, respectively, in men with varicocele grade II or III, indicate a successful outcome. IntroductionVaricocele is an abnormal enlargement and tortuosity of the pampiniform plexus of veins in the spermatic cord. It is the most common identifiable cause of male subfertility, with an estimated prevalence of 15% in the general male population and up to 40% in subfertile men.1 One of the theories of the varicocele influence on spermatogenesis is the resultant venous blood stagnation in the testis that increases oxidative stress and hinders spermatogenesis through a thermal effect. 2Varicocelectomy is by far the most common procedure to treat male subfertility in patients with clinical varicocele. It reduces intratesticular temperature to the normal range. Hence, semen parameters not uncommonly show significant improvement following varicocele ligation. There are many approaches for varicocelectomy. [4][5][6] Initially open surgical approach was the standard, but now...

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“…Available animal models of MetS, both genetically (Vartanian et al, 2006) and high fat diet- (Mallidis et al, 2011) induced, suggest that MetS is associated with deranged spermatogenesis and poor sperm quality.…”

Section: Introductionmentioning

confidence: 99%

Seminal, ultrasound and psychobiological parameters correlate with metabolic syndrome in male members of infertile couples

et al. 2013

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SUMMARYMetabolic syndrome (MetS) is a diagnostic category which identifies subjects at high risk for diabetes and cardiovascular diseases, erectile dysfunction (ED) and male hypogonadism. However, MetS impact on male infertility has been poorly studied. We systematically evaluated possible associations between MetS and clinical characteristics in men with couple infertility. Out of 367 consecutive subjects, 351 men without genetic abnormalities were studied. MetS was defined according to the International Diabetes Federation&American Heart Association/National Heart,Lung, and Blood Institute classification. All men underwent physical, hormonal, seminal and scrotal ultrasound evaluation. Erectile and ejaculatory functions were assessed by International Index of Erectile Function-15 erectile function domain (IIEF-15-EFD) and Premature Ejaculation Diagnostic Tool (PEDT), respectively, while psychological symptoms by Middlesex Hospital Questionnaire. Out of 351 patients, 27 (7.7%) fulfilled MetS criteria. Among ultrasound features, in an age-adjusted logistic model, only testis inhomogeneity was significantly associated with increasing MetS factors (HR = 1.36 [1.09-1.70]; p < 0.01). In an age-adjusted model, MetS was associated with a stepwise decline in total testosterone (TT) (B = À1.25 ± 0.33; p < 0.0001), without a concomitant rise in gonadotropins. At univariate analysis, progressive motility and normal morphology were negatively related to the number of MetS components (both p < 0.0001), but when age and TT were introduced in a multivariate model, only sperm morphology retained a significant association (B = À1.418 ± 0.42; p = 0.001). The risk of ED (IIEF-15-EFD score <26) increased as a function of the number of MetS factors, even after adjusting for age and TT (HR = 1.45[1.08-1.95]; p < 0.02). No association between PEDT score and MetS was observed. Finally, after adjusting for age and TT, somatization and depressive symptoms were associated with increasing MetS components (B = 0.66 ± 0.03, p < 0.05; B = 0.69 ± 0.03, p < 0.02; respectively). In conclusion, in men with couple infertility, MetS is associated with hypogonadism, poor sperm morphology, testis ultrasound inhomogeneity, ED, somatization and depression. Recognizing MetS could help patients to improve not only fertility but also sexual and overall health.

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Spermatogenic and sperm quality differences in an experimental model of metabolic syndrome and hypogonadal hypogonadism

Cited by 35 publications

References 53 publications

Germ cell abnormalities in streptozotocin induced diabetic mice do not correlate with blood glucose level

Germ cell abnormalities in streptozotocin induced diabetic mice do not correlate with blood glucose level

Predictors of improvement in semen parameters after varicocelectomy for male subfertility: A prospective study

Seminal, ultrasound and psychobiological parameters correlate with metabolic syndrome in male members of infertile couples

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