Epididymal Sperm Count Research Articles

Role of Irisin Administration in Modulating Testicular Function in Adult Obese Albino Rats

AbstractBackground: Irisin, exercise-induced myokine, is known to improve obesity-induced metabolic disturbances by enhanc-ing thermogenesis and increasing energy expenditure. Recent studies have reported that irisin promoted cell proliferation and protected cells from apoptosis. However, the effects of irisin on testicular function in obese rats is still to be investi-gated.Aim of the Study: This study was designed to explore the probable effects of irisin treatment on modulating the adverse effects of obesity on testicular functions with a trial to clarify some of the possible underlying mechanisms.Material and Methods: Thirty adult male wistar albino rats (200±30g) were divided equally into 3 groups, group (I): Saline-vehicle treated normal fed group, group (II): Saline-vehicle treated rats were fed a High Fat Diet (HFD) for 10 weeks. Group (III): Irisin treated HFD-fed rats for 10 weeks and irisin was injected subcutaneously (150ml daily for 4 weeks). Rats were weighed and serum levels of glucose, insulin, lipid profile, FSH, LH, estradiol & testosterone levels, epididymal sperm count and motility, testicular Malondiald-hyde (MDA) level, Superoxide Dismutase (SOD), Catalase (CAT), Glutathione Peroxidase (GPX) activities, testicular and epidydimal fat weights were estimated. Testicular his-topathological study was done as well.Results: There was a significant increase in the Body Mass Index (BMI) together with deterioration of metabolic, gonadal functions and testicular oxidant/antio-oxidant system in group (II), while exogenous irisin administration in group (III) resulted in: Significant decrease in BMI, insulin resistance with improvement in lipid profile, significant increase in serum FSH, LH & testosterone, sperm count and motility in male rats. Together with marked improvement in the testicular histoarchitecture. Additionally, there was a significant increase in testicular SOD, CAT & GPX activities. However, it signif-icantly decreased testicular MDA level.Conclusions: It could be suggested that irisin has a po-tential positive role against obesity-induced testicular dys-function, which may be due to its role in maintenance of glucose & insulin homeostasis, its antioxidant properties and/ or maintenance of gonadal hormonal function via indirect and/or direct effects on the gonads.

English

The study was done to assess the ameliorative effects of co-administration of methanol extract of Bridelia ferruginea stem bark and diminazene aceturate on trypanosomosis induced testicular and haematological changes in infected male rat. Twenty five male rats were used in the study and assigned into five groups (n=5). Trypanosoma brucei was inoculated into Groups 1, 2, 3 and 4 rats except Group 5. Diminazene aceturate (7 mg/kg) was administered to group 1. Methanol extract of B. ferruginea (20 mg/kg) was administered to Group 2. Diaminazine aceturate (7 mg/kg) and B. Ferruginea (20 mg/kg) were administered to Group 3. The infected and untreated rats constituted Group 4. The normal control was Group 5. Parameters assessed were weight of the testicles, testicular sperm and epididymal sperm counts, packed cell volume, haemoglobin concentration and red blood and white blood cell counts. At the end of the experiment, there were significant increases in the testicular sperm (56.40±4.55) and epididymal sperm counts (24.34 ± 0.5) of group 3 compared to Group 2 – testicular sperm reserve (51.34 ± 6.19), epididymal sperm reserve (19.38 ± 4.14) and Group 1 – testicular sperm reserve (54.01± 6.92), epididymal sperm reserve (20 ± 5.79). The WBC was significantly higher in infected untreated (13. 70 ± 5.15) compared to Groups 1 (10.96 ± 1.21), 2 (10.36 ± 2.09) and 3 (10.55 ± 0.49). The results above showed that co-administration of diminazene aceturate and B. ferruginea extract produced optimum ameliorative effect. Key words: Bridelia ferruginea, diminazene aceturate, testicular changes, trypanosomosis.

Two months sodium nitrate supplementation alleviates testicular injury in streptozotocin-induced diabetic male rats.

What is the central question of this study? Can low-dose inorganic nitrate supplementation prevent testicular structural and functional alterations in streptozotocin-induced type 1 diabetic male rats? What is the main finding and it's important? Treatment with a low dose of inorganic nitrate for 2 months had protective effects on the male reproductive system in diabetic rats including improved body weight loss, sperm and testis parameters, spermatogenesis index and testicular histology as well as increased serum testosterone levels. These favourable effects may be associated with increased serum insulin and decreased serum glucose, and with modulation of apoptosis in testis. Inorganic nitrate supplementation is a possible therapeutic agent in diabetes. The aim of this study was to evaluate the effect of nitrate on the reproductive system in streptozotocin-induced diabetic male rats. Fifty male Wistar rats were allocated randomly to five groups: control (C), control plus nitrate (CN), diabetic (D), diabetic plus insulin (DI) and diabetic plus nitrate (DN). Sodium nitrate was administered for 2months in the drinking water (100mgl-1 ) of the CN and DN groups. Insulin was injected at 2-4U daily in the DI group. Serum glucose level and body weight were measured at the beginning of the study and at regular intervals. At the end of the study, serum levels of glucose, insulin, nitrogen oxides (NOx), luteinizing hormone (LH), follicle-stimulating hormone (FSH) and testosterone were assessed as well as sperm parameters, testis morphometry and histology, and testicular miR-34b and p53 mRNA expression. Nitrate treatment in diabetic rats significantly improved sperm parameters, epididymal weight, spermatogenesis and testicular histology as well as decreasing serum glucose and testicular p53 gene and miR-34b expression, although it had no effect on serum LH and FSH levels. In diabetic rats, serum insulin and NOx, body weight, testicular and epididymal weight, sperm count and motility, testis morphology, spermatogenesis indices, Johnsen's score, and testosterone were significantly lower than in controls. Nitrate administration increased serum insulin, NOx and testosterone levels in the DN group. Consuming water supplemented with sodium nitrate could improve diabetes-induced testicular functional and structural disorders; these favourable effects may be related to increased serum insulin and decreased serum glucose, as well as modulation of apoptosis in testis.

English

This study was carried out to determine the protective effect of aqueous garlic extract on testicular and spermatogenic changes in glibenclamide treated diabetic male rats. Thirty matured male rats were used in this study and were assigned into five groups of six rats each. Diabetes was induced in groups 1, 2, 3, 5 but not induced in group 4. Rats in group 1 were treated with glibenclamide (0.6 mg/kg) daily for 21 days. Rats in group 2 were treated with glibenclamide (0.6 mg/kg) and garlic extracts (Allium sativum) at the dose of 300 mg/kg for 21 days. Rats in group 3 were untreated diabetic given distilled water. Rats in group 4 were the normal control, given distilled water. Rats in group 5 were treated with garlic (300 mg/kg) dissolved in distilled water. On day 21 post treatment, there was a significant (p < 0.05) decrease in the fasting blood sugar (FBS) level of glibenclamide treated group when compared to garlic treated group and diabetic untreated group but there was a significant (p < 0.05) decrease in the FBS level of co-administration of glibenclamide and garlic when compared to glibenclamide alone and garlic alone. There were significant (p < 0.05) increases in testicular sperm count, epididymal sperm count and percentage sperm motility of group 2 when compared to groups 1, 3 and 5. From the above result, co-administration of glibenclamide and garlic extract produced optimum hypoglycemic activity and protective effect on testicular sperm and epididymal sperm counts, and percentage sperm motility in diabetic male rats. Key words: Diabetes, fasting blood sugar (FBS), garlic, glibenclamide, sperm count, sperm motility. &nbsp

Gosha-Jinki-Gan Recovers Spermatogenesis in Mice with Busulfan-Induced Aspermatogenesis.

Busulfan is an anti-cancer chemotherapeutic drug and is often used as conditioning regimens prior to bone marrow transplant for treatment of chronic myelogenous leukemia. Male infertility, including spermatogenesis disturbance, is known to be one of the side effects of anticancer drugs. While hormone preparations and vitamin preparations are used for spermatogenesis disturbance, their therapeutic effects are low. Some traditional herbal medicines have been administered to improve spermatogenesis. In the present study, we administered Gosha-jinki-gan (TJ107; Tsumura Co., Ltd., Tokyo, Japan) to mice suffering from severe aspermatogenesis after busulfan treatment to determine whether TJ107 can recover spermatogenesis. Male 4-week-old C57BL/6J mice were administered a single intraperitoneal injection of busulfan, and they were then fed a normal diet for 60 days and then a TJ107 diet or TJ107-free normal diet for another 60 days. After busulfan treatment, the weight of the testes and the epididymal sperm count progressively decreased in the normal diet group. On the other hand, in the TJ107 group, these variables dramatically recovered at 120 days. These results suggest that busulfan-induced aspermatogenesis is irreversible if appropriate treatment is not administered. Supplementation of TJ107 can completely recover the injured seminiferous epithelium via normalization of the macrophage migration and reduction of the expressions of Tool-like receptor (TLR) 2 and TLR4, suggesting that TJ107 has a therapeutic effect on busulfan-induced aspermatogenesis.

Hesperetin, a citrus flavonoid, attenuates testicular damage in diabetic rats via inhibition of oxidative stress, inflammation, and apoptosis

AimThis study was designed to assess the beneficial effect of hesperetin on diabetes-associated testicular injury in the rat. Main methodsOral treatment with hesperetin started 10 days after diabetes induction by streptozotocin (60 mg/kg, i.p.) for 46 days. Testicular damage was evaluated by histological evaluation of seminiferous tubules in addition to assessment of epididymal sperm count, motility, and viability. In addition, testicular biomarkers of apoptosis, inflammation, and oxidative stress were also determined. Key findingsHesperetin treatment of diabetic group prevented body weight loss and reduced serum glucose in addition to improvement of serum testosterone. Additionally, hesperetin-treated diabetic group had lower levels of malondialdehyde (MDA), reactive oxygen species (ROS), protein carbonyl, DNA fragmentation, and caspase 3 activity as specific biomarkers of oxidative stress and/or apoptosis. Furthermore, hesperetin augmented testicular antioxidant system as shown by higher levels of glutathione (GSH), mitochondrial membrane potential (MMP), and ferric reducing antioxidant power (FRAP) in addition to improvement of superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPx). Moreover, hesperetin administration to diabetic rats attenuated testicular indices of inflammation consisting of tumor necrosis factor α (TNFα) and interleukin 17 (IL-17) and prevented damage of seminiferous tubules as revealed by higher levels of sperm count, motility, and viability in diabetic rats. SignificanceCollectively, hesperetin could alleviate testicular damage in DM, at least through inhibition of apoptosis, oxidative stress, and inflammation in addition to its up-regulation of endogenous enzymatic and non-enzymatic antioxidants.

Effect of long-term deep slow-wave sleep deprivation on the reproductive system in male rats

Objective: To investigate the effect of long-term deep slow-wave sleep deprivation on the gonad axis, sperm abnormality rate, and structure of the testis in male rats and possible mechanisms. Methods: A total of 30 specific pathogen-free male Wistar rats aged 5 weeks were randomly divided into slow-wave sleep deprivation group 1 (SD1 group) , slow-wave sleep and sleep time deprivation group 2 (SD2 group) , and control group, with 10 rats in each group. The flower pot method was used to establish a model of sleep deprivation. In addition to 12-hour sleep deprivation at night, the rats in the SD1 group were given interference once every 24 minutes, and those in the SD2 group were deprived of sleep for 8 minutes every 24 minutes; the rats in the control group were given 12-hour light illumination and then placed in dark environment for 12 hours. All rats were sacrificed by exsanguination from the femoral artery, and the testis, the epididymis, and blood were collected for analysis. Sperm abnormality rate and sperm motility rate were measured, and cauda epididymal sperm counting was performed. ELISA was used to measure the serum levels of testosterone (T) , follicle-stimulating hormone (FSH) , and luteinizing hormone (LH) . Results: Compared with the control group, the SD2 group had a significant increase in organ coefficient of the epididymis (P<0.05) and a significant reduction in sperm motility rate (P<0.05) . There were significant differences between the SD1 group and the SD2 group in the increase in sperm abnormality rate (P<0.05) and the reduction in cauda epididymal sperm count (P<0.05) . The levels of FSH and T tended to increase, and the level of LH tended to decrease. Pathological examination showed degeneration and vacuolization of a small amount of spermatogenic cells in the SD1 group; in the SD2 group, there were significant degeneration, edema, and vacuolization of most spermatogenic cells, some spermatogenic cells were observed in the lumen, and there were no sperms in the lumen. Conclusion: Long-term deep slow-wave sleep deprivation impairs the structure of the testis, affects sperm motility rate and sex hormones, and increases the risk of sperm abnormality.

Germ Cell-Specific Retinoic Acid Receptor α Functions in Germ Cell Organization, Meiotic Integrity, and Spermatogonia.

Retinoic acid receptor α (RARA), a retinoic acid-dependent transcription factor, is expressed in both somatic and germ cells of the testis. Rara-null male mice with global Rara mutations displayed severely degenerated testis and infertility phenotypes. To elucidate the specific responsibility of germ cell RARA in spermatogenesis, Rara was deleted in germ cells, generating germ cell-specific Rara conditional knockout (cKO) mice. These Rara cKO animals exhibited phenotypes of quantitatively reduced epididymal sperm counts and disorganized germ cell layers in the seminiferous tubules, which worsened with aging. Abnormal tubules lacked lumen, contained vacuoles, and showed massive germ cell sloughing, all characteristics similar to those observed in Rara-null tubules. Spermatocyte chromosomal spreads revealed a novel role for germ cell RARA in modulating the integrity of synaptonemal complexes and meiotic progression. Furthermore, the initiation of spermatogenesis from spermatogonial stem cells was decreased in Rara cKO testes following busulfan treatment, supporting a role of germ cell RARA in spermatogonial proliferation. Collectively, the evidence in this study indicates that RARA produced in male germ cells has a broad spectrum of functions throughout spermatogenesis, which includes the maintenance of seminiferous epithelium organization, the integrity of the meiotic genome, and spermatogonial proliferation and differentiation. The results further suggest that germ cell RARA has dual functions: intrinsically in germ cells, balancing proliferation and differentiation of spermatogonia, and controlling genome integrity during meiosis; and extrinsically in the crosstalks with Sertoli cells, controlling the cell junctional physiology for coordinating proper spatial and temporal development of germ cells during spermatogenesis.

Ethanolic Seed Extract of Garcinia kola Reduces Epididymal Sperm Count and Some Serum Reproductive Hormone Concentrations in Adult Male Albino Wistar Rats

Ethanolic Seed Extract of Garcinia kola Reduces Epididymal Sperm Count and Some Serum Reproductive Hormone Concentrations in Adult Male Albino Wistar Rats

Effects of tebuconazole on cytochrome P450 enzymes, oxidative stress, and endocrine disruption in male rats.

The major objective of the present study was to determine the ability of a triazole fungicide tebuconazole to induce cytochrome P450-dependent monooxygenases, oxidative stress, and endocrine-disrupting activity using male rats treated with tebuconazole at 10, 25, and 50 mg/kg p.o. once daily for 28 days. In liver, tebuconazole dose-dependently increased microsomal contents of cytochrome P450 and cytochrome b5 and the activities of NADPH-cytochrome P450 reductase, 7-ethoxyresorufin O-deethylase, methoxyresorufin O-demethylase, pentoxyresorufin O-dealkylase, 7-ethoxycoumarin O-deethylase, aniline hydroxylase, and erythromycin N-demethylase. In kidney, tebuconazole increased 7-ethoxycoumarin O-deethylase activity without affecting other monooxygenase activities. In marked contrast to liver and kidney, tebuconazole decreased testicular 7-ethoxyresorufin O-deethylase, methoxyresorufin O-demethylase, 7-ethoxycoumarin O-deethylase, aniline hydroxylase, and erythromycin N-demethylase activities. The results of immunoblot analysis of liver microsomes of controls and tebuconazole-treated rats revealed that tebuconazole induced CYP1A1/2, CYP2B1/2, CYP2E1, and CYP3A proteins in liver. Additions of tebuconazole to liver microsomes inhibited microsomal 7-ethoxycoumarin O-deethylase activity in vitro (IC50 = 1.50-1.69 µM). Treatment of rats with tebuconazole decreased glutathione content and increased glutathione S-transferase, superoxide dismutase, catalase, and glutathione peroxidase activities in liver; increased superoxide dismutase activities in kidney and testis; but decreased glutathione S-transferase activity in testis. Treatments with tebuconazole decreased serum testosterone concentration and cauda epididymal sperm count. The present study demonstrates that tebuconazole induces a multiplicity of CYPs and oxidative stress in liver; inhibits testicular P450 and glutathione S-transferase activities; and produces anti-androgenic effects in male rats.

Nesfatin-1 Ameliorates Testicular Function Changes in Type 2 Diabetic Rats

Nesfatin-1 Ameliorates Testicular Function Changes in Type 2 Diabetic Rats

Fertility in male rats: Disentangling adverse effects of arsenic compounds

Arsenic impairs male reproductive functions. However, it is not clear whether different arsenic compounds similarly affect fertility. In this study, we compared the impact of sodium arsenite and arsenate on sperm quality and fertility. After 56 d exposure, male Wistar rats were mated and pregnant females were evaluated by fertility indexes. Clearly, exposure to 10 mg/L arsenite reduced daily sperm production via H2O2 overproduction and germ cells loss. Animals from this group also showed a decrease in epididymal sperm counts and percentage of sperm with intact membranes. Moreover, they presented low fertility potential and high preimplantation loss. In contrast, 10 mg/L arsenate caused oxidative stress in testis, mineral imbalance in epididymis, and sperm membranes damage, with no effects on fertility. Both arsenic compounds at 0.01 mg/L altered reproductive parameters. We concluded that arsenite is more harmful than arsenate to sperm quality and male fertility, with negative influences in early pregnancy.

Multigenerational effects of maternal cigarette smoke exposure during pregnancy on sperm counts of F1 and F2 male offspring

Animal models and human studies showed that in utero cigarette smoke exposure decreases sperm counts of offspring. This study used a mouse model to investigate the effects of maternal exposure to cigarette smoke on reproductive systems in F1 and F2 male offspring. Female ICR mice were exposed either to clean air or to cigarette smoke during pregnancy at the post-implantation stage. Epididymal sperm counts were decreased in a cigarette smoke dose–dependent manner in F1 (by 40–60%) and F2 males (by 23–40%) at postnatal day 56. In F1, the seminiferous epithelium heights were lower in the cigarette smoke–exposed groups than in the control group, and these effects were sustained in F2 males. Results suggest that maternal cigarette smoke exposure during pregnancy can have a multigenerational adverse effect on sperm counts in male offspring, which is mediated through in utero exposure of fetal germ cells to cigarette smoke.

Alleviative effect of resveratrol on polyvinyl chloride-induced reproductive toxicity in male Wistar rats

The present study was aimed to investigate the effect of PVC on reproductive competence in adult male Wistar rats. Further, the study also encompasses the protective effect of trans-resveratrol on PVC-induced reproductive toxicity in rats. Adult male rats weighing 210–240 g were administered with either PVC at two different doses 100 and 500 mg/kg body weight, orally, daily for 60 days or resveratrol (20 mg/kg body weight/day) through gavage for 60 days on alternate days or both PVC (500 mg/kg body weight) and resveratrol. The results revealed significant reduction in the weights of reproductive organs, epididymal sperm count, viable-, motile-, and HOS-tail coiled sperm and testicular daily sperm production, steroidogenic enzyme activities, serum testosterone levels in PVC treated rats. Conversely the levels of lipid peroxidation increased significantly with a decrease in activity levels of antioxidant enzymes in the testis of PVC exposed rats. Exposure to PVC resulted in reduction in epithelial thickness and seminiferous tubule diameter. No significant changes in the selected reproductive variables were observed in the resveratrol alone treated control rats, whereas, co-administration of resveratrol and PVC resulted in a significant improvement in steroidogenesis and spermatogenesis and mitigated oxidative stress over PVC exposed rats.

The evolutionarily conserved genes: Tex37, Ccdc73, Prss55 and Nxt2 are dispensable for fertility in mice

There are more than 2300 genes that are predominantly expressed in mouse testes. The role of hundreds of these genes has been studied in mouse spermatogenesis but still there are many genes whose function is unknown. Gene knockout (KO) strategy in mice is widely used for in vivo study of gene function. The present study was designed to explore the function of the four genes: Tex37, Ccdc73, Prss55 and Nxt2, which were evolutionarily conserved in eutherians. We found that these genes had a testis-enriched expression pattern in mice except Nxt2. We knocked out these genes by CRISPR/Cas9 individually and found that all the KO mice had normal fertility with no detectable difference in testis/body weight ratios, epididymal sperm counts, as well as testicular and epididymal histology from wild type mice. Although these genes are evolutionarily conserved in eutherians including human and mouse, they are not individually essential for spermatogenesis, testis development and male fertility in mice in laboratory conditions. Our report of these fertile KO data could avoid the repetition and duplication of efforts which will help in prioritizing efforts to focus on genes that are indispensable for male reproduction.

Effect of mobile phone electromagnetic waves on rat testis and the possible ameliorating role of Naringenin : A histological study

Introduction: With increasing the use of cell phones, the interest of examining the hazards that could affect health of people, which may or may not lead to cancer, infertility, or birth defects, was elevated. Recently, a natural flavonoid compound, Naringenin (NG) had received considerable attention as an antioxidant.Aim of the work: Evaluating the effects of mobile phone use on the testes of adult rats, the progress of spontaneous recovery and the protective role of NG supplementation against these effects.Materials and Methods: Twenty-four adult male albino rats were equally divided into four groups; control (I), (II) mobile, (III) mobile-NG and (IV) recovery. Mobile group exposed to 900 MHz continuous RF-EMW emitted by talk mode for one hour daily for 8 weeks. Mobile-NG group exposed to RF-EMW like group III for 8 weeks concomitant with NG treatment 50 mg/kg /day orally. While recovery group exposed to the same RF-EMW for 8 weeks then kept unexposed for another 8 weeks for recovery. Serum levels of testosterone hormone, epididymal sperm counts and testicular malondialdehyde (MDA) level were measured. Testicular sections were stained with H&E and immunohistochemical stains for PCNA, p53, CX43 and AR, that were subjected to morphometric and statistically analysis.Results: Deterioration of histological architecture of testes and biochemical and morphometric parameters wererecorded in mobile group. However, preservation of the testicular histological structure and restoration of the normal biochemical and morphometric parameters were obvious in group IV. On the other hand, the recovery group showed incomplete improvement where some testicular affection was noted.Conclusion: Mobile phones might have injurious effects on testes that partially recovered after stoppage of exposure to EMW. However, NG co-administration was protective.

The impact of electric fields on testis physiopathology, sperm parameters and DNA integrity-The role of resveratrol.

This study investigated the long-term effects of electric fields (EF) which might cause physiopathological or morphological changes in the testis tissues of rats. We assumed that using resveratrol (RES) might reduce harmful effects of the EF. Thirty-two male Wistar Albino rats were randomly divided into four groups with eight animals in each; control, EF, EF+RES and RES. Malondialdehyde (MDA), superoxide dismutase, catalase, glutathione peroxidase and histopathological parameters were evaluated in testis tissue. Epididymal sperm count, motility and DNA damage were studied. Total testosterone, follicle-stimulating hormone, luteinising hormone, estradiol and growth hormone levels were evaluated in the plasma samples. EF caused statistically significant increase in MDA levels, body weight and DNA damage. A significant decrease was detected in sperm count and motility. The histopathological examination of the testes showed the germ cell decrease in the seminiferous epithelium with oedema and vascular congestion in the interstitial tissue. In immunohistochemical examination, the increase in the apoptotic cells number was detected. RES partially ameliorated biochemical, histopathological and immunohistochemical findings in the EF+RES group. These findings clearly demonstrated that EF can cause damage in rat testis. RES can ameliorate the damage caused by EF.

Influence of antifertility agents Dutasteride and Nifedipine on CatSper gene level in epididymis during sperm maturation in BALB/c mice.

Calcium (Ca2+) signaling is critical for successful fertilization. In spermatozoa, capacitation, hyperactivation of motility and the acrosome reaction are all mediated by increases in intracellular Ca2+ through CatSper (sperm-specific cation channel). The CatSper channel complex contains four pore-forming α subunits (CatSper1-4) and five accessory subunits called β, δ, ε, γ and ζ. Genetic deletion of any of the four CatSper genes in mice results in loss of hyperactivated motility and male infertility. Despite their vital role in male fertility, almost very little is known about influence of antifertility agents on CatSper gene expression in epididymis and epididymal spermatozoa. Therefore, we performed quantitative real-time qPCR analysis for CatSper expression in the epididymis and epididymal sperm of BALB/c mice after treatment with Dutasteride (DS), a dual 5-α reductase inhibitor and Nifedipine (NF) a calcium channel blocker as positive control. We observed that treatment with antifertility agents Dutasteride and Nifedipine induced significant decreases in the caput and cauda epididymal sperm counts, motility and fertility which could partly be attributed to alteration in the normal morphology of the sperm associated with downregulation/upregulation of CatSper mRNAs in epididymis and epididymal spermatozoa of male BALB/c mice. These can be explained on the basis of interference with mechanisms affecting calcium ion signaling resulting in changes in intracellular calcium required for sperm activity, finally affecting sperm maturation and fertility of male BALB/c mice. These studies provide some novel avenues for developing new male contraceptives in future.

L-carnitine counteracts prepubertal exposure to cisplatin induced impaired sperm in adult rats by preventing germ cell apoptosis

ABSTRACTWe investigated the possible protective effects of L-carnitine on cisplatin induced prepubertal gonadotoxicity and on adult sperm. Prepubertal 30-day-old male rats were divided randomly into three groups: control (n = 12), cisplatin exposed (n = 16) and carnitine treated after cisplatin exposure (n = 16). Rats in the experimental groups were injected with a single dose of cisplatin. L-carnitine was injected 1 h before cisplatin administration and for the following 3 days for the cisplatin + carnitine group. The rats were sacrificed at 31 or 90 days old and their testes were harvested for morphometric and histopathological analysis. Testes of 31-day-old prepubertal rats were examined for germ cell apoptosis using the TUNEL method and for proliferation using PCNA immunostaining. The morphology, motility, quantity and vitality of sperm in epididymal fluid samples of adult 90-day-old rats also were evaluated. L-carnitine treatment reduced testicular damage and the number of TUNEL positive cells significantly, while the number of PCNA positive cells in the cisplatin + carnitine group increased compared to the cisplatin group. During the adult period, epididymal sperm count and viability were improved in rats treated with L-carnitine before prepubertal cisplatin injection. L-carnitine may reduce late testicular and spermatic damage caused by cisplatin administration to prepubertal rats by inducing germ cell proliferation and preventing apoptosis.

Lipopolysaccharide and lipotheicoic acid differentially modulate epididymal cytokine and chemokine profiles and sperm parameters in experimental acute epididymitis

Bacterial infections are the most prevalent etiological factors of epididymitis, a commonly diagnosed inflammatory disease in the investigation of male infertility factors. The influence of early pathogenic mechanisms at play during bacterial epididymitis on reproductive outcomes is little understood. We report here that experimental epididymitis induced in rats by Gram-negative (LPS) and Gram-positive (LTA) bacterial products resulted in differential patterns of acute inflammation in the cauda epididymis. LPS elicited a strong inflammatory reaction, as reflected by upregulation of levels of mRNA for seven inflammatory mediators (Il1b, Tnf, Il6, Ifng, Il10, Nos2 and Nfkbia), and tissue concentration of six cytokines/chemokines (IL1A, IL1B, IL6, IL10, CXCL2 and CCL2) within the first 24 h post-treatment. Conversely, LTA induced downregulation of one (Nfkbia) and upregulation of six (Il1b, Il6, Nos2, Il4Il10 and Ptgs1) inflammatory gene transcripts, whereas increased the tissue concentration of three cytokines/chemokines (IL10, CXCL2 and CCL2). The stronger acute inflammatory response induced by LPS correlated with a reduction of epididymal sperm count and transit time that occurred at 1, 7, and 15 days post-treatment. Our study provides evidence that early epididymal inflammatory signaling events to bacterial activators of innate immunity may contribute to the detrimental effects of epididymitis upon male fertility.