Espermatogénesis

  • 文章类型: Journal Article
    OBJECTIVE: The current study aimed to explore the potential protective effect of Passiflora Incarnata L., (PI) in treating IR injury after testicular torsion in rats.
    METHODS: This research investigated the impact of PI on IR damage in male Wistar albino rats. Animals were divided to three groups: group 1 (sham), group 2 (IR), and group 3 (IR+PI).
    RESULTS: The malondialdehyde (MDA), myeloperoxidase (MPO) and glutathione (GSH) levels did not significantly differ across the groups (p = 0.830, p = 0.153 and p=0.140, respectively). However, Group 3 demonstrated a superior total antioxidant status (TAS) value compared to Group 2 (p = 0.020). Concurrently, Group 3 presented a significantly diminished mean total oxidant status (TOS) relative to Group 2 (p = 0.009). Furthermore, Group 3 showed a markedly improved Johnsen score relative to Group 2 (p < 0.01). IR caused cell degeneration, apoptosis, and fibrosis in testicular tissues. PI treatment, however, mitigated these effects, preserved seminiferous tubule integrity and promoted regular spermatogenesis. Furthermore, it reduced expression of tumor necrosis factor-alpha (TNF-α), Bax, and Annexin V, signifying diminished inflammation and apoptosis, thereby supporting cell survival (p < 0.01, p < 0.01, p < 0.01, respectively).
    CONCLUSIONS: This study revealed that PI significantly reduces oxidative stress and testicular damage, potentially benefiting therapies for IR injuries.
    OBJECTIVE: Explorar el posible efecto protector de Passiflora incarnata L. (PI) en el tratamiento de la lesión por isquemia-reperfusión (IR) después de una torsión testicular en ratas.
    UNASSIGNED: Se estudió el impacto de Passiflora incarnata en el daño por IR en ratas Wistar albinas machos. Los animales se dividieron tres grupos: 1 (simulado), 2 (IR) y 3 (IR+PI).
    RESULTS: Los niveles de malondialdehyde (MDA), myeloperoxidase (MPO) y glutathione (GSH) no difirieron significativamente entre los grupos (p = 0.830, p = 0.153 y p = 0.140, respectivamente). Sin embargo, el grupo 3 tuvo un valor de estado antioxidante total (TAS) superior en comparación con el grupo 2 (p = 0.020). Al mismo tiempo, el grupo 3 presentó un estado oxidante total (TOS) medio significativamente disminuido en comparación con el grupo 2 (p = 0.009). El grupo 3 mostró una mejora notable en la puntuación de Johnsen en comparación con el grupo 2 (p < 0.01). La IR causó degeneración celular, apoptosis y fibrosis en los tejidos testiculares. El tratamiento con PI mitigó estos efectos, preservó la integridad de los túbulos seminíferos y promovió la espermatogénesis regular. Además, redujo la expresión de factor de necrosis tumoral alfa, Bax y anexina V, lo que significa una disminución de la inflamación y de la apoptosis, respaldando así la supervivencia celular (p < 0.01, p < 0.01 y p < 0.01, respectivamente).
    CONCLUSIONS: Este estudio reveló que PI reduce significativamente el estrés oxidativo y el daño testicular, beneficiando potencialmente las terapias para lesiones por IR.
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  • 文章类型: Systematic Review
    目的:本系统综述旨在评估由合成代谢雄激素类固醇(AAS)滥用引起的男性不育症的最佳治疗方法。
    方法:根据系统评价和荟萃分析(PRISMA)声明的首选报告项目进行系统评价。包括比较使用AAS后患者精子发生恢复的不同方案的研究。
    结果:13项研究调查了AAS滥用患者恢复精子发生的不同方案,符合纳入标准。显示精子发生恢复的可用药物包括可注射的促性腺激素,选择性雌激素受体调节剂,和芳香化酶抑制剂,但它们的使用在文献中描述仍然很少。
    结论:临床医生需要了解AAS对精子发生的有害影响。AAS相关的不孕症可能是可逆的,但是精子生产可能需要一年以上才能恢复正常。保守和积极的治疗都可以促进精子发生,并取得积极的结果。有必要进一步了解男性生殖内分泌学和AAS滥用后精子发生恢复领域的高质量数据。
    OBJECTIVE: This systematic review aims to evaluate the optimal treatment for male infertility resulting from Anabolic Androgenic Steroids (AAS) abuse.
    METHODS: A systematic review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. Studies that compared different protocols for the recovery of spermatogenesis in patients after AAS use were included.
    RESULTS: 13 studies investigating different protocols to restore spermatogenesis in patients with AAS abuse met the inclusion criteria. The available agents that showed restoration of spermatogenesis include injectable gonadotropins, selective estrogen receptor modulators, and aromatase inhibitors, but their use is still poorly described in the literature.
    CONCLUSIONS: Clinicians need to be aware of the detrimental effects of AAS on spermatogenesis. AAS-associated infertility may be reversible, but sperm production may take over a year to normalize. Both conservative and aggressive treatment can boost spermatogenesis with positive results. Further understanding of male reproductive endocrinology and high-quality data on the field of restoration of spermatogenesis after AAS abuse are warranted.
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  • 文章类型: Journal Article
    目的:分析亚甲基四氢叶酸还原酶(MTHFR)C677T多态性与男性不育的相关性。
    方法:2017年6月至2018年8月进行了病例对照研究,招募了88名不育者和40名可育者。进行了聚合酶链反应(PCR)-限制性片段长度多态性(RFLP)测定,以研究C677T多态性的等位基因频率。通过Pearsonchisquare检验评估了可育和不育组之间C677T基因座的等位基因和基因型频率的差异。逻辑回归模型用于计算赔率比和95%置信区间,P值<0.05被认为是显著的。使用HWE软件测试了Hardy-Weinberg平衡。
    结果:在不育受试者中,CC等位基因频率分布为(60.2%),CT等位基因是(30.7%),TT等位基因是(9.1%),在可育对照中,频率是CC等位基因(75%),CT等位基因(20%)和TT等位基因(5%)。分析显示,MTHFR677CC基因型与男性不育显着相关(p<.046,OR=2.385;95%CI=1.014-5.608);不育男性的CT(30.7%)和TT(9.1)基因型频率高于可育对照组的CT(20%)TT(5%),但统计学上没有显着差异(p=0.097;OR=0.455;CI=0.5179;CI=0.26-观察到年龄和BMI与MTHFR基因型和不孕症的显着关联。
    结论:我们的结果表明,MTHFRC677T多态性不是巴基斯坦人群男性不育的危险因素。
    OBJECTIVE: To analyze existence of an association between methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism with male infertility.
    METHODS: A case-control study was conducted from June 2017 to August 2018 in which 88 infertile and 40 fertile were recruited. Polymerase chain reaction (PCR) - restriction fragment length polymorphism (RFLP) assay was carried out to study the allelic frequency of C677T polymorphism. The differences in allelic and genotypic frequencies of C677T locus between fertile and infertile groups were evaluated by the Pearson chisquare test. A logistic regression model was used to calculate Odds ratios and 95% confidence intervals, p value<0.05 was considered significant. The Hardy-Weinberg equilibrium was tested using HWE software.
    RESULTS: In infertile subjects, frequency distribution of CC allele was (60.2%), the CT allele was (30.7%) the TT allele was (9.1%) and in the fertile controls the frequency was CC allele (75%), CT allele (20%) and TT allele (5%) respectively. Analysis revealed MTHFR 677 CC genotype associated significantly with male infertility (p<.046, OR=2.385; 95% CI=1.014-5.608); Frequency of CT (30.7%) and TT (9.1) genotypes were higher in infertile men as compared to CT (20%) TT (5%) in fertile controls but statistically these were not significantly different (p=0.097; OR=0.455; CI=0.179-1.153 and p=0.431; OR=0.526; CI=0.107-2.599 respectively). Significant association of age and BMI with MTHFR genotypes and infertility was observed.
    CONCLUSIONS: Our results showed that MTHFR C677T polymorphism is not a risk factor for male infertility in our Pakistani population.
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  • 文章类型: Journal Article
    Chronic exposure to fluoride causes tissue damage induced by oxidative imbalance, Cyperus esculentus (CE) possess anti-inflammatory and immunostimulatory properties. This study focused on Salutary role of Cyperus esculentus in sodium fluoride (NaF) induced testicular degeneration and sperm quality deteriorations.
    Sexually mature male Sprague-Dawley rats were randomly divided into four groups (n=6). Animals in control group received 2 mls of normal saline per day; CE group received 500mg/kg bw of CE; NaF group received 5mg/kg bw of NaF; NaF+CE group received 500mg/kg bw of CE (for 14 days pre-treatment) and NaF co-treatment till 56 days via gastric gavage. Parameters tested include: testicular histology, sperm parameters, sex hormone, fertility test, malondialdehyde (MDA), superoxide dismutase (SOD), reduced glutathione, glutathione peroxidase (GPX), catalase (CAT), testicular fluoride and testicular cholesterol.
    Sodium fluoride significantly (p<.05) decrease testicular antioxidant (SOD, CAT, GSH and GPx), sperm quality, hormone profiles (TT, FSH, LH, estrogen levels), testicular cholesterol, morphometric parameters, Johnsen\'s Score and number of implantations in female rats with corresponding (p<.05) increase in oxidative stress makers and abnormal sperm morphology. Also depleted seminiferous epithelium and degenerate spermatogenic cells. Pretreatment with 500mg/kg bw of CE lowered NaF toxicity by significantly reducing the lipid peroxidation products, fluoride accumulation in the testis, histopathological changes of the testes and spermatozoa abnormalities and reverted observed NaF-induced inhibition in antioxidant parameters and weight of accessory sex organs.
    Cyperus esculentus attenuated NaF-induced testicular injuries and protected the seminiferous epithelium, reduced oxidative stress and promoted spermatogenesis.
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    文章类型: Comparative Study
    BACKGROUND: Epidemiological studies treat testicular germ cancer as a single disease, the behavior of the two histological types of cancer; seminoma and nonseminoma have differences in reproductive hormone secretion and impair fertility differently.
    OBJECTIVE: To demonstrate that the serum concentration of pituitary hormones involved in fertility and spermatogenesis in the affected male is different in the two histological types.
    METHODS: Were determined by radioimmunoassay or inmunoradiometric assay, luteinizing hormone, follicle stimulating hormone, total testosterone, prolactin, estradiol, human chorionic gonadotropin and alpha fetoprotein in 37 patients with germ cell cancer (15 seminoma and 22 nonseminoma) and 35 controls. We analyzed the semen of patients, and were questioned about paternity before the cancer diagnosis.
    RESULTS: Age was higher in patients with seminoma cancer, showed decreased luteinizing hormone, follicle stimulating hormone, and testosterone and increased estradiol and prolactin in nonseminoma compared with seminoma. In patients with nonseminoma they had 9 children, 5 were oligozoospermic, 3 azoospermic and 6 normal concentration, 8 did not provide sample, seminoma group they had eight children, only one azoospermic, nine normal concentration, and 5 did not provide sample .
    CONCLUSIONS: The hormonal behavior is different in men with nonseminoma compared with seminoma, so that the negative impact on the reproductive axis and fertility is higher in cases of non-seminoma.
    Antecedentes: los estudios epidemiológicos tratan al cáncer germinal de testículo como una sola patología, el comportamiento de los dos tipos histológicos: el seminoma y no seminoma tienen diferencias en la secreción de hormonas reproductivas y alteran la fertilidad de forma diferente. Objetivo: demostrar que la concentración sérica de las hormonas hipofisarias que intervienen en la fertilidad y espermatogénesis en el varón afectado es diferente en los dos tipos histológicos. Material y métodos: estudio clínico, prospectivo, transversal, comparativo de tres grupos de pacientes. Por medio de radioinmunoensayo o ensayo inmunorradiométrico se determinaron las concentraciones de: hormona luteinizante, hormona folículo estimulante, testosterona total, prolactina, estradiol, gonadotropina coriónica humana y alfa feto proteína en suero de 37 pacientes (15 seminoma, y 22 no seminoma) y 35 controles. Se analizó el semen de los pacientes y se les interrogó acerca de su satisfacción de paternidad antes del diagnóstico de cáncer. Resultados: los pacientes con cáncer tipo seminoma fueron de mayor edad, se encontró disminución de: hormona luteinizante, hormona folículo estimulante y testosterona; aumento de: estradiol y prolactina en cáncer no seminoma, en comparación con seminoma. En los pacientes con no seminoma 9 ya tenían hijos, 5 eran oligozoospérmicos, 3 azoospérmicos y 6 con concentración normal 8 no proporcionaron muestra; en el grupo de seminona, 8 ya tenían hijos, sólo 1 azoospérmico; 9 concentración normal, y 5 no proporcionaron muestra. Conclusiones: el comportamiento hormonal es diferente en los hombres con cáncer no seminoma en comparación con los de seminoma, por lo que la repercusión negativa en el eje reproductor y fertilidad es mayor en los casos de no seminoma.
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