RESUMEN
Genetic predisposition may play an important role in the development of fibromyalgia syndrome (FMS). Serotonin is known to be involved in pain modulation and serotonin-1A receptor plays a considerable role in determining the central 5-HT tone. Consequently, variation in 5-HT1A receptor gene (HTR1A) may be responsible for inter-individual variability in pain sensitivity and other clinical symptoms of FMS. Therefore, the objectives of this research work were to study the gene polymorphism of 5-HTR1A gene and to explore the correlation between rs6295 genotype (-1019C/G HTR1A) and duration of pain, pain intensity and pain related depression and anxiety, if any, in FMS. 5-HTR1A genotype for the C(-1019)G polymorphism was typed in 62 patients with FMS and 42 healthy subjects. Present pain intensity, components of pain and pain related depression and anxiety were assessed using the numerical pain rating scale, McGill pain questionnaire and Hamilton depression and anxiety rating scale respectively. 5-HTR1A gene was represented by three different genotypes, homozygous C/C, heterozygous C/G and homozygous G/G. Analysis of the 5-HTR1A gene showed a frequency of 58%, 31% and 11% for the C/C, C/G and G/G genotypes, respectively in FMS group. This proportion was 69%, 23% and 8% in healthy subjects. No significant correlation was observed between 5-HTR1A gene polymorphism and pain and related symptoms in FMS patients. To the best of our knowledge this is the first study which investigated the correlation between the 5-HTR1A gene polymorphism and pain intensity, the affective component of pain, pain related depression and anxiety in FMS.
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Fibromialgia , Serotonina , Fibromialgia/genética , Genotipo , Humanos , Dolor/genética , Polimorfismo de Nucleótido Simple , Receptor de Serotonina 5-HT1A/genéticaRESUMEN
Retraction: 'Aetiology and clinical profile of children with 46, XY differences of sex development at an Indian referral centre' by Vasundhera Chauhan, Rima Dada, Vandana Jain The above article, published online on 8 August 2016 in Wiley Online Library (http://wileyonlinelibrary.com), has been retracted by agreement between the authors, the Journal Editors-in-Chief, Wolf-Bernhard Schill and Ralf Henkel, and Blackwell Verlag GmbH. The retraction has been agreed as the result of an unresolved dispute between the first author and a colleague research fellow due to the inclusion of data from patients who were simultaneously enrolled in two studies being conducted separately by the two parties. Reference Chauhan, V., Dada, R. and Jain, V. (2016), Aetiology and clinical profile of children with 46, XY differences of sex development at an Indian referral centre. Andrologia. doi:10.1111/and.12663.
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The protective role of gallic acid (GA) on reproductive toxicity induced by cyclophosphamide (CPA), an antineoplastic drug, was investigated in male Wistar rats. Sixty rats were grouped into 10 rats per group. Group 1 (control) received distilled water. Rats in groups 2 and 3 received GA alone at 60 and 120 mg kg(-1) for 14 consecutive days, respectively. Group 4 received a single intraperitoneal dose of CPA at 200 mg kg(-1) on day 1. Groups 5 and 6 received a single dose of CPA (200 mg kg(-1) ) intraperitoneally on day 1 followed by treatment with GA at 60 and 120 mg kg(-1) for 14 consecutive days, respectively. In testes and epididymis of the treated rats, CPA administration resulted in significant elevation (P < 0.05) in malondialdehyde (MDA), nitrite and hydrogen peroxide levels. There was a significant decrease in the activities of superoxide dismutase and glutathione-S-transferase. Furthermore, there were significant reductions in plasma luteinising hormone (LH), follicle stimulation hormone (FSH) and testosterone levels, which were accompanied by significant decrease in sperm motility and viability in CPA-treated rats. Histological examination revealed marked testicular and epididymal atrophy in CPA alone treated rats and these aberrations were reversed by GA. In conclusion, GA has capacity to protect against reproductive toxicity induced by cyclophosphamide.
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Epidídimo/efectos de los fármacos , Ácido Gálico/farmacología , Motilidad Espermática/efectos de los fármacos , Espermatozoides/efectos de los fármacos , Testículo/efectos de los fármacos , Animales , Antineoplásicos Alquilantes/administración & dosificación , Antineoplásicos Alquilantes/toxicidad , Supervivencia Celular , Ciclofosfamida/administración & dosificación , Ciclofosfamida/toxicidad , Epidídimo/metabolismo , Hormona Folículo Estimulante/sangre , Ácido Gálico/administración & dosificación , Glutatión Transferasa/metabolismo , Inyecciones Intraperitoneales , Hormona Luteinizante/sangre , Masculino , Malondialdehído/análisis , Ratas , Ratas Wistar , Espermatozoides/fisiología , Superóxido Dismutasa/metabolismo , Testículo/metabolismo , Testosterona/sangreRESUMEN
Telomeres, noncoding hexameric tandem repeats located at the ends of chromosomes, maintain chromosome stability and genome integrity. These guanine-rich repeats are highly conserved during evolution, and their role is dependent on their length and structure. They have multiple functions, including regulating the reproductive lifespan by mediating synapsis and homologous recombination of the chromosomes. Short telomeres result in meiotic arrest, segregation abnormalities and dysjunction, which lead to an increased incidence of aneuploid germ cells. In addition, shortened telomeres in men result in apoptosis of germ cells, whereas, in women, they result in meiotic arrest. In somatic cells, telomere shortening occurs at each consecutive round of replication, which induces senescence in vitro and in vivo. However there is a 2-fold elongation of telomeres during spermatogenesis. Spermatozoa, are terminally differentiated cells, have longer telomeres than spermatogonia and pachytene spermatocytes. In addition to genetic factors, lifestyle factors and psychological stress also play crucial role in modulating telomere length. Because not much is known about its role in reproduction, we focused this review on the function, structure and length dynamics of the telomere in the reproductive process.
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Telómero/fisiología , Femenino , Humanos , Masculino , Reproducción/genética , Reproducción/fisiología , Espermatogénesis/genética , Espermatozoides/fisiología , Proteínas Similares a la Proteína de Unión a TATA-Box , Telómero/ultraestructuraRESUMEN
PURPOSE: Yq microdeletions are the leading genetic cause of male infertility and its detection is clinically relevant for appropriate genetic counseling. We aimed to determine the prevalence and type of Yq microdeletions, the associated seminal phenotypes and the STS markers that are relevant for its testing in Indian population. METHODS: Yq microdeletion analysis was carried out in 1,636 infertile cases in our centers. Additional data was collected from published studies in Indian population leading to a total of 3,647 cases. RESULTS: In our cohort, 3.4 % (56/1,636) of infertile men had Yq microdeletions. Combining the data from other published studies identified 215/3,647 (5.8 %) infertile individuals to harbor Yq microdeletions; with 6.4 % in azoopsermia, 5.8 % in oligozoospermia and 3.2 % in oligoasthenozoospermia and teratozoospermia cases. No significant differences in the deletion frequencies were observed between idiopathic vs non idiopathic cases (5.8 vs 8.6 % respectively). Deletions of AZFc were at highest frequency (46.6 %) with double deletions most commonly observed in azoospermic subjects. With respect to the STS markers, screening with the six European Academy of Andrology (EAA) markers would miss 3.1 % of cases; additional non EAA markers that would contribute significantly to screening are sY746, sY82, sY121, sY128, sY130, sY143, sY145 & sY160. INTERPRETATIONS AND CONCLUSIONS: The frequency of Yq microdeletions is lower in Indian population as compared to Western counterparts. There is no major association of Yq microdeletions with seminal parameters or cause of infertility. Clinically it will be necessary to offer Yq microdeletion testing to all the classes of infertile men. The EAA markers may not be adequate to detect microdeletions in Indian infertile men.
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Cromosomas Humanos Y , Infertilidad Masculina/genética , Trastornos de los Cromosomas Sexuales del Desarrollo Sexual/genética , Adulto , Azoospermia/diagnóstico , Azoospermia/genética , Azoospermia/patología , Deleción Cromosómica , Cromosomas Humanos Y/genética , Humanos , India , Infertilidad Masculina/diagnóstico , Infertilidad Masculina/patología , Masculino , Oligospermia/diagnóstico , Oligospermia/genética , Oligospermia/patología , Aberraciones Cromosómicas Sexuales , Trastornos de los Cromosomas Sexuales del Desarrollo Sexual/patologíaRESUMEN
PURPOSE: Telomere length plays a significant role in various disorders; however, its role in idiopathic recurrent pregnancy loss (iRPL) is not known. The objective of this study was to assess telomere length in peripheral blood leukocytes in couples experiencing unexplained recurrent pregnancy loss (iRPL). METHODS: The study included 25 couples experiencing iRPL and 20 controls. The mean relative telomere length was measured by quantitative Real Time PCR (Q-PCR) based assay, which measures the average ratio of telomere repeat copy number to a single copy gene (36B4) copy number (T/S ratio) in each sample. RESULTS: The relative leukocyte mean telomere length (T/S) in both men and women from iRPL group was significantly lower (p < 0.05) when compared to controls. A significant (P < 0.05) negative correlation was found between age and leukocyte telomere length (T/S ratio). Among the sperm parameters seminal volume was found to be negatively (r = -0.4679) associated with the telomere T/S ratio. The DNA fragmentation index of sperm showed positive correlation (r = 0.4744) with telomere length. In this preliminary study, we found that shorter telomere length in both men and women may be associated with early pregnancy loss. CONCLUSION: In conclusion, shorter telomere length in both male and female partners appears to play a role in the idiopathic recurrent pregnancy loss. Loss of telomeric DNA due to oxidative stress needs further analysis. Analysis of telomere length in germ cells are needed to further substantiate the findings of this study.
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Aborto Habitual/genética , Leucocitos/citología , Homeostasis del Telómero/genética , Aborto Habitual/etiología , Aborto Habitual/patología , Adulto , Femenino , Humanos , Masculino , Estrés Oxidativo/genética , Embarazo , Espermatozoides/patología , Telómero/genéticaRESUMEN
PURPOSE: Telomeres are multifunctional nucleoprotein domains with hexanucleotide tandem repeat (5' TTAGGG 3') sequences, which cap the chromosome ends. However, the role of telomere and its length in sperm with regard to fertility remains unknown. METHODS: In this pilot study, we analyzed 32 idiopathic infertile men and 25 controls for sperm telomere length by quantitative polymerase chain reaction (Q-PCR), and correlated it with sperm DNA fragmentation index (DFI) and reactive oxygen species (ROS) levels. RESULTS: The relative sperm mean telomere length (T/S) of infertile men was found to be significantly lower (p < 0.005) when compared to controls (0.674 ± 0.028 vs. 0.699 ± 0.030). None of the sperm parameters such as sperm count, forward motility, morphology, ROS, and DFI were found to correlate with the sperm telomere length. CONCLUSION: Shorter telomeres in sperm may be one of the causative factors responsible for male infertility, but further detailed studies are needed to confirm these findings.
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Fragmentación del ADN , Infertilidad Masculina/patología , Espermatozoides/patología , Telómero/patología , Estudios de Casos y Controles , Humanos , Infertilidad Masculina/metabolismo , Masculino , Proyectos Piloto , Especies Reactivas de Oxígeno/metabolismo , Semen/metabolismoRESUMEN
Introduction: MTHFR being a key regulatory enzyme of 1-carbon metabolism pathway serves critical function of generation of SAM, replenishment of glutathione and nucleotide synthesis and finally methylation of the bio molecules. MTHFR gene mutation is a rare au-tosomal recessive inborn error of metabolism and presents with severe hyperhomocysteinemia. MTHFR polymorphisms on the other hand are commonly encountered of which two 677 C>T and 1298 A>C have been most widely studied and reported to increase the vulnerability to neural tube defects, congenital heart disease, various neuropsychiatric disorders like autism spectrum diseases and attention deficit hyperactiv-ity disease, cleft lip/ palate, acute leukaemia, cardiovascular diseases, occlusive vascular disease in children. Methods: We conducted this prospective clinical trial to examine whether yoga practice can up regulate MTHFR gene expression. Considering the prevalence of MTHFR polymorphism, varied spectrum of its implications in disease causation including male infertility, we conducted the trial involving 30 infertile men who underwent 3 weeks of supervised YBLI. Pre and post intervention assessment of the blood and semen sample was done to see the effects. Results: We have found more than fivefold up-regulation in the expression of MTHFR gene with significant reduction of seminal free radical levels after 3 weeks of yoga practice. Interestingly we noticed significantly higher MTHFR polymorphic variants in infertile male patients compared to healthy fertile controls. Conclusion: MTHFR polymorphisms are also independently associated with many paediatric diseases. Diagnosing MTHFR deficiency in children is a challenging job and requires high index of suspicion and continuous vigilance. Yoga based lifestyle may be adopted both by parents planning conception and also by adolescent children who are sufferers of this condition to halt the consequences of mild to moderate MTHFR deficiency.
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Yoga , Adolescente , Niño , Humanos , Masculino , Costo de Enfermedad , Genotipo , Metilenotetrahidrofolato Reductasa (NADPH2)/genética , Padres , Polimorfismo de Nucleótido SimpleRESUMEN
Background: Variable insertions of Palmaris longus (PL) muscle tendon is described by various authors. Presence of extra PL tendon is also described in literature. As autologus tendon grafting is a blooming arena of clinical research at present time, an additional tendinous slip of PL has promising scope for use as an autograft. Case Report: We report here bilateral bitendinous distal attachment of PL muscle encountered during routine cadaveric dissection. The additional PL tendon in a multitendinous insertion pattern with optimum length and thickness is indeed an additional advantage from the point of view of autograft harvesting. This has also importance in understanding the unusual, altered symptomatology in compressive conditions. Conclusion: Although relatively common, surgeons should be well aware of the various possible aversion of distal attachment of PL which might have significant impact in alteration of symptomatology of neurovascular compressions in the forearm and hand and while choosing an appropriate tendon autograft.
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Antebrazo , Transferencia Tendinosa , Humanos , Antebrazo/cirugía , Tendones , Músculo Esquelético , MuñecaRESUMEN
Background: The fibula is a long bone located at the lateral aspect of the leg. Diaphysis of fibula is supplied by one or more nutrient arteries through an opening referred to as the nutrient foramen. Mor-phometric studies of the nutrient foramina of fibulae are very sparse in literature. Materials and Methods: This cross-sectional descriptive study was conducted on 51 dry adult human fibulae housed in the department of anatomy, AIIMS, New Delhi. Total fibular length along with the number and location of all nutrient foramina present were recorded. Foraminal indexes (FI) of the fibulae were calculated as well. Results: The study revealed that the average length of fibulae was 35.48 ± 1.76 cm. 94% fibulae had a single nutrient foramen and 6 % had two. In fibula with single foramen, the most common location was on the medial crest (50%), followed by between medial crest and posterior border (35%), between the medial crest and interosseous border (8%) and on posterior border (6%). Nutrient foramen was located in middle 1/3rd of shaft in 98 % and in inferior 1/3rd of shaft in 2 % of fibulae. The average foraminal index was 44.85 ± 6.67% with a range of 35.7 to 63.8%. Conclusion: Most common location of nutrient foramen in fibula is middle 1/3rd of shaft on the medial crest with dual nutrient foramina in 6% of fibulae. These parameters show variability in different geographical location and population groups. These data may be helpful for anthropologists, forensic experts, radiologists and might guide in harvesting vascularised fibular bone graft.
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Relevancia Clínica , Peroné , Adulto , Humanos , Peroné/irrigación sanguínea , Estudios Transversales , NutrientesRESUMEN
Infertility affects about 15-20% couples attempting pregnancy and in about half cases the problem lies in the male. Among the sperm parameters, linear progressive motility is one of the most important predictors of fertility potential. Though genetic and chromosomal abnormalities are important aetiological factors in the pathogenesis of male infertility, the mechanism involved in impaired sperm motility is poorly understood. Here we report mitochondrial DNA (mtDNA) mutations with increased seminal reactive oxygen species (ROS) levels and higher DNA fragmentation level in the sperm resulting in decreased ATP production which plays an important role in sperm motility defect. Thus it is important to understand the aetiology of asthenozoospermia and to distinguish if infertile men harbour nuclear or mtDNA mutation as they are very important prognostic markers. This case study also highlights that routine semen parameters are very modest predictors of fertility outcome but ROS estimation and DNA integrity analysis by Comet assay have better diagnostic and prognostic capabilities. Thus this study is a detailed and comprehensive workup of an infertile asthenozoospermic male.
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Astenozoospermia/fisiopatología , Inyecciones de Esperma Intracitoplasmáticas , Adulto , Cromosomas Humanos Y , Ensayo Cometa , ADN Mitocondrial/genética , Humanos , Masculino , Especies Reactivas de Oxígeno/metabolismo , Semen/metabolismo , Resultado del TratamientoRESUMEN
BACKGROUND & OBJECTIVES: The growing concern on transmission of genetic diseases in assisted reproduction technique (ART) and the lacunae in the conventional semen analysis to accurately predict the semen quality has led to the need for new techniques to identify the best quality sperm that can be used in assisted procreation techniques. This study analyzes the sperm parameters in the context of DNA damage in cytogenetically normal, AZF non deleted infertile men for DNA damage by comet assay. METHODS: Seventy infertile men and 40 fertile controls were evaluated for the semen quality by conventional semen parameters and the sperms were also analyzed for DNA integrity by comet assay. The patients were classified into oligozoospermic (O), asthenozoospermic (A), teratozoospermic (T), oligoasthenoteratozoospermic (OAT) categories and infertile men with normal semen profile. The extent of DNA damage was assessed by visual scoring method of comets. RESULTS: Idiopathic infertile men with normal semen profile (n=18) according to conventional method and patients with history of spontaneous abortions and normal semen profile (n=10) had high degree of DNA damage (29 and 47% respectively) as compared to fertile controls (7%). The O, A, T and OAT categories of patients had a variably higher DNA damage load as compared to fertile controls. INTERPRETATION & CONCLUSION: The normal range and threshold for DNA damage as a predictor of male fertility potential and technique which could assess the sperm DNA damage are necessary to lower the trauma of couples experiencing recurrent spontaneous abortion or failure in ART.
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Ensayo Cometa , ADN/genética , Infertilidad Masculina/genética , Técnicas Reproductivas Asistidas , Humanos , Masculino , Reacción en Cadena de la Polimerasa , PronósticoRESUMEN
Excess reactive oxygen species (ROS) beyond the scavenging capacity of antioxidants leads to DNA damage and oxidation of lipoprotein components at the cellular and subcellular level. The oxidative stress (OS) adversely affects sperm function by altering membrane fluidity, permeability and impairs sperm functional competence. In the present study, the OS status in seminal plasma and blood serum in infertile men and its relationship with spermatozoa parameters have been investigated. Four groups of infertile men viz., oligozoospermic (n = 15), asthenozoospermic (n = 17), teratozoospermic (n = 19), and oligoasthenoteratozoospermic (n = 9), and healthy fertile controls (n = 40) have been analyzed for superoxide dismutase (SOD), catalase (CAT), glutathione (GSH) and malondialdehyde (MDA) in seminal plasma and blood serum. Significant correlation between blood serum SOD and sperm count has been observed in patients (p = 0.018) and controls (p = 0.021). Similarly, significant correlation between blood serum GSH and sperm progressive motility in patients (p = 0.036) and controls (p = 0.029) is observed. The low seminal MDA is associated with increase in sperm progressive motility in patients (p = 0.039) and controls (p = 0.028). Positive correlation is found between increased seminal MDA levels and abnormal sperm morphology in both patients and controls (r = 0.523, p = 0.029; r = 0.612, p = 0.034 respectively). Correlations between blood SOD and sperm count and between blood GSH levels and progressive motility suggest that these can be important biochemical markers in assaying the sperm count and motility. A negative correlation of motility with seminal MDA indicates that sperm membrane lipid peroxidation affects the fluidity and thus mobility of sperm axoneme. This affects functional competence of the sperm and acts like a biological safeguard. The results of the present study suggest the prospects of using the blood serum and seminal plasma antioxidants as a valuable tool to evaluate the sperm reproductive capacity and functional competence.
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Antioxidantes/metabolismo , Infertilidad Masculina/metabolismo , Semen/metabolismo , Estudios de Casos y Controles , Humanos , Infertilidad Masculina/sangre , MasculinoRESUMEN
Accurate transmission of information coded in the sperm genome is vital to the pre- and post-natal development of the offspring. Recent advances in reproductive biology have proposed evaluation of sperm DNA integrity as an important assessment tool to infer the presence of DNA strand breaks, numerical abnormalities in sperm chromosome complement, and alterations in the epigenetic regulation of the paternal genome. Oxidative stress (OS), characterized by increased free radicals, may lead to the production of apurine sites, apyrimidine sites, oxidation of nucleotides of sperm genome. This study was performed to assess the impact of OS on DNA integrity in sperms. 52 infertile men [oligozoospermic-13, asthenozoospermic-15, teratozoospermic-19, oligoasthenoteratozoospermic-5] and 20 fertile controls were investigated for products of lipidperoxides as malondialdehyde; antioxidants such as superoxide dismutase, catalase and glutathione in seminal plasma by biochemical methods. DNA integrity of the sperms was analyzed by visual scoring method in which the comets were graded into 4 categories (A-D) on the basis of their tail length indicative of increasing levels of DNA damage. Significant increase in DNA damage (higher number of sperms in group D) in cases (oligozoospermic (O)-20%, asthenozoospermic (A)-24%, teratozoospermic (T)-28%, OAT-43%) as compared to controls (8%) was found. Increased malondialdehyde levels, abnormal sperm morphology and higher DNA damage were observed in the cases. The antioxidants superoxide dismutase, catalase and glutathione had a positive association with sperm count and motility while a negative association with the percentage of dead sperms and abnormal morphology was observed. This study highlights the influence of low antioxidants on sperm genome integrity and indicates sperm DNA integrity as a better and more reliable prognostic tool for infertility evaluation than simple quantitative and morphologic evaluation of spermatozoa.
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Antioxidantes/metabolismo , Daño del ADN , Infertilidad Masculina/genética , Infertilidad Masculina/metabolismo , Semen/metabolismo , Adulto , Estudios de Casos y Controles , Catalasa/metabolismo , Ensayo Cometa , ADN/genética , ADN/metabolismo , Glutatión/metabolismo , Humanos , Infertilidad Masculina/patología , Masculino , Malondialdehído/metabolismo , Recuento de Espermatozoides , Motilidad Espermática , Espermatozoides/anomalías , Espermatozoides/metabolismo , Superóxido Dismutasa/metabolismo , Adulto JovenRESUMEN
Infertility affects about 15 per cent married couples half of which may be attributed to men with low sperm motility (asthenozoospermia), low sperm count (oligozoospermia) or abnormal sperm morphology (teratozoospermia). As mitochondria are the energy source for initiation, differentiation and function of the germ cells, mutation in mitochondrial genome can impair the formation of mature spermatozoa. Mutations in mitochondrial genome are identified in patients with fertility problems. However, mitochondria are also both the source and target of reactive oxygen species (ROS). ROS are normally generated at low levels by human spermatozoa in order to perform its physiological function. However, if the generation of these reactive free radicals overwhelm the antioxidant defense system, this can lead to oxidative stress, which is characterized by mitochondrial and nuclear genome damage. So both ROS and mtDNA mutations are considered to be the major aetiological factors in a variety of human diseases including male infertility. Identification of novel mutations in mtDNA of infertile patients with supraphysiological levels of ROS are considered to be important to gain better understanding of the aetiology of idiopathic infertility. Early detection and prompt antioxidant therapy can prevent ROS induced DNA damage. This has far reaching impact if such men opt for assisted reproductive technology (ART)/in vitro fertilization.
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ADN Mitocondrial/metabolismo , Infertilidad Masculina/metabolismo , Mutación/genética , Estrés Oxidativo/genética , Especies Reactivas de Oxígeno/metabolismo , Espermatogénesis/fisiología , ADN Mitocondrial/genética , Humanos , Infertilidad Masculina/genética , Masculino , Fosforilación Oxidativa , Espermatogénesis/genéticaRESUMEN
Reactive oxygen species (ROS) levels in semen are believed to play both physiological and pathological roles in male fertility. The study was aimed to find the clinical significance of ROS levels in infertile Indian men. This pilot study included 33 idiopathic infertile men and 18 proven fertile controls. ROS levels in the washed sperm were measured using chemiluminescence assay and expressed as 10(6) cpm per 20 million spermatozoa. Sperm count, percent sperm motility, and percent normal sperm morphology were found to be significantly (P < 0.0001) reduced in infertile men compared with the controls. Median (minimum, maximum range) ROS levels of the infertile group [24.90 (6.89, 44.71)] were found to be significantly (P < 0.0001) elevated compared with the fertile controls [0.167(0.15, 2.78)]. No significant correlation was seen between ROS levels and semen parameters. Elevated ROS levels in the idiopathic Indian infertile men may be one of the underlying reasons for impaired fertility. Therefore measurement of seminal ROS levels may be used in Indian infertile men for better understanding of the aetiology and selection of antioxidant regimen in the treatment of male infertility. However, large studies may be urgently warranted to find out the role of antioxidants in ROS elevated Indian infertile men through randomised, controlled clinical study.
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Infertilidad Masculina/etiología , Especies Reactivas de Oxígeno/metabolismo , Análisis de Semen , Semen/fisiología , Daño del ADN , Humanos , India , Infertilidad Masculina/metabolismo , Masculino , Proyectos Piloto , Recuento de Espermatozoides , Motilidad Espermática , Espermatozoides/citología , Espermatozoides/metabolismoRESUMEN
Diagnosis of sperm DNA integrity of semen sample is important for consistently high reproductive efficiency. The conventional parameters of semen analysis take into account morphology, motility, and concentration of spermatozoa in the sample, which are insufficient for evaluation of reproductive potential. Current studies have implicated abnormal organization of genomic material in sperms as a probable cause in 20 per cent cases of male infertility. This is especially important in the era of assisted reproduction technique (ART) when a majority of infertile couples opt for assisted reproduction and in where cases DNA integrity is a better diagnostic and prognostic marker as compared to routine semen analysis. This article reviews and discusses some of the current techniques employed for evaluating chromatin structure or DNA damage in spermatozoa. These different techniques include single cell gel electrophoresis (COMET assay), Terminal tranferase dUTP Nick End Labelling (TUNEL), sperm chromatin structure assay (SCSA), In situ nick translation (ISNT) and acridine orange test. These techniques are independent measure of sperm quality and assist in semen quality assessment by detecting defects in DNA integrity or chromatin structure. The discussed techniques vary in their level of accuracy, cost input, sophistication of analysis and their application depends upon the sensitivity required for analysis. The article also briefly outlines the DNA packaging and the causes of DNA damage in spermatozoa. During chromatin packing 85 per cent of the histones are replaced by protamine while the residual histones act as marker of genes which are expressed in early embryonic development. Among the different aetiological factors observed to be responsible for DNA damage in human spermatozoa increased reactive oxygen species (ROS), oxidative stress is highly correlated with greater DNA fragmentation index (DFI). Oxidative stress leads to single and double strand breaks in sperm DNA. Apoptosis and abnormal chromatin packing also contribute to DNA damage. The significance of chromatin structure studies is more stressed owing to the greater awareness to transmission of genetic diseases because of higher incidence of gene imprinting defects, increased cancer frequency and other congenital and non-congenital defects in children conceived through assisted reproduction techniques.
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Núcleo Celular/metabolismo , Daño del ADN , Técnicas Reproductivas Asistidas , Espermatozoides/metabolismo , Cromatina/metabolismo , Ensayo Cometa , Femenino , Humanos , Infertilidad Masculina/terapia , Masculino , Embarazo , Índice de Embarazo , Especies Reactivas de Oxígeno , Resultado del TratamientoRESUMEN
Pregnancy places a very high demand on physical, physiological and immunological responses of females,especially when aggravated by parasitic infestation. There is strong evidence that maternal infestations with helminth haveprofound effects on immunity to helminths and other pathogens. This case-control study involved 245 pregnant women aged18-40 years (>30 weeks of gestation) recruited from three secondary level hospitals in Ibadan, Nigeria. Morning stoolsamples collected from pregnant women were examine for intestinal helminths using formol-ether concentration method. Atotal of 38 participants comprising 17 Helminth Positive (HP) and 21 Helminth Negative (HN) pregnant women werepurposely selected for the study. Sera from these women (38) and their babies' cord (38) were analysed for immune factors[interleukins 6 and 8 (IL-6, IL-8), tumor necrosis factor-alpha (TNF-α) and immunoglobulin E (IgE)] were analyzed usingELISA. Anthropometric indices [weight and height in mothers and babies and Chest Circumference (CC) in babies] weremeasured using standard methods. Data were subjected to descriptive statistics and analysed using Student t-test and Pearsoncorrelation at α0.05. Only Ascaris lumbricoides was found in the 17 (6.9%) infested pregnant women. The mean levels of IL-6 (57.8 ± 32.8 vs 52.8±39.6 pg/mL), IL-8 (24.3±3.5 vs 22.0±7.1 pg/mL) and IgE (333.3±96.6 vs 242.3±96.8 IU/mL) weresimilar in HP when compared with HN. In cord sera, IL-8 level was significantly higher in babies of HP (23.7±3.9 pg/mL)compared with babies of HN (20.1±5.9 pg/mL). The levels of IL-6, TNF-α and nutritional indices in HP had significantpositive correlation with corresponding levels in babies of HP mothers. Only CC was significantly lowered in babies of HPcompared with HN mothers. Other anthropometric indices were not significantly different. Therefore, this present studysuggests that helminth infestation may lead to strong Th2 immune responses as is reflected by the cytokine levels of mothersand babies as well as anthropometric measurements of babies of infested mothers. The outcomes of this study provide basisto deworm pregnant women during pregnancy.