Comparison of intracytoplasmic sperm injection (ICSI) outcomes in infertile men with spermatogenic impairment of differing severity / 亚洲男科学杂志(英文版)

The extent of spermatogenic impairment on intracytoplasmic sperm injection (ICSI) outcomes and the risk of major birth defects have been little assessed. In this study, we evaluated the relationship between various spermatogenic conditions, sperm origin on ICSI outcomes, and major birth defects. A total of 934 infertile men attending the Center for Reproductive Medicine of Ren Ji Hospital (Shanghai, China) were classified into six groups: nonobstructive azoospermia (NOA; n = 84), extremely severe oligozoospermia (esOZ; n = 163), severe oligozoospermia (sOZ, n = 174), mild oligozoospermia (mOZ; n = 148), obstructive azoospermia (OAZ; n = 155), and normozoospermia (NZ; n = 210). Rates of fertilization, embryo cleavage, high-quality embryos, implantation, biochemical and clinical pregnancies, abortion, delivery, newborns, as well as major birth malformations, and other newborn outcomes were analyzed and compared among groups. The NOA group showed a statistically lower fertilization rate (68.2% vs esOZ 77.3%, sOZ 78.0%, mOZ 73.8%, OAZ 76.6%, and NZ 79.3%, all P < 0.05), but a significantly higher implantation rate (37.8%) than the groups esOZ (30.1%), sOZ (30.4%), mOZ (32.6%), and OAZ (31.0%) (all P < 0.05), which was similar to that of Group NZ (38.4%). However, there were no statistically significant differences in rates of embryo cleavage, high-quality embryos, biochemical and clinical pregnancies, abortions, deliveries, major birth malformations, and other newborn outcomes in the six groups. The results showed that NOA only negatively affects some embryological outcomes such as fertilization rate. There was no evidence of differences in other embryological and clinical outcomes with respect to sperm source or spermatogenic status. Spermatogenic failure and sperm origins do not impinge on the clinical outcomes in ICSI treatment.

Evaluación de los parámetros seminales en pacientes con sospecha de infertilidad en Cochabamba, Bolivia / Assessment of the sperm parameters in patients with suspected of infertility in Cochabamba, Bolivia

Objetivo: evaluar los parámetros seminales en varones con sospecha de infertilidad. Métodos: se analizaron 138 muestras seminales. La evaluación se realizó mediante análisis seminal según criterios de la OMS 2010. Resultados: la edad de los pacientes estaba comprendida entre los 20 a 57 años, con un promedio de 32,8 ± 6,7. El 61,6 % de los pacientes tenían normozoospermia, 9,4 % tenían azoospermia y 0,7% aspermia, el 28,3% presentaron uno o más parámetros alterados (4,3% presentaron alteración en volumen, 5,1% alteración en concentración espermática, 6,5% alteración en movilidad, 0,7% alteración en morfología y 0,7% alteración en vitalidad, el 11% presento más de una alteración). Se observó diferencia significativa entre muestras normozoospermicas y con alteración: en volumen (p=0,02), en la concentración espermática, N° total de espermatozoides, total de espermatozoide motiles (TEM), motilidad espermática, vitalidad y morfología normal con un valor de (p=0,00). Conclusiones:el estudio muestra que, a mayor edad, existe un incremento en las alteraciones seminales. Los parámetros seminales como volumen, concentración, vitalidad, motilidad progresiva y morfología, muestran un alto porcentaje de anormalidad. Siendo la movilidad progresiva el parámetro más afectado.

Objetives: evaluate seminal parameters in males suspected with infertility. Methods: 138 seminal samples were analyzed. The evaluation was performed using seminal analysis according to the criteria of OMS 2010. Results: the patients age was understood to be between 20 to 57 years, with a median age of 32,8± 6,7. The 61,6% of patients were normozoospermics, 9,4 % were azoospermic and 0,7% as-permic, 28,3% had one or more altered parameters (4,3% showed alteration in volume, 5,1% altered in spermatic concentration, 6,5% alter in mobility, 0,7% altered in morphology and 0,7% change in vitality, the 11% was shown to have more than one alterations). It was observed that there was a significant amount of difference between normozoospermics samples and with change: in volume (p=0,02), in spermatic concentration, total number of sperm, total sperm motile (TEM), sperm motility, vitality and normal morphology with a value of (p=0,00). Conclusions: The results of this study show that at an older age, there is an increase in the seminal alteration. The parameters of the volume, spermatic concentration, vitality, progressive motility and normal morphology, show a high percentage of abnormality, being the most affected parameter progressive motility.

No CAG repeat expansion of polymerase gamma is associated with male infertility in Tamil Nadu, South India.

Mitochondria contains a single deoxyribonucleic acid (DNA) polymerase, polymerase gamma (POLG) mapped to long arm of chromosome 15 (15q25), responsible for replication and repair of mitochondrial DNA. Exon 1 of the human POLG contains CAG trinucleotide repeat, which codes for polyglutamate. Ten copies of CAG repeat were found to be uniformly high (0.88) in different ethnic groups and considered as the common allele, whereas the mutant alleles (not -10/not -10 CAG repeats) were found to be associated with oligospermia/oligoasthenospermia in male infertility. Recent data suggested the implication of POLG CAG repeat expansion in infertility, but are debated. The aim of our study was to explore whether the not -10/not -10 variant is associated with spermatogenic failure. As few study on Indian population have been conducted so far to support this view, we investigated the distribution of the POLG CAG repeats in 61 infertile men and 60 normozoospermic control Indian men of Tamil Nadu, from the same ethnic background. This analysis interestingly revealed that the homozygous wild type genotype (10/- 10) was common in infertile men (77% - 47/61) and in normozoospermic control men (71.7% - 43/60). Our study failed to confirm any influence of the POLG gene polymorphism on the efficiency of the spermatogenesis.

No CAG repeat expansion of polymerase gamma is associated with male infertility in Tamil Nadu, South India.

Mitochondria contains a single deoxyribonucleic acid (DNA) polymerase, polymerase gamma (POLG) mapped to long arm of chromosome 15 (15q25), responsible for replication and repair of mitochondrial DNA. Exon 1 of the human POLG contains CAG trinucleotide repeat, which codes for polyglutamate. Ten copies of CAG repeat were found to be uniformly high (0.88) in different ethnic groups and considered as the common allele, whereas the mutant alleles (not -10/not -10 CAG repeats) were found to be associated with oligospermia/oligoasthenospermia in male infertility. Recent data suggested the implication of POLG CAG repeat expansion in infertility, but are debated. The aim of our study was to explore whether the not -10/not -10 variant is associated with spermatogenic failure. As few study on Indian population have been conducted so far to support this view, we investigated the distribution of the POLG CAG repeats in 61 infertile men and 60 normozoospermic control Indian men of Tamil Nadu, from the same ethnic background. This analysis interestingly revealed that the homozygous wild type genotype (10/- 10) was common in infertile men (77% - 47/61) and in normozoospermic control men (71.7% - 43/60). Our study failed to confirm any influence of the POLG gene polymorphism on the efficiency of the spermatogenesis.

A386G transition in DAZL gene is not associated with spermatogenic failure in Tamil Nadu, South India.

The DAZ-like (DAZL) gene located on the short arm of autosomal chromosome 3 (3p24), an essential master gene for the premeiotic development of male and female germ cells, is the father of the Y-chromosome DAZ gene cluster and encodes for RNA-binding proteins. Reported instances of positive association of DAZL gene mutations with infertility in men have been found in a Taiwanese population but not in Caucasians. There is no study from Tamil Nadu, South India, to demonstrate the role of DAZL gene in male infertility; we, therefore, analyzed a total of 287 men, including 147 infertile and 140 normozoospermic fertile controls from rural areas of Tamil Nadu, South India, to assess the phenotypic effect of DAZL mutations in this region of the world. Interestingly, all our samples showed absence of the A386G (T54A) mutation that was found to be associated with spermatogenic failure in the Taiwanese population. Therefore, we suggest that the A386G (T54A) mutation is not associated with male infertility in Tamil Nadu, South India.