0000000000675501
AUTHOR
N. Garrido
Profound Transcriptomic Differences Found between Sperm Samples from Sperm Donors vs. Patients Undergoing Assisted Reproduction Techniques Tends to Disappear after Swim-up Sperm Preparation Technique
Background Although spermatozoa delivers its RNA to oocytes at fertilization, its biological role is not well characterized. Our purpose was to identify the genes differentially and exclusively expressed in sperm samples both before and after the swim-up process in control donors and infertile males with the purpose to identify their functional significance in male fertility. Materials and methods This was a nested case-control study. Ten sperm samples were obtained from infertile patients [n=5 (two aliquots each from five samples; one before the swim-up process and one after)] and donors [n=5 (two aliquots from five samples, one before the swim-up process and one after)]. Oligonucleotide m…
Evaluation of a possible association between estradiol and progesterone levels and ectopic pregnancy in low risk women undergoing IVF/ICSI
Introduction: Several independent risk factors of Ectopic Pregnancy (EP) have been described to date. Nevertheless, estradiol and progesterone have not been related to ectopic pregnancy, although there is biological rationale to think about them as possible candidates. Our aim was to correlate the incidence of EP with levels of estradiol (E2) and progesterone (P4), measured on two days (hCG day, and seven days later (hCG+7)), including the differences and ratios of these concentrations, between the two time-points. Material and methods: Retrospective cohort study of 578 patients undergoing fresh embryo transfer after IVF (100 cycles), ICSI (508 cycles) and IVF/ICSI (64 cycles) without risk …
Concentration of glutathione and expression of glutathione peroxidases 1 and 4 in fresh sperm provide a forecast of the outcome of cryopreservation of human spermatozoa
Oxidative stress imbalance potentially leads to damage of the structure of the cell and macromolecules such as plasma membrane components, proteins, and DNA. The plasma membrane of the sperm cell, which has high levels of polyunsaturated fatty acids, renders it particularly sensitive to free radical–mediated attacks. The freezing and subsequent thawing of sperm is a physically stressful process carried out during routine procedures in assisted reproduction techniques, which results in a highly variable and unpredictable reduction in the number of motile sperm cells. Subsequently, oxidative status can positively or negatively affect the motility, viability, and fertilizing capacity of thawed…