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Systems Biology in Reproductive Medicine

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https://www.readbyqxmd.com/read/29299971/the-role-of-the-fas-fasl-signaling-pathway-in-environmental-toxicant-induced-testicular-cell-apoptosis-an-update
#1
Mei Wang, Ping Su
The Fas/FasL signaling pathway is one of the major pathways that regulate apoptosis. Increasing studies have shown that the activation of the Fas/FasL signaling pathway is closely associated with testicular cell apoptosis. However, the mechanism involved is still unclear. We discuss recent findings regarding the molecular mechanisms by which environmental toxicants induce testicular pathology via Fas/FasL signaling. These findings suggest that Fas/FasL signaling is employed to impact the sensitivity (a response to external factors) of germ cells, disrupt steroidogenic hormone and cytokine metabolism mediated by Sertoli cells, and elicit the activation of NFAT (nuclear factor of activated T-cells) in Leydig cell apoptosis...
January 4, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29297236/cleavage-stage-embryo-micromanipulation-in-the-clinical-setting
#2
Iman Halvaei, Shahin Ghazali, Stefania A Nottola, Mohammad Ali Khalili
Embryo micromanipulation was developed after introduction of microinjection to overcome infertility. Embryo micromanipulation may be performed at any embryo stage from pronuclear to blastocyst. The technique started out as basic and turned out to be increasingly more complex. Embryo micromanipulation at the cleavage-stage includes a wide range of techniques, from opening the zona pellucida in order to improve the chance of implantation, to removing detrimental components from the embryo to enhance embryo development or blastomeres for preimplantation genetic diagnosis and embryo splitting...
January 3, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29293026/does-genome-organization-matter-in-spermatozoa-a-refined-hypothesis-to-awaken-the-silent-vessel
#3
Dimitrios Ioannou, Helen G Tempest
The spermatozoon is considered by many to be a silent vessel whose only function is to safely deliver the paternal genome to the maternal oocyte. As a result, the paternal contribution to fertilization and embryogenesis is frequently overlooked. However, the spermatozoon is a highly elaborate and specialized cell that is formed through the process of spermatogenesis. Spermatogenesis is a complex cellular program of differentiation that produces mature spermatozoa, which are essential for reproduction, fertilization, and normal embryonic development...
January 2, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29287490/bayesian-analysis-improves-pulse-secretion-characterization-in-reproductive-hormones
#4
Huayu Liu, Alex J Polotsky, Gary K Grunwald, Nichole E Carlson
Pulsatile secretion of hormones in the hypothalamic-pituitary-gonadal axis is critical for normal functioning of the reproductive system. Thus, appropriate characterization of pulsatile secretion is important for identifying the (patho)physiology of reproductive conditions. Existing analysis methods often fail to adequately characterize pulsatility, especially when the signal-to-noise ratio is low. Newer Bayesian analysis methods for pulsatile hormones may offer improved secretion quantification in noisier data...
December 29, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29239675/the-first-decade-of-systems-biology-in-reproductive-medicine
#5
(no author information available yet)
No abstract text is available yet for this article.
December 14, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29227690/effect-of-the-induction-of-transgenerational-obesity-on-maternal-fetal-parameters
#6
Thaigra Sousa Soares, Ana Paula Andreolla, Carolina Abreu Miranda, Eduardo Klöppel, Luhara Silva Rodrigues, Rafaianne Queiroz Moraes-Souza, Débora Cristina Damasceno, Gustavo Tadeu Volpato, Kleber Eduardo Campos
Maternal obesity can cause complications for both women and their offspring for generations. Therefore, we intended to verify the repercussions of induction of transgenerational obesity on biochemical parameters, reproductive performance, and congenital anomaly frequency in Wistar rats. Female rats were used from successive generations. The female rats of parental generation (F0, n=10) were mated to obtain their offspring (F1 generation). F1 female rats received a monosodium glutamate (MSG) solution to induce obesity (n=07) or vehicle (control, n=06) during the neonatal period...
December 11, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29227165/sex-hormone-binding-globulin-an-important-biomarker-for-predicting-pcos-risk-a-systematic-review-and-meta-analysis
#7
Ritu Deswal, Arun Yadav, Amita Suneja Dang
Sex hormone-binding globulin (SHBG) is a glycoprotein which regulates bioavailability of sex steroid hormones. Interest in SHBG has escalated in recent years because of its inverse association with polycystic ovary syndrome (PCOS), obesity, insulin resistance, metabolic syndrome, and diabetes type II. This meta-analysis was performed to examine the associations of SHBG with PCOS and to correlate serum SHBG levels with various PCOS associated endocrine and metabolic dysregulation as well as to determine the effects of various therapeutic agents on serum SHBG levels in PCOS patients in order to assess the true accuracy of SHBG in the prediction of PCOS...
December 11, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29224376/regulation-of-follicle-growth-through-hormonal-factors-and-mechanical-cues-mediated-by-hippo-signaling-pathway
#8
Ikko Kawashima, Kazuhiro Kawamura
The ovary is an interesting organ that shows major structural changes within a short period of time during each reproductive cycle. Follicle development is controlled by local paracrine and systemic endocrine factors. Many hormonal and molecular analyses have been conducted to find the mechanisms underlying structural changes in ovaries, However, exact mechanisms still remain to be determined. Recent development of mechanobiology facilitates the understanding on the contribution of physical forces and changes in the mechanical properties of cells and tissues to physiology and pathophysiology...
December 9, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29199464/sperm-rna-elements-as-markers-of-health
#9
Rayanne B Burl, Stephanie Clough, Edward Sendler, Molly Estill, Stephen A Krawetz
Idiopathic infertility, an etiology not identified as part of standard clinical assessment, represents approximately 20% of all infertility cases. Current male infertility diagnosis focuses on the concentration, motility, and morphology of spermatozoa. This is of limited value when predicting birth success and of limited utility when selecting the optimum treatment. At fertilization, spermatozoa provide their genomic contribution, as well as a set of RNAs and proteins that have distinct roles in development...
December 3, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29193985/initial-germ-cell-to-somatic-cell-ratio-impacts-the-efficiency-of-ssc-expansion-in-vitro
#10
Itai Gat, Leila Maghen, Melissa Filice, Shlomit Kenigsberg, Brandon Wyse, Khaled Zohni, Peter Saraz, Andrée Gauthier Fisher, Clifford Librach
Spermatogonial Stem Cell (SSC) expansion in vitro remains a major challenge in efforts to preserve fertility among pubertal cancer survivor boys. The current study focused on innovative approaches to optimize SSC expansion. Six- to eight-week-old CD-1 murine testicular samples were harvested by mechanical and enzymatic digestion. Cell suspensions were incubated for differential plating (DP). After DP, we established two experiments comparing single vs. repetitive DP (S-DP and R-DP, respectively) until passage 2 (P2) completion...
December 1, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29190151/the-effect-of-repeated-light-dark-shifts-on-uterine-receptivity-and-early-gestation-in-mice-undergoing-embryo-transfer
#11
Cathy A Goldstein, Louise M O'Brien, Ingrid L Bergin, Thomas L Saunders
Female shift workers are at increased risk for negative reproductive outcomes, and animal evidence suggests that manipulation of the light-dark cycle is detrimental to early gestation in female mice. Specifically, failure of implantation may be responsible for these findings. The objective of this study was to better delineate which reproductive processes are vulnerable to detrimental effects of maternal circadian disturbance. We exposed mice undergoing embryo transfer to repetitive phase advances of the photoperiod...
November 30, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29172721/anogenital-distance-and-variability-in-semen-parameters
#12
José J López-Espín, Consuelo Pérez-Palazón, Ana B Maldonado-Cárceles, José D Román-Arias, Jaime Mendiola, Alberto M Torres-Cantero
The purpose of this study was to analyze whether the anogenital distance (AGD) was associated with variability in semen parameters. Semen parameters analyzed following the WHO guidelines and sperm DNA fragmentation were evaluated in 160 semen samples obtained over a period of a year from 16 healthy male volunteers. Two types of AGD measurements from the anus to the rear base of the scrotum (AGDAS) and to the cephalic insertion of the penis (AGDAP) were taken in each individual. The association between AGDs and semen parameters were studied using three statistical tools: a) general coefficient of variation (CV) and intra-individual coefficient of variation (CVi), b) general linear models for repeated measures, and c) mixed model fixed effects panel data...
November 27, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29157008/a-comparative-evaluation-of-migration-sedimentation-method-for-sperm-preparation
#13
Sevil Kiratli, Mehmet Yuncu, Kenan Kose, Sinan Ozkavukcu
The effectiveness of semen preparation using the migration-sedimentation (MS) method was evaluated, and compared to density gradient centrifuge and swim-up combination (DGC+SU). Sperm selection using MS is based on motility, thus, deleterious effects for which centrifugation has been blamed, are believed to be avoided. Normozoospermic male patients who had more than 10% forward progressive motile sperm in their ejaculate were included in the study. Spermatozoa selected by two different methods were investigated and compared according to sperm motility, concentration, morphology, vitality, DNA fragmentation, and presence of persistent histones...
November 20, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29156994/experimental-diabetes-impairs-maternal-reproductive-performance-in-pregnant-wistar-rats-and-their-offspring
#14
Leticia Bequer, Tahiry Gómez, José L Molina, Alain Álvarez, Claudia Chaviano, Sonia Clapés
The aim of this study was to determine the effect of mild hyperglycemia on metabolism during pregnancy, the maternal reproductive performance, and the characteristics of the offspring in neonatal mild diabetic-induced Wistar rats. The experimental diabetes model was generated by neonatal streptozotocin administration (100 mg of streptozotocin/Kg bw/sc) in female Wistar rats. At adulthood, the control and diabetic group were mated. At the 20th day of gestation, a maternal and fetal blood sample were collected for biochemical measurement...
November 20, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29099633/aging-deteriorates-quality-of-sperm-produced-by-male-mice-with-partial-yq-deletion
#15
Katarzyna Kotarska, Andrzej Doniec, Magdalena Bednarska, Zbigniew Polański, Józefa Styrna
The aim of the study was to assess the cumulative effects of aging and Y-chromosome long arm deletion on sperm quality parameters. Motility, mitochondrial activity, and head morphology were evaluated for sperm of 3- and 12-month-old males from B10.BR-Y(del) and B10.BR congenic mouse strains. The study revealed that quality and fertilizing potential of sperm produced by younger and older B10.BR males persist on similar levels, but worsen significantly with age of B10.BR-Y(del) males. The findings imply that partial Yq deletions might be more harmful for spermiogenesis in advancing age and may be applicable to other species including humans...
November 3, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29099629/regulatory-t-cells-improve-pregnancy-rate-in-rif-patients-after-additional-ivig-treatment
#16
Majid Ahmadi, Samaneh Abdolmohammadi-Vahid, Mahnaz Ghaebi, Leili Aghebati-Maleki, Sanam Dolati, Laya Farzadi, Aliyeh Ghasemzadeh, Kobra Hamdi, Vahid Younesi, Mohammad Nouri, Mehdi Yousefi
RIF (repeated implantation failure) women with immunologic basis and cellular abnormalities may benefit from intravenous immunoglobulins (IVIG) as an immunomodulator based on different studies. In this study, we evaluated the effect of IVIG on the frequency and function of Th17 and Treg cells, as two important subgroups of CD4(+) T cells in implantation and pregnancy rates. Seventy-two RIF patients with preconception Th1⁄Th2 ratio and natural killer (NK) cells frequency and activity elevation were selected and divided into two groups; 40 out of 72 received IVIG, aspirin, and heparin (anoxaparin) and constituted the treatment group and 32 patients received aspirin and heparin (anoxaparin) and no IVIG and were the control group...
November 3, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29087729/insulin-resistance-in-patients-with-recurrent-pregnancy-loss-is-associated-with-lymphocyte-population-aberration
#17
Yan Yan, Shihua Bao, Shile Sheng, Liuliu Wang, Weiyan Tu
This study was designed to investigate the relationship of insulin resistance (IR) and cellular immune abnormalities associated with women with recurrent pregnancy loss (RPL). Women with RPL were divided into two groups according to their homeostasis model assessment for IR (HOMA-IR) scores. The IR group received metformin approximately 3 months before pregnancy. The percentage of lymphocyte subsets and other blood biochemical indices were tested. The HOMA-IR and fasting serum insulin levels were related to the percentage of lymphocyte subsets...
October 31, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29083935/tri-nucleotide-consortium-of-androgen-receptor-is-associated-with-low-serum-fsh-and-testosterone-in-asthenospermic-men
#18
Haroon Latif Khan, Shahzad Bhatti, Sana Abbas, Yousaf Latif Khan, Muhammad Aslamkhan, Rosa Maria Marquez Gonzalez, Gerardo Rodriguez Gonzalez, Hikmet Hakan Aydin, Magali Segundo Trinidad
Androgen mediating signaling is implicated in regulating the expression of reproductive related genes. Any deviation in the gene expression might be the ignitable precursor for genomic instability that inflames the genomic rearrangements and a leading cause of cancer. The main goal of this study was to determine the relationships between trinucleotide repeats of androgen receptor (AR), sex steroids, and sexual function in men presenting with reduced sperm motility. We investigated the singleton or combinatorial effects of the length of trinucleotide repeats of AR on reproductive hormones, clinical parameters, semen analyses, as well as sexual assessment function of 210 asthenospermic outpatients along with 125 normal subjects...
October 30, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29182398/2017-systems-biology-in-reproductive-medicine-selected-highlights
#19
(no author information available yet)
No abstract text is available yet for this article.
December 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29020465/donor-sperm-insemination-after-failed-intra-couple-intracytoplasmic-sperm-injection
#20
Sylviane Hennebicq, Oxana Blagosklonov, Florence Eustache, Aline Papaxanthos, Veronique Drouineaud, Catherine Guillemain, Sophie Mirallie, Beatrice Delepine, Nathalie Rives, Isabelle Berthaut, Cynthia Frapsauce, Jean-François Guérin, Mehdi Benchaib
The purpose of the present multicenter study was to investigate whether an artificial insemination with donor sperm (AID) procedure after intra-couple intracytoplasmic sperm injection (ICSI) failure offers a significant chance of pregnancy and to identify prognostic factors for pregnancy after an AID procedure. An eleven-year retrospective multicenter study was conducted among 13 Centre d'Etude et de Conservation des Oeufs et du Sperme (CECOS) centers. A total of 319 couples having undergone an AID procedure after intra-conjugal ICSI failure were included in this study; a total of 1,159 AID and 1,011 intra-conjugal ICSI cycles were performed...
October 11, 2017: Systems Biology in Reproductive Medicine
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