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https://www.readbyqxmd.com/read/28545113/rac1-is-dispensable-for-oocyte-maturation-and-female-fertility-in-vivo
#1
Jian-Xiu Hao, Tie-Gang Meng, Li-Hua Fan, Yuan-Qing Yao
Oocyte maturation, the important process to produce female haploid gamete, accompanies with polarity establishment and highly asymmetric cell division to emit minor polar body within little cytoplasm. Microfilaments play central roles in polarity establishment and asymmetric cell division. Several actin regulators like WASP protein family as well as small GTPases function in microfilament dynamics, involving the process. Rac1, one member of RhoGTPases, has been reported to regulate the polarity and asymmetric cell division in mouse oocytes in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28544750/unexpected-ethical-dilemmas-in-sex-assignment-in-46-xy-dsd-due-to-5-alpha-reductase-type-2-deficiency
#2
Heather M Byers, Lauren H Mohnach, Patricia Y Fechner, Ming Chen, Inas H Thomas, Linda A Ramsdell, Margarett Shnorhavorian, Elizabeth A McCauley, Anne-Marie E Amies Oelschlager, John M Park, David E Sandberg, Margaret P Adam, Catherine E Keegan
Sex assignment at birth remains one of the most clinically challenging and controversial topics in 46,XY disorders of sexual development (DSD). This is particularly challenging in deficiency of 5-alpha reductase type 2 given that external genitalia are typically undervirilized at birth but typically virilize at puberty to a variable degree. Historically, most individuals with 5-alpha reductase deficiency were raised females. However, reports that over half of patients who underwent a virilizing puberty adopted an adult male gender identity have challenged this practice...
May 25, 2017: American Journal of Medical Genetics. Part C, Seminars in Medical Genetics
https://www.readbyqxmd.com/read/28544226/short-term-rapamycin-treatment-increases-ovarian-lifespan-in%C3%A2-young-and-middle-aged-female-mice
#3
Xiaowei Dou, Yan Sun, Jiazhao Li, Jing Zhang, Dandan Hao, Wenwen Liu, Rui Wu, Feifei Kong, Xiaoxu Peng, Jing Li
Although age-related ovarian failure in female mammals cannot be reversed, recent strategies have focused on improving reproductive capacity with age, and rapamycin is one such intervention that has shown a potential for preserving the ovarian follicle pool and preventing premature ovarian failure. However, the application is limited because of its detrimental effects on follicular development and ovulation during long-term treatment. Herein, we shortened the rapamycin administration to 2 weeks and applied the protocol to both young (8 weeks) and middle-aged (8 months) mouse models...
May 22, 2017: Aging Cell
https://www.readbyqxmd.com/read/28542265/ovarian-features-in-white-tailed-deer-odocoileus-virginianus-fawns-and-does
#4
G D A Gastal, A Hamilton, B G Alves, S G S de Tarso, J M Feugang, W J Banz, G A Apgar, C K Nielsen, E L Gastal
The knowledge about ovarian reserve is essential to determine the reproductive potential and to improve the methods of fertility control for overpopulated species, such as white-tailed deer (Odocoileus virginianus). The goal of this study was to evaluate the effect of age on the female reproductive tract of white-tailed deer, focusing on ovarian features. Genital tracts from 8 prepubertal and 10 pubertal females were used to characterize the preantral follicle population and density, morphology, distribution of follicular classes; stromal cell density; and apoptosis in the ovary...
2017: PloS One
https://www.readbyqxmd.com/read/28541603/comparison-of-first-line-chemotherapy-including-escalated-beacopp-versus-chemotherapy-including-abvd-for-people-with-early-unfavourable-or-advanced-stage-hodgkin-lymphoma
#5
REVIEW
Nicole Skoetz, Andrea Will, Ina Monsef, Corinne Brillant, Andreas Engert, Bastian von Tresckow
BACKGROUND: There are two different international standards for the treatment of early unfavourable and advanced stage Hodgkin lymphoma (HL): chemotherapy with escalated BEACOPP (bleomycin/etoposide/doxorubicin/cyclophosphamide/vincristine/procarbazine/prednisone) regimen and chemotherapy with ABVD (doxorubicin/bleomycin/vinblastine/dacarbazine) regimen. OBJECTIVES: To determine the advantages and disadvantages of chemotherapy including escalated BEACOPP compared to chemotherapy including ABVD in the treatment of early unfavourable or advanced stage HL as first-line treatment...
May 25, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28541460/seminal-plasma-pro-inflammatory-cytokines-interferon-%C3%AE-ifng-and-c-x-c-motif-chemokine-ligand-8-cxcl8-fluctuate-over-time-within-men
#6
David J Sharkey, Kelton P Tremellen, Nancy E Briggs, Gustaaf A Dekker, Sarah A Robertson
STUDY QUESTION: Do seminal plasma pro-inflammatory cytokines interferon-γ (IFNG) and C-X-C motif chemokine ligand 8 (CXCL8) vary within individual men over time? SUMMARY ANSWER: IFNG exhibits substantial variation that is independent of duration of abstinence but correlates with lipopolysaccharide (LPS) content, while CXCL8 varies moderately in association with duration of abstinence. WHAT IS KNOWN ALREADY: Pro-inflammatory cytokines IFNG and CXCL8 in seminal fluid can adversely impact male and female fertility...
May 25, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28538689/reticulate-evolution-of-the-rock-lizards-meiotic-chromosome-dynamics-and-spermatogenesis-in-diploid-and-triploid-males-of-the-genus-darevskia
#7
Victor Spangenberg, Marine Arakelyan, Eduard Galoyan, Sergey Matveevsky, Ruzanna Petrosyan, Yuri Bogdanov, Felix Danielyan, Oxana Kolomiets
Knowing whether triploid hybrids resulting from natural hybridization of parthenogenetic and bisexual species are fertile is crucial for understanding the mechanisms of reticulate evolution in rock lizards. Here, using males of the bisexual diploid rock lizard species Darevskia raddei nairensis and Darevskia valentini and a triploid hybrid male Darevskia unisexualis × Darevskia valentini, we performed karyotyping and comparative immunocytochemistry of chromosome synapsis and investigated the distribution of RAD51 and MLH1 foci in spread spermatocyte nuclei in meiotic prophase I...
May 24, 2017: Genes
https://www.readbyqxmd.com/read/28538003/use-of-fertility-medications-and-cancer-risk-a-review-and-update
#8
Lindsay Kroener, Daniel Dumesic, Zain Al-Safi
PURPOSE OF REVIEW: There is increasing use of fertility medications for ovulation induction and ovarian stimulation for in-vitro fertilization in the treatment of female infertility. In this review, recent literature regarding the association between fertility medication and cancer risk is reviewed. RECENT FINDINGS: Several important publications have recently addressed the relationship between use of fertility medications and cancer risk. There are methodological limitations to many of these studies, including unique challenges in studying rare cancers that often develop several years after the time of fertility medication exposure...
May 22, 2017: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28537815/anticancer-treatments-and-female-fertility-clinical-concerns-and-role-of-oncologists-in-oncofertility-practice
#9
Mahmoud Salama, Teresa K Woodruff
Anticancer treatments such as aggressive chemotherapy and radiotherapy have deleterious gonadotoxic side effects and are considered the most common causes of pathological and iatrogenic fertility loss in women. Areas Covered: In order to preserve fertility of young women and girls with cancer, several established, experimental, and debatable options can be offered in the emerging field of oncofertility. This article reviews the effects of anticancer treatments on female fertility and discusses the current challenges and future directions of fertility preservation options that can be offered to the female patients with cancer...
May 24, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28536242/mutation-in-tdrd9-causes-non-obstructive-azoospermia-in-infertile-men
#10
Maram Arafat, Iris Har-Vardi, Avi Harlev, Eliahu Levitas, Atif Zeadna, Maram Abofoul-Azab, Victor Dyomin, Val C Sheffield, Eitan Lunenfeld, Mahmoud Huleihel, Ruti Parvari
BACKGROUND: Azoospermia is diagnosed when sperm cells are completely absent in the ejaculate even after centrifugation. It is identified in approximately 1% of all men and in 10%-20% of infertile males. Non-obstructive azoospermia (NOA) is characterised by the absence of sperm due to either a Sertoli cell-only pattern, maturation arrest, hypospermatogenesis or mixed patterns. NOA is a severe form of male infertility, with limited treatment options and low fertility success rates. In the majority of patients, the cause for NOA is not known and mutations in only a few genes were shown to be causative...
May 23, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28534015/oncologic-and-obstetric-outcomes-of-conservative-surgery-for-borderline-ovarian-tumors-in-women-of-reproductive-age
#11
Se Yun Lee, Min Chul Choi, Bo Ram Kwon, Sang Geun Jung, Hyun Park, Won Duk Joo, Chan Lee, Je Ho Lee, Joon Mo Lee
OBJECTIVE: To compare the oncologic and obstetric outcomes in reproductive-age females with borderline ovarian tumors (BOTs) treated with cyst enucleation (CE) or unilateral salpingo-oophorectomy (USO). METHODS: The medical records of patients with BOTs treated between 1998 and 2014 were retrospectively reviewed. The recurrence rates in the USO and CE groups were compared, and the postoperative obstetric outcomes were assessed via telephone survey. RESULTS: Eighty-nine patients with BOTs underwent USO, and 19 underwent CE...
May 2017: Obstetrics & Gynecology Science
https://www.readbyqxmd.com/read/28533904/-this-is-where-it-all-started-the-pivotal-role-of-plc%C3%AE-within-the-sophisticated-process-of-mammalian-reproduction-a-systemic-review
#12
Itai Gat, Raoul Orvieto
Mammalian reproduction is one of the most complex and fascinating biological phenomenon, which aims to transfer maternal and paternal genetic material to the next generation. At the end of oogenesis and spermatogenesis, both haploid gametes contain a single set of chromosomes ready to form the zygote, the first cell of the newly developing individual. The mature oocyte and spermatozoa remain in a quiescent state, during which the oocyte is characterized by nuclear and cytoplasmic arrest, while the spermatozoa necessitates further maturation within the epididymis and female reproductive track prior to egg fertilization...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/28531319/improved-sperm-kinematics-in-semen-samples-collected-after-2-h-versus-4-7-days-of-ejaculation-abstinence
#13
H Alipour, G Van Der Horst, O B Christiansen, F Dardmeh, N Jørgensen, H I Nielsen, C Hnida
STUDY QUESTION: Does a short abstinence period of only 2 h yield spermatozoa with better motility characteristics than samples collected after 4-7 days? SUMMARY ANSWER: Despite lower semen volume, sperm concentration, total sperm counts and total motile counts, higher percentages of motile spermatozoa with higher velocity and progressiveness were detected in samples obtained after 2 h. WHAT IS KNOWN ALREADY: Most studies that have assessed the effect of abstinence periods on sperm motility parameters in men with a sperm concentration below 15 million/ml have detected a higher percentage of motile spermatozoa in samples obtained after short abstinence periods...
May 22, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28529156/transgenerational-effects-of-maternal-and-grandmaternal-age-on-offspring-viability-and-performance-in-drosophila-melanogaster
#14
Margaret C Bloch Qazi, Paige B Miller, Penny M Poeschel, Mai H Phan, Joseph L Thayer, Christian L Medrano
In non-social insects, fitness is determined by relative lifetime fertility. Fertility generally declines with age as a part of senescence. For females, senescence has profound effects on fitness by decreasing viability and fertility as well as those of her offspring. However, important aspects of these maternal effects, including the cause(s) of reduced offspring performance and carry-over effects of maternal age, are poorly understood. Drosophila melanogaster is a useful system for examining potential transgenerational effects of increasing maternal age, because of their use as a model system for studying the physiology and genetic architecture of both reproduction and senescence...
May 18, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28527572/roles-of-retinoic-acid-in-germ-cell-differentiation
#15
Marius Teletin, Nadège Vernet, Norbert B Ghyselinck, Manuel Mark
The modalities of gametogenesis differ markedly between sexes. Female are born with a definitive reserve of oocytes whose size is crucial to ensure fertility. Male fertility, in contrast, relies on a tightly regulated balance between germ cell self-renewal and differentiation, which operates throughout life, according to recurring spatial and temporal patterns. Genetic and pharmacological studies conducted in the mouse and discussed in this review have revealed that all-trans retinoic acid and its nuclear receptors are major players of gametogenesis and are instrumental to fertility in both sexes...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28526997/nafld-as-a-sexual-dimorphic-disease-role-of-gender-and-reproductive-status-in-the-development-and-progression-of-nonalcoholic-fatty-liver-disease-and-inherent-cardiovascular-risk
#16
REVIEW
Stefano Ballestri, Fabio Nascimbeni, Enrica Baldelli, Alessandra Marrazzo, Dante Romagnoli, Amedeo Lonardo
Nonalcoholic fatty liver disease (NAFLD) spans steatosis through nonalcoholic steatohepatis, cirrhosis, and hepatocellular carcinoma (HCC) associated with striking systemic features and excess cardiovascular and liver-related mortality. The pathogenesis of NAFLD is complex and multifactorial. Endocrine derangements are closely linked with dysmetabolic traits. For example, in animal and human studies, female sex is protected from dysmetabolism thanks to young individuals' ability to partition fatty acids towards ketone body production rather than very low density lipoprotein (VLDL)-triacylglycerol, and to sex-specific browning of white adipose tissue...
May 19, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28524047/oestrogen-and-progesterone-receptor-in-melanoma-and-nevi-an-immunohistochemical-study
#17
Emi Dika, Pier Alessandro Fanti, Sabina Vaccari, Elisa Capizzi, Alessio Degiovanni, Agnese Gobbi, Bianca Maria Piraccini, Simone Ribero, Carlotta Baraldi, Giulia Maria Ravaioli, Michelangelo Fiorentino, Annalisa Patrizi
The effect of hormonal stimulation and fertility treatments, as well as their role in the development of malignant melanoma (MM), is still to be determined. The aim of this study was to investigate the presence of oestrogen receptor alpha (ERα) and progesterone receptor (PR) in MM and nevi after hormonal stimulation. Immunohistochemical analyses were performed utilizing antibodies specifically directed against ERα and PR in MM and atypical nevi specimens from patients: (1) diagnosed during pregnancy, (2) diagnosed in the six months following delivery, or (3) who had undergone repetitive cycles of hormonal stimulation for in vitro fertilization in the year that preceded MM diagnosis...
May 19, 2017: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/28523198/uterine-fibroid-torsion-during-pregnancy-a-case-of-laparotomic-myomectomy-at-18-weeks-gestation-with-systematic-review-of-the-literature
#18
Annachiara Basso, Mariana Rita Catalano, Giuseppe Loverro, Serena Nocera, Edoardo Di Naro, Matteo Loverro, Mariateresa Natrella, Salvatore Andrea Mastrolia
Uterine myomas are the most common benign growths affecting female reproductive system, occurring in 20-40% of women, whereas the incidence rate in pregnancy is estimated from 0.1 to 3.9%. The lower incidence in pregnancy is due to the association with infertility and low pregnancy rates and implantation rates after in vitro fertilization treatment. Uterine myomas, usually, are asymptomatic during pregnancy. However, occasionally, pedunculated fibroids torsion or other superimposed complications may cause acute abdominal pain...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28521685/weighing-the-impact-of-diet-and-lifestyle-on-female-reproductive-function
#19
Gabriella Garruti, Raffaella De Palo, Maria De Angelisc
In the last years several scientific societies and expert groups focused on the role played by nutritional factors, lifestyle and excess of body fat in interfering with female reproduction and fertility. In many studies a confounding factor is represented by polycystic ovary syndrome (PCOS) which is one of the major causes of infertility where genetic and family factors are certainly playing a role, together with lifestyle and nutritional factors. In an attempt to define "the optimal fertility diet", we will consider the role played by Mediterranean lifestyle and some macronutrients (animal and vegetable proteins) on ovulatory disorders and female fertility also considering some new visions derived from randomized trials of Lifestyle programs in obese Infertile women asking for in vitro fertilization or alternative assisted reproduction technologies...
May 17, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28521061/extracellular-camp-activates-molecular-signalling-pathways-associated-with-sperm-capacitation-in-bovines
#20
Carlos Agustín I Alonso, Claudia E Osycka-Salut, Luciana Castellano, Andreína Cesari, Nicolás Di Siervi, Adrián Mutto, Anders Johannisson, Jane M Morrell, Carlos Davio, Silvina Perez-Martinez
STUDY QUESTION: Is extracellular cAMP involved in the regulation of signalling pathways in bovine sperm capacitation? SUMMARY ANSWER: Extracellular cAMP-induced sperm capacitation through the activation of different signalling pathways that involve phospholipase C (PLC), PKC/ERK1-2 signalling and an increase in sperm Ca2+ levels, as well as soluble AC and cAMP/protein kinase A (PKA) signalling. WHAT IS KNOWN ALREADY: In order to fertilize the oocyte, ejaculated spermatozoa must undergo a series of changes in the female reproductive tract, known as capacitation...
May 18, 2017: Molecular Human Reproduction
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