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https://www.readbyqxmd.com/read/29029246/the-epidermal-growth-factor-network-role-in-oocyte-growth-maturation-and-developmental-competence
#1
Dulama Richani, Robert B Gilchrist
BACKGROUND: The LH surge induces great physiological changes within the preovulatory follicle, which culminate in the ovulation of a mature oocyte that is capable of supporting embryo and foetal development. However, unlike mural granulosa cells, the oocyte and its surrounding cumulus cells are not directly responsive to LH, indicating that the LH signal is mediated by secondary factors produced by the granulosa cells. The mechanisms by which the oocyte senses the ovulatory LH signal and hence prepares for ovulation has been a subject of considerable controversy for the past four decades...
September 20, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/29029123/outcome-of-elevated-ca125-values-from-primary-care-following-implementation-of-ovarian-cancer-guidelines
#2
S Michael Crawford, Colin Evans
Background: Ovarian cancer presents later in the UK compared to economically similar countries. National guidance suggests measuring CA125 in primary care as a means of bringing patients to specialist attention. Aim: To investigate the outcome of CA125 values measured in accordance with this policy. Setting and design: Examination of the laboratory records of female patients from the usual catchment population of one general hospital in whom CA125 was measured from primary care in a calendar year...
September 28, 2017: Family Practice
https://www.readbyqxmd.com/read/29029022/functional-characterization-of-microrna-27a-3p-expression-in-human-polycystic-ovary-syndrome
#3
Mingming Wang, Jing Sun, Bo Xu, Marcin Chrusciel, Jun Gao, Maciei Bazert, Joanna Stelmaszewska, Yunyun Xu, Hongwen Zhang, Leszek Pawelczyk, Fei Sun, Nafis Rahman, Slawomir Wolczynski, Suk Ying Tsang, Xiangdong Li
The goal of this study was to characterize the function of microRNA-27a-3p (miR-27a-3p) in polycystic ovary syndrome (PCOS). MiR-27a-3p expression was analyzed in excised granulosa cells (GCs) from 21 PCOS and 12 normal patients undergoing IVF cycle treatments, and in 17 non-treated cuneiform ovarian resection PCOS samples and 13 control ovarian samples-from non-PCOS patients. We found that the expression of miR-27a-3p was significantly increased in both excised GCs and the ovaries of PCOS patients compared to the controls...
September 29, 2017: Endocrinology
https://www.readbyqxmd.com/read/29028818/floral-structure-and-ontogeny-of-syndiclis-lauraceae
#4
Gang Zeng, Bing Liu, David K Ferguson, Jens G Rohwer, Yong Yang
Generic delimitation in the Beilschmiedia group of the Lauraceae remains ambiguous because flowering specimens of a few genera with confined distribution are poorly represented in herbaria, and a few floral characters important for taxonomy are still poorly known. Syndiclis is sporadically distributed in southwestern China, and is represented in the herbaria by only a few flowering specimens. We conducted field investigations to collect floral materials of four species and observed structures and ontogeny of the tiny flowers using both light microscopy (LM) and scanning electron microscopy (SEM)...
2017: PloS One
https://www.readbyqxmd.com/read/29027807/annals-express-biochemistry-of-the-menopause
#5
John W Honour
The life of a human female is characterised from teenage years by monthly menstruation which ceases (the menopause) typically between the age of 40 and 60 years. The potential for reproduction declines and ceases as the ovaries become depleted of follicles. A transition period in mid-life, for 2 to 10 years, when menstruation is less regular is called the peri-menopause. The menopause is associated with a significant decline in plasma concentrations of sex hormones, an increase in the concentrations of the gonadotrophins and changes in other hormones such as the inhibins...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/29027575/transmission-modes-of-a-pesticide-degrading-symbiont-of-the-oriental-fruit-fly-bactrocera-dorsalis-hendel
#6
Zijun Guo, Yongyue Lu, Fan Yang, Ling Zeng, Guangwen Liang, Yijuan Xu
Symbionts are associated with many insects and play several multifunctional roles in insect-microorganism mutualistic relationships. The trichlorphon-degrading symbiont Citrobacter freundii (CF-BD) of the oriental fruit fly Bactrocera dorsalis was recently discovered; however, its intraspecies transmission pathway among flies remains unknown. Here, we use fluorescence in situ hybridization (FISH), PCR detection, and a series of ingenious experiments to reveal that CF-BD was aggregated in rectal pads associated with the female ovipositor, and the CF-BD symbiont was vertically transmitted via egg surface contamination...
October 13, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29027088/redescription-of-philometra-filiformis-stossich-1896-nematoda-philometridae-a-gonad-infecting-parasite-of-the-common-pandora-pagellus-erythrinus-linnaeus-sparidae-in-the-mediterranean-sea-including-new-taxonomic-features-revealed-by-sem
#7
František Moravec, Nessrine Ghanmi, Amira Chaabane, Lamia Gargouri, Jean-Lou Justine
The insufficiently known nematode species Philometra filiformis (Stossich, 1896) (Philometridae) is redescribed based on light and scanning electron microscopical (SEM) examinations of specimens collected from the ovaries of the type-host, the common pandora Pagellus erythrinus (Linnaeus) (Perciformes, Sparidae), from off the Mediterranean coast of Tunisia. The male of this species was studied with SEM for the first time, which revealed some new, taxonomically important morphological features. The male posterior end has a caudal mound consisting of two lateral parts widely separated dorsally from each other, four pairs of small adanal papillae, a pair of large but moderately developed papillae located posterior to the cloacal aperture and a pair of small phasmids...
October 12, 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/29026839/missing-the-benefit-of-metformin-in-acute-myeloid-leukemia-a-problem-of-contrast
#8
Alice C Ceacareanu, George K Nimako, Zachary A P Wintrob
OBJECTIVE: To evaluate whether metformin's cancer-related benefits reported in patients with solid tumors (ST) are also present in acute myeloid leukemia (AML) patients. METHODS: Baseline demographic and clinical history for all diabetes mellitus patients newly diagnosed with AML or cancer of the breast, ovary, prostate, gastrointestinal tract, lung, or kidney at Roswell Park Cancer Institute in Buffalo, NY (January 2003-December 2010, n = 924) was collected. Overall survival (OS) and disease-free survival (DFS) were assessed by Kaplan-Meier (KM) analysis and Cox proportional hazards regression (hazard ratio [HR])...
July 2017: Journal of Research in Pharmacy Practice
https://www.readbyqxmd.com/read/29026721/expression-of-the-genes-for-peroxisome-proliferator-activated-receptor-%C3%AE-cyclooxygenase-2-and-proinflammatory-cytokines-in-granulosa-cells-from-women-with-polycystic-ovary-syndrome
#9
Joong Yeup Lee, Jin Cheol Tae, Chung Hyon Kim, Doyeong Hwang, Ki Chul Kim, Chang Suk Suh, Seok Hyun Kim
OBJECTIVE: To identify differences in the expression of the genes for peroxisome proliferator-activated receptor (PPAR)-γ, cyclooxygenase (COX)-2, and the proinflammatory cytokines interleukin (IL)-6 and tumor necrosis factor (TNF)-α in granulosa cells (GCs) from polycystic ovary syndrome (PCOS) patients and controls undergoing controlled ovarian stimulation. METHODS: Nine patients with PCOS and six controls were enrolled in this study. On the day of oocyte retrieval, GCs were collected from pooled follicular fluid...
September 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/29025092/heat-stress-induces-autophagy-in-pig-ovaries-during-follicular-development
#10
Benjamin J Hale, Candice L Hager, Jacob T Seibert, Joshua T Selsby, Lance H Baumgard, Aileen F Keating, Jason W Ross
Hyperthermia or heat stress (HS) occurs when heat dissipation mechanisms are overwhelmed by external and internal heat production. Hyperthermia negatively affects reproduction and potentially compromises oocyte integrity and reduces developmental competence of ensuing embryos. Autophagy is the process by which cells recycle energy through the reutilization of cellular components and is activated by a variety of stressors. Study objectives were to characterize autophagy-related proteins in the ovary following cyclical HS during the follicular phase...
August 28, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29025054/presence-of-polycystic-ovary-syndrome-is-associated-with-longer-anogenital-distance-in-adult-mediterranean-women
#11
María L Sánchez-Ferrer, Jaime Mendiola, Ana I Hernández-Peñalver, Shiana Corbalán-Biyang, Ana Carmona-Barnosi, María T Prieto-Sánchez, Aníbal Nieto, Alberto M Torres-Cantero
STUDY QUESTION: Is polycystic ovary syndrome (PCOS) associated with anogenital distance (AGD), a biomarker of fetal androgen exposure, in adult Mediterranean women? SUMMARY ANSWER: Longer AGD is associated with PCOS in adult Mediterranean women. WHAT IS KNOWN ALREADY: AGD is a biomarker of prenatal androgen milieu. Human observational studies have reported that associations between AGD and reproductive parameters in both sexes. Exposure of the female fetus to intrauterine androgens may be a risk factor for PCOS in adulthood...
August 30, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29024790/dna-methylation-and-potential-multigenerational-epigenetic-effects-linked-to-uranium-chronic-low-dose-exposure-in-gonads-of-males-and-females-rats
#12
REVIEW
G Elmhiri, C Gloaguen, S Grison, D Kereselidze, C Elie, K Tack, M Benderitter, P Lestaevel, A Legendre, M Souidi
INTRODUCTION: An increased health problem in industrialised countries is the contemporary concern of public and scientific community as well. This has been attributed in part to accumulated environmental pollutants especially radioactive substances and the use of nuclear power plants worldwide. However, the outcome of chronic exposure to low doses of a radionuclide such as uranium remains unknown. Recently, a paradigm shift in the perception of risk of radiotoxicology has emerged through investigating the possibility of transmission of biological effects over generations, in particular by epigenetic pathways...
October 9, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29024779/kinetic-characterization-of-bile-salt-transport-by-human-ntcp-slc10a1
#13
Márton Jani, Erzsébet Beéry, Teresa Heslop, Beáta Tóth, Bhavana Jagota, Emese Kis, B Kevin Park, Peter Krajcsi, Richard J Weaver
The transport of bile acids facilitated by NTCP is an important factor in establishing bile flow. In this study, we examine the kinetics associated with human NTCP-dependent transport of two quantitatively important bile acids comprising the human bile acid pool, chenodeoxycholic acid and glycine-chenodeoxycholate, and secondary bile salt, 3-sulfo-glycolithocholate of potential toxicological significance. The study employed human NTCP overexpressing Chinese Hamster Ovary cells and results compared with taurocholate, a prototypical bile salt commonly used in transporter studies...
October 9, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/29024702/polycystic-ovarian-syndrome-pcos-long-term-metabolic-consequences
#14
Panagiotis Anagnostis, Basil C Tarlatzis, Robert P Kauffman
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in women during their reproductive ages, associated with a plethora of cardiometabolic consequences, with obesity, insulin resistance and hyperandrogenemia playing a major role in the degree of such manifestations. These consequences include increased risk of glucose intolerance and diabetes mellitus (both type 2 and gestational), atherogenic dyslipidemia, systemic inflammation, non-alcoholic fatty liver disease, hypertension and coagulation disorders...
October 9, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29024578/morpho-functional-features-of-the-gonads-of-danio-rerio-the-role-of-brain-derived-neurotrophic-factor
#15
Pietro Cacialli, Livia D'Angelo, Paolo de Girolamo, Luigi Avallone, Carla Lucini, Elisabeth Pellegrini, Luciana Castaldo
Zebrafish, a suitable and widely used teleost fish model in basic biomedical research, displays morphophysiological features of adult gonads that share some commonalities with those of mammalian species. In mammals, gametogenesis is regulated, among several factors, by brain derived neurotrophic factor (BDNF). This neurotrophin has a well-established role in the developing and adult nervous system, as well as gonads development and functions in vertebrates pecies. We hypothesize that BDNF has a role also in the gonadal functions of zebrafish...
October 12, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29024517/germ-cell-migration-proliferation-and-differentiation-during-gonadal-morphogenesis-in-all-female-japanese-flounder-paralichthys-olivaceus
#16
Yang Yang, Qinghua Liu, Yongshuang Xiao, Xueying Wang, Hao An, Zongcheng Song, Feng You, Yanfeng Wang, Daoyuan Ma, Jun Li
In this study, all genetic female(XX)broods of Japanese flounder were produced artificially by mating the females with sex-reversed males. The proliferation and migration of primordial germ cells (PGCs), formation of ovary and oogenesis were described in detail. After hatching, around 20 individual PGCs migrated from the lateral to the dorsal of trunk region. At 15 days post hatching (dph), a part of PGCs were covered by a single layer somatic cells and formed the genital ridge. By 22 dph, the elongated gonadal primordia appeared under the ventral kidney, where the PGCs were totally enclosed by somatic cells...
October 10, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29023530/allele-specific-expression-at-the-androgen-receptor-alpha-gene-in-a-hybrid-unisexual-fish-the-amazon-molly-poecilia-formosa
#17
Fangjun Zhu, Ingo Schlupp, Ralph Tiedemann
The all-female Amazon molly (Poecilia formosa) is the result of a hybridization of the Atlantic molly (P. mexicana) and the sailfin molly (P. latipinna) approximately 120,000 years ago. As a gynogenetic species, P. formosa needs to copulate with heterospecific males including males from one of its bisexual ancestral species. However, the sperm only triggers embryogenesis of the diploid eggs. The genetic information of the sperm donor typically will not contribute to the next generation of P. formosa. Hence, P...
2017: PloS One
https://www.readbyqxmd.com/read/29023479/evaluating-the-efficiency-of-chef-and-cmv-promoter-with-ires-and-furin-2a-linker-sequences-for-monoclonal-antibody-expression-in-cho-cells
#18
Saeedeh Ebadat, Samira Ahmadi, Maryam Ahmadi, Fatemeh Nematpour, Farzaneh Barkhordari, Reza Mahdian, Fatemeh Davami, Fereidoun Mahboudi
In recent years, monoclonal antibodies (mAbs) have been developed as powerful therapeutic and diagnostic agents and Chinese hamster ovary (CHO) cells have emerged as the dominant host for the recombinant expression of these proteins. A critical step in recombinant expression is the utilization of strong promoters, such as the Chinese Hamster Elongation Factor-1α (CHEF-1) promoter. To compare the strengths of CHEF with cytomegalovirus (CMV) promoter for mAb expression in CHO cells, four bicistronic vectors bearing either internal ribosome entry site (IRES) or Furin/2A (F2A) sequences were designed...
2017: PloS One
https://www.readbyqxmd.com/read/29023142/diffusion-weighted-imaging-in-ectopic-pregnancy-ring-of-restriction-sign
#19
Afak Durur Karakaya, Mehmet Seker, İrmak Durur-Subaşı
OBJECTIVE: To demonstrate the diffusion weighted imaging (DWI) findings of ectopic pregnancy (EP) and introduce the "ring of restriction" sign by discussing possible causes. METHODS: Between January 2014 and January 2017, patients with EP and examined by magnetic resonance imaging (MRI) on a 3-T scanner were retrospectively evaluated. MRI and DWI findings were recorded. RESULTS: A total of 40 patients were diagnosed with EP at our university hospital, eight of whom (20%) were evaluated by MRI and DWI...
October 12, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29022494/colder-environments-are-associated-with-a-greater-cancer-incidence-in-the-female-population-of-the-united-states
#20
Ankit Sharma, Tanu Sharma, Mahaveer S Panwar, Devesh Sharma, Rashmi Bundel, Ryan T Hamilton, James A Radosevich, Chandi C Mandal
Cancer incidence and/or mortality among individuals varies with diet, socio-culture, ethnicity, race, gender, and age. Similarly, environmental temperature modulates many biological functions. To study the effect of environment temperature on cancer incidence, the US population was selected. Because, county-wise cancer incidence rate data of various anatomical site-specific cancers and different races/ethnicities for both males and females are available. Moreover, the differences amongst the aforementioned factors among individuals are much less, as compared to the world population...
October 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
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