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https://www.readbyqxmd.com/read/29053754/coming-of-age-do-female-harbour-porpoises-phocoena-phocoena-from-the-north-sea-and-baltic-sea-have-sufficient-time-to-reproduce-in-a-human-influenced-environment
#1
Tina Kesselring, Sacha Viquerat, Ralph Brehm, Ursula Siebert
The harbour porpoise is the only cetacean species native to German waters. Since human pressures are suggested to shorten their reproductive lifespan, basic knowledge on reproduction is strongly required. One parameter is the onset of sexual maturity in female harbour porpoises. Therefore, we investigated the first signs of sexual maturity for a period of almost two decades (1990-2016). Ovaries from 111 female harbour porpoises from the German North Sea and Baltic Sea were examined for the presence and morphological structure of follicles, corpora lutea and corpora albicantia...
2017: PloS One
https://www.readbyqxmd.com/read/29051587/dna-methylation-and-hydroxymethylation-analyses-of-the-active-line-1-subfamilies-in-mice
#2
Yui Murata, Miki Bundo, Junko Ueda, Mie Kubota-Sakashita, Kiyoto Kasai, Tadafumi Kato, Kazuya Iwamoto
Retrotransposon long interspersed nuclear element-1 (LINE-1) occupies a large proportion of the mammalian genome, comprising approximately 100,000 genomic copies in mice. Epigenetic status of the 5' untranslated region (5'-UTR) of LINE-1 is critical for its promoter activity. DNA methylation levels in the 5'-UTR of human active LINE-1 subfamily can be measured by well-established methods, such as a pyrosequencing-based assay. However, because of the considerable sequence and structural diversity in LINE-1 among species, methods for such assays should be adapted for the species of interest...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29048660/canonical-and-non-canonical-wnt-signaling-in-cancer-stem-cells-and-their-niches-cellular-heterogeneity-omics-reprogramming-targeted-therapy-and-tumor-plasticity-review
#3
Masaru Katoh
Cancer stem cells (CSCs), which have the potential for self-renewal, differentiation and de-differentiation, undergo epigenetic, epithelial-mesenchymal, immunological and metabolic reprogramming to adapt to the tumor microenvironment and survive host defense or therapeutic insults. Intra-tumor heterogeneity and cancer-cell plasticity give rise to therapeutic resistance and recurrence through clonal replacement and reactivation of dormant CSCs, respectively. WNT signaling cascades cross-talk with the FGF, Notch, Hedgehog and TGFβ/BMP signaling cascades and regulate expression of functional CSC markers, such as CD44, CD133 (PROM1), EPCAM and LGR5 (GPR49)...
September 19, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/29047397/tyrosine-kinase-4-is-involved-in-the-reproduction-of-the-platyhelminth-parasite-schistosoma-japonicum
#4
Han Ding, Fengchun Liu, Lulu Zhu, Fei Wu, Quan Liu, Siyu He, Wei Shao, Yinan Du, Cuiping Ren, Jijia Shen, Miao Liu
BACKGROUND: Schistosomiasis is one of the most common parasitic diseases affecting millions of humans and animals worldwide. Understanding the signal transduction pathways and the molecular basis of reproductive regulation in schistosomes is critically important for developing new strategies for preventing and treating these infections. Syk kinases regulate the proliferation, differentiation, morphogenesis, and survival of various types of cells and have been identified in invertebrates...
October 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29047224/ral-signaling-pathway-in-health-and-cancer
#5
REVIEW
Adel Rezaei Moghadam, Elham Patrad, Elham Tafsiri, Warner Peng, Benjamin Fangman, Timothy J Pluard, Anthony Accurso, Michael Salacz, Kushal Shah, Brandon Ricke, Danse Bi, Kyle Kimura, Leland Graves, Marzieh Khajoie Najad, Roya Dolatkhah, Zohreh Sanaat, Mina Yazdi, Naeimeh Tavakolinia, Mohammad Mazani, Mojtaba Amani, Saeid Ghavami, Robyn Gartell, Colleen Reilly, Zaid Naima, Tuba Esfandyari, Faris Farassati
The Ral (Ras-Like) signaling pathway plays an important role in the biology of cells. A plethora of effects is regulated by this signaling pathway and its prooncogenic effectors. Our team has demonstrated the overactivation of the RalA signaling pathway in a number of human malignancies including cancers of the liver, ovary, lung, brain, and malignant peripheral nerve sheath tumors. Additionally, we have shown that the activation of RalA in cancer stem cells is higher in comparison with differentiated cancer cells...
October 18, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/29044428/expression-of-stra8-is-conserved-in-therian-mammals-but-expression-of-cyp26b1-differs-between-marsupials-and-mice
#6
Danielle E Hickford, Siew Fen Lisa Wong, Stephen R Frankenberg, Geoff Shaw, Hongshi Yu, Keng Yih Chew, Marilyn B Renfree
The first sign of mammalian germ cell sexual differentiation is the initiation of meiosis in females and of mitotic arrest in males. In the mouse, retinoic acid induces ovarian Stra8 expression and entry of germ cells into meiosis. In developing mouse testes, cytochrome P450 family 26, subfamily b, polypeptide 1 (CYP26B1) produced by the Sertoli cells degrades retinoic acid, preventing Stimulated by Retinoic Acid Gene 8 (Stra8), expression and inhibiting meiosis. However, in developing humans, there is no evidence that CYP26B1 acts a meiosis-inhibiting factor...
August 1, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29044421/heterogeneous-hcg-and-hmg-commercial-preparations-result-in-different-intracellular-signalling-but-induce-a-similar-long-term-progesterone-response-in-vitro
#7
Laura Riccetti, Danièle Klett, Mohammed Akli Ayoub, Thomas Boulo, Elisa Pignatti, Simonetta Tagliavini, Manuela Varani, Tommaso Trenti, Alessia Nicoli, Francesco Capodanno, Giovanni Battista La Sala, Eric Reiter, Manuela Simoni, Livio Casarini
STUDY QUESTION: Are four urinary hCG/menotropin (hMG) and one recombinant preparation characterized by different molecular features and do they mediate specific intracellular signaling and steroidogenesis? SUMMARY ANSWER: hCG and hMG preparations have heterogeneous compositions and mediate preparation-specific cell signaling and early steroidogenesis, although similar progesterone plateau levels are achieved in 24 h-treated human primary granulosa cells in vitro...
October 1, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29037553/association-of-mir-146a-rs2910164-and-mir-222-rs2858060-polymorphisms-with-the-risk-of-polycystic-ovary-syndrome-in-iranian-women-a-case-control-study
#8
Amir Hossein Hosseini, Leila Kohan, Azita Aledavood, Sara Rostami
OBJECTIVE: Today, many single nucleotide polymorphisms in microRNA genes are known to alter the microRNA expression levels or processing causing susceptibility of several human diseases. The present study aimed to investigate the association of microRNA-146a (rs2910164) and microRNA-222 (rs2858060) polymorphisms with susceptibility to polycystic ovary syndrome (PCOS) in an Iranian population. MATERIALS AND METHODS: This case-control study was performed on 205 patients with PCOS and 205 normal women as the control group...
October 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29037192/retroperitoneal-ectopic-pregnancy-a-case-report-and-review-of-the-literature
#9
Man Yang, Lamu Cidan, Dan Zhang
BACKGROUND: Retroperitoneal ectopic pregnancy (REP) is an extremely rare type of ectopic pregnancy, with a total of less than 20 cases reported in the English literature. However, failure to recognize REP may result in severe consequences. CASE PRESENTATION: We report a case of 32-year-old woman with REP. She had amenorrhea, left lower abdominal pain, but no vaginal bleeding. Her urine human chorionic gonadotropin (HCG) test was positive and blood HCG level was 1880 m-international units per milliliter (mIU/mL)...
October 16, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29031687/structure-function-relationships-for-the-selective-inhibition-of-human-3%C3%AE-hydroxysteroid-dehydrogenase-type-1-by-a-novel-androgen-analog
#10
Jenny H Pham, Catherine M Will, Vance L Mack, Matthew Halbert, Edward Alexander Conner, Kevin M Bucholtz, James L Thomas
3β-hydroxysteroid dehydrogenase type 1 (3β-HSD1) is selectively expressed in human placenta, mammary glands and breast tumors in women. Human 3β-HSD2 is selectively expressed in adrenal glands and ovaries. Based on AutoDock 3 and 4 results, we have exploited key differences in the amino acid sequences of 3β-HSD1 (Ser194, Arg195) and 3β-HSD2 (Gly194, Pro195) by designing a selective inhibitor of 3β-HSD1. 2,16-Dicyano-4,5-epoxy-androstane-3,17-dione (16-cyano-17-keto-trilostane or DiCN-AND) was synthesized in a 4-step procedure from androstenedione...
October 11, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29030491/autophagy-is-activated-in-the-ovarian-tissue-of-polycystic-ovary-syndrome
#11
Da Li, Yue You, Fang-Fang Bi, Tie-Ning Zhang, Jiao Jiao, Tian-Ren Wang, Yi-Ming Zhou, Zi-Qi Shen, Xiu-Xia Wang, Qing Yang
The importance of autophagy in polycystic ovary syndrome (PCOS)-related metabolic disorders is increasingly being recognized, but few studies have investigated the role of autophagy in PCOS. Here, transmission electron microscopy demonstrated that autophagy was enhanced in the ovarian tissue from both humans and rats with PCOS. Consistent with this, ovarian granulosa cells from PCOS rats showed increases in the autophagy marker protein light chain 3B (LC3B), whereas levels of the autophagy substrate SQSTM1/p62 were decreased...
October 13, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29029022/functional-characterization-of-microrna-27a-3p-expression-in-human-polycystic-ovary-syndrome
#12
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/29027807/annals-express-biochemistry-of-the-menopause
#13
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/29025054/presence-of-polycystic-ovary-syndrome-is-associated-with-longer-anogenital-distance-in-adult-mediterranean-women
#14
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/29024779/kinetic-characterization-of-bile-salt-transport-by-human-ntcp-slc10a1
#15
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/29023530/allele-specific-expression-at-the-androgen-receptor-alpha-gene-in-a-hybrid-unisexual-fish-the-amazon-molly-poecilia-formosa
#16
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/29022118/serological-and-molecular-investigation-of-2117-like-vesiviruses-in-cats
#17
Barbara Di Martino, Federica Di Profio, Irene Melegari, Vittorio Sarchese, Ivano Massirio, Alessia Luciani, Gianvito Lanave, Fulvio Marsilio, Vito Martella
Vesivirus 2117 was first discovered as a contaminant in Chinese hamster ovary (CHO) cell cultures used for human drug production. Similar vesiviruses (VeVs) have been detected recently in dogs. In order to address the hypothesis that cats may also be exposed to 2117-like VeVs, in this study, we screened 236 feline sera using an enzyme-linked immunosorbent assay (ELISA) based on a recombinant VP1 protein from the canine VeV Bari/212/07/ITA. IgG antibodies against the 2117-like VeV were detected in 37.3% of the sera tested...
October 11, 2017: Archives of Virology
https://www.readbyqxmd.com/read/29020515/manufacturing-history-of-etanercept-enbrel-%C3%A0-consistency-of-product-quality-through-major-process-revisions
#18
Brian Hassett, Ena Singh, Ehab Mahgoub, Julie O'Brien, Steven M Vicik, Brian Fitzpatrick
Etanercept (ETN) (Enbrel®) is a soluble protein that binds to, and specifically inhibits, tumor necrosis factor (TNF), a proinflammatory cytokine. ETN is synthesized in Chinese hamster ovary cells by recombinant DNA technology as a fusion protein, with a fully human TNFRII ectodomain linked to the Fc portion of human IgG1. Successful manufacture of biologics, such as ETN, requires sophisticated process and product understanding, as well as meticulous control of operations to maintain product consistency. The objective of this evaluation was to show that the product profile of ETN drug substance (DS) has been consistent over the course of production...
October 11, 2017: MAbs
https://www.readbyqxmd.com/read/28993982/comparative-assessment-on-the-expression-level-of-recombinant-human-follicle-stimulating-hormone-fsh-in-serum-containing-versus-protein-free-culture-media
#19
Seyedeh Hoda Jazayeri, Amir Amiri-Yekta, Hamid Gourabi, Baharak Abd Emami, Zahra Halfinezhad, Somayeh Abolghasemi, Nayeralsadat Fatemi, Abbas Daneshipour, Mohammad Hossein Ghahremani, Mohammad Hossein Sanati, Mohammad Reza Khorramizadeh
Production of recombinant pharmaceutical proteins has made a great contribution to modern biotechnology. At present, quick advances in protein expression lead to the enhancement of product quantity and quality as well as reduction in timescale processing. In the current study, we assessed the expression level of recombinant human follicle-stimulating hormone (rhFSH) in adherent and suspension Chinese hamster ovary (CHO) cell lines by cultivation in serum-containing and chemically defined, protein-free media...
October 9, 2017: Molecular Biotechnology
https://www.readbyqxmd.com/read/28993961/predictive-factors-for-live-birth-after-in-vitro-maturation-of-oocytes-in-women-with-polycystic-ovary-syndrome
#20
Samer Tannus, Safak Hatirnaz, Justin Tan, Baris Ata, Seang-Lin Tan, Ebru Hatirnaz, Mine Kenat-Pektas, Michael-Haim Dahan
OBJECTIVE: In vitro maturation (IVM) of human oocytes can be an alternative treatment option to conventional in vitro fertilization. Women with polycystic ovary syndrome (PCOS) are considered the classical candidates for IVM because of the associated ovarian morphology and because IVM diminishes the risk of developing ovarian hyperstimulation syndrome. The objective of this study was to identify predictive factors for live birth in a cohort of women with PCOS who underwent IVM. METHODS: This retrospective study included 159 patients with PCOS who had IVM cycles in which single or double embryo transfer was performed...
October 9, 2017: Archives of Gynecology and Obstetrics
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