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https://www.readbyqxmd.com/read/28434104/mullerian-dysgenesis-a-critical-review-of-the-literature
#1
REVIEW
Souzana Choussein, Dimitrios Nasioudis, Dimitrios Schizas, Konstantinos P Economopoulos
PURPOSE: To present an update of the genetic, clinical, diagnostic, and therapeutic aspects of Mayer-Rokitansky-Kuster-Hauser (MRKH) syndrome. METHODS: Studies were considered eligible if they have evaluated patients with MRKH syndrome. Eligible articles were identified by a search of MEDLINE bibliographical database from 1950 to August 2016. A purely descriptive approach was adopted concerning all outcomes examined by the individual studies. RESULTS: MRKH syndrome is defined as congenital aplasia of the upper vagina and impairment of uterine development in normal 46XX females...
April 22, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28433658/molecular-cloning-of-esr2-and-gene-expression-analysis-of-esr1-and-esr2-in-the-pituitary-gland-of-the-chinese-alligator-alligator-sinensis-during-female-reproductive-cycle
#2
Ruidong Zhang, Yanan Yin, Long Sun, Peng Yan, Yongkang Zhou, Rong Wu, Xiaobing Wu
Estrogens play critical roles in reproductive physiology via estrogen receptors (ESRs) in vertebrates, including reptiles. Chinese alligator (Alligator sinensis) is an endemic and endangered reptile species in China. In the present study, we cloned ESR2 gene from the ovary using rapid amplification of cDNA ends (RACE), investigated the spatial expression of ESRs in various tissues and temporal expression of ESRs in the pituitary glands during the reproductive cycle in Chinese alligators by quantitative real-time PCR (qPCR)...
April 19, 2017: Gene
https://www.readbyqxmd.com/read/28432814/do-males-choose-their-mates-in-the-lekking-moth-achroia-grisella-influence-of-female-body-mass-and-male-reproductive-status-on-male-mate-choice
#3
Marlène Goubault, Rebecca Burlaud
Lekking males aggregate to attract females and contribute solely to egg fertilization, without any further parental care. Evolutionary theory therefore predicts them to be non-choosy towards their mates, because any lost mating opportunities would outweigh the benefits associated with such preferences. Nevertheless, due to time costs, the production of energetically costly sexual displays, and potential sperm limitation, the mating effort of lekking males is often considerable. These factors, combined with the fact that many females of varying quality are likely to visit leks, could favor the evolution of male mate preferences...
April 22, 2017: Insect Science
https://www.readbyqxmd.com/read/28432701/ovarian-follicle-development-and-genital-tract-characteristics-in-different-birthweight-gilts-at-150%C3%A2-days-of-age
#4
Frcl Almeida, Aln Alvarenga Dias, L P Moreira, Atl Fiúza, H Chiarini-Garcia
In the last decades, selection for improved prolificacy has resulted in higher litter sizes and has thereby increased the proportion of low birthweight (LW) piglets. It is well documented that LW piglets have lower growth performance, muscle accretion and poor carcass quality. However, little is known about the relations of birthweight with subsequent reproductive performance in gilts. This study investigated the effects of birthweight on reproductive tract and ovarian follicle development in 150-day-old gilts...
April 22, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28432496/reproductive-effects-of-life-cycle-exposure-to-difenoconazole-on-female-marine-medaka-oryzias-melastigma
#5
Xiaocui Dong, Zhenghong Zuo, Jiaojiao Guo, Hongbin Li, Lemeng Zhang, Meng Chen, Zhibin Yang, Chonggang Wang
Difenoconazole (DFZ) is a widely used triazole fungicide which has been detected in some estuaries and embayments. This study was conducted to investigate the effects of DFZ on ovarian development in female marine medaka (Oryzias melastigma). After 180 days exposure of the embryo to DFZ (0, 1, 10, 100 and 1000 ng/L), the gonadosomatic index and percentage of mature oocytes produced were significantly reduced in the 1, 10 and 100 ng/L treatments but not the 1000 ng/L treatment compared to the control, thus exhibiting a U-shaped dose response curve...
April 21, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28432470/male-behavioural-plasticity-depends-on-maternal-mating-status-in-the-two-spotted-spider-mite
#6
Keiko Oku, Tom P G van den Beuken
In haplodiploid organisms including the two-spotted spider mite, Tetranychus urticae (Acari: Tetranychidae), both unmated and mated females can produce male offspring. A previous study reported that males produced by unmated females (UM males) find pre-reproductive females more quickly than males produced by mated females (M males) in T. urticae. However, it remains unclear what factors cause the difference. We investigated effects of maternal mating status on mate-searching behaviour of their sons by changing the sons' developmental environment...
April 21, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28431828/clinical-use-of-monopronucleated-zygotes-following-blastocyst-culture-and-preimplantation-genetic-screening-including-verification-of-biparental-chromosome-inheritance
#7
Cara K Bradley, Maria Traversa, Natalie Hobson, Alison J Gee, Steven J McArthur
In assisted reproduction, embryos derived from monopronucleated (1PN) zygotes are considered abnormal and unsuitable for clinical use. Outcomes of 1PN-derived embryos designated for preimplantation genetic screening (PGS) were analysed. These embryos, especially from intracytoplasmic sperm injection (ICSI), were found to have a low developmental potential; 1PN and 2PN day 5 blastocyst development for IVF was 14.8% versus 36.4% (P < 0.0001), and for ICSI, 6.6% versus 34.0% (P < 0.0001), respectively. With the use of comparative genomic hybridization or next-generation sequencing, PGS was successfully carried out for 74 IVF and 32 ICSI 1PN-derived blastocysts, revealing adjusted abnormality rates of 39...
March 27, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/28431277/endocrine-disruption-by-environmental-gestagens-in-amphibians-a-short-review-supported-by-new-in%C3%A2-vitro-data-using-gonads-of-xenopus-laevis
#8
REVIEW
Andrea Ziková, Claudia Lorenz, Frauke Hoffmann, Wibke Kleiner, Ilka Lutz, Matthias Stöck, Werner Kloas
Endocrine disruption caused by various anthropogenic compounds is of persisting concern, especially for aquatic wildlife, because surface waters are the main sink of these so-called endocrine disruptors (ED). In the past, research focused on (anti)estrogenic, (anti)androgenic, and (anti)thyroidal substances, affecting primarily reproduction and development in vertebrates; however, other endocrine systems might be also targeted by ED. Environmental gestagens, including natural progestogens (e.g. progesterone (P4)) and synthetic progestins used for contraception, are supposed to affect vertebrate reproduction via progesterone receptors...
April 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28431246/fatty-acids-regulate-germline-sex-determination-through-acs-4-dependent-myristoylation
#9
Hongyun Tang, Min Han
Fat metabolism has been linked to fertility and reproductive adaptation in animals and humans, and environmental sex determination potentially plays a role in the process. To investigate the impact of fatty acids (FA) on sex determination and reproductive development, we examined and observed an impact of FA synthesis and mobilization by lipolysis in somatic tissues on oocyte fate in Caenorhabditis elegans. The subsequent genetic analysis identified ACS-4, an acyl-CoA synthetase and its FA-CoA product, as key germline factors that mediate the role of FA in promoting oocyte fate through protein myristoylation...
April 20, 2017: Cell
https://www.readbyqxmd.com/read/28429907/seasonal-vitamin-d-and-bone-metabolism-in-women-of-reproductive-age-in-urban-beijing
#10
Liying Yang, Wei Zhang
BACKGROUND AND OBJECTIVES: This study aimed to evaluate the relationship between serum 25-hydroxy-vitamin D and bone metabolism in healthy women of reproductive age. METHODS AND STUDY DESIGN: This study included 100 healthy female residents of Beijing (23-30 years old), who underwent bone ultrasonography as well as testing to evaluate serum25-hydroxy-vitamin D, parathyroid hormone, bone alkaline phosphatase, calcium, sodium, phosphorus, and alkaline phosphatase...
May 2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28429340/controlled-prospective-observational-study-on-the-efficiency-and-tolerability-of-a-combination-of-potential-nrf2-inducing-antioxidants-and-micronutrients-as-pre-treatment-for-icsi-in-dyspermic-patients-with-previous-failure
#11
R Rago, M Gallo, A Dal Lago, E Licata, G Paciotti, M Amodei, C Meneghini, C Fabiani, G Dani, C Liberanome, D Antonaci, R Corno, D Miriello, G Giuffrida, B Giammusso
OBJECTIVE: To evaluate the efficiency of pre-treatment in dyspermic males in IVF couples with a combination of micronutrients, for the purpose of improving the fertilization rate, the implantation rate and the outcome of the pregnancy. PATIENTS AND METHODS: This controlled prospective clinical study was performed in two medically assisted reproduction centers. 59 males with mild oligo-astheno-teratospermia (OAT) were admitted to the study. All of them had a history of previous in vitro fertilization (IVF) attempts with female partners aged < 40 diagnosed having tubal or idiopathic infertility...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28429210/prenatal-hyperhomocysteinemia-impairs-hypothalamic-regulation-of-reproductive-cycles-in-rat-progeny
#12
A V Arutyunyan, I V Zaloznyaya, G O Kerkeshko, Yu P Milyutina, A V Korenevskii
Effects of prenatal hyperhomocysteinemia on hypothalamic regulation of estrous cycles were studied in female rats. In mature rats exposed to prenatal hyperhomocysteinemia, changes in the catecholamine content in hypothalamic areas responsible for the formation of the preovulatory surge of gonadotropin-releasing hormone were revealed: the level of norepinephrine in the medial preoptic area decreased and concentration of dopamine in the median eminence with arcuate nuclei increased. Administration of melatonin attenuated the observed changes, which can be related to neuroprotective effects of this hormone determined by its antioxidant properties...
April 20, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28428871/does-wintering-north-or-south-of-the-sahara-correlate-with-timing-and-breeding-performance-in-black-tailed-godwits
#13
Rosemarie Kentie, Rocío Marquez-Ferrando, Jordi Figuerola, Laura Gangoso, Jos C E W Hooijmeijer, A H Jelle Loonstra, Frédéric Robin, Mathieu Sarasa, Nathan Senner, Haije Valkema, Mo A Verhoeven, Theunis Piersma
Migrating long distances requires time and energy, and may interact with an individual's performance during breeding. These seasonal interactions in migratory animals are best described in populations with disjunct nonbreeding distributions. The black-tailed godwit (Limosa limosa limosa), which breeds in agricultural grasslands in Western Europe, has such a disjunct nonbreeding distribution: The majority spend the nonbreeding season in West Africa, while a growing number winters north of the Sahara on the Iberian Peninsula...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28428854/not-all-weeds-are-created-equal-a-database-approach-uncovers-differences-in-the-sexual-system-of-native-and-introduced-weeds
#14
Megan L Van Etten, Jeffrey K Conner, Shu-Mei Chang, Regina S Baucom
Weedy species provide excellent opportunities to examine the process of successful colonization of novel environments. Despite the influence of the sexual system on a variety of processes from reproduction to genetic structure, how the sexual system of species influences weediness has received only limited consideration. We examined the hypothesis that weedy plants have an increased likelihood of being self-compatible compared with nonweedy plants; this hypothesis is derived from Baker's law, which states that species that can reproduce uniparentally are more likely to successfully establish in a new habitat where mates are lacking...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28428842/incipient-ecological-speciation-between-successional-varieties-of-a-dominant-tree-involves-intrinsic-postzygotic-isolating-barriers
#15
Elizabeth A Stacy, Bhama Paritosh, Melissa A Johnson, Donald K Price
Whereas disruptive selection imposed by heterogeneous environments can lead to the evolution of extrinsic isolating barriers between diverging populations, the evolution of intrinsic postzygotic barriers through divergent selection is less certain. Long-lived species such as trees may be especially slow to evolve intrinsic isolating barriers. We examined postpollination reproductive isolating barriers below the species boundary, in an ephemeral hybrid zone between two successional varieties of the landscape-dominant Hawaiian tree, Metrosideros polymorpha, on volcanically active Hawai'i Island...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28427900/molecular-cloning-and-characterization-of-kiss1-in-brandt-s-voles-lasiopodomys-brandtii
#16
Yan Chen, Lan Liu, Zhengguang Li, Dawei Wang, Ning Li, Ying Song, Cong Guo, Xiaohui Liu
Kisspeptin, encoded by kiss1, has been regarded as a major modulator of mammalian puberty and fertility due to its stimulation on GnRH. Brandt's vole is one of the main pest species on the Inner Mongolian steppes for its striking reproductive capacity and kiss1 is a key candidate gene related to reproductive regulatory cascades. In this study, kiss1 cDNA was cloned from the hypothalamus of Brandt's voles and kiss1 mRNA levels were investigated in different tissues, and at different developmental stages, using high-throughput real-time PCR...
April 18, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28427326/no-evidence-for-strong-cytonuclear-conflict-over-sex-allocation-in-a-simultaneously-hermaphroditic-flatworm
#17
Nikolas Vellnow, Dita B Vizoso, Gudrun Viktorin, Lukas Schärer
BACKGROUND: Cytoplasmic sex allocation distorters, which arise from cytonuclear conflict over the optimal investment into male versus female reproductive function, are some of the best-researched examples for genomic conflict. Among hermaphrodites, many such distorters have been found in plants, while, to our knowledge, none have been clearly documented in animals. METHODS: Here we provide a quantitative test for cytonuclear conflict over sex allocation in the simultaneously hermaphroditic flatworm Macrostomum lignano...
April 20, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28426980/hormonal-and-reproductive-risk-factors-of-papillary-thyroid-cancer-a-population-based-case-control-study-in-france
#18
Emilie Cordina-Duverger, Christophe Leux, Monica Neri, Catherine Tcheandjieu, Anne-Valérie Guizard, Claire Schvartz, Thérèse Truong, Pascal Guénel
The three times higher incidence of thyroid cancer in women compared to men points to a role of female sex hormones in its etiology. However the effects of these factors are poorly understood. We analyzed the association between thyroid cancer and hormonal and reproductive factors among women enrolled in CATHY, a population-based case-control study conducted in France. The study included 430 cases of papillary thyroid cancer and 505 controls frequency-matched on age and area of residence. The odds ratios for thyroid cancer increased with age at menarche (p trend 0...
April 17, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28426420/disruption-of-egg-production-by-triclabendazole-resistant-fasciola-hepatica-following-treatment-with-a-commercial-preparation-of-myrrh-mirazid
#19
Mohamed M O Abdelaal, Gerard P Brennan, Robert E B Hanna, Ahmed Abdel-Aziz, Ian Fairweather
An in vitro study has been carried out to monitor changes to the female reproductive system in adult triclabendazole (TCBZ)-resistant Fasciola hepatica following treatment with a commercial preparation of myrrh ("Mirazid"). Flukes were immersed for 6 h and 24 h in myrrh extract at a concentration of 200 µg/ml, then processed for histological and transmission electron microscope (TEM) examination of the uterus, Mehlis' gland, ovary and vitellaria. Egg production had become abnormal at 6 h post-treatment (pt), with the uterine lumen being filled with free vitelline cells and masses of shell protein material; few eggs were present...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28426261/a-morphological-study-of-uterine-alterations-in-mice-due-to-exposure-to-cadmium
#20
M Sapmaz-Metin, Y Topcu-Tarladacalisir, I Kurt-Omurlu, B Karaoz Weller, S Unsal-Atan
We investigated the morphologic and molecular effects of exposure to cadmium (Cd) for 30 and 60 days on the uteri of mice. We assessed uterine morphometric measurements, eosinophilia, mast cell numbers, endometrial apoptosis, proliferation and estrogen receptor alpha (ERα) immunoreactivity. We examined vaginal smears that reflected the hormonal alterations in the female reproductive tract. Because the female reproductive tract exhibits different morphology at each stage of the estrous cycle, we sacrificed all animals at estrus to make appropriate comparisons...
April 20, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
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