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https://www.readbyqxmd.com/read/28646317/di-n-butyl-phthalate-prompts-interruption-of-spermatogenesis-steroidogenesis-and-fertility-associated-with-increased-testicular-oxidative-stress-in-adult-male-rats
#1
Giribabu Nelli, Sreenivasula Reddy Pamanji
Di-n-butyl phthalate (DBP) is extensively used as plasticizer, and it was ubiquitary released into the environment. The present study was aimed to investigate the effect of DBP on reproductive competence in adult male rats. Adult male rats were received corn oil or DBP injection intraperitoneally (ip) at 100 and 500 mg/kg body weight on 90, 97, 104, and 111 days. Following completion of the experimental period, adult male rats were cohabitated with untreated proestrus female rats for determination of fertilization capacity...
June 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28646316/identifying-major-events-in-two-sturgeons-life-using-pectoral-fin-spine-ring-structure-exploring-the-use-of-a-non-destructive-method
#2
Shima Bakhshalizadeh, Ali Bani, Shahram Abdolmalaki, Natalie Moltschaniwskyj
Maturation is one of the most important life history traits that influences on many ecological characteristics of animals. This study aimed to describe the indirect distinguish of first reproduction and habitat shift (transition from the pelagic to benthic environment), using the width of translucent and annuluses of the pectoral fin spine of two sturgeon species, Persian sturgeon, Acipenser persicus, and starry sturgeon, Acipenser stellatus. Interpretation of growth bands in pectoral fin sections was done objectively using direct reading of thin sections and image analysis...
June 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28646171/a-new-type-of-homodiploid-fish-derived-from-the-interspecific-hybridization-of-female-common-carp%C3%A2-%C3%A3-%C3%A2-male-blunt-snout-bream
#3
Shi Wang, Xiaolan Ye, Yude Wang, Yuting Chen, Bowen Lin, Zhenfeng Yi, Zhuangwen Mao, Fangzhou Hu, Rurong Zhao, Juan Wang, Rong Zhou, Li Ren, Zhanzhou Yao, Min Tao, Chun Zhang, Jun Xiao, Qinbo Qin, Shaojun Liu
It is commonly believed that hybridization might lead to the formation of new polyploidy species, but it is unclear whether hybridization can produce a new homodiploid species. Here, we report the spontaneous occurrence of a new crucian carp-like homodiploid fish (2n = 100) that originated from the interspecific hybridization of female common carp (Cyprinus carpio, Cyprininae, 2n = 100) × male blunt snout bream (Megalobrama amblycephala, Cultrinae, 2n = 48). The phenotype and reproductive traits of this new crucian carp-like homodiploid fish were found to be very similar to those of the existing diploid species (diploid crucian carp; Carassius auratus)...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646036/feeding-on-ripening-and-over-ripening-fruit-interactions-between-sugar-ethanol-and-polyphenol-contents-in-a-tropical-butterfly
#4
Michaël Beaulieu, Kristin Franke, Klaus Fischer
In ripe fruit, energy mostly derives from sugar, while in over-ripe fruit, it also comes from ethanol. Such ripeness differences may alter the fitness benefits associated with frugivory if animals are unable to degrade ethanol when consuming over-ripe fruit. In the tropical butterfly Bicyclus anynana, we found that females consuming isocaloric solutions mimicking ripe (20% sucrose) and over-ripe fruit (10% sucrose, 7% ethanol) of the palm Astrocaryum standleyanum exhibited higher fecundity than females consuming a solution mimicking unripe fruit (10% sucrose)...
June 23, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28645895/multiparity-improves-outcomes-after-cerebral-ischemia-in-female-mice-despite-features-of-increased-metabovascular-risk
#5
Rodney M Ritzel, Anita R Patel, Monica Spychala, Rajkumar Verma, Joshua Crapser, Edward C Koellhoffer, Anna Schrecengost, Evan R Jellison, Liang Zhu, Venugopal Reddy Venna, Louise D McCullough
Females show a varying degree of ischemic sensitivity throughout their lifespan, which is not fully explained by hormonal or genetic factors. Epidemiological data suggest that sex-specific life experiences such as pregnancy increase stroke risk. This work evaluated the role of parity on stroke outcome. Age-matched virgin (i.e., nulliparous) and multiparous mice were subjected to 60 min of reversible middle cerebral artery occlusion and evaluated for infarct volume, behavioral recovery, and inflammation. Using an established mating paradigm, fetal microchimeric cells present in maternal mice were also tracked after parturition and stroke...
June 23, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28645863/toxicology-of-octamethylcyclotetrasiloxane-d4
#6
Allison Franzen, Tracy Greene, Cynthia Van Landingham, Robinan Gentry
Octamethylcyclotetrasiloxane (D4) is a volatile cyclic siloxane used primarily as a monomer or intermediate in the production of some silicon-based polymers widely used in industrial and consumer applications and may be present as a residual impurity in a variety of consumer products. A robust toxicological data set exists for D4. Treatment-related results from a chronic inhalation study conducted in rats are limited to mild effects on the respiratory tract, increases in liver weight, increases in the incidence of uterine endometrial epithelial hyperplasia, and a dose-related trend in the incidence of endometrial adenomas...
June 20, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28645785/contraceptive-counseling-in-reproductive-aged-women-treated-for-breast-cancer-at-a-tertiary-care-institution-a-retrospective-analysis
#7
Sara L Johansen, Klaira Lerma, Kate A Shaw
OBJECTIVE: To assess the frequency of documented contraceptive and fertility preservation counseling for women treated for breast cancer. STUDY DESIGN: We conducted a chart analysis of female breast cancer patients (n=211) ages 18-45 receiving chemotherapy treatment at Stanford Comprehensive Cancer Center from 2010-2014. Primary outcomes of contraceptive counseling and fertility preservation counseling documentation were assessed for frequency. Secondary outcomes included pregnancy testing, contraception use, and pregnancy during treatment...
June 20, 2017: Contraception
https://www.readbyqxmd.com/read/28645693/male-mice-ultrasonic-vocalizations-enhance-female-sexual-approach-and-hypothalamic-kisspeptin-neuron-activity
#8
Akari Asaba, Takuya Osakada, Kazushige Touhara, Masahiro Kato, Kazutaka Mogi, Takefumi Kikusui
Vocal communication in animals is important for ensuring reproductive success. Male mice emit song-like "ultrasonic vocalizations (USVs)" when they encounter female mice, and females show approach to the USVs. However, it is unclear whether USVs of male mice trigger female behavioral and endocrine responses in reproduction. In this study, we first investigated the relationship between the number of deliveries in breeding pairs for 4months and USVs syllables emitted from those paired males during 3min of sexual encounter with unfamiliar female mice...
June 20, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28645691/maternal-exposure-to-a-mixture-of-persistent-organic-pollutants-pops-affects-testis-histology-epididymal-sperm-count-and-induces-sperm-dna-fragmentation-in-mice
#9
Abdolrahman Khezri, Birgitte Lindeman, Anette K Krogenæs, Hanne F Berntsen, Karin E Zimmer, Erik Ropstad
Persistent organic pollutants (POPs) are widespread throughout the environment and some are suspected to induce reproductive toxicity. As animals and humans are exposed to complex mixtures of POPs, it is reasonable to assess how such mixtures could interact with the reproductive system. Our aim is to investigate how maternal exposure to a mixture of 29 different persistent organic pollutants, formulated to mimic the relative POP levels in the food basket of the Scandinavian population, could alter reproductive endpoints...
June 20, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28645657/gross-pathology-physiological-and-toxicological-responses-in-relation-to-metals-and-persistent-organic-pollutants-pops-burden-in-tilapia-species-from-ogun-river-nigeria
#10
Oju R Ibor, Aina O Adeogun, Azubuike V Chukwuka, Augustine Arukwe
We have investigated gross pathology, physiological (steroid precursors) and toxicological responses (oxidative stress and phase II biotransformation) in relation to tissue contaminant burden in Tilapia species along the entire length (320 km) of Ogun River, Nigeria. The Ogun River is the longest and largest river in Southwestern Nigeria located along heavily industrialized cities and receives complex mixtures of effluents. A total of 1074 tilapias were collected from three sampling points (Abeokuta, Isheri and Ikorodu) and from an upstream control point (Igboho) and evaluated for gross pathological changes, hepatic transcript levels for oxidative stress and phase II biotransformation responses...
June 8, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28645254/comparing-self-and-provider-collected-swabbing-for-hpv-dna-testing-in-female-to-male-transgender-adult-patients-a-mixed-methods-biobehavioral-study-protocol
#11
Sari L Reisner, Madeline B Deutsch, Sarah M Peitzmeier, Jaclyn M White Hughto, Timothy Cavanaugh, Dana J Pardee, Sarah McLean, Elliot J Marrow, Matthew J Mimiaga, Lori Panther, Marcy Gelman, Jamison Green, Jennifer Potter
BACKGROUND: Cervical cancer, nearly all cases of which are caused by one of several high-risk strains of the human papillomavirus (hr-HPV), leads to significant morbidity and mortality in individuals with a cervix. Trans masculine (TM) individuals were born with female reproductive organs and identify as male, man, transgender man, or another diverse gender identity different from their female assigned sex at birth. Routine preventive sexual health screening of TM patients is recommended, including screening for cervical cancer and other sexually transmitted infections (STIs); however, as many as one in three TM patients are not up-to-date per recommended U...
June 23, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28644873/circular-rna-expression-profiling-of-human-granulosa-cells-during-maternal-aging-reveals-novel-transcripts-associated-with-assisted-reproductive-technology-outcomes
#12
Jing Cheng, Jia Huang, Suzhen Yuan, Su Zhou, Wei Yan, Wei Shen, Yun Chen, Xi Xia, Aiyue Luo, Da Zhu, Shixuan Wang
Circular RNAs (circRNAs) are a unique class of endogenous RNAs which could be used as potential diagnostic and prognostic biomarkers of many diseases. Our study aimed to investigate circRNA profiles in human granulosa cells (GCs) during maternal aging and to uncover age-related circRNA variations that potentially reflect decreased oocyte competence. CircRNAs in GCs from in vitro fertilization (IVF) patients with young age (YA, ≤ 30 years) and advanced age (AA, ≥ 38 years) were profiled by microarray, and validated in 20 paired samples...
2017: PloS One
https://www.readbyqxmd.com/read/28644857/beneficial-effects-of-hibiscus-rosa-sinensis-l-flower-aqueous-extract-in-pregnant-rats-with-diabetes
#13
Luana Alves Freitas Afiune, Thaís Leal-Silva, Yuri Karen Sinzato, Rafaianne Queiroz Moraes-Souza, Thaigra Sousa Soares, Kleber Eduardo Campos, Ricardo Toshio Fujiwara, Emilio Herrera, Débora Cristina Damasceno, Gustavo Tadeu Volpato
PURPOSE: The Hibiscus rosa-sinensis flower is widely used in Brazilian traditional medicine for the treatment of diabetes and has shown antifertility activity in female Wistar rats. However, there is no scientific confirmation of its effect on diabetes and pregnancy. The aim of this study was evaluate the effect of aqueous extract of H. rosa-sinensis flowers on maternal-fetal outcome in pregnant rats with diabetes. METHODS: Diabetes was induced by streptozotocin (STZ, 40 mg/kg) in virgin, adult, female Wistar rats...
2017: PloS One
https://www.readbyqxmd.com/read/28643786/a-unified-model-of-hymenopteran-preadaptations-that-trigger-the-evolutionary-transition-to-eusociality
#14
Andrés E Quiñones, Ido Pen
Explaining the origin of eusociality, with strict division of labour between workers and reproductives, remains one of evolutionary biology's greatest challenges. Specific combinations of genetic, behavioural and demographic traits in Hymenoptera are thought to explain their relatively high frequency of eusociality, but quantitative models integrating such preadaptations are lacking. Here we use mathematical models to show that the joint evolution of helping behaviour and maternal sex ratio adjustment can synergistically trigger both a behavioural change from solitary to eusocial breeding, and a demographic change from a life cycle with two reproductive broods to a life cycle in which an unmated cohort of female workers precedes a final generation of dispersing reproductives...
June 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28642689/integrating-neural-circuits-controlling-female-sexual-behavior
#15
REVIEW
Paul E Micevych, Robert L Meisel
The hypothalamus is most often associated with innate behaviors such as is hunger, thirst and sex. While the expression of these behaviors important for survival of the individual or the species is nested within the hypothalamus, the desire (i.e., motivation) for them is centered within the mesolimbic reward circuitry. In this review, we will use female sexual behavior as a model to examine the interaction of these circuits. We will examine the evidence for a hypothalamic circuit that regulates consummatory aspects of reproductive behavior, i...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28642015/convergent-and-unidirectional-evolution-of-extremely-long-aedeagi-in-the-largest-feather-mite-genus-proctophyllodes-acari-proctophyllodidae-evidence-from-comparative-molecular-and-morphological-phylogenetics
#16
Pavel B Klimov, Sergey V Mironov, Barry M OConnor
Proctophyllodid feather mites (400+ species) are permanent (full-time) symbionts commonly occurring on passerine birds. Phenotypic evolution of these mites appears to be greatly influenced by characters related to reproduction (>87.5% of a total of 32 taxonomically important discrete characters) and male genitalic characters (21.9%). Because sexual selection could the major evolutionary driver in this system, we test the theoretical expectation that genitalic or sexually dimorphic characters should evolve more rapidly and divergently then other characters...
June 19, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28641119/maternal-progesterone-levels-are-modulated-by-maternal-bmi-and-predict-birth-weight-sex-specifically-in-human-pregnancies
#17
Anke Diemert, Janina Goletzke, Claus Barkmann, Robert Jung, Kurt Hecher, Petra Arck
OBJECTIVE: Successful pregnancy outcome is the result of a tailored adaptation of the maternal endocrine and immune system throughout gestation. We aimed to investigate if maternal endocrine, anthropometric and life style factors assessed longitudinally throughout pregnancy allow prediction of birth weight. STUDY DESIGN: Data on maternal factors and obstetrical characteristics from 220 pregnancies from a German prospective pregnancy cohort were analyzed using univariate and multivariate regression models...
June 3, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28641050/thrifty-females-frisky-males-winter-energetics-of-hibernating-bats-from-a-cold-climate
#18
Zenon J Czenze, Kristin A Jonasson, Craig K R Willis
Mammalian hibernation consists of energy-saving torpor bouts (periods of controlled reduction in body temperature [Tb]) interspersed with brief arousals to normothermic Tb. Frequency and duration of torpor bouts and arousals can affect winter survival and are thought to be influenced by an optimization balancing the energetic benefits of prolonged torpor against the physiological and ecological costs (e.g., accumulation of metabolic wastes). Female little brown bats (Myotis lucifugus) spend their fat reserves more slowly than males during winter, presumably so they can emerge from hibernation in good condition to initiate pregnancy...
July 2017: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/28641026/sociodemographic-factors-associated-with-female-genital-cutting-among-women-of-reproductive-age-in-nigeria
#19
T O Ojo, M Y Ijadunola
OBJECTIVES: The aims of the study were to determine the prevalence of female genital cutting (FGC) among women of reproductive age in Nigeria and identify the sociodemographic factors associated with the practice. METHODS: A secondary analysis of the 2013 Nigeria Demographic and Health Survey was carried out in 38,948 women of reproductive age (15-49 years). RESULTS: The prevalence of FGC among respondents was almost 25%, most of whom (82%) had undergone the procedure when they were under 5 years of age...
June 22, 2017: European Journal of Contraception & Reproductive Health Care
https://www.readbyqxmd.com/read/28640878/genetic-loci-associated-with-coronary-artery-disease-harbor-evidence-of-selection-and-antagonistic-pleiotropy
#20
Sean G Byars, Qin Qin Huang, Lesley-Ann Gray, Andrew Bakshi, Samuli Ripatti, Gad Abraham, Stephen C Stearns, Michael Inouye
Traditional genome-wide scans for positive selection have mainly uncovered selective sweeps associated with monogenic traits. While selection on quantitative traits is much more common, very few signals have been detected because of their polygenic nature. We searched for positive selection signals underlying coronary artery disease (CAD) in worldwide populations, using novel approaches to quantify relationships between polygenic selection signals and CAD genetic risk. We identified new candidate adaptive loci that appear to have been directly modified by disease pressures given their significant associations with CAD genetic risk...
June 2017: PLoS Genetics
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