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https://www.readbyqxmd.com/read/29055154/gene-expression-changes-in-male-accessory-glands-during-ageing-are-accompanied-by-reproductive-decline-in-drosophila-melanogaster
#1
Mareike Koppik, Claudia Fricke
Senescence is accompanied by loss of reproductive functions. Here we studied reproductive ageing in Drosophila melanogaster males and asked whether the expected decline in male reproductive success is due to diminished functionality of the male accessory gland. The male accessory gland produces the majority of seminal fluid proteins (SFPs) transferred to the female at mating. SFPs induce female post-mating changes and are key to male reproductive success. We measured age-dependent gene expression changes for five representative SFP genes in males from four different age groups ranging from one to six weeks after eclosion...
October 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29055057/sperm-competition-but-not-major-histocompatibility-divergence-drive-differential-fertilization-success-between-alternative-reproductive-tactics-in-chinook-salmon
#2
S J Lehnert, L Helou, T E Pitcher, J W Heath, D D Heath
Post-copulatory sexual selection processes, including sperm competition and cryptic female choice (CFC), can operate based on major histocompatibility (MH) genes. We investigated sperm competition between male alternative reproductive tactics (jack (sneaker) and hooknose (guard)) of Chinook salmon (Oncorhynchus tshawytscha). Using a full factorial design, we examined in vitro competitive fertilization success of paired jack and hooknose males at three time points after sperm activation (0, 15 and 60 seconds) to test for male competition, CFC and time effects on male fertilization success...
October 20, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29054667/temperature-modulates-estrone-degradation-and-biological-effects-of-exposure-in-fathead-minnows
#3
M K Cox, K N Peterson, D Tan, P J Novak, H L Schoenfuss, J L Ward
Environmental pollutants, including estrogens, are widespread in aquatic environments frequently as a result of treated wastewater effluent discharged. Exposure to estrogens has been correlated with disruption of the normal physiological and reproductive function in aquatic organisms, which could impair the sustainability of exposed populations. However, assessing the effects of estrogen exposure on individuals is complicated by the fact that rates of chemical uptake and environmental degradation are temperature dependent...
October 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29054583/dietary-resveratrol-increases-mid-life-fecundity-of-female-nothobranchius-guentheri
#4
Youngjoo Lee, Andrew C Drake, Nicholas O Thomas, Lindsey G Ferguson, Patrick E Chappell, Kate Petersen Shay
The decline of female reproductive function is an early phenotype of aging in humans, occurring only midway through the lifespan. Yet the number of women delaying pregnancy continues to rise in industrialized societies due to personal or socioeconomic circumstances, often resulting in subfertility or difficulty conceiving. There are few defined mechanisms associated with this etiology, and equally few effective therapies. To combat this problem, we used a novel emerging model, Nothobranchius guentheri, that recapitulates the age-associated spectrum of changes that adversely affect human fertility...
October 17, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29054547/expression-profile-of-rhipicephalus-microplus-vitellogenin-receptor-during-oogenesis
#5
Adriana Seixas, María Fernanda Alzugaray, Lucas Tirloni, Luis Fernando Parizi, Antonio Frederico Michel Pinto, Naftaly Wang'ombe Githaka, Satoru Konnai, Kazuhiko Ohashi, John R Yates Iii, Carlos Termignoni, Itabajara da Silva Vaz
The vitellogenin receptor (VgR), which belongs to the low-density lipoprotein receptors (LDLR) family, regulates the absorption of yolk protein accumulated in developing oocytes during oogenesis. In the present study, the full sequence of Rhipicephalus microplus VgR (RmVgR) and the partial sequence of Rhipicephalus appendiculatus VgR (RaVgR) ORF were determined and cloned. The RmVgR amino acid sequence contains the five highly conserved structural motifs characteristic of LDLR superfamily members, the same overall structure as observed in other species...
October 16, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29054444/does-audience-affect-the-structure-of-warble-song-in-budgerigars-melopsittacus-undulatus
#6
Cole Tobin, Angela Medina-García, Gregory M Kohn, Timothy F Wright
In many bird species, male song functions both to defend a territory against other males and to attract a female mate. Male budgerigars (Melopsittacus undulatus) produce a song-like vocal signal, warble, that can be directed at either females or other males. Warble is a long, complex, low amplitude, and variable vocalization composed of different element types. While there is some evidence that warble can induce reproduction, the function of this signal is largely uncertain and it is unclear whether male- and female-directed warble differ in either function or structure...
October 17, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/29053991/molecular-mechanisms-of-development-of-the-human-fetal-female-reproductive-tract
#7
Gerald R Cunha, Takeshi Kurita, Mei Cao, Joel Shen, Stanley Robboy, Laurence Baskin
Human female reproductive tract development rests mostly upon hematoxilyn and eosin stained sections despite recent advances on molecular mechanisms in mouse studies. We report application of immunohistochemical methods to explore the ontogeny of epithelial and mesenchymal differentiation markers (keratins, homobox proteins, steroid receptors), transcription factors and signaling molecules (TP63 and RUNX1) during human female reproductive tract development. Keratins 6, 7, 8, 10, 14 and 19 (KRT6, KRT7, KRT8, KRT10, KRT14, KRT19) were expressed in a temporally and spatially dynamic fashion...
July 29, 2017: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/29053899/peptidergic-nerve-fibers-in-the-urethra-morphological-and-neurochemical-characteristics-in-female-mice-of-reproductive-age
#8
Christine M Barry, Esther Ji, Harman Sharma, Pauline Yap, Nicholas J Spencer, Dusan Matusica, Rainer V Haberberger
BACKGROUND: Peptidergic nerve fibers provide important contributions to urethral function. Urethral innervation of female mice is not well documented. AIMS: To determine the distribution and projection sites of nerve fibers immunoreactive for vasoactive intestinal peptide (VIP), calcitonin gene-related peptide (CGRP), substance P (SP), and neuropeptide Y (NPY) in the urethra of wild-type control mice and compare innervation characteristics between the proximal and distal urethra of young nullipara and older multipara mice...
October 20, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29053859/unexpected-results-when-assessing-underlying-aggressiveness-in-japanese-quail-using-photocastrated-stimulus-birds
#9
J M Caliva, J M Kembro, S Pellegrini, D A Guzman, R H Marin
Aggressive behaviors can affect both animal welfare and productivity. Because the expression of aggressive behaviors is dependent on the quality of the opponent, they reflect relative rather than absolute levels of underlying aggressiveness. This study was aimed to characterize the aggressive responsiveness of photostimulated (14:10 h light:dark photoperiod) adult Japanese quail when interacting with a photocastrated (6:18 h light:dark photoperiod) counterpart in a novel test environment and to assesses interindividual variations...
October 10, 2017: Poultry Science
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
#10
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/29052330/aquaporins-in-the-male-reproductive-tract-and-sperm-functional-implications-and-cryobiology
#11
REVIEW
M Yeste, R Morató, J E Rodríguez-Gil, S Bonet, N Prieto-Martínez
Aquaporins (AQPs) play a vital role for the transport of water and solutes across cell membranes. Classification of these ubiquitous proteins into three categories (orthodox AQPs, aquaglyceroporins and superaquaporins) is based on their sequence similarity and substrate selectivity. In the male reproductive tract of mammals, most AQPs (except AQP6 and AQP12) are found in different organs (including testis, efferent ducts and epididymis). AQP1 and AQP9 are the most abundant AQPs in the efferent ducts and epididymis and play a crucial role for the secretion/reabsorption dynamics of luminal fluid during sperm transport and maturation...
October 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29052315/identification-and-evolution-of-latrophilin-receptor-gene-involved-in-tribolium-castaneum-devolopment-and-female-fecundity
#12
Shanshan Gao, Xing Liu, Juanjuan Liu, Wenfeng Xiong, Xiaowen Song, Wu Wei, Luting Wei, Bin Li
Latrophilins (LPHs) are adhesion G-protein-coupled receptors comprising three paralogous forms (LPH-1, LPH-2 and LPH-3) and known receptors for α-latrotoxin, which are involved in growth, development, adaptability and schizophrenia and other diseases in vertebrates. However, the functions of LPH are poorly understood in most insects. Here, phylogenetic and synteny analysis indicated that LPH-1 and LPH-3 evolved separately from a common ancestor LPH-2. Then, latrophilin (Tclph) was cloned in Tribolium castaneum, and three alternatively spliced transcripts (Tclpha, Tclphb and Tclphc) were identified...
October 20, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/29052216/polycystic-ovarian-syndrome-prevalence-and-impact%C3%A2-on-the-wellbeing-of-australian-women-aged-16-29%C3%A2-years
#13
L Chitra Varanasi, Asvini Subasinghe, Yasmin L Jayasinghe, Emma T Callegari, Suzanne M Garland, Alexandra Gorelik, John D Wark
BACKGROUND: Polycystic ovarian syndrome (PCOS) is the most common condition among reproductive-aged women. However, its exact prevalence is unknown. AIMS: To determine the prevalence of PCOS in Australian women aged 16-29 years using the National Institutes of Health (NIH) criteria compared to self-reported PCOS, to compare co-morbidities between the groups and to determine the most distressing aspect of a diagnosis of PCOS for these young women. MATERIALS AND METHODS: Participants were recruited from the Young Female Health Initiative (YFHI) and Safe-D studies...
October 19, 2017: Australian & New Zealand Journal of Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29051304/consequences-of-advanced-aging-on-renal-function-in-chronic-hyperandrogenemic-female-rat-model-implications-for-aging-women-with-polycystic-ovary-syndrome
#14
Chetan N Patil, Lorraine C Racusen, Jane F Reckelhoff
Polycystic ovary syndrome (PCOS) is the most common endocrine and reproductive disorder in premenopausal women, characterized by hyperandrogenemia, metabolic syndrome, and inflammation. Women who had PCOS during their reproductive years remain hyperandrogenemic after menopause. The consequence of chronic hyperandrogenemia with advanced aging has not been studied to our knowledge. We have characterized a model of hyperandrogenemia in female rats and have aged them to 22-25 months to mimic advanced aging in hyperandrogenemic women, and tested the hypothesis that chronic exposure to hyperandrogenemia with aging has a deleterious effect on renal function...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29051074/pairing-ultrasonography-with-endocrinology-to-elucidate-underlying-mechanisms-of-successful-pregnancy-in-the-northern-fur-seal-callorhinus-ursinus
#15
Michelle R Shero, Don R Bergfelt, J Ward Testa, Gregg P Adams
Reproductive success is one of the central tenets of conservation management programs, yet the inability to study underlying physiological processes in a minimally-invasive manner and the unpredictable nature of wild animal populations leaves large gaps in our knowledge of factors critical to successful reproduction in wild species. This study integrated ultrasonography of the reproductive tract and analysis of reproductive hormones in 172 northern fur seals (Callorhinus ursinus) to identify intrinsic factors associated with reinitiating embryonic growth at the end of diapause...
October 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29050442/correlated-responses-to-long-term-divergent-selection-for-8-week-body-weight-in-female-white-plymouth-rock-chickens-sexual-maturity
#16
M Jambui, C F Honaker, P B Siegel
Reported here are correlated responses for reproductive traits to long-term divergent selection (54 generations) for 8-week body weight (BW8). Comparisons involved both selected and relaxed lines. Traits measured were age at first egg (AFE), body weight at first egg (WFE), and ratio of body weight and age at first egg (WAFE). Although sexual maturity was delayed in the selected lines, the effect was more pronounced in the low than high selected and relaxed lines. Selection for low BW resulted in decreases in WFE and WAFE...
September 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/29050416/feeding-broiler-breeders-a-reduced-balanced-protein-diet-during-the-rearing-and-laying-period-impairs-reproductive-performance-but-enhances-broiler-offspring-performance
#17
J Lesuisse, C Li, S Schallier, J Leblois, N Everaert, J Buyse
Mammalian studies have shown that nutritional constraints during the perinatal period are able to program the progeny (metabolism, performance). The presented research aimed to investigate if broiler breeders and their offspring performance could be influenced by reducing the dietary crude protein (CP) level with 25%. A total of 160 day-old pure line A breeder females were randomly divided over 2 dietary treatments. The control group was fed commercial diets, whereas the reduced balanced protein (RP) breeders received an isoenergetic diet that was decreased with 25% in dietary CP and amino acid during their entire lifespan...
September 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/29050014/a-real-life-analysis-of-reproductive-outcome-after-fertility-preservation-in-female-cancer-patients
#18
Sofie Hulsbosch, Martin Koskas, Carla Tomassetti, Petra De Sutter, Hans Wildiers, Patrick Neven, Thomas D'Hooghe, Frederic Amant
BACKGROUND: Fertility preservation before or during cancer treatment in young women has become an important health issue because of delayed motherhood and improved survival rates. This study evaluates the necessity and the efficacy of fertility preservation, with a focus on actual pregnancy wish and outcome after fertility preservation and cancer treatment. PATIENTS AND METHODS: All consecutive patients who received fertility preservation in 2 university referral centers before or during cancer treatment were included...
October 20, 2017: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/29049957/non-target-impacts-of-soybean-insecticidal-seed-treatments-on-the-life-history-and-behavior-of-podisus-nigrispinus-a-predator-of-fall-armyworm
#19
Pablo C Gontijo, Dyrson O Abbade Neto, Rodrigo L Oliveira, J P Michaud, Geraldo A Carvalho
The treatment of seeds with systemic insecticides has become a common practice worldwide. However, this prophylactic use of insecticides has been questioned recently because of the potential risks to non-target organisms. This study assessed the non-target effects of chlorantraniliprole and thiamethoxam seed treatments on the life history and walking behavior of Podisus nigrispinus (Dallas), as well as the efficacy of these insecticides for controlling Spodoptera frugiperda (Smith). Thiamethoxam caused mortality of P...
October 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29048721/the-immune-profile-induced-is-crucial-to-determine-the-effects-of-immunocastration-over-gonadal-function-fertility-and-gnrh-i-expression
#20
Daniela Siel, Alexandra Loaiza, Sonia Vidal, Mario Caruffo, Rodolfo Paredes, Galia Ramirez, Lisette Lapierre, Cristóbal Briceño, Oliver Pérez, Leonardo Sáenz
PROBLEM: Immunocastration or vaccination against the GnRH-I hormone is a promising alternative to reproductive control in different animal species. Given the low immunogenicity of this hormone, the use of adjuvants becomes necessary. METHOD OF STUDY: This study evaluated the effects of three adjuvants that induce different immune response profiles over gonadal function, fertility, and expression of GnRH-I. Female mice (n = 6) were vaccinated at days 1 and 30 with a recombinant antigen for immunocastration and different adjuvants that induced preferentially Th1/Th2, Th2, and Th1 immune profiles...
October 19, 2017: American Journal of Reproductive Immunology: AJRI
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