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https://www.readbyqxmd.com/read/28938525/toxic-effects-of-tripterygium-wilfordii-hook-f-on-the-reproductive-system-of-adolescent-male-rats
#1
Xiaoping Jing, Weiwei Cheng, Sheng Guo, Ya Zou, Ting Zhang, Li He
Tripterygium wilfordii Hook F. (TWHF) is a compound extracted from Lei Gong Teng (Thunder God Vine) that has been used to treat a variety of immune-related diseases in clinical practice, particularly in pediatrics. Nevertheless, clinical data indicated that glycosides from Tripterygium wilfordii Hook F (GTW) are toxic to the male reproductive system, but the mechanism is unknown. Here, the administration of a high dose of GTW for 4 weeks and a low dose for 12 weeks can reduce the body weights and testes weights in adolescent male rats...
September 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28938519/gilaburu-viburnum-opulus-l-fruit-extract-alleviates-testis-and-sperm-damages-induced-by-taxane-based-chemotherapeutics
#2
Serpil Sarıözkan, Gaffari Türk, Ayşe Eken, Latife Çakır Bayram, Ayşe Baldemir, Gülden Doğan
In this study, it was aimed to investigate the possible protective effects of gilaburu (Viburnum opulus L., Glb) fruit extract on testis and sperm damages induced by docetaxel (DTX) and paclitaxel (PTX) chemotherapeutics in rats. Sixty adult male Wistar albino rats were divided into 6 equal groups, 10 animals each. The groups were created as control (weekly i.p. saline injection), Glb (weekly i.p. saline injection and daily oral 100mg/kg Glb), DTX (weekly i.p. injection of 5mg/kg DTX), PTX (weekly i.p. injection of 4mg/kg PTX), DTX+Glb (weekly i...
September 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28938492/a-long-noncoding-rna-lncrna-amhr2-plays-a-role-in-amhr2-gene-activation-in-mouse-ovarian-granulosa-cells
#3
Atsushi P Kimura, Ryoma Yoneda, Misuzu Kurihara, Shota Mayama, Shin Matsubara
Anti-Müllerian hormone (AMH) is critical to the regression of Müllerian ducts during mammalian male differentiation and targets ovarian granulosa cells and testicular Sertoli and Leydig cells of adults. Specific effects of AMH are exerted via its receptor, AMH type II receptor (Amhr2), but the mechanism by which the Amhr2 gene is specifically activated is not fully understood. To see whether a proximal promoter was sufficient to Amhr2 gene activation, we generated transgenic mice that bore the enhanced green fluorescent protein (EGFP) gene driven by a 500-bp mouse Amhr2 gene promoter...
September 14, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938440/sex-differences-in-the-hormonal-and-metabolic-response-to-dietary-protein-dilution
#4
Karlton R Larson, Kimberly A Russo, Yanbin Fang, Niloufar Mohajerani, Michael L Goodson, Karen K Ryan
Consumption of a low-protein, high-carbohydrate diet induces a striking increase in circulating fibroblast growth factor-21 (FGF21), which is associated with improved cardiometabolic health and increased longevity. Increased lifespan during this dietary protein 'dilution' has been explained by resource-mediated trade-offs between reproduction and survival, such that fecundity is optimized at a greater relative intake of proteins:carbohydrates. The magnitude of this trade-off is thought to be sex-dependent. Here, we tested the hypothesis that metabolic responses to dietary protein dilution are likewise dependent on sex...
August 9, 2017: Endocrinology
https://www.readbyqxmd.com/read/28937815/differential-allocation-revisited-when-should-mate-quality-affect-parental-investment
#5
Thomas R Haaland, Jonathan Wright, Bram Kuijper, Irja I Ratikainen
Differential allocation (DA) is the adaptive adjustment of reproductive investment (up or down) according to partner quality. A lack of theoretical treatments has led to some confusion in the interpretation of DA in the empirical literature. We present a formal framework for DA that highlights the nature of reproductive benefits versus costs for females mated to males of different quality. Contrary to popular belief, analytical and stochastic dynamic models both show that additive benefits of male quality on offspring fitness have no effect on optimal levels of female investment and thus cannot produce DA...
October 2017: American Naturalist
https://www.readbyqxmd.com/read/28936793/restricted-female-function-of-hermaphrodites-in-a-gynodioecious-shrub-daphne-jezoensis-thymelaeaceae
#6
Akari Shibata, Yoshiaki Kameyama, Gaku Kudo
Gynodioecy is the coexistence of hermaphrodites and females in a population. It is supposed to be an intermediate stage in the evolutionary pathway from hermaphroditism to dioecy in angiosperm. Hermaphrodites gain fitness through both seed and pollen production whereas females gain fitness only through seed production. As females spread in a gynodioecious population, sexual selection prompts hermaphrodites to invest in male function and male-biased hermaphrodites prevail. In the gynodioecious shrub Daphne jezoensis (Thymelaeaceae), female frequency is stably around 50% in most populations, and fruit-set rate of hermaphrodites is commonly low...
September 21, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28936198/social-isolation-modulates-clock-protein-and-beta-catenin-expression-pattern-in-gonadotropin-inhibitory-hormone-neurons-in-male-rats
#7
Chuin Hau Teo, Tomoko Soga, Ishwar S Parhar
Postweaning social isolation reduces the amplitude of the daily variation of CLOCK protein in the brain and induces lower reproductive activity. Gonadotropin-inhibitory hormone (GnIH) acts as an inhibitor in the reproductive system and has been linked to stress. Social isolation has been shown to lower neuronal activity of GnIH-expressing neurons in the dorsomedial hypothalamus (DMH). The exact mechanism by which social isolation may affect GnIH is still unclear. We investigated the impact of social isolation on regulatory cellular mechanisms in GnIH neurons...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28935753/mechanisms-of-transmission-ratio-distortion-at-hybrid-sterility-loci-within-and-between-mimulus-species
#8
Rachel E Kerwin, Andrea L Sweigart
Hybrid incompatibilities are a common correlate of genomic divergence and a potentially important contributor to reproductive isolation. However, we do not yet have a detailed understanding of how hybrid incompatibility loci function and evolve within their native species, or why they are dysfunctional in hybrids. Here, we explore these issues for a well-studied, two-locus hybrid incompatibility between hybrid male sterility 1 (hms1) and hybrid male sterility 2 (hms2) in the closely related yellow monkeyflower species Mimulus guttatus and M...
September 21, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28934723/neural-mechanisms-underlying-the-disruption-of-male-courtship-behavior-by-adult-exposure-to-di-2-ethylhexyl-phthalate-in-mice
#9
Carlos Dombret, Daphné Capela, Kevin Poissenot, Caroline Parmentier, Emma Bergsten, Cédric Pionneau, Solenne Chardonnet, Hélène Hardin-Pouzet, Valérie Grange-Messent, Matthieu Keller, Isabelle Franceschini, Sakina Mhaouty-Kodja
BACKGROUND: Courtship behavior plays a critical role in attracting females and reproduction success. However, the effects of exposure to a ubiquitous contaminant di(2-ethylhexyl) phthalate (DEHP) on these behaviors and, in particular, on courtship vocalizations have not been examined. OBJECTIVE: The effects of adult exposure to DEHP on courtship and mating behaviors and gonadotropic axis and neural mechanisms involved in DEHP-induced effects were analyzed in male mice...
September 1, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28934256/transcriptome-analysis-of-sex-related-genes-in-the-blood-clam-tegillarca-granosa
#10
Heng Chen, Guoqiang Xiao, Xueliang Chai, Xingguan Lin, Jun Fang, Shuangshuang Teng
BACKGROUND: Blood clams (Tegillarca granosa) are one of the most commercial shellfish in China and South Asia with wide distribution in Indo-Pacific tropical to temperate estuaries. However, recent data indicate a decline in the germplasm of this species. Furthermore, the molecular mechanisms underpinning reproductive regulation remain unclear and information regarding genetic diversity is limited. Understanding the reproductive biology of shellfish is important in interpreting their embryology development, reproduction and population structure...
2017: PloS One
https://www.readbyqxmd.com/read/28933362/male-infertility-the-effect-of-natural-antioxidants-and-phytocompounds-on-seminal-oxidative-stress
#11
REVIEW
Malik Adewoyin, Muhammad Ibrahim, Ramli Roszaman, Muhammad Lokman Md Isa, Nur Aizura Mat Alewi, Ainin Azwani Abdul Rafa, Mohd Nur Nasyriq Anuar
Defective sperm function has been identified as the most common cause of infertility. The objective of this study was to review recent findings on the effects of various antioxidants on male fertility. High amounts of poly unsaturated fatty acid are found in the mammalian spermatozoa membranes, thereby making them susceptible to lipid peroxidation. Although, free radicals and reactive oxygen species (ROS) play major roles in reproduction, they are strongly associated with oxidative stress. Furthermore, factors such as obesity, inflammation, pollutants and cigarette smoking are negatively correlated with spermatogenesis...
March 1, 2017: Diseases (Basel)
https://www.readbyqxmd.com/read/28928662/toxicity-of-nanoparticles-on-the-reproductive-system-in-animal-models-a-review
#12
REVIEW
Rahim Dad Brohi, Li Wang, Hira Sajjad Talpur, Di Wu, Farhan Anwar Khan, Dinesh Bhattarai, Zia-Ur Rehman, F Farmanullah, Li-Jun Huo
In the last two decades, nanotechnologies demonstrated various applications in different fields, including detection, sensing, catalysis, electronics, and biomedical sciences. However, public concerns regarding the well-being of human may hinder the wide utilization of this promising innovation. Although, humans are exposed to airborne nanosized particles from an early age, exposure to such particles has risen dramatically within the last century due to anthropogenic sources of nanoparticles. The wide application of nanomaterials in industry, consumer products, and medicine has raised concerns regarding the potential toxicity of nanoparticles in humans...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28917309/toxic-action-of-acmella-oleracea-extract-on-the-male-reproductive-system-of-amblyomma-cajennense-ticks
#13
Luís Adriano Anholeto, Patrícia Rosa de Oliveira, Rodney Alexandre Ferreira Rodrigues, Lais Thiemi Yamane, Karina Neoob de Carvalho Castro, Allan Roberto Fernandes Ferreira, Maria Izabel Camargo-Mathias
The present study evaluated through morphohistological and histochemical techniques the effects of different concentrations of crude ethanolic extract of A. oleracea (EEAO) (Jambu) on the male reproductive system of Amblyomma cajennense sensu stricto (s.s.) ticks. The toxicity of this natural chemical was stablished, signalizing the promising potential of the compound as a strategy to control ectoparasites in the near future. For the experiment, 100 males fed on host rabbits with homogeneous weight (p>0...
September 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28905723/breeding-and-rearing-naked-mole-rats-heterocephalus-glaber-under-laboratory-conditions
#14
Chenlin Yu, Shiyong Wang, Guoshi Yang, Shanmin Zhao, Lifang Lin, Wenjing Yang, Qiu Tang, Wei Sun, Shufang Cui
The unique biologic characteristics of naked mole-rats (NMR, Heterocephalus glaber) include longevity, cancer resistance, hypoxia tolerance, and pain insensitivity, making NMR an attractive model for biomedical research on aging, cancer, and neurobiology. However, breeding and rearing NMR in captivity is challenging. Here, we report a method for breeding NMR by using a closed-colony mating system. We selected sexually mature male and female NMR from different natal colonies and mated them 1:1. The 5 original colonies had an annual parity of 3...
January 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28905182/effects-of-cyproterone-acetate-and-vertically-transmitted-microsporidia-parasite-on-gammarus-pulex-sperm-production
#15
Eric Gismondi, Adeline Fivet, Célia Joaquim-Justo
Endocrine disruption compounds (EDCs) and parasitism can both interfere with the reproduction process of organisms. The amphipod Gammarus pulex is the host of the vertically transmitted microsporidia Dictyocoela duebenum, and this work was devoted to the investigation of the effect of an exposure to the anti-androgen compound, cyproterone acetate (CPA), and/or of the presence of D. duebenum on the spermatozoa production and length. Significant reduction of the spermatozoa production was observed when G. pulex males were uninfected and exposed to CPA...
September 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28895797/neuroendocrine-disruption-of-organizational-and-activational-hormone-programming-in-poikilothermic-vertebrates
#16
REVIEW
Cheryl S Rosenfeld, Nancy D Denslow, Edward F Orlando, Juan Manuel Gutierrez-Villagomez, Vance L Trudeau
In vertebrates, sexual differentiation of the reproductive system and brain is tightly orchestrated by organizational and activational effects of endogenous hormones. In mammals and birds, the organizational period is typified by a surge of sex hormones during differentiation of specific neural circuits; whereas activational effects are dependent upon later increases in these same hormones at sexual maturation. Depending on the reproductive organ or brain region, initial programming events may be modulated by androgens or require conversion of androgens to estrogens...
2017: Journal of Toxicology and Environmental Health. Part B, Critical Reviews
https://www.readbyqxmd.com/read/28895138/feed-backs-among-inbreeding-inbreeding-depression-in-sperm-traits-and-sperm-competition-can-drive-evolution-of-costly-polyandry
#17
Greta Bocedi, Jane M Reid
Ongoing ambitions are to understand the evolution of costly polyandry and its consequences for species ecology and evolution. Emerging patterns could stem from feed-back dynamics between the evolving mating system and its genetic environment, defined by interactions among kin including inbreeding. However, such feed-backs are rarely considered in non-selfing systems. We use a genetically-explicit model to demonstrate a mechanism by which inbreeding depression can select for polyandry to mitigate the negative consequences of mating with inbred males rather than avoiding inbreeding...
September 12, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28894108/description-of-two-three-gendered-nematode-species-in-the-new-genus-auanema-rhabditina-that-are-models-for-reproductive-mode-evolution
#18
Natsumi Kanzaki, Karin Kiontke, Ryusei Tanaka, Yuuri Hirooka, Anna Schwarz, Thomas Müller-Reichert, Jyotiska Chaudhuri, Andre Pires-daSilva
The co-existence of males, females and hermaphrodites, a rare mating system known as trioecy, has been considered as an evolutionarily transient state. In nematodes, androdioecy (males/hermaphrodites) as found in Caenorhabditis elegans, is thought to have evolved from dioecy (males/females) through a trioecious intermediate. Thus, trioecious species are good models to understand the steps and requirements for the evolution of new mating systems. Here we describe two new species of nematodes with trioecy, Auanema rhodensis and A...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893652/a-new-threat-to-human-reproduction-system-posed-by-zika-virus-zikv-from-clinical-investigations-to-experimental-studies
#19
REVIEW
Xiangdong Li, Wenqiang Ma, Gary Wong, Shuoqian Ma, Shihua Li, Yuhai Bi, George F Gao
Zika virus (ZIKV) was first isolated in 1947 from a rhesus monkey in the Zika forest of Uganda. ZIKV has since been silently circulating in a number of equatorial countries for over 50 years. The largest outbreak in humans occurred in Brazil in 2015-2016. Unlike its flavivirus relatives, sexual and post-transfusion transmissions of ZIKV have been reported. In addition, fetal infection can result in microcephaly and congenital Zikv syndrome has been reported in neonates. Moreover, ZIKV RNA can persist for at least 6 months in semen and 11 weeks in vaginal secretions after the infection, suggesting potential tropism for the male and female genital tracts...
September 8, 2017: Virus Research
https://www.readbyqxmd.com/read/28892180/long-term-exposure-to-bisphenol-s-damages-the-visual-system-and-reduces-the-tracking-capability-of-male-zebrafish-danio-rerio
#20
Wenmin Liu, Xiaona Zhang, Penghao Wei, Hua Tian, Wei Wang, Shaoguo Ru
Bisphenol S (BPS) is widely detected in aquatic environments and in human bodies. BPS has reproductive and thyroid disrupting effects, but its effect on the visual system remains unknown. In the present study, zebrafish embryos were exposed to BPS at concentrations of 1, 10, 100 and 1000 μg l(-1) until 120 days post-fertilization in a semistatic system, and the effect of BPS on the visual behavior was examined using the optokinetic response and the optomotor response tests in male zebrafish. The retinal histology, mRNA expression of photoreceptor opsin genes (zfrho, zfblue, zfgr1, zfred and zfuv) and apoptosis-related genes (bax and bcl-2) were also assessed...
September 11, 2017: Journal of Applied Toxicology: JAT
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