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https://www.readbyqxmd.com/read/28723674/nanoparticles-and-female-reproductive-system-how-do-nanoparticles-affect-oogenesis-and-embryonic-development
#1
REVIEW
Cong-Cong Hou, Jun-Quan Zhu
Along with the increasing application of nanoparticles (NPs) in many walks of life, environmental exposure to NPs has raised considerable health concerns. When NPs enter a pregnant woman's body through inhalation, venous injection, ingestion or skin permeation, maternal toxic stress reactions such as reactive oxygen species (ROS), inflammation, apoptosis and endocrine dyscrasia are induced in different organs, particularly in the reproductive organs. Recent studies have shown that NPs disturb the developing oocyte by invading the protective barrier of theca cells, granulosa cell layers and zona pellucida...
July 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28722165/dimorphic-ejaculates-and-sperm-release-strategies-associated-with-alternative-mating-behaviors-in-the-squid
#2
Lígia H Apostólico, José E A R Marian
Sperm competition is a powerful postcopulatory selective force influencing male adaptations associated with increasing fertilization success, and it is usually related to the evolution of different strategies of ejaculate expenditure between individuals. Ejaculates may also be influenced by additional selective pressures associated with sperm competition, such as timing between insemination and fertilization, female reproductive tract morphology, and fertilization environment. Also, males that adopt alternative mating tactics may face distinct sperm competition pressures, which may lead to the evolution of intraspecific diversity in ejaculates...
July 18, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28715410/cloning-of-hsp90-expression-and-localization-of-hsp70-90-in-different-tissues-including-lactating-non-lactating-yak-bos-grunniens-breast-tissue
#3
Penggang Liu, Sijiu Yu, Yan Cui, Junfeng He, Chuan Yu, Zexing Wen, Yangyang Pan, Kun Yang, Liangli Song, Xue Yang
The aim of this study is to investigate the expression and localization of HSP70/90 in different tissues and explore the regulation effects of HSP70/90 at lactation period of female yaks. HSP90 mRNA was cloned from the heart samples of female yaks, Quantitative real-time (qRT-PCR), Western blotting (WB), immunohistochemistry and immunofluorescence assays were utilized to analyze the expressions of HSP70/90 mRNA and protein in different tissues. Sequence analysis showed that HSP90 is a conserved molecular chaperone of female yaks...
2017: PloS One
https://www.readbyqxmd.com/read/28715094/drosophila-mutants-lacking-octopamine-exhibit-impairment-in-aversive-olfactory-associative-learning
#4
Konstantin G Iliadi, Natalia Iliadi, Gabrielle L Boulianne
Octopamine is a biogenic amine in invertebrates that is considered a functional homolog of vertebrate norepinephrine, acting as a neurotransmitter, neuromodulator and neurohormone. Octopamine regulates many physiological processes such as metabolism, reproduction and different types of behaviour including learning and memory. Previous studies in insects led to the notion that acquisition of an olfactory memory depends on the octopaminergic system during appetitive (reward-based) learning, but not in the case of aversive (punishment-based) learning...
July 17, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28712675/ejaculates-are-not-used-as-nuptial-gifts-in-simultaneously-hermaphroditic-snails
#5
Monica Lodi, Fedde W Meijer, Joris M Koene
Promoted by sexual selection, males usually adopt different ways to increase their fertilization chances. In many insect taxa males donate nuptial gifts, together with sperm, which represent a valuable additional nutrient source that females can use to provision eggs. This has also been suggested to occur in simultaneous hermaphrodites, organisms with both sex functions. In theory, donation of nuptial gifts or extra nutrients might work in hermaphrodites that mate unilaterally (one-way donation of ejaculates), but will not be effective when these organisms mate reciprocally (mutual exchange of ejaculates), since on average each partner would receive the amount it also transfers...
May 25, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28707080/reproductive-outcomes-of-anestrous-goats-supplemented-with-spineless-opuntia-megacantha-salm-dyck-protein-enriched-cladodes-and-exposed-to-the-male-effect
#6
Cesar A Meza-Herrera, Omag Cano-Villegas, Arnoldo Flores-Hernandez, Francisco G Veliz-Deras, Guadalupe Calderon-Leyva, Juan M Guillen-Muñoz, Cristina García de la Peña, Cesar A Rosales-Nieto, Ulises Macias-Cruz, Leonel Avendaño-Reyes
The possible influence of the "male effect" upon reproductive outcomes of adult anestrous goats under marginal rangeland conditions and supplemented with protein-enriched Opuntia megacantha Salm-Dyck was evaluated. Reproductive variables included: estrus percentage (EST, %), estrus latency (ESL, hours), ovulation percentage (OP, %), ovulation rate (OR, units), average largest follicle at ovulation (LFO, mm), largest corpus luteum (LCL, mm), embryo number (EBN, units), and embryo implantation percentage (EIP, %)...
July 13, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28706850/pneumothorax-caused-by-cystic-and-nodular-lung-metastases-from-a-malignant-uterine-perivascular-epithelioid-cell-tumor-pecoma
#7
Shouichi Okamoto, Moegi Komura, Yasuhisa Terao, Aiko Kurisaki-Arakawa, Takuo Hayashi, Tsuyoshi Saito, Shinsaku Togo, Akira Shiokawa, Keiko Mitani, Etsuko Kobayashi, Toshio Kumasaka, Kazuhisa Takahashi, Kuniaki Seyama
Perivascular epithelioid cell tumors (PEComas) are mesenchymal neoplasms with immunoreactivity for both melanocytic and smooth muscle markers. PEComas occur at multiple sites, and malignant PEComas can undergo metastasis, recurrence and aggressive clinical courses. Although the lung is a common metastatic site of PEComas, they usually appear as multiple nodules but rarely become cystic or cavitary. Here, we describe a female patient whose lungs manifested multiple cystic, cavity-like and nodular metastases 3 years after the resection of uterine tumors tentatively diagnosed as epithelioid smooth muscle tumors with uncertain malignant potential...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28706321/cryptaphelenchus-varicaudatus-n-sp-rhabditida-ektaphelenchinae-from-tehran-province-iran
#8
Majid Pedram
Cryptaphelenchus varicaudatus n. sp. is described and illustrated. It was isolated from bark samples of dead or dying pine (Pinus spp.) trees with bark beetle frass and galleries, in Tehran province. The new species has 275- to 367-µm-long females (a medium-sized species) with distinctly annulated cuticle having three bands in lateral fields, lip region continuous with body contour, delicate knobbed stylet, monodelphic-prodelphic reproductive system with distinct spermatheca, short postvulval uterine sac (PUS), transverse vulval slit with raised posterior lip and body narrowing behind it, sclerotized vagina, simple intestine ending in a blind sac, having no rectum but vestigial anus in some specimens, and distal body end tip (tail tip) with variation in morphology (shape), from sharply or slightly pointed to bluntly rounded...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28705828/crispr-induced-null-alleles-show-that-frost-protects-drosophila-melanogaster-reproduction-after-cold-exposure
#9
Claire E Newman, Jantina Toxopeus, Hiroko Udaka, Soohyun Ahn, David M Martynowicz, Steffen P Graether, Brent J Sinclair, Anthony Percival-Smith
The ability to survive and reproduce after cold exposure is important in all kingdoms of life. However, even in a sophisticated genetic model system like Drosophila melanogaster, few genes have been identified as functioning in cold tolerance. The accumulation of the Frost (Fst) gene transcript increases after cold exposure, making it a good candidate for a gene that has a role in cold tolerance. However, despite extensive RNAi knockdown analysis, no role in cold tolerance has been assigned to Fst CRISPR is an effective technique for completely knocking down genes, and less likely to produce off-target effects than GAL4-UAS RNAi systems...
July 13, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28705369/magnetic-resonance-imaging-of-pelvic-masses-a-compartmental-approach
#10
Kiran Gangadhar, Abhishek Mahajan, Nilesh Sable, Puneet Bhargava
Magnetic resonance imaging (MRI) is often "one stop shop" for evaluating female pelvic masses that helps in diagnosis, staging, and restaging of these tumors. A pelvic mass can arise from any tissue present within the pelvis. Although most masses in the female pelvis arise from the reproductive organs, masses may also arise from the gastrointestinal tract, urinary system, adjacent soft tissues, peritoneum, etc. It may not always be possible to determine the site of origin or distinguish these masses based on imaging characteristics...
June 2017: Seminars in Ultrasound, CT, and MR
https://www.readbyqxmd.com/read/28701755/microbiota-composition-of-the-koala-phascolarctos-cinereus-ocular-and-urogenital-sites-and-their-association-with-chlamydia-infection-and-disease
#11
Miranda E Vidgen, Jonathan Hanger, Peter Timms
Disease caused by Chlamydia pecorum is characterised by ocular and urogenital infections that can lead to blindness and infertility in koalas. However, koalas that are infected with C. pecorum do not always progress to disease. In other host systems, the influence of the microbiota has been implicated in either accelerating or preventing infections progressing to disease. This study investigates the contribution of koala urogenital and ocular microbiota to Chlamydia infection and disease in a free ranging koala population...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700426/coexisting-primary-ovarian-and-omental-hydatid-disease-mimicking-an-ovarian-neoplasm-a-case-report
#12
Emre E Tas, Gulin F Yegin Akcay, Fatma Yildirim, Filiz Yavuz
Hydatid disease is a parasitic infection that most commonly affects the liver and lungs, although the disease can arise in any part of the body. Cysts may mimic many benign and malignant conditions. The diagnosis cannot be confirmed preoperatively in all cases. A 44-yr-old menopausal woman was admitted to the department of gynecology with complaints of abdominal distention. A fixed abdominopelvic mass was identified. Radiology revealed a 20-cm mass with branched septations and solid components. CA-125 level was 55 kU/L, and Risk of Malignancy Index-2 score was 880...
July 11, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28699305/enhancement-of-the-lh-surge-by-male-olfactory-signals-is-associated-with-avpv-kiss1-cell-activation-in-female-rats
#13
Youki Watanabe, Kana Ikegami, Ren Ishigaki, Nahoko Ieda, Yoshihisa Uenoyama, Kei-Ichiro Maeda, Hiroko Tsukamura, Naoko Inoue
Olfactory stimuli play an important role in regulating reproductive functions in mammals. The present study investigated the effect of olfactory signals derived from male rats on kisspeptin neuronal activity and luteinizing hormone (LH) secretion in female rats. Wistar-Imamichi strain female rats were ovariectomised (OVX) and implanted with preovulatory levels of oestradiol-17β (E2). OVX+E2 rats were sacrificed 1 hour after exposure to either: clean bedding, female-soiled bedding or male-soiled bedding. Dual staining for Kiss1 mRNA in situ hybridization and c-Fos immunohistochemistry revealed that the numbers of Kiss1-expressing cells and c-Fos-immunopositive Kiss1-expressing cells in the anteroventral periventricular nucleus (AVPV) were significantly higher in OVX+E2 rats exposed to male-soiled bedding than those of the other groups...
July 12, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28695774/regulatory-risk-assessments-is-there-a-need-to-reduce-uncertainty-and-enhance-robustness-update-on-propylparaben-in-relation-to-its-eu-regulatory-status
#14
D Snodin
Over 10 years ago, propylparaben (propyl- p-hydroxybenzoate; PP) was withdrawn as a permitted food preservative in the EU based entirely on findings reported in a single dietary study in juvenile rats claiming to show adverse effects on male reproductive parameters [Oishi S. Effects of propyl paraben on the male reproductive system. Food Chem Toxicol 2002; 40(12): 1807 -1813]. Subsequent data reviews have cast serious doubt on the validity of the Oishi results, mainly in relation to aberrant concurrent-control values, and in two further comprehensive studies using neonatal and juvenile rats there were no adverse effects in males at oral doses up to 1000 mg/kg/day...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28694502/g-protein-coupled-receptor-64-is-required-for-decidualization-of-endometrial-stromal-cells
#15
Jung-Yoon Yoo, Jong Il Ahn, Tae Hoon Kim, Sungryul Yu, Ji Yeon Ahn, Jeong Mook Lim, Jae-Wook Jeong
Although GPR64 has an important role for male fertility, its physiological roles in the female reproductive system are still unknown. In the present study, immunohistochemical analysis reveals a spatiotemporal expression of GPR64 in the uterus during early pregnancy. Observation of remarkable induction of GPR64 expression in uterine decidual cells points to its potential physiological significance on decidualization. The decidualization of uterine stromal cells is a key event in implantation. Progesterone (P4) signaling is crucial for the decidualization of the endometrial stromal cells for successful pregnancy...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694056/the-involvement-of-rhopr-crf-dh-in-feeding-and-reproduction-in-the-blood-gorging-insect-rhodnius-prolixus
#16
Shirin Mollayeva, Ian Orchard, Angela B Lange
Rhodnius prolixus is a blood-gorging insect and a vector for human Chagas disease. The insect transmits the disease following feeding, when it excretes urine and feces contaminated with the Trypanosoma cruzi parasite. A corticotropin-releasing factor-like peptide acts as a diuretic hormone in R. prolixus (Rhopr-CRF/DH); however, its distribution throughout the insect's central nervous system (CNS) and the expression of its receptor in feeding-related tissue as well as the female reproductive system suggests a multifaceted role for the hormone beyond that of diuresis...
July 7, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28693649/morphological-and-molecular-characterization-of-tarantobelus-arachnicida-gen-n-sp-n-nematoda-rhabditida-brevibuccidae-a-parasitic-nematode-of-tarantulas
#17
J Abolafia, R Peña-Santiago
A new genus and new species, Tarantobelus arachnicida, was found in the oral opening of tarantula spiders bred in captivity in Poland. The new species is characterized by having a small body (0.77-0.95 mm long in females and 0.66-0.84 mm in males), cuticle poorly annulated by transverse incisures, lateral field inconspicuous, lips separated with small cuticular flaps topping each lip, stoma panagrolaimoid with gymnostom well developed with robust and refringent rhabdia, pharynx panagrolaimoid with isthmus slightly longer than the basal bulb, intestine with cardiac (anterior) and rectal (posterior) areas with narrower walls...
July 11, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28691222/the-morphology-of-the-male-reproductive-system-spermatogenesis-and-the-spermatozoon-of-daphnia-magna-crustacea-branchiopoda
#18
Maggie Wuerz, Erwin Huebner, Judith Huebner
This study analyses the histological and cellular morphology of the testis and sperm development in the male Daphnia magna Straus 1820. Due to the rarity of males and predominately parthenogenetic lifecycle of Daphnia, there has been limited detailed information on males in contrast to the well-studied female. Using light and electron microscopy approaches, we describe the morphology of the testis during the progression from an immature to mature testis. The testis has an encasing muscular mesh sheath outside the basal lamina, beneath which is a thin somatic epithelial cell layer...
July 10, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28690799/sex-biased-oviposition-by-a-nursery-pollinator-on-a-gynodioecious-host-plant-implications-for-breeding-system-evolution-and-evolution-of-mutualism
#19
Laura A D Doubleday, Lynn S Adler
Dioecy, a breeding system where individual plants are exclusively male or female, has evolved repeatedly. Extensive theory describes when dioecy should arise from hermaphroditism, frequently through gynodioecy, where females and hermaphrodites coexist, and when gynodioecy should be stable. Both pollinators and herbivores often prefer the pollen-bearing sex, with sex-specific fitness effects that can affect breeding system evolution. Nursery pollination, where adult insects pollinate flowers but their larvae feed on plant reproductive tissues, is a model for understanding mutualism evolution but could also yield insights into plant breeding system evolution...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28689064/transfer-of-zearalenone-to-the-reproductive-system-of-female-rainbow-trout-spawners-a-potential-risk-for-aquaculture-and-fish-consumers
#20
Maciej Woźny, Kazimierz Obremski, Tomasz Zalewski, Maren Mommens, Alicja Łakomiak, Paweł Brzuzan
To investigate whether ZEN transfers from the alimentary tract of fish to the somatic cells of ovaries or the oocytes, mature females of rainbow trout were orally exposed to ZEN at a dose of 1 mg·kg(-)(1) body mass. At sampling times of 2, 6, 12, 24, 48, and 96 h, tissues of the fish (intestine, liver, ovaries, oocytes, muscles, and plasma) were extracted to determine the concentration of ZEN and its metabolites using immunoaffinity columns and HPLC-FLD. Our results confirm that ZEN is transferred from the alimentary tract to the reproductive system of the fish, and indicate that the mycotoxin concentrates in the somatic cells of the ovaries...
July 5, 2017: Food and Chemical Toxicology
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