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https://www.readbyqxmd.com/read/29684354/updated-distribution-and-experimental-life-history-traits-of-the-recently-invasive-snail-lissachatina-fulica-in-havana-cuba
#1
Antonio A Vázquez, Jorge Sánchez, Annia Alba, Elizabeth Martínez, Luis Alvarez-Lajonchere, Michel Matamoros, James B Coupland
The giant African snail Lissachatina fulica has been reported invading Cuba since 2014 and is now well established in areas of Havana and several nearby regions. This invasive species is of major concern to health authorities given its role as an important vector of parasites such as Angiostrongylus cantonensis, the causative agent of eosinophilic meningoencephalitis in humans. Here, we update the distribution within Cuba. We also report on our studies of experimental life-history traits to assess the population dynamics and potential for spread of this species in Cuba...
April 20, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29684203/the-most-developmentally-truncated-fishes-show-extensive-hox-gene-loss-and-miniaturized-genomes
#2
Martin Malmstrøm, Ralf Britz, Michael Matschiner, Ole K Tørresen, Renny Kurnia Hadiaty, Norsham Yaakob, Heok Hui Tan, Kjetill Sigurd Jakobsen, Walter Salzburger, Lukas Rüber
The world's smallest fishes belong to the genus Paedocypris. These miniature fishes are endemic to an extreme habitat: the peat swamp forests in Southeast Asia, characterized by highly acidic blackwater. This threatened habitat is home to a large array of fishes, including a number of miniaturized but also developmentally truncated species. Especially the genus Paedocypris is characterized by profound, organism-wide developmental truncation, resulting in sexually mature individuals of <8 mm in length with a larval phenotype...
April 1, 2018: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29681919/efficient-gene-transfer-and-gene-editing-in-sterlet-acipenser-ruthenus
#3
Ji Chen, Wei Wang, Zhaohui Tian, Ying Dong, Tian Dong, Hua Zhu, Zuoyan Zhu, Hongxia Hu, Wei Hu
The sturgeon (Acipenseriformes) is an important farmed species because of its economical value. However, neither gene transfer nor gene editing techniques have been established in sturgeon for molecular breeding and gene functional study until now. In this study, we accomplished gene transfer and gene editing in sterlet ( Acipenser ruthenus ), which has the shortest sexual maturation period of sturgeons. The plasmid encoding enhanced green fluorescent protein (EGFP) was transferred into the embryos of sterlet at injection concentration of 100 ng/μL, under which condition high survival rate and gene transfer rate could be achieved...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29680871/cystic-tumors-of-the-pituitary-infundibulum-seminal-autopsy-specimens-1899-to-1904-that-allowed-clinical-pathological-craniopharyngioma-characterization
#4
José M Pascual, Ruth Prieto, Maria Rosdolsky, Sewan Strauss, Inés Castro-Dufourny, Verena Hofecker, Eduard Winter, Rodrigo Carrasco, Walter Ulrich
A heterogeneous group of epithelial cystic tumors developed at the infundibulum and the third ventricle disconcerted pathologists at the dawn of the twentieth century. Very little was known at that time about the physiological role played by the pituitary gland, and there was almost complete ignorance regarding the function of the hypothalamus. Acromegaly, or enlargement of acral body parts, described in 1886 by Pierre Marie, was the only disease linked to primary hypertrophies of the pituitary gland, known as "pituitary strumas"...
April 21, 2018: Pituitary
https://www.readbyqxmd.com/read/29679684/expression-profile-and-reproductive-regulation-of-apgwamide-in-pacific-abalone-haliotis-discus-hannai
#5
Kyeong Seop Kim, Tae Ha Kim, Mi Ae Kim, Jung Sick Lee, Young Chang Sohn
Neuropeptides in the central nervous system regulate reproductive activities in vertebrates. Ala-Pro-Gly-Trp-NH2 (APGWamide), a neuromediator expressed in the neural ganglia of mollusks, controls sexual maturation and reproduction. To clarify the role of APGWamide in sexual behavior regulation and gamete cell maturation in mollusks, we cloned the cDNA of APGWamide precursor (Hdh-APGWamide) and examined the spatiotemporal expression of the transcript in the Pacific abalone Haliotis discus hannai. The 222-amino acid sequence of the precursor deduced from the cDNA sequence showed typical features of gastropod APGWamide precursors...
April 18, 2018: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/29678725/cloning-and-characterization-of-a-second-lamprey-pituitary-glycoprotein-hormone-thyrostimulin-gpa2-gpb5
#6
Krist N Hausken, Belen Tizo, Michal Shpilman, Shannon Barton, Wayne Decatur, David Plachetzki, Scott Kavanaugh, Sabah Ul-Hasan, Berta Levavi-Sivan, Stacia A Sower
A novel heterodimeric glycoprotein hormone (GpH) comprised of alpha (GpA2) and beta (GpB5) subunits was discovered in 2002 and called thyrostimulin for its ability to activate the TSH receptor in mammals, but its central function in vertebrates has not been firmly established. We report here the cloning and expression of lamprey (l)GpB5, and its ability to heterodimerize with lGpA2 to form a functional l-thyrostimulin. The full-length cDNA of lGpB5 encodes 174 amino acids with ten conserved cysteine residues and one glycosylation site that is conserved with other vertebrate GpB5 sequences...
April 17, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29676516/the-pea-leafminer-liriomyza-huidobrensis-diptera-agromyzidae-uses-the-vibrational-duets-for-efficient-sexual-communication
#7
Jin Ge, Jia-Ning Wei, Ding-Jie Zhang, Chun Hu, De-Zhi Zheng, Le Kang
The pea leafminer (Liriomyza huidobrensis) is a notorious pest of vegetables and ornamental plants worldwide. Despite a large number of studies on its biology and ecology, the courtship behavior and sexual communication of this species remain unclear. Here, we studied the vibrational communication in the sexual interaction of the pea leafminer. On host plant leaves, females and males behaviorally displayed the bobbing-quivering alternation, which finally led to copulation. Moreover, records of laser vibrometry revealed three-signal duets underlying the behavioral alternation...
April 20, 2018: Insect Science
https://www.readbyqxmd.com/read/29673697/adrenocortical-development-lessons-from-mouse-models
#8
Typhanie Dumontet, Isabelle Sahut-Barnola, Amandine Septier, Nathanaëlle Montanier, Ingrid Plotton, Florence Roucher-Boulez, Véronique Ducros, Anne-Marie Lefrançois-Martinez, Jean-Christophe Pointud, Mohamad Zubair, Ken-Ichirou Morohashi, David T Breault, Pierre Val, Antoine Martinez
The adrenocortical gland undergoes structural and functional remodelling in the fetal and postnatal periods. After birth, the fetal zone of the gland undergoes rapid involution in favor of the definitive cortex, which reaches maturity with the emergence of the zona reticularis(zR) at the adrenarche. The mechanisms underlying the adrenarche, the process leading to pre-puberty elevation of plasma androgens in higher primates, remain unknown, largely due to lack of any experimental model. By following up fetal and definitive cortex cell lines in mice, we showed that activation of protein kinase A (PKA) signaling mainly impacts the adult cortex by stimulating centripetal regeneration, with differentiation and then conversion of the zona fasciculata into a functional zR...
April 16, 2018: Annales D'endocrinologie
https://www.readbyqxmd.com/read/29672316/immunolocalization-of-receptor-and-chemoreceptor-modules-in-the-sheep-vomeronasal-organ
#9
Dalia Ibrahim
The vomeronasal organ (VNO) is the peripheral receptor organ of the accessory olfactory system, which is responsible for both sexual and innate behaviors. The degree of neuronal differentiation and maturation of the vomeronasal receptor cells together with the verification of the presence of the solitary chemoreceptor cells (SCCs) in the VNO of Corriedale sheep were assessed using immunofluorescence. A protein gene product 9.5 (PGP 9.5), which is a neuronal marker recognized to be expressed in most neurons of vertebrate species, an olfactory marker protein (OMP) that is precise for mature olfactory receptor cells, and lastly phospholipase C-β2 (PLC-β2), a marker in the signal transduction pathway of SCCs, were all tested...
April 19, 2018: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29669587/comparison-of-methods-to-assess-onset-of-breast-development-in-the-legacy-girls-study-methodological-considerations-for-studies-of-breast-cancer
#10
Lauren C Houghton, Julia A Knight, Mary Jane De Souza, Mandy Goldberg, Melissa L White, Karen O'Toole, Wendy K Chung, Angela R Bradbury, Mary B Daly, Irene L Andrulis, Esther M John, Saundra S Buys, Mary Beth Terry
BACKGROUND: Younger age at onset of breast development, which has been declining in recent decades, is associated with increased breast cancer risk independent of age at menarche. Given the need to study the drivers of these trends, it is essential to validate methods to assess breast onset that can be used in large-scale studies when direct clinical assessment of breast onset is not feasible. METHODS: Breast development is usually measured by Tanner stages (TSs), assessed either by physical examination or by mother's report using a picture-based Sexual Maturation Scale (SMS)...
April 18, 2018: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29669189/multi-method-approach-to-the-early-postnatal-growth-of-the-mandible-in-mice-from-a-zone-of-robertsonian-polymorphism
#11
Jessica Martínez-Vargas, Francesc Muñoz-Muñoz, María José López-Fuster, Jorge Cubo, Jacint Ventura
The western European house mouse (Mus musculus domesticus) shows high karyotypic diversity owing to Robertsonian translocations. Morphometric studies conducted with adult mice suggest that karyotype evolution due to these chromosomal reorganizations entails variation in the form and the patterns of morphological covariation of the mandible. However, information is much scarcer regarding the effect of these rearrangements on the growth pattern of the mouse mandible over early postnatal ontogeny. Here we compare mandible growth from the second to the eighth week of postnatal life between two ontogenetic series of mice from wild populations, with the standard karyotype and with Robertsonian translocations respectively, reared under the same conditions...
April 18, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29668033/sexual-dimorphism-in-postnatal-gonadotropin-levels-in-infancy-reflects-diverse-maturation-of-the-ovarian-and-testicular-hormone-synthesis
#12
Tanja Kuiri-Hänninen, Leo Dunkel, Ulla Sankilampi
BACKGROUND: The postnatal gonadotropin surge is sexually dimorphic: FSH levels predominate in girls and LH levels in boys. However, in preterm (PT) girls, both gonadotropin levels are higher than in PT boys. OBJECTIVE: To evaluate how gonadal maturation contributes to the sex differences in FSH and LH. DESIGN: Monthly follow-up of 58 full-term (FT, 29 boys) and 67 PT (33 boys) infants from one week (D7) to six months of age (M1-M6). Analyses were also done according to postmenstrual (PM) age in PT infants...
April 18, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29666334/oestrogen-regulates-the-expression-of-cathepsin-e-a-like-gene-through-er%C3%AE-in-liver-of-chicken-gallus-gallus
#13
Hang Zheng, Hong Li, Wenbo Tan, Chunlin Xu, Lijuan Jia, Dandan Wang, Zhuanjian Li, Gunrong Sun, Xiangtao Kang, Fengbin Yan, Xiaojun Liu
The cathepsin E-A-like, also known as 'similar to nothepsin', is a new member of the aspartic protease family, which may take part in processing of egg yolk macromolecules, due to it was identified in the chicken egg-yolk. Previously, studies have suggested that the expression of cathepsin E-A-like increased gradually during sexual maturation of pullets, but the exact regulation mechanism is poorly understood. In this study, to gain insight into the function and regulation mechanism of the gene in egg-laying hen, we cloned the cathepsin E-A-like gene and evaluated its evolutionary origin by using both phylogenetic and syntenic methods...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29660124/age-and-growth-of-the-endemic-xingu-river-stingray-potamotrygon-leopoldi-validated-using-fluorescent-dyes
#14
P Charvet, F M Santana, K L de Lima, R Lessa
Between 2003 and 2005, vertebrae of 151 Xingu River Potamotrygon leopoldi (Potamotrygonidae) (75 males and 76 females) were analysed to derive a growth curve for this species. The disc width (WD ) was significantly different between sexes, with females measuring 149-700 mm WD and males 109-500 mm WD . The average percentage error for vertebrae readings of the whole sample was 2.7%. The marginal increment ratio (RMI ) showed an increasing trend with the highest value in November, decreasing from December on...
April 16, 2018: Journal of Fish Biology
https://www.readbyqxmd.com/read/29659892/effect-of-physiological-state-on-female-melon-fly-diptera-tephritidae-attraction-to-host-and-food-odor-in-the-field
#15
Roger I Vargas, Jaime C Piñero, Neil W Miller
Foraging behavior of wild female melon fly, Bactrocera (Zeugodacus) cucurbitae Coquillett, a worldwide pest of economically important cucurbit crops, was examined through mark and recapture studies in both wild (Kona: dominated by the invasive weed ivy gourd, Coccinea grandis [L.] Voigt [Cucurbitaceae]), and cultivated (Kapoho: dominated by papaya, Carica papaya L. [Caricaceae] orchards) habitats on Hawaii Island. In particular, the extent to which wild melon flies and color-marked F2 females responded to cucumber odor and Solulys yeast hydrolysate laced with ammonium acetate (1%, wt/vol) according to sexual maturity stage and degree of protein hunger was documented...
April 12, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29657005/comparison-of-six-commercial-antigen-kits-for-detection-of-dirofilaria-immitis-infections-in-canines-with-necropsy-confirmed-heartworm-status
#16
Laura G Henry, Katherine J Brunson, Heather S Walden, Nanny Wenzlow, Sarah E Beachboard, Kelli L Barr, Maureen T Long
Patient-side test kits for detecting antigenemia in dogs associated with sexually mature female heartworms (Dirofilaria immitis) have been available for three decades, and these tests are continually updated and improved. To define the sensitivity (Se) and specificity (Sp) of contemporary antigen detection tests against cardiopulmonary D. immitis burden, we evaluated five patient-side kits-Anigen Rapid One Step® (Bio note), SNAP® 4Dx Plus Test Kit (IDEXX), WITNESS® Heartworm Canine Heartworm Antigen Test Kit (Zoetis), VetScan® Canine Heartworm Rapid Test (Abaxis), and Solo Step® CH Canine Heartworm Antigen Test (Heska), and one microplate ELISA (DiroCHEK® ; Zoetis), using archived canine sera divided into five subclasses of female worms (0, 1-5, 6-20, 21-40, and >40)...
April 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29650061/comparison-of-sperm-motility-subpopulation-structure-among-wild-anadromous-and-farmed-male-atlantic-salmon-salmo-salar-parr-using-a-casa-system
#17
Carina Caldeira, Almudena García-Molina, Anthony Valverde, Daznia Bompart, Megan Hassane, Patrick Martin, Carles Soler
Atlantic salmon (Salmo salar) is an endangered freshwater species that needs help to recover its wild stocks. However, the priority in aquaculture is to obtain successful fertilisation and genetic variability to secure the revival of the species. The aims of the present work were to study sperm subpopulation structure and motility patterns in wild anadromous males and farmed male Atlantic salmon parr. Salmon sperm samples were collected from wild anadromous salmon (WS) and two generations of farmed parr males...
April 13, 2018: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29649968/swimming-exercise-to-control-precocious-maturation-in-male-seabass-dicentrarchus-labrax
#18
Marco Graziano, Raul Benito, Josep V Planas, Arjan P Palstra
BACKGROUND: Male European seabass, already predominant (~ 70%) in cultured stocks, show a high incidence (20-30%) of precocious sexual maturation under current aquaculture practices, leading to important economic losses for the industry. In view of the known modulation of reproductive development by swimming exercise in other teleost species, we aimed at investigating the effects of sustained swimming on reproductive development in seabass males during the first year of life in order to determine if swimming could potentially reduce precocious sexual maturation...
April 12, 2018: BMC Developmental Biology
https://www.readbyqxmd.com/read/29648944/parents-concerns-regarding-the-growth-characteristics-of-their-adolescents-a-qualitative-inquiry-in-iran
#19
Mohammad Ali Cheraghi, Parvaneh Rezasoltani, AbouAli Vedadhir, Ziba Taghizadeh, Seyyed Hossein Samadanifard
In recent times, parents have become increasingly concerned, both subjectively and objectively, about their adolescents' body height/weight growth. Parent-adolescent interactions about this issue and the potential socio-psychological consequences of such interactions should be considered as an important influencing factor on the future of adolescents' sexual and reproductive health. To achieve a greater understanding of such concerns, it is necessary to further elucidate parents' experiences on this topic, so as to expand the existing literature...
December 2018: International Journal of Qualitative Studies on Health and Well-being
https://www.readbyqxmd.com/read/29643273/mpf-based-meiotic-cell-cycle-control-half-a-century-of-lessons-from-starfish-oocytes
#20
Takeo Kishimoto
In metazoans that undergo sexual reproduction, genomic inheritance is ensured by two distinct types of cell cycle, mitosis and meiosis. Mitosis maintains the genomic ploidy in somatic cells reproducing within a generation, whereas meiosis reduces by half the ploidy in germ cells to prepare for successive generations. The meiotic cell cycle is believed to be a derived form of the mitotic cell cycle; however, the molecular mechanisms underlying both of these processes remain elusive. My laboratory has long studied the meiotic cell cycle in starfish oocytes, particularly the control of meiotic M-phase by maturation- or M phase-promoting factor (MPF) and the kinase cyclin B-associated Cdk1 (cyclin B-Cdk1)...
2018: Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
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