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https://www.readbyqxmd.com/read/28550793/acute-gonadotropin-releasing-hormone-agonist-treatment-enhances-extinction-memory-in-male-rats
#1
L Y Maeng, M B Taha, K K Cover, S S Glynn, M Murillo, K Lebron-Milad, M R Milad
Leuprolide acetate (LEU), also known as Lupron, is commonly used to treat prostate cancer in men. As a gonadotropin-releasing hormone (GnRH) receptor agonist, it initially stimulates the release of gonadal hormones, testosterone (T) and estradiol. This surge eventually suppresses these hormones, preventing the further growth and spread of cancer cells. Individuals receiving this treatment often report anxiety and cognitive changes, but LEU's effects on the neural mechanisms that are involved in anxiety during the trajectory of treatment are not well known...
May 17, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28550508/metastatic-gestational-choriocarcinoma-a-masquerader-in-obstetrics
#2
REVIEW
C M McCarthy, J Unterscheider, C Burke, J Coulter
We describe a case of a 36-year-old woman presenting with vaginal bleeding and suboptimally rising serum human chorionic gonadotropin levels, who was investigated for a pregnancy of unknown location. Ultrasonography, laparoscopy and dilatation and curettage failed to reveal signs of an intra-uterine or intra-abdominal pregnancy. Following computed tomography imaging, a mediastinal mass was histologically determined to be a gestational choriocarcinoma. Following surgical resection and chemotherapy, the patient recovered and proceeded to have a successful intra-uterine pregnancy...
May 26, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28550141/role-of-dynamin-src-and-ras-in-the-protein-kinase-c-mediated-activation-of-erk-by-gonadotropin-releasing-hormone
#3
Outhiriaradjou Benard, Zvi Naor, Rony Seger
No abstract text is available yet for this article.
May 26, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28550137/c-src-is-activated-by-the-epidermal-growth-factor-receptor-in-a-pathway-that-mediates-jnk-and-erk-activation-by-gonadotropin-releasing-hormone-in-cos7-cells
#4
Sarah Kraus, Outhiriaradjou Benard, Zvi Naor, Rony Seger
No abstract text is available yet for this article.
May 26, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28550133/the-erk-signaling-cascade-inhibits-gonadotropin-stimulated-steroidogenesis
#5
Rony Seger, Tamar Hanoch, Revital Rosenberg, Ada Dantes, Wolfgang E Merz, Jerome F Strauss, Abraham Amsterdam
No abstract text is available yet for this article.
May 26, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28548230/molecular-basis-of-social-competence-in-medaka-fish
#6
REVIEW
Teruhiro Okuyama, Saori Yokoi, Hideaki Takeuchi
Oryzias latipes (Medaka) is an established vertebrate model for studying developmental genetics, genomics, and evolutionary biology. The physiology, embryology, and genetics of this species have been extensively investigated for centuries. Medaka fish recently attracted attention in the field of social neuroscience. This review introduces recent advances in medaka behavioral studies, focusing on female mating preferences and male mate-guarding behaviors. The medaka female has the ability to discriminate male individuals and prefers to mate with socially familiar males (female mating preference)...
May 26, 2017: Development, Growth & Differentiation
https://www.readbyqxmd.com/read/28546123/distribution-of-tyrosine-hydroxylase-immunoreactive-neurons-in-the-brain-of-the-viviparous-fish-gambusia-affinis
#7
Shilpa K Bhat, C B Ganesh
Tyrosine hydroxylase (TH) is the common precursor enzyme involved in the biosynthetic pathway of catecholaminergic neurotransmitters, dopamine and norepinephrine. In this investigation, the neuroanatomical distribution of TH-immunoreactivity was studied in the brain of the female mosquitofish Gambusia affinis. Numerous intensely stained TH-immunoreactive (ir) neurons were scattered in the olfactory bulb with their fibres extending towards the medial olfactory tract, whereas few telencephalic TH-ir cells with distinct fibres were observed in the dorsal nucleus of area ventralis telencephali and the posterior nucleus of area ventralis telencephali regions...
May 22, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/28546095/puberty-suppression-in-transgender-children-and-adolescents
#8
REVIEW
Simone Mahfouda, Julia K Moore, Aris Siafarikas, Florian D Zepf, Ashleigh Lin
The World Professional Association for Transgender Health's standards of care recommend suspending puberty, preferably with the use of gonadotropin-releasing hormone agonists, in certain gender non-conforming minors (aged under 18 years) who have undergone a psychiatric assessment and have reached at least Tanner stage II of puberty. This approach seeks to lessen the discordance between assigned natal sex and gender identity by temporarily halting the development of secondary sexual characteristics, essentially widening the temporal window for gender clarification...
May 22, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/28536231/pregnant-with-a-perforated-levonorgestrel-intrauterine-system-and-visible-threads-at-the-cervical-os
#9
David L Howard, Lauren M Beasley
We present a case in which a patient presented with a pregnancy of unknown location and normally rising human chorionic gonadotropin (hCG) levels but with a levonorgestrel intrauterine device (LNG-IUD) present. The LNG-IUD had been placed 4.5 years ago. Although unintended, this pregnancy was desired. Strings were clearly visible and initial 2D ultrasound suggested intrauterine location of the LNG-IUD. The LNG-IUD could not be removed however. The patient was managed expectantly with close follow-up, serial beta-hCGs and serial ultrasounds until definitive diagnosis of the location of the pregnancy...
May 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28534963/n-acetylglucosaminyltransferase-iva-promotes-invasion-of-choriocarcinoma
#10
Kimihiro Nishino, Eiko Yamamoto, Kaoru Niimi, Yoko Sekiya, Yoriko Yamashita, Fumitaka Kikkawa
Gestational trophoblastic neoplasia (GTN) results from the malignant transformation of placental trophoblasts which secrete human chorionic gonadotropin (hCG) as do normal placenta or hydatidiform mole. N-acetylglucosaminyltransferase IV (GnT-IV) is a glycosyltransferase which catalyses the formation of β1,4GlcNAc branches on the mannose core of N-glycans. Previous studies reported that β1,4GlcNAc branches on hCG were detected in GTN but not in normal pregnancy or hydatidiform mole. The aim of the present study was to understand the role of GnT-IVa in choriocarcinoma and find the target proteins for GnT-IVa glycosylation which contribute to the malignancy of choriocarcinoma...
May 23, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28534229/production-of-a-gonadotropin-releasing-hormone-2-receptor-knockdown-gnrhr2-kd-swine-line
#11
A T Desaulniers, R A Cederberg, G A Mills, C A Lents, B R White
Swine are the only livestock species that produce both the second mammalian isoform of gonadotropin-releasing hormone (GNRH2) and its receptor (GNRHR2). Previously, we reported that GNRH2 and GNRHR2 mediate LH-independent testosterone secretion from porcine testes. To further explore this ligand-receptor complex, a pig model with reduced GNRHR2 expression was developed. Small hairpin RNA sequences targeting porcine GNRHR2 were subcloned into a lentiviral-based vector, lentiviral particles were generated and microinjected into the perivitelline space of zygotes, and embryos were transferred into a recipient...
May 22, 2017: Transgenic Research
https://www.readbyqxmd.com/read/28532840/effect-of-breed-plane-of-nutrition-and-age-on-growth-scrotal-development-metabolite-concentrations-and-on-systemic-gonadotropin-and-testosterone-concentrations-following-a-gnrh-challenge-in-young-dairy-bulls
#12
C J Byrne, S Fair, A M English, C Urh, H Sauerwein, M A Crowe, P Lonergan, D A Kenny
The onset of puberty in the bull is regulated by the timing of early GnRH pulsatility release from the hypothalamus, which has been demonstrated to be affected by plane of nutrition during calf-hood. The aim of this study was to determine the effect of plane of nutrition on growth rate, scrotal development, metabolite concentrations and exogenous gonadotrophin (GnRH) induced release of luteinizing hormone (LH), follicle stimulating hormone (FSH) and testosterone (TT) in pre-pubertal bulls of two contrasting dairy breeds...
July 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28529269/possible-role-of-ppar%C3%AE-in-the-negative-regulation-of-ovulatory-cascade-and-luteal-development-in-rats
#13
Ryohei Funahashi, Takanobu Sakamoto, Norihito Taguchi, Ryosuke Naiki, Ryota Terashima, Mitsumori Kawaminami, Shiro Kurusu
Peroxisome proliferator-activated receptor γ (PPARγ), a member of a nuclear receptor family, has been shown to be implicated in various reproductive processes. Here, we evaluated possible roles of PPARγ in ovulation and luteal development in a gonadotropins-primed immature rat model. Immunoreactive PPARγ was expressed in granulosa cells of eCG-stimulated mature follicles, and its expression level decreased following ovulatory hCG stimulus. Intra-bursal treatment with rosiglitazone (a PPARγ agonist) simultaneously with subcutaneously administered hCG blocked the induction of cyclooxygenase-2 and steroidogenic acute regulatory protein (StAR) in preovulatory follicles...
May 19, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28529267/endometrial-adenocarcinoma-with-choriocarcinomatous-differentiation-in-the-uterus-of-a-goat
#14
Masashi Kawashima, Risa Segawa, Toshinori Yoshida, Hirotada Murayama, Rei Nagahara, Masayuki Kimura, Natsumi Endo, Tomomi Tanaka, Makoto Shibutani
An 11-year-old female goat had invasive and metastatic endometrial adenocarcinoma in the uterus. There was a notable proliferation of endometrial epithelial cells in a tubular growth pattern, with a desmoplastic response. The endometrial epithelial tumor cells metastasized to the kidney, liver and lung. In contrast to the primary and metastatic tumor cells, pleomorphic tumor cells with a choriocarcinoma-like growth pattern infiltrated the mesometrium. Cell proliferation activity was high in both types of tumor cells...
May 19, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28528058/metachronous-germ-cell-tumors-of-the-mediastinum
#15
Shuhei Hakiri, Koji Kawaguchi, Takayuki Fukui, Koichi Fukumoto, Shota Nakamura, Kohei Yokoi
We report a rare case of mediastinal nonseminomatous germ cell tumor arising after 2 complete resections of mediastinal mature teratomas 18 and 10 years prior. After three cycles of chemotherapy for the mediastinal nonseminomatous germ cell tumor, the serum α-fetoprotein and β-human chorionic gonadotropin levels were normalized. However, chest radiography revealed that the mediastinal tumor had remarkably increased in size, and thus growing teratoma syndrome was diagnosed. The patient underwent urgent resection of the tumor, and a pathologic examination showed an encapsulated mature teratoma without any malignant viable cells...
June 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28525351/association-study-of-lin28b-in-girls-with-precocious-puberty
#16
Yen-Chun Chen, Li-Min Chen, Hung-Hsun Lin, Bai-Hsiun Chen, Mei-Chyn Chao, Hui-Pin Hsiao
BACKGROUND: Central precocious puberty (CPP), predominant in girls, is defined by early development of secondary sexual characteristics driven by the early secretion of hypothalamic gonadotropin releasing hormone (GnRH) and subsequent gonadotropin. Recent studies have shown variation in the LIN28B gene is associated with timing of puberty, but only a few have show it to be associated with CPP. METHODS: This study attempted to investigate the relation between single-nucleotide polymorphisms (SNPs) in LIN28B and girls with precocious puberty...
May 18, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28525302/treatment-of-endometriosis-associated-pain-with-elagolix-an-oral-gnrh-antagonist
#17
Hugh S Taylor, Linda C Giudice, Bruce A Lessey, Mauricio S Abrao, Jan Kotarski, David F Archer, Michael P Diamond, Eric Surrey, Neil P Johnson, Nelson B Watts, J Chris Gallagher, James A Simon, Bruce Carr, W Paul Dmowski, Nicholas Leyland, Jean P Rowan, W Rachel Duan, Juki Ng, Brittany Schwefel, James W Thomas, Rita I Jain, Kristof Chwalisz
Background Endometriosis is a chronic, estrogen-dependent condition that causes dysmenorrhea and pelvic pain. Elagolix, an oral, nonpeptide, gonadotropin-releasing hormone (GnRH) antagonist, produced partial to nearly full estrogen suppression in previous studies. Methods We performed two similar, double-blind, randomized, 6-month phase 3 trials (Elaris Endometriosis I and II [EM-I and EM-II]) to evaluate the effects of two doses of elagolix - 150 mg once daily (lower-dose group) and 200 mg twice daily (higher-dose group) - as compared with placebo in women with surgically diagnosed endometriosis and moderate or severe endometriosis-associated pain...
May 19, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28523313/correlation-of-clinical-and-biological-evidence-a-dominant-therapeutic-element-of-succeeding-in-ectopic-pregnancy
#18
Simona Daniela NeamŢu, Damian DiŢescu, Maria ForŢofoiu, Liliana Stanca, Cristian Tigae, Mihaela Niculescu, Cristian Ovidiu NeamŢu, Maria Magdalena Manolea, Mirela Anişoara Siminel, Leontina Eugenia Şurtea, Adela Valeria NeamŢu, Marius Bogdan Novac, Liviu Vasile, Adrian Gluhovschi
Tubal pathology, smoking, pelvic inflammatory disease, miscarriage, medical or surgical abortion, usage of intrauterine devices (IUDs) for women with salpingitis latent injuries, older than 40 years, are risk factors for ectopic pregnancy. The objective of this study concerns the correlation of the clinical and biological evidence for the early diagnosis of the ectopic pregnancy and, as soon as possible, for the estimation for eventual risk of complications that may appear. The transvaginal ultrasound test, minimal increases in serum beta-human chorionic gonadotropin (β-hCG) dynamics and blood counts are investigations of choice in achieving our objective...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28523264/erratum-to-raloxifene-administration-in-women-treated-with-long-term-gonadotropin-releasing-hormone-agonist-for-severe-endometriosis-effects-on-bone-mineral-density
#19
Young Hwa Cho, Mi Jung Um, Suk Jin Kim, Soo Ah Kim, Hyuk Jung
[This corrects the article on p. 174 in vol. 22, PMID: 28119898.].
April 2017: Journal of Menopausal Medicine
https://www.readbyqxmd.com/read/28523256/ovarian-volume-in-korean-women-with-polycystic-ovary-syndrome-and-its-related-factors
#20
Young Shin Han, Ah Rha Lee, Hee Kyoung Song, Jeong In Choi, Jang Heub Kim, Mee Ran Kim, Min Jeong Kim
OBJECTIVES: The aim of this study was to determine the relationship of ovarian volume (OV) to age, height, and weight in Korean young women with the polycystic ovary syndrome (PCOS) undergoing ultrasonography (US) and to investigate the relationship between ovarian follicle count and volume on US and serum hormone levels including the levels of the anti-Müllerian hormone (AMH) and gonadotropin. METHODS: A total of 272 Korean nulliparous women aged 15 to 39 years who were newly diagnosed with PCOS at a university hospital were included in this study...
April 2017: Journal of Menopausal Medicine
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