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https://www.readbyqxmd.com/read/29458057/roles-of-the-insulin-signaling-pathway-in-insect-development-and-organ-growth
#1
Xianyu Lin, Guy Smagghe
Organismal development is a complex process as it requires coordination of many aspects to grow into fit individuals, such as the control of body size and organ growth. Therefore, the mechanisms of precise control of growth are essential for ensuring the growth of organisms at a correct body size and proper organ proportions during development. The control of the growth rate and the duration of growth (or the cessation of growth) are required in size control. The insulin signaling pathway and the elements involved are essential in the control of growth...
February 16, 2018: Peptides
https://www.readbyqxmd.com/read/29453925/impact-of-opioid-therapy-on-gonadal-hormones-focus-on-buprenorphine
#2
REVIEW
Anjali Varma, Mamta Sapra, Ali Iranmanesh
Objective The USA is in the midst of an opioid crisis. Understanding the impact of opioids and commonly used treatments for opioid dependence is essential for clinicians and researchers in order to educate and treat the nation's growing population with opioid use disorders. As a relatively new treatment for opioid dependence, buprenorphine is gaining popularity to the extent of becoming not only a preferred approach to the maintenance of opiate addiction, but also an option for chronic pain management. The purpose of this report is to review the available evidence on the endocrine effects of buprenorphine, particularly as it relates to the hypothalamic-pituitary-gonadal (HPG) axis, which is controversial and not fully defined...
February 17, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29453736/reproductive-epidemiology-of-glial-tumors-may-reveal-novel-treatments-high-dose-progestins-or-progesterone-antagonists-as-endocrino-immune-modifiers-against-glioma
#3
REVIEW
Meric A Altinoz, Aysel Ozpinar, Ilhan Elmaci
Female gender, contraceptives, and menopausal hormone replacement treatments containing progesterone analogues associate with higher risk of meningiomas yet with lower risk of gliomas. Progesterone receptor (PR) expression and mifepristone treatment was highly discussed for meningiomas. However, much less is known in regard to progesterone actions in gliomas despite PR expression strongly correlates with their grade. Meningiomas and gliomas may grow faster during gestation; but paradoxically, parousity reduces lifetime risk of gliomas which can be explained with dichotomous cell growth-stimulating and inhibitory actions of progesterone at low versus high levels...
February 17, 2018: Neurosurgical Review
https://www.readbyqxmd.com/read/29453373/dormancy-release-and-germination-of-taxus-yunnanensis-seeds-during-wet-sand-storage
#4
Fangyuan Bian, Jianrong Su, Wande Liu, Shuaifeng Li
Dormancy is an innate constraint on germination that occurs across all life forms. In this study, we investigated the seed dormancy release and germination characters of Taxus yunnanensis by exploring the seed morphology, permeability, germination inhibitors, endogenous hormones, and embryo germination in vitro during wet sand storage. Our results showed that seeds and embryos grew to a critical size to germination and permeability increased with the extension of storage. Seed coat and kernel methanol extracts reduced Brassica campestris seed vigor index...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29451618/the-association-of-vitamin-d-levels-and-the-frailty-phenotype-among-non-geriatric-dialysis-patients-a-cross-sectional-study
#5
Demet Tekdos Demircioglu
OBJECTIVES: The aim of this study was to investigate the frequency of frailty and the association of vitamin D levels and the frailty phenotype among non-geriatric dialysis patients. METHOD: Seventy-four stable, chronic hemodialysis patients from the hemodialysis unit of the hospital were enrolled in the study. The patients' medical histories and laboratory findings were obtained from the medical records of the dialysis unit. Serum parathyroid hormone and 25-hydroxy vitamin D levels were determined using chemiluminometric immunoassays...
2018: Clinics
https://www.readbyqxmd.com/read/29451419/physical-exercise-nutrition-and-hormones-three-pillars-to-fight-sarcopenia
#6
Paolo Sgrò, Massimiliano Sansone, Andrea Sansone, Stefania Sabatini, Paolo Borrione, Francesco Romanelli, Luigi Di Luigi
BACKGROUND: Sarcopenia is a pathophysiological condition diffused in elderly people; it represents a social issue due to the longer life expectancy and the growing aging population. It affects negatively quality of life and it represents a risk factor for other pathologies, such as diabetes, cardiovascular disease, and obesity. No silver bullet exists to hinder sarcopenia, but it may be counteracted by physical exercise, nutrition, and a proper endocrine milieu. Indeed, we aim to analyze the scientific literature to give to clinician effective advices to counteract sarcopenia...
February 16, 2018: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/29447216/genome-mining-of-streptomyces-scabrisporus-nf3-reveals-symbiotic-features-including-genes-related-to-plant-interactions
#7
Corina Diana Ceapă, Melissa Vázquez-Hernández, Stefany Daniela Rodríguez-Luna, Angélica Patricia Cruz Vázquez, Verónica Jiménez Suárez, Romina Rodríguez-Sanoja, Elena R Alvarez-Buylla, Sergio Sánchez
Endophytic bacteria are wide-spread and associated with plant physiological benefits, yet their genomes and secondary metabolites remain largely unidentified. In this study, we explored the genome of the endophyte Streptomyces scabrisporus NF3 for discovery of potential novel molecules as well as genes and metabolites involved in host interactions. The complete genomes of seven Streptomyces and three other more distantly related bacteria were used to define the functional landscape of this unique microbe. The S...
2018: PloS One
https://www.readbyqxmd.com/read/29443645/hair-and-salivary-testosterone-hair-cortisol-and-externalizing-behaviors-in-adolescents
#8
Andrew D Grotzinger, Frank D Mann, Megan W Patterson, Jennifer L Tackett, Elliot M Tucker-Drob, K Paige Harden
Although testosterone is associated with aggression in the popular imagination, previous research on the links between testosterone and human aggression has been inconsistent. This inconsistency might be because testosterone's effects on aggression depend on other moderators. In a large adolescent sample ( N = 984, of whom 460 provided hair samples), we examined associations between aggression and salivary testosterone, hair testosterone, and hair cortisol. Callous-unemotional traits, parental monitoring, and peer environment were examined as potential moderators of hormone-behavior associations...
February 1, 2018: Psychological Science
https://www.readbyqxmd.com/read/29439134/self-organizing-periodicity-in-development-organ-positioning-in-plants
#9
REVIEW
Neha Bhatia, Marcus G Heisler
Periodic patterns during development often occur spontaneously through a process of self-organization. While reaction-diffusion mechanisms are often invoked, other types of mechanisms that involve cell-cell interactions and mechanical buckling have also been identified. Phyllotaxis, or the positioning of plant organs, has emerged as an excellent model system to study the self-organization of periodic patterns. At the macro scale, the regular spacing of organs on the growing plant shoot gives rise to the typical spiral and whorled arrangements of plant organs found in nature...
February 8, 2018: Development
https://www.readbyqxmd.com/read/29438534/both-in-vivo-fsh-depletion-and-follicular-exposure-to-gonadotrophin-releasing-hormone-analogues-in-vitro-are-not-effective-to-prevent-follicular-depletion-during-chemotherapy-in-mice
#10
F Horicks, G Van Den Steen, C Gervy, H J Clarke, I Demeestere
STUDY QUESTION: Does fertility preservation using gonadotrophin-releasing hormone (GnRH) analogues during chemotherapy act through a direct effect on the ovary or through inhibition of FSH secretion? SUMMARY ANSWER: The absence of FSH in vivo and the direct exposition of ovarian follicles to GnRH analogues in vitro did not prevent chemotherapy-induced ovarian damage. WHAT IS KNOWN ALREADY: The potential mechanisms of action of GnRH analogues in protecting ovaries against chemotherapy damage remain poorly understood...
February 9, 2018: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29438034/c1qtnf3-in-the-murine-ovary-and-its-function-in-folliculogenesis
#11
Zhoufei Mao, Liuhong Yang, Xiaosheng Lu, Anni Tan, Yuxia Wang, Fei Ding, Luanjuan Xiao, Xufeng Qi, Yanhong Yu
C1q/tumor necrosis factor-related protein 3 (C1QTNF3) is a novel adipokine with modulating effects on metabolism, inflammation, and the cardiovascular system. C1QTNF3 expression levels in the sera and omental adipose tissues of women with PCOS are low compared to control subjects. However, the expression and function of C1QTNF3 in the ovary has not previously been examined. Here, we assessed the expression patterns of C1qtnf3 in the ovary and explored its role in folliculogenesis. The C1qtnf3 transcript abundance was higher in large follicles than in small follicles and was under the influence of gonadotropin...
February 1, 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29434673/practical-differences-between-luteinizing-hormone-releasing-hormone-agonists-in-prostate-cancer-perspectives-across-the-spectrum-of-care
#12
REVIEW
Davide Meani, Mladen Solarić, Harri Visapää, Rose-Marie Rosén, Robert Janknegt, Majana Soče
Background: Androgen deprivation therapy (ADT) with luteinizing hormone-releasing hormone (LHRH) agonists is well established for the treatment of men with metastatic prostate cancer. As clear differences in efficacy, safety, or tolerability between the available LHRH agonists are lacking, the healthcare management team needs to look to practical differences between the formulations when selecting therapy for their patients. Moreover, as the economic burden of prostate cancer rises alongside earlier diagnosis and improved survival, the possibility for cost savings by using products with specific features is growing in importance...
February 2018: Therapeutic Advances in Urology
https://www.readbyqxmd.com/read/29433595/management-practices-associated-with-reproductive-performance-in-holstein-cows-on-large-commercial-dairy-farms
#13
I Fodor, Zs Abonyi-Tóth, L Ózsvári
As a result of the increase in herd size and the intensification of production, the complexity of reproductive management has been growing in dairy herds. The aim of our study was to examine the associations of management practices and reproductive performance in Holstein cows on large commercial dairy farms. Management practices applied to cows were surveyed between 22 May and 6 November 2015 in 34 large Holstein-Friesian dairy herds in Hungary. Individual data of 23 784 cows that calved between 1 January 2014 and 31 December 2014 in the surveyed herds were gathered...
February 13, 2018: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29428703/the-contribution-of-total-and-free-iodothyronines-to-welfare-maintenance-and-management-stress-coping-in-ruminants-and-equines-physiological-ranges-and-reference-values
#14
REVIEW
Adriana Ferlazzo, Cristina Cravana, Esterina Fazio, Pietro Medica
In order to acquire a pattern of thyroid involvement in welfare maintenance in Ruminants and Equines, this review summarizes data concerning the reference values of total and free iodothyronines and their modifications in physiological conditions and in different management conditions (pregnancy, lactation, weaning, growth, isolation, restraint, shearing, confinement and transportation). Thyroidal and extrathyroidal tissues efficiently respond to management practices, giving a differentiated contribution to circulating iodothyronine changes...
February 2, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29427807/isolation-and-culture-of-chicken-growing-follicles-in-2-and-3-dimensional-models
#15
Dan Zhao, Imdad Hussain Leghari, Jian Li, Yuling Mi, Caiqiao Zhang
The isolation and culture of ovarian follicles is essential for the studies of follicular development and function. In contrast to the relative ease of culture for mammalian follicles, developing in vitro cultures of high viability for the much larger avian follicles has always proven to be more challenging. In this study, the growing follicles from domestic hens (Gallus domesticus) were isolated using enzymatic and mechanical methods and then investigated for the optimized conditions for culture. Assessments of viability and hormonal responsiveness were also considered...
February 2, 2018: Theriogenology
https://www.readbyqxmd.com/read/29427549/linking-type-2-diabetes-and-gynecological-cancer-an-introductory-overview
#16
REVIEW
Emanuela Anastasi, Tiziana Filardi, Sara Tartaglione, Andrea Lenzi, Antonio Angeloni, Susanna Morano
Type 2 diabetes (T2D) is a chronic disease with a growing prevalence and a leading cause of death in many countries. Several epidemiological studies observed an association between T2D and increased risk of many types of cancer, such as gynecologic neoplasms (endometrial, cervical, ovarian and vulvar cancer). Insulin resistance, chronic inflammation and high free ovarian steroid hormones are considered the possible mechanisms behind this complex relationship. A higher risk of endometrial cancer was observed in T2D, even though this association largely attenuated after adjusting for obesity...
February 10, 2018: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/29422312/altered-expression-of-anti-m%C3%A3-llerian-hormone-during-the-early-stage-of-bovine-persistent-ovarian-follicles
#17
P U Díaz, F Rey, N C Gareis, U S Notaro, V Matiller, E M Belotti, A F Stassi, N R Salvetti, H H Ortega
Anti-Müllerian hormone (AMH) is a homodimeric glycoprotein expressed exclusively in the gonads. This hormone is an important regulator of the early growth of follicles through inhibitory effects on the recruitment of primordial follicles into the pool of growing follicles and on granulosa cell proliferation. Cystic ovarian disease (COD) is an important disorder affecting the fertility of dairy cattle. In the present study, we evaluated the expression of AMH in granulosa cells and AMH secretion into follicular fluid in pre-ovulatory follicles from control cows, animals with spontaneously arising COD and during the development of the disease, at 5, 10 and 15 days of follicular persistence...
January 2018: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/29421651/an-update-on-oxysterol-biochemistry-new-discoveries-in-lipidomics
#18
William J Griffiths, Yuqin Wang
Oxysterols are oxidised derivatives of cholesterol or its precursors post lanosterol. They are intermediates in the biosynthesis of bile acids, steroid hormones and 1,25-dihydroxyvitamin D3. Although often considered as metabolic intermediates there is a growing body of evidence that many oxysterols are bioactive and their absence or excess may be part of the cause of a disease phenotype. Using global lipidomics approaches oxysterols are underrepresented encouraging the development of targeted approaches. In this article, we discuss recent discoveries important in oxysterol biochemistry and some of the targeted lipidomic approaches used to make these discoveries...
February 5, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29421437/effects-of-acupuncture-on-the-levels-of-serum-estradiol-and-pituitary-estrogen-receptor-beta-in-a-rat-model-of-induced-super-ovulation
#19
Haiyang Fu, Jianhua Sun, Yong Tan, Huifang Zhou, Wanli Xu, Junling Zhou, Dong Chen, Cong Zhang, Xuanxuan Zhu, Ying Zhang, Xiaoliang Wu, Zhaoqing Xi
AIMS: Acupuncture is frequently recommended as a complementary therapy for infertility. However, whether acupuncture can prevent early ovarian hyperstimulation syndrome has not been examined and its potential mechanisms are not well understood. MAIN METHODS: Forty rats were randomized into four groups: Control, Ovarian Stimulation Model, Acupuncture, and Human Chorionic Gonadotropin (HCG). Serum estradiol, progesterone, testosterone, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels were measured by enzyme-linked immunosorbent assay...
February 5, 2018: Life Sciences
https://www.readbyqxmd.com/read/29416938/complete-response-in-advanced-breast-cancer-patient-treated-with-a-combination-of-capecitabine-oral-vinorelbine-and-dasatinib
#20
V Sgroi, M Bassanelli, M Roberto, E Iannicelli, R Porrini, P Pellegrini, A Tafuri, P Marchetti
Background: Currently, there are no data available on the best choice of treatment in heavily pretreated patients with advanced breast cancer. However, the combination of oral vinorelbine and capecitabine has been demonstrated to be effective and safe in patients with advanced breast cancer pretreated with anthracycline. Furthermore, some studies assessed the activity of dasatinib, an oral tyrosine kinase inhibitor that inhibits five oncogenic tyrosine kinase families, alone or in combination with different chemotherapy in patients affected with advanced breast cancer...
2018: Experimental Hematology & Oncology
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