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https://www.readbyqxmd.com/read/29165733/impact-of-type-of-sport-gender-and-age-on-red-blood-cell-deformability-of-elite-athletes
#1
Fabian Tomschi, Wilhelm Bloch, Marijke Grau
Our objective was to detect possible differences in red blood cell (RBC) deformability of elite athletes performing different types of sports and being of different age and gender.182 athletes were included in this cross-sectional study. RBC deformability was measured using the laser-assisted optical rotational cell-analyzer. Maximal elongation index (EI max) and shear stress at half-maximum deformation (SS 1/2) were calculated. The ratio SS 1/2 /EI max (EI Ratio) was calculated with low values representing high RBC deformation...
November 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29165663/oral-contraceptives-and-cigarette-smoking-a-review-of-the-literature-and-future-directions
#2
Alicia M Allen, Andrea H Weinberger, Reagan R Wetherill, Carol L Howe, Sherry A McKee
Introduction: Evidence continues to mount indicating that endogenous sex hormones (e.g., progesterone and estradiol) play a significant role in smoking-related outcomes. Although approximately 1 out of 4 premenopausal smokers use oral contraceptives (OCs), which significantly alter progesterone and estradiol levels, relatively little is known about how OCs may influence smoking-related outcomes. Thus, the goal of this review paper is to describe the state of the literature and offer recommendations for future directions...
November 18, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/29165635/breast-development-in-transwomen-after-one-year-of-cross-sex-hormone-therapy-results-of-a-prospective-multicenter-study
#3
Christel Josefa Maria de Blok, Maartje Klaver, Chantal Maria Wiepjes, Nienke Marije Nota, Annemieke Corine Heijboer, Alessandra Daphne Fisher, Thomas Schreiner, Guy T'Sjoen, Martin den Heijer
Context: Breast development is a key feature of feminization and therefore important to transwomen (male-to-female transgender persons). However, it is not exactly known when breast development starts after initiating cross-sex hormone therapy (CHT) and how much growth may be expected of CHT alone. Objective: To investigate breast development in centimeters and bra cup-sizes in transwomen during their first year of CHT, and whether clinical or laboratory parameters predict the breast development...
November 20, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29165628/sex-differences-in-20-hydroxyecdysone-hormone-levels-control-sexual-dimorphism-in-bicyclus-anynana-wing-patterns
#4
S Bhardwaj, K L Prudic, A Bear, M D Gupta, B R Wasik, X Tong, W F Cheong, M R Wenk, A Monteiro
In contrast to the important role of hormones in the development of sexual traits in vertebrates (Cox, et al. 2009), the differentiation of these traits in insects is attributed almost exclusively to cell-autonomous mechanisms controlled by members of the sex determination pathway (Verhulst and van de Zande 2015), such as doublesex (dsx). Although hormones can shape the development of sexual traits in insects, variation in hormone levels are not conclusively known to cause dimorphism in these traits (Prakash and Monteiro 2016)...
November 20, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29165002/adrenal-dependent-and-independent-stress-induced-per1-mrna-in-hypothalamic-paraventricular-nucleus-and-prefrontal-cortex-of-male-and-female-rats
#5
Lauren E Chun, Jenny Christensen, Elizabeth R Woodruff, Sarah J Morton, Laura R Hinds, Robert L Spencer
Oscillating clock gene expression gives rise to a molecular clock that is present not only in the body's master circadian pacemaker, the hypothalamic suprachiasmatic nucleus (SCN), but also in extra-SCN brain regions. These extra-SCN molecular clocks depend on the SCN for entrainment to a light:dark cycle. The SCN has limited neural efferents, so it may entrain extra-SCN molecular clocks through its well-established circadian control of glucocorticoid hormone secretion. Glucocorticoids can regulate the normal rhythmic expression of clock genes in some extra-SCN tissues...
November 22, 2017: Stress: the International Journal on the Biology of Stress
https://www.readbyqxmd.com/read/29164590/the-effect-of-abdominal-obesity-in-patients-with-polycystic-ovary-syndrome-on-metabolic-parameters
#6
G Franik, A Bizoń, S Włoch, D Pluta, Ł Blukacz, H Milnerowicz, P Madej
OBJECTIVE: Polycystic ovarian syndrome and obesity contribute to the metabolic complications for women of reproductive age. The aim of present study was to analyze the effect of abdominal obesity expressed using waist/hip ratio (WHR) in patients with polycystic ovary syndrome on metabolic parameters. PATIENTS AND METHODS: The study included 659 women with PCOS with WHR <0.8 and ≥0.8 aged between 17 and 44 years. Patients were tested for follicular stimulating hormone, luteinizing hormone, 17-beta-estradiol, dehydroepiandrosterone sulfate, androstenedione, sex hormone binding globulin, and total lipid profile during the follicular phase (within 3 and 5 days of their menstrual cycle)...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29164514/high-urinary-iodine-thyroid-autoantibodies-and-thyroid-stimulating-hormone-for-papillary-thyroid-cancer-risk
#7
Hengqiang Zhao, Hehe Li, Tao Huang
Thyroid nodules have become a common clinical problem, and the clinical importance of thyroid nodules lies in the determination of thyroid cancer. This study aims to evaluate the risk factors for papillary thyroid cancer (PTC) with regard to urinary iodine concentration (UIC), thyroid-stimulating hormone (TSH), thyroid peroxidase antibody (TPOAb), and thyroglobulin antibody (TGAb) in comparison to thyroid nodular goiter (NG). Among the 2041 patients, 43.8% of which showed more than adequate (UIC 200-299 μg/L) and excessive iodine (UIC ≥ 300...
November 21, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29164510/4-year-changes-in-sex-hormones-sexual-functioning-and-psychosocial-status-in-women-who-underwent-bariatric-surgery
#8
David B Sarwer, Thomas A Wadden, Jacqueline C Spitzer, James E Mitchell, Kathy Lancaster, Anita Courcoulas, William Gourash, Raymond C Rosen, Nicholas J Christian
BACKGROUND: Initial weight loss after bariatric surgery has been associated with improvements in reproductive hormones and sexual functioning in women. Few studies have investigated the durability of these changes. OBJECTIVES: The objective of this paper is to investigate changes in sex hormones, sexual functioning, and relevant psychosocial constructs over 4 years in women who underwent bariatric surgery. SETTING: The setting is a prospective cohort of 106 women from the Longitudinal Assessment of Bariatric Surgery consortium...
November 21, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29164377/systemic-and-local-effects-of-vaginal-dehydroepiandrosterone-dhea-ncctg-n10c1-alliance
#9
Debra L Barton, Lynne T Shuster, Travis Dockter, Pamela J Atherton, Jacqueline Thielen, Stephen N Birrell, Richa Sood, Patricia Griffin, Shelby A Terstriep, Bassam Mattar, Jacqueline M Lafky, Charles L Loprinzi
BACKGROUND: Dehydroepiandrosterone (DHEA) is helpful for treating vaginal symptoms. This secondary analysis evaluated the impact of vaginal DHEA on hormone concentrations, bone turnover, and vaginal cytology in women with a cancer history. METHODS: Postmenopausal women, diagnosed with breast or gynecologic cancer, were eligible if they reported at least moderate vaginal symptoms. Participants could be on tamoxifen or aromatase inhibitors (AIs). Women were randomized to 3...
November 21, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/29164314/cross-national-gender-variations-of-digit-ratio-2d-4d-correlate-with-life-expectancy-suicide-rate-and-other-causes-of-death
#10
Bernd Lenz, Johannes Kornhuber
The second-to-fourth finger length ratio (2D:4D) is an indication of prenatal sex hormone exposure, and has sex-specifically been associated with several lethal illnesses including ischemic heart disease, diverse cancers, and suicide. Our primary aim was to verify that 2D:4D sex-specifically relates to life expectancy and suicide numbers on a national level (23 countries). We also used a hypothesis-free approach to investigate associations with other causes of death [p value adjustment for multiple hypothesis testing using the false discovery rate procedure (FDR)]...
November 21, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29163084/sex-matters-robust-sex-differences-in-signal-detection-in-the-hiv-1-transgenic-rat
#11
Kristen A McLaurin, Rosemarie M Booze, Charles F Mactutus, Amanda J Fairchild
Sex differences in human immunodeficiency virus type-1 (HIV-1) have been repeatedly suggested. Females, who account for 51% of HIV-1 seropositive individuals, are inadequately represented in clinical and preclinical studies, as well as in the description of HIV-1 associated neurocognitive disorders (HAND). Direct comparisons of neurocognitive decline in women and men must be made to address this underrepresentation. The effect of biological sex (i.e., the biological factors, including chromosomes and hormones, determining male or female characteristics; WHO, 2017) on sustained attention, which is commonly impaired in HIV-1 seropositive individuals, was investigated in intact HIV-1 transgenic (Tg) and control animals using a signal detection operant task...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29162647/a-unifying-biology-of-sex-steroid-induced-apoptosis-in-prostate-and-breast-cancers
#12
Philipp Y Maximov, Balkees Abderrahman, Ramona F Curpan, Yousef A Hawsawi, Ping Fan, V Craig Jordan
Prostate and breast cancer are the two cancers with the highest incidence in men and women, respectively. Here we focus on the known biology of acquired resistance to antihormone therapy of prostate and breast cancer and compare laboratory and clinical similarities in the evolution of the disease. Laboratory studies and clinical observations in prostate and breast cancer demonstrate that cell selection pathways occur during acquired resistance to antihormonal therapy. Following sex steroid deprivation, both prostate and breast cancer models show an initial increased acquired sensitivity to the growth potential of sex steroids...
November 21, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/29162577/cohort-profile-the-mayo-clinic-cohort-study-of-oophorectomy-and-aging-2-moa-2-in-olmsted-county-minnesota-usa
#13
Walter A Rocca, Liliana Gazzuola Rocca, Carin Y Smith, Brandon R Grossardt, Stephanie S Faubion, Lynne T Shuster, Elizabeth A Stewart, Michelle M Mielke, Kejal Kantarci, Virginia M Miller
PURPOSE: This cohort study was established to investigate the effects of unilateral and bilateral oophorectomy on the ageing processes in women. PARTICIPANTS: We used the records-linkage system of the Rochester Epidemiology Project (REP, http://www.rochesterproject.org) to identify 570 women who underwent unilateral oophorectomy and 1653 women who underwent bilateral oophorectomy in Olmsted County, Minnesota from 1988 through 2007 (20 years). Each woman was matched by age (±1 year) to a population-based referent woman who had not undergone any oophorectomy (570 referent women) or bilateral oophorectomy (1653 referent women)...
November 20, 2017: BMJ Open
https://www.readbyqxmd.com/read/29162485/expression-and-regulation-of-cyp17a1-and-3%C3%AE-hydroxysteroid-dehydrogenase-in-cells-of-the-nervous-system-potential-effects-of-vitamin-d-on-brain-steroidogenesis
#14
Ida Emanuelsson, Mokhtar Almokhtar, Kjell Wikvall, Alfhild Grönbladh, Erik Nylander, Anne-Lie Svensson, Åsa Fex Svenningsen, Maria Norlin
Steroids are reported to have diverse functions in the nervous system. Enzymatic production of steroid hormones has been reported in different cell types, including astrocytes and neurons. However, the information on some of the steroidogenic enzymes involved is insufficient in many respects. Contradictory results have been reported concerning the relative importance of different cell types in the nervous system for expression of CYP17A1 and 3β-hydroxysteroid dehydrogenase (3β-HSD). 3β-HSD is important in all basic steroidogenic pathways and CYP17A1 is required to form sex hormones...
November 18, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/29162152/the-peptidylglycine-%C3%AE-amidating-monooxygenase-pam-gene-rs13175330-a-g-polymorphism-is-associated-with-hypertension-in-a-korean-population
#15
Hye Jin Yoo, Minjoo Kim, Minkyung Kim, Jey Sook Chae, Sang-Hyun Lee, Jong Ho Lee
BACKGROUND: Peptidylglycine-α-amidating monooxygenase (PAM) may play a role in the secretion of atrial natriuretic peptide (ANP), which is a hormone involved in the maintenance of blood pressure (BP). The objective of the present study was to determine whether PAM is a novel candidate gene for hypertension (HTN). RESULTS: A total of 2153 Korean participants with normotension and HTN were included. Genotype data were obtained using the Korean Chip. The rs13175330 polymorphism of the PAM gene was selected from the ten single nucleotide polymorphisms (SNPs) most strongly associated with BP...
November 21, 2017: Human Genomics
https://www.readbyqxmd.com/read/29161770/twin-models-of-environmental-and-genetic-influences-on-pubertal-development-salivary-testosterone-and-estradiol-in-adolescence
#16
Andrew D Grotzinger, Frank D Mann, Megan W Patterson, Kathrin Herzhoff, Jennifer L Tackett, Elliot M Tucker-Drob, K Paige Harden
OBJECTIVE: Research on sources of variation in adolescent's gonadal hormone levels is limited. We sought to decompose individual differences in adolescent testosterone, estradiol and pubertal status, into genetic and environmental components. DESIGN: A sample of male and female adolescent twins from the greater Austin and Houston areas provided salivary samples, with a subset of participants providing longitudinal data at two waves. PARTICIPANTS: The sample included 902 adolescent twins, 49% female, ages 13-20 years (M = 15...
November 21, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/29160416/agonistic-activity-of-tamoxifen-a-selective-estrogen-receptor-modulator-serm-on-arthritic-ovariectomized-mice
#17
L A S Silva, F B Felix, J M D Araujo, E V Souza, E A Camargo, R Grespan
Arthritis is positively associated with the decline of sex hormones, especially estrogen. Tamoxifen (TMX) is a selective estrogen receptor modulator, possessing agonist or antagonistic activity in different tissues. Thus, the objective of this study was to investigate the effect of TMX on the zymosan-induced arthritis model. Female Swiss normal and ovariectomized (OVX) mice were divided into groups and treated for five days with TMX (0.3, 0.9 or 2.7 mg/kg) or 17-β-estradiol (E2, 50 µg/kg). On the fifth day, arthritis was induced and 4 h later, leukocyte migration into joint cavities was evaluated...
November 13, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29158735/correlation-between-insulin-resistance-and-thyroid-nodule-in-type-2-diabetes-mellitus
#18
Yunzhao Tang, Tiantian Yan, Gang Wang, Yijun Chen, Yanjuan Zhu, Zhenhuan Jiang, Min Yang, Chenguang Li, Zhu Li, Ping Yu, Shanshan Wang, Nannan Zhu, Qiuyue Ren, Changlin Ni
Objective: The present study explored the association between insulin resistance (IR) and the clinical characteristics of thyroid nodules in patients with type 2 diabetes mellitus (T2DM). Methods: All the patients were newly diagnosed with T2DM. 201 patients with thyroid nodule disease and 308 patients without the nodular thyroid disease. The participants were evaluated by relevant examination. Correlation analyses and regression analyses were performed to examine the relationships between the two groups...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/29158535/the-triglycerides-and-glucose-index-rather-than-homa-ir-is-more-associated-with-hypogonadism-in-chinese-men
#19
Kun Zhang, Yi Chen, Lijie Liu, Meng Lu, Jing Cheng, Fengbin Gao, Ningjian Wang, Zhoujun Shen, Yingli Lu
Previous studies have reported that insulin resistant and low testosterone are related. The triglyceride and glucose index (TyG) well mirrors insulin sensitivity. No study investigated the application of TyG in male hypogonadism. We aimed to explore whether TyG was associated with hypogonadism, and also evaluate the ability of TyG compared to HOMA-IR as a possible hypogonadism predictor. A total of 4299 male subjects were enrolled from 22 sites in East China. Hypogonadism was defined as total testosterone <11...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29156872/plasma-human-leukocyte-antigen-g-hla-g-in-patients-with-thyroid-cancer
#20
Murat Akın, Latife Arzu Aral, Aydın Yavuz, Harun Karabacak, Kürşat Dikmen, Hasan Bostancı
Background/aim: A number of tumor markers detected in the serum or pathological specimens using immunohistochemical methods are used for early detection of malignancies and postoperative follow-up. Human leukocyte antigen-G (HLA-G) is a nonclassic HLA class I molecule. Recent studies suggested a relationship between HLA-G positivity and the stage or the phenotype of the malignancy. In this study, the relationship between serum HLA-G positivity and thyroid cancer was investigated. Materials and methods: Fifty patients with thyroid cancer and 45 healthy volunteers were included in this study...
August 23, 2017: Turkish Journal of Medical Sciences
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