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obesity genetics

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https://www.readbyqxmd.com/read/29684791/the-role-of-promyelocytic-leukemia-protein-in-steatosis-associated-hepatic-tumors-related-to-chronic-hepatitis-b-virus-infection
#1
Yih-Lin Chung, Mei-Ling Wu
The persistence of hepatitis B surface antigen (HBsAg) is a risk factor for the development of steatosis-associated tumors in chronic hepatitis B virus (HBV) infection, yet little is known about the metabolic link with this factor. We correlated HBV-related pathogenesis in genetically engineered mice and human carriers with metabolic proteomics and lipogenic gene expression profiles. The immunohistochemistry showed that the promyelocytic leukemia protein (PML, a tumor suppressor involved in genome maintenance and fatty acid oxidation), being inversely influenced by the dynamic HBsAg levels from acute phase to seroclearance, appeared as a lipo-metabolic switch linking HBsAg-induced steatosis (lipogenesis) to HBsAg-lost fat-burning hepatocarcinogenesis (lipolysis)...
April 20, 2018: Translational Oncology
https://www.readbyqxmd.com/read/29681103/comparison-of-perinatal-factors-in-deletion-versus-uniparental-disomy-in-prader-willi-syndrome
#2
June-Anne Gold, Ranim Mahmoud, Suzanne B Cassidy, Virginia Kimonis
Prader-Willi syndrome (PWS) is caused by a deficiency of imprinted genes in the 15q11-q13 region and is characterized by prenatal onset of hypotonia, poor feeding, childhood-onset obesity, hyperphagia, short stature, facial dysmorphism, intellectual disability, and behavioral problems. We studied perinatal factors in a cohort of 64 people with PWS resulting from paternal deletion of 15q11-q13 and maternal uniparental disomy (UPD) for chromosome 15. We recruited 34 individuals with deletion and 30 with UPD. We compared the frequency of multiple prenatal and neonatal factors with the general population as well as between the two genetic subtypes...
May 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29679742/adaptive-thermogenesis-by-dietary-n-3-polyunsaturated-fatty-acids-emerging-evidence-and-mechanisms
#3
REVIEW
Rong Fan, Karsten Koehler, Soonkyu Chung
Brown/beige fat plays a crucial role in maintaining energy homeostasis through non-shivering thermogenesis in response to cold temperature and excess nutrition (adaptive thermogenesis). Although numerous molecular and genetic regulators have been identified, relatively little information is available regarding thermogenic dietary molecules. Recently, a growing body of evidence suggests that high consumption of n-3 polyunsaturated fatty acids (PUFA) or activation of GPR120, a membrane receptor of n-3 PUFA, stimulate adaptive thermogenesis...
April 18, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29679049/individual-and-shared-effects-of-social-environment-and-polygenic-risk-scores-on-adolescent-body-mass-index
#4
Jonathan R I Coleman, Eva Krapohl, Thalia C Eley, Gerome Breen
Juvenile obesity is associated with adverse health outcomes. Understanding genetic and environmental influences on body mass index (BMI) during adolescence could inform interventions. We investigated independent and interactive effects of parenting, socioeconomic status (SES) and polygenic risk on BMI pre-adolescence, and on the rate of change in BMI across adolescence. Genome-wide genotype data, BMI and child perceptions of parental warmth and punitive discipline were available at 11 years old, and parental SES was available from birth on 3,414 unrelated participants...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29678289/pathophysiology-of-melanocortin-receptors-and-their-accessory-proteins
#5
REVIEW
T V Novoselova, L F Chan, A J L Clark
The melanocortin receptors (MCRs) and their accessory proteins (MRAPs) are involved in regulation of a diverse range of endocrine pathways. Genetic variants of these components result in phenotypic variation and disease. The MC1R is expressed in skin and variants in the MC1R gene are associated with ginger hair color. The MC2R mediates the action of ACTH in the adrenal gland to stimulate glucocorticoid production and MC2R mutations result in familial glucocorticoid deficiency (FGD). MC3R and MC4R are involved in metabolic regulation and their gene variants are associated with severe pediatric obesity, whereas the function of MC5R remains to be fully elucidated...
April 2018: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29676541/primary-cilia-as-a-signaling-platform-for-control-of-energy-metabolism
#6
REVIEW
Do Kyeong Song, Jong Han Choi, Min Seon Kim
Obesity has become a common healthcare problem worldwide. Cilia are tiny hair-like organelles on the cell surface that are generated and anchored by the basal body. Non-motile primary cilia have been considered to be evolutionary rudiments until a few decades, but they are now considered as important signaling organelles because many receptors, channels, and signaling molecules are highly expressed in primary cilia. A potential role of primary cilia in metabolic regulation and body weight maintenance has been suspected based on rare genetic disorders termed as ciliopathy, such as Bardet-Biedl syndrome and Alström syndrome, which manifest as obesity...
April 2018: Diabetes & Metabolism Journal
https://www.readbyqxmd.com/read/29675043/cardiovascular-risk-factors-after-childhood-cancer-treatment-are-independent-of-the-fto-gene-polymorphism
#7
Małgorzata Sawicka-Żukowska, Maryna Krawczuk-Rybak, Paweł Bernatowicz, Katarzyna Muszyńska-Rosłan, Jerzy Konstantynowicz, Włodzimierz Łuczyński
The study objective was to assess the prevalence of cardiovascular disease risk factors in patients treated for childhood cancer ( N = 101) and to determine the involvement of clinical (cancer type and therapy) and/or genetic ( FTO gene rs9939609 polymorphism) factors. Anthropometric features, laboratory findings, and standardized osteodensitometric indices (fat and lean mass) were considered. Overweight/obesity was found in 17.82% of the patients; however, central adiposity was found in as many as 42.5%. At least one abnormality in lipid metabolism was observed in 35...
2018: International Journal of Endocrinology
https://www.readbyqxmd.com/read/29674968/peripherally-administered-y-2-receptor-antagonist-biie0246-prevents-diet-induced-obesity-in-mice-with-excess-neuropeptide-y-but-enhances-obesity-in-control-mice
#8
Liisa Ailanen, Laura H Vähätalo, Henriikka Salomäki-Myftari, Satu Mäkelä, Wendy Orpana, Suvi T Ruohonen, Eriika Savontaus
Neuropeptide Y (NPY) plays an important role in the regulation of energy homeostasis in the level of central and sympathetic nervous systems (SNSs). Genetic silencing of peripheral Y2 -receptors have anti-obesity effects, but it is not known whether pharmacological blocking of peripheral Y2 -receptors would similarly benefit energy homeostasis. The effects of a peripherally administered Y2 -receptor antagonist were studied in healthy and energy-rich conditions with or without excess NPY. Genetically obese mice overexpressing NPY in brain noradrenergic nerves and SNS (OE-NPYDβH ) represented the situation of elevated NPY levels, while wildtype (WT) mice represented the normal NPY levels...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29674502/dissecting-the-pathophysiology-of-immune-thrombotic-thrombocytopenic-purpura-interplay-between-genes-and-environmental-triggers
#9
Johana Hrdinová, Silvia D'Angelo, Nuno A G Graça, Bogac Ercig, Karen Vanhoorelbeke, Agnès Veyradier, Jan Voorberg, Paul Coppo
Although outstanding progress has been made in comprehending the pathophysiology of thrombotic thrombocytopenic purpura, our understanding of the immunopathogenesis of the disease is only in its earlier stage. Anti-ADAMTS13 auto-antibodies were shown to block proteolysis of von Willebrand factor and/or induce ADAMTS13 clearance from the circulation. However, which immune cells are involved in the production of anti-ADAMTS13 autoantibodies and hence account for the remarkable efficacy of the B-cell depleting agents in this disease, remain to be identified...
April 19, 2018: Haematologica
https://www.readbyqxmd.com/read/29673929/sleep-disorders-in-adolescents-and-young-adults-insights-into-types-relationship-to-obesity-and-high-altitude-and-possible-lines-of-management
#10
REVIEW
Ahmed M Kabel, Amani M Al Thumali, Khayriah A Aldowiala, Raghad D Habib, Shoroq S Aljuaid, Huda A Alharthi
A sleep disorder is a medical disorder of the sleep pattern of a person that may be serious enough to interfere with normal physical, mental and emotional functioning. Disruptions in sleep can be caused by a variety of causes, from teeth grinding to night terrors. Sleep disorders are usually prevalent among adolescents and young adults, possibly due to factors related to life style, dietary habits, hormonal and emotional disturbances. Other factors that may precipitate sleep disorders include environmental, psychological and genetic factors...
April 11, 2018: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/29673860/the-endogenous-circadian-clock-programs-animals-to-eat-at-certain-times-of-the-24-hour-day-what-if-we-ignore-the-clock
#11
Peng Jiang, Fred W Turek
The discovery of the molecular mechanisms underlying the circadian clock, which functions in virtually every cell throughout the body to coordinate biological processes to anticipate and better adapt to daily rhythmic changes in the environment, is one of the major biomedical breakthroughs in the 20th century. Twenty years after this breakthrough, the biomedical community is now at a new frontier to incorporate the circadian clock mechanisms into many areas of biomedical research, as studies continue to reveal an important role of the circadian clock in a wide range of biological functions and diseases...
April 16, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29673244/changes-in-body-composition-blood-lipid-profile-and-growth-factor-hormone-in-a-patient-with-prader-willi-syndrome-during-24-weeks-of-complex-exercise-a-single-case-study
#12
Hee Joung Joung, In Soo Lim
PURPOSE: Prader-Willi syndrome (PWS) is a genetic disorder characterized by excessive appetite with progressive obesity and growth hormone (GH) deficiency. Excessive eating causes progressive obesity with increased risk of morbidities and mortality. Although GH treatment has beneficial effects on patients with PWS, adverse events have occurred during GH treatment. Exercise potentially has a positive effect on obesity management. The purpose of this research was to examine the effects of 24-week complex exercise program on changes in body composition, blood lipid profiles, and growth factor hormone levels in a patient with PWS...
March 30, 2018: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29671945/the-rs4686434-variant-in-the-fetub-locus-is-associated-with-intrahepatic-triglyceride-content-in-obese-chinese-adults
#13
Zhibin Li, Mingzhu Lin, Changqin Liu, Zheng Chen, Dongmei Wang, Xiulin Shi, Shuyu Yang, Xuejun Li
BACKGROUND: We aimed to explore associations of genetic variants in FETUB locus with intrahepatic triglyceride (IHTG) content. METHODS: We genotyped 4 tagging single-nucleotide polymorphisms (SNPs) of FETUB locus as well as PNPLA3 rs738409 and TM6SF2 rs58542926 in 418 obese Chinese adults who were measured on serum Fetuin-B and IHTG content. RESULTS: Subjects carrying the minor allele G for FETUB rs4686434 showed decreased serum Fetuin-B (AG/GG v...
April 19, 2018: Journal of Diabetes
https://www.readbyqxmd.com/read/29671539/evaluation-of-suspected-dementia
#14
Nathan Falk, Ariel Cole, T Jason Meredith
Dementia is a significant and costly health condition that affects 5 million adults and is the fifth leading cause of death among Americans older than 65 years. The prevalence of dementia will likely increase in the future because the number of Americans older than 65 years is expected to double by 2060. Risk factors for dementia include age; family history of dementia; personal history of cardiovascular disease, cerebrovascular disease, diabetes mellitus, or midlife obesity; use of anticholinergic medications; apolipoprotein E4 genotype; and lower education level...
March 15, 2018: American Family Physician
https://www.readbyqxmd.com/read/29670913/vegetarian-diet-and-cardiometabolic-risk-among-asian-indians-in-the-united-states
#15
Ranjita Misra, Padmini Balagopal, Sudha Raj, Thakor G Patel
Research studies have shown that plant-based diets confer cardiovascular and metabolic health benefits. Asian Indians (AIs) in the US (who have often followed plant-based diets) have elevated risk for chronic diseases such as diabetes, metabolic syndrome, and obesity suggesting ethnic vulnerability that imply genetic and/or lifestyle causative links. This study explored the association between this ethnic group and diabetes, obesity, and metabolic syndrome after controlling for demographics, acculturation, family history of diabetes, and lifestyle and clinical risk factors...
2018: Journal of Diabetes Research
https://www.readbyqxmd.com/read/29670770/genetic-variants-associated-with-hyperandrogenemia-in-pcos-pathophysiology
#16
REVIEW
Roshan Dadachanji, Nuzhat Shaikh, Srabani Mukherjee
Polycystic ovary syndrome is a multifactorial endocrine disorder whose pathophysiology baffles many researchers till today. This syndrome is typically characterized by anovulatory cycles and infertility, altered gonadotropin levels, obesity, and bulky multifollicular ovaries on ultrasound. Hyperandrogenism and insulin resistance are hallmark features of its complex pathophysiology. Hyperandrogenemia is a salient feature of PCOS and a major contributor to cosmetic anomalies including hirsutism, acne, and male pattern alopecia in affected women...
2018: Genetics Research International
https://www.readbyqxmd.com/read/29670283/genetic-identification-of-leptin-neural-circuits-in-energy-and-glucose-homeostases
#17
Jie Xu, Christopher L Bartolome, Cho Shing Low, Xinchi Yi, Cheng-Hao Chien, Peng Wang, Dong Kong
Leptin, a hormone produced in white adipose tissue, acts in the brain to communicate fuel status, suppress appetite following a meal, promote energy expenditure and maintain blood glucose stability1,2 . Dysregulation of leptin or its receptors (LEPR) results in severe obesity and diabetes3-5 . Although intensive studies on leptin have transformed obesity and diabetes research2,6 , clinical applications of the molecule are still limited 7 , at least in part owing to the complexity and our incomplete understanding of the underlying neural circuits...
April 18, 2018: Nature
https://www.readbyqxmd.com/read/29669715/genetic-and-environmental-contributions-to-the-covariation-between-cardiometabolic-traits
#18
Xu Chen, Ralf Kuja-Halkola, Zheng Chang, Robert Karlsson, Sara Hägg, Per Svensson, Nancy L Pedersen, Patrik K E Magnusson
BACKGROUND: The variation and covariation for many cardiometabolic traits have been decomposed into genetic and environmental fractions, by using twin or single-nucleotide polymorphism (SNP) models. However, differences in population, age, sex, and other factors hamper the comparison between twin- and SNP-based estimates. METHODS AND RESULTS: Twenty-four cardiometabolic traits and 700,000 genotyped SNPs were available in the study base of 10 682 twins from TwinGene cohort...
April 18, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29668871/transgenic-mice-overexpressing-srebp-1a-in-male-ob-ob-mice-exhibit-lipodystrophy-and-exacerbate-insulin-resistance
#19
Hiroshi Ohno, Takashi Matsuzaka, Nie Tang, Rahul Sharma, Kaori Motomura, Takuya Shimura, Aoi Satoh, Song-Iee Han, Yoshinori Takeuchi, Yuichi Aita, Hitoshi Iwasaki, Shigeru Yatoh, Hiroaki Suzuki, Motohiro Sekiya, Yoshimi Nakagawa, Hirohito Sone, Naoya Yahagi, Nobuhiro Yamada, Yoshikazu Higami, Hitoshi Shimano
Sterol regulatory element-binding protein-1a (SREBP-1a) is a key transcription factor which activates the expression of genes involved in the synthesis of fatty acids, triglycerides, and cholesterol. Transgenic mice that overexpress the nuclear form of SREBP-1a under the control of phosphoenolpyruvate carboxykinase (PEPCK) promoter (Tg-1a) were previously shown to display a lipodystrophic phenotype characterized by enlarged and fatty livers, diminished peripheral white adipose tissue (WAT), and insulin resistance...
April 12, 2018: Endocrinology
https://www.readbyqxmd.com/read/29668472/obesity-in-childhood-and-adolescence-genetic-factors
#20
Marko Kostovski, Velibor Tasic, Nevena Laban, Momir Polenakovic, Dragan Danilovski, Zoran Gucev
Obesity and excess weight are a pandemic phenomenon in the modern world. Childhood and adolescent obesity often ends up in obesity in adults. The costs of obesity and its consequences are staggering for any society, crippling for countries in development. Childhood obesity is also widespread in Macedonia. Metabolic syndrome, dyslipidemia and carbohydrate intolerance are found in significant numbers. Parents and grandparents are often obese. Some of the children are either dysmorphic, or slightly retarded. We have already described patients with Prader-Willi syndrome, Bardet-Biedl syndrome or WAGR syndrome...
December 1, 2017: Prilozi (Makedonska Akademija Na Naukite i Umetnostite. Oddelenie za Medicinski Nauki)
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