Medicine and Health Sciences Commons^™

Bioimpedance-Derived Membrane Capacitance: Clinically Relevant Sources Of Variability, Precision, And Reliability, Valene Garr Barry, Jasmine L Chiang, Kaylan G Bowman, Kristina D Johnson, Barbara A Gower

2020-Current year OA Pubs

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Peroxisomal Regulation Of Energy Homeostasis: Effect On Obesity And Related Metabolic Disorders, Brian Kleiboeker, Irfan J Lodhi

2020-Current year OA Pubs

BACKGROUND: Peroxisomes are single membrane-bound organelles named for their role in hydrogen peroxide production and catabolism. However, their cellular functions extend well beyond reactive oxygen species (ROS) metabolism and include fatty acid oxidation of unique substrates that cannot be catabolized in mitochondria, and synthesis of ether lipids and bile acids. Metabolic functions of peroxisomes involve crosstalk with other organelles, including mitochondria, endoplasmic reticulum, lipid droplets and lysosomes. Emerging studies suggest that peroxisomes are important regulators of energy homeostasis and that disruption of peroxisomal functions influences the risk for obesity and the associated metabolic disorders, including type 2 diabetes and hepatic …

Factors Associated With Initiation And Continuation Of Endocrine Therapy In Women With Hormone Receptor-Positive Breast Cancer, Beomyoung Cho, Maria Pérez, Donna B Jeffe, Matthew W Kreuter, Julie A Margenthaler, Graham A Colditz, Ying Liu

2020-Current year OA Pubs

BACKGROUND: Despite benefits of endocrine therapy (ET) for patients with hormone-receptor (HR)-positive breast cancer, many patients do not initiate or discontinue ET against recommendations.

METHODS: We identified variables associated with ET initiation and continuation, analyzing pooled data from two longitudinal studies at a National Cancer Institute comprehensive cancer center in St. Louis, Missouri. The sample included 533 women with newly diagnosed, non-metastatic, HR-positive breast cancer who completed interviews at enrollment and 6, 12, and 24 months after definitive surgical treatment. Logistic regression models estimated the adjusted odds ratio and 95% confidence interval (aOR [95% CI]) for each of self-reported ET …

Examination Of The Interaction Between Parental Military-Status And Race Among Non-Hispanic Black And Non-Hispanic White Adolescents With Overweight/Obesity, M K Higgins Neyland, Denise E Wilfley, Et Al.

2020-Current year OA Pubs

OBJECTIVES: Adolescent military-dependents experience distinct risk and protective factors, which may necessitate additional clinical considerations. In civilian youth, overweight/obesity is associated with eating, internalizing, and externalizing difficulties, with some studies reporting more difficulties among non-Hispanic White (vs. non-Hispanic Black) youth. It is unknown if these disparities exist among adolescent military-dependents, or between civilian and military-dependent youth.

METHODS: Non-Hispanic Black (187 civilian, 38 military-dependent) and non-Hispanic White (205 civilian, 84 military-dependent) adolescents with overweight/obesity (14.7 ± 1.6 years; 73.9% girls; body mass index adjusted for age and sex 1.9 ± 0.5) completed a disordered-eating interview; parents completed a measure assessing their …

The Power Of Partnerships: State Public Health Department Multisector Collaborations In Major Chronic Disease Programme Areas In The United States, Edward Tsai, Peg Allen, Louise Farah Saliba, Ross C Brownson

2020-Current year OA Pubs

BACKGROUND: Multisector collaboration between state public health departments (SHDs) and diverse community partners is increasingly recognized as important for promoting positive public health outcomes, addressing social determinants of health, and reducing health inequalities. This study investigates collaborations between SHDs in the United States and different types of organizations addressing chronic disease in and outside of the health sector.

METHODS: SHD employees were randomly selected from the National Association of Chronic Disease Directors membership list for participation in an online survey. Participants were asked about their primary chronic disease work unit (cancer, obesity, tobacco, diabetes, cardiovascular disease, and others), as well …

Changes In Adiposity Over The Life Course And Gene Expression In Postmenopausal Women, Yunan Han, Graham A Colditz, Adetunji T Toriola

2020-Current year OA Pubs

BACKGROUND: Early life adiposity and changes in adiposity over the life course are associated with mammographic breast density among postmenopausal women. However, the underlying mechanisms are unknown; therefore, we comprehensively examined the associations of early life body mass index (BMI) and changes in BMI from ages 10, 18 to age at mammogram with growth factor, RANK pathway, and sex hormone gene expression in 372 postmenopausal women.

METHODS: We estimated early life BMI at age 10 using the validated 9-level Stunkard pictogram. We calculated BMI at other ages (18, 30, and current age at mammogram) by dividing weight in kilograms at …

Silencing Alanine Transaminase 2 In Diabetic Liver Attenuates Hyperglycemia By Reducing Gluconeogenesis From Amino Acids, Michael R. Martino, Manuel Gutiérrez-Aguilar, Nicole K. H. Yiew, Andrew J. Lutkewitte, Jason M. Singer, Kyle S. Mccommis, Daniel Ferguson, Kim H. H. Liss, Jun Yoshino, M. Katie Renkemeyer, Gordon I. Smith, Kevin Cho, Justin A. Fletcher, Samuel Klein, Gary J. Patti, Shawn C. Burgess, Brian N. Finck

2020-Current year OA Pubs

Hepatic gluconeogenesis from amino acids contributes significantly to diabetic hyperglycemia, but the molecular mechanisms involved are incompletely understood. Alanine transaminases (ALT1 and ALT2) catalyze the interconversion of alanine and pyruvate, which is required for gluconeogenesis from alanine. We find that ALT2 is overexpressed in the liver of diet-induced obese and db/db mice and that the expression of the gene encoding ALT2 (GPT2) is downregulated following bariatric surgery in people with obesity. The increased hepatic expression of Gpt2 in db/db liver is mediated by activating transcription factor 4, an endoplasmic reticulum stress-activated transcription factor. Hepatocyte-specific knockout of Gpt2 attenuates incorporation of

Relationship Between Age At Menopause, Obesity, And Incident Heart Failure: The Atherosclerosis Risk In Communities Study, Imo A Ebong, Machelle D Wilson, Duke Appiah, Erin D Michos, Susan B Racette, Amparo Villablanca, Khadijah Breathett, Pamela L Lutsey, Melissa Wellons, Karol E Watson, Patricia Chang, Alain G Bertoni

2020-Current year OA Pubs

Background The mechanisms linking menopausal age and heart failure (HF) incidence are controversial. We investigated for heterogeneity by obesity on the relationship between menopausal age and HF incidence. Methods and Results Using postmenopausal women who attended the Atherosclerosis Risk in Communities Study Visit 4, we estimated hazard ratios of incident HF associated with menopausal age using Cox proportional hazards models, testing for effect modification by obesity and adjusting for HF risk factors. Women were categorized by menopausal age: <45 years, 45 to 49 years, 50 to 54 years, and ≥55 years. Among 4441 postmenopausal women, aged 63.5±5.5 years, there were 903 incident HF events over a mean follow-up of 16.5 years. The attributable risk of generalized and central obesity for HF incidence was greatest among women who experienced menopause at age ≥55 years: 11.09/1000 person-years and 7.38/1000 person-years, respectively. There were significant interactions of menopausal age with body mass index and waist circumference for HF incidence,

Dietary Patterns Are Associated With Improved Ovarian Reserve In Overweight And Obese Women: A Cross-Sectional Study Of The Lifestyle And Ovarian Reserve (Lore) Cohort, Ashley M Eskew, Bronwyn S Bedrick, Jorge E Chavarro, Joan K Riley, Emily S Jungheim

2020-Current year OA Pubs

BACKGROUND: Growing evidence suggests that adherence to certain dietary patterns is associated with improved fecundity and reproductive outcomes in the general population and infertile couples assisted reproductive treatments. The objective of this study was to assess if dietary patterns are associated with ovarian reserve in reproductive age women without a history of infertility.

METHODS: This was a cross-sectional study of 185 women in the Lifestyle and Ovarian Reserve (LORe) cohort. Women aged 18-44 without a history of infertility were recruited from the local community at an academic medical center. Subjects completed validated food frequency and physical activity questionnaires to assess …

Effect Of Aerobic Or Resistance Exercise, Or Both, On Intermuscular And Visceral Fat And Physical And Metabolic Function In Older Adults With Obesity While Dieting, Debra L Waters, Lina Aguirre, Burke Gurney, David R Sinacore, Kenneth Fowler, Giulia Gregori, Reina Armamento-Villareal, Clifford Qualls, Dennis T Villareal

2020-Current year OA Pubs

BACKGROUND: Obesity exacerbates age-related effects on body composition and physical and metabolic function. Which exercise mode is most effective in mitigating these deleterious changes in dieting older adults with obesity is unknown.

METHODS: In a randomized controlled trial, we performed a head-to-head comparison of aerobic (AEX), resistance (REX), or combination (COMB) exercise during matched ~10% weight loss in 160 obese older adults. Prespecified analyses compared 6-month changes in intermuscular adipose tissue (IMAT) and visceral adipose tissue (VAT) assessed using MRI, insulin sensitivity index (ISI) by oral glucose tolerance test, physical function using Modified Physical Performance Test (PPT), VO2peak, gait speed, …

The Influence Of Green Space On Obesity In China: A Systematic Review, Jing Shen, Mengfei Li, Qianhui Wang, Ruidong Liu, Mengmeng Ji, Ruopeng An

2020-Current year OA Pubs

INTRODUCTION: This study systematically reviewed scientific evidence concerning the influence of green space on obesity in China.

METHODS: Keyword and reference search was conducted in PubMed, Web of Science, Scopus, EBSCO, and CNKI. Predetermined selection criteria included study designs: experimental and observational studies; subjects: people of all ages; exposures: green space (i.e., any open land partly or entirely covered with grass, trees, shrubs, or other vegetation); outcomes: body weight status (e.g., body mass index [BMI], overweight, or obesity); and country: China.

RESULTS: Ten studies met the selection criteria and were included in the review. All studies adopted a cross-sectional design. …