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https://www.readbyqxmd.com/read/28645202/effects-of-mobility-and-multimorbidity-on-inpatient-and-post-acute-health-care-utilization
#1
Kristine E Ensrud, Li-Yung Lui, Lisa Langsetmo, Tien N Vo, Brent C Taylor, Peggy M Cawthon, Meredith L Kilgore, Charles E McCulloch, Jane A Cauley, Marcia L Stefanick, Kristine Yaffe, Eric S Orwoll, John T Schousboe
Background: This study examines effects of mobility and multimorbidity on hospitalization and inpatient and post-acute care (PAC) facility days among older men. Methods: Prospective study of 1701 men (mean age 79.3 years) participating in MrOS Study Year 7 (Y7) examination (2007-2008) linked with their Medicare claims. At Y7, mobility ascertained by usual gait speed and categorized as poor, intermediate, or good. Multimorbidity quantified by applying Elixhauser algorithm to inpatient and outpatient claims and categorized as none, mild-moderate, or high...
June 22, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28583069/trajectories-of-the-relationships-of-physical-activity-with-body-composition-changes-in-older-men-the-mros-study
#2
Deepika R Laddu, Peggy M Cawthon, Neeta Parimi, Andrew R Hoffman, Eric Orwoll, Iva Miljkovic, Marcia L Stefanick
BACKGROUND: Excess adiposity gains and significant lean mass loss may be risk factors for chronic disease in old age. Long-term patterns of change in physical activity (PA) and their influence on body composition decline during aging has not been characterized. We evaluated the interrelationships of PA and body composition at the outset and over longitudinal follow-up to changes in older men. METHODS: Self-reported PA by the Physical Activity Scale for the Elderly (PASE), clinic body weight, and whole-body lean mass (LM) and fat mass, by dual-energy x-ray absorptiometry (DXA), were assessed in 5964 community-dwelling men aged ≥65 years at baseline (2000-2002) and at two subsequent clinic visits up until March 2009 (an average 4...
June 5, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28570003/age-of-onset-of-disease-in-subjects-with-severe-periodontitis-a-9-to-34-year-retrospective-study
#3
Sara Thorbert-Mros, Björn Cassel, Tord Berglundh
AIM: The aim was to retrospectively assess the age of onset of disease in a group of patients, 30-45 years of age, diagnosed with severe, generalized periodontitis. MATERIAL & METHODS: 74 patients agreed to be part of the study. Patient files and radiographs of 42 patients were retrieved from >80 private and public dental clinics. Interproximal sites in radiographs presenting with identifiable cement-enamel junction (CEJ) and alveolar bone crest (BC) were analyzed...
June 1, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28566123/funen-anorexia-nervosa-study-a-follow-up-study-on-outcome-mortality-quality-of-life-and-body-composition
#4
Laura Al-Dakhiel Winkler
Eating disorders (EDs) comprise a wide range of symptoms, with severe psychological and physical implications for the patient. EDs include anorexia nervosa (AN), bulimia nervosa (BN) and until 2013 eating disorder not otherwise specified (EDNOS), if criteria for AN or BN were not met. Patients suffering from an ED have poor prognosis, with more than half of AN patients not obtaining complete remission. One-fifth develops a chronic disease. EDs have an increased risk of premature death and patients with EDs report poorer quality of life (QoL) compared to both the general population and other psychiatric/somatic diseases...
June 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28557543/impaired-mitochondrial-microbicidal-responses-in-chronic-obstructive-pulmonary-disease-macrophages
#5
Martin A Bewley, Julie A Preston, Mohammed Mohasin, Helen M Marriott, Richard C Budd, Julie Swales, Paul Collini, David R Greaves, Ruth W Craig, Christopher E Brightling, Louise E Donnelly, Peter J Barnes, Dave Singh, Steven D Shapiro, Moira K B Whyte, David H Dockrell
RATIONALE: Chronic obstructive pulmonary disease (COPD) is characterized by impaired clearance of pulmonary bacteria. OBJECTIVES: The effect of COPD on alveolar macrophage (AM) microbicidal responses was investigated. METHODS: Alveolar macrophages (AMs) were obtained from bronchoalveolar lavage from healthy donors or COPD patients and challenged with opsonized serotype 14 Streptococcus pneumoniae. Cells were assessed for apoptosis, bactericidal activity and mitochondrial reactive oxygen species (mROS) production...
May 30, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28453606/determinants-of-change-in-objectively-assessed-sleep-duration-among-older-men
#6
Stephen F Smagula, Stephanie Harrison, Jane A Cauley, Sonia Ancoli-Israel, Peggy M Cawthon, Steve Cummings, Katie L Stone
We examined potential risk factors for changes in objectively assessed sleep duration within a large sample of community-dwelling older men. Participants (n = 1,055; mean baseline age = 74.6 (standard deviation (SD), 4.7) years) had repeated ActiGraph assessments (ActiGraph LLC, Pensacola, Florida) taken at the baseline (2003-2005) and follow-up (2009-2012) waves of the Outcomes of Sleep Disorders in Older Men Study (an ancillary study to the Osteoporotic Fractures in Men (MrOS) Study conducted in 6 US communities)...
May 15, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28448539/causal-relationship-between-obesity-and-serum-testosterone-status-in-men-a-bi-directional-mendelian-randomization-analysis
#7
Joel Eriksson, Robin Haring, Niels Grarup, Liesbeth Vandenput, Henri Wallaschofski, Erik Lorentzen, Torben Hansen, Dan Mellström, Oluf Pedersen, Matthias Nauck, Mattias Lorentzon, Lise Lotte Nystrup Husemoen, Henry Völzke, Magnus Karlsson, Sebastian E Baumeister, Allan Linneberg, Claes Ohlsson
CONTEXT: Obesity in men is associated with low serum testosterone and both are associated with several diseases and increased mortality. OBJECTIVES: Examine the direction and causality of the relationship between body mass index (BMI) and serum testosterone. DESIGN: Bi-directional Mendelian randomization (MR) analysis on prospective cohorts. SETTING: Five cohorts from Denmark, Germany and Sweden (Inter99, SHIP, SHIP Trend, GOOD and MrOS Sweden)...
2017: PloS One
https://www.readbyqxmd.com/read/28445781/mitochondrial-ros-control-of-cancer
#8
REVIEW
María Del Pilar Sosa Idelchik, Ulrike Begley, Thomas J Begley, J Andrés Melendez
Mitochondria serves a primary role in energy maintenance but also function to govern levels of mitochondria-derived reactive oxygen species (mROS). ROS have long been established to play a critical role in tumorigenesis and are now considered to be integral to the regulation of diverse signaling networks that drive proliferation, tumor cell survival and malignant progression. mROS can damage DNA, activate oncogenes, block the function of tumor suppressors and drive migratory signaling. The mitochondrion's oxidant scavenging systems including SOD2, Grx2, GPrx, Trx and TrxR are key of the cellular redox tone...
April 23, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28408307/mitochondrial-respiratory-chain-disorganization-in-parkinson-s-disease-relevant-pink1-and-dj1-mutants
#9
Irene Lopez-Fabuel, Lucia Martin-Martin, Monica Resch-Beusher, Garikoitz Azkona, Rosario Sanchez-Pernaute, Juan P Bolaños
Brain mitochondrial complex I (CI) damage is associated with the loss of the dopaminergic neurons of the Substantia Nigra in Parkinson's Disease (PD) patients. However, whether CI inhibition is associated with any alteration of the mitochondrial respiratory chain (MRC) organization in PD patients is unknown. To address this issue, here we analyzed the MRC by blue native gel electrophoresis (BNGE) followed by western blotting, in mitochondria purified from fibroblasts of patients harboring PD-relevant Pink1 mutations...
April 10, 2017: Neurochemistry International
https://www.readbyqxmd.com/read/28401939/mdr1-deficiency-impairs-mitochondrial-homeostasis-and-promotes-intestinal-inflammation
#10
G-T Ho, R E Aird, B Liu, R K Boyapati, N A Kennedy, D A Dorward, C L Noble, T Shimizu, R N Carter, E T S Chew, N M Morton, A G Rossi, R B Sartor, J P Iredale, J Satsangi
The multidrug resistance-1 (MDR1) gene encodes an ATP-dependent efflux transporter that is highly expressed in the colon. In mice, loss of MDR1 function results in colitis with similarities to human inflammatory bowel diseases (IBD). Here, we show that MDR1 has an unexpected protective role for the mitochondria where MDR1 deficiency results in mitochondrial dysfunction with increased mitochondrial reactive oxygen species (mROS) driving the development of colitis. Exogenous induction of mROS accelerates, while inhibition attenuates colitis in vivo; these effects are amplified in MDR1 deficiency...
April 12, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28393051/peroxiredoxin-6-negatively-regulates-bactericidal-activity-and-nf-%C3%AE%C2%BAb-activity-by-interrupting-traf6-ecsit-complex
#11
Yoon Min, Sae M Wi, Dongwoo Shin, Eunyoung Chun, Ki-Young Lee
A TRAF6-ECSIT complex is crucial for the generation of mitochondrial reactive oxygen species (mROS) and nuclear factor-kappa B (NF-κB) activation induced by Toll-like receptor 4 (TLR4). Peroxiredoxin-6 (Prdx6) as a member of the peroxiredoxin family of antioxidant enzymes is involved in antioxidant protection and cell signaling. Here, we report on a regulatory role of Prdx6 in mROS production and NF-κB activation by TLR4. Prdx6 was translocated into the mitochondria by TLR4 stimulation and Prdx6-knockdown (Prdx6(KD)) THP-1 cells had increased level of mitochondrial reactive oxygen species levels and were resistant to Salmonella typhimurium infection...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28390447/anxiety-symptoms-and-risk-of-cognitive-decline-in-older-community-dwelling-men
#12
Ahmed M Kassem, Mary Ganguli, Kristine Yaffe, Joseph T Hanlon, Oscar L Lopez, John W Wilson, Jane A Cauley
BACKGROUND: Previous research regarding anxiety as a predictor of future cognitive decline in older adults is limited and inconsistent. We examined the independent relationship between anxiety symptoms and subsequent cognitive decline. METHODS: We included 2,818 community-dwelling older men (mean age = 76.1, SD ±5.3 years) who were followed on an average for 3.4 years. We assessed anxiety symptoms at baseline using the Goldberg Anxiety Scale (GAS; range = 0-9)...
July 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28386112/sodium-fluoride-induces-nephrotoxicity-via-oxidative-stress-regulated-mitochondrial-sirt3-signaling-pathway
#13
Chao Song, Beibei Fu, Jingcheng Zhang, Jiamin Zhao, Mengke Yuan, Wei Peng, Yong Zhang, Haibo Wu
Accumulation of mitochondrial reactive oxygen species (mROS) has been implicated in the pathogenesis of fluorosis. As the main mitochondrial deacetylase, SIRT3 is closely associated with oxidative stress. To investigate the role of SIRT3 in response to sodium fluoride (NaF)-induced nephrotoxicity. Our results showed that NaF treatment impaired mitochondrial ultrastructure, decreased cell viability and increased apoptosis in TCMK-1 cells. Oxidative stress, detected by mROS and 8-Hydroxy-2'-deoxyguanosine (8-OHdG) were higher in NaF-treated cells, accompanied by decreased level of reduced glutathione (GSH)...
April 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28368469/older-men-with-anemia-have-increased-fracture-risk-independent-of-bone-mineral-density
#14
Rodrigo J Valderrábano, Jennifer Lee, Li-Yung Lui, Andrew R Hoffman, Steven R Cummings, Eric S Orwoll, Joy Y Wu
Context: Extreme low hemoglobin values have been linked to increased risk of fracture at different sites in a small number of studies. However, careful assessment of a clinically relevant cutoff for anemia and cross sectional and longitudinal bone mineral density (BMD) measures is lacking. Objective: To determine whether men with anemia were at increased risk of fracture after accounting for bone density and bone loss. Design: Cross-sectional analysis (at visit 3) and prospective analysis (from baseline to visit 3) in the Osteoporotic Fractures in Men (MrOS), a multi-site longitudinal cohort study...
March 20, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28366349/a-novel-approach-using-actigraphy-to-quantify-the-level-of-disruption-of-sleep-by-in-home-polysomnography-the-mros-sleep-study-sleep-disruption-by-polysomnography
#15
Terri Blackwell, Misti Paudel, Susan Redline, Sonia Ancoli-Israel, Katie L Stone
BACKGROUND: The "first-night effect" of polysomnography (PSG) has been previously studied; however, the ability to quantify the sleep disruption level has been confounded with the use of PSG on all nights. We used actigraphy to quantify disruption level and examined characteristics associated with disruption. METHODS: Totally, 778 older men (76.2 ± 5.4 years) from a population-based study at six US centers underwent one night of in-home PSG. Actigraphy was performed on the PSG night and three subsequent nights...
April 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28357316/the-curious-case-of-vanishing-mitochondria
#16
EDITORIAL
Anna Karnkowska, Vladimír Hampl
Due to their involvement in the energy metabolism, mitochondria are essential for most eukaryotic cells. Microbial eukaryotes living in low oxygen environments possess reduced forms of mitochondria, namely mitochondrion-related organelles (MROs). These do not produce ATP by oxidative phosphorylation on their membranes and some do not produce ATP at all. Still, they are indispensable because of other essential functions such as iron-sulphur (Fe-S) cluster assembly. Recently, the first microbial eukaryote with neither mitochondrion nor MRO was characterized - Monocercomonoides sp...
September 30, 2016: Microbial Cell
https://www.readbyqxmd.com/read/28329858/cystatin-c-and-the-risk-of-frailty-and-mortality-in-older-men
#17
Allyson Hart, Terri L Blackwell, Misti L Paudel, Brent C Taylor, Eric S Orwoll, Peggy M Cawthon, Kristine E Ensrud
Background: This study examines the association between cystatin C (cysC) levels and risks of progression of frailty status or death in older men. Methods: Prospective study of 2,613 men without overt frailty aged 67 years and older enrolled in the MrOS ancillary sleep study. Baseline measurements included serum cysC, serum creatinine, and frailty status. Repeat frailty status, performed an average of 3.4 years later, was assessed as an ordinal outcome of robust, intermediate stage (prefrail), frail or dead...
July 1, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28329087/clinical-definitions-of-sarcopenia-and-risk-of-hospitalization-in-community-dwelling-older-men-the-osteoporotic-fractures-in-men-study
#18
Peggy M Cawthon, Li-Yung Lui, Brent C Taylor, Charles E McCulloch, Jane A Cauley, Jodi Lapidus, Eric Orwoll, Kristine E Ensrud
Background: The association between various definitions of sarcopenia and hospitalization has not been evaluated in community-dwelling older men. Methods: We used data from 1,516 participants at Visit 3 of the Osteoporotic Fractures in Men (MrOS) study who also had linked Medicare Fee-For-Service Claims data available. We examined the association between several sarcopenia definitions (International Working Group, European Working Group for Sarcopenia in Older Persons, Foundation for the NIH Sarcopenia Project, Baumgartner, and Newman) and hospitalization, using two-part ("hurdle") models, adjusted for age, clinical center, functional limitations, self-reported health, comorbidity, and cognitive function...
January 18, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28326612/serum-phosphate-and-cognitive-function-in-older-men
#19
Yelena Slinin, Tien Vo, Brent C Taylor, Anne M Murray, John Schousboe, Lisa Langsetmo, Kristine Ensrud
OBJECTIVE: Determine whether serum phosphate is associated with concurrent cognitive impairment and subsequent cognitive decline in older men independent of demographic covariates and atherosclerotic risk factors. METHODS: In a prospective study of 5529 men enrolled in the Osteoporotic Fractures in Men study, we measured baseline serum phosphate, baseline cognitive function, and change in cognitive function between baseline and follow-up exams an average of 4.6 years later using the Modified Mini-Mental State (3MS) Examination and Trails B...
March 22, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28316103/identification-of-hip-bmd-loss-and-fracture-risk-markers-through-population-based-serum-proteomics
#20
Carrie M Nielson, Jack Wiedrick, Jian Shen, Jon Jacobs, Erin S Baker, Aaron Baraff, Paul Piehowski, Christine G Lee, Arie Baratt, Vladislav Petyuk, Shannon McWeeney, Jeong Youn Lim, Douglas C Bauer, Nancy E Lane, Peggy M Cawthon, Richard D Smith, Jodi Lapidus, Eric S Orwoll
Serum proteomics analysis may lead to the discovery of novel osteoporosis biomarkers. The Osteoporotic Fractures in Men (MrOS) study comprises men ≥65 years old in the US who have had repeated BMD measures and have been followed for incident fracture. High-throughput quantitative proteomic analysis was performed on baseline fasting serum samples from non-Hispanic white men using a multidimensional approach coupling liquid chromatography, ion-mobility separation, and mass spectrometry (LC-IMS-MS). We followed the participants for a mean of 4...
March 18, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
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