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Gaskill SE, Skinner JS, Quindry J. Ventilatory Threshold Related to V̇O 2 reserve, Heart Rate Reserve, and Rating of Perceived Exertion in a Large Varied Sample. Med Sci Sports Exerc 2023; 55:1876-1885. [PMID: 37202881 PMCID: PMC10524184 DOI: 10.1249/mss.0000000000003220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
PURPOSE ACSM guidelines state that aerobic exercise intensity should be 30%/40% to 89% V̇O 2 reserve (V̇O 2 R) or heart rate reserve (HRR). Determining the proper intensity within this range is the "art" of exercise prescription, often relying on rating of perceived exertion (RPE) as the adjunctive intensity modulator. Current guidelines do not consider the use of ventilatory threshold (VT) due to the need for specialized equipment and methodological issues. The purpose of this investigation was to evaluate VT related to V̇O 2peak , V̇O 2 R, HRR, and RPE across the full spectrum of very low to very high V̇O 2peak values. METHODS Eight hundred and sixty-three records of exercise tests were retrospectively examined. Data were stratified for V̇O 2peak , activity level, age, test modality, and sex. RESULTS When stratified for V̇O 2peak , V̇O 2 at VT (V̇O 2 vt) had a lower mean value of ~14 mL·kg -1 ·min -1 in the lowest fit, rose gradually until median V̇O 2peak , and rose steeply thereafter. When graphed relative to V̇O 2peak , V̇O 2 vt as a percentage of V̇O 2 R (VT%V̇O 2 R) resembled a U-shaped curve, with a nadir ~43% V̇O 2 R at V̇O 2peak ~40 mL·kg -1 ·min -1 . Average VT%V̇O 2 R increased to ~75% in groups with the lowest or highest V̇O 2peak . There was a large variance in the value of VT at all V̇O 2peak levels. Mean RPE at VT was 12.5 ± 0.93, regardless of V̇O 2peak . CONCLUSIONS Given the relationship of VT as the transition from moderate- to higher-intensity exercise, these data may help the understanding of aerobic exercise prescription in persons across the spectrum of V̇O 2peak values.
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Affiliation(s)
- Steven E. Gaskill
- University of Montana, Integrative Physiology and Athletic Training, Missoula, MT
| | | | - John Quindry
- University of Montana, Integrative Physiology and Athletic Training, Missoula, MT
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Marini CF, Sisti D, Skinner JS, Sarzynski MA, Bouchard C, Amatori S, Rocchi MBL, Piccoli G, Stocchi V, Federici A, Lucertini F. Effect of individual characteristics and aerobic training on the %HRR-% V˙O 2R relationship. Eur J Sport Sci 2022:1-12. [PMID: 35960537 DOI: 10.1080/17461391.2022.2113441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study aimed to assess if, during incremental exercise, considering individual characteristics can make the relationship between the percentages of heart rate (HRR) and oxygen uptake (VO2R) reserve either 1:1 or more accurate. Cycle ergometer data of the maximal incremental exercise tests performed by 450 healthy and sedentary participants (17-66 years) of the HERITAGE Family Study, grouped for sex, ethnicity, age, body fat, resting HR, and VO2max, were used to calculate the individual linear regressions between %HRR and %VO2R. The mean slope and intercept of the individual linear regressions of each subgroup were compared with 1 and 0 (identity line), respectively, using Hotelling tests followed by post-hoc one-sample t-tests. Two multiple linear regressions were also performed, using either the slopes or intercepts of the individual linear regressions as dependent variables and sex, age, resting HR, and VO2max as independent variables. The mean %HRR-%VO2R relationships of all subgroups differed from the identity line. Moreover, individual linear regression intercepts (8.9±16.0) and slopes (0.971±0.190) changed (p<0.001) after 20 weeks of aerobic training (13.1±11.1 and 0.891±0.122). The multiple linear regressions could explain only 3.8% and 1.3% of the variance in the intercepts and slopes, whose variability remained high (standard error of estimate of 15.8 and 0.189). In conclusion, the %HRR-%VO2R relationship differs from the identity line regardless of individual characteristics and their difference increased after aerobic training. Moreover, due to the high interindividual variability, using a single equation for the whole population seems not suitable for representing the %HRR-%VO2R relationship of a given subject, even when several individual characteristics are considered.
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Affiliation(s)
- Carlo Ferri Marini
- Department of Biomolecular Sciences - Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Davide Sisti
- Department of Biomolecular Sciences - Unit of Biostatistics, University of Urbino Carlo Bo, Urbino, Italy
| | - James S Skinner
- Department of Kinesiology, Indiana University, Bloomington (IN), USA
| | - Mark A Sarzynski
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia (SC), USA
| | - Claude Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge (LA), USA
| | - Stefano Amatori
- Department of Biomolecular Sciences - Unit of Biostatistics, University of Urbino Carlo Bo, Urbino, Italy
| | - Marco B L Rocchi
- Department of Biomolecular Sciences - Unit of Biostatistics, University of Urbino Carlo Bo, Urbino, Italy
| | - Giovanni Piccoli
- Department of Biomolecular Sciences - Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Vilberto Stocchi
- Department of Human Sciences for the Promotion of Quality of Life, University San Raffaele Roma, Rome, Italy
| | - Ario Federici
- Department of Biomolecular Sciences - Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Francesco Lucertini
- Department of Biomolecular Sciences - Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, Italy
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Ferri Marini C, Federici A, Skinner JS, Piccoli G, Stocchi V, Zoffoli L, Correale L, Dell’Anna S, Naldini CA, Vandoni M, Lucertini F. Effect of steady-state aerobic exercise intensity and duration on the relationship between reserves of heart rate and oxygen uptake. PeerJ 2022; 10:e13190. [PMID: 35497191 PMCID: PMC9048681 DOI: 10.7717/peerj.13190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 03/08/2022] [Indexed: 01/12/2023] Open
Abstract
Background The percentages of heart rate (%HRR) or oxygen uptake (%V̇O2R) reserve are used interchangeably for prescribing aerobic exercise intensity due to their assumed 1:1 relationship, although its validity is debated. This study aimed to assess if %HRR and %V̇O2R show a 1:1 relationship during steady-state exercise (SSE) and if exercise intensity and duration affect their relationship. Methods Eight physically active males (age 22.6 ± 1.2 years) were enrolled. Pre-exercise and maximal HR and V̇O2 were assessed on the first day. In the following 4 days, different SSEs were performed (running) combining the following randomly assigned durations and intensities: 15 min, 45 min, 60% HRR, 80% HRR. Post-exercise maximal HR and V̇O2 were assessed after each SSE. Using pre-exercise and post-exercise maximal values, the average HR and V̇O2 of the last 5 min of each SSE were converted into percentages of the reserves (%RES), which were computed in a 3-way RM-ANOVA (α = 0.05) to assess if they were affected by the prescription parameter (HRR or V̇O2R), exercise intensity (60% or 80% HRR), and duration (15 or 45 min). Results The %RES values were not affected by the prescription parameter (p = 0.056) or its interactions with intensity (p = 0.319) or duration and intensity (p = 0.117), while parameter and duration interaction was significant (p = 0.009). %HRRs and %V̇O2Rs did not differ in the 15-min SSEs (mean difference [MD] = 0.7 percentage points, p = 0.717), whereas %HRR was higher than %V̇O2R in the 45-min SSEs (MD = 6.7 percentage points, p = 0.009). Conclusion SSE duration affects the %HRR-%V̇O2R relationship, with %HRRs higher than %V̇O2Rs in SSEs of longer duration.
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Affiliation(s)
- Carlo Ferri Marini
- Department of Biomolecular Sciences –Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Ario Federici
- Department of Biomolecular Sciences –Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - James S. Skinner
- Department of Kinesiology, Indiana University, Bloomington, IN, USA
| | - Giovanni Piccoli
- Department of Biomolecular Sciences –Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
| | - Vilberto Stocchi
- Department of Human Sciences for the Promotion of Quality of Life, University San Raffaele Roma, Rome, RM, Italy
| | - Luca Zoffoli
- Department of Biomolecular Sciences –Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy,Scientific Research & Innovation Department, Technogym S.p.A., Cesena, FC, Italy
| | - Luca Correale
- Sports Science Unit, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, PV, Italy
| | - Stefano Dell’Anna
- Sports Science Unit, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, PV, Italy,Department of Theoretical and Applied Sciences, eCampus University, Novedrate, CO, Italy
| | - Carlo Alberto Naldini
- Laboratory of Adapted Motor Activity (LAMA), Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, PV, Italy
| | - Matteo Vandoni
- Laboratory of Adapted Motor Activity (LAMA), Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, PV, Italy
| | - Francesco Lucertini
- Department of Biomolecular Sciences –Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, PU, Italy
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Barber JL, Ruiz-Ramie JJ, Robbins JM, Gerszten RE, Leon AS, Rao DC, Skinner JS, Bouchard C, Sarzynski MA. Regular exercise and patterns of response across multiple cardiometabolic traits: the HERITAGE family study. Br J Sports Med 2022; 56:95-100. [PMID: 33619128 PMCID: PMC8380259 DOI: 10.1136/bjsports-2020-103323] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2021] [Indexed: 01/03/2023]
Abstract
OBJECTIVES We investigated whether high responsiveness or low responsiveness to exercise training aggregates in the same individuals across seven cardiometabolic traits. METHODS A total of 564 adults (29.2% black, 53.7% female) from the HERITAGE family study completed a 20-week endurance training programme (at 55%-75% of participants' maximal oxygen uptake (VO2max)) with VO2max, per cent body fat, visceral adipose tissue, fasting levels of insulin, high-density lipoprotein cholesterol, small low-density lipoprotein particles and inflammatory marker GlycA measured before and after training. For each exercise response trait, we created ethnicity-specific, sex-specific and generation-specific quintiles. High responses were defined as those within the 20th percentile representing the favourable end of the response trait distribution, low responses were defined as the 20th percentile from the least favourable end, and the remaining were labelled as average responses. RESULTS Only one individual had universally high or low responses for all seven cardiometabolic traits. Almost half (49%) of the cohort had at least one high response and one low response across the seven traits. About 24% had at least one high response but no low responses, 24% had one or more low responses but no high responses, and 2.5% had average responses across all traits. CONCLUSIONS Interindividual variation in exercise responses was evident in all the traits we investigated, and responsiveness did not aggregate consistently in the same individuals. While adherence to an exercise prescription is known to produce health benefits, targeted risk factors may not improve.
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Affiliation(s)
- Jacob L Barber
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - Jonathan J Ruiz-Ramie
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - Jeremy M Robbins
- Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | | | - Arthur S Leon
- School of Kinesiology, University of Minnesota, Minneapolis, Minnesota, USA
| | - DC Rao
- Division of Biostatistics, Washington University School of Medicine in Saint Louis, Saint Louis, Missouri, USA
| | - James S Skinner
- Department of Kinesiology, Indiana University Bloomington, Bloomington, Indiana, USA
| | - Claude Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Mark A Sarzynski
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
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Ayala EJ, Barber JL, Schwartz CS, Robbins JM, Gerszten RE, Wang X, Skinner JS, Bouchard C, Sarzynski MA. Clinical Predictors Of Vo 2 Max Response To Endurance Training: Heritage Family Study. Med Sci Sports Exerc 2021. [DOI: 10.1249/01.mss.0000759256.06517.c6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jones A, Barber JL, Ayala EJ, Schwartz CS, Clarkson WA, Skinner JS, Bouchard C, Sarzynski MA. Cardiorespiratory Fitness At Baseline And In Response To Training Across Metabolic Health And Weight Phenotypes. Med Sci Sports Exerc 2021. [DOI: 10.1249/01.mss.0000764404.55083.85] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jones A, Barber JL, Skinner JS, Bouchard C, Sarzynski MA. Abstract 075: Differences In Body Composition At Baseline And In Response To Exercise Training By Metabolic Health And Weight Status. Circulation 2021. [DOI: 10.1161/circ.143.suppl_1.075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Body composition is known to differ across metabolic health and weight phenotypes. Regular exercise improves body composition, yet little is known about differences in exercise response across metabolic health and weight phenotypes.
Methods:
Normal weight (n=376) and overweight/obese (OWOB) adults (n=456) from the HERITAGE Family Study (56% female, 38% Black) completed a 20-week endurance training program. Four groups based on baseline BMI and metabolic risk were created: metabolically healthy normal weight, MHNW; metabolically unhealthy normal weight, MUNW; metabolically healthy OWOB, MHO; and metabolically unhealthy OWOB, MUO. Unhealthy was defined as having ≥2 metabolic syndrome components. General linear models tested for differences in baseline and change in measures of body composition (fat mass [FM], fat-free mass [FFM], % body fat [%BF], visceral fat) after adjusting for age, sex, and ethnicity (and baseline value in change models).
Results:
Table 1 shows adjusted mean baseline and change in body composition values by group. Baseline body composition tended to track with weight status, with NW adults having lower FM, %BF, and visceral fat compared to obese adults (p<0.05), regardless of metabolic health. However, the MHO group had lower baseline values of these traits compared to MUO (p<0.05). Body composition measures significantly improved with exercise training in all groups, however, the magnitude of change differed between groups. For example, both NW groups had larger decreases in %BF compared to the obese groups, with MUNW showing the largest decrease. Conversely, MHNW showed the largest decrease in visceral fat, which was greater than both obese groups, but change in visceral fat was similar between MHO and MUNW.
Conclusions:
Normal weight adults tended to have better body composition profiles at baseline and larger improvements with exercise compared to obese adults, regardless of metabolic health. Within weight groups, body composition improved regardless of metabolic health status.
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Ferri Marini C, Sisti D, Leon AS, Skinner JS, Sarzynski MA, Bouchard C, Rocchi MBL, Piccoli G, Stocchi V, Federici A, Lucertini F. HRR and V˙O2R Fractions Are Not Equivalent: Is It Time to Rethink Aerobic Exercise Prescription Methods? Med Sci Sports Exerc 2021; 53:174-182. [PMID: 32694364 DOI: 10.1249/mss.0000000000002434] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION According to current guidelines, the intensity of health-enhancing aerobic exercise should be prescribed using a percentage of heart rate reserve (%HRR), which is considered to be more closely associated (showing a 1:1 relation) with the percentage of oxygen uptake reserve (%V˙O2R) rather than with the percentage of maximal oxygen uptake (%V˙O2max) during incremental exercise. However, the associations between %HRR and %V˙O2R and between %HRR and %V˙O2max are under debate; hence, their actual relationships were investigated in this study. METHODS Data from each stage of a maximal incremental exercise test performed by 737 healthy and physically inactive participants of the HERITAGE Family Study were screened and filtered then used to calculate the individual linear regressions between %HRR and either %V˙O2R or %V˙O2max. For each relationship, the mean slope and intercept of the individual linear regression were compared with 1 and 0 (i.e., the identity line), respectively, using one-sample t-tests. The individual root mean square errors of the actual versus the 1:1 predicted %HRR were calculated for both relationships and compared using a paired-sample t-test. RESULTS The mean slopes (%HRR-%V˙O2R, 0.972 ± 0.189; %HRR-%V˙O2max, 1.096 ± 0.216) and intercepts (%HRR-%V˙O2R, 8.855 ± 16.022; %HRR-%V˙O2max, -3.616 ± 18.993) of both relationships were significantly different from 1 and 0, respectively, with high interindividual variability. The average root mean square errors were high and revealed that the %HRR-%V˙O2max relationship was more similar to the identity line (P < 0.001) than the %HRR-%V˙O2R relationship (7.78% ± 4.49% vs 9.25% ± 5.54%). CONCLUSIONS Because both relationships are different from the identity line and using a single equation may not be appropriate to predict exercise intensity at the individual level, a rethinking of the relationships between the intensity variables may be necessary to ensure that the most suitable health-enhancing aerobic exercise intensity is prescribed.
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Affiliation(s)
- Carlo Ferri Marini
- Department of Biomolecular Sciences, Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, ITALY
| | - Davide Sisti
- Department of Biomolecular Sciences, Unit of Biostatistics, University of Urbino Carlo Bo, Urbino, ITALY
| | - Arthur S Leon
- Department of Kinesiology, University of Minnesota, Minneapolis, MN
| | - James S Skinner
- Department of Kinesiology, Indiana University, Bloomington, IN
| | - Mark A Sarzynski
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC
| | - Claude Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA
| | - Marco B L Rocchi
- Department of Biomolecular Sciences, Unit of Biostatistics, University of Urbino Carlo Bo, Urbino, ITALY
| | - Giovanni Piccoli
- Department of Biomolecular Sciences, Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, ITALY
| | - Vilberto Stocchi
- Department of Biomolecular Sciences, Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, ITALY
| | - Ario Federici
- Department of Biomolecular Sciences, Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, ITALY
| | - Francesco Lucertini
- Department of Biomolecular Sciences, Division of Exercise and Health Sciences, University of Urbino Carlo Bo, Urbino, ITALY
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Sarzynski MA, Ruiz-Ramie JJ, Barber JL, Robbins JM, Gerszten RE, Leon AS, Skinner JS, Bouchard C. Patterns Of High And Low Response To Regular Exercise Across Multiple Clinically Relevant Traits. Med Sci Sports Exerc 2020. [DOI: 10.1249/01.mss.0000679160.89658.00] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ross R, Goodpaster BH, Koch LG, Sarzynski MA, Kohrt WM, Johannsen NM, Skinner JS, Castro A, Irving BA, Noland RC, Sparks LM, Spielmann G, Day AG, Pitsch W, Hopkins WG, Bouchard C. Precision exercise medicine: understanding exercise response variability. Br J Sports Med 2019; 53:1141-1153. [PMID: 30862704 PMCID: PMC6818669 DOI: 10.1136/bjsports-2018-100328] [Citation(s) in RCA: 138] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2019] [Indexed: 12/14/2022]
Abstract
There is evidence from human twin and family studies as well as mouse and rat selection experiments that there are considerable interindividual differences in the response of cardiorespiratory fitness (CRF) and other cardiometabolic traits to a given exercise programme dose. We developed this consensus statement on exercise response variability following a symposium dedicated to this topic. There is strong evidence from both animal and human studies that exercise training doses lead to variable responses. A genetic component contributes to exercise training response variability. In this consensus statement, we (1) briefly review the literature on exercise response variability and the various sources of variations in CRF response to an exercise programme, (2) introduce the key research designs and corresponding statistical models with an emphasis on randomised controlled designs with or without multiple pretests and post-tests, crossover designs and repeated measures designs, (3) discuss advantages and disadvantages of multiple methods of categorising exercise response levels—a topic that is of particular interest for personalised exercise medicine and (4) outline approaches that may identify determinants and modifiers of CRF exercise response. We also summarise gaps in knowledge and recommend future research to better understand exercise response variability.
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Affiliation(s)
- Robert Ross
- School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada
| | - Bret H Goodpaster
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida, USA
| | - Lauren G Koch
- Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio, USA
| | - Mark A Sarzynski
- Department of Exercise Science, University of South Carolina, Columbia, South Carolina, USA
| | - Wendy M Kohrt
- Division of Geriatric Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Neil M Johannsen
- Interventional Resources, Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA.,School of Kinesiology, Louisiana State University, Baton Rouge, Louisiana, USA
| | - James S Skinner
- Department of Kinesiology, Indiana University, Bloomington, Indiana, USA
| | - Alex Castro
- Department of Physical Education, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Brian A Irving
- School of Kinesiology, Louisiana State University, Baton Rouge, Louisiana, USA.,Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Robert C Noland
- John S Mcilhenny Skeletal Muscle Physiology Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Lauren M Sparks
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida, USA
| | - Guillaume Spielmann
- School of Kinesiology, Louisiana State University, Baton Rouge, Louisiana, USA.,Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
| | - Andrew G Day
- Kingston General Health Research Institute, Kingston Health Sciences Centre, Kingston, Ontario, Canada
| | - Werner Pitsch
- Economics and Sociology of Sport, Saarland University, Saarbrücken, Saarland, Germany
| | - William G Hopkins
- College of Sport and Exercise Science, Victoria University, Melbourne, Victoria, Australia
| | - Claude Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA
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Barber JL, Kraus WE, Church TS, Hagberg JM, Thompson PD, Bartlett DB, Beets MW, Earnest CP, Huffman KM, Landers-Ramos RQ, Leon AS, Rao DC, Seip RL, Skinner JS, Slentz CA, Wilund KR, Bouchard C, Sarzynski MA. Effects of regular endurance exercise on GlycA: Combined analysis of 14 exercise interventions. Atherosclerosis 2018; 277:1-6. [PMID: 30170218 PMCID: PMC6298739 DOI: 10.1016/j.atherosclerosis.2018.07.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/17/2018] [Accepted: 07/25/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND AND AIMS GlycA is a relatively new biomarker for inflammation as well as cardiometabolic disease risk. However, the effect of exercise on GlycA is largely unknown. Therefore, the purpose of this study was to examine the effects of regular exercise on the inflammatory marker GlycA across seven studies and 14 exercise interventions. METHODS Nuclear magnetic resonance spectroscopy, specifically signal amplitudes originating from the N-acetyl methyl group protons of the N-acetylglucosamine residues on the glycan branches of glycoproteins, was used to quantify GlycA concentrations. GlycA was measured before and after completion of an exercise intervention in 1568 individuals across seven studies and 14 exercise interventions. Random effects inverse variance weighting models were used to pool effects across interventions. RESULTS Combined analysis of unadjusted data showed that regular exercise significantly (p = 2 × 10-6) reduced plasma GlycA (-8.26 ± 1.8 μmol/L). This reduction remained significant (-9.12 ± 1.9 μmol/L, p = 1.22 × 10-6) following adjustment for age, sex, race, baseline BMI, and baseline GlycA. Changes in GlycA were correlated with changes in traditional inflammatory markers, C-reactive protein, interleukin-6, and fibrinogen, however, these correlations were relatively weak (range r: 0.21-0.38, p < 0.0001). CONCLUSIONS Regular exercise significantly reduced plasma GlycA across 14 different exercise interventions despite differences in exercise programs and study populations. The current study provides a greater understanding of the use of exercise as a potential therapy for the reduction of systemic inflammation. Further research is needed to understand the mechanisms behind the exercise-related reductions in GlycA.
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Affiliation(s)
- Jacob L Barber
- Department of Exercise Science, University of South Carolina, Columbia, SC, USA
| | - William E Kraus
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | | | - James M Hagberg
- Department of Kinesiology, University of Maryland, College Park, MD, USA
| | | | - David B Bartlett
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | - Michael W Beets
- Department of Exercise Science, University of South Carolina, Columbia, SC, USA
| | - Conrad P Earnest
- Department of Health & Kinesiology, Texas A&M University, College Station, TX, USA
| | - Kim M Huffman
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | | | - Arthur S Leon
- School of Kinesiology, University of Minnesota, Minneapolis, MN, USA
| | - D C Rao
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, USA
| | - Richard L Seip
- Cardiology Division, Hartford Hospital, Hartford, CT, USA
| | - James S Skinner
- Professor Emeritus of Kinesiology, Indiana University, Bloomington, IN, USA
| | - Cris A Slentz
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | - Kenneth R Wilund
- Department of Kinesiology and Community Health, University of Illinois, Urbana-Champaign, IL, USA
| | | | - Mark A Sarzynski
- Department of Exercise Science, University of South Carolina, Columbia, SC, USA.
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Ghoshal S, Stevens JR, Billon C, Girardet C, Sitaula S, Leon AS, Rao DC, Skinner JS, Rankinen T, Bouchard C, Nuñez MV, Stanhope KL, Howatt DA, Daugherty A, Zhang J, Schuelke M, Weiss EP, Coffey AR, Bennett BJ, Sethupathy P, Burris TP, Havel PJ, Butler AA. Adropin: An endocrine link between the biological clock and cholesterol homeostasis. Mol Metab 2017; 8:51-64. [PMID: 29331507 PMCID: PMC5985041 DOI: 10.1016/j.molmet.2017.12.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/28/2017] [Accepted: 12/02/2017] [Indexed: 01/13/2023] Open
Abstract
Objective Identify determinants of plasma adropin concentrations, a secreted peptide translated from the Energy Homeostasis Associated (ENHO) gene linked to metabolic control and vascular function. Methods Associations between plasma adropin concentrations, demographics (sex, age, BMI) and circulating biomarkers of lipid and glucose metabolism were assessed in plasma obtained after an overnight fast in humans. The regulation of adropin expression was then assessed in silico, in cultured human cells, and in animal models. Results In humans, plasma adropin concentrations are inversely related to atherogenic LDL-cholesterol (LDL-C) levels in men (n = 349), but not in women (n = 401). Analysis of hepatic Enho expression in male mice suggests control by the biological clock. Expression is rhythmic, peaking during maximal food consumption in the dark correlating with transcriptional activation by RORα/γ. The nadir in the light phase coincides with the rest phase and repression by Rev-erb. Plasma adropin concentrations in nonhuman primates (rhesus monkeys) also exhibit peaks coinciding with feeding times (07:00 h, 15:00 h). The ROR inverse agonists SR1001 and the 7-oxygenated sterols 7-β-hydroxysterol and 7-ketocholesterol, or the Rev-erb agonist SR9009, suppress ENHO expression in cultured human HepG2 cells. Consumption of high-cholesterol diets suppress expression of the adropin transcript in mouse liver. However, adropin over expression does not prevent hypercholesterolemia resulting from a high cholesterol diet and/or LDL receptor mutations. Conclusions In humans, associations between plasma adropin concentrations and LDL-C suggest a link with hepatic lipid metabolism. Mouse studies suggest that the relationship between adropin and cholesterol metabolism is unidirectional, and predominantly involves suppression of adropin expression by cholesterol and 7-oxygenated sterols. Sensing of fatty acids, cholesterol and oxysterols by the RORα/γ ligand-binding domain suggests a plausible functional link between adropin expression and cellular lipid metabolism. Furthermore, the nuclear receptors RORα/γ and Rev-erb may couple adropin synthesis with circadian rhythms in carbohydrate and lipid metabolism. In male humans, plasma adropin concentrations are inversely related to low-density circulating cholesterol (LDL-C) levels. Adropin expression is regulated by core elements of the biological clock (RORA/G, Rev-Erb). Sterol-sensing by the ROR ligand-binding domain provides a plausible link between adropin expression and lipid metabolism. In mouse liver, adropin expression is rhythmic and suppressed by exogenous (dietary) cholesterol.
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Affiliation(s)
- Sarbani Ghoshal
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Joseph R Stevens
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Cyrielle Billon
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Clemence Girardet
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Sadichha Sitaula
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Arthur S Leon
- School of Kinesiology and Leisure Studies, University of Minnesota, Minneapolis, MN, USA
| | - D C Rao
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, USA
| | - James S Skinner
- Department of Kinesiology, Indiana University, Bloomington, IN, USA
| | - Tuomo Rankinen
- Human Genomics Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Claude Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, USA
| | - Marinelle V Nuñez
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA; Department of Nutrition, School of Medicine, University of California-Davis, Davis, CA, USA
| | - Kimber L Stanhope
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA; Department of Nutrition, School of Medicine, University of California-Davis, Davis, CA, USA
| | - Deborah A Howatt
- Saha Cardiovascular Research Center, Department of Physiology, University of Kentucky, KY, USA
| | - Alan Daugherty
- Saha Cardiovascular Research Center, Department of Physiology, University of Kentucky, KY, USA
| | - Jinsong Zhang
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Matthew Schuelke
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Edward P Weiss
- Department of Nutrition and Dietetics, Doisy College of Health Sciences, Saint Louis University, St. Louis, MO, USA
| | - Alisha R Coffey
- Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, NC, USA
| | - Brian J Bennett
- Obesity and Metabolism Unit, Western Human Nutrition Center, USDA-ARS, Davis, CA, USA
| | - Praveen Sethupathy
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Thomas P Burris
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA
| | - Peter J Havel
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA; Department of Nutrition, School of Medicine, University of California-Davis, Davis, CA, USA
| | - Andrew A Butler
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis University, St. Louis, MO, USA.
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Slagowski CR, Dixson SE, Moynes RC, Dai B, Skinner JS, Smith DT. High-intensity Low-volume Training Improves Glycemic Control and Functional Fitness in Type 2 Diabetics. Med Sci Sports Exerc 2016. [DOI: 10.1249/01.mss.0000485242.58387.4e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Sarzynski MA, Burton J, Rankinen T, Blair SN, Church TS, Després JP, Hagberg JM, Landers-Ramos R, Leon AS, Mikus CR, Rao DC, Seip RL, Skinner JS, Slentz CA, Thompson PD, Wilund KR, Kraus WE, Bouchard C. The effects of exercise on the lipoprotein subclass profile: A meta-analysis of 10 interventions. Atherosclerosis 2015; 243:364-72. [PMID: 26520888 PMCID: PMC4663138 DOI: 10.1016/j.atherosclerosis.2015.10.018] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 10/12/2015] [Accepted: 10/14/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The goal was to examine lipoprotein subclass responses to regular exercise as measured in 10 exercise interventions derived from six cohorts. METHODS Nuclear magnetic resonance spectroscopy was used to quantify average particle size, total and subclass concentrations of very low-density lipoprotein, low-density lipoprotein, and high-density lipoprotein particles (VLDL-P, LDL-P, and HDL-P, respectively) before and after an exercise intervention in 1555 adults from six studies, encompassing 10 distinct exercise programs: APOE (N = 106), DREW (N = 385), GERS (N = 79), HERITAGE (N = 715), STRRIDE I (N = 168) and II (N = 102). Random-effects meta-analyses were performed to evaluate the overall estimate of mean change across the unadjusted and adjusted mean change values from each exercise group. RESULTS Meta-analysis of unadjusted data showed that regular exercise induced significant decreases in the concentration of large VLDL-P, small LDL-P, and medium HDL-P and mean VLDL-P size, with significant increases in the concentration of large LDL-P and large HDL-P and mean LDL-P size. These changes remained significant in meta-analysis with adjustment for age, sex, race, baseline body mass index, and baseline trait value. CONCLUSIONS Despite differences in exercise programs and study populations, regular exercise produced putatively beneficial changes in the lipoprotein subclass profile across 10 exercise interventions. Further research is needed to examine how exercise-induced changes in lipoprotein subclasses may be associated with (concomitant changes in) cardiovascular disease risk.
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Affiliation(s)
| | - Jeffrey Burton
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - Tuomo Rankinen
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - Steven N Blair
- Department of Exercise Science, University of South Carolina, Columbia, SC, USA
| | | | - Jean-Pierre Després
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Québec, Canada
| | - James M Hagberg
- Department of Kinesiology, University of Maryland, College Park, MD, USA
| | - Rian Landers-Ramos
- Department of Kinesiology, University of Maryland, College Park, MD, USA
| | - Arthur S Leon
- School of Kinesiology, University of Minnesota, Minneapolis, MN, USA
| | - Catherine R Mikus
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | - D C Rao
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, USA
| | - Richard L Seip
- Cardiology Division, Hartford Hospital, Hartford, CT, USA
| | | | - Cris A Slentz
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
| | | | - Kenneth R Wilund
- Department of Kinesiology and Community Health, University of Illinois, Urbana-Champaign, IL, USA
| | - William E Kraus
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC, USA
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15
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Fazal IA, Bhagra SK, Bailey KM, Dermot Neely R, MacGowan GA, Skinner JS. Impact of using different guideline recommended serum natriuretic peptide thresholds on the diagnosis and referral rates of a diagnostic heart failure clinic. Int J Clin Pract 2015; 69:1349-56. [PMID: 26194330 DOI: 10.1111/ijcp.12694] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 06/15/2015] [Indexed: 11/30/2022] Open
Abstract
AIMS The aims of this study were to determine the diagnostic yield of a dedicated heart failure diagnosis clinic and the impact of using different guideline recommended N-terminal pro B-type natriuretic peptide (NT-proBNP) referral thresholds on diagnosis and referral patterns. METHODS AND RESULTS Patients referred by primary care between September 2011 and May 2013 were included in the analysis. Data collected included baseline characteristics, NT-proBNP levels, echocardiographic and clinical findings, final diagnosis and outcome. The impact of using Newcastle (locally modified age-adjusted NT-proBNP thresholds), National Institute for Health and Care Excellence (NICE) and European Society of Cardiology (ESC) NT-proBNP thresholds on diagnosis and referrals was determined by applying the different guidelines to this population. A total of 208 patients were referred; median age 77.5 years and 62.5% were women. Thirty-four patients (16.3%) had systolic heart failure, 50 patients (24.0%) had heart failure with preserved ejection fraction. One hundred and six patients (51.0%) did not have heart failure. Using NICE guidelines (NT-proBNP ≥ 400 ng/l) instead of the Newcastle age-adjusted NT-proBNP referral thresholds results in 59 fewer referrals, but eight heart failure diagnoses were missed. Using the ESC cut-off of NT-proBNP ≥ 125 ng/l would result in 88 additional referrals; one diagnosis of heart failure would be missed. Over a mean follow-up of 16.8 ± 6 months there were 21 deaths and 47 hospital admissions. CONCLUSION The Newcastle age-adjusted thresholds led to more referrals in comparison to NICE guidelines but are more sensitive in diagnosing heart failure. Using ESC recommended thresholds results in a similar diagnostic yield to our age-adjusted thresholds, but has the potential to significantly increase the referrals in patients ≥ 75 years, which may result in a lower diagnostic yield.
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Affiliation(s)
- I A Fazal
- Department of Cardiology, Freeman Hospital, Newcastle upon Tyne, UK
| | - S K Bhagra
- Department of Cardiology, Freeman Hospital, Newcastle upon Tyne, UK
| | - K M Bailey
- Department of Cardiology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
| | - R Dermot Neely
- Department of Cardiology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
| | - G A MacGowan
- Department of Cardiology, Freeman Hospital, Newcastle upon Tyne, UK
| | - J S Skinner
- Department of Cardiology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
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Skinner JS, Judge S, Malone A, Moynes RC, Conviser J, Smith DT. Improved Functional Independence, Balance, And Force Production With Low-volume, Alternative Training In Older Adults. Med Sci Sports Exerc 2015. [DOI: 10.1249/01.mss.0000477851.16664.80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Moynes RC, Rockey SS, Conviser J, Skinner JS, Smith DT. High-intensity BiodensityTm Training. Med Sci Sports Exerc 2014. [DOI: 10.1249/01.mss.0000493474.52977.f8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Skinner JS, Smith DT, Rockey SS, Moynes RC, Conviser J. Strength Changes In Males And Females Completing 8-24 Sessions Of High-intensity Training Once A Week. Med Sci Sports Exerc 2014. [DOI: 10.1249/01.mss.0000493502.17097.bc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Ukkola O, Rankinen T, Lakka T, Leon AS, Skinner JS, Wilmore JH, Rao DC, Kesäniemi YA, Bouchard C. Protein Tyrosine Phosphatase 1B Variant Associated with Fat Distribution and Insulin Metabolism. ACTA ACUST UNITED AC 2012; 13:829-34. [PMID: 15919835 DOI: 10.1038/oby.2005.95] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Protein tyrosine phosphatase 1B (PTPN1) affects the regulation of insulin signaling and energy metabolism. We studied whether polymorphisms in the PTPN1 gene impact body fat distribution in the HERITAGE Family Study cohort in 502 white and 276 black subjects. Insulin sensitivity index, glucose disappearance index, acute insulin response to glucose (AIR(glucose)), and the disposition index (DI) were obtained from the frequently sampled intravenous glucose tolerance test. White subjects with the G82G at the PTPN1 IVS6+G82A polymorphism had higher body fat levels (p = 0.031) and sum of eight skinfolds (p = 0.003) and highest subcutaneous fat on the limbs (p = 0.002). G82A subjects had the lowest AIR(glucose) (p = 0.005) and disposition index (p = 0.040). Interaction effects between PTPN1 and leptin receptor gene variants influenced insulin sensitivity index and AIR(glucose) (p from 0.006 to 0.010). The variant PTPN1 Pro387Leu was associated with lower fasting insulin level (p = 0.035) and glucose disappearance index (p = 0.038). In summary, PTPN1 IVS6+G82G homozygotes showed higher levels of all measures of adiposity. G82 allele heterozygotes are potentially at higher risk for type 2 diabetes. Gene-gene interactions between the PTPN1 and leptin receptor genes contributed to the phenotypic variability of insulin sensitivity. The PTPN1 Pro387Leu variant was associated with lower glucose tolerance.
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Affiliation(s)
- Olavi Ukkola
- Pennington Biomedical Research Center, Louisiana State University, 6400 Perkins Road, Baton Rouge, LA 70808-4124, USA
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20
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Bouchard C, Blair SN, Church TS, Earnest CP, Hagberg JM, Häkkinen K, Jenkins NT, Karavirta L, Kraus WE, Leon AS, Rao DC, Sarzynski MA, Skinner JS, Slentz CA, Rankinen T. Adverse metabolic response to regular exercise: is it a rare or common occurrence? PLoS One 2012; 7:e37887. [PMID: 22666405 PMCID: PMC3364277 DOI: 10.1371/journal.pone.0037887] [Citation(s) in RCA: 257] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 04/25/2012] [Indexed: 02/01/2023] Open
Abstract
Background Individuals differ in the response to regular exercise. Whether there are people who experience adverse changes in cardiovascular and diabetes risk factors has never been addressed. Methodology/Principal Findings An adverse response is defined as an exercise-induced change that worsens a risk factor beyond measurement error and expected day-to-day variation. Sixty subjects were measured three times over a period of three weeks, and variation in resting systolic blood pressure (SBP) and in fasting plasma HDL-cholesterol (HDL-C), triglycerides (TG), and insulin (FI) was quantified. The technical error (TE) defined as the within-subject standard deviation derived from these measurements was computed. An adverse response for a given risk factor was defined as a change that was at least two TEs away from no change but in an adverse direction. Thus an adverse response was recorded if an increase reached 10 mm Hg or more for SBP, 0.42 mmol/L or more for TG, or 24 pmol/L or more for FI or if a decrease reached 0.12 mmol/L or more for HDL-C. Completers from six exercise studies were used in the present analysis: Whites (N = 473) and Blacks (N = 250) from the HERITAGE Family Study; Whites and Blacks from DREW (N = 326), from INFLAME (N = 70), and from STRRIDE (N = 303); and Whites from a University of Maryland cohort (N = 160) and from a University of Jyvaskyla study (N = 105), for a total of 1,687 men and women. Using the above definitions, 126 subjects (8.4%) had an adverse change in FI. Numbers of adverse responders reached 12.2% for SBP, 10.4% for TG, and 13.3% for HDL-C. About 7% of participants experienced adverse responses in two or more risk factors. Conclusions/Significance Adverse responses to regular exercise in cardiovascular and diabetes risk factors occur. Identifying the predictors of such unwarranted responses and how to prevent them will provide the foundation for personalized exercise prescription.
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Affiliation(s)
- Claude Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States of America.
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21
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Chodzko-Zajko WJ, Proctor DN, Fiatarone Singh MA, Minson CT, Nigg CR, Salem GJ, Skinner JS, Skinner JS. Exercise and Physical Activity for Older Adults. Med Sci Sports Exerc 2009; 41:1510-30. [PMID: 19516148 DOI: 10.1249/mss.0b013e3181a0c95c] [Citation(s) in RCA: 2287] [Impact Index Per Article: 152.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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22
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Adams PC, Skinner JS, Cohen M, McBride R, Fuster V. Acute coronary syndromes in the United States and United Kingdom: a comparison of approaches. The Antithrombotic Therapy in Acute Coronary Syndromes Research Group. Clin Cardiol 2009; 21:348-52. [PMID: 9595218 PMCID: PMC6656248 DOI: 10.1002/clc.4960210510] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Patients with coronary artery disease are managed differently in different countries. HYPOTHESIS These variations in patient management may affect clinical outcome, a possibility that should be taken into consideration in multicenter studies. METHODS In a binational, 3 months study of antithrombotic treatment of patients with unstable angina and non-Q-wave infarction (ATACS), we compared the experience in the four enrollment centers in the United States (US) with the three centers in the United Kingdom (UK). The 59 US patients and the 299 UK patients were similar with regard to age, rates of prior revascularization, prior positive exercise tests, medication use, and aspirin use. RESULTS US patients were more commonly women (45 vs. 28%), diabetic (30 vs. 4%), or hypertensive (52 vs. 31%), and had a prior coronary angiogram (30 vs. 18%). After enrollment, coronary angiography was performed more frequently in the US than in the UK (61 vs. 22%). Although the distribution of coronary disease was similar, revascularization without recurrent angina (19 vs. 4%, p < 0.001), or following recurrent angina (8 vs. 3%), was significantly more frequent in the US. Combined primary end points (recurrent angina, myocardial infarction, or death) did not differ between US (29%) and UK (25%) patients. CONCLUSION Therefore, international studies of acute coronary disease need to account for different treatments in different countries. These differences, in the small ATACS study, did not have a major impact on the composite primary outcome variables.
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Affiliation(s)
- P C Adams
- Department of Cardiology, Royal Victoria Infirmary, Newcastle-Upon-Tyne, U.K
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Sisson SB, Katzmarzyk PT, Rankinen T, Church TS, Rao D, Wilmore JH, Skinner JS, Leon AS, Bouchard C. Energy Expenditure during Exercise Training and Changes in Body Composition. Med Sci Sports Exerc 2008. [DOI: 10.1249/01.mss.0000321935.82344.df] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Davis PG, Robison CE, Rankinen T, Leon AS, Rao DC, Skinner JS, Wilmore JH, Bouchard C. Endurance Exercise Training and High-Molecular Weight Adiponectin: the HERITAGE Family Study. Med Sci Sports Exerc 2008. [DOI: 10.1249/01.mss.0000323177.73633.71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Spielmann N, Leon AS, Rao DC, Rice T, Skinner JS, Rankinen T, Bouchard C. Genome-wide linkage scan for submaximal exercise heart rate in the HERITAGE family study. Am J Physiol Heart Circ Physiol 2007; 293:H3366-71. [DOI: 10.1152/ajpheart.00042.2007] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The purpose of this study was to identify regions of the human genome linked to submaximal exercise heart rates in the sedentary state and in response to a standardized 20-wk endurance training program in blacks and whites of the HERITAGE Family Study. A total of 701 polymorphic markers covering the 22 autosomes were used in the genome-wide linkage scan, with 328 sibling pairs from 99 white nuclear families and 102 pairs from 115 black family units. Steady-state heart rates were measured at the relative intensity of 60% maximal oxygen uptake (HR60) and at the absolute intensity of 50 W (HR50). Baseline phenotypes were adjusted for age, sex, and baseline body mass index (BMI) and training responses (posttraining minus baseline, Δ) were adjusted for age, sex, baseline BMI, and baseline value of the phenotype. Two analytic strategies were used, a multipoint variance components and a regression-based multipoint linkage analysis. In whites, promising linkages (LOD > 1.75) were identified on 18q21-q22 for baseline HR50 (LOD = 2.64; P = 0.0002) and ΔHR60 (LOD = 2.10; P = 0.0009) and on chromosome 2q33.3 for ΔHR50 (LOD = 2.13; P = 0.0009). In blacks, evidence of promising linkage for baseline HR50 was detected with several markers within the chromosomal region 10q24-q25.3 (peak LOD = 2.43, P = 0.0004 with D10S597). The most promising regions for fine mapping in the HERITAGE Family Study were found on 2q33 for HR50 training response in whites, on 10q25-26 for baseline HR60 in blacks, and on 18q21–22 for both baseline HR50 and ΔHR60 in whites.
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Rankinen T, Church T, Rice T, Markward N, Leon AS, Rao DC, Skinner JS, Blair SN, Bouchard C. Effect of Endothelin 1 Genotype on Blood Pressure Is Dependent on Physical Activity or Fitness Levels. Hypertension 2007; 50:1120-5. [PMID: 17938376 DOI: 10.1161/hypertensionaha.107.093609] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Contributions of the DNA sequence variation at the endothelin 1 locus to the risk of hypertension and to endurance training–induced changes in blood pressure were investigated in the Aerobics Center Longitudinal Study and the Health, Risk Factors, Exercise Training and Genetics Family Study cohorts. We identified 586 normotensive control subjects and 607 incident hypertensive case subjects from the Aerobics Center Longitudinal Study cohort (all whites) who were normotensive and healthy at their first clinic visit. The case subjects were diagnosed with hypertension during an average follow-up of 9.5 years, whereas the control subjects remained normotensive. The allele and genotype frequencies of 5 endothelin 1 haplotype tagging single nucleotide polymorphisms did not differ significantly between the case and control subjects. However, we observed a significant (
P
=0.0025) interaction between the endothelin 1 rs5370 (G/T; Lys198Asn) genotype and cardiorespiratory fitness level on the risk of hypertension: among low-fit subjects, the rs5370 minor allele (T; 198Asn) was associated with higher risk of hypertension (odds ratio: 1.95; 95% CI: 1.36 to 2.81;
P
=0.0003), whereas the risk did not differ among genotypes in high-fit subjects. In the white Health, Risk Factors, Exercise Training and Genetics subjects (N=480), the rs5370 T allele was associated with blunted systolic blood pressure (
P
=0.0046) and pulse pressure (
P
=0.0016) responses to a 20-week endurance training program. The Lys198Asn variant of the endothelin 1 locus is associated with blood pressure phenotypes in whites. However, the expression of the genotype effect is modulated by physical activity or cardiorespiratory fitness level. Our study provides an illustrative example of how physical activity and fitness level modifies the associations between a candidate gene and outcome phenotype.
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Affiliation(s)
- Tuomo Rankinen
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - Timothy Church
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - Treva Rice
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - Nathan Markward
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - Arthur S. Leon
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - Dabeeru C. Rao
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - James S. Skinner
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - Steven N. Blair
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
| | - Claude Bouchard
- From the Human Genomics Laboratory (T.Rankinen, N.M., C.B.) and Preventive Medicine Laboratory (T.C.), Pennington Biomedical Research Center, Baton Rouge, La; Division of Biostatistics (T.Rice, D.C.R.) and Departments of Genetics and Psychiatry (D.C.R.), Washington University School of Medicine, St Louis, Mo; Laboratory of Physiological Hygiene and Exercise Science (A.S.L.), School of Kinesiology, University of Minnesota, Minneapolis; Department of Kinesiology (J.S.S.), Indiana University,
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Teran-Garcia M, Rankinen T, Rice T, Leon AS, Rao DC, Skinner JS, Bouchard C. Variations in the four and a half LIM domains 1 gene (FHL1) are associated with fasting insulin and insulin sensitivity responses to regular exercise. Diabetologia 2007; 50:1858-1866. [PMID: 17589823 DOI: 10.1007/s00125-007-0733-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2007] [Accepted: 04/19/2007] [Indexed: 01/09/2023]
Abstract
AIMS/HYPOTHESIS The expression of the four and a half LIM domains 1 gene (FHL1) is increased in the muscle of individuals who show an improvement in insulin sensitivity index (S(I)) after 20 weeks of exercise training. The aim of the present study was to investigate associations between three FHL1 single nucleotide polymorphisms (SNPs) and variables derived from an IVGTT, both in the sedentary state and in response to exercise training, in participants in the HERITAGE Family Study. MATERIALS AND METHODS SNPs were typed using fluorescence polarisation methodology. Analyses were performed separately by sex and in black and white individuals. RESULTS In black participants, no associations were found with any of the SNPs. In white women (n = 207), SNP rs9018 was associated with the disposition index (D(I)), which is calculated as S(I) generated from the MINMOD program (x10(-4) min(-1)[microU/ml](-1)) multiplied by acute insulin response to glucose (AIR(g); pmol/l x 10 min), and the glucose disappearance index (K(g)) training responses (p = 0.016 and p = 0.008, respectively). In white men (n = 222), all SNPs were associated with fasting glucose levels (p < or = 0.05) and SNP rs2180062 with the insulin sensitivity index (S(I)) (p = 0.04) in the sedentary state. Two SNPs were associated with fasting insulin training response. Fasting insulin decreased to a greater extent in carriers of the rs2180062 C allele (p = 0.01) and rs9018 T allele (p = 0.04). With exercise training, S(I) (x10(-4) min(-1)[microU/ml](-1): 0.68 +/- 0.20 vs -0.77 +/- 0.44, p = 0.046), D(I) (319 +/- 123 vs -528 +/- 260, p = 0.006) and K(g) (per 100 min: 0.09 +/- 0.04 vs -0.14 +/- 0.8, p = 0.03) improved more in the C allele carriers at rs2180062 than in the T allele carriers. CONCLUSIONS/INTERPRETATION Fasting insulin and S(I) responses to exercise training were associated with DNA sequence variation in FHL1 in white men. Whether these associations exist only in white men remains to be investigated.
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Affiliation(s)
- M Teran-Garcia
- Human Genomics Laboratory, Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA
| | - T Rankinen
- Human Genomics Laboratory, Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA
| | - T Rice
- Division of Biostatistics, Washington University School of Medicine, St Louis, MO, USA
| | - A S Leon
- Laboratory of Physiological Hygiene and Exercise Science, School of Kinesiology, University of Minnesota, Minneapolis, MN, USA
| | - D C Rao
- Division of Biostatistics, Washington University School of Medicine, St Louis, MO, USA
- Departments of Genetics and Psychiatry, Washington University School of Medicine, St Louis, MO, USA
| | - J S Skinner
- Department of Kinesiology, Indiana University, Bloomington, IN, USA
| | - C Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA, 70808, USA.
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Abstract
Associations between cholesteryl ester transfer protein (CETP) polymorphisms and high-density lipoprotein cholesterol (HDL-c) levels before and after 20 wk of endurance training were investigated in the HERITAGE Family Study. Plasma HDL-c, HDL2-c, HDL3-c, and apolipoprotein (apo)A1 levels were measured, and 13 CETP single nucleotide polymorphisms (SNPs) were genotyped in 265 blacks and 486 whites. Three haplotypes defined by SNPs at the −1337, −971, and −629 sites were strongly associated with baseline HDL-c levels in whites. Both C−1337T and C−629A were associated with baseline HDL-c ( P < 0.001) and apoA1 ( P < 0.01) when tested separately. However, only C−629A remained significant in a combined model. G−971A was not associated with HDL phenotypes, but showed significant interactions with C−629A ( P = 0.002) on baseline traits. Genotype-by-sex interactions were observed at the −629 locus for HDL3-c ( P = 0.004) and apoA1 ( P = 0.02) training responses in whites. In women, the −629 A/A homozygotes showed greater increases in HDL3-c ( P = 0.02) and apoA1 ( P = 0.02) levels than the other genotypes. Finally, apolipoprotein E (APOE) genotype and the CETP C−629A locus contributed independently and in additive fashion to the HDL traits, explaining 6.0–8.8% of the variance. The CETP −1337T and −629A alleles are associated with higher baseline HDL-c and apoA1 levels. The beneficial effects of endurance training on plasma HDL3-c and apoA1 levels are evident in white women homozygous for the −629A allele. The CETP and APOE genotypes account for up to 9% of the variance in HDL-c phenotypes in the HERITAGE Family Study.
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Affiliation(s)
- Nadine Spielmann
- Human Genomics Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, Louisiana 70808-4124, USA
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Abstract
Mortality from coronary heart disease has been falling in the UK since the 1970s, but remains higher than in most other Western countries. Most patients receive some treatment for secondary prevention after myocardial infarction, but not all patients are offered the most effective secondary prevention package. The recently published NICE guideline for secondary prevention in patients after myocardial infarction, summarised in this article, makes clear recommendations for management of patients after myocardial infarction, based on best available evidence. The guidelines update the 2001 NICE guideline, and have expanded and emphasised the recommendations for physical activity, dietary and other lifestyle changes, and cardiac rehabilitation, and updated the recommendations for drug therapy.
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Affiliation(s)
- J S Skinner
- Department of Cardiology, Royal Victoria Infirmary, Newcastle upon Tyne, UK.
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Affiliation(s)
- J S Skinner
- Department of Cardiology, Royal Victoria Infirmary, Newcastle upon Tyne, UK.
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Abstract
This is one of a series of BMJ summaries of new NICE guidelines, which are based on the best available evidence; they will highlight important recommendations for clinical practice, especially where uncertainty or controversy exists.
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Affiliation(s)
- J S Skinner
- Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP.
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Church TS, Earnest CP, Skinner JS, Blair SN. Effects of different doses of physical activity on cardiorespiratory fitness among sedentary, overweight or obese postmenopausal women with elevated blood pressure: a randomized controlled trial. JAMA 2007; 297:2081-91. [PMID: 17507344 DOI: 10.1001/jama.297.19.2081] [Citation(s) in RCA: 465] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT Low levels of cardiorespiratory fitness are associated with high risk of mortality, and improvements in fitness are associated with reduced mortality risk. However, a poor understanding of the physical activity-fitness dose response relation remains. OBJECTIVE To examine the effect of 50%, 100%, and 150% of the NIH Consensus Development Panel recommended physical activity dose on fitness in women. DESIGN, SETTING, AND PARTICIPANTS Randomized controlled trial of 464 sedentary, postmenopausal overweight or obese women whose body mass index ranged from 25.0 to 43.0 and whose systolic blood pressure ranged from 120.0 to 159.9 mm Hg. Enrollment took place between April 2001 and June 2005 in the Dallas, Tex, area. INTERVENTION Participants were randomly assigned to 1 of 4 groups: 102 to the nonexercise control group and 155 to the 4-kcal/kg, 104 to the 8-kcal/kg, and 103 to the 12-kcal/kg per week energy-expenditure groups for the 6-month intervention period. Target training intensity was the heart rate associated with 50% of each woman's peak Vo2. MAIN OUTCOME MEASURE The primary outcome was aerobic fitness assessed on a cycle ergometer and quantified as peak absolute oxygen consumption (Vo2abs, L/min). RESULTS The mean (SD) baseline Vo2abs values were 1.30 (0.25) L/min. The mean (SD) minutes of exercising per week were 72.2 (12.3) for the 4-kcal/kg, 135.8 (19.5) for the 8-kcal/kg, and 191.7 (33.7) for the 12-kcal/kg per week exercise groups. After adjustment for age, race/ethnicity, weight, and peak heart rate, the exercise groups increased their Vo2abs compared with the control group by 4.2% in the 4-kcal/kg, 6.0% in the 8-kcal/kg, and 8.2% in the 12-kcal/kg per week groups (P<.001 for each vs control; P for trend <.001). There was no treatment x subgroup interaction for age, body mass index, weight, baseline Vo2abs, race/ethnicity, or baseline hormone therapy use. There were no significant changes in systolic or diastolic blood pressure values from baseline to 6 months in any of the exercise groups vs the control group. CONCLUSION In this study, previously sedentary, overweight or obese postmenopausal women experienced a graded dose-response change in fitness across levels of exercise training. TRIAL REGISTRATION clinicaltrials.gov Identifier: NCT00011193.
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Affiliation(s)
- Timothy S Church
- Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge 70808-4124, USA.
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Richardson JJ, Lobser GJ, Welk GJ, Skinner JS, Brage S. Using Stride-based Accelerometry to Predict Locomotor Speed and Energy Expenditure (EE). Med Sci Sports Exerc 2007. [DOI: 10.1249/01.mss.0000273204.93558.f0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Feitosa ME, Rice T, Borecki IB, Rankinen T, Leon AS, Skinner JS, Després JP, Blangero J, Bouchard C, Rao DC. Pleiotropic QTL on chromosome 12q23-q24 influences triglyceride and high-density lipoprotein cholesterol levels: the HERITAGE family study. Hum Biol 2007; 78:317-27. [PMID: 17216804 DOI: 10.1353/hub.2006.0043] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To determine whether a common quantitative trait locus (QTL) influences the variation of fasting triglyceride (TG) and high-density lipoprotein cholesterol (HDL-C) levels, we used a bivariate multipoint linkage analysis with 654 polymorphic markers in 99 white and 101 black families. The phenotypes were investigated under two conditions: at baseline and after a 20-week exercise training intervention. A maximum genome-wide bivariate LOD score of 3.0 (p = 0.00010) was found on chromosome 12q23-q24, located within the IGF1 gene (insulin-like growth factor 1, at 107 cM) for TG and HDL-C at baseline in whites. This bivariate linkage peak is considerably higher than the univariate linkage results at the same chromosome location for either trait (for TG, LOD = 2.07, p = 0.00108; for HDL-C, LOD = 2.04, p = 0.00101). The genetic correlations between baseline TG and HDL-C levels were -0.14 for the residual and -0.33 for the QTL components. Moreover, association analysis showed that TG, HDL-C, and IGF1 are significantly associated (p = 0.04). In conclusion, these results suggest that a QTL on chromosome 12q23-q24 influences the variation of plasma TG and HDL-C levels. Further investigation should confirm whether IGF1 or another nearby gene is responsible for the concomitant variation in TG and HDL-C levels.
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Affiliation(s)
- Mary E Feitosa
- Division of Statistical Genomics in the Center for Genome Sciences, Washington University School of Medicine, Saint Louis, MO, USA
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Hautala AJ, Leon AS, Skinner JS, Rao DC, Bouchard C, Rankinen T. Peroxisome proliferator-activated receptor-delta polymorphisms are associated with physical performance and plasma lipids: the HERITAGE Family Study. Am J Physiol Heart Circ Physiol 2007; 292:H2498-505. [PMID: 17259439 DOI: 10.1152/ajpheart.01092.2006] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We tested the hypothesis that peroxisome proliferator-activated receptor-delta (PPARdelta) gene polymorphisms are associated with cardiorespiratory fitness and plasma lipid responses to endurance training. Associations between the PPARdelta exon 4 +15 C/T and exon 7 +65 A/G polymorphisms and maximal exercise capacity and plasma lipid responses to 20 wk of endurance training were investigated in healthy white (n = 477) and black (n = 264) subjects. In black subjects, the exon 4 +15 C/C homozygotes showed a smaller training-induced increase in maximal oxygen consumption (P = 0.028) than the C/T and T/T genotypes. Similarly, a lower training response in maximal power output was observed in the exon 4 +15 C/C homozygotes (P = 0.005) compared with the heterozygotes and the T/T homozygotes in black subjects, and a similar trend was evident in white subjects (P = 0.087). In white subjects, baseline apolipoprotein A-1 (Apo A-1)levels were higher in the exon 4 +15 C/C (P = 0.011) and exon 7 +65 G/G (P = 0.05) genotypes compared with those in the other genotypes. In white subjects, exon 4 +15 C/C (P = 0.0025) and exon 7 +65 G/G (P = 0.011) genotypes showed significantly greater increases in plasma high-density lipoprotein-cholesterol (HDL-C) levels with endurance training than in the other genotypes, whereas in black subjects the exon 4 +15 CC homozygotes tended to increase (P = 0.057) their Apo A-1 levels more than the T allele carriers. DNA sequence variation in the PPARdelta locus is a potential modifier of changes in cardiorespiratory fitness and plasma HDL-C in healthy individuals in response to regular exercise.
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Affiliation(s)
- Arto J Hautala
- Pennington Biomedical Research Center, Human Genomics Laboratory, Louisiana State University System, 6400 Perkins Road, Baton Rouge, LA 70808-4124, USA
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Blache D, Lussier-Cacan S, Gagnon J, Leon AS, Rao DC, Skinner JS, Wilmore JH, Rankinen T, Bouchard C, Davignon J. Effect of exercise training on in vitro LDL oxidation and free radical-induced hemolysis: the HERITAGE Family Study. Antioxid Redox Signal 2007; 9:123-30. [PMID: 17115891 DOI: 10.1089/ars.2007.9.123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Oxidant stress and overproduction of reactive oxygen species (ROS) contribute to the development of cardiovascular disease. Oxidative modifications of low-density lipoproteins (LDL) are thought to play an early and critical role in atherogenesis. LDL oxidation can be reproduced in vitro, but results usually show a large interindividual variation not entirely explained by the environment. Free radical-induced hemolysis is also proposed to reveal the overall antioxidant capacity. The roles of genetic factors and exercise on the variability of both measures were investigated. The study was conducted in 146 healthy individuals from 28 families participating in a 20-week exercise-training program. In addition to important biological and environmental influences on variation, significant familial aggregation was detected in all oxidation measures. Exercise did not significantly modify the LDL oxidation parameters, but significantly increased resistance was observed in the free radical-induced hemolysis, especially in women, this effect was not observed in smokers. In total, the findings suggest the presence of familial effects in the response to ex vivo oxidation. Further, smoking negates the beneficial effect of exercise training on erythrocyte resistance to free radical-induced hemolysis. These observations emphasize the importance of context in the evaluation of exercise and oxidant stress.
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Affiliation(s)
- Denis Blache
- INSERM U 498, Biochimie des Lipoprotéines et Interactions Vasculaires, and Faculté de Médecine, Université de Bourgogne, Dijon, France.
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37
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Turley KR, Stanforth PR, Rankinen T, Bouchard C, Leon AS, Rao DC, Skinner JS, Wilmore JH, Spears FM. Scaling Submaximal Exercise Cardiac Output and Stroke Volume: The HERITAGE Family Study. Int J Sports Med 2006; 27:993-9. [PMID: 16739086 DOI: 10.1055/s-2006-923835] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study investigated different methods of scaling submaximal cardiac output (Q) and stroke volume (SV) to best normalize for body size (body surface area [BSA], height [Ht], weight [Wt], and fat-free mass [FFM]). Q and SV were measured at both an absolute (50 W) and a relative power output (60 % of VO2max) in 337 men and 422 women, 17 to 65 years of age. Traditional ratio scaling was examined in addition to allometric scaling, where scaling exponents ( B) were determined for each body size variable (x) that best normalized the physiological outcome variables (y) for body size (y = ax(b)). With ratio scaling, regardless of the body size variable (x = BSA, Ht, Wt, FFM), there was no evidence of a linear relationship between x and y (y = Q or SV). A linear relationship is a necessary condition for appropriate normalization. Further, when ratio-scaled variables (e.g., Q/BSA) were correlated to the body size variable (e.g., BSA) by which they were scaled, significant (p <or= 0.05) relationships still existed for BSA, Ht, Wt, and FFM. Thus, ratio scaling did not meet either criteria for normalizing Q and SV for body size. In contrast, when allometrically-derived scaling exponents were used to normalize Q and SV (e.g., Q/BSA(b)), the resulting scaled values were uncorrelated (i.e., size-independent) with BSA, Ht, Wt, or FFM. These results were independent of age, sex or race. In summary, ratio scaling did not appropriately normalize Q and SV for differences in body size, while allometric scaling did result in size-independent values. Thus, individually-derived allometric exponents should be applied to body size variables to most appropriately adjust Q and SV for body size.
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Affiliation(s)
- K R Turley
- Department of Kinesiology, Harding University, Searcy, AR, USA.
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Okura T, Rankinen T, Gagnon J, Lussier-Cacan S, Davignon J, Leon AS, Rao DC, Skinner JS, Wilmore JH, Bouchard C. Effect of regular exercise on homocysteine concentrations: the HERITAGE Family Study. Eur J Appl Physiol 2006; 98:394-401. [PMID: 17016702 DOI: 10.1007/s00421-006-0294-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/16/2006] [Indexed: 10/24/2022]
Abstract
We investigated whether regular aerobic exercise could affect plasma total homocysteine (tHcy), and whether there were sex-related or racial differences in tHcy changes. Data were available for 816 black and white men and women, aged 17-65 years, 711 of whom completed a 20 week aerobic exercise training program. The tHcy concentration was measured in frozen plasma samples by an HPLC method. In Blacks, tHcy did not change with exercise training [men -0.5 (SD 3.7) micromol/l, women 0.0 (2.2) micromol/l) but increased significantly in Whites (men +0.3 (1.7) micromol/l, women +0.2 (1.6) micromol/l). No sex-related differences were found in either racial group. Changes in tHcy correlated negatively with baseline homocysteine (r = -0.40, P < 0.0001). Homocysteine levels of the "High" (hyperhomocysteinemia) (>or=15 micromol/l) group (n = 30) decreased significantly with regular aerobic exercise from 23.1 (12.1) to 19.6 (7.6) micromol/l. Homocysteine levels of the "Normal" group increased slightly from 8.2 +/- 2.2 to 8.5 +/- 2.4 micromol/l. Men exhibit racial differences for tHcy responses to exercise training. Regular aerobic exercise has favorable effects on individuals with hyperhomocysteinemia, but tHcy slightly increased in individuals within the normal range.
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Affiliation(s)
- Tomohiro Okura
- Human Genomics Laboratory, Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA
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An P, Rice T, Rankinen T, Leon AS, Skinner JS, Wilmore JH, Bouchard C, Rao DC. Genome-wide scan to identify quantitative trait loci for baseline resting heart rate and its response to endurance exercise training: the HERITAGE Family Study. Int J Sports Med 2006; 27:31-6. [PMID: 16388439 DOI: 10.1055/s-2005-837628] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Evidence of a genetic component for resting heart rate (RHR) has been found. Quantitative trait loci (QTLs) for baseline RHR have been reported, but not for RHR training response. It is of interest to identify QTLs that may harbor genes influencing RHR variation at baseline and in response to regular exercise training. Here, a multipoint variance components linkage scan using 654 markers was performed to search for QTLs that influence RHR adjusted for several covariates at baseline and in response to 20 weeks of endurance training (post-training minus baseline) in 99 White and 127 Black families in the HERITAGE Family Study. Potentially interesting linkages were revealed on 4 q and 11 p for baseline RHR, and on 1 q and 21 q for RHR training response in Whites. The QTLs on 2 q, 6 q, 7 q, 12 q, 14 q, and 15 q for baseline RHR, and on 3 p, 20 p and 21 q for RHR training response were found in Blacks. Promising linkages (lod scores >or= 1.75, p <or= 0.0023) involved 11 p for baseline RHR in Whites and 3 p for RHR training response in Blacks, which did not replicate across races. Interestingly in this study, the linkage evidence on 11 p at the SUR locus was somewhat enhanced (lod score went up from 1.7 to 2.0) in a prehypertensive (BP >or= 135/80 mm Hg) subset of 40 White families suggesting a pleiotropic gene for BP and RHR with interactions. In conclusion, among QTLs on 1 q, 2 p, 3 p, 4 q, and 11 p that replicated across subsamples and studies, 11 p is most promising for dense mapping and association studies in HERITAGE and other cohorts.
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Affiliation(s)
- P An
- Division of Biostatistics, Washington University School of Medicine, St. Louis, Missouri, USA.
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40
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Lakka TA, Rankinen T, Rice T, Leon AS, Rao DC, Skinner JS, Bouchard C. Quantitative trait locus on chromosome 20q13 for plasma levels of C-reactive protein in healthy whites: the HERITAGE Family Study. Physiol Genomics 2006; 27:103-7. [PMID: 16822830 DOI: 10.1152/physiolgenomics.00054.2005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
C-reactive protein (CRP) is a sensitive marker of systemic low-grade inflammation. Increased plasma levels of CRP predict the risk of cardiovascular and metabolic diseases. Although genetic factors account for 30-40% of individual differences in plasma CRP levels, genomic regions contributing to CRP levels remain unknown. We performed a genome-wide linkage scan for plasma CRP levels in healthy whites from the HERITAGE Family Study. CRP was measured with a high-sensitivity assay. Multipoint linkage analyses were performed in 280 sibling pairs with 654 markers using regression and variance components-based methods. Data were adjusted for independent correlates of plasma CRP. We showed the strongest evidence of linkage for plasma CRP levels on chromosome 20q13. Markers which gave suggestive linkages in this region were D20S52 [logarithm of odds (LOD) score 3.18, P = 0.00006], D20S857 (LOD score 2.87, P = 0.00014), D20S869 (LOD score 2.75, P = 0.0002), D20S480 (LOD score 2.59, P = 0.0003), D20S501 (LOD score 2.55, P = 0.0003), D20S840 (LOD score 2.18, P = 0.0008), and D20S876 (LOD score 2.07, P = 0.001). We also detected suggestive linkage on chromosome 5p13 for marker D5S1470 (LOD score 2.23, P = 0.0007). Chromosome 20q13 may contribute to plasma CRP levels in healthy whites. This region contains genes that are important in the inflammatory process and may play a role in the development of chronic inflammatory diseases. The present findings may be useful in the ongoing effort to search for genes contributing to inflammation and to identify individuals at an increased risk of chronic inflammatory diseases.
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Affiliation(s)
- Timo A Lakka
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA.
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Davis PG, Rankinen T, Leon AS, Rao DC, Skinner JS, Wilmore JH, Bouchard C. Effect of Endurance Exercise Training on Serum Adiponectin Concentration. Med Sci Sports Exerc 2006. [DOI: 10.1249/00005768-200605001-01081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Szucs P, Karsai I, von Zitzewitz J, Mészáros K, Cooper LLD, Gu YQ, Chen THH, Hayes PM, Skinner JS. Positional relationships between photoperiod response QTL and photoreceptor and vernalization genes in barley. Theor Appl Genet 2006; 112:1277-85. [PMID: 16489429 DOI: 10.1007/s00122-006-0229-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Accepted: 01/15/2006] [Indexed: 05/06/2023]
Abstract
Winterhardiness has three primary components: photoperiod (day length) sensitivity, vernalization response, and low temperature tolerance. Photoperiod and vernalization regulate the vegetative to reproductive phase transition, and photoperiod regulates expression of key vernalization genes. Using two barley mapping populations, we mapped six individual photoperiod response QTL and determined their positional relationship to the phytochrome and cryptochrome photoreceptor gene families and the vernalization regulatory genes HvBM5A, ZCCT-H, and HvVRT-2. Of the six photoreceptors mapped in the current study (HvPhyA and HvPhyB to 4HS, HvPhyC to 5HL, HvCry1a and HvCry2 to 6HS, and HvCry1b to 2HL), only HvPhyC coincided with a photoperiod response QTL. We recently mapped the candidate genes for the 5HL VRN-H1 (HvBM5A) and 4HL VRN-H2 (ZCCT-H) loci, and in this study, we mapped HvVRT-2, the barley TaVRT-2 ortholog (a wheat flowering repressor regulated by vernalization and photoperiod) to 7HS. Each of these three vernalization genes is located in chromosome regions determining small photoperiod response QTL effects. HvBM5A and HvPhyC are closely linked on 5HL and therefore are currently both positional candidates for the same photoperiod effect. The coincidence of photoperiod-responsive vernalization genes with photoperiod QTL suggests vernalization genes should also be considered candidates for photoperiod effects.
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Affiliation(s)
- P Szucs
- Department of Crop and Soil Science, Oregon State University, 253 Crop Science Building, Corvallis, OR 97331, USA
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Lakka HM, Lakka TA, Rankinen T, Rice T, Rao DC, Leon AS, Skinner JS, Bouchard C. The TNF-α G-308A polymorphism is associated with C-reactive protein levels: The HERITAGE Family Study. Vascul Pharmacol 2006; 44:377-83. [PMID: 16581306 DOI: 10.1016/j.vph.2006.02.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2005] [Accepted: 02/06/2006] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Pro-inflammatory cytokines, such as tumor necrosis factor alpha (TNF-alpha), stimulate the release of C-reactive protein (CRP). We investigated the association between the TNF-alpha G-308A polymorphism and plasma CRP levels. METHODS Subjects were 456 White (225 men, 231 women) and 232 Black (83 men, 149 women) healthy adults who underwent a 20-week standardized exercise program in the HERITAGE Family Study. The TNF-alpha gene promoter polymorphism was determined using PCR amplification followed by NcoI digestion. Plasma CRP was measured using a high-sensitivity assay. RESULTS Genotype frequencies were in Hardy-Weinberg equilibrium. After adjustment for age, smoking, alcohol consumption, maximal oxygen uptake and, in women, hormone use, the AA homozygotes for the G-308A polymorphism had higher baseline CRP levels than other genotypes in White and Black men (P<0.001 and P = 0.044, respectively) and in Black women (P = 0.032). Body mass index partly explained these associations in Blacks. The exercise program results provided further evidence for an association with the polymorphism. Among those with high CRP at baseline (> or = 3.0 mg/L), regular exercise decreased CRP less in AA homozygotes than in other genotypes (P = 0.043). CONCLUSION The AA genotype of the TNF-alpha G-308A polymorphism is associated with higher plasma CRP levels and less favorable CRP response to regular exercise.
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Affiliation(s)
- Hanna-Maaria Lakka
- Pennington Biomedical Research Center, Louisiana State University, 6400 Perkins Road, Baton Rouge, Louisiana 70808-4124, USA.
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Spielmann N, Rankinen T, Rice T, Leon AS, Rao DC, Skinner JS, Bouchard C. CETP C>->−629>A Genotypes and HDL-Cholesterol Phenotypes in the HERITAGE Family Study. Med Sci Sports Exerc 2006. [DOI: 10.1249/00005768-200605001-02419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tondelli A, Francia E, Barabaschi D, Aprile A, Skinner JS, Stockinger EJ, Stanca AM, Pecchioni N. Mapping regulatory genes as candidates for cold and drought stress tolerance in barley. Theor Appl Genet 2006; 112:445-54. [PMID: 16315028 DOI: 10.1007/s00122-005-0144-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2005] [Accepted: 10/24/2005] [Indexed: 05/05/2023]
Abstract
Cereal crop yield is greatly affected in many growing areas by abiotic stresses, mainly low temperature and drought. In order to find candidates for the tolerance genes for these stresses, 13 genes encoding for transcription factors and upstream regulators were screened by amplification and SSCP on six parental genotypes of three barley mapping populations ('Nure' x 'Tremois', 'Proctor' x 'Nudinka', and 'Steptoe' x 'Morex'), and mapped as newly developed STS, SNP, and SSCP markers. A new consensus function map was then drawn using the three maps above, including 16 regulatory candidate genes (CGs). The positions of barley cold and drought tolerance quantitative trait loci (QTLs) presently described in the literature were added to the consensus map to find positional candidates from among the mapped genes. A cluster of six HvCBF genes co-mapped with the Fr-H2 cold tolerance QTL, while no QTLs for the same trait were positioned on chromosome 7H, where two putative barley regulators of CBF expression, ICE1 and FRY1, found by homology search, were mapped in this work. These observations suggest that CBF gene(s) themselves, rather than their two regulators, are at present the best candidates for cold tolerance. Four out of 12 drought tolerance QTLs of the consensus map are associated with regulatory CGs, on chromosomes 2H, 5H, and 7H, and two QTLs with effector genes, on chromosomes 5H and 6H. The results obtained could be used to guide MAS applications, allowing introduction into an ideal genotype of favourable alleles of tolerance QTLs.
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Affiliation(s)
- A Tondelli
- CRA Istituto Sperimentale per la Cerealicoltura, Sezione di Fiorenzuola d'Arda (PC), 29017 Fiorenzuola d'Arda, Italy
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An P, Borecki IB, Rankinen T, Després JP, Leon AS, Skinner JS, Wilmore JH, Bouchard C, Rao DC. Evidence of major genes for plasma HDL, LDL cholesterol and triglyceride levels at baseline and in response to 20 weeks of endurance training: the HERITAGE Family Study. Int J Sports Med 2005; 26:414-9. [PMID: 16037881 DOI: 10.1055/s-2004-821160] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
This study assessed major gene effects for baseline HDL-C, LDL-C, TG, and their training responses (post-training minus baseline) in 527 individuals from 99 White families and 326 individuals from 113 Black families in the HERITAGE Family Study. The baseline phenotypes were adjusted for the effects of age and BMI, and the training response phenotypes were adjusted for the effects of age, BMI, and their respective baseline values, within each of the sex-by-generation-by-race groups, prior to genetic analyses. In Whites, we found that LDL-C at baseline and HDL-C training response were under influence of major recessive genes (accounting for 2--30 % of the variance) and multifactorial (polygenic and familial environmental) effects. Interactions of these major genes with sex, age, and BMI were tested, and found to be nonsignificant. In Blacks, we found that baseline HDL-C was influenced by a major dominant gene without a multifactorial component. This major gene effect accounted for 45 % of the variance, and exhibited no significant genotype-specific interactions with age, sex, and BMI. Evidence of major genes for the remaining phenotypes at baseline and in response to endurance training were not found in both races, though some were influenced by major effects that did not follow Mendelian expectations or were with ambiguous transmission from parents to offspring. In summary, major gene effects that influence baseline plasma HDL-C and LDL-C levels as well as changes in HDL-C levels in response to regular exercise were detected in the current study.
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Affiliation(s)
- P An
- Division of Biostatistics, Washington University School of Medicine, St. Louis, Missouri 63110-1093, USA.
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Tondelli A, Francia E, Barabaschi D, Aprile A, Skinner JS, Stockinger EJ, Stanca AM, Pecchioni N. Mapping regulatory genes as candidates for cold and drought stress tolerance in barley. Theor Appl Genet 2005. [PMID: 16315028 DOI: 10.1007/s00122‐005‐0144‐7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Cereal crop yield is greatly affected in many growing areas by abiotic stresses, mainly low temperature and drought. In order to find candidates for the tolerance genes for these stresses, 13 genes encoding for transcription factors and upstream regulators were screened by amplification and SSCP on six parental genotypes of three barley mapping populations ('Nure' x 'Tremois', 'Proctor' x 'Nudinka', and 'Steptoe' x 'Morex'), and mapped as newly developed STS, SNP, and SSCP markers. A new consensus function map was then drawn using the three maps above, including 16 regulatory candidate genes (CGs). The positions of barley cold and drought tolerance quantitative trait loci (QTLs) presently described in the literature were added to the consensus map to find positional candidates from among the mapped genes. A cluster of six HvCBF genes co-mapped with the Fr-H2 cold tolerance QTL, while no QTLs for the same trait were positioned on chromosome 7H, where two putative barley regulators of CBF expression, ICE1 and FRY1, found by homology search, were mapped in this work. These observations suggest that CBF gene(s) themselves, rather than their two regulators, are at present the best candidates for cold tolerance. Four out of 12 drought tolerance QTLs of the consensus map are associated with regulatory CGs, on chromosomes 2H, 5H, and 7H, and two QTLs with effector genes, on chromosomes 5H and 6H. The results obtained could be used to guide MAS applications, allowing introduction into an ideal genotype of favourable alleles of tolerance QTLs.
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Affiliation(s)
- A Tondelli
- CRA Istituto Sperimentale per la Cerealicoltura, Sezione di Fiorenzuola d'Arda (PC), 29017 Fiorenzuola d'Arda, Italy
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Loos RJF, Rankinen T, Rice T, Rao DC, Leon AS, Skinner JS, Bouchard C, Argyropoulos G. Two ethnic-specific polymorphisms in the human Agouti-related protein gene are associated with macronutrient intake. Am J Clin Nutr 2005; 82:1097-101. [PMID: 16280444 DOI: 10.1093/ajcn/82.5.1097] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The Agouti-related protein (AGRP), an appetite modulator, induces hyperphagia when administered intracerebroventricularly or when overexpressed in transgenic mice. Exogenous administration of AGRP in rodents predisposes to high fat and high sugar intakes. OBJECTIVE The objective was to examine the potential associations of 2 ethnic-specific polymorphisms in the AGRP gene (Ala67Thr in whites and -38C>T in blacks) in the Health, Risk Factors, Exercise Training, and Genetics (HERITAGE) Family Study. DESIGN We examined the effect of the 2 polymorphisms in the AGRP gene on self-reported macronutrient intakes in 478 white and 272 black participants in the HERITAGE Family Study. RESULTS Both AGRP polymorphisms showed a significant association with energy intake. In whites, a smaller proportion of total energy was derived from fat by the Ala67Thr heterozygotes (mean +/- SEM: 29.4 +/- 0.7%) than by the Ala67Ala homozygotes (31.5 +/- 0.5%; P = 0.009), mainly because of a lower intake of saturated (P = 0.06) and monounsaturated (P = 0.01) fats by the Ala67Thr heterozygotes. The percentage of energy from carbohydrates was 2.6% greater in the Ala67Thr heterozygotes (55.1 +/- 1.1%) than in the Ala67Ala homozygotes (52.5 +/- 0.6%; P = 0.03). In blacks, protein intake was associated with the -38C>T promoter polymorphism. T/T homozygotes had a significantly lower protein intake than did the C-allele carriers (C/C: 16.8 +/- 0.4%; C/T: 17.2 +/- 0.2%; T/T: 15.4 +/- 0.7%; P = 0.04). No significant differences in total energy and alcohol intakes existed between genotype groups in blacks or whites. CONCLUSIONS The present study suggests that 2 ethnic-specific AGRP variants, previously shown to be associated with leanness in the HERITAGE Family Study, are also associated with macronutrient intake.
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Affiliation(s)
- Ruth J F Loos
- Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
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James RR, Skinner JS. PCR diagnostic methods for Ascosphaera infections in bees. J Invertebr Pathol 2005; 90:98-103. [PMID: 16214164 DOI: 10.1016/j.jip.2005.08.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2005] [Revised: 07/25/2005] [Accepted: 08/05/2005] [Indexed: 10/25/2022]
Abstract
Fungi in the genus Ascosphaera are the causative agents of chalkbrood, a major disease affecting bee larval viability. Identification of individual Ascosphaera species based on morphological features has been difficult due to a lack of distinguishing characteristics. Most identifications are based on the size and shape of the ascomata, spore balls and conidia. Unfortunately, much overlap occurs in the size of these structures, and some Ascosphaera species will not produce sexual structures in vitro. We report a quick and reliable diagnostic method for identifying Ascosphaera infections in Megachile bees (leafcutting bees) using PCR markers that employ genus-specific primers for Ascosphaera, and species-specific primers for species known to be associated with Megachile spp. Using these methods, species identifications can be performed directly on bees, including asymptomatic individuals. Furthermore, the PCR markers can detect co-infections of multiple Ascosphaera species in a single host. We also identified a marker for Ascosphaera apis, the predominant cause of chalkbrood in Apis mellifera, the honey bee. Our diagnostic methods eliminate the need for culturing samples, and could be used to process a large number of field collected bee larvae.
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Affiliation(s)
- R R James
- USDA-ARS Bee Biology and Systematics Laboratory, Logan, UT, USA.
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