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Ransey E, Brookens S, Beasley HK, Marshall A, Marlin BJ, Rodriguez-Aliaga P, Headley CA, Wanjalla C, Vazquez AD, Murray S, Damo S, Taabazuing CY, Hinton A. A practical guide to graduate school interviewing for historically excluded individuals. Am J Physiol Heart Circ Physiol 2023; 324:H786-H790. [PMID: 37027327 PMCID: PMC10191121 DOI: 10.1152/ajpheart.00123.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/03/2023] [Accepted: 04/03/2023] [Indexed: 04/08/2023]
Affiliation(s)
- Elizabeth Ransey
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina, United States
| | - Shawna Brookens
- Department of Pharmacology, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Heather K Beasley
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee, United States
| | - Andrea Marshall
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee, United States
| | - Bianca J Marlin
- Mortimer B. Zuckerman Mind Brain and Behavior Institute, Columbia University, New York, New York, United States
- Department of Psychology, Columbia University, New York, New York, United States
- Department of Neuroscience, Columbia University, New York, New York, United States
| | | | - Colwyn Ansel Headley
- Department of Cardiovascular Medicine, Stanford University, Stanford, California, United States
| | - Celestine Wanjalla
- Division of Infectious Diseases, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States
| | - Arnaldo Diaz Vazquez
- Department of Biomedical Sciences, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Sandra Murray
- Department of Cell Biology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States
| | - Steven Damo
- Department of Life and Physical Sciences, Fisk University, Nashville, Tennessee, United States
- Center for Structural Biology, Vanderbilt University, Nashville, Tennessee, United States
| | - Cornelius Y Taabazuing
- Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Antentor Hinton
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee, United States
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Butenas ALE, Copp SW, Hageman KS, Poole DC, Musch TI. Effects of comorbid type II diabetes mellitus and heart failure on rat hindlimb and respiratory muscle blood flow during treadmill exercise. J Appl Physiol (1985) 2023; 134:846-857. [PMID: 36825642 PMCID: PMC10042612 DOI: 10.1152/japplphysiol.00770.2022] [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] [Received: 12/20/2022] [Revised: 02/10/2023] [Accepted: 02/17/2023] [Indexed: 02/25/2023] Open
Abstract
In rats with type II diabetes mellitus (T2DM) compared with nondiabetic healthy controls, muscle blood flow (Q̇m) to primarily glycolytic hindlimb muscles and the diaphragm muscle are elevated during submaximal treadmill running consequent to lower skeletal muscle mass, a finding that held even when muscle mass was normalized to body mass. In rats with heart failure with reduced ejection fraction (HF-rEF) compared with healthy controls, hindlimb Q̇m was lower, whereas diaphragm Q̇m is elevated during submaximal treadmill running. Importantly, T2DM is the most common comorbidity present in patients with HF-rEF, but the effect of concurrent T2DM and HF-rEF on limb and respiratory Q̇m during exercise is unknown. We hypothesized that during treadmill running (20 m·min-1; 10% incline), hindlimb and diaphragm Q̇m would be higher in T2DM Goto-Kakizaki rats with HF-rEF (i.e., HF-rEF + T2DM) compared with nondiabetic Wistar rats with HF-rEF. Ejection fractions were not different between groups (HF-rEF: 30 ± 5; HF-rEF + T2DM: 28 ± 8%; P = 0.617), whereas blood glucose was higher in HF-rEF + T2DM (209 ± 150 mg/dL) compared with HF-rEF rats (113 ± 28 mg/dL; P = 0.040). Hindlimb muscle mass normalized to body mass was lower in rats with HF-rEF + T2DM (36.3 ± 1.6 mg/g) than in nondiabetic HF-rEF counterparts (40.3 ± 2.7 mg/g; P < 0.001). During exercise, Q̇m was elevated in rats with HF-rEF + T2DM compared with nondiabetic counterparts to the hindlimb (HF-rEF: 100 ± 28; HF-rEF + T2DM: 139 ± 23 mL·min-1·100 g-1; P < 0.001) and diaphragm (HF-rEF: 177 ± 66; HF-rEF + T2DM: 215 ± 93 mL·min-1·100g-1; P = 0.035). These data suggest that the pathophysiological consequences of T2DM on hindlimb and diaphragm Q̇m during treadmill running in the GK rat persist even in the presence of HF-rEF.NEW & NOTEWORTHY Herein, we demonstrate that rats comorbid with heart failure with reduced ejection fraction (HF-rEF) and type II diabetes mellitus (T2DM) have a higher hindlimb and respiratory muscle blood flow during submaximal treadmill running (20 m·min-1; 10% incline) compared with nondiabetic HF-rEF counterparts. These data may carry important clinical implications for roughly half of all patients with HF-rEF who present with T2DM.
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Affiliation(s)
- Alec L E Butenas
- Department of Kinesiology, Kansas State University, Manhattan, Kansas, United States
| | - Steven W Copp
- Department of Kinesiology, Kansas State University, Manhattan, Kansas, United States
| | - K Sue Hageman
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas, United States
| | - David C Poole
- Department of Kinesiology, Kansas State University, Manhattan, Kansas, United States
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas, United States
| | - Timothy I Musch
- Department of Kinesiology, Kansas State University, Manhattan, Kansas, United States
- Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas, United States
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