title: Effects of heated hydrotherapy on muscle HSP70 and glucose metabolism in old and young vervet monkeys.
abstract: Increasing heat shock protein 70 (HSP70) in aged and/or insulin-resistant animal models confers benefits to healthspan and lifespan. Heat application to increase core temperature induces HSPs in metabolically important tissues, and preliminary human and animal data suggest that heated hydrotherapy is an effective method to achieve increased HSPs. However, safety concerns exist, particularly in geriatric medicine where organ and cardiovascular disease commonly will preexist. We evaluated young vervet monkeys compared to old, insulin-resistant vervet monkeys (Chlorocebus aethiops sabaeus) in their core temperatures, glucose tolerance, muscle HSP70 level, and selected safety biomarkers after 10 sessions of hot water immersions administered twice weekly. Hot water immersion robustly induced the heat shock response in muscles. We observed that heat-treated old and young monkeys have significantly higher muscle HSP70 than control monkeys and treatment was without significant adverse effects on organ or cardiovascular health. Heat therapy improved pancreatic responses to glucose challenge and tended to normalize glucose excursions. A trend for worsened blood pressure and glucose values in the control monkeys and improved values in heat-treated monkeys were seen to support further investigation into the safety and efficacy of this intervention for metabolic syndrome or diabetes in young or old persons unable to exercise.
authors.affiliation: Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA. kkavanag@wakehealth.edu.
authors.forename: Kylie
authors.initials: K
authors.lastname: Kavanagh
authors.affiliation: Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA.
authors.forename: Ashely T
authors.initials: AT
authors.lastname: Davis
authors.affiliation: Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA.
authors.forename: Kurt A
authors.initials: KA
authors.lastname: Jenkins
authors.affiliation: Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA.
authors.forename: D Mickey
authors.initials: DM
authors.lastname: Flynn
mesh_terms: D000375:Aging / Q000378:metabolism*; D000818:Animals; D019540:Area Under Curve; D015415:Biomarkers / Q000378:metabolism; D002319:Cardiovascular System / Q000378:metabolism; D002522:Chlorocebus aethiops; D005215:Fasting / Q000097:blood; D005947:Glucose / Q000378:metabolism*; D005951:Glucose Tolerance Test; D018840:HSP70 Heat-Shock Proteins / Q000378:metabolism*; D006358:Hot Temperature; D006875:Hydrotherapy; D009132:Muscles / Q000378:metabolism*
chemical_list: D015415:Biomarkers; D018840:HSP70 Heat-Shock Proteins; D005947:Glucose
keywords: Glucose metabolism; Heat shock protein 70; Heat therapy; Muscle