TY - JOUR
T1 - Repetitive progressive thermal preconditioning hinders thrombosis by reinforcing phosphatidylinositol 3-kinase/Akt-dependent heat-shock protein/endothelial nitric oxide synthase signaling
AU - Li, Ping Chia
AU - Yang, Chih Ching
AU - Hsu, Shih Ping
AU - Chien, Chiang Ting
PY - 2012/7
Y1 - 2012/7
N2 - Objective: We compared the effects of modified progressive thermal preconditioning (PTP) and whole-body thermal preconditioning (TP) on stress responses, oxidative stress biomarkers, and arterial thrombosis formation, and explored their possible actions through phosphatidylinositol 3-kinase (PI3K)/Akt-dependent heat-shock protein (Hsp)/endothelial nitric oxide synthase (eNOS) pathways. Methods: We divided four groups of 249 male Wistar rats into nonimmersed controls, TP, and one (1-PTP) and three consecutive cycles (3-PTP) of PTP in a 42°C water bath. We evaluated the stress responses, including hemodynamics, total energy transfer, endoplasmic reticulum (ER) stress marker glucose-regulated protein (GRP78), and blood reactive oxygen species level during TP or PTP treatment. We compared 1-PTP, 3-PTP, or TP effects on oxidative stress, intercellular adhesion molecule 1 (ICAM-1), Hsp70, tissue plasminogen activator (t-PA) and plasminogen activator inhibitor type 1 (PAI-1) activity, and vascular phosphorylated Akt (p-Akt) and eNOS (p-eNOS) expressions in a model of topical ferric chloride (FeCl3)-induced carotid artery thrombosis. Results: PTP significantly (P <.05) induced less hemodynamic fluctuations, total energy transfer, ER, and oxidative stress than TP did. After 24 or 72 hours of treatment, 1-PTP, 3-PTP, and TP significantly (P <.05) elevated carotid arterial Hsp70, p-Akt, and p-eNOS expression, significantly (P <.05) depressed FeCl3-enhanced vascular 2′,7′- dichlorodihydrofluorescein diacetate, chemokine (C-X3-C motif) ligand 1 (CX3CL1), 3-nitrotyrosine, 4-hydroxynonenal, and ICAM-1 stain, PAI-1, and t-PA activity, leukocyte infiltration and thrombus size, and significantly (P <.05) delayed thrombus formation compared with controls. 3-PTP and TP had a higher (P <.05) protection than 1-PTP. PI3K/Akt, Hsp70, or N(G)-nitro-l-arginine methyl ester hydrochloride (L-NAME) inhibitors significantly (P <.05) depressed 3-PTP and TP-induced vascular protection. Conclusions: Repetitive PTP is better than single PTP to hinder thrombosis formation via reinforcing PI3K/Akt-dependent Hsp70/eNOS signaling.
AB - Objective: We compared the effects of modified progressive thermal preconditioning (PTP) and whole-body thermal preconditioning (TP) on stress responses, oxidative stress biomarkers, and arterial thrombosis formation, and explored their possible actions through phosphatidylinositol 3-kinase (PI3K)/Akt-dependent heat-shock protein (Hsp)/endothelial nitric oxide synthase (eNOS) pathways. Methods: We divided four groups of 249 male Wistar rats into nonimmersed controls, TP, and one (1-PTP) and three consecutive cycles (3-PTP) of PTP in a 42°C water bath. We evaluated the stress responses, including hemodynamics, total energy transfer, endoplasmic reticulum (ER) stress marker glucose-regulated protein (GRP78), and blood reactive oxygen species level during TP or PTP treatment. We compared 1-PTP, 3-PTP, or TP effects on oxidative stress, intercellular adhesion molecule 1 (ICAM-1), Hsp70, tissue plasminogen activator (t-PA) and plasminogen activator inhibitor type 1 (PAI-1) activity, and vascular phosphorylated Akt (p-Akt) and eNOS (p-eNOS) expressions in a model of topical ferric chloride (FeCl3)-induced carotid artery thrombosis. Results: PTP significantly (P <.05) induced less hemodynamic fluctuations, total energy transfer, ER, and oxidative stress than TP did. After 24 or 72 hours of treatment, 1-PTP, 3-PTP, and TP significantly (P <.05) elevated carotid arterial Hsp70, p-Akt, and p-eNOS expression, significantly (P <.05) depressed FeCl3-enhanced vascular 2′,7′- dichlorodihydrofluorescein diacetate, chemokine (C-X3-C motif) ligand 1 (CX3CL1), 3-nitrotyrosine, 4-hydroxynonenal, and ICAM-1 stain, PAI-1, and t-PA activity, leukocyte infiltration and thrombus size, and significantly (P <.05) delayed thrombus formation compared with controls. 3-PTP and TP had a higher (P <.05) protection than 1-PTP. PI3K/Akt, Hsp70, or N(G)-nitro-l-arginine methyl ester hydrochloride (L-NAME) inhibitors significantly (P <.05) depressed 3-PTP and TP-induced vascular protection. Conclusions: Repetitive PTP is better than single PTP to hinder thrombosis formation via reinforcing PI3K/Akt-dependent Hsp70/eNOS signaling.
UR - http://www.scopus.com/inward/record.url?scp=84858184990&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84858184990&partnerID=8YFLogxK
U2 - 10.1016/j.jvs.2011.11.062
DO - 10.1016/j.jvs.2011.11.062
M3 - Article
C2 - 22244861
AN - SCOPUS:84858184990
SN - 0741-5214
VL - 56
SP - 159
EP - 170
JO - Journal of Vascular Surgery
JF - Journal of Vascular Surgery
IS - 1
ER -