Abstract
Hypothermia has emerged as a viable neuroprotectant at the clinical level. The reasons for its protective effect are likely due to its ability to affect multiple facets of ischemic brain injury. While at times difficult to implement in humans due to various comorbidities, hypothermia can also be viewed as a tool by which neuroprotective targets may be identified. In this review, we discuss optimal conditions for therapeutic hypothermia, as evidenced by laboratory studies, as well as many of the effects of cooling on several cell death and cell survival pathways. The collective scientific literature indicates that temperature need only be decreased by a few degrees in order to confer protection, but early cooling and cooling of somewhat long duration (12–24 h) seem to be the more critical factors that determine success. Hypothermia seems to halt many damaging processes that lead to brain tissue injury, while upregulating factors that aid in its recovery. However, it should be noted that not all forms of brain injury benefit from therapeutic cooling. While global and focal cerebral ischemia appears to benefit from hypothermia, it is less clear whether brain hemorrhage responds in the same way. Thus, the laboratory literature also emphasizes the importance of careful preclinical studies prior to applying such concepts to humans.
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References
Bernard SA, Gray TW, Buist MD, et al. Treatment of comatose survivors of out-of-hospital cardiac arrest with induced hypothermia. N Engl J Med. 2002;346:557–63.
HACA. Mild therapeutic hypothermia to improve the neurologic outcome after cardiac arrest. N Engl J Med. 2002;346:549–56.
Gluckman PD, Wyatt JS, Azzopardi D, et al. Selective head cooling with mild systemic hypothermia after neonatal encephalopathy: multicentre randomised trial. Lancet. 2005;365:663–70.
Shankaran S, Laptook AR, Ehrenkranz RA, et al. Whole-body hypothermia for neonates with hypoxic-ischemic encephalopathy. N Engl J Med. 2005;353:1574–84.
Azzopardi D, Strohm B, Edwards AD, et al. Moderate hypothermia to treat perinatal asphyxial encephalopathy. N Engl J Med. 2009;361:1349–58.
Simbruner G, Mittal RA, Rohlmann F, Muche R. Systemic hypothermia after neonatal encephalopathy: outcomes of neo.nEURO.network RCT. Pediatrics. 2010;126:e771–8.
Schwab S, Schwarz S, Spranger M, et al. Moderate hypothermia in the treatment of patients with severe middle cerebral artery infarction. Stroke. 1998;29:2461–6.
De Georgia MA, Krieger DW, Abou-Chebl A, et al. Cooling for Acute Ischemic Brain Damage (COOL AID): a feasibility trial of endovascular cooling. Neurology. 2004;63:312–7.
Lyden PD, Allgren RL, Ng K, et al. Intravascular cooling in the treatment of stroke (ICTuS): early clinical experience. J Stroke Cerebrovasc Dis. 2005;14:107–14.
Hemmen TM, Raman R, Guluma KZ, et al. Intravenous thrombolysis plus hypothermia for acute treatment of ischemic stroke (ICTuS-L): final results. Stroke. 2010;41:2265–70.
Schwab S, Georgiadis D, Berrouschot J, et al. Feasibility and safety of moderate hypothermia after massive hemispheric infarction. Stroke. 2001;32:2033–5.
Lyden PD, Krieger D, Yenari M, Dietrich WD. Therapeutic hypothermia for acute stroke. Int J Stroke. 2006;1:9–19.
Polderman KH, Herold I. Therapeutic hypothermia and controlled normothermia in the intensive care unit: practical considerations, side effects, and cooling methods. Crit Care Med. 2009;37:1101–20.
Busto R, Dietrich WD, Globus MY, Ginsberg MD. The importance of brain temperature in cerebral ischemic injury. Stroke. 1989;20:1113–4.
Busto R, Dietrich WD, Globus MY, et al. Small differences in intraischemic brain temperature critically determine the extent of ischemic neuronal injury. J Cereb Blood Flow Metab. 1987;7:729–38.
van der Worp HB, Macleod MR, Kollmar R. Therapeutic hypothermia for acute ischemic stroke: ready to start large randomized trials? J Cereb Blood Flow Metab. 2010;30:1079–93.
Maier CM, Ahern K, Cheng ML, et al. Optimal depth and duration of mild hypothermia in a focal model of transient cerebral ischemia: effects on neurologic outcome, infarct size, apoptosis, and inflammation. Stroke. 1998;29:2171–80.
Huh PW, Belayev L, Zhao W, et al. Comparative neuroprotective efficacy of prolonged moderate intraischemic and postischemic hypothermia in focal cerebral ischemia. J Neurosurg. 2000;92:91–9.
Kollmar R, Blank T, Han JL, et al. Different degrees of hypothermia after experimental stroke: short- and long-term outcome. Stroke. 2007;38:1585–9.
Georgiadis D, Schwarz S, Kollmar R, Schwab S. Endovascular cooling for moderate hypothermia in patients with acute stroke: first results of a novel approach. Stroke. 2001;32:2550–3.
Krieger DW, De Georgia MA, Abou-Chebl A, et al. Cooling for acute ischemic brain damage (cool aid): an open pilot study of induced hypothermia in acute ischemic stroke. Stroke. 2001;32:1847–54.
Jacobs S, Hunt R, Tarnow-Mordi W, et al. Cooling for newborns with hypoxic ischaemic encephalopathy. Cochrane Database Syst Rev. 2007:CD003311.
Hutchison JS, Ward RE, Lacroix J, et al. Hypothermia therapy after traumatic brain injury in children. N Engl J Med. 2008;358:2447–56.
Peterson K, Carson S, Carney N. Hypothermia treatment for traumatic brain injury: a systematic review and meta-analysis. J Neurotrauma. 2008;25:62–71.
Tokutomi T, Miyagi T, Takeuchi Y, et al. Effect of 35 degrees C hypothermia on intracranial pressure and clinical outcome in patients with severe traumatic brain injury. J Trauma. 2009;66:166–73.
Kammersgaard LP, Rasmussen BH, Jorgensen HS, et al. Feasibility and safety of inducing modest hypothermia in awake patients with acute stroke through surface cooling: a case-control study: the Copenhagen Stroke Study. Stroke. 2000;31:2251–6.
Krieger DW, Yenari MA. Therapeutic hypothermia for acute ischemic stroke: what do laboratory studies teach us? Stroke. 2004;35:1482–9.
Clark DL, Penner M, Orellana-Jordan IM, Colbourne F. Comparison of 12, 24 and 48 h of systemic hypothermia on outcome after permanent focal ischemia in rat. Exp Neurol. 2008;212:386–92.
Colbourne F, Corbett D. Delayed and prolonged post-ischemic hypothermia is neuroprotective in the gerbil. Brain Res. 1994;654:265–72.
Colbourne F, Corbett D, Zhao Z, et al. Prolonged but delayed postischemic hypothermia: a long-term outcome study in the rat middle cerebral artery occlusion model. J Cereb Blood Flow Metab. 2000;20:1702–8.
van der Worp HB, Sena ES, Donnan GA, et al. Hypothermia in animal models of acute ischaemic stroke: a systematic review and meta-analysis. Brain. 2007;130:3063–74.
Zhang ZG, Chopp M, Chen H. Duration dependent post-ischemic hypothermia alleviates cortical damage after transient middle cerebral artery occlusion in the rat. J Neurol Sci. 1993;117:240–4.
Carroll M, Beek O. Protection against hippocampal CA1 cell loss by post-ischemic hypothermia is dependent on delay of initiation and duration. Metab Brain Dis. 1992;7:45–50.
Dietrich WD, Busto R, Alonso O, et al. Intraischemic but not postischemic brain hypothermia protects chronically following global forebrain ischemia in rats. J Cereb Blood Flow Metab. 1993;13:541–9.
Shuaib A, Waqar T, Wishart T, Kanthan R. Post-ischemic therapy with CGS-19755 (alone or in combination with hypothermia) in gerbils. Neurosci Lett. 1995;191:87–90.
Colbourne F, Corbett D. Delayed postischemic hypothermia: a six month survival study using behavioral and histological assessments of neuroprotection. J Neurosci. 1995;15:7250–60.
Colbourne F, Li H, Buchan AM. Indefatigable CA1 sector neuroprotection with mild hypothermia induced 6 hours after severe forebrain ischemia in rats. J Cereb Blood Flow Metab. 1999;19:742–9.
Olsen TS, Weber UJ, Kammersgaard LP. Therapeutic hypothermia for acute stroke. Lancet Neurol. 2003;2:410–6.
Shackelford RT, Hegedus SA. Factors affecting cerebral blood flow—experimental review: sympathectomy, hypothermia, CO2 inhalation and pavarine. Ann Surg. 1966;163:771–7.
Erecinska M, Thoresen M, Silver IA. Effects of hypothermia on energy metabolism in mammalian central nervous system. J Cereb Blood Flow Metab. 2003;23:513–30.
Hagerdal M, Harp J, Nilsson L, Siesjo BK. The effect of induced hypothermia upon oxygen consumption in the rat brain. J Neurochem. 1975;24:311–6.
Hagerdal M, Harp J, Siesjo BK. Effect of hypothermia upon organic phosphates, glycolytic metabolites, citric acid cycle intermediates and associated amino acids in rat cerebral cortex. J Neurochem. 1975;24:743–8.
Ehrlich MP, McCullough JN, Zhang N, et al. Effect of hypothermia on cerebral blood flow and metabolism in the pig. Ann Thorac Surg. 2002;73:191–7.
Yenari M, Wijman C, Steinberg G. Effects of hypothermia on cerebral metabolism, blood flow, and autoregulation. New York: Marcel Dekker; 2004. p. 141–78.
Busto R, Globus MY, Dietrich WD, et al. Effect of mild hypothermia on ischemia-induced release of neurotransmitters and free fatty acids in rat brain. Stroke. 1989;20:904–10.
Matsumoto M, Scheller MS, Zornow MH, Strnat MA. Effect of S-emopamil, nimodipine, and mild hypothermia on hippocampal glutamate concentrations after repeated cerebral ischemia in rabbits. Stroke. 1993;24:1228–34.
Mitani A, Kataoka K. Critical levels of extracellular glutamate mediating gerbil hippocampal delayed neuronal death during hypothermia: brain microdialysis study. Neuroscience. 1991;42:661–70.
Young RS, Zalneraitis EL, Dooling EC. Neurological outcome in cold water drowning. JAMA. 1980;244:1233–5.
Colbourne F, Grooms SY, Zukin RS, et al. Hypothermia rescues hippocampal CA1 neurons and attenuates down-regulation of the AMPA receptor GluR2 subunit after forebrain ischemia. Proc Natl Acad Sci U S A. 2003;100:2906–10.
Hu BR, Kamme F, Wieloch T. Alterations of Ca2+/calmodulin-dependent protein kinase II and its messenger RNA in the rat hippocampus following normo- and hypothermic ischemia. Neuroscience. 1995;68:1003–16.
Takata T, Nabetani M, Okada Y. Effects of hypothermia on the neuronal activity, [Ca2+]i accumulation and ATP levels during oxygen and/or glucose deprivation in hippocampal slices of guinea pigs. Neurosci Lett. 1997;227:41–4.
Taylor CP, Burke SP, Weber ML. Hippocampal slices: glutamate overflow and cellular damage from ischemia are reduced by sodium-channel blockade. J Neurosci Methods. 1995;59:121–8.
Kim JY, Kim N, Chang W, Yenari MA. Mild hypothermia suppresses calcium sensing receptor (CaSR) induction following forebrain ischemia while increasing GABA-B receptor1 (GABA-B-R1) expression. Transl Stroke Res. 2011;2(2):195–201.
Liu L, Yenari MA. Therapeutic hypothermia: neuroprotective mechanisms. Front Biosci. 2007;12:816–25.
Inamasu J, Suga S, Sato S, et al. Intra-ischemic hypothermia attenuates intercellular adhesion molecule-1 (ICAM-1) and migration of neutrophil. Neurol Res. 2001;23:105–11.
Kawai N, Okauchi M, Morisaki K, Nagao S. Effects of delayed intraischemic and postischemic hypothermia on a focal model of transient cerebral ischemia in rats. Stroke. 2000;31:1982–9. discussion 1989.
Wang GJ, Deng HY, Maier CM, et al. Mild hypothermia reduces ICAM-1 expression, neutrophil infiltration and microglia/monocyte accumulation following experimental stroke. Neuroscience. 2002;114:1081–90.
Han HS, Qiao Y, Karabiyikoglu M, et al. Influence of mild hypothermia on inducible nitric oxide synthase expression and reactive nitrogen production in experimental stroke and inflammation. J Neurosci. 2002;22:3921–8.
Yenari MA, Han HS. Influence of hypothermia on post-ischemic inflammation: role of nuclear factor kappa B (NFkappaB). Neurochem Int. 2006;49:164–9.
Webster CM, Kelly S, Koike MA, et al. Inflammation and NFkappaB activation is decreased by hypothermia following global cerebral ischemia. Neurobiol Dis. 2009;33:301–12.
Dietrich WD, Busto R, Halley M, Valdes I. The importance of brain temperature in alterations of the blood–brain barrier following cerebral ischemia. J Neuropathol Exp Neurol. 1990;49:486–97.
Burk J, Burggraf D, Vosko M, et al. Protection of cerebral microvasculature after moderate hypothermia following experimental focal cerebral ischemia in mice. Brain Res. 2008;1226:248–55.
Hamann GF, Burggraf D, Martens HK, et al. Mild to moderate hypothermia prevents microvascular basal lamina antigen loss in experimental focal cerebral ischemia. Stroke. 2004;35:764–9.
Lee JE, Yoon YJ, Moseley ME, Yenari MA. Reduction in levels of matrix metalloproteinases and increased expression of tissue inhibitor of metalloproteinase-2 in response to mild hypothermia therapy in experimental stroke. J Neurosurg. 2005;103:289–97.
Truettner JS, Alonso OF, Dalton Dietrich W. Influence of therapeutic hypothermia on matrix metalloproteinase activity after traumatic brain injury in rats. J Cereb Blood Flow Metab. 2005;25:1505–16.
Wagner S, Nagel S, Kluge B, et al. Topographically graded postischemic presence of metalloproteinases is inhibited by hypothermia. Brain Res. 2003;984:63–75.
Globus MY, Busto R, Lin B, et al. Detection of free radical activity during transient global ischemia and recirculation: effects of intraischemic brain temperature modulation. J Neurochem. 1995;65:1250–6.
Maier CM, Sun GH, Cheng D, et al. Effects of mild hypothermia on superoxide anion production, superoxide dismutase expression, and activity following transient focal cerebral ischemia. Neurobiol Dis. 2002;11:28–42.
Yenari MA. Heat shock proteins and neuroprotection. Adv Exp Med Biol. 2002;513:281–99.
Yenari M, Kitagawa K, Lyden P, Perez-Pinzon M. Metabolic downregulation: a key to successful neuroprotection? Stroke. 2008;39:2910–7.
Han HS, Yenari MA. Effect of gene expression by therapeutic hypothermia in cerebral ischemia. Future Neurol. 2007;2:435–40.
Hemmen TM, Lyden PD. Induced hypothermia for acute stroke. Stroke. 2007;38:794–9.
Behringer W. Global brain ischemia: animal studies. In: Tisherman SA, Sterz F, editors. Therapeutic hypothermia. New York: Springer; 2005. p. 1–10.
Laptook AR. Use of therapeutic hypothermia for term infants with hypoxic-ischemic encephalopathy. Pediatr Clin North Am. 2009;56:601–16.
Tang XN, Yenari MA. Hypothermia as a cytoprotective strategy in ischemic tissue injury. Ageing Res Rev. 2010;9:61–8.
Fingas M, Clark DL, Colbourne F. The effects of selective brain hypothermia on intracerebral hemorrhage in rats. Exp Neurol. 2007;208:277–84.
MacLellan CL, Davies LM, Fingas MS, Colbourne F. The influence of hypothermia on outcome after intracerebral hemorrhage in rats. Stroke. 2006;37:1266–70.
Kawanishi M, Kawai N, Nakamura T, et al. Effect of delayed mild brain hypothermia on edema formation after intracerebral hemorrhage in rats. J Stroke Cerebrovasc Dis. 2008;17:187–95.
MacLellan CL, Girgis J, Colbourne F. Delayed onset of prolonged hypothermia improves outcome after intracerebral hemorrhage in rats. J Cereb Blood Flow Metab. 2004;24:432–40.
Kollmar R, Staykov D, Dorfler A, et al. Hypothermia reduces perihemorrhagic edema after intracerebral hemorrhage. Stroke. 2010;41:1684–9.
Torok E, Klopotowski M, Trabold R, et al. Mild hypothermia (33 degrees C) reduces intracranial hypertension and improves functional outcome after subarachnoid hemorrhage in rats. Neurosurgery. 2009;65:352–9.
Schubert GA, Poli S, Schilling L, et al. Hypothermia reduces cytotoxic edema and metabolic alterations during the acute phase of massive SAH: a diffusion-weighted imaging and spectroscopy study in rats. J Neurotrauma. 2008;25:841–52.
Kawamura Y, Yamada K, Masago A, et al. Hypothermia modulates induction of hsp70 and c-jun mRNA in the rat brain after subarachnoid hemorrhage. J Neurotrauma. 2000;17:243–50.
Muroi C, Frei K, El Beltagy M, et al. Combined therapeutic hypothermia and barbiturate coma reduces interleukin-6 in the cerebrospinal fluid after aneurysmal subarachnoid hemorrhage. J Neurosurg Anesthesiol. 2008;20:193–8.
Todd MM, Hindman BJ, Clarke WR, Torner JC. Mild intraoperative hypothermia during surgery for intracranial aneurysm. N Engl J Med. 2005;352:135–45.
Seule MA, Muroi C, Mink S, et al. Therapeutic hypothermia in patients with aneurysmal subarachnoid hemorrhage, refractory intracranial hypertension, or cerebral vasospasm. Neurosurgery. 2009;64:86–92. discussion 83–92.
Fernandez A, Schmidt JM, Claassen J, et al. Fever after subarachnoid hemorrhage: risk factors and impact on outcome. Neurology. 2007;68:1013–9.
Proust F, Hannequin D, Langlois O, et al. Causes of morbidity and mortality after ruptured aneurysm surgery in a series of 230 patients. The importance of control angiography. Stroke. 1995;26:1553–7.
Elewa HF, Hilali H, Hess DC, et al. Minocycline for short-term neuroprotection. Pharmacotherapy. 2006;26:515–21.
Lampl Y, Boaz M, Gilad R, et al. Minocycline treatment in acute stroke: an open-label, evaluator-blinded study. Neurology. 2007;69:1404–10.
Fagan SC, Waller JL, Nichols FT, et al. Minocycline to improve neurologic outcome in stroke (MINOS): a dose-finding study. Stroke. 2010;41:2283–7.
Kobayashi MS, Asai S, Ishikawa K, et al. Global profiling of influence of intra-ischemic brain temperature on gene expression in rat brain. Brain Res Rev. 2008;58:171–91.
Kelly S, Yenari MA. Neuroprotection: heat shock proteins. Curr Med Res Opin. 2002;18 Suppl 2:s55–60.
Kumar K, Wu X, Evans AT, Marcoux F. The effect of hypothermia on induction of heat shock protein (HSP)-72 in ischemic brain. Metab Brain Dis. 1995;10:283–91.
Gordon CJ, McMahon B, Richelson E, et al. Neurotensin analog NT77 induces regulated hypothermia in the rat. Life Sci. 2003;73:2611–23.
Katz LM, Young A, Frank JE, et al. Neurotensin-induced hypothermia improves neurologic outcome after hypoxic-ischemia. Crit Care Med. 2004;32:806–10.
Tyler-McMahon BM, Stewart JA, Farinas F, et al. Highly potent neurotensin analog that causes hypothermia and antinociception. Eur J Pharmacol. 2000;390:107–11.
Scanlan TS, Suchland KL, Hart ME, et al. 3-Iodothyronamine is an endogenous and rapid-acting derivative of thyroid hormone. Nat Med. 2004;10:638–42.
Blackstone E, Roth MB. Suspended animation-like state protects mice from lethal hypoxia. Shock. 2007;27:370–2.
Acknowledgments
This work was supported by the Department of Veterans Affairs, grants to MAY from the NIH R01 NS 40156, P50 NS014543, Department of Veterans Affairs Merit Review Award I01BX007080, and the Department of Defense DAMD17-03-1-0532. Grants were administered by the Northern California Institute for Research and Education, and supported by resources of the San Francisco Veterans Affairs Medical Center.
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Hokari, M., Yenari, M.A. (2012). Hypothermia to Identify Therapeutic Targets for Stroke Treatment. In: Lapchak, P., Zhang, J. (eds) Translational Stroke Research. Springer Series in Translational Stroke Research. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9530-8_15
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