Abstract
Stroke forskning har tålt mange tilbakeslag i å oversette nevro terapi i klinisk praksis. I motsetning til den virkelige verden terapi (Pa trombolyse) produserer sjelden fordeler i mekaniske okklusjon-baserte eksperimentelle modeller, som dominerer preklinisk hjerneslag forskning. Denne fordelingen mellom benk og nattbord antyder behovet for å ansette Pa-responsive modeller i preklinisk hjerneslag forskning. For dette formål, er en enkel og tPA-reaktive trombotisk slag modell oppfunnet og beskrevet her. Denne modellen består av transient okklusjon av den ensidige arteria carotis communis og levering av 7,5% oksygen gjennom en ansiktsmaske i voksen mus i 30 minutter, under opprettholdelse av dyret rektal temperatur på 37,5 ± 0,5 ° C. Selv reversibel ligering av den ensidige carotid arterie eller hypoksi hver trykkes cerebral blodstrøm bare forbigående, er kombinasjonen av begge fornærmelser forårsaket varig reperfusjon underskudd, fibrin og blodplateavleiring, og store INFARct i midten cerebral arterie-leverte territorium. Viktigere, haleveneinjeksjon av rekombinant tPA ved 0,5, 1, eller fire timer etter Thi (10 mg / kg) gitt tidsavhengig reduksjon av dødelighet og infarktstørrelsen. Denne nye slagmodell, er enkel og kan standardiseres tvers laboratorier for å sammenligne eksperimentelle resultater. Videre induserer det trombose uten craniectomy eller innføre forhånds dannet emboli. Gitt disse unike fordeler, er thi modellen et nyttig tillegg til repertoaret av preklinisk hjerneslag forskning.
Materials
| Name | Company | Catalog Number | Comments |
| adult male mice | Charles River | C57BL/6 | 10-13 weeks old (22-30 g) |
| Mobile Laboratory Animal Anesthesia System | VetEquip | 901807 | anesthesia |
| Medical air (Compressed) air tank | Airgas | UN1002 | anesthesia |
| Isoflurane | Piramal Healthcare | NDC 66794-013-25 | anesthesia |
| Multi-Station Lab Animal AnesthesiaSystem | Surgivet | V703501 | hypoxia system |
| 7.5% O2 balanced by 92.5% N2 tank | Airgas | UN1956 | hypoxia system |
| Temperature Controller with heating lamp | Cole Parmer | EW-89000-10 | temperature controllers |
| Rectal probe | Cole Parmer | NCI-00141PG | temperature controllers |
| Dissecting microscope | Olympus | SZ40 | surgical setup |
| Heat pump with warming pad | Gaymar | TP700 | surgical setup |
| Fine curved forceps (serrated) | FST | 11370-31 | surgical instrument |
| Fine curved forceps (smooth) | FST | 11373-12 | surgical instrument |
| micro scissors | FST | 15000-03 | surgical instrument |
| micro needle holders | FST | 12060-01 | surgical instrument |
| Halsted-Mosquito hemostats | FST | 13008-12 | surgical instrument |
| 5-0 silk suture | Harvard Apparatus | 624143 | surgical supplies |
| 4-0 Nylon monofilament suture | LOOK | 766B | surgical supplies |
| Tissue glue | Abbott Laboratories | NC9855218 | surgical supplies |
| Puralube Vet ointment | Fisher | NC0138063 | eye dryness prevention |
| MoorFLPI-2 blood flow imager | Moor | 780-nm laser source | Laser Speckle Contrast Imaging |
| Mannitol | Sigma | M4125 | in vivo TTC |
| 2,3,5-triphenyltetrazolium chloride (TTC) | Sigma | T8877 | in vivo TTC |
| Vibratome | Stoelting | 51425 | brain section for in vivo TTC |
| Digital microscope | Dino-Lite | AM2111 | whole-brain imaging |
| O.C.T compound | Sakura Finetek | 4583 | |
| goat anti-rabbit Alexa Fluro 488 | Invitrogen | A11008 | Immunohistochemistry |
| Cryostat | Vibratome | ultrapro 5000 | brain section for IHC |
| Evans blue | Sigma | E2129 | Detecting vascular perfusion |
| Microtome | Electron Microscopy Sciences | 5000 | brain section for histology |
| Avertin (2, 2, 2-Tribromoethanol) | Sigma | T48402 | euthanasia |
| Fluorescent microscope | Olympus | DP73 | |
| Meloxicam SR | ZooPharm | NSAID analgesia |
References
- Broderick, J. P., Hacke, W. Treatment of acute ischemic stroke: Part I: recanalization strategies. Circulation. 106 (12), 1563-1569 (2002).
- Hossmann, K. A. Pathophysiological basis of translational stroke research. Folia Neuropathol. 47 (3), 213-227 (2009).
- Hossmann, K. A. The two pathophysiologies of focal brain ischemia: implications for translational stroke research. J. Cereb. Blood Flow Metab. 32 (7), 1310-1316 (2012).
- Macrae, I. M. Preclinical stroke research--advantages and disadvantages of the most common rodent models of focal ischaemia. Br. J. Pharmacol. 164 (4), 1062-1078 (2011).
- Niessen, F., Hilger, T., Hoehn, M., Hossmann, K. A. Differences in clot preparation determine outcome of recombinant tissue plasminogen activator treatment in experimental thromboembolic stroke. Stroke. 34 (8), 2019-2024 (2003).
- Orset, C., et al. Mouse model of in situ thromboembolic stroke and reperfusion. Stroke. 38 (10), 2771-2778 (2007).
- Watson, B. D., Dietrich, W. D., Prado, R., Ginsberg, M. D. Argon laser-induced arterial photothrombosis. Characterization and possible application to therapy of arteriovenous malformations. J. Neurosurgery. 66 (5), 748-754 (1987).
- Sun, Y. Y., et al. Synergy of combined tPA-edaravone therapy in experimental thrombotic stroke. PLoS One. 9, e98807 (2014).
- Levine, S. Anoxic-ischemic encephalopathy in rats. Am. J. Pathol. 36, 1-17 (1960).
- Rice, J. E. 3rd, Vannucci, R. C., Brierley, J. B. The influence of immaturity on hypoxic-ischemic brain damage in the rat. Annals Neurol. 9 (2), 131-141 (1981).
- Vannucci, S. J., et al. Experimental stroke in the female diabetic, db/db, mouse. J. Cereb. Blood Flow Metab. 21 (2), 52-60 (2001).
- Adhami, F., et al. Cerebral ischemia-hypoxia induces intravascular coagulation and autophagy. Am. J. Pathol. 169 (2), 566-583 (2006).
- Shereen, A., et al. Ex vivo diffusion tensor imaging and neuropathological correlation in a murine model of hypoxia-ischemia-induced thrombotic stroke. J. Cereb. Blood Flow Metab. 31 (4), 1155-1169 (2011).
- Michaud, J. P., Pimentel-Coelho, P. M., Tremblay, Y., Rivest, S. The impact of Ly6C low monocytes after cerebral hypoxia-ischemia in adult mice. J. Cereb. Blood Flow Metab. 34 (7), e1-e9 (2014).
- Zoppo, G. J. Virchow's triad: the vascular basis of cerebral injury. Rev. Neurol. Dis. 5, 12-21 (2008).
- Dunn, A. K. Laser speckle contrast imaging of cerebral blood flow. Annals Biomed. Eng. 40 (2), 367-377 (2012).
- Sun, Y. Y., Yang, D., Kuan, C. Y. Mannitol-facilitated perfusion staining with 2,3,5-triphenyltetrazolium chloride (TTC) for detection of experimental cerebral infarction and biochemical analysis. J. Neurosci. Methods. 203 (1), 122-129 (2012).
- Lozano, R., et al. Global and regional mortality from 235 causes of death for 20 age groups in 1990 and 2010: a systematic analysis for the Global Burden of Disease Study. Lancet. 380 (9859), 2095-2128 (2010).
- Murray, C. J., et al. Disability-adjusted life years (DALYs) for 291 diseases and injuries in 21 regions, 1990-2010: a systematic analysis for the Global Burden of Disease Study. Lancet. 380 (9859), 2197-2223 (2012).
- Dirnagl, U., Macleod, M. R. Stroke research at a road block: the streets from adversity should be paved with meta-analysis and good laboratory practice. Br. J. Pharm. 157 (7), 1154-1156 (2009).
- Dirnagl, U., et al. A concerted appeal for international cooperation in preclinical stroke research. Stroke. 44 (6), 1754-1760 (2013).
- Khatri, P., et al. Revascularization end points in stroke interventional trials: recanalization versus reperfusion in IMS-I. Stroke. 36 (11), 2400-2403 (2005).
- Rosenberg, R. D., Aird, W. C. Vascular-bed--specific hemostasis and hypercoagulable states. New Eng. J. Med. 340 (20), 1555-1564 (1999).
- Majid, A., et al. Differences in vulnerability to permanent focal cerebral ischemia among 3 common mouse strains. Stroke. 31 (11), 2707-2714 (2000).
