title: Anti-CD11d monoclonal antibody treatment for rat spinal cord compression injury.
abstract: This study was initiated due to an NIH "Facilities of Research-Spinal Cord Injury" contract to support independent replication of published studies. Transient blockage of the CD11d/CD18 integrin has been reported to reduce secondary neuronal damage as well as to improve functional recovery after spinal cord injury (SCI) in rats. The purpose of this study was to determine whether treatment with an anti-CD11d monoclonal antibody (mAb) would improve motor performance, reduce pain and histopathological damage in animals following clip-compression injury as reported. Adult male Wistar rats (250g) were anesthetized with isoflurane, and the T12 spinal cord exposed by T10 and T11 dorsal laminectomies followed by a 60s period of clip compression utilizing a 35g clip. Control animals received an isotype-matched irrelevant antibody (1B7) while the treated group received the anti-CD11d mAb (217L; 1.0mg/kg) systemically. Open-field locomotion and sensory function were assessed and animals were perfusion-fixed at twelve weeks after injury for quantitative histopathological analysis. As compared to 1B7, 217L treated animals showed an overall non-significant trend to better motor recovery. All animals showed chronic mechanical allodynia and anti-CD11d mAb treatment did not significantly prevent its development. Histopathological analysis demonstrated severe injury to gray and white matter after compression with a non-significant trend in anti-CD11d protection compared to control animals for preserved myelin. Although positive effects with the anti-CD11d mAb treatment have been reported after compressive SCI, it is suggested that this potential treatment requires further investigation before clinical trials in spinal cord injured patients are implemented.
authors.affiliation: The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
authors.forename: Andres
authors.initials: A
authors.lastname: Hurtado
authors.forename: Alexander
authors.initials: A
authors.lastname: Marcillo
authors.forename: Beata
authors.initials: B
authors.lastname: Frydel
authors.forename: Mary Bartlett
authors.initials: MB
authors.lastname: Bunge
authors.forename: Helen M
authors.initials: HM
authors.lastname: Bramlett
authors.forename: W Dalton
authors.initials: WD
authors.lastname: Dietrich
mesh_terms: D000818:Animals; D019138:Antibodies, Blocking / Q000008:administration & dosage / Q000627:therapeutic use; D000911:Antibodies, Monoclonal / Q000008:administration & dosage / Q000627:therapeutic use*; D018845:CD11 Antigens / Q000276:immunology*; D008297:Male; D009043:Motor Activity / Q000187:drug effects / Q000276:immunology; D010147:Pain Measurement / Q000379:methods; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D013117:Spinal Cord Compression / Q000276:immunology* / Q000473:pathology / Q000628:therapy*; D016896:Treatment Outcome
chemical_list: D019138:Antibodies, Blocking; D000911:Antibodies, Monoclonal; D018845:CD11 Antigens; C503911:Itgad protein, rat