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Titolo:
Pattern of long-distance projections from fetal hippocampal field CA3 and CA1 cell grafts in lesioned CA3 of adult hippocampus follows intrinsic character of respective donor cells
Autore:
Shetty, AK; Zaman, V; Turner, DA;
Indirizzi:
Duke Univ, Med Ctr, Div Neurosurg, Dept Surg Neurosurg, Durham, NC 27710 USA Duke Univ Durham NC USA 27710 , Dept Surg Neurosurg, Durham, NC 27710 USA Duke Univ, Med Ctr, Dept Neurobiol, Durham, NC 27710 USA Duke Univ DurhamNC USA 27710 d Ctr, Dept Neurobiol, Durham, NC 27710 USA Vet Affairs Med Ctr, Med Res Serv, Durham, NC 27705 USA Vet Affairs Med Ctr Durham NC USA 27705 ed Res Serv, Durham, NC 27705 USA Vet Affairs Med Ctr, Surg Neurosurg Serv, Durham, NC 27705 USA Vet AffairsMed Ctr Durham NC USA 27705 rosurg Serv, Durham, NC 27705 USA
Titolo Testata:
NEUROSCIENCE
fascicolo: 2, volume: 99, anno: 2000,
pagine: 243 - 255
SICI:
0306-4522(2000)99:2<243:POLPFF>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
KAINIC ACID; PARKINSONS-DISEASE; STRIATAL GRAFTS; RAT HIPPOCAMPUS; MESENCEPHALIC TISSUE; EFFERENT CONNECTIONS; HUNTINGTONS-DISEASE; NEURAL TRANSPLANTS; FUNCTIONAL REPAIR; PYRAMIDAL NEURONS;
Keywords:
neural transplantation; axon growth; graft-host connections; temporal lobe epilepsy; hyperexcitability; hippocampal grafts;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
71
Recensione:
Indirizzi per estratti:
Indirizzo: Shetty, AK Duke Univ, Med Ctr, Div Neurosurg, Dept Surg Neurosurg, Box 3807, Durham, NC 27710 USA Duke Univ Box 3807 Durham NC USA 27710 07, Durham, NC 27710 USA
Citazione:
A.K. Shetty et al., "Pattern of long-distance projections from fetal hippocampal field CA3 and CA1 cell grafts in lesioned CA3 of adult hippocampus follows intrinsic character of respective donor cells", NEUROSCIENC, 99(2), 2000, pp. 243-255

Abstract

Fetal hippocampal grafts transplanted to the lesioned CA3 of adult hippocampus can extend axonal projections to many regions of the host brain. However, the identity of grafted cells that project to specific host regions is unknown. We hypothesize that the pattern of long-distance axonal projections from distinct fetal hippocampal cells grafted to lesioned CA3 is specified by the intrinsic nature of respective donor cells rather than characteristics of the host graft region. We grafted fetal hippocampal CA3 or CA1 cells into kainic acid lesioned CA3 of adult hippocampus at four days post-lesion. Neurons projecting to either the contralateral hippocampus or the ipsilateral septum were then measured in these grafts at four months post-grafting using Fluoro-Gold and DiI tract tracing. CA3 grafts located close to thedegenerated CA3 cell layer showed a high propensity for establishing projections into the contralateral hippocampus (commissural projections) compared to similarly located CA1 grafts, which exhibited negligible commissural projections. Similar distinction was observed between the two graft types even when they were located only partially in the lesioned CA3. Among CA3 grafts, those placed near the degenerated CA3 cell layer established significantly greater commissural projections than those placed only partially in the CA3 region. Septal projections, in contrast, were robust from both CA3 and CA1 grafts. This differential projection pattern between CA3 and CA1 grafts resembles projections of CA3 and CA1 cells in intact hippocampus. These results demonstrate that the intrinsic character of grafted fetal cells determines the type of efferent projections from fetal grafts into different targets in the lesioned adult host brain. However, the extent of efferent projections from specific grafts is also influenced by the location ofgrafted cells within the host region. Thus, graft-mediated appropriate reconstruction of damaged circuitry in the lesioned brain may require graftingof homotopic donor cells. Further, the robust and specific projections observed from CA3 grafts is likely beneficial for functional recovery of hippocampus following CA3 injury and hence of significance towards developing a graft-mediated therapy for human temporal lobe epilepsy. (C) 2000 IBRO. Published by Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 08:17:51