Ricerca avanzata

Home > Riviste > Panminerva Medica > Fascicoli precedenti > Panminerva Medica 2004 Marzo;46(1) > Panminerva Medica 2004 Marzo;46(1):1-11



Rivista di Medicina Interna

Indexed/Abstracted in: BIOSIS Previews, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,6

Periodicità: Trimestrale

ISSN 0031-0808

Online ISSN 1827-1898


Panminerva Medica 2004 Marzo;46(1):1-11


Circulating stem cells and tissue repair

Hennessy B., Körbling M., Estrov Z.

Department of Bioimmunotherapy and Blood and Marrow Transplantation The University of Texas MD Anderson Cancer Center Houston, Texas, USA

Stem ­cells are ­defined as ­cells ­that ­have clon­o­gen­ic, ­self-renew­ing capac­ities and the capa­bil­ity to dif­fer­en­tiate ­into mul­ti­ple ­cell lin­e­ag­es. Whereas embryon­ic ­stem ­cells are ­derived ­from mam­mal­ian ­embryos in the blas­to­cyst ­stage and can gen­er­ate ter­mi­nal­ly dif­fer­en­tiat­ed ­cells of all 3 embryon­ic ­germ ­layers, ­adult ­human ­stem ­cells are ­capable of main­tain­ing, gen­er­at­ing, and replac­ing ter­mi­nal­ly dif­fer­en­tiat­ed ­cells with­in ­their own spe­cif­ic tis­sue as a con­se­quence of phys­io­log­ic ­cell turn­over or tis­sue inju­ry. The tra­di­tion­al ­idea of ­organ-restrict­ed ­stem-­cell dif­fe­ren­ti­a­tion is now ­being chal­lenged by the sug­ges­tion ­that ­adult ­stem ­cells ­retain devel­op­men­tal plas­tic­ity. Preclinical and clin­i­cal stud­ies ­described in ­this ­review pro­vide evi­dence ­that with­in the ­blood cir­cu­late not ­only pro­gen­i­tor ­cells ­that dif­fer­en­tiate ­into hemat­o­poiet­ic ­cells, but ­also ­stem/pro­gen­i­tor ­cells ­which can par­tic­i­pate in the homeo­sta­sis, ­repair and replace­ment of sol­id ­organ tis­sues. In addi­tion to the occur­rence of ­cell ­fusion, ­there are 4 sug­gest­ed mech­a­nisms of ­adult ­stem ­cell dif­fe­ren­ti­a­tion ­into sol­id ­organ ­cells. Preclinical ­data sup­port ­these mod­els par­tic­u­lar­ly ­that of trans­dif­fe­ren­ti­a­tion as the ­most like­ly mod­el, allow­ing ­stem/pro­gen­i­tor ­cells to dif­fer­en­tiate ­across lin­e­age, tis­sue, and ­germ ­layer boun­dar­ies. There is increas­ing evi­dence ­that we can manip­u­late in ­vivo cir­cu­lat­ing ­adult ­stem ­cells to ­repair or regen­er­ate sol­id ­organ tis­sue, ­which ­offers poten­tial clin­i­cal ben­e­fit in the treat­ment of ­many hered­i­tary and ­acquired dis­eas­es.

lingua: Inglese


inizio pagina