INVESTIGADORES
PITOSSI Fernando Juan
artículos
Título:
Chronic expression of transforming growth factor-beta enhances adult neurogenesis.
Autor/es:
MATHIEU, PATRICIA; PIANTANIDA, AP; FERNANDO J PITOSSI
Revista:
NEUROIMMUNOMODULATION.
Editorial:
KARGER
Referencias:
Año: 2010 vol. 17 p. 200 - 201
ISSN:
1021-7401
Resumen:
Neural stem cells reside in two neurogenic regions of the
adult brain: the dentate gyrus of the hippocampus (DG) and
the subventricular zone (SVZ). Their proliferation, differentiation,
migration and survival are modulated by intrinsic
and extrinsic signals, forming a neurogenic niche. Brain cytokines
have only been recently regarded as possible components
of this neurogenic niche. In particular, we have
demonstrated that transforming growth factor- (TGF- )
has a pro-neurogenic effect in the DG in a model of increased
neurogenesis by adrenalectomy. We wanted to test whether
TGF- has a similar effect in another neurogenic region,
namely the SVZ. To test this possibility, adult rats were injected
with adenoviral vectors expressing TGF- (Ad-TGF) or(TGF- )
has a pro-neurogenic effect in the DG in a model of increased
neurogenesis by adrenalectomy. We wanted to test whether
TGF- has a similar effect in another neurogenic region,
namely the SVZ. To test this possibility, adult rats were injected
with adenoviral vectors expressing TGF- (Ad-TGF) orhas a similar effect in another neurogenic region,
namely the SVZ. To test this possibility, adult rats were injected
with adenoviral vectors expressing TGF- (Ad-TGF) or(Ad-TGF) or
-galactosidase (Ad-bgal) in the SVZ and neurogenesis was
evaluated 3 weeks later. We have observed that chronic TGF--galactosidase (Ad-bgal) in the SVZ and neurogenesis was
evaluated 3 weeks later. We have observed that chronic TGF-
expression increased neurogenesis in the ipsilateral hemisphere
of Ad-TGF but not in Ad-bgal-treated rats compared
to their contralateral side. In addition, an unspecific effect of
the adenoviral vector per se could not be totally discarded.
We conclude, under our experimental conditions, that TGF-expression increased neurogenesis in the ipsilateral hemisphere
of Ad-TGF but not in Ad-bgal-treated rats compared
to their contralateral side. In addition, an unspecific effect of
the adenoviral vector per se could not be totally discarded.
We conclude, under our experimental conditions, that TGF-
could enhance adult neurogenesis in the SVZ. This data
increase the growing evidence supporting a pro-neurogenic
role of anti-inflammatory cytokines in the adult brain.could enhance adult neurogenesis in the SVZ. This data
increase the growing evidence supporting a pro-neurogenic
role of anti-inflammatory cytokines in the adult brain.