INVESTIGADORES
PASQUINI juana Maria
artículos
Título:
Galectin-3 controls the response of microglial cells to limit
Autor/es:
HOYOS HC, RINALDI M., MENDEZ HUERGO E, MARDER M,, PASQUINI JM., RABINOVICH, AND PASQUINI LA
Revista:
NEUROBIOLOGY OF DISEASE
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 62 p. 441 - 455
ISSN:
0969-9961
Resumen:
neurodegenerative
diseases. Cuprizone (CPZ)-induced demyelination is characterized by the loss of mature oligodendrocytes
(OLG) by apoptosis, myelin sheath degeneration and recruitment of microglia and astrocytes to the
lesioned area. We compared CPZ-induced demyelination of 8-week-old Lgals3−/− vs WT mice. Lgals3−/− mice
displayed a similar susceptibility to CPZ-induced demyelination up to the fifthweek, as evaluated byMBP immunostaining
and electronicmicroscopy. However, OLG progenitors (OPC) generated in CPZ-treated Lgals3−/− mice
showed diminished arborization, suggesting decreased ability of these cells to differentiate. Surprisingly, while
WT mice experienced spontaneous remyelination in the fifth week of CPZ treatment?even though the CPZ
diet was maintained up to sixth week?Lgals3−/− mice lacked this capacity and suffered continuous demyelination
up to the sixth week, accompanied by pronounced astroglial activation. Moreover, after 2 weeks of CPZ
treatment, WT and Lgals3−/− mice showed lower innate anxiety as compared with respective naive mice, but
only CPZ-treated Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−Lgals3−/− vs WT mice. Lgals3−/− mice
displayed a similar susceptibility to CPZ-induced demyelination up to the fifthweek, as evaluated byMBP immunostaining
and electronicmicroscopy. However, OLG progenitors (OPC) generated in CPZ-treated Lgals3−/− mice
showed diminished arborization, suggesting decreased ability of these cells to differentiate. Surprisingly, while
WT mice experienced spontaneous remyelination in the fifth week of CPZ treatment?even though the CPZ
diet was maintained up to sixth week?Lgals3−/− mice lacked this capacity and suffered continuous demyelination
up to the sixth week, accompanied by pronounced astroglial activation. Moreover, after 2 weeks of CPZ
treatment, WT and Lgals3−/− mice showed lower innate anxiety as compared with respective naive mice, but
only CPZ-treated Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−fifthweek, as evaluated byMBP immunostaining
and electronicmicroscopy. However, OLG progenitors (OPC) generated in CPZ-treated Lgals3−/− mice
showed diminished arborization, suggesting decreased ability of these cells to differentiate. Surprisingly, while
WT mice experienced spontaneous remyelination in the fifth week of CPZ treatment?even though the CPZ
diet was maintained up to sixth week?Lgals3−/− mice lacked this capacity and suffered continuous demyelination
up to the sixth week, accompanied by pronounced astroglial activation. Moreover, after 2 weeks of CPZ
treatment, WT and Lgals3−/− mice showed lower innate anxiety as compared with respective naive mice, but
only CPZ-treated Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−Lgals3−/− mice
showed diminished arborization, suggesting decreased ability of these cells to differentiate. Surprisingly, while
WT mice experienced spontaneous remyelination in the fifth week of CPZ treatment?even though the CPZ
diet was maintained up to sixth week?Lgals3−/− mice lacked this capacity and suffered continuous demyelination
up to the sixth week, accompanied by pronounced astroglial activation. Moreover, after 2 weeks of CPZ
treatment, WT and Lgals3−/− mice showed lower innate anxiety as compared with respective naive mice, but
only CPZ-treated Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−fifth week of CPZ treatment?even though the CPZ
diet was maintained up to sixth week?Lgals3−/− mice lacked this capacity and suffered continuous demyelination
up to the sixth week, accompanied by pronounced astroglial activation. Moreover, after 2 weeks of CPZ
treatment, WT and Lgals3−/− mice showed lower innate anxiety as compared with respective naive mice, but
only CPZ-treated Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−?Lgals3−/− mice lacked this capacity and suffered continuous demyelination
up to the sixth week, accompanied by pronounced astroglial activation. Moreover, after 2 weeks of CPZ
treatment, WT and Lgals3−/− mice showed lower innate anxiety as compared with respective naive mice, but
only CPZ-treated Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−Lgals3−/− mice showed lower innate anxiety as compared with respective naive mice, but
only CPZ-treated Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−Lgals3−/− mice showed decreased locomotor activity and exhibited spatial working memory
impairment. Expression of Gal-3 increased during CPZ-induced demyelination inmicroglia but not in astrocytes.
While CPZ-treatedWTmice displayed heightenedmicroglial activation associatedwith ED1 expression and pronounced
upregulation of the phagocytic receptor TREM-2b, this effectwas not observed in CPZ-treated Lgals3−/−Lgals3−/−
mice which, in spite of showing an increased number ofmicroglia, these cells evidenced caspase-3 activation