SOTOMAYOR CLAUDIA ELENA
Congresos y reuniones científicas
Título:
Cell death mediated apoptosis by a Candida albicans infection in Central Nervous System
Autor/es:
PERALTA RAMOS JM; FIGUEREDO CM; MAYOL G; MIRO MS; ICELY PA; CEJAS H; SOTOMAYOR CE
Lugar:
Huerta Grande, Cordoba
Reunión:
Congreso; XXVI Reunión Anual de la Sociedad Argentina de Investigación en Neurociencias, Huerta Grande, Córdoba; 2011
Institución organizadora:
Sociedad Argentina de Neurociencias
Resumen:

Neurocandidiasis is a serious form of bloodstream infection with 50% of mortality, associated

with congenital or acquired immunodeficiencies. With the aim to explore the ethiopathogenic

mechanisms involved in this mycosis, we developed a murine in vivo model. C57Bl/6 mice were

injected iv with 5.105, 1.106 or 2,5.106 viable yeasts of C. albicans and the colonization

assessed 4, 12, 24, 48 and 72h post-infection. Candida was able to impinge, get through the

BBB and settle down in the brain parenchyma as was confirmed by the recovery of the CFU 4h

after the microorganism administration. The immunostaining with anti-GFAP and anti-CD11b

(Astrocytes and Microglia marker respectively), revealed the presence of both reactive astroand

microgliosis (IF). Interestingly, we detected neuronal degeneration associated to the

infection (FJB/A-Cu-Ag stain) and a significant number of TUNEL+ cells. The local balance

between pro- (IL-1â and TNF-á) and anti-inflammatory (TGF-â and IL-10) cytokines indicated a

break-up of the niche homeostasis promoting a Th1 profile (ELISA). This model reproduces

human pathology and provides evidence not reported yet in support of neuronal degeneration

and apoptosis+ and/or pyroptosis+ cells after a systemic induced infection with C. albicans.

in vivo model. C57Bl/6 mice were

injected iv with 5.105, 1.106 or 2,5.106 viable yeasts of C. albicans and the colonization

assessed 4, 12, 24, 48 and 72h post-infection. Candida was able to impinge, get through the

BBB and settle down in the brain parenchyma as was confirmed by the recovery of the CFU 4h

after the microorganism administration. The immunostaining with anti-GFAP and anti-CD11b

(Astrocytes and Microglia marker respectively), revealed the presence of both reactive astroand

microgliosis (IF). Interestingly, we detected neuronal degeneration associated to the

infection (FJB/A-Cu-Ag stain) and a significant number of TUNEL+ cells. The local balance

between pro- (IL-1â and TNF-á) and anti-inflammatory (TGF-â and IL-10) cytokines indicated a

break-up of the niche homeostasis promoting a Th1 profile (ELISA). This model reproduces

human pathology and provides evidence not reported yet in support of neuronal degeneration

and apoptosis+ and/or pyroptosis+ cells after a systemic induced infection with C. albicans.

5, 1.106 or 2,5.106 viable yeasts of C. albicans and the colonization

assessed 4, 12, 24, 48 and 72h post-infection. Candida was able to impinge, get through the

BBB and settle down in the brain parenchyma as was confirmed by the recovery of the CFU 4h

after the microorganism administration. The immunostaining with anti-GFAP and anti-CD11b

(Astrocytes and Microglia marker respectively), revealed the presence of both reactive astroand

microgliosis (IF). Interestingly, we detected neuronal degeneration associated to the

infection (FJB/A-Cu-Ag stain) and a significant number of TUNEL+ cells. The local balance

between pro- (IL-1â and TNF-á) and anti-inflammatory (TGF-â and IL-10) cytokines indicated a

break-up of the niche homeostasis promoting a Th1 profile (ELISA). This model reproduces

human pathology and provides evidence not reported yet in support of neuronal degeneration

and apoptosis+ and/or pyroptosis+ cells after a systemic induced infection with C. albicans.

+ cells. The local balance

between pro- (IL-1â and TNF-á) and anti-inflammatory (TGF-â and IL-10) cytokines indicated a

break-up of the niche homeostasis promoting a Th1 profile (ELISA). This model reproduces

human pathology and provides evidence not reported yet in support of neuronal degeneration

and apoptosis+ and/or pyroptosis+ cells after a systemic induced infection with C. albicans.

â and TNF-á) and anti-inflammatory (TGF-â and IL-10) cytokines indicated a

break-up of the niche homeostasis promoting a Th1 profile (ELISA). This model reproduces

human pathology and provides evidence not reported yet in support of neuronal degeneration

and apoptosis+ and/or pyroptosis+ cells after a systemic induced infection with C. albicans.

+ and/or pyroptosis+ cells after a systemic induced infection with C. albicans.