The role of heme-oxygenase-1 in pathogenesis of cerebral malaria in the co-culture model of human brain microvascular endothelial cell and ITG Plasmodium falciparum-infected red blood cells.

Abstract:

OBJECTIVE:To investigate the role of human host heme-oxygenase-1 (HO-1) in pathogenesis of cerebral malaria in the in vitro model. METHODS:The effect of human host HO-1 [human brain microvascular endothelial cell (HBMEC)] on hemoglobin degradation in the co-culture model of HBMEC and ITG Plasmodium falciparum-infected red cells (iRBC) through measurement of the enzymatic products iron and bilirubin. RESULTS:Following exposure to the HO-1 inducer CoPPIX at all concentrations, the HBMEC cells apoptosis occurred, which could be prominently observed at 15 μM of 3 h exposure. In contrast, there was no significant change in the morphology in the non-exposed iRBC at all concentrations and exposure time. This observation was in agreement with the levels of the enzymatic degradation products iron and bilirubin, of which the highest levels (106.03 and 1753.54% of baseline level, respectively) were observed at 15 μM vs. 20 μM at 3 h vs. 24 h exposure. For the effect of the HO-1 inhibitor ZnPPIX, HBMEC cell morphology was mostly unchanged, but significant inhibitory effect on cell apoptosis was seen at 10 μM for the exposure period of 3 h (37.17% of baseline level). The degree of the inhibitory effect as reflected by the level of iron produced was not clearly observed (highest effect at 10 μM and 3 h exposure). CONCLUSIONS:Results provide at least in part, insight into the contribution of HO-1 on CM pathogenesis and need to be confirmed in animal model.

journal_name

Asian Pac J Trop Med

authors

Thongdee P,Na-Bangchang K

doi

10.1016/j.apjtm.2016.11.011

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

20-24

issue

1

eissn

1995-7645

issn

2352-4146

pii

S1995-7645(16)30727-1

journal_volume

10

pub_type

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