Glucose and insulin are needed for optimal defensin expression in human cell lines.

Abstract:

:Many infections are associated with diabetes, as the ability of the body to fight pathogens is impaired. Recently, low levels of defensins have been found in diabetic rodents. However, whether hyperglycemia and/or insulin deficiency/insensitivity is the reason for the reduced defensin levels is still unknown. To study the functionality of the innate immune system during hyperglycemia, the expression levels of human beta-defensin-1 (hBD-1) was measured in human embryonic kidney (HEK-293) and colon adenocarcinoma (HCT-116) cells treated with different concentrations of glucose and insulin. Increasing concentrations of glucose enhanced hBD-1 expression and these levels were further elevated after insulin treatment. Insulin treatment also led to the up-regulation of human sodium/glucose transporter 1 (hSGLT1), which further increases intracellular glucose levels. Thus, our findings suggest for the first time that insulin signaling is important for hBD-1 optimal expression by elevating intracellular glucose levels and by mediating gene expression.

authors

Barnea M,Madar Z,Froy O

doi

10.1016/j.bbrc.2007.12.158

subject

Has Abstract

pub_date

2008-03-07 00:00:00

pages

452-6

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(07)02819-7

journal_volume

367

pub_type

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