Expression of heat shock protein 27 in developing and adult human kidney

Toxicology Letters
W KhanJ H Todd

Abstract

The expression of heat shock protein (hsp) 27 was examined in the developing and adult human kidney. Immunolocalization using a monoclonal antibody against human hsp 27 demonstrated immunoreactivity in both the developing and adult kidney. Low to moderate immunoreactivity for hsp 27 was observed in the fetal and adult proximal tubule, distal tubule, and mesangial cells of the glomeruli. Intense immunoreactivity for hsp 27 was localized to the cortical and medullary collecting ducts in both the adult and fetal kidney, with the most intense staining in the medullary regions. The loop of Henle demonstrated no immunoreactivity for hsp 27. The blastemal element of the developing kidney showed no hsp immunostaining and the ureteric bud demonstrated moderate staining. Western, northern, and reverse transcription-polymerase chain reaction (RT-PCR) analyses disclosed no significant differences in hsp 27 mRNA or protein level as a function of gestational age. An analysis of the phosphorylation state of hsp 27 showed the majority of hsp 27 to be present in the unphosphorylated isoform for both adult and fetal samples. These studies are the first to demonstrate the presence of hsp 27 in the human kidney. It is suggested that this pool of h...Continue Reading

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Jan 23, 2003·Current Urology Reports·R William G WatsonJohn M Fitzpatrick
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