Developmental immunolocalization of the Klotho protein in mouse kidney epithelial cells | Zendy

Ji-Hyun Song | Zendy; M.Y. Lee | Zendy; Y.J. Kim | Zendy; S.R. Park | Zendy; J. Kim | Zendy; SiYun Ryu | Zendy; JuYoung Jung | Zendy

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Developmental immunolocalization of the Klotho protein in mouse kidney epithelial cells

Author(s) -

Ji-Hyun Song,

M.Y. Lee,

Y.J. Kim,

S.R. Park,

J. Kim,

SiYun Ryu,

JuYoung Jung

Publication year - 2014

Publication title -

european journal of histochemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.754

H-Index - 42

eISSN - 2038-8306

pISSN - 1121-760X

DOI - 10.4081/ejh.2014.2256

Subject(s) - klotho , kidney , distal convoluted tubule , nephron , immunohistochemistry , fetus , medicine , endocrinology , kidney development , biology , microbiology and biotechnology , pathology , pregnancy , embryonic stem cell , gene , biochemistry , genetics

A defect in Klotho gene expression in the mouse results in a syndrome that resembles rapid human aging. In this study, we investigated the detailed distribution and the time of the first appearance of Klotho in developing and adult mouse kidney. Kidneys from 16-(F16), 18-(F18) and 20-day-old (F20) fetuses, 1- (P1), 4- (P4), 7- (P7), 14- (P14), and 21-day-old (P21) pups and adults were processed for immunohistochemistry and immunoblot analyses. In the developing mouse kidney, Klotho immunoreactivity was initially observed in a few cells of the connecting tubules (CNT) of 18-day-old fetus (F) and in the medullary collecting duct (MCD) and distal nephron of the F16 developing kidney. In F20, Klotho immunoreactivity was increased in CNT and additionally observed in the outer portion of MCD and tip of the renal papilla. During the first 3 weeks after birth, Klotho-positive cells gradually disappeared from the MCD due to apoptosis, but remained in the CNT and cortical collecting ducts (CCD). In the adult mouse, the Klotho protein was expressed only in a few cells of the CNT and CCD in cortical area. Also, Klotho immunoreactivity was observed in the aquaporin 2-positive CNT, CCD, and NaCl co-transporter-positive distal convoluted tubule (DCT) cells and type B and nonA-nonB intercalated cells of CNT, DCT, and CCD. Collectively, our data indicate that immunolocalization of Klotho is closely correlated with proliferation in the intercalated cells of CNT and CCD from aging, and may be involved in the regulation of tubular proliferation.

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