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2008 ; 322
(5902
): 756-60
Nephropedia Template TP
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Deletion of Trpm7 disrupts embryonic development and thymopoiesis without
altering Mg2+ homeostasis
#MMPMID18974357
Jin J
; Desai BN
; Navarro B
; Donovan A
; Andrews NC
; Clapham DE
Science
2008[Oct]; 322
(5902
): 756-60
PMID18974357
show ga
The gene transient receptor potential-melastatin-like 7 (Trpm7) encodes a protein
that functions as an ion channel and a kinase. TRPM7 has been proposed to be
required for cellular Mg2+ homeostasis in vertebrates. Deletion of mouse Trpm7
revealed that it is essential for embryonic development. Tissue-specific deletion
of Trpm7 in the T cell lineage disrupted thymopoiesis, which led to a
developmental block of thymocytes at the double-negative stage and a progressive
depletion of thymic medullary cells. However, deletion of Trpm7 in T cells did
not affect acute uptake of Mg2+ or the maintenance of total cellular Mg2+.
Trpm7-deficient thymocytes exhibited dysregulated synthesis of many growth
factors that are necessary for the differentiation and maintenance of thymic
epithelial cells. The thymic medullary cells lost signal transducer and activator
of transcription 3 activity, which accounts for their depletion when Trpm7 is
disrupted in thymocytes.
|*Embryonic Development
[MESH]
|*Lymphopoiesis
[MESH]
|Animals
[MESH]
|Gene Deletion
[MESH]
|Homeostasis
[MESH]
|Hyaluronan Receptors/metabolism
[MESH]
|Intercellular Signaling Peptides and Proteins/genetics/metabolism
[MESH]