Section of Diabetes and Endocrinology

Oklahoma City, OK, United States

Section of Diabetes and Endocrinology

Oklahoma City, OK, United States
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Bettini M.L.,St Jude Childrens Research Hospital | Chou P.-C.,St Jude Childrens Research Hospital | Guy C.S.,St Jude Childrens Research Hospital | Lee T.,Section of Diabetes and Endocrinology | And 5 more authors.
Journal of Immunology | Year: 2017

For the ab or gdTCR chains to integrate extracellular stimuli into the appropriate intracellular cellular response, they must use the 10 ITAMs found within the CD3 subunits (CD3ge, CD3de, and zz) of the TCR signaling complex. However, it remains unclear whether each specific ITAM sequence of the individual subunit (gedz) is required for thymocyte development or whether any particular CD3 ITAM motif is sufficient. In this article, we show that mice utilizing a single ITAM sequence (g, e, d, za, zb, or zc) at each of the 10 ITAM locations exhibit a substantial reduction in thymic cellularity and limited CD42CD82 (doublenegative) to CD4+CD8+ (double-positive) maturation because of low TCR expression and signaling. Together, the data suggest that ITAM sequence diversity is required for optimal TCR signal transduction and subsequent T cell maturation. Copyright © 2017 by The American Association of Immunologists, Inc.


Tryggestad J.B.,Section of Diabetes and Endocrinology | Li S.,University of Oklahoma | Chernausek S.D.,Section of Diabetes and Endocrinology
Journal of Medical Case Reports | Year: 2013

Introduction. Arhinia, congenital absence of the nose, is a rare malformation. We present the third reported case of arhinia accompanied by hypogonadism and demonstrate that this is due to gonadotropin deficiency. Case presentation. A 13-year-old Caucasian boy with congenital arhinia presented for evaluation of delayed puberty and micropenis. We examined genes known to be associated with hypogonadotropic hypogonadism for mutations and performed a chromosomal microarray to assess copy number variation. Conclusion: No mutations in KAL1, FGFR1, PROK2, PROKR2, FGF8, CHD7 and GnRHR were identified in our patient and there were no copy number variations observed that would explain the phenotype. Though studies are limited in such patients, we suggest that hypogonadotropic hypogonadism is associated with arhinia and that the two entities likely result from a common genetic cause that affects early nasal development and gonadotropin-releasing hormone neuron formation or migration. © 2013 Tryggestad et al; licensee BioMed Central Ltd.


PubMed | Section of Diabetes and Endocrinology
Type: | Journal: Journal of medical case reports | Year: 2013

Arhinia, congenital absence of the nose, is a rare malformation. We present the third reported case of arhinia accompanied by hypogonadism and demonstrate that this is due to gonadotropin deficiency.A 13-year-old Caucasian boy with congenital arhinia presented for evaluation of delayed puberty and micropenis. We examined genes known to be associated with hypogonadotropic hypogonadism for mutations and performed a chromosomal microarray to assess copy number variation.No mutations in KAL1, FGFR1, PROK2, PROKR2, FGF8, CHD7 and GnRHR were identified in our patient and there were no copy number variations observed that would explain the phenotype. Though studies are limited in such patients, we suggest that hypogonadotropic hypogonadism is associated with arhinia and that the two entities likely result from a common genetic cause that affects early nasal development and gonadotropin-releasing hormone neuron formation or migration.

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