Thyrotropin-Releasing hormone (TRH)-degrading pyroglutamyl peptidase I (PGP I) and prolylendopeptidase (PE) activities have been demonstrated in rat insulinoma RINm 5F cell line. These two enzymes catalyze the conversion of TRH to Histydyl-Proline-Diketopiperazine and to acid TRH respectively. After
BACKGROUND
Somatostatin receptor subtype 5 (SSTR5) mediates the inhibitory effect of somatostatin on insulin expression/secretion and cell proliferation. A number of single nucleotide polymorphisms (SNPs) of SSTR5 have been identified, including P335L, a nonsynonymous SNP located in the protein
OBJECTIVE
To report a new mutation of the multiple endocrine neoplasia type 1 (MEN1) gene in an Italian kindred.
METHODS
The study included the female proband, aged 50 years, affected by primary hyperparathyroidism, insulinoma and prolactinoma, and ten relatives. Blood samples were obtained for
Angiotensin I-converting enzyme (ACE) inhibitory peptides, Ala-Pro, Lys-Pro, and Arg-Pro, were isolated from fermented fish sauce. Five other proline-containing dipeptides having weak ACE inhibitory activity were also isolated from the fermented fish sauce. Orally administered Lys-Pro showed a
BACKGROUND
The loss of beta cells in type 1 diabetes may involve protein kinases because they control cell growth, differentiation, and survival. Previous studies have revealed that GTK, a Src-like protein tyrosine kinase expressed in beta cells (also named Bsk/Iyk), regulates multiple responses
An 85-kDa Group VI phospholipase A2 enzyme (iPLA2) that does not require Ca2+ for catalysis has recently been cloned from three rodent species. A homologous 88-kDa enzyme has been cloned from human B-lymphocyte lines that contains a 54-amino acid insert not present in the rodent enzymes, but human
BACKGROUND
Autoantibodies (A) against Neuropeptide Y (NPY), was reported in 9% newly diagnosed type 1 diabetes (T1D) patients. A single nucleotide polymorphism (SNP) at rs16139 (T1128C) within the NPY-gene identified an amino acid substitution from leucine (L) to proline (P) (L7P) associated with
A substraction library was constructed from mouse insulinoma (betaTC-1) and glucagonoma (alphaTC-1) cell lines. Differential screening and sequencing revealed a novel cDNA clone, IA-4, which was expressed in the islets of Langerhans and the brain. IA-4 cDNA is 1,007 bp in length and predicts a
Here we describe the isolation and characterization of the mouse homolog of the human zinc-finger transcription factor INSM1 (IA-1) and identify an interacting protein. A 2.9-kb cDNA with an open reading frame of 1563 nucleotides, corresponding to a translated protein of 521 amino acids, was
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