Endocrine Abstracts

The thyroid hormone receptor (TR) belongs to a family of transcription factors which activity is modulated by the presence or absence of their particular ligand. Additionally, the transcriptional activity of TR is modulated by post-translational modifications such as phosphorylation, acetylation or ubiquitination. Here, I investigate whether TR might also be regulated by sumoylation. Sumoylation of transcription factors at defined lysine residues often leads to an alteration o...

Introduction: Cellular differentiation and development of germ cells critically depend on a coordinated activation and repression of specific genes. The underlying regulation mechanisms, however, are largely unknown. Here, we describe the interplay between two transcription factors to be critical for cell type-specific expression in testis.Methods: We investigated the binding of CREMτ (cAMP response element modulator tau) and GCNF (germ cell nuclear...

Liver fatty acid-binding protein (LFABP) is a 14 kDa cytoplasmatic protein found in hepatocytes and enterocytes of the small intestine. It binds long chain fatty acids (LCFA) and other hydrophobic ligands and is thought to play an important role in intracellular LCFA transport.We investigated the regulation of LFABP gene expression by thyroid hormone (T3) and peroxisome proliferator-activated receptor alpha (PPARalpha) ligand clofibric acid.<p class=...

The FAD-dependent, mitochondrial glycerol-3-phosphate dehydrogenase (mGPDH) is essential for the transport of reducing equivalents derived from glycolysis (or in sperm fructolysis) into the mitochondrial compartment for the synthesis of ATP. It has been shown that multiple (three) promoters of the mGPDH exist so that the expression is regulated in a tissue-restricted manner. Promoter A is expressed in brain, brown adipose tissue and pancreas, promoter B is ubiquitous and promo...