Cathepsins


Also found in: Dictionary, Medical.
Related to Cathepsins: Cathepsin L

Cathepsins

 

intracellular proteinases of the hydrolase class that catalyze the hydrolysis of the peptide bond in peptides and proteins.

Cathepsins are widely distributed in animal and plant tissues and in microorganisms. Cathepsins are divided according to the character and specificity of enzymic action into endopeptidases, which are capable of hydrolyzing internal peptide bonds in the molecules of proteins and peptides, and exopeptidases, which act solely on compounds with one or more free terminal carboxyl or amino groups. Cathepsins can also catalyze reactions that may result in lengthening the peptide chain. Almost all cathepsins are activated by compounds containing sulfhydryl groups (cysteine, glutathione).

References in periodicals archive ?
Results: As results, E2 and BPA upregulated the protein expression of vimentin, cathepsin D, and MMP-2, but downregulated the protein expression of E-cadherin via ER signaling pathway, suggesting that E2 and BPA promote EMT and cell migration related gene expressions.
a clinical stage pharmaceutical company with a broad platform of cathepsin protease inhibitors being developed for the treatment of neuropathic pain, autoimmune diseases and fibrosis, today announced the appointment of James Welch as Chief Financial Officer, effective as of June 20, 2014.
and LEO Pharma A/S today announced that their collaboration on the development of an oral treatment for psoriasis has reached an important milestone as Virobay has now initiated a Phase 1 clinical trial of VBY-891 - a selective cathepsin S inhibitor.
Hydrolysis of the FRET substrate by active Cathepsin L results in increase of HiLyte Fluor[TM] 488 fluorescence.
Previous work has linked cathepsins with metastasis of pancreatic cancer, specifically with tumour cell invasion of surrounding tissues and with the establishment of tumour blood supply.
Cathepsin K is a lysosomal cysteine protease that is selectively expressed by osteoclasts and contributes to the breakdown of the bone matrix.
The implications vary because of differences in mode of action; adiponectin regulates hepatic glucose metabolism and has antiinflammatory effects on the vascular wall (4), whereas leptin exhibits systemic effects on appetite and metabolism (3), and the novel adipokines chemerin and cathepsin S affect adipogenesis and atherosclerotic plaque growth and destabilization, respectively (5-7).
Insights into the roles of cathepsins in antigen processing and presentation revealed by specific inhibitors.
VBY-036 is also highly selective against related human cathepsins as well as other enzymes, and sustained cathepsin S inhibition after oral dosing has been demonstrated in vivo through the use of a biomarker.
These endosomes then merge with lysosomes, where lysosomal enzymes, cathepsins B and D, and particularly the cysteine proteases (3) cleave the 66 500-Da albumin into ~500- to 15 000-Da fragments (2, 4).
Cathepsins are implicated in many different diseases and the value of this assay is that it enables the measurement of previously undeterminable cathepsin activity in normal and diseased cells and tissues," noted Platt.