Biological functions of lysosomal hydrolases during liver fibrosis

Name
(Family, MEROPS ID)
Biological process modulated during liver fibrosis
ApoptosisHSC activationAutophagyInflammationECM remodeling
Cathepsin A
(Ser, S10.002)
--Degradation of LAMP2a restricting chaperone-mediated autophagy in vitro [48]--
Cathepsin B
(Cys, C01.060)
Proteolytic processing of members of the Bcl-2 family in hepatocytes [24]Modulation of pAkt in HSC after PDGF stimulation contributing to their proliferative and migratory capacity [30]Cytosolic cathepsin B, released by autophagic flux, triggers activation of NLRP3 in HSC contributing its activation [36]Participation in the cytotoxic response mediated by TRAIL in NK/NKT cells by an unknown mechanism [39]Collagenolytic activity by an unknown mechanism [43, 44]
Proteolysis of PDGF receptor-β contributing to PDGF-BB desensitization in HSC [31]Modulation NF-κB dependent inflammation in HSC via sirtuin-1 regulation [40]
Cathepsin D
(Asp, A01.009)
Proteolytic cleavage of Bid into t-Bid, upstream mitochondria, triggered by TNF-α in hepatocytes [46]Paracrine activation of cathepsin B in HSC contributing its activation [30]Correlation of cathepsin D and autophagy during DR in cirrhosis by an unknown mechanism [47]--
Cathepsin F
(Cys, C01.018)
-Transcriptional regulation of markers of HSC activation by an unknown mechanism [35]---
Cathepsin H
(Cys, C01.040)
-Modulation of metalloproteinases gene expression in HSC via stabilization of class Iia histone deacetylases [34]---
Cathepsin L
(Cys, C01.032)
----Collagenolytic activity by an unknown mechanism [44]
Cathepsin S
(Cys, C01.034)
---Modulation of NF-κB dependent inflammation in HSC via sirtuin-1 regulation [40]-
Processing of CD74 contributing to antigen presentation in HSC [41]

pAkt: phosphorylated Akt; -: not applicable