TABLE 2

Examples of currently available drugs modulating ECM metabolism beyond primary target

Drug Primary Mechanism of Action Effect on ECM metabolism
Anti-inflammatory and immunomodulatory drugs
   Corticosteroids
      e.g., hydrocortisone, prednisone, dexamethasone Various genomic and nongenomic mechanisms of action (Stahn et al., 2007) Modulation of the expression of various types of collagen (Oikarinen et al., 1987; Russell et al., 1989; Oishi et al., 2002), elastin (Del Monaco et al., 1997), proteoglycans decorin and biglycan (Kähäri et al., 1995), HA (Saarni and Hopsu-Havu, 1978), and various noncollagenous matrix glycoproteins such as fibronectin, laminin, and tenascin (Dean et al., 1988; Simo et al., 1992; Ekblom et al., 1993); suppression of MMP synthesis and activity (DiBattista et al., 1991; Sadowski and Steinmeyer, 2001); influence on TIMP expression and activity (Sadowski and Steinmeyer, 2001)
   NSAIDs
      e.g., indomethacin, diclofenac, naproxen, and -coxibs such as celecoxib Inhibition of cyclooxygenase enzymes -1 and -2 (Gasparini et al., 2003) Modulation of the synthesis of fibronectin (Ernst et al., 1995), various types of collagen (Ernst et al., 1995; Liu et al., 2007), large chondroitin sulfate proteoglycans (Okada et al., 1994), and HA (Sussmann et al., 2004); suppression of MMP expression, synthesis, and activity (Sadowski and Steinmeyer, 2001; Pavlovic et al., 2006)
   Other immunosuppressive drugs
      Cyclosporine A Calcineurin inhibitor (Ho et al., 1996) Differential effect on collagen synthesis and fibrosis (Eickelberg et al., 2001; Fornoni et al., 2001; Waller et al., 2004); inhibition of MMP activity (Fornoni et al., 2001; Chiu et al., 2009; Saygili et al., 2009)
      Leflunomide Pyrimidine synthesis inhibitor (Fukushima et al., 2007) Inhibitory effect on fibrogenesis (Yao et al., 2004; Si et al., 2007)
      Methotrexate Inhibitor of dihydrofolate reductase (Warren et al., 2008) Reduction of type IV collagen synthesis and ECM expansion (Yozai et al., 2005); influence on MMP and TIMP production (Seitz and Dayer, 2000; Fiedorczyk et al., 2006).
      Sirolimus/ rapamycin Mammalian target of rapamycin (mTOR) inhibitor (Sehgal, 2003; Granville et al., 2006) Blocking of the synthesis of fibrillin-1 (Schaefer et al., 2007); blocking of HA accumulation (Gouëffic et al., 2007); inhibition of growth factor induced collagen synthesis (Park et al., 2005)
      Tacrolimus Calcineurin inhibitor (Nghiem et al., 2002) Suppression of cytokine stimulated MMP synthesis (Migita et al., 2005); stimulation of collagen synthesis in vascular smooth muscle cells via TGF-β signaling (Giordano et al., 2008)
   Microbial drugs
      Doxycycline Antimicrobial drug Inhibition of specific MMPs (Golup et al., 1998; Ahuja, 2003; Clark et al., 2008)
      Minocycline Antimicrobial drug Inhibition of specific MMPs (Sutton et al., 2005; Machado et al., 2006)
   Cytokine modulators
      Etanercept Inhibition of TNF-α receptor (Moreland, 1999) Modulation of type II collagen synthesis and degradation (Briot et al., 2008)
      Infliximab, adalimumab Inhibition of TNF-α (Moreland, 1999) Inhibition of fibrosis (Sorrentino et al., 2007); downregulation of tissue degrading MMPs (Wendling et al, 2008; Di Sabatino et al., 2009)
      Thalidomide Inhibitory action on TNF-α (Moreira et al., 1993) Attenuation of fibrosis (Chong et al., 2006; Yndestad et al., 2006); influence on endostatin level (Aydoğan et al., 2007)
Other drugs
   ACE-inhibitors
      e.g., Captopril, enalapril and numerous other ones Blocking of angiotensin converting enzyme (Johnston and Jackson, 1983) Modulation of collagen and proteoglycan synthesis and fibrosis (Kaneto et al., 1994; Cruz et al., 2000; Wapstra et al., 2001); influence on MMPs (Rizzoni et al., 2004; Aoki et al., 2007; Okada et al., 2008)
   ATR-blockers
      e.g., Losartan and numerous other ones Blocking of angiotensin II receptor (Gavras and Salerno, 1996) Upregulation of thrombospondin-1 expression (Fischer et al., 2001); downregulation of fibronectin expression (Fischer et al., 2001); inhibition of CTGF and fibrosis (Rupérez et al., 2003); inhibition of specific MMPs and TIMPs (Masutomo et al., 2001; Saygili et al., 2009)
   Calcium channel blockers
      e.g., Amlodipine, felodipine, diltiazem, and verapamil Blocking of the L-type calcium channel (Mason et al., 2003) Inhibition of collagen expression and accumulation (Roth et al., 1996; Sugiura et al., 2000); modulation of MMP activity (Roth et al., 1996; Wada et al., 2001)
   Calcium sensitizing drugs
      e.g., Levosimendan Calcium-sensitizer (Ng, 2004) Reduction of MMP-2 (Tziakas et al., 2005)
   Endothelin receptor antagonists
      e.g., Bosentan Endothelin-1 inhibitor (Motte et al., 2006) Upregulation of MMP-9 (Giannelli et al., 2005); downregulation of fibronectin (Siddiqui et al., 2006)
   Statins
      e.g., Simvastatin, atorvastatin, and numerous other ones Inhibition of HMG-CoA reductase (Vaughan and Gotto, 2004) Inhibition of collagen and CTGF production (Martin et al., 2005; Rupérez et al., 2007); reduction of HA accumulation (Sakr et al., 2008); reduction of MMP-9 synthesis (Kalyanasundaram et al., 2006)
      Tranilast Histamine H1 receptor antagonist (Namazi and Soma, 2005) Inhibition of collagen synthesis (Yamada et al., 1994) and accumulation (Isaji et al., 1987)
   Tyrosine kinase inhibitors
      e.g., Imatinib Specific tyrosine kinase inhibitor (Lydon and Druker, 2004) Blocking of the stimulation of TGF-β induced collagen gene expression (Bhattacharyya et al., 2009)
  • HA, hyaluronan