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. 2020 Nov 2;13:157–169. doi: 10.2147/IBPC.S223341

Table 1.

Family Members of MMPs, Their Tissue Distribution, and Main Substrates3

Family MMP Tissue Distribution Main Substrates
1. Collagenases MMP-1 (or Collagenase-1) Endothelium, intima, VSMCs, fibroblasts, vascular adventitia, platelets, varicose veins (interstitial/fibroblast collagenase) Collagen I, II, III, VII, VIII, X, gelatin, aggrecan, serpins
MMP-8 (or Collagenase-2) Macrophages, neutrophils, vascular wall Collagen I, II, III, V, VII, VIII, X, gelatin, fibronectin, aggrecan, elastin
MMP-13 (or Collagenase-3) VSMCs, macrophages, varicose veins, preeclampsia, breast cancer Collagen I, II, III, IV, gelatin, aggrecan, fibronectin, laminin
Mmp-18 (or Collagenase-4) Xenopus (amphibian, Xenopus collagenase) heart, lung, colon Collagen I, II, III, gelatin
2. Gelatinases MMP-2 (or Gelatinase-A, Type IV Collagenase) Endothelium, VSMCs, adventitia, platelets, leukocytes, aortic aneurysm, varicose veins Collagen I, II, III, V, VII, X, XI, gelatin, aggrecan, fibronectin, laminin
MMP-9 (or Gelatinase-B, Type IV Collagenase) Endothelium, VSMCs, adventitia, microvessels, macrophages, aortic aneurysm, varicose veins Collagen IV, V, VII, X, XIV, gelatin, aggrecan, fibronectin, laminin
3. Stromelysins MMP-3 (Stromelysin-1) Endothelium, intima, VSMCs, platelets, coronary artery disease, hypertension, varicose veins, synovial fibroblasts, tumor invasion Collagen II, III, IV, IX, X, XI, gelatin, aggrecan, fibronectin, laminin, elastin
MMP-10 (Stromelysin-2) Atherosclerosis, uterus, preeclampsia, arthritis, carcinoma cells Collagen III, IV, V, gelatin, aggrecan, fibronectin, laminin
MMP-11 (Stromelysin-3) Brain, uterus, angiogenesis Aggrecan, fibronectin, laminin
4. Matrilysins MMP-7 (Matrilysin-1) Endothelium, intima, VSMCs, uterus, varicose veins Collagen IV, X, aggrecan, fibronectin, laminin, elastin
MMP-26 (Matrilysin-2, Endometase) Breast cancer, endometrial tumors Collagen IV, gelatin,
5. Membrane Type MMP-14 (MT1-MMP) VSMCs, fibroblasts, platelets, brain, uterus, angiogenesis Collagen I, II, III, aggrecan, elastin, fibrin, fibronectin, laminin
MMP-15 (MT2-MMP) Fibroblasts, leukocytes, preeclampsia Collagen I, gelatin, aggrecan, fibronectin, laminin
MMP-16 (MT3-MMP) Leukocytes, angiogenesis Collagen I, aggrecan, fibronectin, laminin
MMP-17 (MT4-MMP) Brain, breast cancer Gelatin
MMP-24 (MT5-MMP) Leukocytes, lung, pancreas, kidney, brain, astrocytoma, glioblastoma Gelatin
MMP-25 (MT6-MMP) Leukocytes (Leukolysin), anaplastic astrocytomas, glioblastomas Collagen IV, gelatin
6. Other MMPs MMP-12 (Metalloelastase) VSMCs, fibroblasts, macrophages, great saphenous vein Collagen IV, gelatin
MMP-19 (RASI-1) Liver Collagen I, IV, gelatin
MMP-20 (Enamelysin) Tooth enamel Collagen V
Mmp-21 (Xenopus-Mmp) Fibroblasts, macrophages, placenta
Mmp-22 (Chicken-Mmp) Chicken fibroblasts Gelatin
MMP-23 (CA-MMP) Ovary, testis, prostate
Other (type II) MT-MMP
Gelatin
MMP-27 (Human MMP-22 homolog) Heart, leukocytes, macrophages, kidney, endometrium, menstruation, bone, osteoarthritis, breast cancer
MMP-28 (Epilysin) Skin, keratinocytes

Notes: Although MMPs are classified by their substrate specificity, many of these also share proteolytic activity of the same targets, such as collagen, gelatin, and elastin. Data from Visse et al and Cui et al.2,3

Abbreviations: MMPs, matrix metalloproteinases; VSMCs, vascular smooth muscle cells.