Granulins are a family of secreted, glycosylated peptides that are cleaved from a single precursor protein with 7.5 repeats of a highly conserved 12-cysteine granulin/epithelin motif. The 88 kDa precursor protein, progranulin, is also called proepithelin and prostate cancer (PC) cell-derived growth factor. Cleavage of the signal peptide produces mature granulin which can be further cleaved into a variety of active, 6 kDa peptides. These smaller cleavage products are named granulin A, granulin B, granulin C, etc. Epithelins 1 and 2 are synonymous with granulins A and B, respectively.
Function
Both the peptides and intact granulin protein regulate cell growth. However, different members of the granulin protein family may act as inhibitors, stimulators, or have dual actions on cell growth. Granulin family members are important in normal development, wound healing, and tumorigenesis.[3]
Clinical significance
The human liver fluke (Opisthorchis viverrini) contributes to the development of bile duct (liver) cancer by secreting a granulin-like growth hormone.[4]
Mutations in the GRN gene have been implicated in up to 25% of frontotemporal lobar degeneration, inherited in an autosomal dominant fashion with high penetrance.[5] Several loss-of-function mutations disease-causing mutations in GRN have been identified.[6][7]
↑Bhandari V, Bateman A (October 1992). "Structure and chromosomal location of the human granulin gene". Biochemical and Biophysical Research Communications. 188 (1): 57–63. doi:10.1016/0006-291X(92)92349-3. PMID1417868.
↑Mackenzie IR (July 2007). "The neuropathology and clinical phenotype of FTD with progranulin mutations". Acta Neuropathologica. 114 (1): 49–54. doi:10.1007/s00401-007-0223-8. PMID17458552.
↑Baker M, Mackenzie IR, Pickering-Brown SM, Gass J, Rademakers R, Lindholm C, Snowden J, Adamson J, Sadovnick AD, Rollinson S, Cannon A, Dwosh E, Neary D, Melquist S, Richardson A, Dickson D, Berger Z, Eriksen J, Robinson T, Zehr C, Dickey CA, Crook R, McGowan E, Mann D, Boeve B, Feldman H, Hutton M (August 2006). "Mutations in progranulin cause tau-negative frontotemporal dementia linked to chromosome 17". Nature. 442 (7105): 916–9. Bibcode:2006Natur.442..916B. doi:10.1038/nature05016. PMID16862116.
↑Cruts M, Gijselinck I, van der Zee J, Engelborghs S, Wils H, Pirici D, Rademakers R, Vandenberghe R, Dermaut B, Martin JJ, van Duijn C, Peeters K, Sciot R, Santens P, De Pooter T, Mattheijssens M, Van den Broeck M, Cuijt I, Vennekens K, De Deyn PP, Kumar-Singh S, Van Broeckhoven C (August 2006). "Null mutations in progranulin cause ubiquitin-positive frontotemporal dementia linked to chromosome 17q21". Nature. 442 (7105): 920–4. Bibcode:2006Natur.442..920C. doi:10.1038/nature05017. PMID16862115.
↑Nielsen SR, Quaranta V, Linford A, Emeagi P, Rainer C, Santos A, Ireland L, Sakai T, Sakai K, Kim YS, Engle D, Campbell F, Palmer D, Ko JH, Tuveson DA, Hirsch E, Mielgo A, Schmid MC (May 2016). "Macrophage-secreted granulin supports pancreatic cancer metastasis by inducing liver fibrosis". Nature Cell Biology. 18 (5): 549–60. doi:10.1038/ncb3340. PMID27088855.
↑Faber I, Prota JR, Martinez AR, Lopes-Cendes I, França MC (January 2017). "A new phenotype associated with homozygous GRN mutations: complicated spastic paraplegia". European Journal of Neurology. 24 (1): e3–e4. doi:10.1111/ene.13194. PMID28000352.
↑Zhou Y, Li L, Liu Q, Xing G, Kuai X, Sun J, Yin X, Wang J, Zhang L, He F (May 2008). "E3 ubiquitin ligase SIAH1 mediates ubiquitination and degradation of TRB3". Cellular Signalling. 20 (5): 942–8. doi:10.1016/j.cellsig.2008.01.010. PMID18276110.
Further reading
Eriksen JL, Mackenzie IR (January 2008). "Progranulin: normal function and role in neurodegeneration". Journal of Neurochemistry. 104 (2): 287–97. doi:10.1111/J.1471-4159.2007.04968.X. PMID17953663.
Serrero G (August 2003). "Autocrine growth factor revisited: PC-cell-derived growth factor (progranulin), a critical player in breast cancer tumorigenesis". Biochemical and Biophysical Research Communications. 308 (3): 409–13. doi:10.1016/S0006-291X(03)01452-9. PMID12914763.
Mackenzie IR (July 2007). "The neuropathology and clinical phenotype of FTD with progranulin mutations". Acta Neuropathologica. 114 (1): 49–54. doi:10.1007/s00401-007-0223-8. PMID17458552.
Pickering-Brown SM (July 2007). "Progranulin and frontotemporal lobar degeneration". Acta Neuropathologica. 114 (1): 39–47. doi:10.1007/s00401-007-0241-6. PMID17572900.
Plowman GD, Green JM, Neubauer MG, Buckley SD, McDonald VL, Todaro GJ, Shoyab M (June 1992). "The epithelin precursor encodes two proteins with opposing activities on epithelial cell growth". The Journal of Biological Chemistry. 267 (18): 13073–8. PMID1618805.
Bateman A, Belcourt D, Bennett H, Lazure C, Solomon S (December 1990). "Granulins, a novel class of peptide from leukocytes". Biochemical and Biophysical Research Communications. 173 (3): 1161–8. doi:10.1016/S0006-291X(05)80908-8. PMID2268320.
Maruyama K, Sugano S (January 1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID8125298.
Baba T, Hoff HB, Nemoto H, Lee H, Orth J, Arai Y, Gerton GL (March 1993). "Acrogranin, an acrosomal cysteine-rich glycoprotein, is the precursor of the growth-modulating peptides, granulins, and epithelins, and is expressed in somatic as well as male germ cells". Molecular Reproduction and Development. 34 (3): 233–43. doi:10.1002/mrd.1080340302. PMID8471244.
Zhou J, Gao G, Crabb JW, Serrero G (May 1993). "Purification of an autocrine growth factor homologous with mouse epithelin precursor from a highly tumorigenic cell line". The Journal of Biological Chemistry. 268 (15): 10863–9. PMID8496151.
Andersson B, Wentland MA, Ricafrente JY, Liu W, Gibbs RA (April 1996). "A "double adaptor" method for improved shotgun library construction". Analytical Biochemistry. 236 (1): 107–13. doi:10.1006/abio.1996.0138. PMID8619474.
Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, Suyama A, Sugano S (October 1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID9373149.
Trinh DP, Brown KM, Jeang KT (March 1999). "Epithelin/granulin growth factors: extracellular cofactors for HIV-1 and HIV-2 Tat proteins". Biochemical and Biophysical Research Communications. 256 (2): 299–306. doi:10.1006/bbrc.1999.0317. PMID10079180.
He Z, Bateman A (July 1999). "Progranulin gene expression regulates epithelial cell growth and promotes tumor growth in vivo". Cancer Research. 59 (13): 3222–9. PMID10397269.
Thornton MA, Poncz M, Korostishevsky M, Yakobson E, Usher S, Seligsohn U, Peretz H (September 1999). "The human platelet alphaIIb gene is not closely linked to its integrin partner beta3". Blood. 94 (6): 2039–47. PMID10477733.