Protein Information

Name Smad (protein family or complex)
Synonyms SMAD; SMAD, mothers against DPP homolog; SMAD, mothers against DPP homologs; Smad

Compound Information

Name SMA
CAS sodium 2-chloroacetate

Reference List

PubMed Abstract RScore(About this table)
20233786 Corpuz PS, Lindaman LL, Mellon PL, Coss D: FoxL2 Is Required for Activin Induction of the Mouse and Human Follicle-Stimulating Hormone {beta}-Subunit Genes. Mol Endocrinol. 2010 Mar 16.

We identify FoxL2 as a critical component in activin induction of FSHbeta, both for the mouse gene, induction of which is Sma- and Mad-related protein (Smad) dependent, and for the human gene that is Smad independent.
6(0,0,1,1) Details
20160437 Hu Y, Liang H, Du Y, Zhu Y, Wang X: Curcumin Inhibits Transforming Growth Factor-beta Activity via Inhibition of Smad Signaling in HK-2 Cells. Am J Nephrol. 2010 Feb 17;31(4):332-341.

4(0,0,0,4) Details
18552272 Liu Q, Mao H, Nie J, Chen W, Yang Q, Dong X, Yu X: Transforming growth factor {beta}1 induces epithelial-mesenchymal transition by activating the JNK-Smad3 pathway in rat peritoneal mesothelial cells. Perit Dial Int. 2008 Jun;28 Suppl 3:S88-95.


Phosphorylation of Smad proteins is required for TGFbeta1-induced EMT.
3(0,0,0,3) Details
20193171 Liu JQ, Hu DH, Zhang ZF, Guan H, She T, Zhang J, Bai XZ: [Effects of interferon-gamma on the transforming growth factor beta/Smad pathway in keloid-derived fibroblasts]. Zhonghua Shao Shang Za Zhi. 2009 Dec;25(6):454-9.

3(0,0,0,3) Details
19516008 Dawes LJ, Sleeman MA, Anderson IK, Reddan JR, Wormstone IM: TGFbeta/Smad4-dependent and -independent regulation of human lens epithelial cells. Invest Ophthalmol Vis Sci. 2009 Nov;50(11):5318-27. Epub 2009 Jun 10.


The primary objective of the study was to determine the importance of Smad4 in TGFbeta2-induced transdifferentiation, matrix contraction, and Smad signaling by human lens epithelial cells.
3(0,0,0,3) Details
18502066 Yang Y, Yang S, Chen M, Zhang X, Zou Y, Zhang X: Compound Astragalus and Salvia miltiorrhiza Extract exerts anti-fibrosis by mediating TGF-beta/Smad signaling in myofibroblasts. J Ethnopharmacol. 2008 Jul 23;118(2):264-70. Epub 2008 Apr 18.

2(0,0,0,2) Details
18065393 Jeon ES, Moon HJ, Lee MJ, Song HY, Kim YM, Cho M, Suh DS, Yoon MS, Chang CL, Jung JS, Kim JH: Cancer-derived lysophosphatidic acid stimulates differentiation of human mesenchymal stem cells to myofibroblast-like cells. Stem Cells. 2008 Mar;26(3):789-97. Epub 2007 Dec 6.


LPA elicited phosphorylation of Smad2/3, and siRNA-mediated depletion of endogenous Smad2/3 or adenoviral expression of Smad7, an inhibitory Smad, abrogated the LPA induced expression of alpha-SMA and phosphorylation of Smad2/3.
2(0,0,0,2) Details
19193641 Webber J, Meran S, Steadman R, Phillips A: Hyaluronan orchestrates transforming growth factor-beta1-dependent maintenance of myofibroblast phenotype. J Biol Chem. 2009 Apr 3;284(14):9083-92. Epub 2009 Feb 4.


Similarly inhibition of HAS2 by short interfering RNA prevented phenotypic activation without altering TGF-beta1-dependent Smad phosphorylation, thus suggesting that HA-dependent regulation of cell phenotype was independent of Smad activation.
2(0,0,0,2) Details
18631173 Vardouli L, Vasilaki E, Papadimitriou E, Kardassis D, Stournaras C: A novel mechanism of TGFbeta-induced actin reorganization mediated by Smad proteins and Rho GTPases. FEBS J. 2008 Aug;275(16):4074-87. Epub 2008 Jul 9.

2(0,0,0,2) Details
18448597 Huang XR, Chung AC, Wang XJ, Lai KN, Lan HY: Mice overexpressing latent TGF-beta1 are protected against renal fibrosis in obstructive kidney disease. Am J Physiol Renal Physiol. 2008 Jul;295(1):F118-27. Epub 2008 Apr 30.


Transforming growth factor (TGF)-beta1, once activated, binds to its receptors and mediates renal fibrosis via the downstream Smad signaling pathway.
1(0,0,0,1) Details
19543302 Yan JD, Yang S, Zhang J, Zhu TH: BMP6 reverses TGF-beta1-induced changes in HK-2 cells: implications for the treatment of renal fibrosis. Acta Pharmacol Sin. 2009 Jul;30(7):994-1000. Epub 2009 Jun 22.


MMP-2 activity was analyzed by zymography, whereas the activation of the MAPKs and Smad signaling were analyzed using Western blot assays and a reporter gene assay, respectively.
1(0,0,0,1) Details
18988920 Shukla MN, Rose JL, Ray R, Lathrop KL, Ray A, Ray P: Hepatocyte growth factor inhibits epithelial to myofibroblast transition in lung cells via Smad7. Am J Respir Cell Mol Biol. 2009 Jun;40(6):643-53. Epub 2008 Nov 6.


HGF also induced the nuclear export of Smad7 and Smad ubiquitin regulatory factor 1 (Smurf1) to the cytoplasm.
1(0,0,0,1) Details
20089843 Tsapara A, Luthert P, Greenwood J, Hill CS, Matter K, Balda MS: The RhoA activator GEF-H1/Lfc is a transforming growth factor-beta target gene and effector that regulates alpha-smooth muscle actin expression and cell migration. Mol Biol Cell. 2010 Mar;21(6):860-70. Epub 2010 Jan 20.


Cellular TGF-beta responses are stimulated by different signal transduction pathways: some are Smad dependent and others Smad independent.
1(0,0,0,1) Details
18655827 Kim YM, Jeon ES, Kim MR, Lee JS, Kim JH: Bradykinin-induced expression of alpha-smooth muscle actin in human mesenchymal stem cells. Cell Signal. 2008 Oct;20(10):1882-9. Epub 2008 Jul 4.


Pretreatment with a TGF-beta type I receptor kinase inhibitor (SB-431542), small interfering RNA-mediated depletion of endogenous Smad2, or adenoviral expression of Smad7 (an inhibitory Smad isoform) all blocked BK-induced alpha-SMA expression and Smad2 phosphorylation.
1(0,0,0,1) Details
17923018 Xu GP, Li QQ, Cao XX, Chen Q, Zhao ZH, Diao ZQ, Xu ZD: [Effect of Smad7 on transforming growth factor-beta1-induced alveolar epithelial to mesenchymal transition]. Zhonghua Yi Xue Za Zhi. 2007 Jul 17;87(27):1918-23.


CONCLUSION: Under TGF beta1 treatment, RLE-6TN undergoes a conversion process into myofibroblasts in vitro with the conversion mechanism related to Smad signaling pathway, and transfection of Smad7 gene can partly reverse this process.
1(0,0,0,1) Details
19847872 Guo H, Leung JC, Cheung JS, Chan LY, Wu EX, Lai KN: Non-viral Smad7 gene delivery and attenuation of postoperative peritoneal adhesion in an experimental model. Br J Surg. 2009 Nov;96(11):1323-35.


Smad7, a protein that occupies a strategic position in fibrogenesis, inhibits the transforming growth factor (TGF) beta/Smad signalling pathway.
1(0,0,0,1) Details
17997227 Lacmann A, Hess D, Gohla G, Roussa E, Krieglstein K: Activity-dependent release of transforming growth factor-beta in a neuronal network in vitro. Neuroscience. 2007 Dec 12;150(3):647-57. Epub 2007 Sep 29.


Notably, KCl stimulation caused Smad (composite term from SMA (C. elegans) and MAD=mothers against dpp (Drosophila)) translocation into the nucleus and upregulated TGF-beta inducible early gene (Tieg1) expression, demonstrating that activity-dependent released TGF-beta may exert autocrine actions and thereby activate the TGF-beta-dependent signaling pathway.
1(0,0,0,1) Details
20061511 Pechkovsky DV, Hackett TL, An SS, Shaheen F, Murray LA, Knight DA: Human Lung Parenchyma but not Proximal Bronchi Produces Fibroblasts with Enhanced TGF{beta} Signaling and {alpha}SMA Expression. Am J Respir Cell Mol Biol. 2010 Jan 8.


In contrast to B-FBR, P-FBR displayed enhanced TGFbeta/Smad signaling at baseline, and inhibition of either ALK-5 or neutralization of endogenously produced and activated TGFbeta substantially decreased basal alphaSMA protein in P-FBR.
1(0,0,0,1) Details
19158077 Huang WY, Li ZG, Rus H, Wang X, Jose PA, Chen SY: RGC-32 mediates transforming growth factor-beta-induced epithelial-mesenchymal transition in human renal proximal tubular cells. J Biol Chem. 2009 Apr 3;284(14):9426-32. Epub 2009 Jan 21.


TGF-beta function is mediated by several signaling pathways, but RGC-32 expression in HPTCs appears to be mainly regulated by Smad.
1(0,0,0,1) Details
19578024 Parapuram SK, Chang B, Li L, Hartung RA, Chalam KV, Nair-Menon JU, Hunt DM, Hunt RC: Differential effects of TGFbeta and vitreous on the transformation of retinal pigment epithelial cells. Invest Ophthalmol Vis Sci. 2009 Dec;50(12):5965-74. Epub 2009 Jul 2.


RESULTS: Changes in phosphorylation or cellular localization of Smad -2, -3, or -4 indicated a TGFbeta-like activity in vitreous.
1(0,0,0,1) Details
18840652 Vaahtomeri K, Ventela E, Laajanen K, Katajisto P, Wipff PJ, Hinz B, Vallenius T, Tiainen M, Makela TP: Lkb1 is required for TGFbeta-mediated myofibroblast differentiation. J Cell Sci. 2008 Nov 1;121(Pt 21):3531-40. Epub 2008 Oct 7.


Ablation of Lkb1 in primary mouse embryo fibroblasts (MEFs) leads to attenuated Smad activation and TGFbeta-dependent transcription.
1(0,0,0,1) Details
17576240 Fumagalli M, Musso T, Vermi W, Scutera S, Daniele R, Alotto D, Cambieri I, Ostorero A, Gentili F, Caposio P, Zucca M, Sozzani S, Stella M, Castagnoli C: Imbalance between activin A and follistatin drives postburn hypertrophic scar formation in human skin. Exp Dermatol. 2007 Jul;16(7):600-10.


Activin A, a member of the TGF-beta family, shares the same intra-cellular Smad signalling pathway with TGF-beta, but binds to its own specific transmembrane receptors and to follistatin, a secreted protein that inhibits activin by sequestration.
1(0,0,0,1) Details
18455002 Carvajal G, Droguett A, Burgos ME, Aros C, Ardiles L, Flores C, Carpio D, Ruiz-Ortega M, Egido J, Mezzano S: Gremlin: a novel mediator of epithelial mesenchymal transition and fibrosis in chronic allograft nephropathy. Transplant Proc. 2008 Apr;40(3):734-9.


Epithelial mesenchymal transition (EMT) has been identified as responsible for the presence of activated interstitial fibroblasts (myofibroblasts) and transforming growth factor beta (TGF-beta)/Smad is the key signaling mediator.
1(0,0,0,1) Details
18355371 Nonaka M, Pawankar R, Fukumoto A, Yagi T: Heterogeneous response of nasal and lung fibroblasts to transforming growth factor-beta 1. Clin Exp Allergy. 2008 May;38(5):812-21. Epub 2008 Mar 18.


OBJECTIVE: We examined whether there is any heterogeneity between nasal and lung fibroblasts upon stimulation with TGF-beta (1) with regard to the synthesis of SMA, pro-collagen type I and vascular endothelial growth factor (VEGF) as well as translocation of Smad proteins.
1(0,0,0,1) Details
18679024 Ng YY, Chen YM, Tsai TJ, Lan XR, Yang WC, Lan HY: Pentoxifylline inhibits transforming growth factor-beta signaling and renal fibrosis in experimental crescentic glomerulonephritis in rats. Am J Nephrol. 2009;29(1):43-53. Epub 2008 Aug 5.


Further studies revealed that severe renal fibrosis was associated with upregulation of renal TGF-beta1 and activation of TGF-beta/Smad signaling, which was blocked by treatment with PTX.
1(0,0,0,1) Details
20123992 Masszi A, Speight P, Charbonney E, Lodyga M, Nakano H, Szaszi K, Kapus A: Fate-determining mechanisms in epithelial-myofibroblast transition: major inhibitory role for Smad3. J Cell Biol. 2010 Feb 8;188(3):383-99. Epub 2010 Feb 1.


Because the SMA promoter harbors both MRTF-responsive CC (A/T)-rich GG element (CArG) boxes and TGF-beta-responsive Smad-binding elements, we hypothesized that the myogenic program is mobilized by a synergy between MRTF and Smad3.
1(0,0,0,1) Details
18380662 Imura T, Tane K, Toyoda N, Fushiki S: Endothelial cell-derived bone morphogenetic proteins regulate glial differentiation of cortical progenitors. Eur J Neurosci. 2008 Apr;27(7):1596-606.

Endothelial cells produce bone morphogenetic proteins (BMPs) to activate Sma- and Mad-related protein (Smad) signalling in progenitors and the effects of endothelial cells on glial differentiation are blocked by the BMP antagonist Noggin.
82(1,1,1,2) Details
18032694 Kane N, Jones M, Brosens JJ, Saunders PT, Kelly RW, Critchley HO: Transforming growth factor-beta1 attenuates expression of both the progesterone receptor and Dickkopf in differentiated human endometrial stromal cells. Mol Endocrinol. 2008 Mar;22(3):716-28. Epub 2007 Nov 21.

Moreover, although TGFbeta1 was capable of signaling via the Sma- and mothers against decapentaplegic (MAD)-related protein (SMAD) pathway, the inhibitory effect on DKK was SMAD independent.
82(1,1,1,2) Details
18813789 Naumann U, Maass P, Gleske AK, Aulwurm S, Weller M, Eisele G: Glioma gene therapy with soluble transforming growth factor-beta receptors II and III. Int J Oncol. 2008 Oct;33(4):759-65.

Binding of TGF-beta leads to the activation of an intracellular signaling cascade and subsequent phosphorylation of Sma and MAD-related proteins (SMAD).
81(1,1,1,1) Details
17977791 Bommireddy R, Doetschman T: TGFbeta1 and Treg cells: alliance for tolerance. Trends Mol Med. 2007 Nov;13(11):492-501. Epub 2007 Oct 30.

TGFbeta1 prevents abnormal T-cell activation through the modulation of Ca2+-calcineurin signaling in a Caenorhabditis elegans Sma and Drosophila Mad proteins (SMAD) 3 and SMAD4-independent manner; however, in Treg cells, its effects are mediated, at least in part, through SMAD signaling.
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19157940 Makkar P, Metpally RP, Sangadala S, Reddy BV: Modeling and analysis of MH1 domain of Smads and their interaction with promoter DNA sequence motif. J Mol Graph Model. 2009 Apr;27(7):803-12. Epub 2008 Dec 24.

The prototypic members of the Smad family, Mad and Sma, were first described in Drosophila and Caenorhabditis elegans, respectively.
10(0,0,1,5) Details