α-sma

SMA4, a selective activator of PKG1α, exhibits a basal EC50 of 29 μM, enhances phosphorylation of the PKG1 substrate VASP, and inhibits proliferation of hPASMCs. It is utilized in cardiovascular disease research [1].

SMA-12b is an IL-1 inhibitor.

Sinefungin (Adenosyl-Ornithine) is an effective inhibitor of virion mRNA(guanine-7-)-methyltransferase, mRNA(nucleoside-2'-)-methyltransferase, and viral multiplication. Sinefungin is a SET7/9 inhibitor and ameliorates renal fibrosis by inhibiting H3K4 methylation.

SRI-011381 hydrochloride, a new-type agonist of the TGF-beta signaling pathway, is utilized in the treatment of Alzheimer's disease.

Klotho-derived peptide 1 (KP1) (56-87), a peptide originating from the human Klotho protein, disrupts TGF-β signaling by binding to TGF-β receptor types 1 and 2 (TGFBR1 and TGFBR2; Kds = 1.41 and 14.6 µM, respectively). Preincubation with KP1 at a concentration of 10 µg/ml hinders the TGF-β-induced escalation of fibronectin and α-smooth muscle actin (α-SMA) levels in NRK-49F rat fibroblasts. Furthermore, in vivo studies reveal that KP1, administered at 1 mg/kg per day, preferentially accumulates in damaged kidneys, leading to significant reductions in serum creatinine and blood urea nitrogen levels, indicators of improved kidney function. Additionally, it decreases kidney fibrosis in mouse models of unilateral ureteral obstruction (UUO) and unilateral ischemia-reperfusion injury-induced renal fibrosis.

C18 dihydro Ceramide is a bioactive sphingolipid and precursor in the de novo synthesis of C18 ceramide that lacks the 4,5-trans double bond. [1] Increased C18 dihydroceramide lipid levels lead to increased triacylglycerol storage and autophagosome accumulation as well as upregulation of the fibrosis markers α-SMA and FGF2 in Chang and LX-2 liver cells. C18 dihydro Ceramide is elevated in the plasma of pre-diabetics up to 9 years prior to the onset of type 2 diabetes. [2] It is also elevated in the skin of patients with lesional atopic dermatitis.[3]

TGFβ-IN-2 (Compound 9d) effectively inhibits the accumulation of total collagen induced by TGF-β in NRK-49F cells, with an IC 50 value of 4.31 μM. It also suppresses the in vitro protein expression of COL1A1, α-SMA, and p-Smad3, which are induced by TGF-β. Additionally, TGFβ-IN-2 shows promise as a potential anti-fibrosis compound for in vivo applications through oral administration [1].

TGFβ1-IN-1 is an orally active TGF-β1 inhibitor that inhibits the production of TGF-β1-induced fibrotic markers (α-SMA and fibronectin) and can be used for the study of cancer and autoimmune diseases.

ATX inhibitor 11 is a potent inhibitor of ATX (autotaxin) (IC50: 2.7 nM). ATX inhibitor 11 alleviates the severity of fibrotic tissue and effectively reduces the deposition of α-SMA, a biomarker of fibrosis, in a mouse model of fibrosis. ATX inhibitor 11 can be used to study lung fibrosis.

FXR agonist 3, an anti-NASH (Non-Alcoholic Steatohepatitis) agent, functions by activating FXR. It demonstrates anti-fibrogenic activity by inhibiting the expression of COL1A1, TGF-β1, α-SMA, and TIMP1. Additionally, it significantly mitigates liver steatosis and inflammation and enhances the liver fibrosis level [1].

NTU281 is a potent inhibitor of transglutaminase-2 that reduces the elevation of serum creatinine and proteinuria in diabetic rats and decreases glomerular type I collagen accumulation, Hic-5 and α-SMA expression, as well as apoptosis, and can be used in studies of diabetes-induced glomerulosclerosis.

SRI-011381, a new-type agonist of the TGF-beta signaling pathway, is utilized in the treatment of Alzheimer's disease.

Tat-Gap 19, a peptide inhibitor of connexin43 (Cx43) hemichannels, is derived from the HIV-1 Tat protein transduction domain fused with a nine-amino acid sequence from Cx43 residues 128-136. This compound, at a concentration of 10 µM, effectively suppresses glutamate-induced ATP release in primary rat hepatocytes, indicating inhibition of Cx43 hemichannel activity. Furthermore, Tat-Gap 19 demonstrates therapeutic potential by significantly reducing infarct volume in a mouse cerebral ischemia-reperfusion injury model following middle cerebral artery occlusion (MCAO) at a dosage of 25 mg/kg. Moreover, its intraperitoneal administration at 1 mg/kg per day ameliorates fibrosis and decreases the area of hepatic stellate cells, the precursors to myofibroblasts, expressing α-smooth muscle actin (α-SMA), in a model of thioacetamide-induced liver damage. Additionally, it enhances superoxide dismutase (SOD) activity in hepatic cells from the treated mice, indicating its antioxidative benefits.

Loureirin A has an inhibitory effect on platelet activation, perhaps through an impairment of PI3K/Akt signaling.Loureirin A negatively affects agonist-induced platelet aggregation such as collagen, collagen-related peptide (CRP), ADP and thrombin. Lourei

(Rac)-Indoximod (1-Methyl-DL-tryptophan) is a potent inhibitor of indoleamine 2,3-dioxygenase (IDO). Combined treatment with IFN-γ and (Rac)-Indoximod significantly suppresses the activity of α-SMA-expressing human cardiac myofibroblasts (hCMs) and promotes apoptosis by up-regulating the genes IRF-1, Fas, and FasL. Moreover, this co-treatment effectively improves cardiac fibrosis[1].