YS 49

CAS NO.：132836-42-1
Empirical Formula: C20H20BrNO2
Molecular Weight: 386.2823
MDL number: MFCD20926418
SAFETY DATA SHEET (SDS)
Update Date: 2026-04-09 18:51:27

What is YS 49?

Biological Activity

YS-49 is an activator of PI3K/Akt, a downstream target of RhoA, and reduces RhoA/PTEN activation in 3-methylcholine-treated cells. YS-49 inhibits angiotensin II (Ang II)-stimulated VSMC proliferation by inducing heme oxygenase (HO-1). YS-49 is an isoquinoline compound alkaloid with strong positive inotropic effects due to its ability to activate cardiac β-adrenoceptors.

in vitro

YS-49 (1-100 μM; 18 hours; RAVSMC and RAW 264.7 cells) concentration-dependently inhibits the accumulation of nitrite in both RAVSMC and RAW 264.7 exposed to lipopolysaccharide (LPS) plus INF-γ, with IC ₅₀ values of 22 μM and 30 μM, respectively.
YS-49 (10-100 μM; 18 hours; RAVSMC and RAW 264.7 cells) suppresses iNOS gene expression induced by LPS and/or cytokines in RAVSMC and RAW 264.7 cells at the transcriptional level.

Cell Viability Assay

Cell Line:	RAVSMC and RAW 264.7 cells
Concentration:	10 μM, 30 μM and 100 μM (RAVSMC cells); 1 μM, 10 μM and 100 μM (RAW 264.7 cells)
Incubation Time:	18 hours
Result:	Inhibited the accumulation of nitrite in both RAVSMC and RAW 264.7 exposed to LPS+INF-γ, with IC ₅₀ values of 22 and 30 μM, respectively .

Western Blot Analysis

Cell Line:	RAVSMC and RAW 264.7 cells
Concentration:	10 μΜ, 30 μΜ and 100 μΜ
Incubation Time:	18 hours
Result:	Concentration -dependently inhibited the expression of iNOS protein induced by LPS plus IFN-γ.

in vivo

YS-49 (5 mg/kg; intraperitoneal injection; 8 hours; male Sprague Dawley rats) treatment significantly reduces serum NOx levels in LPS-treated rats, the NOx levels reduce from 86 μM to 34 μM. < /p>

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Animal Model:	Male Sprague Dawley rats (250-300 g)
Dosage:	5 mg/kg
Administration:	Intraperitoneal injection; 8 hours
Result:	Serum NOx levels were significantly reduced.