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Hydrogen sulfie donor, GYY4137, exhibits anti-atherosclerotic activity in high fat fed apolipoprotein E knockout mice. Prof. Yong Ji, Ph.D., M.D Atherosclerosis Research Center Nanjing Medical University. Atherosclerosis. These risk factors most frequently include hypertension, - PowerPoint PPT Presentation
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Hydrogen sulfie donor, GYY4137, exhibits anti-atherosclerotic activity in high fat fed apolipoprotein E knockout mice
Prof. Yong Ji, Ph.D., M.D
Atherosclerosis Research Center
Nanjing Medical University
Ross R. N Engl J Med. 1999.
These risk factors most frequently include hypertension, tobacco smoking, diabetes mellitus, obesity, and genetic predisposition; the molecular details of how they work are not yet known.
Atherosclerosis
John W.etal. Antioxid. Redox Signal. 2009.
Endogenously produced gases
John W. et al. Antioxid. Redox Signal. 2009.
Cardiovascular actions of hydrogen Sulfide
Cardiovascular actions of hydrogen Sulfide
Elsey DJ. et al. Cell Biochem Funct 2010.
CBS
H2S
Pyridoxal-5’-phosphate
H2SH2S
John W. et al. Antioxid. Redox Signal. 2009.
3-MST CSE
L-cysteine3-mercaptopyruvate
neurons astrocytes
Biosynthesis of H2S
Role of Hydrogen Sulfide in the Development of Atherosclerotic Lesions in Apolipoprotein
E Knockout Mice
Wang Y, et al. Arterioscler Thromb Vasc Biol 2009.
H2S and Atherosclerosis
ACS14 may prevent the progression of atherosclerosis by downregulating macrophage CX3CR1 expression.
H2S and Atherosclerosis
Zhang H, et al. Eur J Pharmacol 2012.
H2S and Atherosclerosis
H2S inhibited atherogenic modification of purified LDL induced by hypochlorite
H2S induced apoptosis of human aorta smooth muscle cells.
H2S inhibit homocysteine-induced superoxide production in rat thoracic aortic smooth muscle cells.
H2S inhibit adhesion to TNF-α-activated HUVEC.
Yang G. et al. FASEB J. 2004.
Yan et al. BBRC. 2006.
Lagger et al. Free Radic Res. 2007
Pan LL, et al. Plos one 2011.
Controversial findings
H2S induces proinflammatory cytokines synthesis in human monocyte cell line.
H2S regulates leukocyte trafficking in cecal ligation and
puncture-induced sepsis.
Zhang H et al.J Leukoc Biol. 2007.
Zhi L, et al. J Leukoc Biol. 2007.
Limitations
In aqueous solution, NaHS releases large amount of H2S over a period of a few seconds.
Nevertheless, this salt gives poor satisfaction for clinical uses , because the rapid release of H2S may cause adverse effects, such as acute and excessive lowering of blood pressure.
Ideal H2S-donors for therapeutic purposes should generate H2S with slow releasing rates.
Notably, considerable emphasis has also been placed on the use of NaHS as a “tool” to model the biological effects of endogenous H2S.
Characterization of a Novel, Water-Soluble Hydrogen Sulfide Releasing Molecule
(GYY4137): New Insights Into the Biology of Hydrogen Sulfide
Li L, et al. Circulation. 2008.
GYY4137
GYY4137
NaHS GYY4137
Li L et al. Circulation. 2008.
GYY4137 and NaHS
Li L et al. Free Radic Biol Med, 2009.
0-1000umol/L
Anti-inflammation
Macrophages
LPS
GYY4137
NaHS Inflammation
Effect of hydrogen sulfide donors on LPS-induced formation of inflammatory mediators in macrophages
AS
Oxide stress Inflammation Endothelial dysfunction
Hypothesis
GYY4137 inhibited lipid accumulation and experssion of LOX-1 protein induced by Ox-LDL in RAW264.7 Cells
A
B
C
*P <0.05,***P < 0.001 vs CTL ; #P<0.05, ##P<0.01vs ox-LDL treated group. n=4
Effects of GYY4137 on H2S system in RAW264.7 Cells
A B
+P<0.05, c.f. no treatment, *P<0.05, c.f. treatment with oxLDL. n=4
?
ZYJ1122, a structural analogue of GYY4137
ZYJ1122, a structural analogue of GYY4137 , is unable to release H2S or affect lipid accumulation in RAW264.7 Cells
BC
+P<0.05, c.f. no treatment, n=4
ZYJ1122, a structural analogue of GYY4137 , is unable to release H2S or affect lipid accumulation in RAW264.7 Cells
A B
C
+P<0.05, c.f. control, n=4
ZYJ1122, a structural analogue of GYY4137 , is unable to inhibit lipid accumulation in in RAW264.7 Cells
A
B
C
+P<0.05, c.f. no treatment, *P<0.05, c.f. treatment with ox-LDL.n=4-6
GYY4137, but not ZYJ1122, inhibited lipid accumulation in human peripheral blood moncyte-derived macrophages
*P <0.05, **P<0.01 vs CTL ; #P<0.05vs GYY4137.n=6-9.
healthy donors. patient with coronary heart disease.
GYY4137 inhibited chemokine releasing in ox-LDL-treated RAW 264.7 cells
CXCL2 CXCL10 CXCR-4
+P<0.05, c.f. no treatment, *P<0.05, c.f. treatment with oxLDL.n=4-6
GYY4137 prevented ox-LDL induced macrophage iNOS expression
A B
+P<0.05, c.f. no treatment, *P<0.05, c.f. treatment with oxLDL.n=4
GYY4137 prevented oxLDL-induced macrophage NF-κB activation
A B C
D E
*P <0.05, ,**P < 0.01, ***P < 0.001 vs no treatment ; #P<0.05, ##P<0.01 ###P<0.001vs ox-LDL treated group
GYY4137 prevented oxLDL-induced macrophage ICAM-1 and VCAM-1 Experssion
+P<0.05, c.f. no treatment, *P<0.05, c.f. treatment with oxLDL.n=4
Eight-week-old
ApoE-/- mice
High-fat diet
for four weeks
Oil-red O–stained aortic root lesions of mice
Normal food for 30days
GYY4137( 50mg/kg body weight ) or NS, (i.p. )
Anesthetized and sacrificed .
Animal experiment
Effects of GYY4137 on H2S system in apoE-/- mice
‡ P<0.05, c.f. WT mice, §P<0.05, c.f. ApoE-/- + NS 。( n=5-8 )
A B
?
GYY4137 has no effect on body weight and plasma lipids
TC:total cholesterol, TG:triglyceride, HDL-C: high-density lipoprotein-cholesterol, LDL-C: low-density lipoprotein-cholesterol. *P < 0.05, **P < 0.01, ***P < 0.001 vs WT. n=5-8 animals/group.
GYY4137 decreases atherosclerotic lesion size in apoE-/- mice
A B
**P < 0.01, ***P < 0.001 vs WT, ###P < 0.01 vs apoE-/- + NS. n=5-8 animals/group.
GYY4137 improved endothelium-dependent relaxation function and activated PI3K/Akt/eNOS Pathway
A B
C D
*P < 0.05, ***P < 0.001 vs WT. #P < 0.05, ##P < 0.01,vs apoE-/- + NS. n=6 animals/group.
?
GYY4137 reduced superoxide formation and LOX-1 expression in aortas of apoE-/- mice
A a b
B
**P < 0.01 vs WT mice. #P < 0.05 vs apoE-/- + NS. n=6 animals/group.
GYY4137 reduced TNF-α, IL-6 and ICAM-1 mRNA expression in aortas of apoE-/- mice
**P < 0.01 vs WT mice. #P < 0.05 vs apoE-/- + NS. n=6 animals/group.
Summary