789-61-7 Usage
Uses
Guanosine (G837900) derivative with cancer chemotherapeutic properties. It is involved in the inhibition of human RNase H-mediated RNA cleavage from DNA-RNA duplexes via incorporation into DNA.
Biological Activity
6-thio-dg is a nucleoside analogue [1], is a telomerase-mediated telomere disrupting compound [2]. it is an anti-cancer inhibitor [1]. cancer cells were very sensitive to 6-thio-dg with observed ic50 values ranging from 0.7-2.9 μm, depending on cell types [3].telomeres are found at the end of eukaryotic linear chromosomes. they are essential for genomic stability and chromosome maintenance [3].in hct116 human colon cancer cell line, treatment with 6-thio-dg made progressive telomere shortening independent of telomerase activity inhibition and induced telomere dysfunction. grn163l is a telomerase inhibitor. in hct116 cells, treatment with grn163l and 6-thio-dg together increased telomere shortening. within 1 week, 6-thio-dg killed most of hct116 cells and altered cellular morphology. normal bj fibroblast cells are telomerase silent. after 1 week, treatment with 6-thio-dg showed no effect on cell morphology. after long-term treatment with 6-thio-dg, no effect on telomere shortening was found [1].in murine mode with xenograft derived from a549 lung cancer cell line, as compared to controls, intraperitoneal injection with 2 mg/kg of 6-thio-dg every other day completely prevented progressive tumor growth. ki67 is a biomarker correlating with proliferation levels. compared to controls, 6-thio-dg decreased ki67 staining. treatment with 6-thio-dg through local injection resulted in even more dramatic decrease in the tumor growth rate compared to untreated controls [3].
references
[1]. mender i, gryaznov s, dikmen zg, et al. abstract lb-125: a novel telomerase inhibitor. cancer research, 2013, 73(8 supplement): lb-125-lb-125.[2]. mender i, gryaznov s, shay jw. a novel telomerase substrate precursor rapidly induces telomere dysfunction in telomerase positive cancer cells but not telomerase silent normal cells. oncoscience, 2015, 2(8): 693.[3]. mender i, gryaznov s, dikmen zg, et al. induction of telomere dysfunction mediated by the telomerase substrate precursor 6-thio-2-deoxyguanosine. cancer discovery, 2015, 5(1): 82-95.
Check Digit Verification of cas no
The CAS Registry Mumber 789-61-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,8 and 9 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 789-61:
(5*7)+(4*8)+(3*9)+(2*6)+(1*1)=107
107 % 10 = 7
So 789-61-7 is a valid CAS Registry Number.
InChI:InChI=1/C10H13N5O3S/c11-10-13-8-7(9(19)14-10)12-3-15(8)6-1-4(17)5(2-16)18-6/h3-6,16-17H,1-2H2,(H3,11,13,14,19)
789-61-7Relevant articles and documents
6-O-substituted guanosine derivatives
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, (2008/06/13)
The following species of N6-activated guanosine derivatives are disclosed: 2-N-trifluoroacetamido-6-(4-nitrophenoxy)-9-(2-deoxy-beta-D-erythro-pentofuranosyl)purine 2-N-trifluoroacetamido-6-pentafluorophenoxy-9-(2-deoxy-beta-D-erythro-pentofuranosyl)purine 6-dimethylpyridinium-9-(2-deoxy-beta-D-erythropentofuranosyl)purine These guanosine compounds are useful as precursors in the synthesis of a wide variety of antiviral and anticancer nucleosides such as 2-amino-2-deoxyadenosine or 6-thio-deoxyguanosine. Also disclosed are oligonucleotides containing the above nucleosides which are precursors to modified oligonucleotides which are useful as hybridization probes.
Simple synthesis of 4-thiothymidine, 4-thiouridine and 6-thio-2′-deoxyguanosine
Xu, Yao-Zhong,Zheng, Qinguo,Swann, Peter F.
, p. 2817 - 2820 (2007/10/02)
4-triazolo-pyrimidine nucleosides and 6-O-(mesitylenesulfonyl)-2′-deoxyguanosine, when treated with thiolacetic acid at room temperature, gave the corresponding 4-thiopyrimidine nucleosides and 6-thio-2′-deoxyguanosine with high yields (86-93%). Possible mechanisms are discussed.
A convenient synthesis of 2'-deoxy-6-thioguanosine, ara-guanine, ara-6-thioguanine and certain related purine nucleosides by the stereospecific sodium salt glycosylation procedure [1]
Hanna,Ramasamy,Robins,Revankar
, p. 1899 - 1903 (2007/10/02)
A simple and high-yield synthesis of biologically significant 2'-deoxy-6-thioguanosine, ara-6-thioguanine and araG has been accomplished employing the stereospecific sodium salt glycosylation method. Glycosylation of the sodium salt of 6-chloro- and 2-amino-6-chloropurine (1 and 2, respectively) with 1-chloro-2-deoxy-3,5-di-O-(p-toluoyl)-α-D-erythro-pentofuranose gave the corresponding N-9 substituted nucleosides as major products with the β-anomeric configuration (4 and 5, respectively) along with a minor amount of the N-7 positional isomers (6 and 7). Treatment of 4 with hydrogen sulfide in methanol containing sodium methoxide gave 2'-deoxy-6-thioinosine in 93% yield. Similarly, 5 was transformed into 2'-deoxy-6-thioguanosine (β-TGdR, 11) in 71% yield. Reaction of the sodium salt of 2 with 1-chloro-2,3,5-tri-O-benzyl-α-D-arabinofuranose gave N-7 and N-9 glycosylated products 13 and 9, respectively. Debenzylation of 9 with boron trichloride at -78° gave the versatile intermediate 2-amino-6-chloro-9-β-D-arabinofuranosylpurine 62% yield. Direct treatment of 14 with sodium hydrosulfide furnished ara-6-thioguanine. Alkaline hydrolysis of 14 readily gave 9-β-D-arabinofuranosylguanine (araG, 17), which on subsequent phosphorylation with phosphorus oxychloride in trimethyl phosphate afforded araG 5'-monophosphate.
