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Basyouni WM, Abbas SY, El‐Bayouki KAM, Dawood RM, El Awady MK, Abdelhafez TH. Synthesis and antiviral screening of 2‐(propylthio)‐7‐substituted‐thiazolo[5,4‐
d
]pyrimidines as anti‐bovine viral diarrhea virus agents. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4307] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wahid M. Basyouni
- Organometallic and Organometalloid Chemistry Department National Research Centre Cairo Egypt
| | - Samir Y. Abbas
- Organometallic and Organometalloid Chemistry Department National Research Centre Cairo Egypt
| | - Khairy A. M. El‐Bayouki
- Organometallic and Organometalloid Chemistry Department National Research Centre Cairo Egypt
| | - Reham M. Dawood
- Department of Microbial Biotechnology National Research Centre Cairo Egypt
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Li ZH, Liu XQ, Geng PF, Ma JL, Zhao TQ, Wei HM, Yu B, Liu HM. Design, synthesis, and biological evaluation of new thiazolo[5,4- d]pyrimidine derivatives as potent antiproliferative agents. MEDCHEMCOMM 2017; 8:1655-1658. [PMID: 30108876 PMCID: PMC6071795 DOI: 10.1039/c7md00165g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 06/21/2017] [Indexed: 12/13/2022]
Abstract
A series of thiazolo[5,4-d]pyrimidine derivatives were synthesized and evaluated for their antiproliferative activities against several human cancer cell lines. Structure-activity relationship studies were carried out, showing that most of the target compounds had good inhibition against the tested cell lines. Among them, compound 7i exhibited potent inhibition against human gastric cancer cells MGC-803 and HGC-27 with IC50 values of 4.64 and 5.07 μM, respectively and around 12-fold selectivity between MGC-803 and GES-1, indicating a relatively low toxicity to normal cells. The potency and low toxicity of compound 7i make the thiazolo[5,4-d]pyrimidine an attractive scaffold for designing new derivatives selectively targeting MGC-803 cells.
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Affiliation(s)
- Zhong-Hua Li
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
| | - Xue-Qi Liu
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
| | - Peng-Fei Geng
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
| | - Jin-Lian Ma
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
| | - Tao-Qian Zhao
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
| | - Hao-Ming Wei
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
| | - Bin Yu
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
| | - Hong-Min Liu
- Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province , Key Laboratory of Technology of Drug Preparation (Zhengzhou University) , Ministry of Education of China , Key Laboratory of Henan Province for Drug Quality and Evaluation , School of Pharmaceutical Sciences , Zhengzhou University , Zhengzhou 450001 , PR China . ;
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Forsbach A, Samulowitz U, Völp K, Hofmann HP, Noll B, Tluk S, Schmitz C, Wader T, Müller C, Podszuweit A, Lohner A, Curdt R, Uhlmann E, Vollmer J. Dual or triple activation of TLR7, TLR8, and/or TLR9 by single-stranded oligoribonucleotides. Nucleic Acid Ther 2012; 21:423-36. [PMID: 22196370 DOI: 10.1089/nat.2011.0323] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The toll-like receptors (TLRs) 7, 8, and 9 stimulate innate immune responses upon recognizing pathogen nucleic acids. Certain GU- or AU-rich RNA sequences were described to differentiate between human TLR7- and TLR8-mediated immune effects. Those single-stranded RNA molecules require endosomal delivery for stabilization against ribonucleases. We have discovered RNA sequences that preferentially activate TLR7, form higher ordered structures, and do not require specific cellular delivery. In addition, a dual activation of TLR8 and TLR9 without affecting TLR7 can be achieved by chimeric molecules consisting of GU-rich RNA and Cytosin (C) phosphordiester or phosphorthioat (p) guanine (CpG) motif DNA sequences. Such chimeras stimulate TLR9-mediated type I interferon (IFN) and TLR8-depending proinflammatory cytokine and chemokine production upon primary human cell activation. However, an RNA-dependent TLR7 IFN-α cytokine release is suppressed by the phosphorothioate DNA sequence contained in the chimeric molecule. To convert the immune response of a single-stranded RNA from TLR7/8 to TLR9, a simple chemical modification at the 5' end proves to be sufficient. Such 8-oxo-2'-deoxy-guanosine or 8-bromo-2'-deoxy-guanosine modifications of the first guanosine in GU-rich single-stranded RNAs convert the immune response to include TLR9 activation and demonstrate strong additive effects for type I IFN immune responses in human primary cells.
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Affiliation(s)
- Alexandra Forsbach
- Pfizer Oligonucleotides Therapeutics Unit, Coley Pharmaceutical GmbH, Düsseldorf, Germany.
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Black PL, McKinnon KM, Wooden SL, Ussery MA. Antiviral activity of biological response modifiers in a murine model of AIDS. Requirement for augmentation of natural killer cell activity and synergy with oral AZT. INTERNATIONAL JOURNAL OF IMMUNOPHARMACOLOGY 1996; 18:633-50. [PMID: 9089007 DOI: 10.1016/s0192-0561(96)00064-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We employed the Rauscher murine leukemia virus (RMuLV) as a murine retrovirus model of AIDS, to test biological response modifiers (BRM) and antiviral agents for potential therapeutic activity against the human immunodeficiency virus (HIV). We examined the relationship between the augmentation of natural killer (NK) cell activity and antiviral efficacy of a series of BRM, most of which are known inducers of interferon, in this model. Poly [I,C]-LC, MVE-2, and CL 246,738, but not Ampligen, soluble glucan, or 7-thia-8-oxoguanosine, consistently produced antiviral activity. In addition, the combination of suboptimal doses of oral 3'-azido-3'-deoxythymidine (AZT) (in drinking water) and poly [I,C]-LC produced a synergistic antiviral effect. With all the BRM tested, a consistent pattern emerged, namely that antiviral activity always correlated with the augmentation of splenic NK cell activity in infected animals. For instance, poly [I,C]-LC boosted NK activity much more in infected mice treated therapeutically (treatment initiated after infection) than prophylactically (treatment initiated before infection), and it had greater antiviral activity therapeutically than prophylactically. For the BRM tested, antiviral activity did not occur without augmentation of NK activity in infected mice. In contrast, augmentation of NK activity in uninfected mice bore no relationship to antiviral activity. Furthermore, elimination of NK cells by treating mice with anti-asialo GM1 abolished the antiviral activity of poly [I,C]-LC. Although splenic NK activity was ablated by anti-asialo GM1, serum interferon levels were not affected by this treatment. These results point to a causal connection between the augmentation of NK cell activity and the antiviral efficacy of these BRM in this murine AIDS model. NK cells thus appear to play a key role in resistance to this retrovirus, as has been suggested for HIV.
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Affiliation(s)
- P L Black
- Southern Research Institute-Frederick Research Center, MD, USA
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