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Song J, Yang L, Su S, Piao MY, Li BL, Yu Y, Yu WY, Zhang M, Liang LX, Zuo GW, Tang ZM, Long YQ, Chen XL, Dai N, Mo JL, Wang RQ, Chen J, Hou XH. Agreement of gastroenterologists in traditional Chinese medical differential diagnosis of functional dyspepsia compared with traditional Chinese medical practitioners: A prospective, multicenter study. J Dig Dis 2020; 21:399-405. [PMID: 32378783 DOI: 10.1111/1751-2980.12873] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 04/06/2020] [Accepted: 05/04/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To compare the performance of gastroenterologists major in western medicine in diagnosing traditional Chinese medicine (TCM) syndrome types of functional dyspepsia (FD), postprandial distress (PDS) and epigastric pain syndromes (EPS) based on the main symptoms, with that of traditional TCM practitioners in outpatient services. METHODS Patients with PDS or EPS were enrolled in the study from six tertiary referral centers between January 2016 and December 2017. Their symptoms were first diagnosed by medical doctors, and then by the TCM practitioners. The diagnostic agreement between the gastroenterologists and the TCM practitioners was calculated. The patients' data and their types of FD syndrome were collected and analyzed. RESULTS In total 160 patients, including 81 with PDS and 79 with EPS were enrolled. The total diagnostic consistency rate between the gastroenterologists and TCM practitioners was 86.3%, while that of PDS and EPS was 85.2% and 87.3%, respectively. The most common type of PDS diagnosed by TCM practitioners was liver-stomach disharmony syndrome (33.3%), spleen deficiency and qi-stagnation syndrome (33.3%), while that for EPS was liver-stomach disharmony syndrome (36.7%). CONCLUSIONS Gastroenterologists had a high diagnostic agreement about the types of FD syndromes based on differential diagnosis of the main symptoms, compared with TCM practitioners. This may aid gastroenterologists in selecting Chinese medicine for FD-based on syndrome differentiation.
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Affiliation(s)
- Jun Song
- Division of Gastroenterology, Union Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Ling Yang
- Division of Gastroenterology, Union Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Shuai Su
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin, China
| | - Mei Yu Piao
- Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin, China
| | - Bao Li Li
- Department of Traditional Chinese Medicine, Tianjin Medical University General Hospital, Tianjin, China
| | - Yue Yu
- Department of Gastroenterology, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Wen Yong Yu
- Department of Gastroenterology, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Mei Zhang
- Department of Chinese-Western Medicine Integrative Oncology, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Lie Xin Liang
- Department of Digestion, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Guo Wen Zuo
- Department of Digestion, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Zhi Min Tang
- Department of Traditional Chinese Medicine, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Yan Qin Long
- Department of Gastroenterology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Xiao Li Chen
- Department of Gastroenterology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Ning Dai
- Department of Gastroenterology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Jian Ling Mo
- Department of Traditional Chinese Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Rong Quan Wang
- Department of Gastroenterology, Southwest Hospital of Third Military Medical University, Chongqing, China
| | - Jing Chen
- Department of Traditional Chinese Medicine, Southwest Hospital of Third Military Medical University, Chongqing, China
| | - Xiao Hua Hou
- Division of Gastroenterology, Union Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
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Enyedy IJ, Ling Y, Nacro K, Tomita Y, Wu X, Cao Y, Guo R, Li B, Zhu X, Huang Y, Long YQ, Roller PP, Yang D, Wang S. Discovery of small-molecule inhibitors of Bcl-2 through structure-based computer screening. J Med Chem 2001; 44:4313-24. [PMID: 11728179 DOI: 10.1021/jm010016f] [Citation(s) in RCA: 256] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Bcl-2 belongs to a growing family of proteins which regulates programmed cell death (apoptosis). Overexpression of Bcl-2 has been observed in 70% of breast cancer, 30-60% of prostate cancer, 80% of B-cell lymphomas, 90% of colorectal adenocarcinomas, and many other forms of cancer. Thereby, Bcl-2 is an attractive new anti-cancer target. Herein, we describe the discovery of novel classes of small-molecule inhibitors targeted at the BH3 binding pocket in Bcl-2. The three-dimensional (3D) structure of Bcl-2 has been modeled on the basis of a high-resolution NMR solution structure of Bcl-X(L), which shares a high sequence homology with Bcl-2. A structure-based computer screening approach has been employed to search the National Cancer Institute 3D database of 206 876 organic compounds to identify potential Bcl-2 small-molecule inhibitors that bind to the BH3 binding site of Bcl-2. These potential Bcl-2 small-molecule inhibitors were first tested in an in vitro binding assay for their potency in inhibition of the binding of a Bak BH3 peptide to Bcl-2. Thirty-five potential inhibitors were tested in this binding assay, and seven of them were found to have a binding affinity (IC(50) value) from 1.6 to 14.0 microM. The anti-proliferative activity of these seven active compounds has been tested using a human myeloid leukemia cell line, HL-60, which expresses the highest level of Bcl-2 protein among all the cancer cell lines examined. Compound 6 was the most potent compound and had an IC(50) value of 4 microM in inhibition of cell growth using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Five other compounds had moderate activity in inhibition of cell growth. Compound 6 was further evaluated for its ability to induce apoptosis in cancer cells. It was found that 6 induces apoptosis in cancer cells with high Bcl-2 expression and its potency correlates with the Bcl-2 expression level in cancer cells. Furthermore, using NMR methods, we conclusively demonstrated that 6 binds to the BH3 binding site in Bcl-X(L). Our results showed that small-molecule inhibitors of Bcl-2 such as 6 modulate the biological function of Bcl-2, and induce apoptosis in cancer cells with high Bcl-2 expression, while they have little effect on cancer cells with low or undetectable levels of Bcl-2 expression. Therefore, compound 6 can be used as a valuable pharmacological tool to elucidate the function of Bcl-2 and also serves as a novel lead compound for further design and optimization. Our results suggest that the structure-based computer screening strategy employed in the study is effective for identifying novel, structurally diverse, nonpeptide small-molecule inhibitors that target the BH3 binding site of Bcl-2.
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Affiliation(s)
- I J Enyedy
- Structural Biology and Cancer Drug Discovery Program, Lombardi Cancer Center and Department of Oncology, Georgetown University Medical Center, 3970 Reservoir Road, Washington, DC 20007, USA
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Long YQ, Lee SL, Lin CY, Enyedy IJ, Wang S, Li P, Dickson RB, Roller PP. Synthesis and evaluation of the sunflower derived trypsin inhibitor as a potent inhibitor of the type II transmembrane serine protease, matriptase. Bioorg Med Chem Lett 2001; 11:2515-9. [PMID: 11549459 DOI: 10.1016/s0960-894x(01)00493-0] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report here the synthesis of a 14-amino acid long bicyclic peptide, previously isolated from sunflower seeds. This peptide, termed sunflower trypsin inhibitor (SFTI-1), is one of the most potent naturally occurring small-molecule trypsin inhibitors. In addition to inhibiting trypsin, the synthetic SFTI-1 is also a very potent inhibitor, with a K(i) of 0.92nM, of the recently identified epithelial serine protease, termed 'matriptase'.
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Affiliation(s)
- Y Q Long
- Laboratory of Medicinal Chemistry, National Cancer Institute, NIH, FCRDC, 376/208, PO Box B, Frederick, MD 21702, USA
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Lung FD, Long YQ, Roller PP, King CR, Varady J, Wu XW, Wang S. Functional preference of the constituent amino acid residues in a phage-library-based nonphosphorylated inhibitor of the Grb2-SH2 domain. J Pept Res 2001; 57:447-54. [PMID: 11437948 DOI: 10.1034/j.1399-3011.2001.00833.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A nonphosphorylated disulfide-bridged peptide, cyclo(Cys-Glu1-Leu-Tyr-Glu-Asn-Val-Gly-Met-Tyr9-Cys)-amide (termed G1) has been identified, by phage library, that binds to the Grb2-SH2 domain but not the src SH2 domain. Synthetic G1 blocks the Grb2-SH2 domain association (IC50 of 15.5 microM) with natural phosphopeptide ligands. As a new structural motif that binds to the Grb2-SH2 domain in a pTyr-independent manner, the binding affinity of G1 is contributed by the highly favored interactions of its structural elements interacting with the binding pocket of the protein. These interactions involve side-chains of amino acids Glu1, Tyr3, Glu4, Asn5, and Met8. Also a specific conformation is required for the cyclic peptide when bound to the protein. Ala scanning within G1 and molecular modeling analysis suggest a promising model in which G1 peptide binds in the phosphotyrosine binding site of the Grb2-SH2 domain in a beta-turn-like conformation. Replacement of Tyr3 or Asn5 with Ala abrogates the inhibitory activity of the peptide, indicating that G1 requires a Y-X-N consensus sequence similar to that found in natural pTyr-containing ligands, but without Tyr phosphorylation. Significantly, the Ala mutant of Glu1, i.e. the amino acid N-terminal to Y3, remarkably reduces the binding affinity. The position of the Glu1 side-chain is confirmed to provide a complementary role for pTyr3, as demonstrated by the low micromolar inhibitory activity (IC50 = 1.02 microM) of the nonphosphorylated peptide 11, G1(Gla1), in which Glu1 was replaced by gamma-carboxy-glutamic acid (Gla).
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Affiliation(s)
- F D Lung
- Laboratory of Medicinal Chemistry, Division of Basic Sciences, National Cancer Institute, National Institutes of Health, Frederick, USA
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Randazzo PA, Andrade J, Miura K, Brown MT, Long YQ, Stauffer S, Roller P, Cooper JA. The Arf GTPase-activating protein ASAP1 regulates the actin cytoskeleton. Proc Natl Acad Sci U S A 2000; 97:4011-6. [PMID: 10725410 PMCID: PMC18133 DOI: 10.1073/pnas.070552297] [Citation(s) in RCA: 176] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Arf family GTP-binding proteins are best characterized as regulators of membrane traffic, but recent studies indicate an additional role in cytoskeletal organization. An Arf GTPase-activating protein of the centaurin beta family, ASAP1 (also known as centaurin beta4), binds Arf and two other known regulators of the actin cytoskeleton, the tyrosine kinase Src and phosphatidylinositol 4,5-bisphosphate. In this paper, we show that ASAP1 localizes to focal adhesions and cycles with focal adhesion proteins when cells are stimulated to move. Overexpression of ASAP1 altered the morphology of focal adhesions and blocked both cell spreading and formation of dorsal ruffles induced by platelet-derived growth factor (PDGF). On the other hand, ASAP1, with a mutation that disrupted GTPase-activating protein activity, had a reduced effect on cell spreading and increased the number of cells forming dorsal ruffles in response to PDGF. These data support a role for an Arf GTPase-activating protein, ASAP1, as a regulator of cytoskeletal remodeling and raise the possibility that the Arf pathway is a target for PDGF signaling.
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Affiliation(s)
- P A Randazzo
- Division of Basic Sciences, National Cancer Institute, Bethesda, MD 20892, USA.
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Long YQ, Yao ZJ, Voigt JH, Lung FD, Luo JH, Burke TR, King CR, Yang D, Roller PP. Structural requirements for Tyr in the consensus sequence Y-E-N of a novel nonphosphorylated inhibitor to the Grb2-SH2 domain. Biochem Biophys Res Commun 1999; 264:902-8. [PMID: 10544028 DOI: 10.1006/bbrc.1999.1599] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The phage library derived, nonphosphorylated and thioether-cyclized peptide, termed G1TE, cyclo(CH(2)CO-Glu(1)-Leu-Tyr(3)-Glu-Asn-Val-Gly-Met-Tyr-Cys(10))-amid e, represents a new structural motif that binds to the Grb2-SH2 domain in a pTyr-independent manner, with an IC(50) of 20 microM. The retention of binding affinity is very sensitive with respect to peptide ring-size alterations and Ala mutations. We demonstrated previously that the Glu(1) side chain and its closely related analogs partially compensate for the absence of the phosphate functionality on Tyr(3), and, based on molecular modeling, these acidic side-chains complex with the Arg67 and Arg86 side-chains of the protein in the binding cavity. In this study we judiciously altered and incorporated various natural and unnatural amino acids as Tyr replacements within the -YEN- motif, and we demonstrate the functional importance and structural requirement of Tyr(3) for effective binding of this novel non-phosphorylated ligand to the Grb2-SH2 domain. The phenyl side-chain moiety and a polar functional group with specific orientation in position Y(3) of the peptide are particularly required. Using SPR binding assays, a submicromolar inhibitor (IC(50) = 0.70 microM) was obtained when Glu(1) was replaced with alpha-aminoadipate and Tyr(3) was replaced with 4-carboxymethyl-Phe, providing peptide 14, G1TE(Adi(1), cmPhe(3)). Peptide 14 also inhibited Grb2/p185(erb)(B-2) protein association in cell homogenates of erbB-2-overexpressing MDA-MA-453 cancer cells at near one micromolar concentrations.
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Affiliation(s)
- Y Q Long
- Laboratory of Medicinal Chemistry, Division of Basic Sciences, National Cancer Institute, National Institutes of Health, Building 37, Room 5C02, Bethesda, Maryland, 20892, USA
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Long YQ, Voigt JH, Lung FD, King CR, Roller PP. Significant compensatory role of position Y-2 conferring high affinity to non-phosphorylated inhibitors of Grb2-SH2 domain. Bioorg Med Chem Lett 1999; 9:2267-72. [PMID: 10465559 DOI: 10.1016/s0960-894x(99)00379-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Systematic modification of amino acid at position Y-2 of a library-derived non-phosporylated thioether-cyclized peptide, cyclo(CH2CO-Glu2-Leu-Tyr0-Glu-Asn-Val-Gly-Met-Tyr-Cys) -amide, aided by molecular modeling, demonstrates that the Glu(-2) sidechain compensates for the absence of Tyr0 phosphorylation in retaining effective binding to Grb2-SH2 domain. Replacement of Glu(-2) with gamma-carboxyglutamic acid produced a high affinity inhibitor, the first example with submicromolar affinity (IC50 = 640 nM).
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Affiliation(s)
- Y Q Long
- Laboratory of Medicinal Chemistry, Division of Basic Sciences, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Mutoh M, Lung FD, Long YQ, Roller PP, Sikorski RS, O'Connor PM. A p21(Waf1/Cip1)carboxyl-terminal peptide exhibited cyclin-dependent kinase-inhibitory activity and cytotoxicity when introduced into human cells. Cancer Res 1999; 59:3480-8. [PMID: 10416614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
In the present study, we report the cyclin-dependent kinase (Cdk)-inhibitory activity of a series of p21waf1/cip1 (p21) peptide fragments spanning the whole protein against the cyclin D1/Cdk4 and cyclin E/Cdk2 enzymes. The most potent p21 peptide tested in our initial peptide series, designated W10, spanned amino acids 139 to 164, a region of p21 that has been found independently to bind to proliferating cell nuclear antigen and also to inhibit Cdk activity. We go on to report the importance of putative beta-strand and 3(10)-helix motifs in the W10 peptide for cyclin-dependent kinase-inhibitory activity. We also describe the cellular activity of W10 and derivatives that were chemically linked to an antennapedia peptide, the latter segment acting as a cell membrane carrier. We found that the W10AP peptide exhibited growth inhibition that resulted from necrosis in human lymphoma CA46 cells. Furthermore, regions in the W10 peptide responsible for Cdk-inhibition were also important for the degree of this cellular activity. These studies provide insights that may eventually, through further design, yield agents for the therapy of cancer.
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Affiliation(s)
- M Mutoh
- Laboratory of Molecular Pharmacology, National Cancer Institute, NIH, Bethesda, Maryland 20892-4255, USA
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He YL, Ding YF, Long YQ. Two cellulolytic Clostridium species: Clostridium cellulosi sp. nov. and Clostridium cellulofermentans sp. nov. Int J Syst Bacteriol 1991; 41:306-9. [PMID: 1854643 DOI: 10.1099/00207713-41-2-306] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Two cellulolytic clostridia, one thermophilic and the other mesophilic, were isolated and characterized. Cells of the thermophile are gram-negative rods that are motile with lophotrichous flagella and spherical terminal endospores which swell the cells. The optimum growth temperature is 55 to 60 degrees C, with a range of 40 to 65 degrees C. The deoxyribonucleic acid composition is 35 mol% G + C. The name Clostridium cellulosi sp. nov. is proposed. The type strain is AS 1.1777. Cells of the mesophile are gram negative and motile with peritrichous flagella and terminal oval or spherical spores which swell the cells. The deoxyribonucleic acid composition is 34 mol% G + C. The name Clostridium cellulofermentans sp. nov. is proposed. The type strain is AS 1.1775. Both C. cellulosi AS 1.1777 and C. cellulofermentans AS 1.1775 are deposited in the China Committee for Culture Collection of Microorganisms, Institute of Microbiology, Academia Sinica, Beijing, People's Republic of China.
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Affiliation(s)
- Y L He
- Department of Food Science and Technology, Tianjin Institute of Light Industry, Tianjin, People's Republic of China
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