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Tang K, Fan H, Cui H, Zhu H, Liu Z. Studies on energy response of newly developed LiF:Mg,Cu,P TL chips with additional PbO doping. RADIATION PROTECTION DOSIMETRY 2015; 163:284-287. [PMID: 24962516 DOI: 10.1093/rpd/ncu190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
One of the most important characteristics of thermoluminescent detectors, if they are intended to be used in a wide range of energies, is their energy response. A comparison of the energy characteristics of the newly developed LiF:Mg,Cu,P chips with additional PbO doping (GR-200E) against GR-200A LiF:Mg,Cu,P was attempted to improve further the accuracy of personal dosimetry. Hp(10) energy response of GR-200E is quite different from that of GR-200A. For GR-200E, the anomalous energy response can be eliminated and the over-response to low-energy photons should be filtered properly. The GR-200E under the copper filter provided results within 4 % with respect to the conventional quantity value over the energy range from 65 to 1250 keV. The ratio of the Hp(10) response of the Cu-covered filters for GR-200A to that of those covered with plastic for GR-200E is a very good tool for identifying the radiation quality in the range studied. The accuracy in the dose evaluated from TLD measurements can be greatly increased.
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Guo L, Quan Z, Zhao Z, Tang K, Ou Y, Jiang D. Effects of musk ketone on nerve recovery after spinal cord injury. GENETICS AND MOLECULAR RESEARCH 2015; 14:2958-63. [DOI: 10.4238/2015.april.10.4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zhang Q, Zhang Q, Li Q, Liu B, Wang Y, Lin D, Zhou C, Li W, Tang K, Tian Z, Wang M, Wang J, Mi Y. Monitoring of WT1 and its target gene IRF8 expression in acute myeloid leukemia and their significance. Int J Lab Hematol 2014; 37:e67-71. [PMID: 25387409 DOI: 10.1111/ijlh.12309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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79
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Tang K, Ling M. 89 Tie-2 regulates the stemness of prostate cancer cells. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70215-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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80
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Tang K, Xia D, Li H, Guan W, Guo X, Hu Z, Ma X, Zhang X, Xu H, Ye Z. Robotic vs. open radical cystectomy in bladder cancer: A systematic review and meta-analysis. Eur J Surg Oncol 2014; 40:1399-411. [DOI: 10.1016/j.ejso.2014.03.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 03/11/2014] [Accepted: 03/13/2014] [Indexed: 10/25/2022] Open
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Zhou B, Zhou Y, Tang K. The effects of substance P on pluripotent tendon cells: an in vitro and in vivo study. JOURNAL OF MUSCULOSKELETAL & NEURONAL INTERACTIONS 2014; 14:349-358. [PMID: 25198231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Pluripotent tendon cells (PTCs) play important roles in maintaining metabolic balance and the development of tendinopathy. Recently, substance P (SP) was identified as an important factor in the pathogenesis of tendinopathy. A better understanding of SP's effects on PTCs is essential to gain more insight into tendinopathy. This study aims to investigate the effects of SP on PTCs in vitro and in vivo. For the in vitro study, we quantified exogenous SP production by PTCs and determined the effects of SP on the proliferation and differentiation of PTCs. For the in vivo study, we used a rat patella tendon injection model to investigate the biological effects of SP on PTCs and tendons. Our results showed that exogenous SP production by PTCs was 1.80 pg/10(6) cells and SP significantly enhanced the proliferation of PTCs. Reverse transcription polymerase chain reaction (RT-PCR) results showed that SP upregulated the expression of non-tenocyte genes but downregulated the expression of tenocyte-related genes in the differentiation of PTCs. Moreover, Histological examination showed that SP induced disorganizes of tissue and tendinosis-like changes in vivo. Taken together, these findings indicate that SP enhanced PTCs' proliferation, induced non-tenocyte differentiation and plays an important role in the development of tendinopathy.
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Li S, Li L, Zhu Y, Huang C, Qin Y, Liu H, Ren-Heidenreich L, Shi B, Ren H, Chu X, Kang J, Wang W, Xu J, Tang K, Yang H, Zheng Y, He J, Yu G, Liang N. Coexistence of EGFR with KRAS, or BRAF, or PIK3CA somatic mutations in lung cancer: a comprehensive mutation profiling from 5125 Chinese cohorts. Br J Cancer 2014; 110:2812-20. [PMID: 24743704 PMCID: PMC4037826 DOI: 10.1038/bjc.2014.210] [Citation(s) in RCA: 177] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 03/14/2014] [Accepted: 03/22/2014] [Indexed: 12/17/2022] Open
Abstract
Background: Determining the somatic mutations of epidermal growth factor receptor (EGFR)-pathway networks is the key to effective treatment for non-small cell lung cancer (NSCLC) with tyrosine kinase inhibitors (TKIs).The somatic mutation frequencies and their association with gender, smoking history and histology was analysed and reported in this study. Methods: Five thousand one hundred and twenty-five NSCLC patients' pathology samples were collected, and EGFR, KRAS, BRAF and PIK3CA mutations were detected by multiplex testing. The mutation status of EGFR, KRAS, BRAF and PIK3CA and their association with gender, age, smoking history and histological type were evaluated by appropriate statistical analysis. Results: EGFR, KRAS, BRAF and PIK3CA mutation rates revealed 36.2%, 8.4%, 0.5% and 3.3%, respectively, across the 5125 pathology samples. For the first time, evidence of KRAS mutations were detected in two female, non-smoking patients, age 5 and 14, with NSCLC. Furthermore, we identified 153 double and coexisting mutations and 7 triple mutations. Interestingly, the second drug-resistant mutations, T790M or E545K, were found in 44 samples from patients who had never received TKI treatments. Conclusions: EGFR exons 19, 20 and 21, and BRAF mutations tend to happen in females and non-smokers, whereas KRAS mutations were more inclined to males and smokers. Activating and resistant mutations to EGFR-TKI drugs can coexist and ‘second drug-resistant mutations', T790M or E545K, may be primary mutations in some patients. These results will help oncologists to decide candidates for mutation testing and EGFR-TKI treatment.
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Tang K, Fan H, Cui H, Zhu H, Liu Z. Further study on the influence of thermal treatments on the glow curve structure in LiF:Mg,Cu,P (GR-200A). RADIAT MEAS 2014. [DOI: 10.1016/j.radmeas.2014.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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84
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Zhou B, Zhou Y, Tang K. An overview of structure, mechanical properties, and treatment for age-related tendinopathy. J Nutr Health Aging 2014; 18:441-8. [PMID: 24676328 DOI: 10.1007/s12603-014-0026-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Tendons transfer tensile loads from muscle to bone, which enable joint motions and stabilize joints. Tendons sustain large mechanical loads in vivo and as a result, tendons were frequently injured. Aging has been confirmed as a predisposing factor of tendinopathy and bad recovery quality following tendon repair. Current treatment methods are generally not effective and involve either symptomatic relief with non-steroidal antiinflammatory drugs and physical therapy or surgery when conservative treatments failed. The limitation in treatment options is due to our incomplete knowledge of age-related tendinopathy. Studies over the past decades have uncovered a number of important mechanical and cellular changes of aging tendon. However, the basis of aging as a major risk factor for tendon injury and impaired tendon healing remained poorly understood. The objectives of this review are to provide an overview of the current knowledge about the aging-associated changes of structure, mechanical properties and treatment in tendon and highlight causes and therapies for age-related tendinopathy.
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Tang K, Cui H, Zhu H, Liu Z, Fan H. On the roles of dopants in LiF:Mg,Cu,Si thermoluminescent material. RADIATION PROTECTION DOSIMETRY 2013; 155:141-145. [PMID: 23313867 DOI: 10.1093/rpd/ncs333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The 3D thermoluminescent spectra and glow curves of LiF:Mg,Cu,Si with various Mg, Cu and Si concentrations were measured. The shapes of the glow curves in LiF:Mg,Cu,Si, LiF:Mg,Cu and LiF:Mg,Si are similar and the glow curves have peaks at approximately the same temperatures, but with significantly different intensities. Neither the temperature of the glow peak nor the wavelength of the emission maximum changes with variation of dopants concentrations when Cu is more than 0.01 mol % in LiF:Mg,Cu,Si. The spectrum structure in LiF:Mg,Cu,Si, LiF:Mg,Cu and LiF:Mg,Si is similar in the 300-550 nm range. Some weak emissions around 610 nm are shown in LiF:Mg,Cu,Si with a Cu concentration of 0.01 mol % and in LiF:Mg,Si. It is concluded that Mg dopant mainly plays a role in the formation of trapping centres, both Cu and Si play a role in the main emission process and Cu also plays a role in reducing the emission around 610 nm.
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Tang K, Murano G, Wagner H, Nogueira L, Wagner PD, Tang A, Dalton ND, Gu Y, Peterson KL, Breen EC. Impaired exercise capacity and skeletal muscle function in a mouse model of pulmonary inflammation. J Appl Physiol (1985) 2013; 114:1340-50. [PMID: 23449936 DOI: 10.1152/japplphysiol.00607.2012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Pulmonary TNFα has been linked to reduced exercise capacity in a subset of patients with moderate to severe chronic obstructive pulmonary disease (COPD). We hypothesized that prolonged, high expression of pulmonary TNFα impairs cardiac and skeletal muscle function, and both contribute to exercise limitation. Using a surfactant protein C promoter-TNFα construct, TNFα was overexpressed throughout life in mouse lungs (SP-C/TNFα+). TNFα levels in wild-type (WT) female serum and lung were two- and threefold higher than in WT male mice. In SP-C/TNFα+ mice, TNFα increased similarly in both sexes. Treadmill exercise was impaired only in male SP-C/TNFα+ mice. While increases in lung volume and airspace size induced by TNFα were comparable in both sexes, pulmonary hypertension along with lower body and muscle mass were evident only in male mice. Left ventricular (LV) function (cardiac output, stroke volume, LV maximal pressure, and LV maximal pressure dP/dt) was not altered by TNFα overexpression. Fatigue measured in isolated soleus and EDL was more rapid only in soleus of male SP-C/TNFα+ mice and accompanied by a loss of oxidative IIa fibers, citrate synthase activity, and PGC-1α mRNA and increase in atrogin-1 and MuRF1 expression also only in male mice. In situ gastrocnemius fatigue resistance, reflecting both oxygen availability and contractility, was decreased similarly in female and male SP-C/TNFα+ mice. These data indicate that male, but not female, mice overexpressing pulmonary TNFα are susceptible to exercise limitation, possibly due to muscle wasting and loss of the oxidative muscle phenotype, with protection in females possibly due to estrogen.
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Breen EC, Malloy JL, Tang K, Xia F, Fu Z, Hancock REW, Overhage J, Wagner PD, Spragg RG. Impaired pulmonary defense against Pseudomonas aeruginosa in VEGF gene inactivated mouse lung. J Cell Physiol 2013; 228:371-9. [PMID: 22718316 DOI: 10.1002/jcp.24140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Repeated bacterial and viral infections are known to contribute to worsening lung function in several respiratory diseases, including asthma, cystic fibrosis, and chronic obstructive pulmonary disease (COPD). Previous studies have reported alveolar wall cell apoptosis and parenchymal damage in adult pulmonary VEGF gene ablated mice. We hypothesized that VEGF expressed by type II cells is also necessary to provide an effective host defense against bacteria in part by maintaining surfactant homeostasis. Therefore, Pseudomonas aeruginosa (PAO1) levels were evaluated in mice following lung-targeted VEGF gene inactivation, and alterations in VEGF-dependent type II cell function were evaluated by measuring surfactant homeostasis in mouse lungs and isolated type II cells. In VEGF-deficient lungs increased PAO1 levels and pro-inflammatory cytokines, TNFα and IL-6, were detected 24 h after bacterial instillation compared to control lungs. In vivo lung-targeted VEGF gene deletion (57% decrease in total pulmonary VEGF) did not alter alveolar surfactant or tissue disaturated phosphatidylcholine (DSPC) levels. However, sphingomyelin content, choline phosphate cytidylyltransferase (CCT) mRNA, and SP-D expression were decreased. In isolated type II cells an 80% reduction of VEGF protein resulted in decreases in total phospholipids (PL), DSPC, DSPC synthesis, surfactant associated proteins (SP)-B and -D, and the lipid transporters, ABCA1 and Rab3D. TPA-induced DSPC secretion and apoptosis were elevated in VEGF-deficient type II cells. These results suggest a potential protective role for type II cell-expressed VEGF against bacterial initiated infection.
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Jung E, Delly F, Rakowski J, Mittal S, Tang K, Kim H, Jagannathan J. Repeated Stereotactic Radiosurgery for Progressive Brain Metastases From Melanoma After Initial Treatment. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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O'Donnell MJ, Tang K, Köster H, Smith CL, Cantor CR. High-density, covalent attachment of DNA to silicon wafers for analysis by maldi-tof mass spectrometry. Anal Chem 2012; 69:2438-43. [PMID: 21639380 DOI: 10.1021/ac961007v] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method is described for the covalent attachment of DNA to a solid surface at high density for hybridization detection by mass spectrometry. A silicon wafer is functionalized to place an amino group on the surface; a heterobifunctional cross-linking agent is then reacted with the primary amine to incorporate an iodoacetamido group. An oligodeoxynucleotide containing a 3'- or a 5'-disulfide is treated with a reducing agent, resulting in a terminal free thiol, which is then coupled to the iodoacetamido surface. Analysis of the surface reveals that the amount of covalently bound oligodeoxynucleotide is 250 fmol of DNA/mm(2) with ∼40% of the immobilized oligodeoxynucleotides available for hybridization. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometric (MALDI-TOF MS) analysis reveals that the covalent linkage to the support remains intact, only the annealed strand is desorbed by the laser, and the amount of DNA hybridized to the array is sufficient for detection.
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Sun Y, Zhu R, Ye H, Tang K, Zhao J, Chen Y, Liu Q, Cao Z. Towards a bioinformatics analysis of anti-Alzheimer's herbal medicines from a target network perspective. Brief Bioinform 2012; 14:327-43. [DOI: 10.1093/bib/bbs025] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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91
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Guo R, Zhang J, Li Y, Xu Y, Tang K, Li W. Prognostic significance of fragmented QRS in patients with non-ST elevation myocardial infarction: results of a 1-year, single-center follow-up. Herz 2012; 37:789-95. [PMID: 22585182 DOI: 10.1007/s00059-012-3603-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2011] [Revised: 02/12/2012] [Accepted: 02/15/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the predictive value of fragmented QRS (fQRS) among non-ST elevation acute coronary syndrome (ACS) patients. DESIGN The fQRS on standard 12-lead ECGs in 179 patients (63% males, mean age 60.9 ± 12.3 years) were analyzed. Cardiac events and cardiac mortality were regarded as two outcomes to determine whether fQRS was a clinical prognostic factor; its prognostic value was then assessed adjusting for other covariates. RESULTS Cardiac mortality (18 (17.0%) vs. 4 (5.5%)) and major cardiac event rate (46 (43.4%) vs. 22 (30.1%)) were higher in the fQRS group compared with the non-fQRS group during a mean follow-up of 12 months. A Kaplan-Meier survival analysis revealed significantly lower event-free survival for cardiac events (p = 0.030) and cardiac mortality (p = 0.020). Multivariate Cox regression analysis revealed that significant fQRS was an independent significant predictor for cardiac events and cardiac mortality. CONCLUSION These results indicate that the occurrence of fQRS in the ECG is a powerful predictor of decreased survival in NSTEMI. The prognostic importance of fQRS was incremental to clinical and conventional factors.
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Tang K, Gu Y, Dalton N, Peterson K, Wagner PD, Breen EC. Gender‐Specific Pulmonary Hypertension and Altered Skeletal Muscle Function in Lung‐Specific TNFα Overexpressing Mice. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.716.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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93
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Delavar H, Tang K, Wagner PD, Breen EC. Exercise‐Induced Angiogenesis, Fiber Size and Muscle Mass Are Reduced in Skeletal Myofiber‐Specific VEGF Gene‐ Deleted Mice. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1142.40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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94
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Bittner B, McIntyre C, Tian H, Tang K, Shah N, Phuapradit W, Ahmed H, Chokshi H, Infeld M, Fotaki N, Ma H, Portron A, Jordan P, Schmidt J. Phase I clinical study to select a novel oral formulation for ibandronate containing the excipient sodium N-[8-(2-hydroxybenzoyl) amino] caprylate (SNAC). DIE PHARMAZIE 2012; 67:233-241. [PMID: 22530305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The aim of this study was to select a novel oral formulation for ibandronate (IBN, CAS number: 13892619). In four cohorts of 28, 21, 19 and 29 healthy volunteers, the impact of the carrier molecule sodium N-[8-(2-hydroxybenzoyl) amino] caprylate (SNAC, CAS number: 203787-91-1) on the bioavailability of IBN was investigated. Within each cohort different oral formulations with one dose of ibandronate (30 mg) and three different ratios of IBN:SNAC (1:5, 1:10 and 1:20) were compared to the approved oral IBN tablet formulations (150 and 50 mg IBN) in a 4-way cross-over design and a one week washout between the administrations. The highest mean IBN exposure was achieved with a capsule formulation containing drug-coated beadlets and an IBN:SNAC ratio of 1:5. AUC(last) and C(max) of IBN were approximately 1.3- and 2.2-fold higher compared to the reference treatment (150 mg IBN without SNAC). Increasing the post-dose fasting duration from 15 to 30 min resulted in a more than 2-fold increase in AUC(last), while superimposable IBN serum concentration-time profiles were achieved after a 30 and 60 min fast. The tolerability of the IBN/SNAC treatments in all cohorts was similar to that in the IBN reference groups and most adverse events (AEs) were of mild to moderate intensity.
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Luo Y, Jiang W, Da Z, Wang B, Hu L, Zhang Y, An R, Yu H, Sun H, Tang K, Tang Z, Wang Y, Jing T, Zhu B. Subunit Vaccine Candidate AMM Down-Regulated the Regulatory T Cells and Enhanced the Protective Immunity of BCG on a Suitable Schedule. Scand J Immunol 2012; 75:293-300. [DOI: 10.1111/j.1365-3083.2011.02666.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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96
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Tang K, Cui H, Zhu H, Liu Z, Fan H. Newly developed highly sensitive LiF:Mg,Cu,Si TL discs with good stability to heat treatment. RADIAT MEAS 2012. [DOI: 10.1016/j.radmeas.2011.12.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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97
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Huang J, Wang L, Tang K, Xu R, Zhang J, Xia Y, Lu X. Growth of High Quality CdZnTe Films by Close-Spaced Sublimation Method. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.phpro.2012.03.535] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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98
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Yang W, Tang K, Zhang C, Xu D, Wen Q, Yang L. Short communication: Polymorphism of the GnRHR gene and its association with litter size in Boer goats. S AFR J ANIM SCI 2011. [DOI: 10.4314/sajas.v41i4.10] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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99
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Cheng H, Wu V, Ngan R, Tang K, Chan C, Wong K, Au S, Kwong D. A Prospective Study on Volumetric and Dosimetric Changes during Intensity Modulated Radiotherapy for Nasopharyngeal Carcinoma Patients. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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100
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Wang JH, Hou QQ, Tang K, Cheng XL, Dong LH, Liu YJ, Liu CB. Receptor-based QSAR study for a series of 3,3-disubstituted-5-aryl oxindoles and 6-aryl benzimidazol-2-ones derivatives as progesterone receptor inhibitors. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2011; 22:775-799. [PMID: 22004567 DOI: 10.1080/1062936x.2011.623324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Receptor-based comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) were performed on a series of 54 progesterone receptor (PR) inhibitors. The established CoMFA model from the training set gives statistically significant results with the cross-validated q (2) of 0.534 and non-cross-validated [Formula: see text] of 0.947. The best CoMSIA model was derived by the combination of steric field and hydrophobic field with a q (2) of 0.615 and [Formula: see text] of 0.954. A test set of 18 compounds was used to validate the predictive ability of the two models. The predicted correlation coefficients [Formula: see text] are 0.681 and 0.677 for CoMFA and CoMSIA models, respectively. Based on the CoMFA maps, the key structural characters of progesterone receptor inhibitors are identified. Moreover, the binding modes of oxindoles and benzimidazol-2-ones are also given by the quantum mechanical/molecular mechanical (QM/MM) calculations. This may provide useful information for drug design.
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