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Yang Y, Xie Z, Hu H, Yang G, Zhu X, Yang D, Niu Z, Mao G, Shao M, Wang J. Using CT imaging features to predict visceral pleural invasion of non-small-cell lung cancer. Clin Radiol 2023; 78:e909-e917. [PMID: 37666721 DOI: 10.1016/j.crad.2023.08.007] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 08/07/2023] [Accepted: 08/09/2023] [Indexed: 09/06/2023]
Abstract
AIM To examine the diagnostic performance of different models based on computed tomography (CT) imaging features in differentiating the invasiveness of non-small-cell lung cancer (NSCLC) with multiple pleural contact types. MATERIALS AND METHODS A total of 1,573 patients with NSCLC (tumour size ≤3 cm) were included retrospectively. The clinical and pathological data and preoperative imaging features of these patients were investigated and their relationships with visceral pleural invasion (VPI) were compared statistically. Multivariate logistic regression was used to eliminate confounding factors and establish different predictive models. RESULTS By univariate analysis and multivariable adjustment, surgical history, tumour marker (TM), number of pleural tags, length of solid contact and obstructive inflammation were identified as independent risk predictors of pleural invasiveness (p=0.014, 0.003, <0.001, <0.001, and 0.017, respectively). In the training group, comparison of the diagnostic efficacy between the combined model including these five independent predictors and the image feature model involving the latter three imaging predictors were as follows: sensitivity of 88.9% versus 77% and specificity of 73.5% versus 84.1%, with AUC of 0.868 (95% CI: 0.848-0.886) versus 0.862 (95% CI: 0.842-0.880; p=0.377). In the validation group, the sensitivity and specificity of these two models were as follow: the combined model, 93.5% and 74.3%, the imaging feature model, 77.4% and 81.3%, and their areas under the curve (AUCs) were both 0.884 (95% CI: 0.842-0.919). The best cut-off value of length of solid contact was 7.5 mm (sensitivity 68.9%, specificity 75.5%). CONCLUSIONS The image feature model showed great potential in predicting pleural invasiveness, and had comparable diagnostic efficacy compared with the combined model containing clinical data.
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Affiliation(s)
- Y Yang
- Department of Radiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, China; Department of Radiology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - Z Xie
- Department of Radiology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, China
| | - H Hu
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - G Yang
- Department of Radiology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - X Zhu
- Department of Radiology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - D Yang
- Department of Radiology, Taizhou Municipal Hospital, Taizhou, China
| | - Z Niu
- Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - G Mao
- Department of Radiology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - M Shao
- Department of Radiology, Tongde Hospital of Zhejiang Province, Hangzhou, China
| | - J Wang
- Department of Radiology, Tongde Hospital of Zhejiang Province, Hangzhou, China.
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Janic B, Brown S, Neff R, Mao G, Chetty I, Movsas B, Wen N. Gold Nanoparticle (AuNP) as a Therapeutic Enhancer for Radio – And Immunotherapy Therapy Combination in Triple Negative Breast Cancer. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.2114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Cai T, Mao G, Zheng R, Fang M, Yang X, Wang L, Qi C. Testicular injury during SARS-CoV-2 infection may be neglected: An assessment from scRNA-seq profiling and protein detection of angiotensin-converting enzyme II. Exp Ther Med 2021; 22:1485. [PMID: 34765026 PMCID: PMC8576622 DOI: 10.3892/etm.2021.10920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 12/18/2020] [Indexed: 01/08/2023] Open
Abstract
Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), is outbreaking globally. SARS-CoV-2 invades host cells via angiotensin-converting enzyme II (ACE2) and causes multiple-organ injury. Autopsy studies indicated that the testis of patients with COVID-19 exhibited various degrees of spermatogenic cell reduction and injury, but the composition of ACE2-expressing cells and their proportion in the testes have remained to be determined. Recent clinical evidence suggested that the ratio of male sex hormones in males with COVID-19 was significantly changed. The present study aimed to explore whether SARS-CoV-2 is able to damage the male reproductive system. For this, the ACE2-expressing cell composition and proportion in male testes were analyzed using single-cell RNA sequencing (RNA-seq) datasets downloaded from the Gene Expression Omnibus (GEO) database and immunohistochemical (IHC) staining. The single-cell RNA-seq data indicated that ACE2 mRNA was highly expressed in myoid cells, Leydig cells and spermatogenic cells, accounting for 5.45, 1.24 and 0.423% of adult testicular cells. ACE2 mRNA-expressing Sertoli cells, spermatogenic cells and myoid cells accounted for 5.00, 0.56 and 0.73% of infant testicular cells. IHC demonstrated that ACE2 protein was also highly expressed in testicular tissues. In conclusion, the present results demonstrated that testicular injury may be missed by clinicians in patients with COVID-19 and male reproductive function should be closely followed up.
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Affiliation(s)
- Tonghui Cai
- Department of Pathology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Guanquan Mao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
| | - Rui Zheng
- Department of Otolaryngology-Head and Neck Surgery, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Mao Fang
- Department of Pathology, School of Basic Medical Science, Guangzhou Medical University, Guangzhou, Guangdong 511436, P.R. China
| | - Xiaorong Yang
- Clinical Laboratory, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, Guangdong 510000, P.R. China
| | - Lijing Wang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
| | - Cuiling Qi
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
- Guangdong Province Key Laboratory for Biotechnology Drug Candidates, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, P.R. China
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Mao G, Zheng S, Li J, Liu X, Zhou Q, Cao J, Zhang Q, Zheng L, Wang L, Qi C. Glipizide Combined with ANP Suppresses Breast Cancer Growth and Metastasis by Inhibiting Angiogenesis through VEGF/VEGFR2 Signaling. Anticancer Agents Med Chem 2021; 22:1735-1741. [PMID: 34515012 DOI: 10.2174/1871520621666210910085733] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 07/17/2021] [Accepted: 07/26/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Breast cancer is one of the most common cancers worldwide among women, and angiogenesis has an important effect on its growth and metastasis. Glipizide, which is a widely used drug for type 2 diabetes mellitus, has been reported to inhibit tumor growth and metastasis by upregulating the expression of natriuretic peptide receptor A (NPRA). Atrial natriuretic peptide (ANP), the receptor of NPRA, plays an important role in angiogenesis. The purpose of this study was to explore the effect of glipizide combined with ANP on breast cancer growth and metastasis. METHODS To investigate the effect of glipizide combined with ANP on breast cancer, glipizide, ANP or glipizide combined with ANP was intraperitoneally injected into MMTV-PyMT mice. To explore whether the anticancer efficacy of glipizide combined with ANP was correlated with angiogenesis, a tube formation assay was performed. RESULTS Glipizide combined with ANP was found to inhibit breast cancer growth and metastasis in MMTV-PyMT mice, which spontaneously develop breast cancer. Furthermore, the inhibitory effect of ANP combined with glipizide was better than that of glipizide alone. ANP combined with glipizide significantly inhibited tube formation of human umbilical vein endothelial cells (HUVECs) by suppressing vascular endothelial growth factor (VEGF)/VEGFR2 (vascular endothelial growth factor receptor 2) signaling. CONCLUSIONS These results demonstrate that glipizide combined with ANP has a greater potential than glipizide alone to be repurposed as effective agents for the treatment of breast cancer by targeting tumor-induced angiogenesis.
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Affiliation(s)
- Guanquan Mao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Shuting Zheng
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Jinlian Li
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Xiaohua Liu
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Qin Zhou
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Jinghua Cao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Qianqian Zhang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Lingyun Zheng
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Lijing Wang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
| | - Cuiling Qi
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006. China
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Moodliar R, Aksenova V, Frias MVG, van de Logt J, Rossenu S, Birmingham E, Zhuo S, Mao G, Lounis N, Kambili C, Bakare N. Bedaquiline for multidrug-resistant TB in paediatric patients. Int J Tuberc Lung Dis 2021; 25:716-724. [PMID: 34802493 PMCID: PMC8412106 DOI: 10.5588/ijtld.21.0022] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND: TMC207-C211 (NCT02354014) is a Phase 2, open-label, multicentre, single-arm study to evaluate pharmacokinetics, safety/tolerability, antimycobacterial activity and dose selection of bedaquiline (BDQ) in children (birth to <18 years) with multidrug-resistant-TB (MDR-TB). METHODS: Patients received 24 weeks’ BDQ with an anti-MDR-TB background regimen (BR), followed by 96 weeks of safety follow-up. Results of the primary analysis are presented based on data up to 24 weeks for Cohort 1 (≥12–<18 years; approved adult tablet at the adult dosage) and Cohort 2 (≥5–<12 years; age-appropriate 20 mg tablet at half the adult dosage). RESULTS: Both cohorts had 15 patients, of whom respectively 53% and 40% of Cohort 1 and Cohort 2 children had confirmed/probable pulmonary MDR-TB. Most patients completed 24 weeks’ BDQ/BR treatment (Cohort 1: 93%; Cohort 2: 67%). Geometric mean BDQ area under the curve 168h values of 119,000 ng.h/mL (Cohort 1) and 118,000 ng.h/mL (Cohort 2) at Week 12 were within 60–140% (86,200–201,000 ng.h/mL) of adult target values. Few adverse event (AE) related discontinuations or serious AEs, andnoQTcF >460 ms during BDQ/BR treatment or deaths occurred. Of MGIT-evaluable patients, 6/8 (75%) Cohort 1 and 3/3 (100%) Cohort 2 culture converted. CONCLUSION: In children and adolescents aged ≥5–<18 years with MDR-TB, including pre-extensively drug-resistant-TB (pre-XDR-TB) or XDR-TB, 24 weeks of BDQ provided a comparable pharmacokinetic and safety profile to adults.
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Affiliation(s)
- R Moodliar
- Tuberculosis and HIV Investigative Network, King Dinuzulu Hospital, Sydenham, Durban, South Africa
| | - V Aksenova
- National Medical Research Center for Phthisiopulmonology and Infectious Diseases, Moscow, Russian Federation
| | - M V G Frias
- De La Salle Health Sciences Institute, Dasmariñas City, Cavite, the Philippines
| | - J van de Logt
- Janssen Research & Development, Leiden, The Netherlands
| | - S Rossenu
- Janssen Pharmaceutica, Beerse, Belgium
| | | | - S Zhuo
- Janssen Research & Development, Titusville, NJ, IQVIA, NC
| | - G Mao
- Janssen Research & Development, Titusville, NJ
| | - N Lounis
- Janssen Pharmaceutica, Beerse, Belgium
| | - C Kambili
- Johnson & Johnson Global Public Health, New Brunswick, NJ, USA
| | - N Bakare
- Janssen Research & Development, Titusville, NJ
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6
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Janic B, Neff R, Brown S, Liu F, Mao G, Chetty I, Movsas B, Wen N. Radiation and Gold Nanoparticle Immunomodulation in MDA MB 231 Mouse Breast Cancer Model. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Duncan AE, Jia Y, Soltesz E, Leung S, Yilmaz H, Mao G, Timur AA, Kottke‐Marchant K, Rogers HJ, Ma C, Ince I, Karimi N, Yagar S, Trombetta C, Sessler DI. Effect of 6% hydroxyethyl starch 130/0.4 on kidney and haemostatic function in cardiac surgical patients: a randomised controlled trial. Anaesthesia 2020; 75:1180-1190. [PMID: 32072617 PMCID: PMC9291605 DOI: 10.1111/anae.14994] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/30/2019] [Indexed: 01/27/2023]
Abstract
Whether third‐generation hydroxyethyl starch solutions provoke kidney injury or haemostatic abnormalities in patients having cardiac surgery remains unclear. We tested the hypotheses that intra‐operative administration of a third‐generation starch does not worsen postoperative kidney function or haemostasis in cardiac surgical patients compared with human albumin 5%. This triple‐blind, non‐inferiority, clinical trial randomly allocated patients aged 40–85 who underwent elective aortic valve replacement, with or without coronary artery bypass grafting, to plasma volume replacement with 6% starch 130/0.4 vs. 5% human albumin. Our primary outcome was postoperative urinary neutrophil gelatinase‐associated lipocalin concentrations, a sensitive and early marker of postoperative kidney injury. Secondarily, we evaluated urinary interleukin‐18; acute kidney injury using creatinine RIFLE criteria, coagulation measures, platelet count and function. Non‐inferiority (delta 15%) was assessed with correction for multiple comparisons. We enrolled 141 patients (69 starch, 72 albumin) as planned. Results of the primary analysis demonstrated that postoperative urine neutrophil gelatinase‐associated lipocalin (median (IQR [range])) was slightly lower with hydroxyethyl starch (5 (1–68 [0–996]) ng.ml−1) vs. albumin (5 (2–74 [0–1604]) ng.ml−1), although not non‐inferior [ratio of geometric means (95%CI) 0.91 (0.57, 1.44); p = 0.15] due to higher than expected variability. Urine interleukin‐18 concentrations were reduced, but interleukin‐18 and kidney injury were again not non‐inferior. Of 11 individual coagulation measures, platelet count and function, nine were non‐inferior to albumin. Two remaining measures, thromboelastographic R value and arachidonic acid‐induced platelet aggregation, were clinically similar but with wide confidence intervals. Starch administration during cardiac surgery produced similar observed effects on postoperative kidney function, coagulation, platelet count and platelet function compared with albumin, though greater than expected variability and wide confidence intervals precluded the conclusion of non‐inferiority. Long‐term mortality and kidney function appeared similar between starch and albumin.
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Affiliation(s)
- A. E. Duncan
- Departments of Cardiothoracic Anesthesiology and Outcomes Research Cleveland Clinic Cleveland OH USA
| | - Y. Jia
- Department of Outcomes Research Cleveland Clinic Cleveland OH USA
| | - E. Soltesz
- Department of Thoracic and Cardiovascular Surgery Cleveland Clinic Cleveland OH USA
| | - S. Leung
- Department of Outcomes Research Cleveland Clinic Cleveland OH USA
| | - H.O. Yilmaz
- Department of Outcomes Research Cleveland Clinic Cleveland OH USA
| | - G. Mao
- Departments of Quantitative Health Sciences and Outcomes Research Cleveland Clinic Cleveland OH USA
| | - A. A. Timur
- Department of Laboratory Medicine Cleveland Clinic Cleveland OH USA
| | - K. Kottke‐Marchant
- Department of Pathology and Laboratory Administration Cleveland Clinic Cleveland OH USA
| | - H. J. Rogers
- Department of Laboratory Medicine Cleveland Clinic Cleveland OH USA
| | - C. Ma
- Departments of Quantitative Health Sciences and Outcomes Research Cleveland Clinic Cleveland OH USA
| | - I. Ince
- Department of Outcomes Research Cleveland Clinic Cleveland OH USA
| | - N. Karimi
- Department of Outcomes Research Cleveland Clinic Cleveland OH USA
| | - S. Yagar
- Department of Outcomes Research Cleveland Clinic Cleveland OH USA
| | - C. Trombetta
- Department of Cardiothoracic Anesthesiology Cleveland Clinic Cleveland OH USA
| | - D. I. Sessler
- Department of Outcomes Research Cleveland Clinic Cleveland OH USA
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Cao J, Liu X, Yang Y, Wei B, Li Q, Mao G, He Y, Li Y, Zheng L, Zhang Q, Li J, Wang L, Qi C. Decylubiquinone suppresses breast cancer growth and metastasis by inhibiting angiogenesis via the ROS/p53/ BAI1 signaling pathway. Angiogenesis 2020; 23:325-338. [PMID: 32020421 DOI: 10.1007/s10456-020-09707-z] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 01/22/2020] [Indexed: 02/05/2023]
Abstract
Breast cancer is one of the most common cancers worldwide with a rising incidence, and is the leading cause of cancer-related death among females. Angiogenesis plays an important role in breast cancer growth and metastasis. In this study, we identify decylubiquinone (DUb), a coenzyme Q10 analog, as a promising anti-breast cancer agent through suppressing tumor-induced angiogenesis. We screened a library comprising FDA-approved drugs and found that DUb significantly inhibits blood vessel formation using in vivo chick embryo chorioallantoic membrane (CAM) and yolk sac membrane (YSM) models. DUb was further identified to inhibit angiogenesis in the rat aortic ring and Matrigel plug assay. Moreover, DUb was found to suppress breast cancer growth and metastasis in the MMTV-PyMT transgenic mouse and human xenograft tumor models. To explore whether the anticancer efficacy of DUb was directly corrected with tumor-induced angiogenesis, the MDA-MB-231 breast cancer assay on the CAM was performed. Interestingly, DUb significantly inhibits the angiogenesis of breast cancer on the CAM. Brain angiogenesis inhibitor 1 (BAI1), a member of the G protein-coupled receptor (GPCR) adhesion subfamily, has an important effect on the inhibition of angiogenesis. Further studies demonstrate that DUb suppresses the formation of tubular structures by regulating the reactive oxygen species (ROS)/p53/BAI1 signaling pathway. These results uncover a novel finding that DUb has the potential to be an effective agent for the treatment of breast cancer by inhibiting tumor-induced angiogenesis.
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Affiliation(s)
- Jinghua Cao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Xiaohua Liu
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Yang Yang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Bo Wei
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510630, Guangdong, China
| | - Qianming Li
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Guanquan Mao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Yajun He
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Yuanyuan Li
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Lingyun Zheng
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Qianqian Zhang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Jiangchao Li
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China
| | - Lijing Wang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China.
| | - Cuiling Qi
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China.
- Guangdong Province Key Laboratory for Biotechnology Drug Candidates, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong, China.
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Li Q, Cao J, He Y, Liu X, Mao G, Wei B, Liao S, Zhang Q, Li J, Zheng L, Wang L, Qi C. R5, a neutralizing antibody to Robo1, suppresses breast cancer growth and metastasis by inhibiting angiogenesis via down-regulating filamin A. Exp Cell Res 2020; 387:111756. [PMID: 31811830 DOI: 10.1016/j.yexcr.2019.111756] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 11/30/2019] [Accepted: 12/03/2019] [Indexed: 12/13/2022]
Abstract
Breast cancer (BC) is one of the most common cancers among women in both developed and developing countries with a rising incidence. Using the MMTV-PyMT transgenic mouse model and xenografted breast cancer model, we found that R5, a neutralizing antibody to Robo1, significantly inhibited BC growth and metastasis. Angiogenesis is involved in the growth and metastasis of BC. Interestingly, R5 significantly decreases microvessel density in BC tissues, and inhibits blood vessel formation and development in in vivo chick embryo chorioallantoic membrane (CAM), yolk sac membrane (YSM) and Matrigel plug models. To investigate whether its anti-breast cancer efficacy is ascribed to its direct antiangiogenic properties, xenografted breast cancer model on CAM was established. Furthermore, R5 significantly reduces the tube formation of the vascular plexus on xenografted breast tumor on CAM. R5 also suppresses the migration and the tubular structure formation of human umbilical vein endothelial cells (HUVECs) by down-regulating the expression of filamin A (FLNA). These findings show that R5 has the potential to be a promising agent for the treatment of BC by suppressing the tumor-induced angiogenesis.
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Affiliation(s)
- Qianming Li
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Jinghua Cao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Yajun He
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Xiaohua Liu
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Guanquan Mao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Bo Wei
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510630, China
| | - Shiyan Liao
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Qianqian Zhang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Jiangchao Li
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Lingyun Zheng
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China
| | - Lijing Wang
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
| | - Cuiling Qi
- Institute of Basic Medical Sciences, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China; Guangdong Province Key Laboratory for Biotechnology Drug Candidates, School of Life Sciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, 510006, China.
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Janic B, Brown S, Liu F, Mao G, Chetty I, Movsas B, Wen N. Gold Nanoparticles as Radiosensitizers in MDA MB 231 Xenograft Mouse Model. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Feng J, Shen B, Jiang H, Wang L, Qian J, Shu Y, Chen P, Mao G, Liu B, Zhang X, Liu C, Wu J, Li X, Cai W, Shen W, Wang Q, He J, Hua D, Zhang Z, Zhang Y. Identification of patients who benefit from apatinib in advanced gastric cancer: Data derived from a real-world study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy282.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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12
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Maheshwari K, Turan A, Mao G, Yang D, Niazi AK, Agarwal D, Sessler DI, Kurz A. The association of hypotension during non-cardiac surgery, before and after skin incision, with postoperative acute kidney injury: a retrospective cohort analysis. Anaesthesia 2018; 73:1223-1228. [PMID: 30144029 DOI: 10.1111/anae.14416] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/01/2018] [Indexed: 12/15/2022]
Abstract
Intra-operative hypotension is associated with acute postoperative kidney injury. It is unclear how much hypotension occurs before skin incision compared with after, or whether hypotension in these two periods is similarly associated with postoperative kidney injury. We analysed the association of mean arterial pressure < 65 mmHg with postoperative kidney injury in 42,825 patients who were anaesthetised for elective non-cardiac surgery. Intra-operative hypotension occurred in 30,423 (71%) patients: 22,569 (53%) patients before skin incision; and 24,102 (56%) patients after incision. Anaesthetised patients who were hypotensive had mean arterial pressures < 65 mmHg for a median (IQR [range]) of 5.5 (0.0-14.7 [0.0-60.0]) min.h-1 before skin incision, compared with 1.7 [0.3-5.1 [0.0-57.5]) min.h-1 after incision: a median (IQR [range]) of 36% (0%-84% [0%-100%]) of hypotensive readings were before incision. We diagnosed postoperative kidney injury in 2328 (5%) patients. The odds ratio (95%CI) for acute kidney injury was 1.05 (1.02-1.07) for each doubling of the duration of hypotension, p < 0.001. Postoperative kidney injury was associated with the product of hypotension duration and severity, that is, area under the curve, before skin incision and after, odds ratio (95%CI): 1.02 (1.01-1.04), p = 0.004; and 1.02 (1.00-1.04), p = 0.016, respectively. A substantial fraction of all hypotension happened before surgical incision and was thus completely due to anaesthetic management. We recommend that anaesthetists should avoid mean arterial pressure < 65 mmHg during surgery, especially after induction, assuming that its association with postoperative kidney injury is, at least in part, causal.
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Affiliation(s)
- K Maheshwari
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
| | - A Turan
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
| | - G Mao
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
| | - D Yang
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
| | - A K Niazi
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
| | - D Agarwal
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
| | - D I Sessler
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
| | - A Kurz
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, OH, USA
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Chen Z, Zhang L, Qu J, Wu Y, Mao G, Zhu X, Zhu J. Clinical analysis of combined revascularization in treating ischemic Moyamoya disease in adults. Neurochirurgie 2018; 64:49-52. [PMID: 29455906 DOI: 10.1016/j.neuchi.2017.08.005] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 05/23/2017] [Accepted: 08/19/2017] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the clinical efficacy of superficial temporal artery-middle cerebral artery anastomosis (STA-MCA)+encephalo-duro-myo-synangiosis (EDMS) in treating ischemic Moyamoya disease (IMD) in adults. METHODS A total of 30 adult patients with IMD were selected to be included in the study; they underwent STA-MCA+EDMS and were followed up for 3 months to 2 years. The digital subtraction angiography findings, modified Rankin scale (mRs) score, and complications of all the patients were compared. RESULTS Thirty patients successfully completed the surgery. Three patients had postoperative complications (two patients with cerebral infarction on the surgical side and one patient with poor scalp healing). The postoperative morbidity rate was 10%. Angiography conducted at 3 to 6 months postoperatively showed 28 cases of anastomotic patency; the anastomotic patency rate was 93.3%. The mRs scores of the patients' neurological function 3 months after surgery were lower than those before surgery. CONCLUSION STA-MCA+EDMS is effective in treating Moyamoya disease.
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Affiliation(s)
- Z Chen
- Department of neurosurgery, the second affiliated hospital of Nanchang university, Nanchang 330006, People's Republic of China
| | - L Zhang
- Department of neurosurgery, the second affiliated hospital of Nanchang university, Nanchang 330006, People's Republic of China
| | - J Qu
- Department of neurosurgery, the second affiliated hospital of Nanchang university, Nanchang 330006, People's Republic of China
| | - Y Wu
- Department of neurosurgery, the second affiliated hospital of Nanchang university, Nanchang 330006, People's Republic of China
| | - G Mao
- Department of neurosurgery, the second affiliated hospital of Nanchang university, Nanchang 330006, People's Republic of China
| | - X Zhu
- Department of neurosurgery, the second affiliated hospital of Nanchang university, Nanchang 330006, People's Republic of China
| | - J Zhu
- Department of neurosurgery, the second affiliated hospital of Nanchang university, Nanchang 330006, People's Republic of China.
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Shi YK, Zhang L, Zhang S, Shi M, Qin S, Wu C, Zhuang Z, Mao G, Hua D, Zhou X, Qu Y, Wang Y, Shi X, Hu C, Li W, Ouyang M, Chen L, Sun Y, Wu G, Sun Y. Humanized recombinant endostatin combined with vinorelbine plus cisplatin followed by maintenance therapy with humanized recombinant endostatin in advanced non-small cell lung cancer: A multicentre, double-blind, randomised phase 3 trial. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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15
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Mao G, Zhang Z, Huang Z, Chen W, Huang G, Meng F, Zhang Z, Kang Y. MicroRNA-92a-3p regulates the expression of cartilage-specific genes by directly targeting histone deacetylase 2 in chondrogenesis and degradation. Osteoarthritis Cartilage 2017; 25:521-532. [PMID: 27884646 DOI: 10.1016/j.joca.2016.11.006] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/08/2016] [Accepted: 11/12/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Increased activity of histone deacetylase 2 (HDAC2) has been found in patients with osteoarthritis (OA) and cartilage matrix degradation and has been shown to mediate the repression of cartilage-specific gene expression in human chondrocytes. We aimed to determine whether microRNA-92a-3p (miR-92a-3p) regulates cartilage-specific gene expression via targeted HDAC2 in chondrogenesis and degradation. METHODS miR-92a-3p expression was assessed in vitro in a human mesenchymal stem cells (hMSCs) model of chondrogenesis and in normal and OA primary human chondrocytes (PHCs), and in normal and OA human cartilage by in situ hybridization. hMSCs and PHCs were transfected with miR-92a-3p or its antisense inhibitor (anti-miR-92a-3p), respectively. PHCs were transfected with miR-92a-3p or anti-miR-92a-3p for 24 h before chromatin immunoprecipitation (ChIP) assay was performed with anti-ac-H3 antibody. Direct interaction between miR-92a-3p and its putative binding site in the 3'-untranslated region (3'-UTR) of HDAC2 mRNA was confirmed by luciferase reporter assay. RESULTS miR-92a-3p expression was elevated in chondrogenic and hypertrophic hMSC, while reduced in OA cartilage compared with normal cartilage. The overexpression of miR-92a-3p suppressed the activity of a reporter construct containing the 3'-UTR and inhibited HDAC2 expression in both hMSCs and PHCs, while treatment with anti-miR-92a-3p enhanced HDAC2 expression. ChIP assays showed that miR-92a-3p enhances H3 acetylation on aggrecan (ACAN), cartilage oligomeric protein (COMP) and Col2a1 promoter, and also promotes relative cartilage matrix expression. CONCLUSION Our results suggest that miR-92a-3p regulates cartilage development and homeostasis, which directly targets HDAC2, indicating histone hyperacetylation plays an important role in increased expression of cartilage matrix.
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Affiliation(s)
- G Mao
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Z Zhang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Z Huang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - W Chen
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - G Huang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - F Meng
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Z Zhang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China.
| | - Y Kang
- Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China.
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Kagan VE, Jiang J, Huang Z, Tyurina YY, Desbourdes C, Cottet-Rousselle C, Dar HH, Verma M, Tyurin VA, Kapralov AA, Cheikhi A, Mao G, Stolz D, St. Croix CM, Watkins S, Shen Z, Li Y, Greenberg ML, Tokarska-Schlattner M, Boissan M, Lacombe ML, Epand RM, Chu CT, Mallampalli RK, Bayır H, Schlattner U. NDPK-D (NM23-H4)-mediated externalization of cardiolipin enables elimination of depolarized mitochondria by mitophagy. Cell Death Differ 2016; 23:1140-51. [PMID: 26742431 PMCID: PMC4946882 DOI: 10.1038/cdd.2015.160] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 10/11/2015] [Accepted: 11/19/2015] [Indexed: 01/16/2023] Open
Abstract
Mitophagy is critical for cell homeostasis. Externalization of the inner mitochondrial membrane phospholipid, cardiolipin (CL), to the surface of the outer mitochondrial membrane (OMM) was identified as a mitophageal signal recognized by the microtubule-associated protein 1 light chain 3. However, the CL-translocating machinery remains unknown. Here we demonstrate that a hexameric intermembrane space protein, NDPK-D (or NM23-H4), binds CL and facilitates its redistribution to the OMM. We found that mitophagy induced by a protonophoric uncoupler, carbonyl cyanide m-chlorophenylhydrazone (CCCP), caused externalization of CL to the surface of mitochondria in murine lung epithelial MLE-12 cells and human cervical adenocarcinoma HeLa cells. RNAi knockdown of endogenous NDPK-D decreased CCCP-induced CL externalization and mitochondrial degradation. A R90D NDPK-D mutant that does not bind CL was inactive in promoting mitophagy. Similarly, rotenone and 6-hydroxydopamine triggered mitophagy in SH-SY5Y cells was also suppressed by knocking down of NDPK-D. In situ proximity ligation assay (PLA) showed that mitophagy-inducing CL-transfer activity of NDPK-D is closely associated with the dynamin-like GTPase OPA1, implicating fission-fusion dynamics in mitophagy regulation.
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Affiliation(s)
- V E Kagan
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA,Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Bridgeside Point, 100 Technology Drive, Suite 350, Pittsburgh, PA 15219, USA. Tel: 412 624 9474; Fax: 412 624 9361; E-mail:
| | - J Jiang
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Z Huang
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Y Y Tyurina
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - C Desbourdes
- University Grenoble Alpes—UJF, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), U1055, Grenoble, France,Inserm, U1055, Grenoble, France
| | - C Cottet-Rousselle
- University Grenoble Alpes—UJF, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), U1055, Grenoble, France,Inserm, U1055, Grenoble, France
| | - H H Dar
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - M Verma
- Department of Pathology, University of Pittsburgh, Pittsburgh, PA, USA
| | - V A Tyurin
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - A A Kapralov
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - A Cheikhi
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - G Mao
- Department of Environmental and Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - D Stolz
- Department of Cell Biology and Physiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - C M St. Croix
- Department of Cell Biology and Physiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - S Watkins
- Department of Cell Biology and Physiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Z Shen
- Department of Biological Sciences, Wayne State University, Detroit, MI, USA
| | - Y Li
- Department of Biological Sciences, Wayne State University, Detroit, MI, USA
| | - M L Greenberg
- Department of Biological Sciences, Wayne State University, Detroit, MI, USA
| | - M Tokarska-Schlattner
- University Grenoble Alpes—UJF, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), U1055, Grenoble, France,Inserm, U1055, Grenoble, France
| | - M Boissan
- Sorbonne Universités, UPMC Univ Paris 06, Saint-Antoine Research Center, INSERM UMR-S 938, Paris, France,AP-HP, Service de Biochimie et Hormonologie, Hôpital Tenon, Paris, France
| | - M-L Lacombe
- Sorbonne Universités, UPMC Univ Paris 06, Saint-Antoine Research Center, INSERM UMR-S 938, Paris, France
| | - R M Epand
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - C T Chu
- Department of Pathology, University of Pittsburgh, Pittsburgh, PA, USA
| | - R K Mallampalli
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, PA, USA,Medical Specialty Service Line, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
| | - H Bayır
- Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA,Department of Critical Care Medicine, University of Pittsburgh, 3434 Fifth Ave, Pittsburgh, PA 15260, USA. Tel: 412 692 5164; Fax: 412 324 0943; E-mail:
| | - U Schlattner
- University Grenoble Alpes—UJF, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), U1055, Grenoble, France,Inserm, U1055, Grenoble, France,University Grenoble Alpes—UJF, Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), U1055; BP 53, Grenoble cedex 9, F-38041, France. Tel: +33 476 51 46 71; Fax: +33 476 51 42 18; E-mail:
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Haynes B, Zhang Y, Li J, Petit S, Westwell A, Mao G, Shekhar M. Abstract P3-14-06: Evaluation of the therapeutic efficacy of a Rad6 small molecule inhibitor in triple negative breast cancer cells. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p3-14-06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Triple negative breast cancers (TNBCs) lack estrogen and progesterone receptors and Her2/neu amplification, and are hence not treatable with therapies targeting these molecules. TNBCs have upregulated DNA damage response mechanisms, including the Rad6 postreplication repair (PRR) pathway, that potentially contribute to chemoresistance. Rad6 is a major component of the PRR pathway and its ubiquitin conjugating (UBC) activity is critical for its function. Rad6 expression is low in normal breast cells and tissues but the Rad6 homolog Rad6B is overexpressed in invasive, metastatic and chemoresistant BrCas. Constitutive overexpression of Rad6B in MCF10A cells induces resistance to cisplatin and doxorubicin. TCGA analysis of TNBC patient data showed an association between high Rad6B expression (but not Rad6A) and decreased overall survival. We recently reported the development of a novel Rad6-selective small molecule inhibitor (SMI#9) that inhibits Rad6 UBC activity, migration, and induces apoptosis in TNBC cells but has no effect on MCF10A cells. Since SMI#9 has limited aqueous solubility, in this study we synthesized a modified analog of SMI#9 to enable conjugation via a hydrolyzable ester bond to gold nanoparticle (GNP) and to improve delivery. GNP tethered SMI#9 (SMI#9-GNP) was characterized for purity, ligand conjugation and size by thermogravimetric analysis, atomic force microscopy, transmission electron microscopy, UV-Vis spectroscopy and zeta sizer, and for cellular uptake and drug release by FTIR and mass spectrometry. We compared the activities of SMI#9-GNP and free SMI#9 for cytotoxicity and intracellular localization in mesenchymal (MDA-MB-231 and SUM1315) and basal (MDA-MB-468 and HCC1937) subtypes of TNBC, and in MCF10A cells. Whereas free SMI#9 was cytotoxic to all TNBC cells, SMI#9-GNP demonstrated as good or better cytotoxicity than free SMI#9 only in mesenchymal TNBC cells. MCF10A cells were unaffected by both free and SMI#9-GNP. Consistent with cellular sensitivities, SMI#9-GNP is efficiently endocytosed and processed in lysosomes in mesenchymal TNBC cells, while uptake into basal TNBC cells is compromised by cell microenvironment induced SMI#9-GNP aggregation. SMI#9-GNP treatment induces mitochondrial dysfunction, and stabilization and hyperactivation of PARP-1 that was commensurate with autophagy (indicated by LC3-I to LC3-II conversion). Rad6 loss and PARP-1 hyperactivation are associated with mitochondrial dysfunction, and since inhibition of Rad6 induces both mitochondrial dysfunction and PARP-1 activation this implicates a potential novel role for Rad6 in linking these processes. In summary, our data show that SMI#9-GNP is a suitable delivery vehicle and that the SMI#9 released from GNP conjugate functions similarly as free SMI#9. Our data also illustrate how cell microenvironment induced changes in the physical properties of GNP-drug conjugates can have important implications in the application of nanoparticles in cancer therapy. Supported by NIH R21 CA178117.
Citation Format: Haynes B, Zhang Y, Li J, Petit S, Westwell A, Mao G, Shekhar M. Evaluation of the therapeutic efficacy of a Rad6 small molecule inhibitor in triple negative breast cancer cells. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-14-06.
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Affiliation(s)
- B Haynes
- Wayne State University, Detroit, MI; Cardiff University, Cardiff, Wales, United Kingdom
| | - Y Zhang
- Wayne State University, Detroit, MI; Cardiff University, Cardiff, Wales, United Kingdom
| | - J Li
- Wayne State University, Detroit, MI; Cardiff University, Cardiff, Wales, United Kingdom
| | - S Petit
- Wayne State University, Detroit, MI; Cardiff University, Cardiff, Wales, United Kingdom
| | - A Westwell
- Wayne State University, Detroit, MI; Cardiff University, Cardiff, Wales, United Kingdom
| | - G Mao
- Wayne State University, Detroit, MI; Cardiff University, Cardiff, Wales, United Kingdom
| | - M Shekhar
- Wayne State University, Detroit, MI; Cardiff University, Cardiff, Wales, United Kingdom
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Yi L, Liu Y, Quinn P, Fan Y, Feng C, Mao G, Lee K. Abnormality in face scanning by children with Autism Spectrum Disorder is limited to the eye region: Evidence from multi-method analyses of eye tracking. J Vis 2013. [DOI: 10.1167/13.9.842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Mao G, Flach CR, Mendelsohn R, Walters RM. Imaging the distribution of sodium dodecyl sulfate in skin by confocal Raman and infrared microspectroscopy. Pharm Res 2012; 29:2189-201. [PMID: 22477073 PMCID: PMC3399083 DOI: 10.1007/s11095-012-0748-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 03/22/2012] [Indexed: 01/06/2023]
Abstract
Purpose To image SDS distribution across different skin regions, to compare the permeability difference between porcine and human skin, and to evaluate the interaction between SDS and skin. Methods Full thickness porcine and human skin was treated with acyl chain perdeuterated SDS (SDS-d25) at room temperature and at 34 °C for 3, 24 and 40 h. SDS distribution in skin was monitored by confocal Raman and IR microspectroscopic imaging. Permeation profiles of SDS-d25 in skin were derived from the band intensities of the CD2 stretching vibrations. The interaction between SDS and skin was monitored through the CH2 and CD2 stretching frequencies and the Amide I and II spectral region. Results SDS-d25 penetrates both porcine and human skin in a time and temperature-dependent manner, with slightly higher permeability through the stratum corneum (SC) in porcine skin. When SDS permeates into the SC, its chains are more ordered compared to SDS micelles. The secondary structure of keratin in the SC is not affected by SDS-d25. Conclusion The spatial distribution of SDS-d25 in skin was obtained for the first time. Infrared microscopic imaging provides unique opportunities to measure concentration profiles of exogenous materials in skin and offers insights to interaction between permeants and skin. Electronic supplementary material The online version of this article (doi:10.1007/s11095-012-0748-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- G Mao
- Johnson & Johnson Consumer Companies, Inc., 199 Grandview Rd., Skillman, New Jersey 08558-9418, USA.
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Jiang Z, Shen M, Mao G, Chen D, Wang J, Qu J, Lu F. Association between corneal biomechanical properties and myopia in Chinese subjects. Eye (Lond) 2011; 25:1083-9. [PMID: 21546923 DOI: 10.1038/eye.2011.104] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To examine the relationship between corneal biomechanical properties and the degree of myopia. METHODS Chinese subjects (n=172, age: 11-65 years) were divided into diagnostic groups with non-myopia (spherical equivalence (SE)>-0.50 D), low (-3.00 ≤ SE ≤ -0.50 D), moderate (-6.00 ≤ SE < -3.00 D), and high myopia (SE<-6.00 D). Only the right eye of each subject was analyzed. Central corneal thickness (CCT) was measured by optical coherence tomography. An ocular response analyzer was used to measure corneal hysteresis (CH), corneal resistance factor (CRF), intraocular pressure (IOP), and corneal compensated IOP (IOPcc). Refraction was measured by both automated and subjective refractometry and expressed as SE. RESULTS CH was significantly lower in high myopia compared with both low and non-myopia (P ≤ 0.002). CCT was 1.5 times more correlated to CH variation compared with refraction. Similarly, CRF was four times more dependent on CCT than refraction. CH (P<0.001) or CRF (P=0.005) was positively correlated to refraction. Both IOP and IOPcc were negatively correlated to refraction (P<0.001), respectively. CONCLUSIONS CH decreases only in high myopia. Refraction is positively correlated to both CH and CRF but negatively correlated to both IOP and IOPcc. These results indicate that the mechanical strength in anterior segment of the eye is compromised in high myopia. In addition, high myopia may increase the risk of glaucoma.
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Affiliation(s)
- Z Jiang
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical College, Zhejiang, China
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Butryee C, Intaraluk P, Mao G. Risk assessment model for establishing heavy metal limits in health supplements. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Song T, Chen G, Wang Y, Mao G, Wang Y, Bai H. Chemically defined sequential culture media for TH+ cell derivation from human embryonic stem cells. Mol Hum Reprod 2008; 14:619-25. [DOI: 10.1093/molehr/gan058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Liu H, Zhang S, Jiang S, Mao G, Hong X, Yu Y, Zhang Y, Tang G, Xing H, Xu X. Renin-Angiotensin-Aldosterone System (RAAS) gene polymorphisms and antihypertensive response to irbesartan in Chinese hypertensives. ACTA ACUST UNITED AC 2008; 30:307-12. [DOI: 10.1358/mf.2008.30.4.1186077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Chen G, Jiang S, Mao G, Zhang S, Hong X, Tang G, Li Z, Liu X, Zhang Y, Xing H, Wang B, Yu Y, Xu X. CYP2C9 Ile359Leu polymorphism, plasma irbesartan concentration and acute blood pressure reductions in response to irbesartan treatment in Chinese hypertensive patients. ACTA ACUST UNITED AC 2006; 28:19-24. [PMID: 16541193 DOI: 10.1358/mf.2006.28.1.962773] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [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: 10/24/2022]
Abstract
Our previous study demonstrated that the CYP2C9*3 gene variant was significantly associated with elevated plasma irbesartan concentration and blood pressure decline, assessed by a 4-week follow-up and revisit following daily administration of irbesartan. We conducted a further analysis to examine the acute effects of the CYP2C9 polymorphism on plasma concentration and blood pressure through remeasurement 6 h after administration of irbesartan. We used an extreme-sampling approach by selecting individuals from the top and bottom deciles of blood pressure response residuals to irbesartan from the previous study population in Anhui, Taihu, and Dongzhi Counties, in China. A total of 196 subjects were available for the analysis. Pre- and posttreatment systolic and diastolic blood pressures (SBP and DBP), and venous blood samples (0.5, 2, and 6 h following the first treatment) were collected from each individual. Plasma irbesartan concentrations were determined by a standard HPLC/fluorescence method. The observed frequencies were 97.7% for CYP2C9*1 (Ile359) and 2.3% for CYP2C9*3 (Leu359). Subjects with the CYP2C9*1/CYP2C9*3 genotype had significantly higher plasma irbesartan concentrations when compared with those with the CYP2C9*1/CYP2C9*1 genotype (beta +/- SE = 81 +/- 36) and greater DBP response (beta +/- SE = 5.6 +/- 2.5 mmHg) at the 6-h time point after adjusting for important confounders. Our finding suggests that the CYP2C9*3 gene variant significantly alters the plasma concentration and acute DBP response at the 6-h point following irbesartan treatment in Chinese hypertensive patients.
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Affiliation(s)
- G Chen
- Institute of Biomedicine, Anhui Medical University, Department of Pharmacology, Anhui College of Traditional Chinese Medicine, Hefei, Anhui, People's Republic of China
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Mao G. [Spreading of Christianity and western medicine into Henan Province]. Zhonghua Yi Shi Za Zhi 2001; 25:211-5. [PMID: 11613577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
After the Opium war, the aggressors, under the mask of missionaries, came to China by making use of western medicine as its tool for cultural invasion. This paper gives a description on the activities of all sects of Christianity and the institutions set up by them. Hospitals run by Christian Missions became the therapeutic institutions at all levels and made contributions to the prevention and treatment of diseases for local people.
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Sun D, Mao G, Sun H, La P, Cai W. [Specific amplification of the coding sequences of BBTV III, IV, I and their application in BBTV detection]. Wei Sheng Wu Xue Bao 2001; 41:109-12. [PMID: 12549199] [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] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Banana bunchy top virus disease (BBTD) is a disastrous disease in bananas, and it is spreading in the world (including China) by the banana bunchy top virus(BBTV). At present, virus-free plantlets are used to prevent BBTD in banana production, therefore, it is very important to establish a method to detect BBTV quickly, sensitively and specifically. ELISA is now popularly used to detect BBTV. The sensitivity of this method is not high enough, and needs specific antiserum, otherwise, pseudo-positive results often occur. According to DNA coding sequences of component III, IV and I of BBTV isolates from Zhangzhou, China, three pairs of primers are designed to establish a PCR method to specifically amplify parts of coding sequences of the BBTV coat protein, movement protein and replicase-association. This method is also applicable to detect BBTV of bananas or cultured banana seedlings in other regions.
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Affiliation(s)
- D Sun
- Institute of Microbiology, Academy of Chinese Sciences, Beijing 100080, China
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Osuji C, Chen J, Mao G, Ober C, Thomas E. Understanding and controlling the morphology of styrene–isoprene side-group liquid crystalline diblock copolymers. POLYMER 2000. [DOI: 10.1016/s0032-3861(00)00233-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Mao G, Ye S, Ma H. [Application of monocyte strains (THP-1 cells) in study on silicosis in vitro]. Zhonghua Yu Fang Yi Xue Za Zhi 2000; 34:274-7. [PMID: 11372394] [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] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
OBJECTIVE To explore the application of human blood monocyte strain (THP-1 cells) with properties of pulmonary alveolar macrophage in study on pathogenesis of silicosis in vitro. METHODS Effects of cell culture supernatant of THP-1 stimulated by silica or induced and differentiated by phorbol ester (PMA) on proliferation of fibroblast (CHL), formation of Ag-NORs granule, migration of pulmonary alveolar epithelium (CCL-64) and occurrence of silicosis-like pathological changes were observed in rats. Chemo-illuminescence stimulated by silica in PMA-primed THP-1 cells was studied, as compared with that by PMA. RESULTS Supernatant of silica-stimulated THP-1 cell culture could effectively enhance proliferation of CHL cells and increase the mean number of Ag-NORs granule and their dispersion, with a good dose-response relationship, which correlated highly with cytotoxicity index, pulmonary alveolar macrophage (PAM), caused by silica. And, they could also inhibit the migration of CCL-64 and the repair of epithelial damage. The supernatants from silica-stimulated PAM and THP-1 cell culture could cause early silicotic nodule-like lesions in rats. Chemo-illuminescence response in PMA-primed THP-1 cells and PAM was enhanced by stimulation with silica in a dose-dependent pattern. CONCLUSION PMA-primed THP-1 cells may have a prospect of wide application in study on pathogenesis of silicosis and production of silicosis-related cytokine and oxygen free radicals in vitro.
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Affiliation(s)
- G Mao
- Research Division of Pneumoconiosis, School of Public Health, Zhejiang University, Hangzhou 310031, China
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Abstract
The structure of a polymer electrolyte, P(EO)7.5LiN(SO 2CF (3))(2), has been determined by neutron diffraction with isotropic substitution. The Li ions are bonded on average to five ether oxygens belonging to pairs of PEO coils. These are arranged with a considerable degree of extended-range order providing pathways for the Li ion conduction. The lack of ion pairing in this system below 4.8 A is reminiscent of that observed in the remarkable structure of P(EO)6LiAsF (6) and implies that anions and cations are free to migrate independently.
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Affiliation(s)
- G Mao
- Argonne National Laboratory, Argonne, Illinois 60439, USA
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Merenga A, Shilov SV, Kremer F, Mao G, Ober CK, Brehmer M. Molecular Orientation and Dynamics in Ferroelectric Diblock Copolymers Monitored by FT-IR Spectroscopy. Macromolecules 1998. [DOI: 10.1021/ma9809280] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Merenga
- Department of Physics and Geosciences, University of Leipzig, Linnestr., 5, 04103 Leipzig, Germany; Institute of Macromolecular Compounds, Bolshoi pr., 31, 199004 St. Petersburg, Russia; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853; and Bergische Universitat Wuppertal, 42097 Wuppertal, Germany
| | - S. V. Shilov
- Department of Physics and Geosciences, University of Leipzig, Linnestr., 5, 04103 Leipzig, Germany; Institute of Macromolecular Compounds, Bolshoi pr., 31, 199004 St. Petersburg, Russia; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853; and Bergische Universitat Wuppertal, 42097 Wuppertal, Germany
| | - F. Kremer
- Department of Physics and Geosciences, University of Leipzig, Linnestr., 5, 04103 Leipzig, Germany; Institute of Macromolecular Compounds, Bolshoi pr., 31, 199004 St. Petersburg, Russia; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853; and Bergische Universitat Wuppertal, 42097 Wuppertal, Germany
| | - G. Mao
- Department of Physics and Geosciences, University of Leipzig, Linnestr., 5, 04103 Leipzig, Germany; Institute of Macromolecular Compounds, Bolshoi pr., 31, 199004 St. Petersburg, Russia; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853; and Bergische Universitat Wuppertal, 42097 Wuppertal, Germany
| | - Ch. K. Ober
- Department of Physics and Geosciences, University of Leipzig, Linnestr., 5, 04103 Leipzig, Germany; Institute of Macromolecular Compounds, Bolshoi pr., 31, 199004 St. Petersburg, Russia; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853; and Bergische Universitat Wuppertal, 42097 Wuppertal, Germany
| | - M. Brehmer
- Department of Physics and Geosciences, University of Leipzig, Linnestr., 5, 04103 Leipzig, Germany; Institute of Macromolecular Compounds, Bolshoi pr., 31, 199004 St. Petersburg, Russia; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853; and Bergische Universitat Wuppertal, 42097 Wuppertal, Germany
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Abstract
Rod-coil block copolymers are self-assembling polymers that combine the physics of orientational ordering of rodlike polymers and the microphase separation of coil-coil block copolymers. Several new solid-state morphologies were observed in a series of anionically synthesized model poly(hexyl isocyanate-b-styrene) rod-coil diblock copolymers examined by transmission electron microscopy and selected-area electron diffraction. The rod-coils formed smectic C-like and O-like morphologies with domain sizes ranging from tens of nanometers to almost 1 micrometer. Both structural and orientational changes were found for increasing rod volume fractions. In addition, some morphologies exhibited spontaneous long-range orientational order over many tens of micrometers.
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Affiliation(s)
- JT Chen
- J. T. Chen and E. L. Thomas, Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. C. K. Ober and G.-p. Mao, Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
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Mao G, Li Z, Zhuo Y. Self-consistent relativistic Boltzmann-Uehling-Uhlenbeck equation for the Delta distribution function. Phys Rev C Nucl Phys 1996; 53:2933-2948. [PMID: 9971281 DOI: 10.1103/physrevc.53.2933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
An investigation of Serjania salzmanniana for biologically active substances has led to the isolation of two novel saponins, salzmannianoside A (3-O-[[beta-D- glucopyranosyl-(1-->4)]-[alpha-L-rhamnopyranosyl-(1-->2)]-alpha-L- arabinopyranosyl] gypsogenin) [3] and salzmannianoside B (3-O-[[beta-D-glucopyranosyl-(1-->4)]-[alpha-L- arabinopyranosyl-(1-->3)-alpha-L-rhamnopyranosyl-(1-->2)] -alpha-L-arabinopyranosyl] hederagenin) (4). Two known saponins, pulsatilla saponin D (3-O-[[beta-D- glucopyranosyl-(1-->4)]-[alpha-L-rhamnopyranosyl-(1-->2)]-alpha-L- arabinopyranosyl] hederagenin) (1) and 3-O-[[beta-D-glucopyranosyl-(1-->4)]-[alpha-L-rhamnopyranosyl-(1-->2)]-a lpha-L- arabinopyranosyl] oleanolic acid (2) were also isolated from this plant. The structures of 3 and 4 were elucidated by FABMS and 2D NMR techniques. All these four saponins were mollusicidal, causing 70-100% mortality at 10 ppm against Biomphalaria alexandrina, a vector of Schistosoma mansoni in the Nile Valley. The saponins also showed antifungal activity against Cryptococcus neoformans and Candida albicans at minimal inhibitory concentrations of 8 and 16 micrograms/mL, respectively.
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Affiliation(s)
- O A Ekabo
- Program for Collaborative Research in the Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago 60612, USA
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Sun F, Castner DG, Mao G, Wang W, McKeown P, Grainger DW. Spontaneous Polymer Thin Film Assembly and Organization Using Mutually Immiscible Side Chains. J Am Chem Soc 1996. [DOI: 10.1021/ja952225t] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- F. Sun
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, National ESCA and Surface Analysis Center for Biomedical Problems and Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, Physical Electronics Inc., 6509 Flying Cloud Drive, Eden Prairie, Minnesota 55344
| | - D. G. Castner
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, National ESCA and Surface Analysis Center for Biomedical Problems and Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, Physical Electronics Inc., 6509 Flying Cloud Drive, Eden Prairie, Minnesota 55344
| | - G. Mao
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, National ESCA and Surface Analysis Center for Biomedical Problems and Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, Physical Electronics Inc., 6509 Flying Cloud Drive, Eden Prairie, Minnesota 55344
| | - W. Wang
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, National ESCA and Surface Analysis Center for Biomedical Problems and Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, Physical Electronics Inc., 6509 Flying Cloud Drive, Eden Prairie, Minnesota 55344
| | - P. McKeown
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, National ESCA and Surface Analysis Center for Biomedical Problems and Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, Physical Electronics Inc., 6509 Flying Cloud Drive, Eden Prairie, Minnesota 55344
| | - D. W. Grainger
- Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, National ESCA and Surface Analysis Center for Biomedical Problems and Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, Physical Electronics Inc., 6509 Flying Cloud Drive, Eden Prairie, Minnesota 55344
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Mao G, Winokur MJ, Karasz FE. Dual alkali-metal-ion channel structures in poly(p-phenylenevinylene). Phys Rev B Condens Matter 1996; 53:R463-R467. [PMID: 9983056 DOI: 10.1103/physrevb.53.r463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bierer DE, Dener JM, Dubenko LG, Gerber RE, Litvak J, Peterli S, Peterli-Roth P, Truong TV, Mao G, Bauer BE. Novel 1,2-dithiins: synthesis, molecular modeling studies, and antifungal activity. J Med Chem 1995; 38:2628-48. [PMID: 7629803 DOI: 10.1021/jm00014a016] [Citation(s) in RCA: 49] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The first structure-activity study involving the 1,2-dithiin class of compounds (1,2-dithiacyclohexadienes) is herein reported. A series of 3,6-disubstituted 1,2-dithiins was synthesized from dithiins 1d and 1e and evaluated as antifungal agents. A new and versatile synthesis of dithiins 1d and 1e is reported which is amenable to scale-up at the kilogram level. The novelty of the process derives from the use of beta-mercaptopropionitrile as the thiophile, relying on a beta-elimination strategy and subsequent oxidation to create the 1,2-dithiin ring. Optimal geometries of dithiins 1d, 18i, and 45 and model dithiin 61 were determined by molecular mechanics and Hartree-Fock molecular orbital calculations. Two possible mechanisms of action are presented for the 1,2-dithiin class of compounds to explain their observed antifungal activities against Candida albicans, Cryptococcus neoformans, and Aspergillus fumigatus.
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Affiliation(s)
- D E Bierer
- Shaman Pharmaceuticals, Inc., South San Francisco, California 94080-4812, USA
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Mao G, Gao Z, Wang Q. [Intrapleural administration of LAK cells combined with rIL2 in the treatment of advanced lung cancer with malignant pleural effusion]. Zhonghua Jie He He Hu Xi Za Zhi 1995; 18:83-4, 127. [PMID: 7553956] [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] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Thirty-three patients with malignant pleural effusions due to advanced lung cancer were treated by intrapleural administration of LAK cells combined with rIL2. The pleural effusions disappeared in 18 patients and significantly decreased in 12. Three patients did not respond to the treatment. No serious side effect was found in 33 patients. The results indicate that transfer of LAK cells combined with rIL2 in the treatment of patients with malignant pleural effusions due to advanced lung cancer is effective and safe.
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Affiliation(s)
- G Mao
- Affiliated Hospital, Nantong Medical college
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Papanek P, Fischer JE, Sauvajol JL, Dianoux AJ, Mao G, Winokur MJ, Karasz FE. Inelastic-neutron-scattering studies of poly(p-phenylene vinylene). Phys Rev B Condens Matter 1994; 50:15668-15677. [PMID: 9975932 DOI: 10.1103/physrevb.50.15668] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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40
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Mao G, Li Z, Zhuo Y, Han Y, Yu Z. Study of in-medium NN inelastic cross section from relativistic Boltzmann-Uehling-Uhlenbeck approach. Phys Rev C Nucl Phys 1994; 49:3137-3146. [PMID: 9969592 DOI: 10.1103/physrevc.49.3137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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41
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Mao G, Fischer JE, Karasz FE, Winokur MJ. Nonplanarity and ring torsion in poly(p‐phenylene vinylene). A neutron‐diffraction study. J Chem Phys 1993. [DOI: 10.1063/1.464616] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Swimmer C, Kashevsky H, Mao G, Kafatos FC. Positive and negative DNA elements of the Drosophila grimshawi s18 chorion gene assayed in Drosophila melanogaster. Dev Biol 1992; 152:103-12. [PMID: 1628750 DOI: 10.1016/0012-1606(92)90160-i] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 12/27/2022]
Abstract
Germ line transformation has been used to map the cis regulatory DNA elements responsible for the precise and evolutionarily stable developmental expression of the s18 chorion gene. Constructs containing chimeric combinations of Drosophila melanogaster and D. grimshawi DNA regions, as well as D. grimshawi sequences alone, can direct expression in the follicular epithelium, in an s18-specific temporal and spatial pattern. The results indicate that both positive and negative regulatory elements can function when transferred from D. grimshawi to D. melanogaster. The first ca. 100 bp of the 5'-flanking DNA region constitute a minimal, developmentally regulated promoter, expression of which is inhibited by the next 100-bp DNA segment and activated by positive elements located further upstream. Expression of the minimal promoter can also be enhanced by more distant chorion regulatory elements, provided the inhibitory DNA segment is absent.
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Affiliation(s)
- C Swimmer
- Department of Cellular and Developmental Biology, Harvard University, Cambridge, Massachusetts 02138
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Scaglioni PP, Melegari M, Mao G, Pasquinelli C. [HBV DNA in mononuclear cells of peripheral blood in acute hepatitis B: a comparative analysis of Southern blot and polymerase chain reaction (PCR)]. Medicina (Firenze) 1990; 10:32-4. [PMID: 2381278] [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] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Hepatitis B virus (HBV) infection of peripheral blood mononuclear cells (PBMCs) has been observed in all stages of liver disease. The data available on acute hepatitis patients are limited. We therefore focused our attention on the presence of HBV DNA sequences in PMBCs of 30 patients with acute type B hepatitis. Southern Blot analysis showed no HBV sequences in PMBCs, although the sensitivity of our method enabled us to detect as low as 1 pg of cloned HBV insert. On the other hand, Polymerase Chain Reaction (PCR) demonstrated the presence of HBV related sequences in 14 out of 30 patients (5 HBeAg positive, 9 anti HBeAg positive). Our results indicate that the involvement of PMBCs with HBV during acute infection is not correlated with viral replication and occurs at a very low level, so that its detection by traditional Southern Blotting can prove ineffective.
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