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Le Large TYS, Bijlsma MF, El Hassouni B, Mantini G, Lagerweij T, Henneman AA, Funel N, Kok B, Pham TV, de Haas R, Morelli L, Knol JC, Piersma SR, Kazemier G, van Laarhoven HWM, Giovannetti E, Jimenez CR. Focal adhesion kinase inhibition synergizes with nab-paclitaxel to target pancreatic ductal adenocarcinoma. J Exp Clin Cancer Res 2021; 40:91. [PMID: 33750427 PMCID: PMC7941981 DOI: 10.1186/s13046-021-01892-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/24/2021] [Indexed: 02/08/2023] Open
Abstract
Background Pancreatic ductal adenocarcinoma (PDAC) is a very lethal disease, with minimal therapeutic options. Aberrant tyrosine kinase activity influences tumor growth and is regulated by phosphorylation. We investigated phosphorylated kinases as target in PDAC. Methods Mass spectrometry-based phosphotyrosine proteomic analysis on PDAC cell lines was used to evaluate active kinases. Pathway analysis and inferred kinase activity analysis was performed to identify novel targets. Subsequently, we investigated targeting of focal adhesion kinase (FAK) in vitro with drug perturbations in combination with chemotherapeutics used against PDAC. Tyrosine phosphoproteomics upon treatment was performed to evaluate signaling. An orthotopic model of PDAC was used to evaluate the combination of defactinib with nab-paclitaxel. Results PDAC cell lines portrayed high activity of multiple receptor tyrosine kinases to various degree. The non-receptor kinase, FAK, was identified in all cell lines by our phosphotyrosine proteomic screen and pathway analysis. Targeting of this kinase with defactinib validated reduced phosphorylation profiles. Additionally, FAK inhibition had anti-proliferative and anti-migratory effects. Combination with (nab-)paclitaxel had a synergistic effect on cell proliferation in vitro and reduced tumor growth in vivo. Conclusions Our study shows high phosphorylation of several oncogenic receptor tyrosine kinases in PDAC cells and validated FAK inhibition as potential synergistic target with Nab-paclitaxel against this devastating disease. Supplementary Information The online version contains supplementary material available at 10.1186/s13046-021-01892-z.
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Affiliation(s)
- T Y S Le Large
- Department of Surgery, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University Amsterdam, Amsterdam, The Netherlands.,Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands.,Laboratory for Experimental Oncology and Radiobiology, Cancer Center Amsterdam, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, the Netherlands.,OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - M F Bijlsma
- Laboratory for Experimental Oncology and Radiobiology, Cancer Center Amsterdam, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, the Netherlands.,Oncode Institute, Amsterdam, The Netherlands
| | - B El Hassouni
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - G Mantini
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands.,OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands.,Cancer Pharmacology Lab, AIRC-Start-Up, Fondazione Pisana per la Scienza, Pisa, Italy
| | - T Lagerweij
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands.,Department of Neurosurgery, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University Amsterdam, Amsterdam, The Netherlands
| | - A A Henneman
- OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - N Funel
- Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
| | - B Kok
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - T V Pham
- OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - R de Haas
- OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - L Morelli
- Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
| | - J C Knol
- OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - S R Piersma
- OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands
| | - G Kazemier
- Department of Surgery, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University Amsterdam, Amsterdam, The Netherlands
| | - H W M van Laarhoven
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands.,Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - E Giovannetti
- Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands. .,Cancer Pharmacology Lab, AIRC-Start-Up, Fondazione Pisana per la Scienza, Pisa, Italy.
| | - C R Jimenez
- OncoProteomics Laboratory, Department of Medical Oncology, Cancer, Cancer Center Amsterdam, Amsterdam University Medical Centers, VU University, De Boelelaan 1117, 1081, HV, Amsterdam, The Netherlands.
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2
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Mantini G, Vallés AM, Le Large TYS, Capula M, Funel N, Pham TV, Piersma SR, Kazemier G, Bijlsma MF, Giovannetti E, Jimenez CR. Co-expression analysis of pancreatic cancer proteome reveals biology and prognostic biomarkers. Cell Oncol (Dordr) 2020; 43:1147-1159. [PMID: 32860207 PMCID: PMC7716908 DOI: 10.1007/s13402-020-00548-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2020] [Indexed: 01/02/2023] Open
Abstract
Purpose Despite extensive biological and clinical studies, including comprehensive genomic and transcriptomic profiling efforts, pancreatic ductal adenocarcinoma (PDAC) remains a devastating disease, with a poor survival and limited therapeutic options. The goal of this study was to assess co-expressed PDAC proteins and their associations with biological pathways and clinical parameters. Methods Correlation network analysis is emerging as a powerful approach to infer tumor biology from omics data and to prioritize candidate genes as biomarkers or drug targets. In this study, we applied a weighted gene co-expression network analysis (WGCNA) to the proteome of 20 surgically resected PDAC specimens (PXD015744) and confirmed its clinical value in 82 independent primary cases. Results Using WGCNA, we obtained twelve co-expressed clusters with a distinct biology. Notably, we found that one module enriched for metabolic processes and epithelial-mesenchymal-transition (EMT) was significantly associated with overall survival (p = 0.01) and disease-free survival (p = 0.03). The prognostic value of three proteins (SPTBN1, KHSRP and PYGL) belonging to this module was confirmed using immunohistochemistry in a cohort of 82 independent resected patients. Risk score evaluation of the prognostic signature confirmed its association with overall survival in multivariate analyses. Finally, immunofluorescence analysis confirmed co-expression of SPTBN1 and KHSRP in Hs766t PDAC cells. Conclusions Our WGCNA analysis revealed a PDAC module enriched for metabolic and EMT-associated processes. In addition, we found that three of the proteins involved were associated with PDAC survival. Electronic supplementary material The online version of this article (10.1007/s13402-020-00548-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- G Mantini
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam, The Netherlands.,Fondazione Pisana Per La Scienza, Pisa, Italy
| | - A M Vallés
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - T Y S Le Large
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam, The Netherlands.,Amsterdam UMC, Univ of Amsterdam, Laboratory for Experimental Oncology and Radiobiology, Amsterdam, The Netherlands.,Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Surgery, Amsterdam, The Netherlands
| | - M Capula
- Fondazione Pisana Per La Scienza, Pisa, Italy
| | - N Funel
- U.O. Anatomia ed Istologia Patologica II Azienda Ospedaliero Universitaria Pisana , Pisa, Italy
| | - T V Pham
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - S R Piersma
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - G Kazemier
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Surgery, Amsterdam, The Netherlands
| | - M F Bijlsma
- U.O. Anatomia ed Istologia Patologica II Azienda Ospedaliero Universitaria Pisana , Pisa, Italy.,Oncode Institute, Amsterdam, The Netherlands
| | - E Giovannetti
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam, The Netherlands. .,Fondazione Pisana Per La Scienza, Pisa, Italy.
| | - C R Jimenez
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Medical Oncology, Cancer Center Amsterdam, Amsterdam, The Netherlands.
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3
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Pham TTT, Bi X, Hoang HTT, Ishizaki A, Nguyen MTP, Nguyen CH, Nguyen HP, Pham TV, Ichimura H. Human Papillomavirus Genotypes and HPV16 E6/E7 Variants among Patients with Genital Cancers in Vietnam. Jpn J Infect Dis 2018; 71:419-426. [PMID: 29962490 DOI: 10.7883/yoken.jjid.2018.206] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We previously reported human papillomavirus type 52 (HPV52) as the most prevalent high-risk genotype in non-cancer individuals in Vietnam. This study aimed to evaluate HPV genotypes and HPV16 E6 and E7 (E6/E7) gene variations in Vietnamese patients with genital cancers. Biopsy samples were collected from 124 Vietnamese patients with genital cancers (20 with vaginal, 50 with vulvar, and 54 with penile cancer). The HPV-DNA was amplified and genotyped, and HPV16 E6/E7 genes were compared with those previously reported for women with normal cervical cytology (N = 23). HPV-DNA was detected in 80.6% (100/124) of the cancer patients (80.0% of vaginal, 82.0% of vulvar, and 79.6% of penile), with HPV16/18 in 86.0% (86/100) and HPV52 in 7.0% (7/100) of the HPV-positive samples. The HPV-DNA prevalence and HPV genotype distribution did not significantly differ among the genital cancer patients (both P = 0.95). Significantly fewer instances of the HPV16 A4 sublineage (34.8% vs. 82.6%, P < 0.0001) and HPV16 E7 29S (36.4% vs. 87.0%, P = 0.0002) occurred in the cancer patients than in the women with normal cytology. Our results indicate that HPV16/18 accounts for more than 85% of genital cancers in Vietnam, and the HPV16 sublineage A4 containing E7 29S may be less oncogenic.
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Affiliation(s)
- Trang Thi Thu Pham
- Department of Viral Infection and International Health, Graduate School of Medical Sciences/Advanced Preventive Medical Sciences, Kanazawa University
| | - Xiuqiong Bi
- Department of Viral Infection and International Health, Graduate School of Medical Sciences/Advanced Preventive Medical Sciences, Kanazawa University
| | | | - Azumi Ishizaki
- Department of Viral Infection and International Health, Graduate School of Medical Sciences/Advanced Preventive Medical Sciences, Kanazawa University
| | | | | | | | | | - Hiroshi Ichimura
- Department of Viral Infection and International Health, Graduate School of Medical Sciences/Advanced Preventive Medical Sciences, Kanazawa University
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Abstract
MOTIVATION Omics studies aim to find significant changes due to biological or functional perturbation. However, gene and protein expression profiling experiments contain inherent technical variation. In discovery proteomics studies where the number of samples is typically small, technical variation plays an important role because it contributes considerably to the observed variation. Previous methods place both technical and biological variations in tightly integrated mathematical models that are difficult to adapt for different technological platforms. Our aim is to derive a statistical framework that allows the inclusion of a wide range of technical variability. RESULTS We introduce a new method called the simulated linear test, or the s-test, that is easy to implement and easy to adapt for different models of technical variation. It generates virtual data points from the observed values according to a pre-defined technical distribution and subsequently employs linear modeling for significance analysis. We demonstrate the flexibility of the proposed approach by deriving a new significance test for quantitative discovery proteomics for which missing values have been a major issue for traditional methods such as the t-test. We evaluate the result on two label-free (phospho) proteomics datasets based on ion-intensity quantitation. AVAILABILITY AND IMPLEMENTATION Available at http://www.oncoproteomics.nl/software/stest.html CONTACT : t.pham@vumc.nl.
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Affiliation(s)
- T V Pham
- OncoProteomics Laboratory, Department of Medical Oncology, VU University Medical Center, 1081 HV Amsterdam, The Netherlands
| | - C R Jimenez
- OncoProteomics Laboratory, Department of Medical Oncology, VU University Medical Center, 1081 HV Amsterdam, The Netherlands
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5
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Bridel C, Koel-Simmelink MJA, Peferoen L, Derada Troletti C, Durieux S, Gorter R, Nutma E, Gami P, Iacobaeus E, Brundin L, Kuhle J, Vrenken H, Killestein J, Piersma SR, Pham TV, De Vries HE, Amor S, Jimenez CR, Teunissen CE. Brain endothelial cell expression of SPARCL-1 is specific to chronic multiple sclerosis lesions and is regulated by inflammatory mediators in vitro. Neuropathol Appl Neurobiol 2017; 44:404-416. [PMID: 28543098 DOI: 10.1111/nan.12412] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 11/25/2016] [Revised: 05/18/2017] [Accepted: 05/24/2017] [Indexed: 02/05/2023]
Abstract
AIMS Cell matrix modulating protein SPARCL-1 is highly expressed by astrocytes during CNS development and following acute CNS damage. Applying NanoLC-MS/MS to CSF of RRMS and SPMS patients, we identified SPARCL-1 as differentially expressed between these two stages of MS, suggesting a potential as CSF biomarker to differentiate RRMS from SPMS and a role in MS pathogenesis. METHODS This study examines the potential of SPARCL-1 as CSF biomarker discriminating RRMS from SPMS in three independent cohorts (n = 249), analyses its expression pattern in MS lesions (n = 26), and studies its regulation in cultured human brain microvasculature endothelial cells (BEC) after exposure to MS-relevant inflammatory mediators. RESULTS SPARCL-1 expression in CSF was significantly higher in SPMS compared to RRMS in a Dutch cohort of 76 patients. This finding was not replicated in 2 additional cohorts of MS patients from Sweden (n = 81) and Switzerland (n = 92). In chronic MS lesions, but not active lesions or NAWM, a vessel expression pattern of SPARCL-1 was observed in addition to the expression by astrocytes. EC were found to express SPARCL-1 in chronic MS lesions, and SPARCL-1 expression was regulated by MS-relevant inflammatory mediators in cultured human BEC. CONCLUSIONS Conflicting results of SPARCL-1's differential expression in CSF of three independent cohorts of RRMS and SPMS patients precludes its use as biomarker for disease progression. The expression of SPARCL-1 by BEC in chronic MS lesions together with its regulation by inflammatory mediators in vitro suggest a role for SPARCL-1 in MS neuropathology, possibly at the brain vascular level.
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Affiliation(s)
- C Bridel
- Department of Clinical Chemistry, Neurochemistry Lab and Biobank, VU Medical Centre, Amsterdam, The Netherlands
| | - M J A Koel-Simmelink
- Department of Clinical Chemistry, Neurochemistry Lab and Biobank, VU Medical Centre, Amsterdam, The Netherlands
| | - L Peferoen
- Department of Pathology, VU Medical Centre, Amsterdam, The Netherlands
| | - C Derada Troletti
- Department of Molecular Cell Biology and Immunology, Neuroscience Campus Amsterdam, VU University Medical Centre, Amsterdam, The Netherlands
| | - S Durieux
- Department of Clinical Chemistry, Neurochemistry Lab and Biobank, VU Medical Centre, Amsterdam, The Netherlands
| | - R Gorter
- Department of Pathology, VU Medical Centre, Amsterdam, The Netherlands
| | - E Nutma
- Department of Pathology, VU Medical Centre, Amsterdam, The Netherlands
| | - P Gami
- Department of Pathology, VU Medical Centre, Amsterdam, The Netherlands
| | - E Iacobaeus
- Department of Clinical Neuroscience, Neuroimmunology Unit, Karolinska Institute, Solna, Sweden.,Center for Molecular Medicine, Stockholm, Sweden
| | - L Brundin
- Department of Clinical Neuroscience, Neuroimmunology Unit, Karolinska Institute, Solna, Sweden.,Center for Molecular Medicine, Stockholm, Sweden
| | - J Kuhle
- Neurology, Department of Medicine, Biomedicine and Clinical Research, University Hospital Basel, Basel, Switzerland
| | - H Vrenken
- Department of Radiology and Nuclear Medicine and Department of Physics and Medical Technology, VU University Medical Center, Amsterdam, The Netherlands
| | - J Killestein
- Department of Neurology, MS Centre Amsterdam, VU Medical Centre, Amsterdam, The Netherlands
| | - S R Piersma
- Department of Medical Oncology, OncoProteomics Laboratory, VU Medical Centre, Amsterdam, The Netherlands
| | - T V Pham
- Department of Medical Oncology, OncoProteomics Laboratory, VU Medical Centre, Amsterdam, The Netherlands
| | - H E De Vries
- Department of Molecular Cell Biology and Immunology, Neuroscience Campus Amsterdam, VU University Medical Centre, Amsterdam, The Netherlands
| | - S Amor
- Department of Pathology, VU Medical Centre, Amsterdam, The Netherlands.,Queen Mary University of London, Blizard Institute, Barts and The London School of Medicine and Dentistry, London, UK
| | - C R Jimenez
- Department of Medical Oncology, OncoProteomics Laboratory, VU Medical Centre, Amsterdam, The Netherlands
| | - C E Teunissen
- Department of Clinical Chemistry, Neurochemistry Lab and Biobank, VU Medical Centre, Amsterdam, The Netherlands
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Zahnd G, Vila L, Pham TV, Marty A, Laczkowski P, Savero Torres W, Beigné C, Vergnaud C, Jamet M, Attané JP. Comparison of the use of NiFe and CoFe as electrodes for metallic lateral spin valves. Nanotechnology 2016; 27:035201. [PMID: 26637104 DOI: 10.1088/0957-4484/27/3/035201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Spin injection and detection in Co60Fe40-based all-metallic lateral spin valves have been studied at both room and low temperatures. The obtained spin signals amplitudes have been compared to those of identical Ni80Fe20-based devices. The replacement of Ni80Fe20 by CoFe allows increasing the spin signal amplitude by up to one order of magnitude, thus reaching 50 mΩ at room temperature. The spin signal dependence with the distance between the ferromagnetic electrodes has been analyzed using both a 1D spin-transport model and finite element method simulations. The enhancement of the spin signal amplitude when using CoFe electrodes can be explained by a higher effective polarization.
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Affiliation(s)
- G Zahnd
- Université Grenoble Alpes, INAC-SP2M, F-38000 Grenoble, France. CEA, Institut Nanosciences et Cryogénie, SP2M, F-38000 Grenoble, France
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Pham HV, Ishizaki A, Nguyen CH, Saina MC, Hoang HTT, Tran VT, Bi X, Pham TV, Ichimura H. Change in the Prevalence of HIV-1 and the Rate of Transmitted Drug-Resistant HIV-1 in Haiphong, Northern Vietnam. AIDS Res Hum Retroviruses 2015; 31:757-9. [PMID: 25970090 DOI: 10.1089/aid.2015.0071] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We previously reported a significant decrease in HIV-1 prevalence, with no increase in drug-resistant HIV-1 among injecting drug users (IDU), female sex workers (FSW), and blood donors (BD), in Haiphong, Vietnam, from 2007 to 2009. In 2012, 388 IDU, 51 FSW, and 200 BD were recruited for further analysis. None had a history of antiretroviral treatment. From 2007 to 2012, HIV-1 prevalence was reduced from 35.9% to 18.6% (p<0.001), 23.1% to 9.8% (p<0.05), and 2.9% to 1% (p=0.29) in IDU, FSW, and BD, respectively. Of 79 anti-HIV-1 antibody-positive samples, 61 were successfully analyzed for the pol-reverse transcriptase (RT) region. All HIV-1 strains were CRF01_AE. Nonnucleoside RT inhibitor-resistant mutations, Y181C/I, were detected in three subjects; one had the nucleoside RT inhibitor-resistant mutations L74V and M184V and one had E138K. The prevalence of transmitted drug-resistant HIV-1 in Haiphong increased slightly from 1.8% in 2007 to 6.6% in 2012 (p=0.06).
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Affiliation(s)
- Hung Viet Pham
- Department of Viral Infection and International Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Azumi Ishizaki
- Department of Viral Infection and International Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Cuong Hung Nguyen
- Department of Viral Infection and International Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
- Hai Phong Medical University, Hai Phong, Vietnam
| | - Matilda Chelimo Saina
- Department of Viral Infection and International Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | | | - Vuong Thi Tran
- Department of Viral Infection and International Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
- Hai Phong Medical University, Hai Phong, Vietnam
| | - Xiuqiong Bi
- Department of Viral Infection and International Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | | | - Hiroshi Ichimura
- Department of Viral Infection and International Health, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
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8
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Ishizaki A, Matsushita K, Hoang HTT, Agdamag DM, Nguyen CH, Tran VT, Sasagawa T, Saikawa K, Lihana R, Pham HV, Bi X, Ta VT, Van Pham T, Ichimura H. E6 and E7 variants of human papillomavirus-16 and -52 in Japan, the Philippines, and Vietnam. J Med Virol 2013; 85:1069-76. [PMID: 23588734 DOI: 10.1002/jmv.23566] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2013] [Indexed: 12/19/2022]
Abstract
Human papillomavirus (HPV) has several intragenotypic variants with different geographical and ethnic distributions. This study aimed to elucidate the distribution patterns of E6 and E7 (E6/E7) intragenotypic variants of HPV type 16 (HPV-16), which is most common worldwide, and HPV-52, which is common in Asian countries such as Japan, the Philippines, and Vietnam. In previous studies, genomic DNA samples extracted from cervical swabs were collected from female sex workers in these three countries and found to be positive for HPV-16 or HPV-52. Samples were amplified further for their E6/E7 genes using type-specific primers and analyzed genetically. Seventy-nine HPV-16 E6/E7 genes were analyzed successfully and grouped into three lineages: European (Prototype), European (Asian), and African-2. The prevalences of HPV-16 European (Prototype)/European (Asian) lineages were 19.4%/80.6% (n = 31) in Japan, 75.0%/20.8% (n = 24) in the Philippines, and 0%/95.8% (n = 24) in Vietnam. The 109 HPV-52 E6/E7 genes analyzed successfully were grouped into four lineages, A-D; the prevalences of lineages A/B/C/D were, respectively, 5.1%/92.3%/0%/2.6% in Japan (n = 39), 34.4%/62.5%/0%/3.1% in the Philippines (n = 32), and 15.8%/73.7%/7.9%/2.6% in Vietnam (n = 38). The distribution patterns of HPV-16 and HPV-52 lineages in these countries differed significantly (P < 0.000001 and P = 0.0048, respectively). There was no significant relationship between abnormal cervical cytology and either HPV-16 E6/E7 lineages or specific amino acid mutations, such as E6 D25E, E6 L83V, and E7 N29S. Analysis of HPV-16 and HPV-52 E6/E7 genes can be a useful molecular-epidemiological tool to distinguish geographical diffusion routes of these HPV types in Asia.
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Affiliation(s)
- Azumi Ishizaki
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
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9
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Posthumadeboer J, Piersma SR, Pham TV, van Egmond PW, Knol JC, Cleton-Jansen AM, van Geer MA, van Beusechem VW, Kaspers GJL, van Royen BJ, Jiménez CR, Helder MN. Surface proteomic analysis of osteosarcoma identifies EPHA2 as receptor for targeted drug delivery. Br J Cancer 2013; 109:2142-54. [PMID: 24064975 PMCID: PMC3798973 DOI: 10.1038/bjc.2013.578] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [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] [Revised: 08/23/2013] [Accepted: 08/28/2013] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Osteosarcoma (OS) is the most common bone tumour in children and adolescents. Despite aggressive therapy regimens, treatment outcomes are unsatisfactory. Targeted delivery of drugs can provide higher effective doses at the site of the tumour, ultimately improving the efficacy of existing therapy. Identification of suitable receptors for drug targeting is an essential step in the design of targeted therapy for OS. METHODS We conducted a comparative analysis of the surface proteome of human OS cells and osteoblasts using cell surface biotinylation combined with nano-liquid chromatography - tandem mass spectrometry-based proteomics to identify surface proteins specifically upregulated on OS cells. This approach generated an extensive data set from which we selected a candidate to study for its suitability as receptor for targeted treatment delivery to OS. First, surface expression of the ephrin type-A receptor 2 (EPHA2) receptor was confirmed using FACS analysis. Ephrin type-A receptor 2 expression in human tumour tissue was tested using immunohistochemistry. Receptor targeting and internalisation studies were conducted to assess intracellular uptake of targeted modalities via EPHA2. Finally, tissue micro arrays containing cores of human OS tissue were stained using immunohistochemistry and EPHA2 staining was correlated to clinical outcome measures. RESULTS Using mass spectrometry, a total of 2841 proteins were identified of which 156 were surface proteins significantly upregulated on OS cells compared with human primary osteoblasts. Ephrin type-A receptor 2 was highly upregulated and the most abundant surface protein on OS cells. In addition, EPHA2 was expressed in a vast majority of human OS samples. Ephrin type-A receptor 2 effectively mediates internalisation of targeted adenoviral vectors into OS cells. Patients with EPHA2-positive tumours showed a trend toward inferior overall survival. CONCLUSION The results presented here suggest that the EPHA2 receptor can be considered an attractive candidate receptor for targeted delivery of therapeutics to OS.
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Affiliation(s)
- J Posthumadeboer
- Department of Orthopaedic Surgery, VU University Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands
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Kim SH, Jung DI, Yang IY, Jang SH, Kim J, Truong TT, Pham TV, Truong NU, Lee KY, Jang YS. Application of an M-cell-targeting ligand for oral vaccination induces efficient systemic and mucosal immune responses against a viral antigen. Int Immunol 2013; 25:623-32. [DOI: 10.1093/intimm/dxt029] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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Kim SH, Yang IY, Jang SH, Kim J, Truong TT, Van Pham T, Truong NU, Lee KY, Jang YS. C5a receptor-targeting ligand-mediated delivery of dengue virus antigen to M cells evokes antigen-specific systemic and mucosal immune responses in oral immunization. Microbes Infect 2013; 15:895-902. [PMID: 23892099 DOI: 10.1016/j.micinf.2013.07.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [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: 10/20/2012] [Revised: 04/03/2013] [Accepted: 07/16/2013] [Indexed: 12/16/2022]
Abstract
Oral mucosal immunization is a feasible and economic vaccination strategy. In order to achieve a successful oral mucosal vaccination, antigen delivery to gut immune inductive site and avoidance of oral tolerance induction should be secured. One promising approach is exploring the specific molecules expressed on the apical surfaces of M cells that have potential for antigen uptake and immune stimulation. We previously identified complement 5a receptor (C5aR) expression on human M-like cells and mouse M cells and confirmed its non-redundant role as a target receptor for antigen delivery to M cells using a model antigen. Here, we applied the OmpH ligand, which is capable of targeting the ligand-conjugated antigen to M cells to induce specific mucosal and systemic immunities against the EDIII of dengue virus (DENV). Oral immunization with the EDIII-OmpH efficiently targeted the EDIII to M cells and induced EDIII-specific immune responses comparable to those induced by co-administration of EDIII with cholera toxin (CT). Also, the enhanced responses by OmpH were characterized as Th2-skewed responses. Moreover, oral immunization using EDIII-OmpH did not induce systemic tolerance against EDIII. Collectively, we suggest that OmpH-mediated targeting of antigens to M cells could be used for an efficient oral vaccination against DENV infection.
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Affiliation(s)
- Sae-Hae Kim
- Department of Molecular Biology, Chonbuk National University, Jeonju 561-756, Republic of Korea; Institute for Molecular Biology and Genetics, Chonbuk National University, Jeonju 561-756, Republic of Korea
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12
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Kim SH, Jung DI, Yang IY, Jang SH, Kim J, Truong TT, Van Pham T, Truong NU, Lee KY, Jang YS. WITHDRAWN: Application of M cell targeting ligand for oral vaccination to induce efficient systemic and mucosal immune responses against viral antigens. Immunobiology 2013. [DOI: 10.1016/j.imbio.2013.04.016] [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: 10/26/2022]
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13
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Hoang HTT, Ishizaki A, Nguyen CH, Tran VT, Matsushita K, Saikawa K, Hosaka N, Pham HV, Bi X, Ta VT, Van Pham T, Ichimura H. Infection with high-risk HPV types among female sex workers in northern Vietnam. J Med Virol 2012; 85:288-94. [PMID: 23161344 DOI: 10.1002/jmv.23456] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2012] [Indexed: 11/06/2022]
Abstract
Vaccines against two high-risk human papillomavirus (HPV) types, HPV-16, and HPV-18, are in use currently, with high efficacy for preventing infections with these HPV types and consequent cervical cancers. However, circulating HPV types can vary with geography and ethnicity. The aim of this study was to investigate the prevalence of HPV types and the association between HPV types and abnormal cervical cytology among female sex workers in Northern Vietnam. Cervical swabs and plasma samples were collected from 281 female sex workers at two health centers in Hanoi and Hai Phong in 2009. The HPV L1 gene was amplified by PCR using original and modified GP5(+)/6(+) primers. Amplified PCR products were genotyped by the microarray system GeneSquare (KURABO) and/or clonal sequencing. Of the 281 women, 139 (49.5%) were positive for HPV DNA. Among the HPV-positive samples, 339 strains and 29 different types were identified. Multiple-type and high risk-type HPV infections were found in 85 (61.2%) and 124 (89.2%) women, respectively. The most common genotype was HPV-52, followed by HPV-16, HPV-18, and HPV-58. Abnormal cervical cytology was detected in 3.2% (9/281) of the women, and all of these samples were positive for HPV-DNA. Age ≤25 years and infection with human immunodeficiency virus were associated positively with HPV infection among the women while ever smoking was associated negatively. These results show that HPV-52 is most prevalent among female sex workers in Northern Vietnam, most of whom had normal cervical cytology. This information may be important for designing vaccination strategies in Vietnam.
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Affiliation(s)
- Huyen Thi Thanh Hoang
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
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Tran VT, Ishizaki A, Nguyen CH, Hoang HTT, Pham HV, Bi X, Van Pham T, Ichimura H. No increase of drug-resistant HIV type 1 prevalence among drug-naive individuals in Northern Vietnam. AIDS Res Hum Retroviruses 2012; 28:1349-51. [PMID: 22264087 DOI: 10.1089/aid.2012.0006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We reported previously that the prevalence of drug-resistant HIV-1 among antiretroviral therapy (ART)-naive individuals in Northern Vietnam was 2.9% in 2007 and 6.2% in 2008. To investigate the continuing trend of prevalence, we collected plasma samples from 958 individuals in Hai Phong and Hanoi in 2009, extracted viral RNA from HIV-1 antibody-positive samples, and analyzed them genetically. HIV-1 antibody prevalence was 26.8% in injecting drug users (n=302), 13.4% in female sex workers (n=284), 0.5% in blood donors (n=206), and 0.6% in pregnant women (n=166). All HIV-1 strains were CRF01_AE. Nonnucleoside reverse-transcriptase inhibitor resistance mutations were found in two (2.0%) of the 102 successfully analyzed cases (one case with the Y181C and one with the K101E). No nucleoside reverse-transcriptase inhibitor resistance or protease inhibitor resistance mutations were detected. The prevalence of circulating ART-resistant HIV-1 in Northern Vietnam did not increase from 2007 to 2009, although the rate of ART coverage did increase.
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Affiliation(s)
- Vuong Thi Tran
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
- Hai Phong Medical University, Hai Phong, Vietnam
| | - Azumi Ishizaki
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Cuong Hung Nguyen
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
- Hai Phong Medical University, Hai Phong, Vietnam
| | | | - Hung Viet Pham
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | - Xiuqiong Bi
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | | | - Hiroshi Ichimura
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
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Nguyen CH, Ishizaki A, Chung PTT, Hoang HT, Nguyen TV, Tanimoto T, Lihana R, Matsushita K, Bi X, Pham TV, Ichimura H. Prevalence of HBV infection among different HIV-risk groups in Hai Phong, Vietnam. J Med Virol 2011; 83:399-404. [PMID: 21264859 DOI: 10.1002/jmv.21978] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [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: 12/11/2022]
Abstract
Hepatitis B virus (HBV) infection in Hai Phong, northern Vietnam, was characterized by analyzing the prevalence and genotype distribution of HBV as well as co-infection with human immunodeficiency virus type 1 (HIV-1) among five different risk groups for HIV infection. Plasma samples were collected from intravenous drug users (n=760, anti-HIV-1 antibody positive rate: 35.9%), female sex workers (FSWs; n=91, 23.1%), seafarers (n=94, 0%), pregnant women (n=200, 0.5%), and blood donors (n=210, 2.9%) in 2007 [Ishizaki et al. (2009): AIDS Res Hum Retroviruses 25:175-182]. Samples were screened for the hepatitis B surface antigen (HBsAg) and anti-HBs antibody and analyzed genetically. The cumulative HBV incidence rate (HBsAg+anti-HBs) was 53.2% (10.7+42.5%) in intravenous drug users, 51.6% (11.0+40.6%) in FSWs, 54.3% (9.6+44.7%) in seafarers, 50.5% (12.5+38.0%) in pregnant women, and 51.0% (18.1+32.9%) in blood donors; there was no significant difference among these groups. Of 163 HBsAg-positive samples, 113 could be analyzed genetically. Phylogenetic analysis, based on the preS1 region, revealed genotype B4 was most prevalent (90/113; 79.6%), followed by C1 (17.7%), I1 (1.8%), and B2 (0.9%). There was no significant difference in HBV genotype distribution among different HIV infection-risk groups. The prevalence of HBsAg was 10.3% (31/301) in HIV-1-infected individuals and 12.5% (132/1,054) in non-HIV-1-infected individuals, which was not significant. In addition, no significant difference in HBV genotype distribution was observed between HBV/HIV-1 coinfected and HBV mono-infected groups. These results suggest that, although HBV and HIV-1 share modes of transmission, major transmission routes of HBV have been different from those of HIV-1 in Hai Phong, Vietnam.
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Affiliation(s)
- Cuong Hung Nguyen
- Department of Viral Infection and International Health, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
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Van Houdt WJ, Emmink BL, Pham TV, Piersma SR, Verheem A, Vries RG, Fratantoni SA, Pronk A, Clevers H, Borel Rinkes IHM, Jimenez CR, Kranenburg O. Comparative proteomics of colon cancer stem cells and differentiated tumor cells identifies BIRC6 as a potential therapeutic target. Mol Cell Proteomics 2011; 10:M111.011353. [PMID: 21788403 DOI: 10.1074/mcp.m111.011353] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Patients with liver metastases from colon carcinoma show highly variable responses to chemotherapy and tumor recurrence is frequently observed. Therapy-resistant cancer stem cells have been implicated in drug resistance and tumor recurrence. However, the factors determining therapy resistance and tumor recurrence are poorly understood. The aim of this study was to gain insight into these mechanisms by comparing the proteomes of patient-derived cancer stem cell cultures and their differentiated isogenic offspring. We established colonosphere cultures derived from resection specimens of liver metastases in patients with colon cancer. These colonospheres, enriched for colon cancer stem cells, were used to establish isogenic cultures of stably differentiated nontumorigenic progeny. Proteomics based on one-dimensional gel electrophoresis coupled to nano liquid chromatography tandem MS was used to identify proteome differences between three of these paired cultures. The resulting data were analyzed using Ingenuity Pathway Software. Out of a total data set of 3048 identified proteins, 32 proteins were at least twofold up-regulated in the colon cancer stem cells when compared with the differentiated cells. Pathway analysis showed that "cell death " regulation is strikingly different between the two cell types. Interestingly, one of the top-up-regulated proteins was BIRC6, which belongs to the class of Inhibitor of Apoptosis Proteins. Knockdown of BIRC6 sensitized colon cancer stem cells against the chemotherapeutic drugs oxaliplatin and cisplatin. This study reveals that differentiation of colon cancer stem cells is accompanied by altered regulation of cell death pathways. We identified BIRC6 as an important mediator of cancer stem cell resistance against cisplatin and oxaliplatin. Targeting BIRC6, or other Inhibitors of Apoptosis Proteins, may help eradicating colon cancer stem cells.
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Affiliation(s)
- W J Van Houdt
- University Medical Center Utrecht, Department of Surgery, Utrecht, The Netherlands
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17
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Van Houdt WJ, Emmink BL, Pham TV, Piersma SR, Verheem A, Vries RG, Fratantoni SA, Pronk A, Clevers H, Borel Rinkes IHM, Jimenez CR, Kranenburg O. Comparative proteomics of colon cancer stem cells and differentiated tumor cells identifies BIRC6 as a potential therapeutic target. Mol Cell Proteomics 2011. [PMID: 21788403 DOI: 10.1074/mcp.m111.011353-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Patients with liver metastases from colon carcinoma show highly variable responses to chemotherapy and tumor recurrence is frequently observed. Therapy-resistant cancer stem cells have been implicated in drug resistance and tumor recurrence. However, the factors determining therapy resistance and tumor recurrence are poorly understood. The aim of this study was to gain insight into these mechanisms by comparing the proteomes of patient-derived cancer stem cell cultures and their differentiated isogenic offspring. We established colonosphere cultures derived from resection specimens of liver metastases in patients with colon cancer. These colonospheres, enriched for colon cancer stem cells, were used to establish isogenic cultures of stably differentiated nontumorigenic progeny. Proteomics based on one-dimensional gel electrophoresis coupled to nano liquid chromatography tandem MS was used to identify proteome differences between three of these paired cultures. The resulting data were analyzed using Ingenuity Pathway Software. Out of a total data set of 3048 identified proteins, 32 proteins were at least twofold up-regulated in the colon cancer stem cells when compared with the differentiated cells. Pathway analysis showed that "cell death " regulation is strikingly different between the two cell types. Interestingly, one of the top-up-regulated proteins was BIRC6, which belongs to the class of Inhibitor of Apoptosis Proteins. Knockdown of BIRC6 sensitized colon cancer stem cells against the chemotherapeutic drugs oxaliplatin and cisplatin. This study reveals that differentiation of colon cancer stem cells is accompanied by altered regulation of cell death pathways. We identified BIRC6 as an important mediator of cancer stem cell resistance against cisplatin and oxaliplatin. Targeting BIRC6, or other Inhibitors of Apoptosis Proteins, may help eradicating colon cancer stem cells.
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Affiliation(s)
- W J Van Houdt
- University Medical Center Utrecht, Department of Surgery, Utrecht, The Netherlands
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18
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Teunissen CE, Koel-Simmelink MJA, Pham TV, Knol JC, Khalil M, Trentini A, Killestein J, Nielsen J, Vrenken H, Popescu V, Dijkstra CD, Jimenez CR. Identification of biomarkers for diagnosis and progression of MS by MALDI-TOF mass spectrometry. Mult Scler 2011; 17:838-50. [PMID: 21505015 DOI: 10.1177/1352458511399614] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Body fluid biomarkers for clinical subtyping and monitoring of disease progression are of considerable interest in multiple sclerosis (MS). Proteomics tools are optimal for the unbiased simultaneous detection of large series of peptides and proteins. OBJECTIVES To identify novel candidate biomarkers discriminating patients with MS from patients with other neurological diseases (OND), and for subtyping of relapsing-remitting (RR), secondary progressive (SP) and primary progressive (PP) MS patients using a high-throughput MALDI-TOF-based mass spectrometry method. METHODS Paired cerebrospinal fluid (CSF) and serum samples of 41 RRMS, 30 SPMS, 13 PPMS patients and 25 patients with OND were analysed. RESULTS Out of a total of 100 detected peptides in CSF and 200 peptides in serum, 11 peptides were differentially regulated in serum and two in CSF between patients with MS and the OND control group. Eleven peptides were differentially regulated in both serum and CSF between relapse-onset MS and PPMS patients. Lastly, four peptides were differentially regulated in serum and two in CSF between RRMS and SPMS patients. Specific peaks regulated in MS were tentatively identified as fragments of secretogranin III and complement C3. The peak intensity of the CSF peptide ion with m/z value 8607.7 correlated to atrophy (r = -0.27, p < 0.005), black hole volumes (r = 0.31, p < 0.008) and total lesion load (r = 0.34, p < 0.003). A serum peptide with m/z value of 872.4 elevated in SPMS correlated to Expanded Disability Status Scale (r = 0.341, p < 0.005) and atrophy (r = -0.286, p < 0.028). CONCLUSIONS Using high-throughput body fluid profiling by MALDI-TOF mass spectrometry, small proteins and peptides were detected as promising candidate biomarkers for diagnosis and disease progression of MS.
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Affiliation(s)
- C E Teunissen
- NUBIN, Department of Clinical Chemistry, VU University Medical Center, Amsterdam, The Netherlands.
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Pham TV, Sosunov EA, Gainullin RZ, Danilo P, Rosen MR. Impact of sex and gonadal steroids on prolongation of ventricular repolarization and arrhythmias induced by I(K)-blocking drugs. Circulation 2001; 103:2207-12. [PMID: 11331264 DOI: 10.1161/01.cir.103.17.2207] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Mechanisms for longer rate-corrected QT intervals and higher incidences of drug-induced torsade de pointes in women than in men are incompletely defined, although gonadal steroids are assumed to be important determinants of these differences. METHODS AND RESULTS We used microelectrode techniques to study isolated rabbit right ventricular endocardium from control male and female and castrated male (ORCH) and female (OVX) rabbits. Action potential duration to 30% repolarization (APD(30)) was significantly shorter in male than female and in ORCH than OVX at a cycle length of 500 ms. The I(Ks) blocker chromanol 293B had no effect on APD in males or females. The I(Kr) blocker dofetilide prolonged APD in female and ORCH more than in male and OVX. At 10(-)(6) mol/L dofetilide (cycle length=1 second), the incidence of early afterdepolarizations was: female, 67%; ORCH, 56%; male, 40%; and OVX, 28%. Serum 17beta-estradiol levels were unrelated to the effects of dofetilide, but as testosterone levels increased, the dofetilide effect to increase APD diminished, as did early afterdepolarization incidence. CONCLUSIONS Sex-related differences in basal right ventricular endocardial AP configuration persist in castrated rabbits, suggesting that extragonadal factors contribute to the differences in ventricular repolarization. In this model, drugs that block I(Kr) but not I(Ks) prolong repolarization in a way that suggests that protection from excess prolongation in males is attributable to testosterone, whereas the risk of excess prolongation of repolarization in females is related to sex-determined factors in addition to estrogen.
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Affiliation(s)
- T V Pham
- Department of Pharmacology, Center for Molecular Therapeutics, The Partnership for Women's Health, College of Physicians and Surgeons of Columbia University, New York, NY, USA
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Bednáriková A, Pham TV, Lehotay J, Cizmárik J. Study of local anesthetics. Part 113: Correlation between log k', C, pi, P values and anesthesia activity for morpholinoethyl esters of 2-, 3- and 4-alkoxy substituted phenylcarbamic acids. Pharmazie 1993; 48:947-8. [PMID: 8115442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- A Bednáriková
- Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak Technical University, Bratislava
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Abstract
Peritoneal macrophages from CBA/T6 (healer) and BALB/c (non-healer) mice were infected with Leishmania major (LV39) in vitro. The microorganism replicated at the same rate in macrophages from either strain. Exposure of infected cells to lymph node cells (LNC) from infected syngeneic animals led to intracellular killing of the parasite by macrophages from both strains, provided LPS was present in the incubation medium. In vitro-propagated L.major-specific T-cell blasts activated macrophages from either strain in the absence of LPS. On a per cell basis, lymphoid cells from BALB/c mice were less efficient, however, than cells from CBA/T6 mice. Lysis of parasitized macrophages was also more marked in CBA/T6 than in BALB/c cell mixtures. LNC exposed to parasite antigen or to infected macrophages secreted macrophage-activating factor (MAF); incubation with antigen also induced lymphocyte proliferation. MAF production and LNC proliferation decreased with progression of the infection of BALB/c mice, but always remained significant. The reduction in relative T-cell numbers in the lymph nodes of infected animals was moderate; the absolute number of T-cells increased markedly in the lymphoid organs of both strains, however. These results suggest that failure to heal may coexist together with active cell-mediated immune response in non-healer mice.
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Affiliation(s)
- T V Pham
- Institute of Biochemistry, University of Lausanne, Epalinges, Switzerland
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Pham TV, Mauël J. Studies on intracellular killing of Leishmania major and lysis of host macrophages by immune lymphoid cells in vitro. Parasite Immunol 1987; 9:721-36. [PMID: 2448731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Exposure of Leishmania major-infected CBA/T6 mouse macrophages to lymph node cells (LNC) from infected animals led to antigen-specific killing of the micro-organisms. The effect depended on the number of added LNC, the duration of incubation with macrophages, and the presence of LPS in the incubation fluids. Incubation with immune LNC also resulted in lysis of part of the infected cells, however without release of live amastigotes, as parasites were destroyed intracellularly before macrophages were damaged. Supernates from antigen-stimulated LNC cultures activated macrophages for intracellular killing without damage to the host cells, suggesting that macrophage lysis was not a consequence of the activation process. Treatment of effector lymphocytes with anti-L3T4 antibodies abrogated both intracellular killing and macrophage lysis. Parasitized macrophages were also destroyed by alloimmune cytolytic T-lymphocytes; in this case, however, live amastigotes were released, showing that immune lysis of the infected cells would not entail parasite destruction per se. These studies support the hypothesis that recovery from L. major infection relates to the ability of lymphoid cells to generate MAF/IFN in response to parasite antigen and are compatible with the idea that lysis of parasitized macrophages may contribute to immune recovery from the infection.
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Affiliation(s)
- T V Pham
- Institut de Biochimie, Université de Lausanne, Epalinges, Switzerland
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