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Xue B, Wang P, Yu W, Feng J, Li J, Zhao R, Yang Z, Yan X, Duan H. CD146 as a promising therapeutic target for retinal and choroidal neovascularization diseases. SCIENCE CHINA. LIFE SCIENCES 2022; 65:1157-1170. [PMID: 34729700 DOI: 10.1007/s11427-021-2020-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/20/2021] [Indexed: 11/26/2022]
Abstract
Blood vessel dysfunction causes several retinal diseases, including diabetic retinopathy, familial exudative vitreoretinopathy, macular degeneration and choroidal neovascularization in pathological myopia. Vascular endothelial growth factor (VEGF)-neutralizing proteins provide benefits in most of those diseases, yet unsolved haemorrhage and frequent intraocular injections still bothered patients. Here, we identified endothelial CD146 as a new target for retinal diseases. CD146 expression was activated in two ocular pathological angiogenesis models, a laser-induced choroid neovascularization model and an oxygen-induced retinopathy model. The absence of CD146 impaired hypoxia-induced cell migration and angiogenesis both in cell lines and animal model. Preventive or therapeutic treatment with anti-CD146 antibody AA98 significantly inhibited hypoxia-induced aberrant retinal angiogenesis in two retinal disease models. Mechanistically, under hypoxia condition, CD146 was involved in the activation of NFκB, Erk and Akt signalling pathways, which are partially independent of VEGF. Consistently, anti-CD146 therapy combined with anti-VEGF therapy showed enhanced impairment effect of hypoxia-induced angiogenesis in vitro and in vivo. Given the critical role of abnormal angiogenesis in retinal and choroidal diseases, our results provide novel insights into combinatorial therapy for neovascular fundus diseases.
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Affiliation(s)
- Bai Xue
- Sichuan Provincial Key Laboratory for Human Disease Gene Study, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Ping Wang
- Key Laboratory of Protein and Peptide Pharmaceutical, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Wenzhen Yu
- Department of Ophthalmology, People's Hospital, Peking University, Beijing, 100044, China
| | - Jing Feng
- Key Laboratory of Protein and Peptide Pharmaceutical, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jie Li
- Department of Ophthalmology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China
| | - Rulian Zhao
- Sichuan Provincial Key Laboratory for Human Disease Gene Study, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Zhenglin Yang
- Sichuan Provincial Key Laboratory for Human Disease Gene Study, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, China.
- Research Unit for Blindness Prevention of Chinese Academy of Medical Sciences (2019RU026), Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, 610072, China.
| | - Xiyun Yan
- Key Laboratory of Protein and Peptide Pharmaceutical, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
- Nanozyme Medical Center, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, 450001, China.
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Hongxia Duan
- Key Laboratory of Protein and Peptide Pharmaceutical, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
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Chen X, Yan H, Liu D, Xu Q, Duan H, Feng J, Yan X, Xie C. Structure basis for AA98 inhibition on the activation of endothelial cells mediated by CD146. iScience 2021; 24:102417. [PMID: 33997697 PMCID: PMC8093899 DOI: 10.1016/j.isci.2021.102417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 02/10/2021] [Accepted: 04/08/2021] [Indexed: 12/27/2022] Open
Abstract
CD146 is an adhesion molecule that plays important roles in angiogenesis, cancer metastasis, and immune response. It exists as a monomer or dimer on the cell surface. AA98 is a monoclonal antibody that binds to CD146, which abrogates the activation of CD146-mediated signaling pathways and shows inhibitory effects on tumor growth. However, how AA98 inhibits the function of CD146 remains unclear. Here, we describe a crystal structure of the CD146/AA98 Fab complex at a resolution of 2.8 Å. Monomeric CD146 is stabilized by AA98 Fab binding to the junction region of CD146 domains 4 and 5. A higher-affinity AA98 variant (here named HA98) was thus rationally designed. Better binding to CD146 and prominent inhibition on cell migration were achieved with HA98. Further experiments on xenografted melanoma in mice with HA98 revealed superior inhibitory effects on tumor growth to those of AA98, which suggested future applications of this antibody in cancer therapy. Structural analysis elucidated how mAb AA98 inhibited CD146-mediated EC activation AA98-stabilized CD146 in monomer thus inhibited activation of EC Higher affinity monoclonal antibody HA98 was rationally designed for cancer treatment
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Affiliation(s)
- Xuehui Chen
- Key Laboratory of Protein and Peptide Pharmaceuticals, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.,State Key Laboratory of Membrane Biology, Laboratory of Molecular Biophysics, School of Life Sciences, Peking University, Beijing 100871, China
| | - Huiwen Yan
- Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Dan Liu
- Key Laboratory of Protein and Peptide Pharmaceuticals, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Qingji Xu
- Key Laboratory of Protein and Peptide Pharmaceuticals, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongxia Duan
- Key Laboratory of Protein and Peptide Pharmaceuticals, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Jing Feng
- Key Laboratory of Protein and Peptide Pharmaceuticals, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Xiyun Yan
- Key Laboratory of Protein and Peptide Pharmaceuticals, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Can Xie
- State Key Laboratory of Membrane Biology, Laboratory of Molecular Biophysics, School of Life Sciences, Peking University, Beijing 100871, China.,High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Science Island, Hefei, Anhui 230031, PR China.,International Magnetobiology Frontier Research Center, Science Island, Hefei 230031, China
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Zhang L, Cen Y, Huang Q, Li H, Mo X, Meng W, Chen J. Computational flow cytometric analysis to detect epidermal subpopulations in human skin. Biomed Eng Online 2021; 20:22. [PMID: 33596908 PMCID: PMC7891025 DOI: 10.1186/s12938-021-00858-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 02/05/2021] [Indexed: 02/08/2023] Open
Abstract
Background The detection and dissection of epidermal subgroups could lead to an improved understanding of skin homeostasis and wound healing. Flow cytometric analysis provides an effective method to detect the surface markers of epidermal cells while producing high-dimensional data files. Methods A 9-color flow cytometric panel was optimized to reveal the heterogeneous subgroups in the epidermis of human skin. The subsets of epidermal cells were characterized using automated methods based on dimensional reduction approaches (viSNE) and clustering with Spanning-tree Progression Analysis of Density-normalized Events (SPADE). Results The manual analysis revealed differences in epidermal distribution between body sites based on a series biaxial gating starting with the expression of CD49f and CD29. The computational analysis divided the whole epidermal cell population into 25 clusters according to the surface marker phenotype with SPADE. This automatic analysis delineated the differences between body sites. The consistency of the results was confirmed with PhenoGraph. Conclusion A multicolor flow cytometry panel with a streamlined computational analysis pipeline is a feasible approach to delineate the heterogeneity of the epidermis in human skin.
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Affiliation(s)
- Lidan Zhang
- Department of Burn and Plastic Surgery, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Ying Cen
- Department of Burn and Plastic Surgery, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Qiaorong Huang
- Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Huifang Li
- Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Xianming Mo
- Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Wentong Meng
- Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
| | - Junjie Chen
- Department of Burn and Plastic Surgery, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
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Franco LAM, Moreira CHV, Buss LF, Oliveira LC, Martins RCR, Manuli ER, Lindoso JAL, Busch MP, Pereira AC, Sabino EC. Pharmacogenomic Profile and Adverse Drug Reactions in a Prospective Therapeutic Cohort of Chagas Disease Patients Treated with Benznidazole. Int J Mol Sci 2021; 22:ijms22041960. [PMID: 33669428 PMCID: PMC7920452 DOI: 10.3390/ijms22041960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/17/2020] [Accepted: 12/28/2020] [Indexed: 11/16/2022] Open
Abstract
Chagas disease remains a major social and public health problem in Latin America. Benznidazole (BZN) is the main drug with activity against Trypanosoma cruzi. Due to the high number of adverse drug reactions (ADRs), BZN is underprescribed. The goal of this study was to evaluate the genetic and transcriptional basis of BZN adverse reactions. Methods: A prospective cohort with 102 Chagas disease patients who underwent BZN treatment was established to identify ADRs and understand their genetic basis. The patients were classified into two groups: those with at least one ADR (n = 73), and those without ADRs (n = 29). Genomic analyses were performed comparing single nucleotide polymorphisms between groups. Transcriptome data were obtained comparing groups before and after treatment, and signaling pathways related to the main ADRs were evaluated. Results: A total of 73 subjects (71.5%) experienced ADRs. Dermatological symptoms were most frequent (45.1%). One region of chromosome 16, at the gene LOC102724084 (rs1518601, rs11861761, and rs34091595), was associated with ADRs (p = 5.652 × 10−8). Transcriptomic data revealed three significantly enriched signaling pathways related to BZN ADRs. Conclusions: These data suggest that part of adverse BZN reactions might be genetically determined and may facilitate patient risk stratification prior to starting BZN treatment.
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Affiliation(s)
- Lucas A. M. Franco
- Department of Infectious Disease and Institute of Tropical Medicine (IMT-SP), University of São Paulo, Av. Dr. Enéas Carvalho de Aguiar, 470, São Paulo 05403-000, Brazil; (L.F.B.); (L.C.O.); (R.C.R.M.); (E.R.M.); (E.C.S.)
- Correspondence: (L.A.M.F.); (C.H.V.M.); Tel.: +55-11-3061-7042 (L.A.M.F. & C.H.V.M.)
| | - Carlos H. V. Moreira
- Department of Infectious Disease and Institute of Tropical Medicine (IMT-SP), University of São Paulo, Av. Dr. Enéas Carvalho de Aguiar, 470, São Paulo 05403-000, Brazil; (L.F.B.); (L.C.O.); (R.C.R.M.); (E.R.M.); (E.C.S.)
- Institute of Infectology Emílio Ribas, São Paulo 01246-900, Brazil;
- Correspondence: (L.A.M.F.); (C.H.V.M.); Tel.: +55-11-3061-7042 (L.A.M.F. & C.H.V.M.)
| | - Lewis F. Buss
- Department of Infectious Disease and Institute of Tropical Medicine (IMT-SP), University of São Paulo, Av. Dr. Enéas Carvalho de Aguiar, 470, São Paulo 05403-000, Brazil; (L.F.B.); (L.C.O.); (R.C.R.M.); (E.R.M.); (E.C.S.)
| | - Lea C. Oliveira
- Department of Infectious Disease and Institute of Tropical Medicine (IMT-SP), University of São Paulo, Av. Dr. Enéas Carvalho de Aguiar, 470, São Paulo 05403-000, Brazil; (L.F.B.); (L.C.O.); (R.C.R.M.); (E.R.M.); (E.C.S.)
| | - Roberta C. R. Martins
- Department of Infectious Disease and Institute of Tropical Medicine (IMT-SP), University of São Paulo, Av. Dr. Enéas Carvalho de Aguiar, 470, São Paulo 05403-000, Brazil; (L.F.B.); (L.C.O.); (R.C.R.M.); (E.R.M.); (E.C.S.)
| | - Erika R. Manuli
- Department of Infectious Disease and Institute of Tropical Medicine (IMT-SP), University of São Paulo, Av. Dr. Enéas Carvalho de Aguiar, 470, São Paulo 05403-000, Brazil; (L.F.B.); (L.C.O.); (R.C.R.M.); (E.R.M.); (E.C.S.)
| | | | - Michael P. Busch
- Blood Systems Research Institute, San Francisco, CA 94118, USA;
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA 94143, USA
| | - Alexandre C. Pereira
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA;
- Laboratory of Genetics and Molecular Cardiology, The Heart Institute, University of São Paulo, São Paulo 05403-000, Brazil
| | - Ester C. Sabino
- Department of Infectious Disease and Institute of Tropical Medicine (IMT-SP), University of São Paulo, Av. Dr. Enéas Carvalho de Aguiar, 470, São Paulo 05403-000, Brazil; (L.F.B.); (L.C.O.); (R.C.R.M.); (E.R.M.); (E.C.S.)
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Therapeutic and Diagnostic Antibodies to CD146: Thirty Years of Research on Its Potential for Detection and Treatment of Tumors. Antibodies (Basel) 2017; 6:antib6040017. [PMID: 31548532 PMCID: PMC6698816 DOI: 10.3390/antib6040017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 10/26/2017] [Accepted: 11/01/2017] [Indexed: 12/17/2022] Open
Abstract
CD146 (MCAM, MUC18, S-Endo1) is a transmembrane glycoprotein belonging to both CAM and mucin families. It exists as different splice variants and is cleaved from the membrane by metalloproteases to generate a soluble form. CD146 is expressed by numerous cancer cells as well as being one of the numerous proteins expressed by the vascular endothelium. It has also been identified on smooth muscle cells, pericytes, and some immune cells. This protein was initially described as an actor involved in tumor growth and metastatic dissemination processes. Some recent works highlighted the role of CD146 in angiogenesis. Interestingly, this knowledge allowed the development of therapeutic and diagnostic tools specifically targeting the different CD146 variants. The first anti-CD146 antibody designed to study the function of this molecule, MUC18, was described by the Pr. J.P. Jonhson in 1987. In this review, we will discuss the 30 following years of research focused on the detection, study, and blocking of this protein in physiological and pathological processes.
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Gbormittah FO, Lee LY, Taylor K, Hancock WS, Iliopoulos O. Comparative studies of the proteome, glycoproteome, and N-glycome of clear cell renal cell carcinoma plasma before and after curative nephrectomy. J Proteome Res 2014; 13:4889-900. [PMID: 25184692 PMCID: PMC4227548 DOI: 10.1021/pr500591e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
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Clear cell renal cell carcinoma
is the most prevalent of all reported kidney cancer cases, and currently
there are no markers for early diagnosis. This has stimulated great
research interest recently because early detection of the disease
can significantly improve the low survival rate. Combining the proteome,
glycoproteome, and N-glycome data from clear cell renal cell carcinoma
plasma has the potential of identifying candidate markers for early
diagnosis and prognosis and/or to monitor disease recurrence. Here,
we report on the utilization of a multi-dimensional fractionation
approach (12P-M-LAC) and LC–MS/MS to comprehensively investigate
clear cell renal cell carcinoma plasma collected before (disease)
and after (non-disease) curative nephrectomy (n =
40). Proteins detected in the subproteomes were investigated via label-free
quantification. Protein abundance analysis revealed a number of low-level
proteins with significant differential expression levels in disease
samples, including HSPG2, CD146, ECM1, SELL, SYNE1, and VCAM1. Importantly,
we observed a strong correlation between differentially expressed
proteins and clinical status of the patient. Investigation of the
glycoproteome returned 13 candidate glycoproteins with significant
differential M-LAC column binding. Qualitative analysis indicated
that 62% of selected candidate glycoproteins showed higher levels
(upregulation) in M-LAC bound fraction of disease samples. This observation
was further confirmed by released N-glycans data in which 53% of identified
N-glycans were present at different levels in plasma in the disease
vs non-disease samples. This striking result demonstrates the potential
for significant protein glycosylation alterations in clear cell renal
cell carcinoma cancer plasma. With future validation in a larger cohort,
information derived from this study may lead to the development of
clear cell renal cell carcinoma candidate biomarkers.
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Affiliation(s)
- Francisca O Gbormittah
- Barnett Institute and Department of Chemistry and Chemical Biology, Northeastern University , 360 Huntington Avenue, Boston, Massachusetts 02115, United States
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CD146, a multi-functional molecule beyond adhesion. Cancer Lett 2012; 330:150-62. [PMID: 23266426 DOI: 10.1016/j.canlet.2012.11.049] [Citation(s) in RCA: 196] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 11/13/2012] [Accepted: 11/28/2012] [Indexed: 02/08/2023]
Abstract
CD146 is a cell adhesion molecule (CAM) that is primarily expressed at the intercellular junction of endothelial cells. CD146 was originally identified as a tumor marker for melanoma (MCAM) due to its existence only in melanoma but not in the corresponding normal counterpart. However CD146 is not just a CAM for the inter-cellular and cell-matrix adhesion. Recent evidence indicates that CD146 is actively involved in miscellaneous processes, such as development, signaling transduction, cell migration, mesenchymal stem cells differentiation, angiogenesis and immune response. CD146 has increasingly become an important molecule, especially identified as a novel bio-marker for angiogenesis and for cancer. Here we have reviewed the dynamic research of CD146, particularly newly identified functions and the underlying mechanisms of CD146.
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Pathak AP, Hochfeld WE, Goodman SL, Pepper MS. Circulating and imaging markers for angiogenesis. Angiogenesis 2008; 11:321-35. [PMID: 18925424 DOI: 10.1007/s10456-008-9119-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Accepted: 09/30/2008] [Indexed: 12/25/2022]
Abstract
Abundant preclinical and indirect clinical data have for several decades convincingly supported the notion that anti-angiogenesis is an effective strategy for the inhibition of tumor growth. The recent success achieved in patients with metastatic colon carcinoma using a neutralizing antibody directed against vascular endothelial growth factor (VEGF) has translated preclinical optimism into a clinical reality.With this transformation in the field of angiogenesis has come a need for reliable surrogate markers. A surrogate marker by definition serves as a substitute for the underlying process in question, and in the case of angiogenesis, microvessel density (usually in so-called "hot-spots") has until now been the most widely used parameter. However, this parameter is more akin to a static "snap-shot" and does not lend itself either to the dynamic in situ assessment of the status of the tumor microvasculature or to the molecular factors that regulate its growth and involution. This has led to an acute need for developing circulating and imaging markers of angiogenesis that can be monitored in vivo at repeated intervals in large number of patients with a variety of tumors in a non-invasive manner. Such markers of angiogenesis are the subject of this review.
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Affiliation(s)
- Arvind P Pathak
- JHU ICMIC Program, The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Kool J, Reubsaet L, Wesseldijk F, Maravilha RT, Pinkse MW, D'Santos CS, van Hilten JJ, Zijlstra FJ, Heck AJR. Suction blister fluid as potential body fluid for biomarker proteins. Proteomics 2007; 7:3638-50. [PMID: 17890648 DOI: 10.1002/pmic.200600938] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Early diagnosis is important for effective disease management. Measurement of biomarkers present at the local level of the skin could be advantageous in facilitating the diagnostic process. The analysis of the proteome of suction blister fluid, representative for the interstitial fluid of the skin, is therefore a desirable first step in the search for potential biomarkers involved in biological pathways of particular diseases. Here, we describe a global analysis of the suction blister fluid proteome as potential body fluid for biomarker proteins. The suction blister fluid proteome was compared with a serum proteome analyzed using identical protocols. By using stringent criteria allowing less than 1% false positive identifications, we were able to detect, using identical experimental conditions and amount of starting material, 401 proteins in suction blister fluid and 240 proteins in serum. As a major result of our analysis we construct a prejudiced list of 34 proteins, relatively highly and uniquely detected in suction blister fluid as compared to serum, with established and putative characteristics as biomarkers. We conclude that suction blister fluid might potentially serve as a good alternative biomarker body fluid for diseases that involve the skin.
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Affiliation(s)
- Jeroen Kool
- Department of Biomolecular Mass Spectrometry, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
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Duda DG, Cohen KS, di Tomaso E, Au P, Klein RJ, Scadden DT, Willett CG, Jain RK. Differential CD146 expression on circulating versus tissue endothelial cells in rectal cancer patients: implications for circulating endothelial and progenitor cells as biomarkers for antiangiogenic therapy. J Clin Oncol 2006; 24:1449-53. [PMID: 16549839 PMCID: PMC2718681 DOI: 10.1200/jco.2005.04.2861] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
PURPOSE Circulating endothelial cells (CECs) and progenitor cells are currently evaluated as potential biomarkers of antiangiogenic therapy. CD146 is considered a panendothelial-specific marker, but its utility as a CEC marker in cancer patients remains unclear. PATIENTS AND METHODS We analyzed the expression of CD146 on mononuclear blood cells, primary tissue endothelial cells, and malignant and normal tissues by flow cytometric and immunohistochemical analyses. Furthermore, we measured the circulation kinetics of CD146+ cells before, and then 3 and 12 days after vascular endothelial growth factor (VEGF) antibody blockade by bevacizumab infusion in rectal cancer patients enrolled in a phase I trial. RESULTS In the peripheral blood of these cancer patients, over 90% of the CD146+ cells were CD45+ hematopoietic cells. CD146 expression was primarily detected on a subset of CD3+CD4+ lymphocytes, and was undetectable on CD34+CD133+CD45(dim) progenitor cells or CD31(bright)CD45- viable CECs. In contradistinction, CD146 was detectable in tissues on both cellular components of tumor vessel wall: CD31(bright)CD45- endothelial cells and alpha-SMA+ pericytes. Unlike viable CECs and progenitor cells, CD146+ cell concentration in the peripheral blood of cancer patients did not decrease during VEGF blockade. CONCLUSION CD146 is fairly homogeneously expressed on vascular endothelium but not on viable CECs or progenitor cells. The vast majority of CD146+ blood cells are lymphocytes, and VEGF blockade by bevacizumab did not significantly change their number in rectal cancer patients. These results underscore the need for further characterization and identification of new markers for CEC subpopulations for their development as biomarkers of antiangiogenic therapy.
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Affiliation(s)
- Dan G Duda
- Steele Laboratory for Tumor Biology, Department of Radiation Oncology and Center for Regenerative Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
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