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Liu WN, Fong SY, Tan WWS, Tan SY, Liu M, Cheng JY, Lim S, Suteja L, Huang EK, Chan JKY, Iyer NG, Yeong JPS, Lim DWT, Chen Q. Establishment and Characterization of Humanized Mouse NPC-PDX Model for Testing Immunotherapy. Cancers (Basel) 2020; 12:cancers12041025. [PMID: 32331230 PMCID: PMC7225949 DOI: 10.3390/cancers12041025] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [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: 03/22/2020] [Revised: 04/13/2020] [Accepted: 04/17/2020] [Indexed: 12/25/2022] Open
Abstract
Immune checkpoint blockade (ICB) monotherapy shows early promise for the treatment of nasopharyngeal carcinoma (NPC) in patients. Nevertheless, limited representative NPC models hamper preclinical studies to evaluate the efficacy of novel ICB and combination regimens. In the present study, we engrafted NPC biopsies in non-obese diabetic-severe combined immunodeficiency interleukin-2 receptor gamma chain-null (NSG) mice and established humanized mouse NPC-patient-derived xenograft (NPC-PDX) model successfully. Epstein–Barr virus was detected in the NPC in both NSG and humanized mice as revealed by Epstein–Barr virus-encoded small RNA (EBER) in situ hybridization (ISH) and immunohistochemical (IHC) staining. In the NPC-bearing humanized mice, the percentage of tumor-infiltrating CD8+ cytotoxic T cells was lowered, and the T cells expressed higher levels of various inhibitory receptors, such as programmed cell death protein 1 (PD-1) and cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) than those in blood. The mice were then treated with nivolumab and ipilimumab, and the anti-tumor efficacy of combination immunotherapy was examined. In line with paired clinical data, the NPC-PDX did not respond to the treatment in terms of tumor burden, whilst an immunomodulatory response was elicited in the humanized mice. From our results, human proinflammatory cytokines, such as interferon-gamma (IFN-γ) and interleukin-6 (IL-6) were significantly upregulated in plasma. After treatment, there was a decrease in CD4/CD8 ratio in the NPC-PDX, which also simulated the modulation of intratumoral CD4/CD8 profile from the corresponding donor. In addition, tumor-infiltrating T cells were re-activated and secreted more IFN-γ towards ex vivo stimulation, suggesting that other factors, including soluble mediators and metabolic milieu in tumor microenvironment may counteract the effect of ICB treatment and contribute to the tumor progression in the mice. Taken together, we have established and characterized a novel humanized mouse NPC-PDX model, which plausibly serves as a robust platform to test for the efficacy of immunotherapy and may predict clinical outcomes in NPC patients.
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Affiliation(s)
- Wai Nam Liu
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Shin Yie Fong
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Wilson Wei Sheng Tan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Sue Yee Tan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Min Liu
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Jia Ying Cheng
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Sherlly Lim
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Lisda Suteja
- Division of Medical Oncology, National Cancer Centre, Singapore 169610, Singapore; (L.S.); (N.G.I.)
| | - Edwin Kunxiang Huang
- Department of Reproductive Medicine, KK Women’s and Children’s Hospital, Singapore 229899, Singapore; (E.K.H.); (J.K.Y.C.)
| | - Jerry Kok Yen Chan
- Department of Reproductive Medicine, KK Women’s and Children’s Hospital, Singapore 229899, Singapore; (E.K.H.); (J.K.Y.C.)
- Experimental Fetal Medicine Group, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
| | | | - Joe Poh Sheng Yeong
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
| | - Darren Wan-Teck Lim
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
- Division of Medical Oncology, National Cancer Centre, Singapore 169610, Singapore; (L.S.); (N.G.I.)
- Correspondence: (D.W.-T.L.); (Q.C.); Tel.: +65-6586-9873 (Q.C.)
| | - Qingfeng Chen
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore 138673, Singapore; (W.N.L.); (S.Y.F.); (W.W.S.T.); (S.Y.T.); (M.L.); (J.Y.C.); (S.L.); (J.P.S.Y.)
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
- Correspondence: (D.W.-T.L.); (Q.C.); Tel.: +65-6586-9873 (Q.C.)
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Mencarelli A, Gunawan M, Yong KSM, Bist P, Tan WWS, Tan SY, Liu M, Huang EK, Fan Y, Chan JKY, Choi HW, Abraham SN, Chen Q. A humanized mouse model to study mast cells mediated cutaneous adverse drug reactions. J Leukoc Biol 2020; 107:797-807. [PMID: 31922289 PMCID: PMC7322799 DOI: 10.1002/jlb.3ma1219-210rr] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 12/13/2022] Open
Abstract
Recently a G‐protein‐coupled receptor, MAS Related GPR Family Member X2 (MRGPRX2), was identified as a specific receptor on human mast cells responsible for IgE independent adverse drug reactions (ADR). Although a murine homologue, Mrgprb2, has been identified for this receptor, its affinity for many ADR‐causing drugs is poor making it difficult to undertake in vivo studies to examine mechanisms of ADR and to develop therapeutic strategies. Here, we have created humanized mice capable of generating MRGPRX2‐expressing human MCs allowing for the study of MRGPRX2 MCs‐mediated ADR in vitro as well as in vivo. Humanized mice were generated by hydrodynamic‐injection of plasmids expressing human GM‐CSF and IL‐3 into NOD‐scid IL2R‐γ−/− strain of mice that had been transplanted with human hematopoietic stem cells. These GM/IL‐3 humice expressed high numbers of tissue human MCs but the MRGPRX2 receptor expressed in MCs were limited to few body sites including the skin. Importantly, large numbers of MRGPRX2‐expressing human MCs could be cultured from the bone marrow of GM/IL‐3 humice revealing these mice to be an important source of human MCs for in vitro studies of MRGPRX2‐related MCs activities. When GM/IL‐3 humice were exposed to known ADR causing contrast agents (meglumine and gadobutrol), the humice were found to experience anaphylaxis analogous to the clinical situation. Thus, GM/IL‐3 humice represent a valuable model for investigating in vivo interactions of ADR‐causing drugs and human MCs and their sequelae, and these mice are also a source of human MRGPRX2‐expressing MCs for in vitro studies.
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Affiliation(s)
- Andrea Mencarelli
- Program in Emerging Infectious Diseases, Duke - National University of Singapore Graduate Medical School, Singapore
| | - Merry Gunawan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - Kylie Su Mei Yong
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - Pradeep Bist
- Program in Emerging Infectious Diseases, Duke - National University of Singapore Graduate Medical School, Singapore
| | - Wilson Wei Sheng Tan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - Sue Yee Tan
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - Min Liu
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore
| | - Edwin Kunxiang Huang
- Experimental Fetal Medicine Group, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Yong Fan
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jerry Kok Yen Chan
- Experimental Fetal Medicine Group, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Department of Reproductive Medicine, KK Women's and Children's Hospital, Singapore
| | - Hae Woong Choi
- Department of Life Sciences, Korea University, Seoul, South Korea
| | - Soman N Abraham
- Program in Emerging Infectious Diseases, Duke - National University of Singapore Graduate Medical School, Singapore.,Department of Pathology, Duke University Medical Center, Durham, North Carolina, USA.,Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA.,Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Qingfeng Chen
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore.,Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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Christiansen DL, Huang EK, Silver FH. Assembly of type I collagen: fusion of fibril subunits and the influence of fibril diameter on mechanical properties. Matrix Biol 2000; 19:409-20. [PMID: 10980417 DOI: 10.1016/s0945-053x(00)00089-5] [Citation(s) in RCA: 196] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Structural stability of the extracellular matrix is primarily a consequence of fibrillar collagen and the extent of cross-linking. The relationship between collagen self-assembly, consequent fibrillar shape and mechanical properties remains unclear. Our laboratory developed a model system for the preparation of self-assembled type I collagen fibers with fibrillar substructure mimicking the hierarchical structures of tendon. The present study evaluates the effects of pH and temperature during self-assembly on fibrillar structure, and relates the structural effects of these treatments on the uniaxial tensile mechanical properties of self-assembled collagen fibers. Results of the analysis of fibril diameter distributions and mechanical properties of the fibers formed under the different incubation conditions indicate that fibril diameters grow via the lateral fusion of discrete approximately 4 nm subunits, and that fibril diameter correlates positively with the low strain modulus. Fibril diameter did not correlate with either the ultimate tensile strength or the high strain elastic modulus, which suggests that lateral aggregation and consequently fibril diameter influences mechanical properties during small strain mechanical deformation. We hypothesize that self-assembly is mediated by the formation of fibrillar subunits that laterally and linearly fuse resulting in fibrillar growth. Lateral fusion appears important in generating resistance to deformation at low strain, while linear fusion leading to longer fibrils appears important in the ultimate mechanical properties at high strain.
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Affiliation(s)
- D L Christiansen
- Division of Biomaterials, Department of Pathology and Laboratory Medicine, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, 675 Hoes Lane, Piscataway, NJ 08854-5635, USA
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Langou RA, Huang EK, Kelley MJ, Cohen LS. Predictive accuracy of coronary artery calcification and abnormal exercise test for coronary artery disease in asymptomatic men. Circulation 1980; 62:1196-203. [PMID: 7438355 DOI: 10.1161/01.cir.62.6.1196] [Citation(s) in RCA: 93] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
To determine the predictive accuracy of fluoroscopically detected coronary artery calcification (CAC) and a positive submaximal exercise test, 129 asymptomatic men were screened; 13 had both coronary artery calcification and positive exercise test (greater than or equal to 1.0 mm ST-segment depression). These 13 men were studied at coronary arteriography. They had a mean age of 44 years (range 41-56 years); none had history or symptoms of heat disease and all had normal resting ECGs at entry. CAC was detected in one artery in 10 men, in two arteries in two men, and in three arteries in one man. Coronary artery disease (CAD) was considered clinically significant if any major coronary branch was narrowed > 50%. Coronary arteriography revealed 12 men with clinically significant CAD (one-vessel CAD in four, two-vessel CAD in five and three-vessel CAD in three men) and one man with minor one-vessel CAD. The predictive accuracy was 100% for minor CAD and 92% for clinically significant CAD. The location of CAC and CAD correlated, but the absence of CAC did not rule out the presence of CAD at coronary arteriography. Furthermore, CAC did not indicate the location of the highest stenotic (most occlusive) lesions seen at arteriography. Follow-up for the 13 patients was 36 months; three patients developed typical angina and one patient developed a transmural myocardial infarction. This study suggests that the predictive accuracy of CAC and a positive exercise test in the middle-aged non-hyperlipidemic asymptomatic male is very high (100% for CAD and 92% for clinically significant CAD) and that CAC and a positive exercise test predict an early appearance of angina or myocardial infarction in previously asymptomatic men.
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Kelley MJ, Huang EK, Langou RA. Correlation of fluoroscopically detected coronary artery calcification with exercise stress testing in asymptomatic men. Radiology 1978; 129:1-6. [PMID: 693855 DOI: 10.1148/129.1.1] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cardiac fluoroscopy followed by a submaximal exercise electrocardiogram was used to evaluate 129 healthy men (average age 49 p 6) for assessment of possible latent ischemic heart disease in an asymptomatic population. Of 108 subjects who completed the exercise protocol, 37 (34%) had at least one fluoroscopically detected calcified coronary artery. Of the 16 subjects with a positive exercise stress test, 13 (81%) had calcification of at least one coronary artery, Thirteen of 37 (35%) with calcification had a positive exercise test. Those with calcification of at least one coronary artery had a ninefold increased risk of a positive exercise stress test (p less than 0.0001). The location of a calcific deposit conferred greater risk of exercise-induced ischemic changes than did multivessel involvement. Forty-seven per cent of men with calcification in the left anterior descending coronary artery had an abnormal exercise electrocardiogram vs. 33% and 16% of persons with left circumflex and right coronary artery calcifications, respectively.
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