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Lieping Chen

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https://www.readbyqxmd.com/read/28729608/programmed-death-one-homolog-maintains-the-pool-size-of-regulatory-t-cells-by-promoting-their-differentiation-and-stability
#1
Qi Wang, Jianwei He, Dallas B Flies, Liqun Luo, Lieping Chen
Programmed death one homolog (PD-1H) is an immunoglobulin superfamily molecule and primarily acts as a coinhibitor in the initiation of T cell response to antigens. Here, we report that genetic ablation of PD-1H in mice blocks the differentiation of naive T cells to Foxp3(+) inducible Treg cells (iTreg) with a significant decrease of iTreg in lymphoid organs. This effect of PD-1H is highly specific for iTreg because both naturally generated iTreg in gut-related tissues and in vitro induced iTreg by TGF-β were decreased whereas the genesis of natural Treg (nTreg) remains normal...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28479601/b7-dc-pd-l2-costimulation-of-cd4-t-helper-1-response-via-rgmb
#2
Xinxin Nie, Wenni Chen, Ying Zhu, Baozhu Huang, Weiwei Yu, Zhanshuai Wu, Sizheng Guo, Yiping Zhu, Liqun Luo, Shengdian Wang, Lieping Chen
The role of B7-DC in T-cell responses remains controversial because both coinhibitory and costimulatory functions have been reported in various experimental systems in vitro and in vivo. In addition to interacting with the coinhibitory receptor PD-1, B7-DC has also been shown to bind repulsive guidance molecule b (RGMb). The functional consequences of the B7-DC/RGMb interaction, however, remain unclear. More than a decade ago, we reported that replacement of a murine B7-DC mutant lysine with serine (K113S) at positive 113 resulted in a loss of binding capacity to PD-1...
May 8, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28479600/a-crucial-role-of-the-pd-1h-coinhibitory-receptor-in-suppressing-experimental-asthma
#3
Huafeng Liu, Xin Li, Li Hu, Min Zhu, Bailin He, Liqun Luo, Lieping Chen
Programmed death one homolog (PD-1H) is a cell surface molecule of the B7/CD28 immune modulatory gene family. Although PD-1H has been shown to function as a coinhibitory receptor on T cells to limit naive T-cell activation and proliferation, its role in the regulation of the T-cell response to allergens is unknown. We report here that genetic ablation or blockade of PD-1H drastically promotes pulmonary inflammation with massive accumulation of eosinophils in a mouse model of experimental asthma, indicating a suppressive function of PD-1H in allergic inflammation...
May 8, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28278724/snx2-abl1-positive-acute-lymphoblastic-leukemia-possibly-has-a-poor-prognosis
#4
Qitian Mu, Lieping Guo, Yongxian Hu, Lixia Sheng, Yi Zhang, Ningning Wu, Ying Chen, Cong Shi, Songqiu Shi, Ying Wu, Guifang Ouyang
No abstract text is available yet for this article.
September 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28223273/pd-l1-studies-across-tumor-types-its-differential-expression-and-predictive-value-in-patients-treated-with-immune-checkpoint-inhibitors
#5
Harriet M Kluger, Christopher R Zito, Gabriela Turcu, Marina Baine, Hongyi Zhang, Adebowale Adeniran, Mario Sznol, David L Rimm, Yuval Kluger, Lieping Chen, Justine V Cohen, Lucia B Jilaveanu
PURPOSE: With recent approval of inhibitors of PD-1 in melanoma, non-small cell lung cancer (NSCLC) and renal cell carcinoma (RCC), extensive efforts are underway to develop biomarkers predictive of response. PD-L1 expression has been most widely studied, and is more predictive in NSCLC than RCC or melanoma. We therefore studied differences in expression patterns across tumor types. EXPERIMENTAL DESIGN: We employed tissue microarrays with tumors from NSCLC, RCC or melanoma and a panel of cell lines to study differences between tumor types...
February 21, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28203711/genome-wide-characterization-of-lncrnas-in-acute-myeloid-leukemia
#6
Lijun Lei, Siyu Xia, Dan Liu, Xiaoqing Li, Jing Feng, Yaqi Zhu, Jun Hu, Linjian Xia, Lieping Guo, Fei Chen, Hui Cheng, Ke Chen, Hanyang Hu, Xiaohua Chen, Feng Li, Shan Zhong, Nupur Mittal, Guohua Yang, Zhijian Qian, Leng Han, Chunjiang He
No abstract text is available yet for this article.
February 15, 2017: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/28122590/pd-1-pd-l1-b7-h1-and-tumor-site-immune-modulation-therapy-the-historical-perspective
#7
REVIEW
Jun Wang, Ruirong Yuan, Wenru Song, Jingwei Sun, Delong Liu, Zihai Li
The current success of targeted inhibition against cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) and Programmed Death 1/Programmed Death Ligand 1 (PD-1/PD-L1, herein collectively referred to as PD) pathways is hailed as a cancer immunotherapy breakthrough. PD-L1, known also as B7 homolog 1 (B7-H1), was initially discovered by Dr. Lieping Chen in 1999. To recognize the seminal contributions by Chen to the development of PD-directed therapy against cancer, the Chinese American Hematologist and Oncologist Network (CAHON) decided to honor him with its inaugural Lifetime Achievement Award in Hematology and Oncology at the CAHON's 2015 annual meeting...
January 25, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/27490017/classification-of-advanced-human-cancers-based-on-tumor-immunity-in-the-microenvironment-time-for-cancer-immunotherapy
#8
Yu Zhang, Lieping Chen
No abstract text is available yet for this article.
November 1, 2016: JAMA Oncology
https://www.readbyqxmd.com/read/27440266/differential-expression-and-significance-of-pd-l1-ido-1-and-b7-h4-in-human-lung-cancer
#9
Kurt A Schalper, Daniel Carvajal-Hausdorf, Joseph McLaughlin, Mehmet Altan, Vamsidhar Velcheti, Patricia Gaule, Miguel F Sanmamed, Lieping Chen, Roy S Herbst, David L Rimm
PURPOSE: To determine the expression level, associations, and biological role of PD-L1, IDO-1, and B7-H4 in non-small cell lung cancer (NSCLC). EXPERIMENTAL DESIGN: Using multiplexed quantitative immunofluorescence (QIF), we measured the levels of PD-L1, IDO-1, B7-H4, and different tumor-infiltrating lymphoycte (TIL) subsets in 552 stages I-IV lung carcinomas from two independent populations. Associations between the marker levels, TILs, and major clinicopathologic variables were determined...
July 20, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27152329/neuron-specific-salm5-limits-inflammation-in-the-cns-via-its-interaction-with-hvem
#10
Yuwen Zhu, Sheng Yao, Mathew M Augustine, Haiying Xu, Jun Wang, Jingwei Sun, Megan Broadwater, William Ruff, Liqun Luo, Gefeng Zhu, Koji Tamada, Lieping Chen
The central nervous system (CNS) is an immune-privileged organ with the capacity to prevent excessive inflammation. Aside from the blood-brain barrier, active immunosuppressive mechanisms remain largely unknown. We report that a neuron-specific molecule, synaptic adhesion-like molecule 5 (SALM5), is a crucial contributor to CNS immune privilege. We found that SALM5 suppressed lipopolysaccharide-induced inflammatory responses in the CNS and that a SALM-specific monoclonal antibody promoted inflammation in the CNS, and thereby aggravated clinical symptoms of mouse experimental autoimmune encephalomyelitis...
April 2016: Science Advances
https://www.readbyqxmd.com/read/26936508/pd-l1-b7-h1-and-pd-1-pathway-blockade-for-cancer-therapy-mechanisms-response-biomarkers-and-combinations
#11
REVIEW
Weiping Zou, Jedd D Wolchok, Lieping Chen
PD-L1 and PD-1 (PD) pathway blockade is a highly promising therapy and has elicited durable antitumor responses and long-term remissions in a subset of patients with a broad spectrum of cancers. How to improve, widen, and predict the clinical response to anti-PD therapy is a central theme in the field of cancer immunology and immunotherapy. Oncologic, immunologic, genetic, and biological studies focused on the human cancer microenvironment have yielded substantial insight into this issue. Here, we focus on tumor microenvironment and evaluate several potential therapeutic response markers including the PD-L1 and PD-1 expression pattern, genetic mutations within cancer cells and neoantigens, cancer epigenetics and effector T cell landscape, and microbiota...
March 2, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/26842342/a-monoclonal-antibody-against-kcnk9-k-channel-extracellular-domain-inhibits-tumour-growth-and-metastasis
#12
Han Sun, Liqun Luo, Bachchu Lal, Xinrong Ma, Lieping Chen, Christine L Hann, Amy M Fulton, Daniel J Leahy, John Laterra, Min Li
Two-pore domain potassium (K2P) channels act to maintain cell resting membrane potential--a prerequisite for many biological processes. KCNK9, a member of K2P family, is implicated in cancer, owing to its overexpression in human tumours and its ability to promote neoplastic cell survival and growth. However, KCNK9's underlying contributions to malignancy remain elusive due to the absence of specific modulators. Here we describe the development of monoclonal antibodies against the KCNK9 extracellular domain and their functional effects...
February 4, 2016: Nature Communications
https://www.readbyqxmd.com/read/26829031/immunophenotyping-of-stage-iii-melanoma-reveals-parameters-associated-with-patient-prognosis
#13
Nicolas Jacquelot, María Paula Roberti, David P Enot, Sylvie Rusakiewicz, Michaela Semeraro, Sarah Jégou, Camila Flores, Lieping Chen, Byoung S Kwon, Christophe Borg, Benjamin Weide, François Aubin, Stéphane Dalle, Holbrook Kohrt, Maha Ayyoub, Guido Kroemer, Aurélien Marabelle, Andréa Cavalcanti, Alexander Eggermont, Laurence Zitvogel
Stage III metastatic melanomas require adequate adjuvant immunotherapy to prevent relapses. Prognostic factors are awaited to optimize the clinical management of these patients. The magnitude of metastatic lymph node invasion and the BRAF(V600) activating mutation have clinical significance. Based on a comprehensive immunophenotyping of 252 parameters per patient in paired blood and metastatic lymph nodes performed in 39 metastatic melanomas, we found that blood markers were as contributive as tumor-infiltrated lymphocyte immunotypes, and parameters associated with lymphocyte exhaustion/suppression showed higher clinical significance than those related to activation or lineage...
May 2016: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/26684741/correction-pd-l1-expression-on-retrovirus-infected-cells-mediates-immune-escape-from-cd8-t-cell-killing
#14
Ilseyar Akhmetzyanova, Malgorzata Drabczyk, C Preston Neff, Kathrin Gibbert, Kirsten K Dietze, Tanja Werner, Jia Liu, Lieping Chen, Karl S Lang, Brent E Palmer, Ulf Dittmer, Gennadiy Zelinskyy
No abstract text is available yet for this article.
December 2015: PLoS Pathogens
https://www.readbyqxmd.com/read/26637664/correction-pd-1-upregulated-on-regulatory-t-cells-during-chronic-virus-infection-enhances-the-suppression-of-cd8-t-cell-immune-response-via-the-interaction-with-pd-l1-expressed-on-cd8-t-cells
#15
Hyo Jin Park, Joon Seok Park, Yun Hee Jeong, Jimin Son, Young Ho Ban, Byoung-Hee Lee, Lieping Chen, Jun Chang, Doo Hyun Chung, Inhak Choi, Sang-Jun Ha
No abstract text is available yet for this article.
December 15, 2015: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/26484769/pd-l1-expression-on-retrovirus-infected-cells-mediates-immune-escape-from-cd8-t-cell-killing
#16
Ilseyar Akhmetzyanova, Malgorzata Drabczyk, C Preston Neff, Kathrin Gibbert, Kirsten K Dietze, Tanja Werner, Jia Liu, Lieping Chen, Karl S Lang, Brent E Palmer, Ulf Dittmer, Gennadiy Zelinskyy
Cytotoxic CD8+ T Lymphocytes (CTL) efficiently control acute virus infections but can become exhausted when a chronic infection develops. Signaling of the inhibitory receptor PD-1 is an important mechanism for the development of virus-specific CD8+ T cell dysfunction. However, it has recently been shown that during the initial phase of infection virus-specific CD8+ T cells express high levels of PD-1, but are fully competent in producing cytokines and killing virus-infected target cells. To better understand the role of the PD-1 signaling pathway in CD8+ T cell cytotoxicity during acute viral infections we analyzed the expression of the ligand on retrovirus-infected cells targeted by CTLs...
October 2015: PLoS Pathogens
https://www.readbyqxmd.com/read/26476532/modulation-of-protease-activated-receptor-expression-by-porphyromonas-gingivalis-in-human-gingival-epithelial-cells
#17
Diya Zhang, Shenglai Li, Lingjing Hu, Lieping Sheng, Lili Chen
BACKGROUND: Protease-activated receptors (PARs) are G-protein-coupled receptors with an active role in mediating inflammation, pain and other functions. The oral pathogen Porphyromonas gingivalis (P. gingivalis) secretes proteases that activate PARs. The aim of this study was to elucidate the role of PARs in the pathogenesis of chronic periodontitis by expression analysis of PARs in human gingival epithelial cells (GECs) before and after P. gingivalis supernatants treatment. METHODS: GECs were isolated from healthy human gingival tissue samples...
2015: BMC Oral Health
https://www.readbyqxmd.com/read/26325035/anti-pd-1-pd-l1-therapy-of-human-cancer-past-present-and-future
#18
REVIEW
Lieping Chen, Xue Han
Major progress has been made toward our understanding of the programmed death-1/programmed death ligand-1 (PD-1/PD-L1) pathway (referred to as the PD pathway). mAbs are already being used to block the PD pathway to treat human cancers (anti-PD therapy), especially advanced solid tumors. This therapy is based on principles that were discovered through basic research more than a decade ago, but the great potential of this pathway to treat a broad spectrum of advanced human cancers is just now becoming apparent...
September 2015: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/26317902/characterization-of-tumor-infiltrating-lymphocytes-in-paired-primary-and-metastatic-renal-cell-carcinoma-specimens
#19
Marina K Baine, Gabriela Turcu, Christopher R Zito, Adebowale J Adeniran, Robert L Camp, Lieping Chen, Harriet M Kluger, Lucia B Jilaveanu
Renal cell carcinoma (RCC) is one of the most chemo- and radio-resistant malignancies, with poor associated patient survival if the disease metastasizes. With recent advances in immunotherapy, particularly with PD-1/PD-L1 blockade, outcomes are improving, but a substantial subset of patients does not respond to the new agents. Identifying such patients and improving the therapeutic ratio has been a challenge, although much effort has been made to study PD-1/PD-L1 status in pre-treatment tumor. However, tumor infiltrating lymphocyte (TIL) content might also be predictive of response, and our goal was to characterize TIL content and PD-L1 expression in RCC tumors from various anatomic sites...
September 22, 2015: Oncotarget
https://www.readbyqxmd.com/read/26137416/consensus-nomenclature-for-cd8-t-cell-phenotypes-in-cancer
#20
Lionel Apetoh, Mark J Smyth, Charles G Drake, Jean-Pierre Abastado, Ron N Apte, Maha Ayyoub, Jean-Yves Blay, Marc Bonneville, Lisa H Butterfield, Anne Caignard, Chiara Castelli, Federica Cavallo, Esteban Celis, Lieping Chen, Mario P Colombo, Begoña Comin-Anduix, Georges Coukos, Madhav V Dhodapkar, Glenn Dranoff, Ian H Frazer, Wolf-Hervé Fridman, Dmitry I Gabrilovich, Eli Gilboa, Sacha Gnjatic, Dirk Jäger, Pawel Kalinski, Howard L Kaufman, Rolf Kiessling, John Kirkwood, Alexander Knuth, Roland Liblau, Michael T Lotze, Enrico Lugli, Francesco Marincola, Ignacio Melero, Cornelis J Melief, Thorsten R Mempel, Elizabeth A Mittendorf, Kunle Odun, Willem W Overwijk, Anna Karolina Palucka, Giorgio Parmiani, Antoni Ribas, Pedro Romero, Robert D Schreiber, Gerold Schuler, Pramod K Srivastava, Eric Tartour, Danila Valmori, Sjoerd H van der Burg, Pierre van der Bruggen, Benoît J van den Eynde, Ena Wang, Weiping Zou, Theresa L Whiteside, Daniel E Speiser, Drew M Pardoll, Nicholas P Restifo, Ana C Anderson
Whereas preclinical investigations and clinical studies have established that CD8(+) T cells can profoundly affect cancer progression, the underlying mechanisms are still elusive. Challenging the prevalent view that the beneficial effect of CD8(+) T cells in cancer is solely attributable to their cytotoxic activity, several reports have indicated that the ability of CD8(+) T cells to promote tumor regression is dependent on their cytokine secretion profile and their ability to self-renew. Evidence has also shown that the tumor microenvironment can disarm CD8(+) T cell immunity, leading to the emergence of dysfunctional CD8(+) T cells...
April 2015: Oncoimmunology
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