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Treg&HNSCC

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https://www.readbyqxmd.com/read/28592285/blockade-of-adenosine-a2a-receptor-enhances-cd8-t-cells-response-and-decreases-regulatory-t-cells-in-head-and-neck-squamous-cell-carcinoma
#1
Si-Rui Ma, Wei-Wei Deng, Jian-Feng Liu, Liang Mao, Guang-Tao Yu, Lin-Lin Bu, Ashok B Kulkarni, Wen-Feng Zhang, Zhi-Jun Sun
BACKGROUND: Cancer immunotherapy offers a promising approach in cancer treatment. The adenosine A2A receptor (A2AR) could protect cancerous tissues from immune clearance via inhibiting T cells response. To date, the role of A2AR in head and neck squamous cell carcinoma (HNSCC) has not been investigated. Here, we sought to explore the expression and immunotherapeutic value of A2AR blockade in HNSCC. METHODS: The expression of A2AR was evaluated by immunostaining in 43 normal mucosae, 48 dysplasia and 165 primary HNSCC tissues...
June 7, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28578124/influence-of-photodynamic-therapy-on-peripheral-immune-cell-populations-and-cytokine-concentrations-in-head-and-neck-cancer
#2
M N Theodoraki, K Lorenz, R Lotfi, D Fürst, C Tsamadou, S Jaekle, J Mytilineos, C Brunner, J Theodorakis, T K Hoffmann, S Laban, P J Schuler
BACKGROUND: Photodynamic therapy (PDT) represents a palliative treatment option for a selected group of patients with head and neck squamous cell carcinoma (HNSCC). PDT induces a local inflammatory reaction with the potential to initiate antitumor immune responses. However, the systemic impact on peripheral immune cells has not been described so far. METHODS: HNSCC patients (n=9) were treated with PDT in a palliative setting. All patients had previously undergone several oncologic treatment regimens...
May 31, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28551813/cd45ra-foxp3-high-regulatory-t-cells-have-a-negative-impact-on-the-clinical-outcome-of-head-and-neck-squamous-cell-carcinoma
#3
Fumie Ihara, Daiju Sakurai, Atsushi Horinaka, Yuji Makita, Akira Fujikawa, Toshioki Sakurai, Kazuki Yamasaki, Naoki Kunii, Shinichiro Motohashi, Toshinori Nakayama, Yoshitaka Okamoto
BACKGROUND: Although regulatory T cells (Tregs) are thought to play an important role in immune suppression, their clinical significance in head and neck squamous cell carcinoma (HNSCC) is unclear. A recent study reported Tregs could be divided into functional subsets based on the expression of CD45RA and Foxp3. METHOD: The frequency of circulating Treg subsets was analyzed in patients with HNSCC and compared with the frequency in patients with benign tumors. The association of Treg subsets with the frequency of lymphocyte subsets, status of progression, clinical course, and prognosis were also examined...
May 27, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28465362/bitter-melon-enhances-natural-killer-mediated-toxicity-against-head-and-neck-cancer-cells
#4
Sourav Bhattacharya, Naoshad Muhammad, Robert Steele, Jacki Kornbluth, Ratna B Ray
Natural killer (NK) cells are one of the major components of innate immunity, with the ability to mediate antitumor activity. Understanding the role of NK-cell-mediated tumor killing in controlling of solid tumor growth is still in the developmental stage. We have shown recently that bitter melon extract (BME) modulates the regulatory T cell (Treg) population in head and neck squamous cell carcinoma (HNSCC). However, the role of BME in NK-cell modulation against HNSCC remains unknown. In this study, we investigated whether BME can enhance the NK-cell killing activity against HNSCC cells...
June 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/27999760/lag-3-confers-poor-prognosis-and-its-blockade-reshapes-antitumor-response-in-head-and-neck-squamous-cell-carcinoma
#5
Wei-Wei Deng, Liang Mao, Guang-Tao Yu, Lin-Lin Bu, Si-Rui Ma, Bing Liu, J Silvio Gutkind, Ashok B Kulkarni, Wen-Feng Zhang, Zhi-Jun Sun
Immunotherapy with immune checkpoint molecule-specific monoclonal antibody have obtained encouraging results from preclinical studies and clinical trials, which promoted us to explore whether this kind of immunotherapy could be applicable to head and neck squamous cell carcinoma (HNSCC). Lymphocyte activation gene-3 (LAG-3) is an immune checkpoint control protein that negatively regulates T cells and immune response. Here, using the human tissue samples, we report these findings that LAG-3 is overexpressed on tumor-infiltrating lymphocytes (TILs; p < 0...
2016: Oncoimmunology
https://www.readbyqxmd.com/read/27777979/the-head-and-neck-cancer-immune-landscape-and-its-immunotherapeutic-implications
#6
Rajarsi Mandal, Yasin Şenbabaoğlu, Alexis Desrichard, Jonathan J Havel, Martin G Dalin, Nadeem Riaz, Ken-Wing Lee, Ian Ganly, A Ari Hakimi, Timothy A Chan, Luc G T Morris
Recent clinical trials have demonstrated a clear survival advantage in advanced head and neck squamous cell carcinoma (HNSCC) patients treated with immune checkpoint blockade. These emerging results reveal that HNSCC is one of the most promising frontiers for immunotherapy research. However, further progress in head and neck immuno-oncology will require a detailed understanding of the immune infiltrative landscape found in these tumors. We leveraged transcriptome data from 280 tumors profiled by The Cancer Genome Atlas (TCGA) to comprehensively characterize the immune landscape of HNSCC in order to develop a rationale for immunotherapeutic strategies in HNSCC and guide clinical investigation...
October 20, 2016: JCI Insight
https://www.readbyqxmd.com/read/27177223/blockade-of-mcp-1-ccr4-signaling-induced-recruitment-of-activated-regulatory-cells-evokes-an-antitumor-immune-response-in-head-and-neck-squamous-cell-carcinoma
#7
Wei Sun, Wei-Jin Li, Fan-Qin Wei, Thian-Sze Wong, Wen-Bin Lei, Xiao-Lin Zhu, Jian Li, Wei-Ping Wen
FoxP3+ regulatory T (Treg) cells have diverse functions in the suppression of antitumor immunity. We show that FoxP3hiCD45RA-CD4+ Treg cells [activated Treg (aTreg) cells] are the predominant cell population among tumor-infiltrating FoxP3+ T cells, and that high aTreg cell-infiltrating content is associated with reduced survival in patients with head and neck squamous cell carcinoma (HNSCC). In vitro studies have demonstrated that aTreg cells can suppress tumor-associated antigen (TAA) effector T cell immune responses in HNSCC...
June 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/27120805/immunomodulatory-role-of-bitter-melon-extract-in-inhibition-of-head-and-neck-squamous-cell-carcinoma-growth
#8
Sourav Bhattacharya, Naoshad Muhammad, Robert Steele, Guangyong Peng, Ratna B Ray
Head and neck squamous cell carcinoma (HNSCC) is the sixth most common cancer and leading cause of cancer related mortality worldwide. Despite the advancement in treatment procedures the overall survival rate of patients has not considerably enhanced in the past few decades. Therefore, new strategies to achieve a favorable response for the improvement in the prognosis of HNSCC are urgently needed. In this study, we examined the role of bitter melon extract (BME) in HNSCC tumor microenvironment. Mouse head and neck cancer (SCCVII) cells were subcutaneously injected into the flanks of syngeneic mice...
May 31, 2016: Oncotarget
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