báo cáo hóa học: yuDetecting the percent of peripheral blood mononuclear cells displaying p-STAT-3 in malignant glioma patients

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : yuDetecting the percent of peripheral blood mononuclear cells displaying p-STAT-3 in malignant glioma patients
Nội dung trích xuất từ tài liệu:
báo cáo hóa học:" yuDetecting the percent of peripheral blood mononuclear cells displaying p-STAT-3 in malignant glioma patients"Journal of Translational Medicine BioMed Central Open AccessResearchyuDetecting the percent of peripheral blood mononuclear cellsdisplaying p-STAT-3 in malignant glioma patientsWilliam Humphries†1, Yongtao Wang†1, Wei Qiao2, Chantal Reina-Ortiz1,Mohamed K Abou-Ghazal1, Lamonne M Crutcher1, Jun Wei1, Ling-Yuan Kong1, Raymond Sawaya1, Ganesh Rao1, Jeffrey Weinberg1,Sujit S Prabhu1, Gregory N Fuller3 and Amy B Heimberger*1Address: 1Department of Neurosurgery, The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA, 2Department of Biostatistics,The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA and 3Department of Pathology, The University of Texas M. D. AndersonCancer Center, Houston, TX, USAEmail: William Humphries - humphrie@bcm.edu; Yongtao Wang - TonWang@mdanderson.org; Wei Qiao - wqiao@mdanderson.org;Chantal Reina-Ortiz - chantalreina@gmail.com; Mohamed K Abou-Ghazal - ghazel79@hotmail.com;Lamonne M Crutcher - LCrutcher@mdanderson.org; Jun Wei - JunWei@mdanderson.org; Ling-Yuan Kong - lkong@mdanderson.org;Raymond Sawaya - rsawaya@mdanderson.org; Ganesh Rao - grao@mdanderson.org; Jeffrey Weinberg - jweinberg@mdanderson.org;Sujit S Prabhu - sprabhu@mdanderson.org; Gregory N Fuller - gfuller@mdanderson.org; Amy B Heimberger* - aheimber@mdanderson.org* Corresponding author †Equal contributorsPublished: 9 November 2009 Received: 24 June 2009 Accepted: 9 November 2009Journal of Translational Medicine 2009, 7:92 doi:10.1186/1479-5876-7-92This article is available from: http://www.translational-medicine.com/content/7/1/92© 2009 Humphries et al; licensee BioMed Central Ltd.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0),which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Background: The signal transducer and activator of transcription 3 (STAT-3) is frequently overexpressed in cancer cells, propagates tumorigenesis, and is a key regulator of immune suppression in cancer patients. The presence of phosphorylated STAT-3 (p-STAT-3) in the tumor can induce p-STAT-3 in tumor-associated immune cells that can return to the circulatory system. We hypothesized that the number of peripheral blood mononuclear cells (PBMCs) displaying p- STAT-3 would be increased in glioma patients, which would correlate with the extent of tumor- expressed p-STAT-3, and that higher p-STAT-3 levels in peripheral blood would correlate with a higher fraction of immune-suppressive regulatory T cells (Tregs). Methods: We measured the percentage of PBMCs displaying p-STAT-3 in 19 healthy donors and 45 patients with primary brain tumors. The level of p-STAT-3 in tumor tissue was determined by immunohistochemistry. The degree of immune suppression was determined based on the fraction of Tregs in the CD4 compartment. Results: Healthy donors had 4.8 ± 3.6% of PBMCs that expressed p-STAT-3, while the mean proportion of PBMCs displaying p-STAT-3 in patients with GBM was 11.8 ± 13.5% (P = 0.03). We did not observe a correlation by Spearman correlation between the degree of p-STAT-3 levels in the tumor and the percent of PBMCs displaying p-STAT-3. Furthermore, the percent of PBMCs displaying p-STAT-3 in glioma patients was not directly correlated with the fraction of Tregs in the CD4 compartment. Conclusion: We conclude that the percent of PBMCs displaying p-STAT-3 may be increased in malignant glioma patients. Page 1 of 9 (page number not for citation purposes)Journal of Translational Medicine 2009, 7:92 http://www.translational-medicine.com/content/7/1/92 tion [26]. Over ...