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Zhang Y, Chai N, Wei Z, Li Z, Zhang L, Zhang M, Ren J, Xu R, Pang X, Zhang B, Tang Q, Sui H. YYFZBJS inhibits colorectal tumorigenesis by enhancing Tregs-induced immunosuppression through HIF-1α mediated hypoxia in vivo and in vitro. Phytomedicine 2022; 98:153917. [PMID: 35093671 DOI: 10.1016/j.phymed.2021.153917] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/29/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND AND PURPOSE The occurrence of colorectal cancer (CRC) is associated with a variety of factors. Accumulating evidence shows that peripheral differentiation of regulatory T cells (Tregs) is critical in controlling tumorigenesis. Our previous studies demonstrated that the Yi-Yi-Fu-Zi-Bai-Jiang-San (YYFZBJS) extract exerted potent anticancer activities by significantly enhancing immunosuppression in ApcMin/+ mice. However, there is limited knowledge on the effect of YYFZBJS in the prevention of colorectal cancer and the underlying mechanisms of action. METHODS In this study, we investigated the effect of oral administration of YYFZBJS in preventing azoxymethane (AOM)/dextran sulfate sodium (DSS)-induced tumorigenesis. We found that YYFZBJS treatment decreased tumor load, tumor number, histology, and the severity of disease activity index (DAI) scores. To investigate if YYFZBJS inhibited tumorigenesis by regulating regulatory T cells, we depleted Tregs in AOM/DSS mice. We then analyzed the effect of intragastric administration of YYFZBJS on tumorigenesis and the regulation of tumor microenvironment. RESULTS As expected, intragastric administration of YYFZBJS in AOM/DSS mice model significantly increased immune responses in the tumor microenvironment through its hypoxia-associated anti-cancer activities. Additionally, YYFZBJS regulated the polarization of peripheral Treg (pTreg) to suppress CRC cell proliferation and infiltration. This was demonstrated by the decrease in tumor proliferation-related proteins including p-STAT3, p-NF-κB and MMPs in a dose-dependent manner. Clinically, the increase in the levels of Tregs in human tissues during CRC progression was associated with low expression of HIF-1α in the stroma, and correlated with CRC survival and prognosis. CONCLUSION Altogether, we demonstrated that HIF-1α may promote pTreg -induced carcinogenesis and progression of CRC cells, indicating that YYFZBJS is a promising protective agent against HIF-1α-mediated Treg activation in colorectal cancer. This study is the first to imply a novel clinical significance of a traditional Chinese herbal medicine from Synopsis of Golden Chamber in the cancer treatment and clarify the important role of tumor microenvironment in preventing tumorigenesis.
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Affiliation(s)
- Yuli Zhang
- Medical Experiment Center, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201803, China
| | - Ni Chai
- Oncology department, Yueyang Hospital of Integrated of Traditional Chinese and western medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
| | - Zhenzhen Wei
- Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Zan Li
- Medical Experiment Center, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201803, China
| | - Lu Zhang
- Department of Integrated Chinese and Western Medicine, Henan Cancer Hospital, Affiliated Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - Mengjie Zhang
- Medical Experiment Center, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201803, China
| | - Junze Ren
- Changhai Hospital of Traditional Chinese Medicine, Naval Medical University, Shanghai 200433, China
| | - Renjie Xu
- Department of Rehabilitation Medicine, PLA Marine Corps Hospital, Guangdong 521011, China
| | - Xiufeng Pang
- Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Bimeng Zhang
- Department of Acupuncture and Moxibustion, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China.
| | - Qingfeng Tang
- Medical Experiment Center, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201803, China; Department of Clinical Laboratory, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201803, China.
| | - Hua Sui
- Medical Experiment Center, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201803, China.
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Chai N, Xiong Y, Zhang Y, Cheng Y, Shi W, Yao Y, Sui H, Zhu H. YYFZBJS inhibits colorectal tumorigenesis by remodeling gut microbiota and influence on M2 macrophage polarization in vivo and in vitro. Am J Cancer Res 2021; 11:5338-5357. [PMID: 34873464 PMCID: PMC8640793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023] Open
Abstract
Our previous studies indicated that the extract of Yi-Yi-Fu-Zi-Bai-Jiang-San (YYFZBJS) had potent anticancer activities by significantly inhibiting intestinal tumor development in ApcMin/+ mice. However, knowledge regarding the mechanism and effect of YYFZBJS in the prevention of colorectal cancer is limited. In this study, we aim to investigate the preventive effects of YYFZBJS in enterotoxigenic Bacteroides fragilis (ETBF)-colonized mice with azoxymethane (AOM)/dextran sulfate sodium (DSS)-induced tumorigenesis. First, the colonic tissues of the AOM/DSS mouse models were collected for biomedical analysis, and gut microbiota profiling was detected post YYFZBJS treatment using a 16S rRNA gene sequencing. Then, antibiotic solution (Abx) mice were acclimated with AOM/DSS treatment and then fed with ETBF with or without YYFZBJS for three cycles. As expected, the intragastric administration of YYFZBJS in the AOM/DSS mouse model significantly decreased the tumor load, the severity of disease activity index (DAI) scores, and the level of M2 macrophage markers such as CD206, Arg-1 and IL-10. Notably, the reverse of polarized macrophages induced by YYFZBJS could suppress CRC cell proliferation and infiltration, as demonstrated by the decrease of some tumor proliferation-related proteins in a dose-dependent manner. Importantly, ETBF dysbiosis can contribute to colon tumor development by stimulating p-STAT3 mediated M2 macrophages polarization to promote chronic inflammation and adenoma malignant transformation, which YYFZBJS can effectively limit. Altogether, we demonstrate that ETBF dysbiosis may contribute to M2 macrophages-promoted colon carcinogenesis and progression of CRC cells, while YYFZBJS could be a promising protective agent against ETBF-mediated colorectal cancer.
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Affiliation(s)
- Ni Chai
- Oncology Department, Yueyang Hospital of Integrated of Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese MedicineShanghai 200437, China
| | - Yibai Xiong
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical SciencesBeijing 100700, China
| | - Yuli Zhang
- Medical Experiment Center, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai 201803, China
- Department of Traditional Chinese Medicine, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai 201803, China
| | - Yuelei Cheng
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese MedicineShanghai 201203, China
| | - Wenfei Shi
- Oncology Department, Shanghai Municipal Hospital of Traditional Chinese Medicine, Shanghai University of Traditional Chinese MedicineShanghai 200271, China
| | - Yiqing Yao
- Oncology Department, Yueyang Hospital of Integrated of Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese MedicineShanghai 200437, China
| | - Hua Sui
- Medical Experiment Center, Jiading Branch of Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai 201803, China
| | - Huirong Zhu
- Shanghai University of Traditional Chinese MedicineShanghai 201203, China
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Sui H, Zhang L, Gu K, Chai N, Ji Q, Zhou L, Wang Y, Ren J, Yang L, Zhang B, Hu J, Li Q. YYFZBJS ameliorates colorectal cancer progression in Apc Min/+ mice by remodeling gut microbiota and inhibiting regulatory T-cell generation. Cell Commun Signal 2020; 18:113. [PMID: 32677955 PMCID: PMC7367414 DOI: 10.1186/s12964-020-00596-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [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: 10/11/2019] [Accepted: 05/11/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Progression of Colorectal cancer (CRC) is influenced by single or compounded environmental factors. Accumulating evidence shows that microbiota can influence the outcome of cancer immunotherapy. T cell, one of the main populations of effector immune cells in antitumor immunity, has been considered as a double-edged sword during the progression of CRC. Our previous studies indicate that traditional Chinese herbs (TCM) have potential anticancer effects in improving quality of life and therapeutic effect. However, little is known about the mechanism of TCM formula in cancer prevention. METHODS Here, we used C57BL/6 J ApcMin/+ mice, an animal model of human intestinal tumorigenesis, to investigate the gut bacterial diversity and their mechanisms of action in gastrointestinal adenomas, and to evaluate the effects of Yi-Yi-Fu-Zi-Bai-Jiang-San (YYFZBJS) on of colon carcinogenesis in vivo and in vitro. Through human-into-mice fecal microbiota transplantation (FMT) experiments from YYFZBJS volunteers or control donors, we were able to differentially modulate the tumor microbiome and affect tumor growth as well as tumor immune infiltration. RESULTS We report herein, YYFZBJS treatment blocked tumor initiation and progression in ApcMin/+ mice with less change of body weight and increased immune function. Moreover, diversity analysis of fecal samples demonstrated that YYFZBJS regulated animal's natural gut flora, including Bacteroides fragilis, Lachnospiraceae and so on. Intestinal tumors from conventional and germ-free mice fed with stool from YYFZBJS volunteers had been decreased. Some inflammation' expression also have been regulated by the gut microbiota mediated immune cells. Intestinal lymphatic, and mesenteric lymph nodes (MLN), accumulated CD4+ CD25+ Foxp3 positive Treg cells were reduced by YYFZBJS treatment in ApcMin/+ mice. Although YYFZBJS had no inhibition on CRC cell proliferation by itself, the altered Tregs mediated by YYFZBJS repressed CRC cancer cell growth, along with reduction of the phosphorylation of β-catenin. CONCLUSIONS In conclusion, we demonstrated that gut microbiota and Treg were involved in CRC development and progression, and we propose YYFZBJS as a new potential drug option for the treatment of CRC. Video abstract.
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Affiliation(s)
- Hua Sui
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Rd, Shanghai, 201203, P.R. China
| | - Lu Zhang
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Rd, Shanghai, 201203, P.R. China
| | - Kaijuan Gu
- Preclinical Medicine College of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Rd, Shanghai, 201203, P.R. China
| | - Ni Chai
- Yueyang Hospital of Integrated of Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, P.R. China
| | - Qing Ji
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Rd, Shanghai, 201203, P.R. China
| | - Lihong Zhou
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Rd, Shanghai, 201203, P.R. China
| | - Yan Wang
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Rd, Shanghai, 201203, P.R. China
| | - Junze Ren
- Changhai Hospital of Traditional Chinese Medicine, Naval Medical University, Shanghai, 200433, P.R. China
| | - Limei Yang
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Rd, Shanghai, 201203, P.R. China
| | - Bimeng Zhang
- Department of Acupuncture and Moxibustion, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 100 Haining Rd, Hongkou District, Shanghai, 200080, P.R. China.
| | - Jing Hu
- Preclinical Medicine College of Shanghai University of Traditional Chinese Medicine, 1200 Cailun Rd, Shanghai, 201203, P.R. China.
| | - Qi Li
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, 528 Zhangheng Rd, Shanghai, 201203, P.R. China. .,Academy of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, P.R. China.
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Kim I, Wu G, Chai N, Jordan S, Klein A. Five Treatment Strategies to Suppress Donor Specific Antibodies: Highlights from a Decade of Research Experience in a Mouse Model of Allo-Sensitization. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Kim I, Wu G, Chai N, Jordan S, Klein A. Dynamic BCMA Expression by Alloreactive B Cells Coupled with Donor Specific Antibody Production during De Novo Alloantibody Responses. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Li L, Linghu E, Chai N, Li Z, Zou J, Du C, Wang X, Xiang J. Efficacy of triamcinolone-soaked polyglycolic acid sheet plus fully covered metal stent for preventing stricture formation after large esophageal endoscopic submucosal dissection. Dis Esophagus 2019; 32:5250776. [PMID: 30561608 DOI: 10.1093/dote/doy121] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Indexed: 12/11/2022]
Abstract
Esophageal stricture is a major problem for patients with large superficial esophageal squamous cell neoplasms (SESCNs) after endoscopic submucosal dissection (ESD). Although many measures could be used as prophylaxis for post-ESD strictures, a well-accepted method has not yet been established. We propose using a triamcinolone-soaked polyglycolic acid sheet plus fully covered metal stent (TS-PGA+FCMS) as a novel method to prevent stricture formation after large esophageal ESD. From June 2016 to May 2017, nine patients with SESCNs (≥3/4 of the esophageal circumference) who underwent TS-PGA+FCMS placement immediately after ESD and did not require additional surgical resection were enrolled in this case series. All stents were removed 4-6 weeks post-ESD. The sizes of mucosal defects in 9 patients were 3/4 (n = 1), 4/5 (n = 2), 1/1 (n = 6). The average size of resection was 90.0 mm (range: 60-140 mm). The incidence of stricture was 33.3% (3/9) of patients. No stricture occurred in 3 patients with noncircumferential resection, while stricture occurred in 50% (3/6) patients with circumferential resection. The median number of EBD sessions was 4 (range: 3-4 sessions). No adverse events or recurrences were observed during the median follow-up period of 15.2 months (range: 12-22 months). The TS-PGA+FCMS method is safe and may decrease the incidence of esophageal stricture and the number of EBD sessions after large esophageal ESD.
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Affiliation(s)
- L Li
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - E Linghu
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - N Chai
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - Z Li
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - J Zou
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - C Du
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - X Wang
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
| | - J Xiang
- Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
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Wu G, Kim I, Chai N, Jordan S, Klein A. Evidence of Maturation Stoppage of Peripheral B-cells Induced by Immunosuppression of Recall Alloantibody Responses. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Chai N, Kim I, Jordan S, Klein A, Wu G. Janus Kinase Inhibitor Tofacitinib Moderates De Novo Donor Specific Antibody Production in a Mouse Model of HLA-A2 Sensitization. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.1053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kim I, De Couto G, Chai N, Wu G, Klein A, Jordan S. Use of Exosome for Alloantibody Suppression: A Study in a Mouse Model of HLA-A2 Sensitization. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.1054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Wu G, Kim I, Chai N, Jordan S, Klein A. Suppression of Recall Alloantibody Responses by CTLA4Ig Is Associated with Reduction of CD138 + Plasma Cells in a Mouse Model of Allosensitization. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.1056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Xu W, Chai N, Cheng Y, Yang Q, Zhu H. Analysis on the principles of differentiation and prescription of traditional Chinese medicine in the treatment of cancerous fever. Tradit Med Res 2017. [DOI: 10.53388/tmr201705036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Liu N, Zhou N, Chai N, Liu X, Jiang H, Wu Q, Li Q. Helicobacter pylori promotes angiogenesis depending on Wnt/beta-catenin-mediated vascular endothelial growth factor via the cyclooxygenase-2 pathway in gastric cancer. BMC Cancer 2016; 16:321. [PMID: 27198692 PMCID: PMC4873996 DOI: 10.1186/s12885-016-2351-9] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [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: 04/11/2015] [Accepted: 05/11/2016] [Indexed: 12/11/2022] Open
Abstract
Background Helicobacter pylori is an important pathogenic factor in gastric carcinogenesis. Angiogenesis (i.e., the growth of new blood vessels) is closely associated with the incidence and development of gastric cancer. Our previous study found that COX-2 stimulates gastric cancer cells to induce expression of the angiogenic growth factor VEGF through an unknown mechanism. Therefore, the aim of this study was to clarify the role of angiogenesis in H. pylori-induced gastric cancer development. Methods To clarify the relationship between H. pylori infection and angiogenesis, we first investigated H. pylori colonization, COX-2, VEGF, beta-catenin expression, and microvessel density (MVD) in gastric cancer tissues from 106 patients. In addition, COX-2, phospho-beta-catenin, and beta-catenin expression were measured by western blotting, and VEGF expression was measured by ELISA in H. pylori-infected SGC7901 and MKN45 human gastric cancer cells. Results H. pylori colonization occurred in 36.8 % of gastric carcinoma samples. Furthermore, COX-2, beta-catenin, and VEGF expression, and MVD were significantly higher in H. pylori-positive gastric cancer tissues than in H. pylori-negative gastric cancer tissues (P < 0.01). H. pylori infection was not related to sex or age in gastric cancer patients, but correlated with the depth of tumor invasion, lymph node metastasis, and tumor–node–metastasis stage (P < 0.05) and correlated with the COX-2 expression and beta-catenin expression(P < 0.01). Further cell experiments confirmed that H. pylori infection upregulated VEGF in vitro. Further analysis revealed that H. pylori-induced VEGF expression was mediated by COX-2 via activation of the Wnt/beta-catenin pathway. Conclusions The COX-2/Wnt/beta-catenin/VEGF pathway plays an important role in H. pylori-associated gastric cancer development. The COX-2/Wnt/beta-catenin pathway is therefore a novel therapeutic target for H. pylori-associated gastric cancers.
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Affiliation(s)
- Ningning Liu
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, No. 528 Zhangheng Road, Shanghai, 201203, P. R. China
| | - Ning Zhou
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, No. 528 Zhangheng Road, Shanghai, 201203, P. R. China
| | - Ni Chai
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, No. 528 Zhangheng Road, Shanghai, 201203, P. R. China
| | - Xuan Liu
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, No. 528 Zhangheng Road, Shanghai, 201203, P. R. China
| | - Haili Jiang
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, No. 528 Zhangheng Road, Shanghai, 201203, P. R. China
| | - Qiong Wu
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, No. 528 Zhangheng Road, Shanghai, 201203, P. R. China
| | - Qi Li
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, No. 528 Zhangheng Road, Shanghai, 201203, P. R. China.
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Wu G, Kim I, Chai N, Klein A, Jordan S. Ibrutinib Suppresses De Novo Alloantibodies and Recall Antibody Responses in a Mouse Model of Allosensitization: A Preliminary Report. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Kim I, WU G, Chai N, Klein A, Jordan S. Alloantibody Suppression by Bruton Tyrosine Kinase Antagonist Ibrutinib Is Associated with Splenic B-Cell Reduction: A Study of Multiparameter Flow Cytometry. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Zhou L, Feng Y, Jin Y, Liu X, Sui H, Chai N, Chen X, Liu N, Wang Y, Li Q. Abstract 1762: Verbascoside promotes apoptosis by regulating HIPK2-p53 signaling in human colorectal cancer. Cancer Res 2015. [DOI: 10.1158/1538-7445.am2015-1762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: We investigated the role of the HIPK2-p53 signaling pathway in tumorigenesis and resistance to the drug Verbascoside (VB) in colorectal cancer (CRC), using in vivo and in vitro experiments.
Methods: Primary human CRC samples and normal intestinal tissues from patients were analyzed for HIPK2 expression by immunohistochemistry (IHC) and its expression was correlated against patients’ clinicopathological characteristics. Human CRC HCT-116 cells were implanted in BALB/c nude mice; mice with xenografted tumors were randomly administrated vehicle (control), 20, 40, or 80 mg/mL VB, or 1 mg/mL fluorouracil (5-FU). HIPK2, p53, Bax, and Bcl-2 expression in these tumors were determined by IHC. In vitro effects of VB on CRC cell proliferation and apoptosis were measured by CCK-8 assay and flow cytometry; HIPK2, p53, p-p53, Bax, and Bcl-2 were measured by western blot.
Results: IHC analysis for 100 human CRC tumor samples and 20 normal intestinal tissues, showed HIPK2 expression to inversely correlate with Dukes stage and depth of invasion in CRC (P <0.05). In vivo, the inhibition rates of 20, 40, and 80 mg/mL VB on CRC xenograft tumor weight were 42.79%, 53.90%, and 60.99%, respectively, and were accompanied by increased expression of HIPK2, p53, and Bax, and decreased Bcl-2 expression in treated tumors. In vitro, VB significantly inhibited proliferation of CRC cell lines HCT-116, HT-29, LoVo, and SW620, in a time- and dose-dependent manner. The apoptosis rates of 25, 50, and 100 μM VB on HCT-116 cells were 10.83 ± 1.28, 11.25 ± 1.54, and 20.19 ± 2.87%, and on HT-29 cells were 18.92 ± 6.12, 21.57 ± 4.05, and 25.14 ± 6.73%, respectively. In summary, VB treatment significantly enhanced the protein expression of pro-apoptotic HIPK2, p53, p-p53, Bax, and decreased anti-apoptotic Bcl-2 expression in CRC cells.
Conclusions: HIPK2 protein modulates the phosphorylation status of p53, and levels of Bax and Bcl-2 in CRC. We also found that VB effectively activated the HIPK2-p53 signaling pathway, resulting in increased CRC cells apoptosis.
Note: This abstract was not presented at the meeting.
Citation Format: Lihong Zhou, Yuanyuan Feng, Yongjie Jin, Xuan Liu, Hua Sui, Ni Chai, Xingzhu Chen, Ningning Liu, Yan Wang, Qi Li. Verbascoside promotes apoptosis by regulating HIPK2-p53 signaling in human colorectal cancer. [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr 1762. doi:10.1158/1538-7445.AM2015-1762
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Affiliation(s)
- Lihong Zhou
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Yuanyuan Feng
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Yongjie Jin
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Xuan Liu
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Hua Sui
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Ni Chai
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Xingzhu Chen
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Ningning Liu
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
| | - Yan Wang
- 2Longhua Hospital, Shanghai University of TCM, Shanghai, China
| | - Qi Li
- 1Shuguang Hospital, Shanghai University of TCM, Shanghai, China
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WU G, Kim I, Chai N, Jordan S, Klein A. CTLA4Ig Administered During T-Cell Priming Suppresses De Novo Alloantibodies and Minimizes Recall Antibody Responses. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Kim I, Wu G, Chai N, Jordan S, Klein A. Evidence That CTLA4Ig Attenuates Recall Alloantibody Responses By Interacting With Antibody Forming Cells. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Abstract
The cause and pathogenesis of colorectal cancer are still not completely understood. The development of microbiology in recent years has increasingly provided more evidence for the importance of infectious agents in colorectal cancer. This review highlights investigations of four agents in relation to colorectal cancer: Escherichia coli, Helicobacter pylori, Bacterooides fragilis, and Streptococcus bovis. The possible mechanisms of carcinogenesis for each of these agents and epidemiologic evidence are discussed.
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Zhou L, Feng Y, Jin Y, Liu X, Sui H, Chai N, Chen X, Liu N, Ji Q, Wang Y, Li Q. Verbascoside promotes apoptosis by regulating HIPK2-p53 signaling in human colorectal cancer. BMC Cancer 2014; 14:747. [PMID: 25282590 PMCID: PMC4197337 DOI: 10.1186/1471-2407-14-747] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 09/26/2014] [Indexed: 01/18/2023] Open
Abstract
Background We investigated the role of the HIPK2–p53 signaling pathway in tumorigenesis and resistance to the drug Verbascoside (VB) in colorectal cancer (CRC), using in vivo and in vitro experiments. Methods Primary human CRC samples and normal intestinal tissues from patients were analyzed for HIPK2 expression by immunohistochemistry (IHC) and its expression was correlated against patients’ clinicopathological characteristics. Human CRC HCT-116 cells were implanted in BALB/c nude mice; mice with xenografted tumors were randomly administrated vehicle (control), 20, 40, or 80 mg/mL VB, or 1 mg/mL fluorouracil (5-FU). HIPK2, p53, Bax, and Bcl-2 expression in these tumors were determined by IHC. In vitro effects of VB on CRC cell proliferation and apoptosis were measured by CCK-8 assay and flow cytometry; HIPK2, p53, p-p53, Bax, and Bcl-2 were measured by western blot. Results IHC analysis for 100 human CRC tumor samples and 20 normal intestinal tissues, showed HIPK2 expression to inversely correlate with Dukes stage and depth of invasion in CRC (P < 0.05). In vivo, the inhibition rates of 20, 40, and 80 mg/mL VB on CRC xenograft tumor weight were 42.79%, 53.90%, and 60.99%, respectively, and were accompanied by increased expression of HIPK2, p53, and Bax, and decreased Bcl-2 expression in treated tumors. In vitro, VB significantly inhibited proliferation of CRC cell lines HCT-116, HT-29, LoVo, and SW620, in a time- and dose-dependent manner. The apoptosis rates of 25, 50, and 100 μM VB on HCT-116 cells were 10.83 ± 1.28, 11.25 ± 1.54, and 20.19 ± 2.87%, and on HT-29 cells were 18.92 ± 6.12, 21.57 ± 4.05, and 25.14 ± 6.73%, respectively. In summary, VB treatment significantly enhanced the protein expression of pro-apoptotic HIPK2, p53, p-p53, Bax, and decreased anti-apoptotic Bcl-2 expression in CRC cells. Conclusions HIPK2 protein modulates the phosphorylation status of p53, and levels of Bax and Bcl-2 in CRC. We also found that VB effectively activated the HIPK2–p53 signaling pathway, resulting in increased CRC cell apoptosis.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Qi Li
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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WU G, Kim I, Chai N, Jordan S, Klein A. IL-6 Blockage by Anti-Interleukin-6 Receptor Antibody Suppresses Plasma Cells during Development of Alloantibody Responses. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Wu G, Chai N, Kim I, Klein AS, Jordan SC. Monoclonal anti-interleukin-6 receptor antibody attenuates donor-specific antibody responses in a mouse model of allosensitization. Transpl Immunol 2013; 28:138-43. [PMID: 23562586 DOI: 10.1016/j.trim.2013.03.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 03/22/2013] [Accepted: 03/25/2013] [Indexed: 12/26/2022]
Abstract
Interleukin 6 is an immune regulatory cytokine that impacts the development and maturation of T-cell, B-cell, and antibody producing plasma cells. A monoclonal antibody to the IL-6R (Tocilizumab®) was recently approved by the FDA for treatment of rheumatoid arthritis. Although anti-IL-6R anitbodies can reduce autoantibody levels in human disease, the use of anti-IL-6R for alloantibody suppression has not been examined. Here, we report on our experience with a mousenized rat-anti-mouse IL-6R (mMR16-1) for attenuating donor-specific antibody (DSA) responses. C57BL/6 mice were sensitized with skin allografts from a HLA.A2 transgenic mouse, and treated with intraperitoneal injections of mMR16-1 or control antibody. DSA responses were monitored weekly for 5weeks by measurement of serum anti-HLA.A2 antibodies in a flow cytometric antibody binding assay. Results show that mMR16-1 significantly reduced DSA IgM, IgG2a and IgG1 responses, respectively, while normalizing serum amyloid A (SAA), an acute phase reactant induced by IL-6 (p<0.01 vs. control). mMR16-1 injections increased mononuclear cell apoptosis in the spleens, as detected by annexin V staining and TUNEL. In conclusion, anti-IL6R attenuates de novo DSA responses and suppresses inflammatory markers (SAA). The data indicate that antibody therapy targeting the IL-6/IL-6R pathway may serve as a strategy to suppress DSA generation.
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Affiliation(s)
- G Wu
- Comprehensive Transplant Center at Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA.
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Papaxanthos M, Petit T, Chai N, Kohl M, Labruyere J, bourgeois A, Marquez S. La sécurité respiratoire des voies aériennes supérieures par une étude endoscopique comparative in live d’un échantillon de primates : hominidés et humains : l’« hypothèse de contact : In-Out ». Neurophysiol Clin 2013. [DOI: 10.1016/j.neucli.2013.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Comizzoli P, Mermillod P, Cognié Y, Chai N, Legendre X, Mauge R. Successful in vitro production of embryos in the red deer (Cervus elaphus) and the sika deer (Cervus nippon). Theriogenology 2001; 55:649-59. [PMID: 11233790 DOI: 10.1016/s0093-691x(01)00433-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [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: 11/19/2022]
Abstract
The aim of our study was to define the conditions for IVM and IVF of oocytes in 2 common deer species as models for endangered related subspecies. Immature oocytes were recovered during the breeding season from postmortem ovaries (red deer) or by repeated laparoscopic follicular aspiration (sika deer). Oocytes were cultured for 24 h in IVM medium supplemented with EGF or FSH and follicular fluid. Stag semen was collected by electroejaculation (both species) or by epididymal flushing (red deer) and cryopreserved. For IVF, oocytes were exposed to different concentrations of thawed spermatozoa in a modified Tyrode albumin lactate pyruvate medium supplemented with 20% (v/v) estrus sheep serum for 18 h. After IVF, presumptive zygotes were allowed to develop in vitro for 7 days in synthetic oviduct fluid (SOF) supplemented with fetal calf serum (10%, v/v). In both species, the presence of ovine FSH and follicular fluid improved the in vitro maturation rate. In the sika deer, the optimal sperm concentration for IVF was 10(6)/mL and some fertilized oocytes reached the early morula stage (20 to 25 cells). In the red deer, after IVF with ejaculated or epididymal spermatozoa (2.0 x 10(6)/mL), 20% of zygotes developed to the blastocyst stage (50 to 80 cells).
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Affiliation(s)
- P Comizzoli
- MNHN, Conservation des Espèces Animales, Paris, France
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Chai N. Vegetative endocarditis in a scimitar-horned oryx (Oryx dammah). J Zoo Wildl Med 1999; 30:587-8. [PMID: 10749451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Streptococcus uberis was cultured from vegetative endocarditis lesions in a scimitar-horned oryx (Oryx dammah) from the Parc de la Haute Touche, France. This is the first reported single isolation of S. uberis from an oryx with vegetative endocarditis leading to fatal congestive heart failure.
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Affiliation(s)
- N Chai
- National Museum of Natural History, Parc de la Haute Touche, Obterre, France
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Chai N, Patel Y, Jacobson K, McMahon J, McMahon A, Rappolee DA. FGF is an essential regulator of the fifth cell division in preimplantation mouse embryos. Dev Biol 1998; 198:105-15. [PMID: 9640334 DOI: 10.1006/dbio.1997.8858] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fibroblast growth factor (FGF) signaling is required prior to gastrulation in the mouse embryo. To test for the spatial and temporal requirements of FGF signaling, a dominant negative FGF receptor (dnFGFR) was used to make transgenic mouse embryos. In mosaic embryos, cell division ceased at the fifth cell division in all cells that expressed the mutant receptor, but cell death did not increase. After the fifth cell division, the progeny of unaltered cells and cells expressing lacZ continued to accumulate at the same rate, suggesting that the FGF requirement is cell autonomous. In mosaic embryos, lacZ, but not dnFGFR expression was detected in mitotic trophoblasts adjacent to the ICM. Conversely, dnFGFR-expressing extraembryonic ectoderm cells were detected at the abembryonic pole in postmitotic cells. In blastocysts expressing the dnFGFR in all cells, the morphology appeared normal and inner cell masses (ICMs) formed, but resultant embryos had only one-third the number of cells as control embryos. In these blastocysts, cell division had also ceased at the fifth cell division, but cavitation, a concurrent morphogenetic event, initiated and progressed normally. To test for the continuing requirement of FGF, FGFR-3 was overexpressed in all cells and resulted in an increase in cell numbers after the fifth cell cycle. In a model for postimplantation development, addition of FGF-4 to blastocyst outgrowths increased the number of extraembryonic ectoderm cells, suggesting a continuing role for FGF. Thus, FGF signaling induces the cell division of embryonic and extraembryonic cells in the preimplantation mouse embryo starting at the fifth cell division. The signal requirement for FGF is cell autonomous, but is not required to prevent cell death. This provides the first evidence for the necessity of a growth factor before implantation.
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Affiliation(s)
- N Chai
- Department of Cell and Molecular Biology, Northwestern University Medical School, Chicago, Illinois 60611, USA
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Najmabadi H, Chai N, Kapali A, Subbarao MN, Bhasin D, Woodhouse E, Yen P, Bhasin S. Genomic structure of a Y-specific ribonucleic acid binding motif-containing gene: a putative candidate for a subset of male infertility. J Clin Endocrinol Metab 1996; 81:2159-64. [PMID: 8964845 DOI: 10.1210/jcem.81.6.8964845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The genetic basis of infertility remains unclear in a majority of infertile men. Deletion mapping studies suggest that genes on the long arm of the Y-chromosome (Yq) may be important in the spermatogenic process and may play a pathogenetic role in a subset of infertile men. Complementary DNA sequences of two Y-specific genes that contain ribonucleic acid binding motifs and, therefore, referred to as RBM genes (previously named YRRM) were published recently. To develop a PCR-single strand conformation polymorphism strategy for detection of point mutations in the RBM gene(s) in infertile men, we determined the genomic structure and flanking sequences at the intron-exon junctions. Two separate strategies were used in parallel to isolate the genomic fragment bearing the RBM gene. The first strategy employed screening of a P1 genomic library using PCR primers corresponding to the sequences in the 5'- and 3'-ends of the published RBM-1 complementary DNA sequence. The second strategy used subcloning of the YAC clone 925D10 (that contained the RBM gene described here) into cosmids. The P1 and cosmid clones were further restriction mapped and subcloned for DNA sequencing. Because the sequences contained in the P1 and cosmid clones were identical, the sequence information was pooled. A 15-kilobase genomic segment includes the entire RBM gene. The genomic structure of this RBM gene is characterized by 12 exons and 11 introns. There is considerable homology among exons VII, VIII, IX, and X; each encodes one of the SRGY boxes. Several introns also have a high degree of homology among them (introns VI, VII, VIII, and IX). Eleven of the 12 exons have complete sequence homology with the RBM-1 sequence. There is 1 base difference in exon IV at position 495 (a T in the previously published DNA sequence vs. an A in the sequence reported here). The exonic sequences of this gene are distinct from that of the RBM-2 gene. The flanking sequences at the exon-intron junctions were also determined and are reported. Reverse transcription-PCR analysis, using human testis ribonucleic acid suggests that this gene is either not expressed in the testis or, more likely, the single base difference from RBM1 represents a polymorphism in the YAC clone. A high degree of homology between intronic and exonic sequences within the same gene and between different members of the RBM gene family (data not reported in this paper) suggests origin from common ancestral sequences; this also indicates that development of a single strand conformation polymorphism approach for detection of point mutations is likely to prove difficult for some of the exons of this gene.
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Affiliation(s)
- H Najmabadi
- Division of Endocrinology, Metabolism, and Molecular Medicine, Charles R. Drew University of Science and Medicine, Los Angeles, California 90059, USA
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Warnet A, Lubetzki J, Pestel M, Mundler O, Mikol J, Lougnon J, Wassef M, Chai N, Bacri D, Goldstein B, Cophignon J. [Two cases of FSH secreting adenomas (author's transl)]. Ann Endocrinol (Paris) 1980; 41:53-4. [PMID: 6772086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The authors report two cases of FSH secreting adenomas in men and attempt to draw out some features of these very uncommon pituitary tumors. Absence of gynecomastia is emphasized. Diagnosis proceeds from systematic radio-immunoassay of pituitary hormones. Evidence of FSH secretion results from paradoxical gonadotropin stimulation by TRH and secretory granules seen by electronic microscope. Immunofluorescence studies are still to perform. Dynamic testicular secretion and, in one case, histologic examination were performed.
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Lubetzki J, Warnet A, Uzan M, Chai N, Thurel C, Viader F, Techenet J. [Hypophyseal adenoma with hypersecreting FSH]. Nouv Presse Med 1978; 7:2254-5. [PMID: 673794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Houdart R, Thurel C, Rey A, Chai N. [Arteriography in pituitary tumors. Pseudotumoral aneurysm]. Neurochirurgie 1975; 21:163-8. [PMID: 1196468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In the presence of any "expansive process" of the sellar region, one must recall that in I % of the instances there may be the possibility of a pseudo-tumoral aneurysm. In a number of cases, neither the clinical study, nor the roentgenologic and tomographic balance of the sellar region, will allow to differentiate an aneurysm and a pituitary tumor. Only the carotid arteriography makes possible a diagnosis of certainty under the condition to make a bilateral study (compression being insufficient). This kind of investigation will therefore be systematic, particularly in those cases in which a sphenoid route of access is considered for the management of the expansive process of the sellar region.
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Mamo L, Houdart R, Pialoux P, Cophigon J, Narcy P, Chai N. [Diagnosis of post-injury rhinorrhea. Value of a new method of isotopic investigation]. Nouv Presse Med 1974; 3:595-6. [PMID: 4822949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Thurel C, Rey A, Thiébaut JB, Chai N, Houdart R. [Carotido-ophthalmic aneurysms]. Neurochirurgie 1974; 20:25-39. [PMID: 4843927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Mamo L, Nouel JP, Robert J, Chai N, Houdart R. Use of radioactive bleomycin to detect malignant intracranial tumors. Comparative study with technetium-99m in 104 cases. J Neurosurg 1973; 39:735-41. [PMID: 4128173 DOI: 10.3171/jns.1973.39.6.0735] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
✓ A new isotopic method for the detection of cerebral tumors using labeled bleomycin is described. In a series of 104 patients, bleomycin was found superior to technetium-99m for the diagnosis of intracranial metastatic lesions; in 50% of the cases, bleomycin revealed metastases undetected by the Tc-99m, particularly in the posterior fossa. This method also provides valuable data for the differentiation of gliomas from metastases.
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