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Chi J, Liu S, Wu Z, Shi Y, Shi C, Zhang T, Xiong B, Zeng Y, Dong X. [Retracted] circNSUN2 promotes the malignant biological behavior of colorectal cancer cells via the miR‑181a‑5p/ROCK2 axis. Oncol Rep 2024; 51:13. [PMID: 38038159 PMCID: PMC10758675 DOI: 10.3892/or.2023.8672] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/24/2020] [Indexed: 12/02/2023] Open
Abstract
Following the publication of the above article, a concerned reader drew to the Editor's attention that the data showing the results of TUNEL staining of tumours featured in the four panels of Fig. 2G on p. 4, and potentially some of the photographs of the tumours shown in Fig. 2F, were strikingly similar to data appearing in different form in another article written by different authors that had already been submitted for publication elsewhere prior to the submission of this paper to Oncology Reports. In view of the fact that certain of these data had already apparently been submitted for submission in a different journal, the Editor of Oncology Reports has decided that this paper should be retracted from the Journal. After having been in contact with the authors, they accepted the decision to retract the paper. The Editor apologizes to the readership for any inconvenience caused. [Oncology Reports 46: 142, 2021; DOI: 10.3892/or.2021.8093].
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Affiliation(s)
- Junlin Chi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Shuang Liu
- Department of Ultrasound, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Zhizhong Wu
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Yanqiang Shi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Chengmin Shi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Tong Zhang
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Binghong Xiong
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Yujian Zeng
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Xiangqian Dong
- Department of Gastroenterology, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
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Zhao J, Zheng X, Gao M, Chi J, Wei S, Yun X. Video-assisted superior mediastinal lymphadenectomy for papillary thyroid cancer: a case report. Ann R Coll Surg Engl 2022; 104:e227-e231. [PMID: 35713097 PMCID: PMC9433169 DOI: 10.1308/rcsann.2021.0104] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2020] [Indexed: 09/03/2023] Open
Abstract
Superior mediastinal lymph node metastases in papillary thyroid cancer are uncommon. The clinical characteristics and surgical strategy of superior mediastinal lymph node metastases remain unclear. Superior mediastinal lymphadenectomy can be accomplished either by a transcervical or transsternal approach. Transsternal approach for superior mediastinal lymphadenectomy can cause great damage; transcervical approach sometimes results in inadequate exposure. Here we report our experience of a papillary thyroid cancer patient with superior mediastinal lymph node metastases who underwent video-assisted superior mediastinal lymphadenectomy. A 49-year-old woman diagnosed with papillary thyroid cancer in left thyroid underwent unilateral lobectomy and ipsilateral central and lateral node dissection in the local hospital 4 years ago. Currently lymph node metastases were found in mediastinum and the right neck, some of which were adjacent to the right innominate vein. Unilateral lobectomy, ipsilateral central and lateral node dissection, and video-assisted superior mediastinal lymphadenectomy were successfully performed by transcervical approach. Subsequently, the patient received thyroxine suppression therapy and adjuvant radioiodine treatment. Video-assisted superior mediastinal lymphadenectomy, providing adequate exposure for a complete superior mediastinal lymphadenectomy, is proved to be safe and feasible.
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Affiliation(s)
- J Zhao
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin’s Clinical Research Center for Cancer, Tianjin, P. R. China
| | - X Zheng
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin’s Clinical Research Center for Cancer, Tianjin, P. R. China
| | - M Gao
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin’s Clinical Research Center for Cancer, Tianjin, P. R. China
| | - J Chi
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin’s Clinical Research Center for Cancer, Tianjin, P. R. China
| | - S Wei
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin’s Clinical Research Center for Cancer, Tianjin, P. R. China
| | - X Yun
- Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin’s Clinical Research Center for Cancer, Tianjin, P. R. China
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Nanes B, Azarova E, Bhatt K, Chi J, Isogai T, Dean K, Danuser G. 423 Keratin diversity modulates cytoskeletal dynamics and force generation during epidermal remodeling. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.05.432] [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]
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Chi J, Liu S, Wu Z, Shi Y, Shi C, Zhang T, Xiong B, Zeng Y, Dong X. circNSUN2 promotes the malignant biological behavior of colorectal cancer cells via the miR‑181a‑5p/ROCK2 axis. Oncol Rep 2021; 46:142. [PMID: 34080658 PMCID: PMC8165598 DOI: 10.3892/or.2021.8093] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/24/2020] [Indexed: 12/14/2022] Open
Abstract
Aberrant expression of circular RNAs (circRNAs) has been demonstrated to be related to the development of colorectal cancer (CRC), the third most common cancer worldwide. However, the mechanism of the effect of circRNA NOP2/Sun domain family, member 2 (circNSUN2) on the malignant biological behavior of CRC remains unclear. In the present study, the expression of circNSUN2 and microRNA (miR)‑181a‑5p was detected by RT‑qPCR. The expression of Rho‑associated coiled‑coil‑containing protein kinase 2 (ROCK2) was measured by western blotting. Cell proliferation was detected by CCK‑8 assay. The cell apoptosis rate was measured by flow cytometry. Cell migration ability was evaluated by Transwell assay. The interactions between circNSUN2, miR‑181a‑5p and ROCK2 were verified by dual‑luciferase reporter assay. The results revealed that circNSUN2 was highly expressed in CRC tissues and cell lines. Knockdown of circNSUN2 inhibited the malignant biological behavior of CRC in vivo and in vitro. Moreover, miR‑181a‑5p was revealed to be a target gene of circNSUN2, and the expression of ROCK2 was negatively regulated by miR‑181a‑5p. Knockdown of circNSUN2 inhibited proliferation and migration, and induced apoptosis of CRC cells and suppressed tumor growth by targeting miR‑181a‑5p to decrease ROCK2 expression. In conclusion, circNSUN2 promoted the progression of CRC by sponging miR‑181a‑5p to increase the expression of ROCK2.
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Affiliation(s)
- Junlin Chi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Shuang Liu
- Department of Ultrasound, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Zhizhong Wu
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Yanqiang Shi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Chengmin Shi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Tong Zhang
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Binghong Xiong
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Yujian Zeng
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
| | - Xiangqian Dong
- Department of Gastroenterology, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, P.R. China
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Nanes B, Azarova E, Chi J, Bhatt K, Isogai T, Reed D, Dean K, Danuser G. 120 Keratin switching modulates cellular mechanical properties to balance epidermal strength and plasticity. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.139] [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: 10/21/2022]
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Zhou Y, Chi J, Huang Y, Dong B, Lv W, Wang YG. Efficacy and safety of endothelin receptor antagonists in type 2 diabetic kidney disease: A systematic review and meta-analysis of randomized controlled trials. Diabet Med 2021; 38:e14411. [PMID: 33000477 DOI: 10.1111/dme.14411] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 09/10/2020] [Accepted: 09/22/2020] [Indexed: 01/01/2023]
Abstract
AIM To analyse the efficacy and safety of endothelin receptor antagonists for people with diabetic kidney disease. METHODS Randomized controlled trials comparing endothelin receptor antagonists with placebo in people with diabetic kidney disease were identified through PubMed, Embase and the Cochrane Library. We used a random-effect model to calculate the mean difference or risk ratio with the 95% CI. RESULTS Seven studies with a total of 4730 participants were included. Overall, endothelin receptor antagonists significantly reduced albuminuria compared with placebo (standardized mean difference -0.48, 95% CI -0.64 to -0.33). Atrasentan, in particular, effectively reduced albuminuria (standardized mean difference -0.58, 95% CI -1.00 to -0.17) and the risk of composite renal endpoints (risk ratio 0.65; 95% CI 0.49 to 0.88), with insignificant change in the rate of congestive heart failure (risk ratio 1.40, 95% CI 0.76 to 2.56) and mortality (risk ratio 1.11, 95% CI 0.77 to 1.61). In contrast, although avosentan reduced albuminuria (standardized mean difference -0.47, 95% CI -0.57 to -0.36) and the risk of composite renal endpoints (risk ratio 0.63, 95% CI 0.42 to 0.94), it was associated with a significant increase in congestive heart failure risk (risk ratio 2.61, 95% CI 1.36 to 5.00) and an insignificant increase in mortality risk (risk ratio 1.50, 95% CI 0.81, 2.78). No significant change in efficacy or safety outcomes with bosentan was detected. Dose-response analysis indicated that 0.75 mg/day atrasentan is expected to be optimal for renoprotection, with maximal albuminuria reduction and minimal fluid retention events. CONCLUSIONS Among the endothelin receptor antagonists, atrasentan and avosentan, but not bosentan, are effective for renoprotection in people with diabetic kidney disease. Compared with other types and doses, atrasentan 0.75 mg/day is the most promising, with maximal albuminuria reduction and minimal fluid retention. Vigilant monitoring of congestive heart failure risk is needed in future clinical practice. (PROSPERO registration no. CRD42020169840).
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Affiliation(s)
- Y Zhou
- Department of Endocrinology, Affiliated Hospital of Medical College Qingdao University, Qingdao, China
| | - J Chi
- Department of Endocrinology, Affiliated Hospital of Medical College Qingdao University, Qingdao, China
| | - Y Huang
- Department of Endocrinology, Affiliated Hospital of Medical College Qingdao University, Qingdao, China
| | - B Dong
- Department of Endocrinology, Affiliated Hospital of Medical College Qingdao University, Qingdao, China
| | - W Lv
- Department of Endocrinology, Affiliated Hospital of Medical College Qingdao University, Qingdao, China
| | - Y G Wang
- Department of Endocrinology, Affiliated Hospital of Medical College Qingdao University, Qingdao, China
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Wang G, Ye Q, Ning S, Yang Z, Chen Y, Zhang L, Huang Y, Xie F, Cheng X, Chi J, Lei Y, Guo R, Han J. LncRNA MEG3 promotes endoplasmic reticulum stress and suppresses proliferation and invasion of colorectal carcinoma cells through the MEG3/miR-103a-3p/PDHB ceRNA pathway. Neoplasma 2020; 68:362-374. [PMID: 33118833 DOI: 10.4149/neo_2020_200813n858] [Citation(s) in RCA: 12] [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: 08/13/2020] [Accepted: 09/23/2020] [Indexed: 01/05/2023]
Abstract
LncRNA maternally expressed gene 3 (MEG3) is a potential prognostic and diagnostic biomarker in colorectal carcinoma (CC). However, its cellular functions and mechanism remain not fully uncovered. Relative expression of MEG3, miRNA (miR)-103a-3p, and pyruvate dehydrogenase E1 subunit beta (PDHB) was detected by RT-qPCR and western blotting. Cell proliferation was measured by CCK-8 assay, colony formation assay, and flow cytometry, as well as xenograft tumor assay. Transwell assay examined cell invasion. Endoplasmic reticulum (ER) stress was evaluated by western blotting. Dual-luciferase reporter assay and RNA immunoprecipitation determined the relationship between miR-103a-3p and MEG3 or PDHB. Expression of MEG3 was downregulated in human CC tumor tissues and cells (SW620 and HCT116), accompanied by higher miR-103a-3p and lower PDHB. Restoring MEG3 suppressed cell viability, colony formation ability, and invasion, arrested cell cycle, and induced apoptosis rate in SW620 and HCT116 cells, as well as promoted expression of ER stress-related proteins (GRP78, ATF6, CHOP, caspase-3, and caspase-9). Furthermore, MEG3 overexpression hindered tumor growth and facilitated ER stress in vivo. Molecularly, miR-103a-3p was a target of MEG3, and further targeted PDHB. Similarly, in function, blocking miR-103a-3p suppressed CC in vitro by affecting proliferation, invasion, and ER stress; in addition, restoring miR-103a-3p partially counteracted the suppressive role of MEG3 in CC cells. MEG3 sponged miR-103a-3p to suppress CC malignancy by inducing ER stress and inhibiting cell proliferation and invasion via upregulating PDHB, suggesting a novel MEG3/miR-103a-3p/PDHB ceRNA pathway.
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Affiliation(s)
- Guoqin Wang
- Cancer Biotherapy Center, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, China
| | - Qiuwen Ye
- Department of Hepatobiliary and Pancreatic Surgery, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, China
| | - Shujuan Ning
- Department of Rehabilitation Medicine, The Third People's Hospital of Yunnan Province, Kunming, China
| | - Zhuangqing Yang
- Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, China
| | - Yunlan Chen
- Cadre Medical Division, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, China
| | - Lijuan Zhang
- Department of Palliative Medicine, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, China
| | - Youguang Huang
- Cancer Institute, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, China
| | - Fujia Xie
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Xi Cheng
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Junlin Chi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yi Lei
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Rong Guo
- Department of General Surgery, The Fifth Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jiangqiong Han
- Integrated Traditional Chinese and Western Medicine, The Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Kunming, China
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Liu J, Li J, Zeng S, Cai G, Wang Y, Chi J, Li R, Yu Y, Jiao X, Dai Y, Feng Y, Van Zandt M, Seager S, Reich C, Gao Q. Evolution of treatments for endometrial cancers: Clinical data from two national medical databases. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.619] [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]
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Cai G, Gao Y, Lu W, Zeng S, Chi J, Jiao X, Li R, Li X, Liu J, Song K, Yu Y, Dai Y, Cui B, Lv W, Kong B, Xie X, Ma D, Gao Q. Ovarian cancer and pretreatment thrombosis-associated indices: Evidence based on multicenter, retrospective, observational study. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.624] [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]
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Gao Y, Zeng S, Xiong X, Cai G, Wang Z, Xu X, Chi J, Jiao X, Liu J, Li R, Yao S, Li X, Song K, Tang J, Xing H, Yu Z, Zeng S, Zhang Q, Yi C, Kong B, Xie X, Ma D, Li X, Gao Q. A deep convolutional neural network enabled pelvic ultrasound imaging algorithm for early and accurate diagnosis of ovarian cancer. Gynecol Oncol 2020. [DOI: 10.1016/j.ygyno.2020.05.628] [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]
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Chi J, Ji YD, Shen L, Yin SN, Ding N, Chen XF, Xu DF. Low-dose CT of paediatric paranasal sinus using an ultra-low tube voltage (70 kVp) combined with the flash technique. Clin Radiol 2020; 76:77.e17-77.e21. [PMID: 32950256 DOI: 10.1016/j.crad.2020.08.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 08/20/2020] [Indexed: 10/23/2022]
Abstract
AIM To evaluate the radiation dose and diagnostic image quality of low-dose computed tomography (CT) of the paranasal sinus in children, with acquisition at an ultra-low tube voltage (70 kVp) combined with the Flash technique. MATERIALS AND METHODS Eighty paediatric patients underwent CT of the paranasal sinus and were divided into two groups according to different protocols (group A: 80 kVp protocol with conventional spiral mode [n=40] and group B: 70 kVp protocol with Flash scan mode [n=40]). For each examination, the CT dose index (CTDIvol), dose-length product (DLP), and effective dose (ED) were estimated. The image noise, signal-to-noise ratio (SNR), and overall subjective diagnostic image quality were also evaluated. RESULTS For radiation dose, the CTDIvol (mGy), DLP (mGy·cm), and ED (mSv) values of the 70 kVp protocol were significantly lower than those of the 80 kVp protocol (CTDIvol: 1.57±0.009 versus 0.39±0.004 mGy, p<0.001; DLP: 19.88±2.01 versus 6.31±0.52 mGy·cm, p<0.001; ED: 0.079±0.016 versus 0.024±0.005 mSv, p<0.001). Compared with those of the 80-kVp protocol, the image noise increased by 40.7% (p=0.113), the SNRsoft-tissue decreased by 48.9%, and the SNRbone increased by 10.1% with the 70-kVp protocol (p=0.176 and 0.227, respectively). There was no significant difference in the overall subjective image quality grades between these two groups (p=0.15). CONCLUSION When imaging the paranasal sinus in children, an ultra-low tube voltage (70 kVp) combined with the Flash CT technique can reduce the radiation dose significantly while maintaining diagnostic image quality with clinically acceptable image noise.
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Affiliation(s)
- J Chi
- Department of Radiology, First People's Hospital of Wujiang District, Wujiang, Jiangsu 215200, China
| | - Y-D Ji
- Department of Radiology, First People's Hospital of Wujiang District, Wujiang, Jiangsu 215200, China
| | - L Shen
- Department of Radiology, First People's Hospital of Wujiang District, Wujiang, Jiangsu 215200, China
| | - S-N Yin
- Department of Radiology, First People's Hospital of Wujiang District, Wujiang, Jiangsu 215200, China
| | - N Ding
- Department of Radiology, First People's Hospital of Wujiang District, Wujiang, Jiangsu 215200, China
| | - X-F Chen
- Department of Radiology, First People's Hospital of Wujiang District, Wujiang, Jiangsu 215200, China
| | - D-F Xu
- Department of Radiology, First People's Hospital of Wujiang District, Wujiang, Jiangsu 215200, China.
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Shi Y, Chi J, Wang T, Cui D, Tang X, Ding M, Li P, Zhai B. Mid-term outcome of percutaneous thermal ablation for intrahepatic recurrent hepatocellular carcinoma after liver transplantation. Clin Radiol 2019; 74:735.e1-735.e7. [DOI: 10.1016/j.crad.2019.05.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/31/2019] [Indexed: 12/13/2022]
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Chi J, Liu T, Shi C, Luo H, Wu Z, Xiong B, Liu S, Zeng Y. Long non-coding RNA LUCAT1 promotes proliferation and invasion in gastric cancer by regulating miR-134-5p/YWHAZ axis. Biomed Pharmacother 2019; 118:109201. [PMID: 31545227 DOI: 10.1016/j.biopha.2019.109201] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 06/25/2019] [Accepted: 07/02/2019] [Indexed: 01/28/2023] Open
Abstract
PURPOSE The aim of this study was to research the function of lncRNA LUCAT1 in gastric cancer. METHODS Human gastric cancer tissues and paracancer tissues were obtained from 98 patients undergoing surgical resection in our hospital. The human gastric cancer cell lines (HGC27, BGC823, MGC803, SGC7901 and AGS), and normal gastric mucosal cell line GSE1 were used to research the role of lncRNA LUCAT1. ShRNAs specifically targeting lncRNA LUCAT1, miR-134-5p mimic, miR-134-5p inhibitor and their related controls were transfected into cells. Quantitative real-time PCR was used to detect the expression of lncRNA LUCAT1, miR-134-5p and YWHAZ. The cell proliferation of SGC7901 cells was determined by CCK8 kit. Colony formation assay was undertaken. Cell apoptosis assay was processed using the Annexin V-FITC / propidium iodide (annxinV/PI) apoptosis detection kit. Migration and invasion were detected by transwell assay. Tumor xenograft model was conducted to calculate the size and weight of the tumors. Luciferase reporter assay was used to confirm the interactions among lncRNA LUCAT1, miR-134-5p and YWHAZ. RESULTS LncRNA LUCAT1 was confirmed to be highly expressed in gastric cancer. Patients with high LUCAT1 level displayed short overall survival and disease-free survival periods. LUCAT1 knockdown or miR-134-5p overexpression decreased the proliferation, colony formation, migration and invasion of SGC7901 cells. CONCLUSIONS LncRNA LUCAT1 could promote proliferation and invasion of gastric cancer by regulating miR-134-5p/YWHAZ axis.
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Affiliation(s)
- Junlin Chi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Tonglei Liu
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Chengmin Shi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Huayou Luo
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Zhizhong Wu
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Binghong Xiong
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Shuang Liu
- Department of Ultrasound, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China.
| | - Yujian Zeng
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China.
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Ding M, Tang X, Cui D, Chi J, Shi Y, Wang T, Zhai B, Li P. Clinical outcomes of ultrasound-guided radiofrequency ablation for the treatment of primary papillary thyroid microcarcinoma. Clin Radiol 2019; 74:712-717. [PMID: 31253420 DOI: 10.1016/j.crad.2019.05.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 05/20/2019] [Indexed: 01/04/2023]
Abstract
AIM To evaluate the safety, efficacy, and long-term outcomes of ultrasound-guided radiofrequency ablation (RFA) for the treatment of primary papillary thyroid microcarcinoma (PTMC). MATERIALS AND METHODS A total of 37 patients with 38 PTMC nodules underwent RFA at a power of 20 W between September 2014 and December 2017. The clinical data of these patients were reviewed retrospectively and analysed. Imaging studies of the nodules were conducted, and the patients' thyroid function was assessed before RFA; 1, 3, 6, and 12 months after RFA; and every 6 months thereafter. The volumes and volume reduction rate (VRR) of the nodules were also calculated. RESULTS RFA with a low power of 20 W was used in the treatment of 37 patients with 38 PTMC nodules. All nodules achieved complete ablation, no complications occurred, and thyroid function was not affected. During follow-up, the volume of the nodules gradually decreased. Twelve months after ablation, the mean volumes of the nodules significantly decreased to 0.01±0.03 ml with a VRR of 99.34±3.49%. At a median follow-up of 6 (range: 1-18) months, 37 of the 38 nodules were completely absorbed, and no recurrence was observed in all 37 patients. CONCLUSIONS Low-power RFA showed good safety and promising efficacy outcomes for the treatment of PTMC. In addition to surgery and active surveillance, RFA may be an alternative treatment option for patients with PTMC.
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Affiliation(s)
- M Ding
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China
| | - X Tang
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China
| | - D Cui
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China
| | - J Chi
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China
| | - Y Shi
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China
| | - T Wang
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China
| | - B Zhai
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China.
| | - P Li
- Department of Interventional Oncology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160# Pujian Road, Shanghai, 200127, China.
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Shi C, Liu T, Chi J, Luo H, Wu Z, Xiong B, Liu S, Zeng Y. LINC00339 promotes gastric cancer progression by elevating DCP1A expression via inhibiting miR-377-3p. J Cell Physiol 2019; 234:23667-23674. [PMID: 31188482 DOI: 10.1002/jcp.28934] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/21/2019] [Accepted: 05/22/2019] [Indexed: 12/14/2022]
Abstract
Up to date, the mechanism of gastric cancer (GC) development is poorly understood. This study was to demonstrate the effects of LINC00339 on GC progression. Here, we found that LINC00339 was overexpressed expressed in GC tissues and predicted poor outcome. By CCK8, colony formation and Transwell assays, we showed LINC00339 knockdown suppressed GC cell proliferation, migration, and invasion in vitro. Flow cytometry analysis (FACS) indicated that LINC00339 knockdown induced tumor cell apoptosis. Besides, we utilized the xenograft assay and found that LINC00339 depletion led to decreased tumor growth in vivo. Mechanistically, miR-377-3p was found to be inhibited by LINC00339. And LINC00339 suppressed miR-377-3p to upregulate DCP1A, which consequently promoted GC progression. In conclusion, LINC00339 promotes gastric cancer progression by elevating DCP1A expression via inhibiting miR-377-3p.
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Affiliation(s)
- Chengmin Shi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Tonglei Liu
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Junlin Chi
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Huayou Luo
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Zhizhong Wu
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Binghong Xiong
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Shuang Liu
- Department of Ultrasound, First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Yujian Zeng
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, China
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16
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Liu Y, Lin F, Fu Y, Chen W, Liu W, Chi J, Zhang X, Yin X. Cortistatin inhibits arterial calcification in rats via GSK3β/β-catenin and protein kinase C signalling but not c-Jun N-terminal kinase signalling. Acta Physiol (Oxf) 2018; 223:e13055. [PMID: 29436118 DOI: 10.1111/apha.13055] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 12/27/2022]
Abstract
AIM Cortistatin (CST) is a newly discovered endogenous active peptide that exerts protective effects on the cardiovascular system. However, the relationship between CST and aortic calcification and the underlying mechanism remain obscure. Therefore, we investigated effects of CST on aortic calcification and its signalling pathways. METHODS Calcium content and alkaline phosphatase (ALP) activity were measured using the o-cresolphthalein colorimetric method and ALP assay kit respectively. Protein expression of smooth muscle (SM)-ɑ-actin, osteocalcin (OCN), β-catenin, glycogen synthase kinase 3β (GSK3β), p-GSK3β, protein kinase C (PKC), p-PKC, c-Jun N-terminal kinase (JNK) and p-JNK was determined using Western blotting. RESULTS In aorta from a rat vitamin D3 calcification model, CST abrogated calcium deposition and pathological damage, decreased the protein expression of OCN and β-catenin and increased SM-ɑ-actin expression. In a rat cultured vascular smooth muscular cell (VSMC) calcification model induced by β-glycerophosphate (β-GP), CST inhibited the increase in ALP activity, calcium content and OCN protein and the decrease in SM-α-actin expression. CST also inhibited the β-GP-induced increase in p-GSK3β and β-catenin protein (both P < .05). The inhibitory effects of CST on ALP activity, calcium deposition and β-catenin protein were abolished by pretreatment with lithium chloride, a GSK3β inhibitor. CST promoted the protein expression of p-PKC by 68.5% (P < .01), but not p-JNK. The ability of CST to attenuate β-GP-induced increase in ALP activity, calcium content and OCN expression in the VSMC model was abolished by pretreatment with the PKC inhibitor Go6976. CONCLUSION These results indicate that CST inhibits aortic calcification and osteogenic differentiation of VSMCs likely via the GSK3β/β-catenin and PKC signalling pathways, but not JNK signalling pathway.
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Affiliation(s)
- Y. Liu
- Department of Cardiology; the First Affiliated Hospital of Harbin Medical University; Harbin China
| | - F. Lin
- Department of Comprehensive Geriatric; Mianyang Central Hospital; Mianyang China
| | - Y. Fu
- Department of Cardiology; the First Affiliated Hospital of Harbin Medical University; Harbin China
| | - W. Chen
- Department of Cardiology; the First Affiliated Hospital of Harbin Medical University; Harbin China
| | - W. Liu
- Department of Cardiology; the First Affiliated Hospital of Harbin Medical University; Harbin China
| | - J. Chi
- Department of Cardiology; the First Affiliated Hospital of Harbin Medical University; Harbin China
| | - X. Zhang
- Department of Cardiology; the First Affiliated Hospital of Harbin Medical University; Harbin China
| | - X. Yin
- Department of Cardiology; the First Affiliated Hospital of Harbin Medical University; Harbin China
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17
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Bashford-Rogers RJM, Nicolaou KA, Bartram J, Goulden NJ, Loizou L, Koumas L, Chi J, Hubank M, Kellam P, Costeas PA, Vassiliou GS. Eye on the B-ALL: B-cell receptor repertoires reveal persistence of numerous B-lymphoblastic leukemia subclones from diagnosis to relapse. Leukemia 2016; 30:2312-2321. [PMID: 27211266 PMCID: PMC5155029 DOI: 10.1038/leu.2016.142] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 05/02/2016] [Accepted: 05/12/2016] [Indexed: 02/08/2023]
Abstract
The strongest predictor of relapse in B-cell acute lymphoblastic leukemia (B-ALL) is the level of persistence of tumor cells after initial therapy. The high mutation rate of the B-cell receptor (BCR) locus allows high-resolution tracking of the architecture, evolution and clonal dynamics of B-ALL. Using longitudinal BCR repertoire sequencing, we find that the BCR undergoes an unexpectedly high level of clonal diversification in B-ALL cells through both somatic hypermutation and secondary rearrangements, which can be used for tracking the subclonal composition of the disease and detect minimal residual disease with unprecedented sensitivity. We go on to investigate clonal dynamics of B-ALL using BCR phylogenetic analyses of paired diagnosis-relapse samples and find that large numbers of small leukemic subclones present at diagnosis re-emerge at relapse alongside a dominant clone. Our findings suggest that in all informative relapsed patients, the survival of large numbers of clonogenic cells beyond initial chemotherapy is a surrogate for inherent partial chemoresistance or inadequate therapy, providing an increased opportunity for subsequent emergence of fully resistant clones. These results frame early cytoreduction as an important determinant of long-term outcome.
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Affiliation(s)
- R J M Bashford-Rogers
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, UK.,Department of Medicine, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - K A Nicolaou
- The Center for the Study of Hematological Malignancies, Nicosia, Cyprus
| | - J Bartram
- Department of Haematology, Great Ormond Street Hospital for Children, London, UK.,Genetics and Genomic Medicine Programme, UCL Institute of Child Health, London, UK
| | - N J Goulden
- Department of Haematology, Great Ormond Street Hospital for Children, London, UK
| | - L Loizou
- Pediatric Oncology/Hematology Clinic, Nicosia, Cyprus
| | - L Koumas
- The Center for the Study of Hematological Malignancies, Nicosia, Cyprus
| | - J Chi
- The Center for the Study of Hematological Malignancies, Nicosia, Cyprus
| | - M Hubank
- Genetics and Genomic Medicine Programme, UCL Institute of Child Health, London, UK
| | - P Kellam
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, UK.,Division of Infection and Immunity, Research Department of Infection, University College London, London, UK
| | - P A Costeas
- The Center for the Study of Hematological Malignancies, Nicosia, Cyprus
| | - G S Vassiliou
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, UK.,The Center for the Study of Hematological Malignancies, Nicosia, Cyprus.,Cambridge Blood and Stem Cell Biobank and Cancer Molecular Diagnosis Laboratory, Cambridge Biomedical Research Centre, Cambridge, UK
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Lin Y, Hu C, Chi J, Lin L, Yen T, Lin Y, Liou T. Effects of repetitive transcranial magnetic stimulation of the unaffected hemisphere leg motor area in patients with subacute stroke and substantial leg impairment: A pilot study. J Rehabil Med 2015; 47:305-10. [DOI: 10.2340/16501977-1943] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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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19
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Robinson T, Chi J, Dewhirst M. Hypoxia Induces mRNA 3’UTR Truncation in Multiple Cell Types In Vitro. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2373] [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]
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20
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Duan L, Ma Y, Chi J, Wang X, Wesley AJ, Chen X. The regulatory role of immunosuppressants on immune abnormalities in acute pancreatitis. Biomed Rep 2013; 2:193-198. [PMID: 24649095 DOI: 10.3892/br.2013.208] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 10/04/2013] [Indexed: 02/06/2023] Open
Abstract
The uncontrolled progression of the inflammatory cascade is the main cause underlying the development of multiple organ dysfunction syndrome (MODS) in acute pancreatitis. In this study, we investigated the effects of several immunosuppressants on mitigating the systemic inflammatory reaction syndrome (SIRS) and the compensatory anti-inflammatory response syndrome (CARS) associated with acute pancreatitis. A total of 93 male Sprague Dawley rats were divided into 5 groups: group 1 was the sham group and group 2 underwent laparoscopic intrapancreatic duct injection of sodium taurocholate to induce pancreatitis. The remaining 3 groups were the same as group 2, with the addition of methylprednisolone, cyclophosphamide or methotrexate treatment (metastab, CTX or MTX groups, respectively). Following establishment of the acute pancreatitis model, the serum levels of inflammatory and anti-inflammatory cytokines in groups 2, 3, 4 and 5 were found to be significantly elevated. Following immunosuppressant administration, the levels of all inflammatory and anti-inflammatory cytokines investigated in groups 3, 4 and 5 were decreased compared to those in group 2. The pancreatic amylase levels and pancreatic wet weight (PWW) were also decreased in groups 3, 4 and 5 compared to those in group 2. Therefore, immunosuppressants may reduce inflammation-related cytokine levels in acute pancreatitis and relieve disease progression.
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Affiliation(s)
- Ligeng Duan
- Department of General Surgery, West China Hospital, West China Medical School, University of Sichuan, Chengdu, Sichuan 610041, P.R. China
| | - Yu Ma
- Department of General Surgery, West China Hospital, West China Medical School, University of Sichuan, Chengdu, Sichuan 610041, P.R. China
| | - Junlin Chi
- Department of General Surgery, West China Hospital, West China Medical School, University of Sichuan, Chengdu, Sichuan 610041, P.R. China
| | - Xu Wang
- Department of Nursing, West China Hospital, West China Medical School, University of Sichuan, Chengdu, Sichuan 610041, P.R. China
| | - Alexander J Wesley
- Department of Surgery, Division of Transplantation, University of Cincinnati Medical Center, Cincinnati, OH 45221-0091, USA
| | - Xiaoli Chen
- Department of General Surgery, West China Hospital, West China Medical School, University of Sichuan, Chengdu, Sichuan 610041, P.R. China
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Chi J, Chiu B, Cao Y, Liu X, Wang J, Balu N, Yuan C, Xu J. Assessment of femoral artery atherosclerosis at the adductor canal using 3D black-blood MRI. Clin Radiol 2013; 68:e213-21. [DOI: 10.1016/j.crad.2012.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Revised: 12/03/2012] [Accepted: 12/07/2012] [Indexed: 10/27/2022]
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22
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Gao C, Li Y, Chi J, Lecomte P, Jerome R, Jerome C, Lei L, Li H. A novel strategy towards cyclic aliphatic (co)polyesters. EXPRESS POLYM LETT 2013. [DOI: 10.3144/expresspolymlett.2013.66] [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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23
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Chi J, Uzui H, Guo H, Ueda T, Lee JD. The role of eplerenone on activity of matrix metalloprotainase-2 stimulated by high glucose and interleukin 1 in human cardiac fibroblasts. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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25
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Chi J, Guo H, Peng F, Yang B, Liu L, Uzui H. e0358 Profibrotic influence of high glucose on human cardiac fibroblast functions. Heart 2010. [DOI: 10.1136/hrt.2010.208967.358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
The finite difference time domain (FDTD) method is a popular technique for computational electromagnetics (CEM). The large computational power often required, however, has been a limiting factor for its applications. In this paper, we will present a graphics processing unit (GPU)-based parallel FDTD solver and its successful application to the investigation of a novel B1 shimming scheme for high-field magnetic resonance imaging (MRI). The optimized shimming scheme exhibits considerably improved transmit B(1) profiles. The GPU implementation dramatically shortened the runtime of FDTD simulation of electromagnetic field compared with its CPU counterpart. The acceleration in runtime has made such investigation possible, and will pave the way for other studies of large-scale computational electromagnetic problems in modern MRI which were previously impractical.
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Affiliation(s)
- J Chi
- School of Automation Engineering, Qingdao University, China.
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27
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Herold CI, Yang I, Chi J, Sidor C, Parrillo L, Liotcheva V, Welch RA, Arnott J, Dewhirst MW, Blackwell KL. Comparative genomic and protein signatures and intratumoral treatment responses in patients with metastatic breast cancer (MBC) treated with paclitaxel (PTX) and 2-methoxyestradiol (2ME2). J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e22049] [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: 11/20/2022] Open
Abstract
e22049 Background: Tumors respond to both chemotherapy and radiation through a number of poorly understood survival mechanisms. These potential mechanisms include upregulation of anti-apoptotic and pro-angiogenic pathways, including those regulated by HIF-1α. Sequential MBC biopsies were used to examine 1) the effects of PTX on intratumoral HIF-1α mediated pathways; and 2) the ability of a HIF-1α inhibitor (2ME2) to modulate the tumor's HIF- 1α response to PTX. Methods: Key eligibility included pts with MBC, ECOG 0–2, unlimited prior therapies, and biopsiable tumors. Pts were treated on a 28-day schedule with weekly PTX (90 mg/m2 D1, D8, D15) and daily oral 2ME2 (1000, 1250,1500 or 2000 mg qid starting D8) and had 3 tumor biopsies: baseline (A); D8 post-PTX/pre-2ME2 (B); D22 post-PTX/post- 2ME2 (C). Serial biopsies were compared for genomic and single protein changes. Results: 20 pts (median age 52 yrs [31- 75]) were treated. 60% had ≥2 prior regimens for MBC, 35% had ≥3. No unexpected grade 3/4 toxicities were seen: neutropenia (n=6), anemia (2), hypophosphatemia (2), PE (1). The clinical benefit rate was 25% (4 PR, 1 SD). There were 13 pairs of tumor biopsies to compare points A/B and 10 to compare B/C. There were no consistent gene expression changes between A and B. Significant differences at C vs. B included changes in hypoxia-responsive genes (including CA9, HIF-2α) and upregulation of pro- angiogenic factors and hemoglobin transcripts. For the B/C comparison, 2 distinct groups emerged: the first (biopsy site liver) showed downregulation of gene expression programs driven by ER and the second (lymph node, breast) showed upregulation of endothelial cell- related genes. Conclusions: Combination therapy with PTX and 2ME2 is a well-tolerated and viable option for delaying disease progression for patients with heavily pretreated MBC. Significant gene expression changes before and after exposure to 2ME2 may reflect changes in tumor microcirculation consistent with the idea of vascular normalization. The potential significance of the differences in gene expression observed in the 2 distinct groups remains to be investigated. Supported by Komen Grant BCTR0504044 (MWD). [Table: see text]
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Affiliation(s)
- C. I. Herold
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - I. Yang
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - J. Chi
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - C. Sidor
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - L. Parrillo
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - V. Liotcheva
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - R. A. Welch
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - J. Arnott
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - M. W. Dewhirst
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
| | - K. L. Blackwell
- Duke University Medical Center, Durham, NC; Duke Institute for Genome Sciences and Policy, Durham, NC; EntreMed, Inc., Rockville, MD; Eastern Virginia Medical School, Norfolk, VA
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Blackwell KL, Chi J, Sidor C, Burke P, LaVallee T, Shaw HS, Liotcheva V, Sims D, Hobbs L, Arnott J, Dewhirst MW. The effects of paclitaxel (PTX) and 2-methoxyestradiol (2-ME 2) on tumor oxygenation and HIF-1α in breast cancer. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.3517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3517 Background: Radiation activates HIF-1a via a free radical mediated mechanism associated with reoxygenation. This response could be inhibited, resulting in reduced tumor vascularity and proliferation. Preclinical breast cancer models and a Phase Ib clinical trial (CT) were employed to look at the effects of chemo with or without an oral HIF-1a inhibitor, 2-ME2 (EntreMed) on tumor oxygenation and HIF-1a. Methods: Preclinical models of chemo effects on HIF-1a/oxygenation used 4T1 tumors and either doxorubicin (DOX) or cyclophosphamide (CTX). In addition, MDA-MB-231 tumors were treated with 2-ME2 (5days), and HIF-1a/MVD was assessed. In the CT, up to 15 pts with metastatic breast cancer, and biopsiable (>2 cm) non-bone sites were eligible. Tx was: D 1: PTX, 90 mg/m2; D 8: PTX, 90 mg/m2 with 2-ME2 (cohorts of 1,000/1,250/1,500 mg, qid). PTX was given 3 out of 4 wks. Bxs were done at enrollment, D8 (post-PTX), and D22 (post-PTX/2-ME2). Tumors were examined for changes in HIF-1a and CA9 levels, MVD, and genomic signatures of hypoxia. Plasma was obtained for osteoponin, PAI-1, and VEGF. Results: DOX and CTX both led to increases in HIF-1a, oxygenation, vascularity, and proliferation 4–10 days post treatment in the 4T1 model, while 2-ME2 reduced HIF-1a and MVD post treatment (5 d) in the MDA-MB-231 model. The CT opened in 6–2006, 9 pts have consented and 8 pts have undergone sequential biopsies and accrual continues. No DLT have been seen. Biopsy sites include chest wall, liver, and LN. Sufficient tissue/RNA/plasma has been obtained and the planned analyses will be presented. Conclusions: HIF-1a and tumor oxygenation appear to be modulated as a response to chemotherapy. The combination of PTX and 2-ME2 is clinically active, well-tolerated, and could serve as one of the first approaches to target HIF-1a in order to optimize therapy. Supported by Komen Grant BCTR0504044. [Table: see text]
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Affiliation(s)
- K. L. Blackwell
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - J. Chi
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - C. Sidor
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - P. Burke
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - T. LaVallee
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - H. S. Shaw
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - V. Liotcheva
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - D. Sims
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - L. Hobbs
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - J. Arnott
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
| | - M. W. Dewhirst
- Duke University Comprehensive Cancer Center, Durham, NC; Duke University IGSP, Durham, NC; EntreMed Inc, Rockville, MD
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Chi J, Liu H, Li B, Huang GL. Accumulation and biodegradation of dibutyl phthalate in Chlorella vulgaris. Bull Environ Contam Toxicol 2006; 77:21-9. [PMID: 16832751 DOI: 10.1007/s00128-006-1027-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2005] [Accepted: 05/11/2006] [Indexed: 05/10/2023]
Affiliation(s)
- J Chi
- College of Environmental Science and Engineering, Tianjin University, Tianjin 300072, People's Republic of China
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Motoya T, Thevanayagam LN, Blaschke TF, Au S, Stone JA, Jayewardene AL, Chi J, Aweeka FT. Characterization of nelfinavir binding to plasma proteins and the lack of drug displacement interactions. HIV Med 2006; 7:122-8. [PMID: 16420257 DOI: 10.1111/j.1468-1293.2006.00356.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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: 11/28/2022]
Abstract
OBJECTIVES To determine the characteristics of the binding of nelfinavir and active M8 to alpha1-acid glycoprotein (AAG) and human serum albumin (HSA), and to examine the displacement effects of drugs binding extensively to AAG (ritonavir and saquinavir) or to HSA (salicylic acid and valproic acid). METHODS Free drugs were separated by equilibrium dialysis after incubation with human plasma or purified plasma proteins and after co-incubation with potential displacers. Association constants were estimated from double-reciprocal plots of the data. RESULTS Nelfinavir and M8 free fractions [fractions of unbound drug (fus)] were 0.42+/-0.08% (mean+/-standard deviation) and 0.64+/-0.07%, respectively. For the two analytes, respectively, association constants were 7.25 x 10(7)/m and 3.33 x 10(7)/m for AAG and 1.11 x 10(6)/m and 7.92 x 10(5)/m for HSA. Nelfinavir fu in an AAG solution was significantly (P < 0.01) increased by the addition of ritonavir or saquinavir, whereas it was unaltered by addition of these drugs to whole plasma. Similarly, fu in an HSA solution was significantly increased (P < 0.01) by the addition of salicylic acid or valproic acid, whereas there was no difference in the free fraction in plasma. CONCLUSIONS The affinity of nelfinavir for human plasma proteins was higher than that of M8, and both nelfinavir and M8 showed higher affinity to AAG than to HSA. The free fraction of nelfinavir was not affected by drugs that bind extensively to AAG or albumin when these drugs were added to whole plasma in combination, suggesting a compensatory effect of alternate binding proteins.
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Affiliation(s)
- T Motoya
- Department of Clinical Pharmacy, University of California at San Francisco, San Francisco, CA 94143-0622, USA
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Chi J, Fu B, Nie W, Wang J, Graphodatsky AS, Yang F. New insights into the karyotypic relationships of Chinese muntjac (Muntiacus reevesi), forest musk deer (Moschus berezovskii) and gayal (Bos frontalis). Cytogenet Genome Res 2005; 108:310-6. [PMID: 15627750 DOI: 10.1159/000081520] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2004] [Accepted: 07/18/2004] [Indexed: 11/19/2022] Open
Abstract
To investigate the karyotypic relationships between Chinese muntjac (Muntiacus reevesi), forest musk deer (Moschus berezovskii) and gayal (Bos frontalis), a complete set of Chinese muntjac chromosome-specific painting probes has been assigned to G-banded chromosomes of these three species. Sixteen autosomal probes (i.e. 6-10, 12-22) of the Chinese muntjac each delineated one pair of conserved segments in the forest musk deer and gayal, respectively. The remaining six autosomal probes (1-5, and 11) each delineated two to five pairs of conserved segments. In total, the 22 autosomal painting probes of Chinese muntjac delineated 33 and 34 conserved chromosomal segments in the genomes of forest musk deer and gayal, respectively. The combined analysis of comparative chromosome painting and G-band comparison reveals that most interspecific homologous segments show a high degree of conservation in G-banding patterns. Eleven chromosome fissions and five chromosome fusions differentiate the karyotypes of Chinese muntjac and forest musk deer; twelve chromosome fissions and six fusions are required to convert the Chinese muntjac karyotype to that of gayal; one chromosome fission and one fusion separate the forest musk deer and gayal. The musk deer has retained a highly conserved karyotype that closely resembles the proposed ancestral pecoran karyotype but shares none of the rearrangements characteristic for the Cervidae and Bovidae. Our results substantiate that chromosomes 1-5 and 11 of Chinese muntjac originated through exclusive centromere-to-telomere fusions of ancestral acrocentric chromosomes.
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Affiliation(s)
- J Chi
- Key Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, the Chinese Academy of Sciences, Kunming, PR. China
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Lu DY, Chi J, Lin LP, Huang M, Xu B, Ding J. Effect of Anti-Cancer Drugs on the Binding of 125I-Fibrinogen to Two Leukaemia Cell Lines In Vitro. J Int Med Res 2004; 32:488-91. [PMID: 15458280 DOI: 10.1177/147323000403200505] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [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: 11/15/2022] Open
Abstract
Anti-cancer drugs may be able to inhibit tumour growth and metastasis by blocking fibrinogen- and/or fibrin-related pathways. To test this hypothesis, the effect of various anti-neoplastic drugs on the binding of 125I-Fibrinogen to two leukaemia cell lines, HL60 and P388, was investigated. All the drugs tested inhibited the binding of fibrinogen to leukaemia cells. This effect was particularly marked for drugs that act as inhibitors of protein synthesis. Since these anti-neoplastic drugs do not have anti-coagulant actions, these results provide evidence for the potential of targeting tumour fibrinogen as a new form of cancer chemotherapy.
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Affiliation(s)
- D Y Lu
- School of Life Sciences, Shanghai University, Shanghai, People's Republic of China.
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Chi J, Jayewardene A, Stone J, Gambertoglio JG, Aweeka FT. A direct determination of thymidine triphosphate concentrations without dephosphorylation in peripheral blood mononuclear cells by LC/MS/MS. J Pharm Biomed Anal 2001; 26:829-36. [PMID: 11600294 DOI: 10.1016/s0731-7085(01)00469-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 10/18/2022]
Abstract
A rapid, sensitive and specific analytical method with minimal sample preparation for the measurement of thymidine triphosphate (TTP) in peripheral blood mononuclear cells (PBMC) by LC/MS/MS has been developed. PBMC were separated from whole blood or buffy coat. The analyte and internal standard were extracted from PBMC with 70% methanol (pH 7.2). These extracts after centrifugation were directly injected onto LC/MS/MS without need for any further sample preparation. The calibration curve was linear over the range 0.8-800 ng/ml. Mean inter- and intra-assay coefficients of variation (CVs) over the range of the standard curve were less than 10%. The overall recovery of TTP was 103.5%.
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Affiliation(s)
- J Chi
- Department of Clinical Pharmacy, Drug Research Unit, School of Pharmacy, University of California, San Francisco, CA 94143-0622, USA
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Chi J, Johnson M, Harkness M. Age changes in orthodontic treatment need: a longitudinal study of 10- and 13-year-old children, using the Dental Aesthetic Index. Aust Orthod J 2000; 16:150-6. [PMID: 12476498] [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] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
The Dental Aesthetic Index (DAI) was used to assess the prevalence of unmet orthodontic treatment need in 150 13-year-old schoolchildren in Dunedin, New Zealand, and to compare the findings with those obtained in the same children at 10 years of age. Fewer 13-year-olds (27%) had a "mandatory" need of orthodontic treatment than when they were 10 years old (33%), 20% had "no/little" need for orthodontic treatment, 33% had an "elective" need for treatment and 20% had a "desirable" need for treatment. The fall in DAI scores is attributed to over-sensitivity of the Index to mixed dentition traits. When the individual scores were analysed, only 7% of the 10-year-olds were given the same scores as when they were 13 years old, 52% were given higher scores and 41% were given lower scores. This disagreement between scores was masked to a limited extent by the DAI categories: 49% of the 10-year-olds were assigned to the same DAI category at 13 years of age, 20% to a greater treatment-need category and approximately 30% to a lower treatment-need category. The DAI, in common with other malocclusion indices, is unreliable over time because it is affected by developmental changes in the occlusal traits measured.
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Kim HN, Kim SG, Lee HK, Ohrr H, Moon SK, Chi J, Lee EH, Park K, Park DJ, Lee JH, Yi SW. Incidence of presbycusis of Korean populations in Seoul, Kyunggi and Kangwon provinces. J Korean Med Sci 2000; 15:580-4. [PMID: 11068997 PMCID: PMC3054691 DOI: 10.3346/jkms.2000.15.5.580] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Presbycusis, a bilateral sensorineural hearing loss caused by changes in the inner ear, is related to multiple factors such as noise exposure and otologic disease. In institute-based studies, we tried to determine the incidence of presbycusis in Korean populations living in Seoul, Kyunggi and Kangwon provinces by gender and age groups. The subjects were people who had visited health promotion centers. Pure tone audiometry was done over 20 years on 6,028 subjects. In a community-based study, the subjects were elderly residents of Kanghwa-do area. There were no obvious factors that could cause hearing impairment in the subjects. For the pure tone audiometry, hearing threshold was obtained by using the six-dimension method. The incidence of presbycusis for subjects aged 65 years and older was 37.8% and 8.3% for > or = 27 dB HL criterion and > or = 41 dB HL criterion, respectively. The incidence increased with age. A statistically significant difference in the hearing threshold was found between men and women aged 65 years or older. No differences were found between the community-based study and the institute- based studies. There was a high incidence (about 40%) of presbycusis among Koreans aged 65 years or older (for > or = 27 dB HL criterion). With an aging population, we anticipate that this report could be used to provide a basic data for the study of presbycusis.
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Affiliation(s)
- H N Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
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36
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Chi J, Harkness M, Crowther P. A longitudinal study of orthodontic treatment need in Dunedin schoolchildren. N Z Dent J 2000; 96:4-9. [PMID: 10860373] [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] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The Index of Orthodontic Treatment Need (IOTN) was used to assess unmet orthodontic treatment need in 152 13-year-old Dunedin schoolchildren, and to compare the findings with those obtained in the same children 3 years previously. The children were randomly selected from Dunedin schools as 10-year-olds, and had not received orthodontic treatment. Approximately 86 percent of the 13-year-old children had "No-little" need for orthodontic treatment when assessed by the child-assessed Aesthetic Component (AC) and the examiner-assessed AC. Slightly less than half the children had "No-little" need for orthodontic treatment when assessed with the Dental Health Component (DHC). More 10- and 13-year-old children "Needed" orthodontic treatment with the DHC than with the AC. Both the examiner-assessed AC and the DHC assessed significantly fewer 13-year-olds as needing orthodontic treatment than the same children as 10-year-olds. Complete agreement between the grades assigned at 10 and 13 years occurred in 30-43 percent of the children and, in the treatment-need categories, between 53 percent (DHC) and 84 percent (child-assessed AC) of the children. The fall in treatment need over the 3-year period may be due to selection bias, over-sensitivity of the IOTN to mixed dentition traits, or both. Although a number of 10-year-old children were assigned different grades as 13-year-olds, many remained within the same treatment category. The apparent stability of the IOTN to assess treatment need in 10- and 13-year-old children is attributed to the grouping of different occlusal traits in the same treatment-need category, and to the small number of treatment-need categories in each component.
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Affiliation(s)
- J Chi
- Department of Oral Sciences and Orthodontics, School of Dentistry, University of Otago, Dunedin
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Chi J, Lu M, Fu B, Nakajima S, Hattori T. Induction of gastritis and gastric ulcer in Mongolian gerbils infected with Helicobacter pylori. Chin Med J (Engl) 1999; 112:998-1000. [PMID: 11721484] [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: 02/22/2023] Open
Abstract
OBJECTIVE To induce the model of Mongolian gerbil infected by Helicobacter pylori (HP) and to observe the changes of the infiltration and the proliferation of inflammatory cells before and after the bactericidal treatment. METHODS The animal model of HP infection was induced by inoculating the HP strain (American Type Culture Collection) to male Mongolian gerbil MGS/Sea (SPF). Half a month, 1 month and 3 months after inoculation, kill the animals and make HE staining and immunohistochemistry staining of the stomach to observe the pathological changes. RESULTS The infiltration of a great number of inflammatory cells was observed with the center of the mucosa of pylorus at the second week of HP infection. At the 3rd month of infection, ulcer appeared near the lesser curvature side of the pylorus. On the early stage of infection, the lesion was acute inflammation characterized by the neutrophilic infiltration, and then transformed into the chronic inflammation characterized by the lymphatic infiltration and the wide formation of lymphatic follicles. CONCLUSION Mongolian gerbil is an ideal and standard animal model of HP infection.
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Affiliation(s)
- J Chi
- Digestive Department, First Affiliated Hospital of China Medical University, Shenyang, 110001, China
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Franklin M, Chi J, McGavin C, Hockney R, Reed A, Campling G, Whale RW, Cowen PJ. Neuroendocrine evidence for dopaminergic actions of hypericum extract (LI 160) in healthy volunteers. Biol Psychiatry 1999; 46:581-4. [PMID: 10459411 DOI: 10.1016/s0006-3223(99)00102-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
BACKGROUND We studied the effect of a single dose of a formulation of a methanolic extract of Hypericum perforatum (HP), also known as St. John's wort, on plasma concentrations of growth hormone (GH), prolactin (PRL), and cortisol (CORT) in 12 healthy male volunteers. METHODS Subjects received 9 tablets of the finished product Jarsin 300 and placebo in a double-blind, balanced-order, cross-over design. RESULTS Following HP relative to placebo, there was a significant increase in plasma GH and a significant decrease in plasma PRL. Plasma CORT levels were unchanged. CONCLUSIONS Taken together with data from animal experimental studies, the findings suggest that this dose of HP may increase some aspects of brain dopamine function in humans.
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Affiliation(s)
- M Franklin
- University Department of Psychiatry, Warneford Hospital, Oxford, UK
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Cornish T, Chi J, Johnson S, Lu Y, Campanelli JT. Globular domains of agrin are functional units that collaborate to induce acetylcholine receptor clustering. J Cell Sci 1999; 112 ( Pt 8):1213-23. [PMID: 10085256 DOI: 10.1242/jcs.112.8.1213] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [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: 11/20/2022] Open
Abstract
Agrin, an extracellular matrix protein involved in neuromuscular junction formation, directs clustering of postsynaptic molecules, including acetylcholine receptors (AChRs). This activity resides entirely in the C-terminal portion of the protein, which consists of three laminin-like globular domains (G-domains: G1, G2 and G3) and four EGF-like repeats. Additionally, alternate mRNA splicing yields G-domain variants G2(0,4) with 0- or 4-amino-acid inserts, and G3(0, 8,11,19) with 0-, 8-, 11- or 19-amino-acid inserts. In order to better understand the contributions of individual domains and alternate splicing to agrin activity, single G-domains and covalently linked pairs of G-domains were expressed as soluble proteins and their AChR clustering activity measured on cultured C2 myotubes. These analyses reveal the following: (1) While only G3(8) exhibits detectable activity by itself, all G-domains studied (G1, G2(0), G2(4), G3(0) and G3(8)) enhance G3(8) activity when physically linked to G3(8). This effect is most pronounced when G2(4) is linked to G3(8) and is independent of the order of the G-domains. (2) The deletion of EGF-like repeats enhances activity. (3) Increasing the physical separation between linked G1 and G3(8) domains produces a significant increase in activity; similar alterations to linked G2 and G3(8) domains are without effect. (4) Clusters induced by two concatenated G3(8) domains are significantly smaller than all other agrin forms studied. These data suggest that agrin G-domains are the functional units which interact independently of their specific organization to yield AChR clustering. G-domain synergism resulting in biological output could be due to physical interactions between G-domains or, alternatively, independent interactions of G-domains with cell surface receptors which require spatially localized coactivation for optimal signal transduction.
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Affiliation(s)
- T Cornish
- Department of Biochemistry, Neuroscience Program, Beckman Institute, University of Illinois, Urbana, Illinois 61801, USA
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40
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Chi J, Harkness M. Elongated stylohyoid process: a report of three cases. N Z Dent J 1999; 95:11-3. [PMID: 10208079] [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] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The stylohyoid process is part of the stylohyoid chain--the styloid process, the stylohyoid ligament, and the lesser cornu of the hyoid bone. The stylohyoid chain is derived from the second branchial arch. Mineralisation of the stylohyoid ligament and ossification at the tip may increase the length of the styloid process. An elongated stylohyoid or styloid process is considered to be the source of craniofacial and cervical pain commonly known as Eagle's syndrome. In some instances the stylohyoid process may be considerably elongated, yet remain asymptomatic. This paper reports three patients with elongated stylohyoid processes discovered incidentally on routine radiographic examination.
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Affiliation(s)
- J Chi
- Department of Oral Sciences and Orthodontics, School of Dentistry, University of Otago, Dunedin
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Varanasi S, Chi J, Rogers RC, Stephens RL. Methiothepin but not methysergide antagonizes TRH effects at the dorsal vagal complex. Ann N Y Acad Sci 1998; 861:292-3. [PMID: 9928297 DOI: 10.1111/j.1749-6632.1998.tb10231.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- S Varanasi
- Department of Physiology, Ohio State University, Columbus 43210, USA
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42
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Chi J, Xu L. [A flavonoid compound in Ginkgo biloba L. leaves]. Zhongguo Zhong Yao Za Zhi 1998; 23:233-4, 256. [PMID: 11596251] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
One compound was isolated for the first time from ethyl acetate extract of Ginkgo biloba leaves and identified as kaempferol-3-O-rhamnoside by spectroscopic methods.
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Affiliation(s)
- J Chi
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050
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43
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Chi J, Xu L. [Chemical constituents of flavonoids in the leaf of Ginkgo biloba L]. Zhongguo Zhong Yao Za Zhi 1998; 23:40-1, 63. [PMID: 11243155] [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] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
A compounds were isolated from the ethyl acetate extract of Ginkgo biloba leaves for the first time and was identified as 5,7,4'-trihydroxy-flavone by spectroscopic methods.
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Affiliation(s)
- J Chi
- Institute of Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050
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Anderson RA, Cheng N, Bryden NA, Polansky MM, Cheng N, Chi J, Feng J. Elevated intakes of supplemental chromium improve glucose and insulin variables in individuals with type 2 diabetes. Diabetes 1997; 46:1786-91. [PMID: 9356027 DOI: 10.2337/diab.46.11.1786] [Citation(s) in RCA: 312] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chromium is an essential nutrient involved in normal carbohydrate and lipid metabolism. The chromium requirement is postulated to increase with increased glucose intolerance and diabetes. The objective of this study was to test the hypothesis that the elevated intake of supplemental chromium is involved in the control of type 2 diabetes. Individuals being treated for type 2 diabetes (180 men and women) were divided randomly into three groups and supplemented with: 1) placebo, 2) 1.92 micromol (100 microg) Cr as chromium picolinate two times per day, or 3) 9.6 micromol (500 microg) Cr two times per day. Subjects continued to take their normal medications and were instructed not to change their normal eating and living habits. HbA1c values improved significantly after 2 months in the group receiving 19.2 pmol (1,000 microg) Cr per day and was lower in both chromium groups after 4 months (placebo, 8.5 +/- 0.2%; 3.85 micromol Cr, 7.5 +/- 0.2%; 19.2 micromol Cr, 6.6 +/- 0.1%). Fasting glucose was lower in the 19.2-micromol group after 2 and 4 months (4-month values: placebo, 8.8 +/- 0.3 mmol/l; 19.2 micromol Cr, 7.1 +/- 0.2 mmol/l). Two-hour glucose values were also significantly lower for the subjects consuming 19.2 micromol supplemental Cr after both 2 and 4 months (4-month values: placebo, 12.3 +/- 0.4 mmo/l; 19.2 micromol Cr, 10.5 +/- 0.2 mmol/l). Fasting and 2-h insulin values decreased significantly in both groups receiving supplemental chromium after 2 and 4 months. Plasma total cholesterol also decreased after 4 months in the subjects receiving 19.2 micromol/day Cr. These data demonstrate that supplemental chromium had significant beneficial effects on HbA1c, glucose, insulin, and cholesterol variables in subjects with type 2 diabetes. The beneficial effects of chromium in individuals with diabetes were observed at levels higher than the upper limit of the Estimated Safe and Adequate Daily Dietary Intake.
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Affiliation(s)
- R A Anderson
- Beltsville Human Nutrition Research Center, U.S. Department of Agriculture, Maryland 20705-2350, USA.
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Woodruff-Pak DS, Chi J, Li YT, Pak MH, Fanelli RJ. Nimodipine ameliorates impaired eyeblink classical conditioning in older rabbits in the long-delay paradigm. Neurobiol Aging 1997; 18:641-9. [PMID: 9461062 DOI: 10.1016/s0197-4580(97)00159-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [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: 02/06/2023]
Abstract
Research using the hippocampally dependent short-conditioned stimulus trace conditioning paradigm demonstrated that nimodipine ameliorated learning deficits in older rabbits. Evidence from in vitro and in vivo measures indicated that the site of drug action was hippocampal pyramidal cells. Acquisition occurs in the long (750 ms) delay conditioning paradigm in the absence of the hippocampus. This experiment with 40 older rabbits was undertaken to determine if nimodipine ameliorates impaired acquisition in a conditioning paradigm not dependent on the hippocampus. Fifteen 90-trial sessions of paired conditioning stimuli were presented to 3 groups receiving daily injections of 0, 1, or 5 mg/kg nimodipine. Explicitly unpaired control groups received 0 or 5 mg/kg nimodipine. Acquisition with the 5 mg/kg dose was significantly faster. Existing evidence suggested that nimodipine acted in the hippocampus, but we could not rule out the possibility that the drug also affected conditioning via the cerebellum.
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Affiliation(s)
- D S Woodruff-Pak
- Department of Psychology, Temple University, Philadelphia, PA 19122, USA.
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46
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Abstract
Serotonin (5-HT) interacts with thyrotropin-releasing hormone (TRH) at the dorsal vagal complex (DVC) to augment TRH-induced stimulation of gastric acid secretion. To investigate the 5-HT receptor family involved in the augmentation response, prototypical 5-HT receptor-selective agonists (146 pmol) were coinjected with the TRH analog RX-77368 (RX; 12 pmol) into the rat DVC in a 30-nl volume. The DVC coordinates were 0.2 mm anterior, 0.2 mm right, 0.6 mm ventral with respect to the calamus scriptorius. Coinjection of RX with the 5-HT agonists 5-carboxyamidotryptamine (5-CT) or (+/-)-1-(4-iodo-2,5-dimethoxyphenyl)-2-aminopropane hydrochloride (DOI; 5-HT2 agonist) produced a 183 or 103% increase in gastric acid output compared with the RX injection alone. In contrast, coinjection of 2-methyl-5-HT (5-HT3 agonist) with RX produced no effect on RX-induced increase in gastric acid secretion. Moreover, coinjection of SC-53116 (5-HT4 agonist) decreased the gastric acid output by 45% compared with the RX response itself. Examination of the RX/5-HT agonist coinjection response in more rostral regions of the DVC using the same doses (5-CT/RX or DOI/RX) revealed that only 5-CT was effective in producing the augmented response to TRH analog. The results suggest that activation of 5-CT- or DOI-sensitive receptors augments, and of 5-HT4 receptors inhibits, the gastric acid response to TRH analog injected into the DVC. Thus the integrated response to several serotonin receptor subtypes may mediate changes to the TRH response induced by 5-HT at the DVC.
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Affiliation(s)
- S Varanasi
- Department of Physiology, College of Medicine, Ohio State University, Columbus 43210, USA
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47
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Chie WC, Liu YH, Chi J, Wu V, Chen A. Predictive factors for early menarche in Taiwan. J Formos Med Assoc 1997; 96:446-50. [PMID: 9216169] [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: 02/04/2023]
Abstract
The rapid increase of breast cancer in Taiwan has prompted the authors to evaluate the predictive factors of early menarche among contemporary Taiwanese girls. A total of 895 four-grade girls from eight elementary schools in Taipei City and County were identified as a closed cohort from the first semester of 1993. Data were collected from self-administered questionnaires and school records. A total of 799 girls who had not menstruated in the first year remained in the group through 1994. The effects of potential predictive factors were assessed by logistic regression. Among the 799 girls followed, 69 (8.6%) had first menstruation between the fourth and fifth grades. Height, weight, body mass index and maternal early onset of menarche were positively related to the onset of menarche within the preceding year. Energy consumption during exercise showed only moderate association after being adjusted for age and weight. Calorie intake from junk food was not associated with early menarche within the preceding year. Poor interpersonal family relationships and stressful life events also showed a moderate association with early menarche. The data obtained supported the hypothesis that height, weight, body mass index and maternal early menarche are positive predictive factors of early menarche. The effects of exercise and childhood stress are less prominent.
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Affiliation(s)
- W C Chie
- Department of Public Health, College of Public Health, National Taiwan University, Taipei, ROC
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48
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Chi J, Xu L, Ma C, Liu A. [Chemical constituents of the leaves of Ginkgo biloba]. Zhongguo Zhong Yao Za Zhi 1997; 22:106-7, 128. [PMID: 10743204] [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] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Four compounds were isolated from ethyl acetate extract of the leaves of Ginkgo biloba. Compounds II, III, IV were identified as ginkgolides A, B and C respectively, Compound I, which was obtained from the leaves of G. biloba for the first time, was identified as 3,3'-dimethoxy-4,4'-dihydroxy-stilbene by spectroscopic methods.
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Affiliation(s)
- J Chi
- Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing
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49
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Lepard KJ, Chi J, Mohammed JR, Gidener S, Stephens RL. Gastric antisecretory effect of serotonin: quantitation of release and site of action. Am J Physiol 1996; 271:E669-77. [PMID: 8897854 DOI: 10.1152/ajpendo.1996.271.4.e669] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Despite many reports that serotonin (5-HT) inhibits gastric acid output, the role and mechanism of action of endogenous 5-HT to modulate gastric secretion remain unclear. Vagal stimulation enhanced the basal rate of 5-HT release into both the gastric lumen (600%) and the portal circulation (265%) of the rat. The peak rate of 5-HT release into the portal circulation was 1,000-fold higher that luminal release (12 micrograms/min and 1.2 ng/min, respectively). To elucidate site(s) of action of 5-HT to inhibit acid secretion, several approaches were taken. Intraluminal perfusion of exogenous 5-HT to encompass enhanced levels seen after vagal stimulation did not reduce gastric acid output. In contrast, administration of systemic 5-HT, which raised portal venous 5-HT to similar levels as vagal stimulation, had a marked antisecretory effect. Chemical or surgical ablation of enteric or sympathetic nerves innervating the stomach did not attenuate the inhibitory effect of exogenous 5-HT on gastric acid output. The antisecretory effect of systemic 5-HT was insensitive to pretreatment with piroxicam, doxantrazole, close gastric intra-arterial sodium nitroprusside, somatostatin monoclonal antibody, or bilateral adrenalectomy. The results suggest that 5-HT is released from endogenous stores into the portal circulation in sufficient quantities after vagal stimulation to alter gastric physiology and that its action is independent of the autonomic nervous system, gastric mucosal prostaglandins or somatostatin, mucosal mast cell or adrenal constituents, or changes in gastric mucosal blood flow.
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Affiliation(s)
- K J Lepard
- Department of Physiology, College of Medicine, Ohio State University, Columbus 43210, USA
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Chi J, Kemerer J, Stephens RL. 5-HT in DVC: disparate effects on TRH analogue-stimulated gastric acid secretion, motility, and cytoprotection. Am J Physiol 1996; 271:R368-72. [PMID: 8770136 DOI: 10.1152/ajpregu.1996.271.2.r368] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Convergent evidence suggests that thyrotropin-releasing hormone (TRH) is a principal regulator of several vagally mediated gastric responses. Serotonin (5-HT) interacts with TRH in the dorsal vagal complex (DVC) to augment gastric acid secretory responses. This study investigated the ability of 5-HT to alter other gastric responses mediated by TRH administration into the DVC. Co-injection of 5-HT (7.9 pmol) and the TRH analogue RX-77368 (0.66 pmol) produced a 117% enhancement in 1-h gastric acid output compared with rats treated with RX-77368 (0.66 pmol) alone into the DVC. In contrast, coadministration of RX-77368 (4 pmol) with various doses of 5-HT (0.0048-480 pmol) was ineffective in significantly altering stimulation of gastric antral motility produced by RX-77368 (4 pmol) alone. The effect of a lower dose of DVC RX-77368 (0.66 pmol) on gastric motility was also not changed by 5-HT coadministration. Moreover, the cytoprotective effect of DVC RX-77368 (1.5 pmol) on oral ethanol-induced gastric mucosal lesions was reversed by 5-HT coadministration (54 or 18 pmol). The results suggest that activation of 5-HT receptors in the DVC can augment, not affect, and attenuate DVC TRH analogue-stimulated gastric acid secretion, antral motility, and cytoprotection, respectively.
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Affiliation(s)
- J Chi
- Department of Physiology, Ohio State University, Columbus 43210, USA
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