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Jin Y, Zhai ZW, Sun LT, Xia PD, Hu H, Jiang CQ, Zhao BC, Qu H, Qian Q, Dai Y, Yao HW, Wang ZJ, Han JG. [Construction of a model based on multipoint full-layer puncture biopsy for predicting pathological complete response after neoadjuvant therapy for locally advanced rectal cancer]. Zhonghua Wei Chang Wai Ke Za Zhi 2024; 27:403-411. [PMID: 38644246 DOI: 10.3760/cma.j.cn441530-20240101-00002] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Objective: To investigate the value of transanal multipoint full-layer puncture biopsy (TMFP) in predicting pathological complete response (pCR) after neoadjuvant radiotherapy and chemotherapy (nCRT) in patients with locally advanced rectal cancer (LARC) and to establish a predictive model for providing clinical guidance regarding the treatment of LARC. Methods: In this multicenter, prospective, cohort study, we collected data on 110 LARC patients from four hospitals between April 2020 and March 2023: Beijing Chaoyang Hospital of Capital Medical University (50 patients), Beijing Friendship Hospital of Capital Medical University (41 patients), Qilu Hospital of Shandong University (16 patients), and Zhongnan Hospital of Wuhan University (three patients). The patients had all received TMFP after completing standard nCRT. The variables studied included (1) clinicopathological characteristics; (2) clinical complete remission (cCR) and efficacy of TMFP in determining pCR after NCRT in LARC patients; and (3) hospital attended, sex, age, clinical T- and N-stages, distance between the lower margin of the tumor and the anal verge, baseline and post-radiotherapy serum carcinoembryonic antigen (CEA) and carbohydrate antigen (CA)19-9 concentrations, chemotherapy regimen, use of immunosuppressants with or without radiotherapy, radiation therapy dosage, interval between surgery and radiotherapy, surgical procedure, clinical T/N stage after radiotherapy, cCR, pathological results of TMFP, puncture method (endoscopic or percutaneous), and number and timing of punctures. Single-factor and multifactorial logistic regression analysis were used to determine the factors affecting pCR after NCRT in LARC patients. A prediction model was constructed based on the results of multivariat analysis and the performance of this model evaluated by analyzing subject work characteristics (ROC), calibration, and clinical decision-making (DCA) curves. pCR was defined as complete absence of tumor cells on microscopic examination of the surgical specimens of rectal cancer (including lymph node dissection) after NCRT, that is, ypT0+N0. cCR was defined according to the Chinese Neoadjuvant Rectal Cancer Waiting Watch Database Study Collaborative Group criteria after treatment, which specify an absence of ulceration and nodules on endoscopy; negative rectal palpation; no tumor signals on rectal MRI T2 and DWI sequences; normal serum CEA concentrations, and no evidence of recurrence on pelvic computed tomography/magnetic resonance imaging. Results: Of the 110 patients, 45 (40.9%) achieved pCR after nCRT, which was combined with immune checkpoint inhibitors in 34 (30.9%). cCR was diagnosed before puncture in 38 (34.5%) patients, 43 (39.1%) of the punctures being endoscopic. There were no complications of puncture such as enterocutaneous fistulae, vaginal injury, prostatic injury, or presacral bleeding . Only one (2.3%) patient had a small amount of blood in the stools, which was relieved by anal pressure. cCR had a sensitivity of 57.8% (26/45) for determining pCR, specificity of 81.5% (53/65), accuracy of 71.8% (79/110), positive predictive value 68.4% (26/38), and negative predictive value of 73.6% (53/72). In contrast, the sensitivity of TMFP pathology in determining pCR was 100% (45/45), specificity 66.2% (43/65), accuracy 80.0% (88/110), positive predictive value 67.2% (45/67), and negative predictive value 100.0% (43/43). In this study, the sensitivity of TMFP for pCR (100.0% vs. 57.8%, χ2=24.09, P<0.001) was significantly higher than that for cCR. However, the accuracy of pCR did not differ significantly (80.0% vs. 71.8%, χ2=2.01, P=0.156). Univariate and multivariate logistic regression analyses showed that a ≥4 cm distance between the lower edge of the tumor and the anal verge (OR=7.84, 95%CI: 1.48-41.45, P=0.015), non-cCR (OR=4.81, 95%CI: 1.39-16.69, P=0.013), and pathological diagnosis by TMFP (OR=114.29, the 95%CI: 11.07-1180.28, P<0.001) were risk factors for pCR after NCRT in LARC patients. Additionally, endoscopic puncture (OR=0.02, 95%CI: 0.05-0.77, P=0.020) was a protective factor for pCR after NCRT in LARC patients. The area under the ROC curve of the established prediction model was 0.934 (95%CI: 0.892-0.977), suggesting that the model has good discrimination. The calibration curve was relatively close to the ideal 45° reference line, indicating that the predicted values of the model were in good agreement with the actual values. A decision-making curve showed that the model had a good net clinical benefit. Conclusion: Our predictive model, which incorporates TMFP, has considerable accuracy in predicting pCR after nCRT in patients with locally advanced rectal cancer. This may provide a basis for more precisely selecting individualized therapy.
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Affiliation(s)
- Y Jin
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Z W Zhai
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - L T Sun
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - P D Xia
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - H Hu
- Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - C Q Jiang
- Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - B C Zhao
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - H Qu
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Q Qian
- Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Y Dai
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - H W Yao
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Z J Wang
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - J G Han
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
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Jiang D, Qian Q, Yang X, Zeng Y, Liu H. Machine learning based on optimal VOI of multi-sequence MR images to predict lymphovascular invasion in invasive breast cancer. Heliyon 2024; 10:e29267. [PMID: 38623213 PMCID: PMC11016709 DOI: 10.1016/j.heliyon.2024.e29267] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 03/24/2024] [Accepted: 04/03/2024] [Indexed: 04/17/2024] Open
Abstract
Objectives Lymphovascular invasion serves as a crucial prognostic indicator in invasive breast cancer, influencing treatment decisions. We aimed to develop a machine learning model utilizing optimal volumes of interest extracted from multisequence magnetic resonance images to predict lymphovascular invasion in patients with invasive breast cancer. Materials and methods This study comprised 191 patients postoperatively diagnosed with invasive breast cancer through multi-sequence magnetic resonance imaging. Independent predictors were identified through univariate and multivariate logistic regression analyses, culminating in the construction of a clinical model. Radiomic features were extracted from multi-sequence magnetic resonance imaging images across various volume of interest scales (-2 mm, entire, +2 mm, +4 mm, and +6 mm). Subsequently, various radiomic models were developed using machine learning model algorithms, including logistic regression, support vector machine, k-nearest neighbor, gradient boosting machine, classification and regression tree, and random forest. A hybrid model was then formulated, amalgamating optimal radiomic and clinical models. Results The area under the curve of the clinical model was 0.757. Among the radiomic models, the most efficient diagnosis was achieved by the k-nearest neighbor-based radiomics-volume of interest (+2 mm), resulting in an area under the curve of 0.780. The hybrid model, integrating the k-nearest neighbor-based radiomics-volume of interest (+2 mm), and the clinical model surpassed the individual clinical and radiomics models, exhibiting a superior area under the curve of 0.864. Conclusion Utilizing a hybrid approach integrating clinical data and multi-sequence magnetic resonance imaging-derived radiomics models based on the multiscale tumor region volume of interest (+2 mm) proved effective in determining lymphovascular invasion status in patients with invasive breast cancer. This innovative methodology may offer valuable insights for treatment planning and disease management.
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Affiliation(s)
- Dengke Jiang
- Department of Radiology, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, 410005, China
| | - Qiuqin Qian
- Department of Radiology, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, 410005, China
| | - Xiuqi Yang
- Department of Radiology, Xiangtan Central Hospital, Xiangtan, Hunan, 411100, China
| | - Ying Zeng
- Department of Radiology, Xiangtan Central Hospital, Xiangtan, Hunan, 411100, China
| | - Haibo Liu
- Department of Radiology, Xiangtan Central Hospital, Xiangtan, Hunan, 411100, China
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Han JG, Sun LT, Zhai ZW, Xia PD, Hu H, Zhang D, Jiang CQ, Zhao BC, Qu H, Qian Q, Dai Y, Yao HW, Wang ZJ. [The value of transanal multipoint full-layer puncture biopsy in determining the response degree of rectal cancer following neoadjuvant therapy: a prospective multicenter study]. Zhonghua Wai Ke Za Zhi 2023; 61:768-774. [PMID: 37491169 DOI: 10.3760/cma.j.cn112139-20230417-00170] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Objective: To verify the feasibility and accuracy of the transanal multipoint full-layer puncture biopsy (TMFP) technique in determining the residual status of cancer foci after neoadjuvant therapy (nCRT) in rectal cancer. Methods: Between April 2020 and November 2022, a total of 78 patients from the Beijing Chaoyang Hospital of Capital Medical University, the Beijing Friendship Hospital of Capital Medical University, the Qilu Hospital of Shandong University, the Zhongnan Hospital of Wuhan University with advanced rectal cancer received TMFP after nCRT participated in this prospective multicenter trial. There were 53 males and 25 females, aged (M(IQR)) 61 (13) years (range: 35 to 77 years). The tumor distance from the anal verge was 5 (3) cm (range: 2 to 10 cm). The waiting time between nCRT and TMFP was 73 (26) days (range: 33 to 330 days). 13-point transanal puncture was performed with a 16 G tissue biopsy needle with the residual lesion as the center. The specimens were submitted for independent examination and the complications of the puncture were recorded. The consistency of TMFP and radical operation specimen was compared. The consistency of TMPF with clinical remission rates for the diagnosis of complete pathological remission was compared by sensitivity, specificity, negative predictive value, positive predictive value and accuracy. Statistical analysis between groups was performed using the χ2 analysis, and a paired χ2 test was used to compare diagnostic validity. Results: Before TMFP, clinical complete response (cCR) was evaluated in 27 cases. Thirty-six cases received in vivo puncture, the number of punctures in each patient was 13 (8) (range: 4 to 20), 24 cases of tumor residue were found in the puncture specimens. The sensitivity to judgment (100% vs. 60%, χ2=17.500, P<0.01) and accuracy (88.5% vs. 74.4%, χ2=5.125, P=0.024) of TMFP for the pathologic complete response (pCR) were significantly higher than those of cCR. Implement TMFP based on cCR judgment, the accuracy increased from 74.4% to 92.6% (χ2=4.026, P=0.045). The accuracy of the in vivo puncture was 94.4%, which was 83.3% of the in vitro puncture (χ2=1.382, P=0.240). Overall, the accuracy of TMFP improved gradually with an increasing number of cases (χ2=7.112, P=0.029). Conclusion: TMFP is safe and feasible, which improves the sensitivity and accuracy of rectal cancer pCR determination after nCRT, provides a pathological basis for cCR determination, and contributes to the safe development of the watch and wait policy.
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Affiliation(s)
- J G Han
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - L T Sun
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Z W Zhai
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - P D Xia
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - H Hu
- Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - D Zhang
- Department of Clinical Epidemiology Laboratory, Beijing Institute of Respiratory Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - C Q Jiang
- Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - B C Zhao
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - H Qu
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Q Qian
- Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Y Dai
- Department of General Surgery, Qilu Hospital of Shandong University, Jinan 250012, China
| | - H W Yao
- Department of General Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Z J Wang
- Department of General Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
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von der Leyen MW, Holloway J, Ma Y, Campbell PT, Aboushelbaya R, Qian Q, Antoine AF, Balcazar M, Cardarelli J, Feng Q, Fitzgarrald R, Hou BX, Kalinchenko G, Latham J, Maksimchuk AM, McKelvey A, Nees J, Ouatu I, Paddock RW, Spiers B, Thomas AGR, Timmis R, Krushelnick K, Norreys PA. Observation of Monoenergetic Electrons from Two-Pulse Ionization Injection in Quasilinear Laser Wakefields. Phys Rev Lett 2023; 130:105002. [PMID: 36962018 DOI: 10.1103/physrevlett.130.105002] [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] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/31/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
The generation of low emittance electron beams from laser-driven wakefields is crucial for the development of compact x-ray sources. Here, we show new results for the injection and acceleration of quasimonoenergetic electron beams in low amplitude wakefields experimentally and using simulations. This is achieved by using two laser pulses decoupling the wakefield generation from the electron trapping via ionization injection. The injection duration, which affects the beam charge and energy spread, is found to be tunable by adjusting the relative pulse delay. By changing the polarization of the injector pulse, reducing the ionization volume, the electron spectra of the accelerated electron bunches are improved.
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Affiliation(s)
- M W von der Leyen
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
- John Adams Institute for Accelerator Science, Denys Wilkinson Building, Oxford OX1 3RH, United Kingdom
| | - J Holloway
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Y Ma
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - P T Campbell
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - R Aboushelbaya
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - Q Qian
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A F Antoine
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M Balcazar
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - J Cardarelli
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Q Feng
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - R Fitzgarrald
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - B X Hou
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - G Kalinchenko
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - J Latham
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A M Maksimchuk
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A McKelvey
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - J Nees
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - I Ouatu
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - R W Paddock
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - B Spiers
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - A G R Thomas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - R Timmis
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - K Krushelnick
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - P A Norreys
- Department of Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
- John Adams Institute for Accelerator Science, Denys Wilkinson Building, Oxford OX1 3RH, United Kingdom
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Didcot, OX11 0QX, United Kingdom
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Zhang K, Qian Q, Mao Y, Xu Y, Yang Y, Chen Y, Wang X. Characterization of growth phenotypes and gastrointestinal tract microbiota in sheep fed with caragana. J Appl Microbiol 2021; 131:2763-2779. [PMID: 33998744 DOI: 10.1111/jam.15138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 03/09/2021] [Revised: 04/22/2021] [Accepted: 05/10/2021] [Indexed: 01/15/2023]
Abstract
AIMS Using high-protein caragana as an unconventional feed supplement has promising application potential in livestock feeding programmes, and verifying its function is of great importance to guide efficient dietary management of livestock. METHODS AND RESULTS This study investigated the resulting changes in the growth, slaughter performance, serum physiological index, physical and chemical characteristics of meat, ruminal and intestine morphology and gastrointestinal tract microbiota in sheep fed with caragana (CAR), corn straw (COR) and alfalfa (ALF) diets. The CAR group showed an increased abundance of Christensenellaceae R-7 group, Marvinbryantia, Ruminococcaceae NK4A214, Lachnospiraceae UCG-002 and Desulfuromonas in the rumen compared with ALF, and CAR group mainly enhanced starch and sucrose metabolism, fructose and mannose metabolism, photosynthesis and d-alanine metabolism in the rumen compared with ALF. CONCLUSIONS CAR diet positively changed the fatty acid profile of longissimus dorsi muscle and significantly altered the composition and function of the microbiota in the rumen, ileum and cecum. SIGNIFICANCE AND IMPACT OF THE STUDY This study systematically demonstrated the feasibility of CAR as an alternative to ALF for animal fattening in a complete formula granulated feed and provided a fundamental basis for further research and development of CAR as an unconventional feed source for ruminants.
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Affiliation(s)
- K Zhang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Q Qian
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Y Mao
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Y Xu
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Y Yang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Y Chen
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - X Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, China
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Dai J, Zhuang Y, Tang M, Qian Q, Chen JP. CircRNA UBAP2 facilitates the progression of colorectal cancer by regulating miR-199a/VEGFA pathway. Eur Rev Med Pharmacol Sci 2021; 24:7963-7971. [PMID: 32767322 DOI: 10.26355/eurrev_202008_22479] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The aim of this study is to explore the regulatory mechanism of circRNA UBAP2 (circUBAP2) in colorectal cancer (CRC). PATIENTS AND METHODS The expression levels of circUBAP2, miR-199a, and VEGFA in tissues and cell lines were detected by RT-qPCR. The cell proliferation was examined by CCK-8 and colony formation assays. The migration and invasion abilities were evaluated by wound healing and transwell assays, respectively. Bioinformatics analysis and Luciferase activity assay were applied to determine the interaction between genes. RESULTS The expression of circUBAP2 was upregulated in CRC tissues and cell lines, and depletion of circUBAP2 suppressed the cell proliferation, migration, and invasion of CRC. Furthermore, miR-199a inhibitor abrogated the suppressive effect of circUBAP2 knockdown on CRC progression. Vascular endothelial growth factor A (VEGFA) was identified as a downstream target gene of miR-199a, and overexpression of VEGFA rescued the tumor phenotypes attenuated by circUBAP2 knockdown or miR-199a overexpression. CONCLUSIONS Our findings demonstrated that circUBAP2 facilitated CRC progression by sponging miR-199a to upregulate VEGFA. These findings implied that circUBAP2 may be a potential therapeutic biomarker for CRC.
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Affiliation(s)
- J Dai
- Department of Gastroenterology, the Third Affiliated Hospital of Soochow University, Changzhou, P.R. China.
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Li M, Jia H, Qian Q, Wen P, Chen C, Hua Y, Wang K, Zhang W, Shi F. Genomic characterization of high-recurrence risk papillary thyroid carcinoma in a southern Chinese population. Diagn Pathol 2020; 15:49. [PMID: 32393293 PMCID: PMC7212670 DOI: 10.1186/s13000-020-00962-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 04/28/2020] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND The objective of this study was to investigate genetic variations and the relationships between these genetic variations and clinicopathological features of high-recurrence risk papillary thyroid carcinoma in a southern Chinese population. METHODS One hundred sixty-eight patients of high-recurrence risk papillary thyroid carcinoma were recruited for this study from 2017 to 2018. Formalin-fixed paraffin-embedded tissue and the data of clinicopathological characteristics were all collected and analyzed from these patients. We used next-generation sequencing technology to investigate the targeted gene mutations and gene fusions of the pathology specimens. RESULTS The frequency of candidate tumor driver gene mutation was 85.1% in 143 patients, including BRAF V600E mutation in 119 patients(70.8%), RET fusion in 13 patients(7.7%), TERT promoter mutations in 11 patients(6.5%), RAS (HRAS, NRAS, KRAS) gene mutations in 10 patients(6.0%), and other mutations involving TP53, PIK3CA, AKT1, PTEN and NTRK1. Concomitant presence of more than two genetic aberrations was seen in 27 patients (16.1%). Our study showed that BRAF V600E mutation is highly correlated with conventional PTC (p < 0.001), BRAF V600E and TERT promoter mutation duet was associated with older patient age (> 45, p = 0.003) and higher disease stage of III or IV (p = 0.002). RAS gene and BRAF V600E co-mutations were only seen in multifocal PTC (p = 0.015). CONCLUSION In our high-recurrence risk PTC cohort, most patients had more than one driver gene aberration. Coexistence of BRAF V600E with TERT promoter mutations or with RAS mutations were significantly correlated with worse clinicopathological characteristics.
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Affiliation(s)
- Min Li
- Department of Nuclear Medicine, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, and Hunan Cancer Hospital, Changsha, 410013, China
| | - Haitao Jia
- Shenzhen Cheerland Biotechnology Co., Ltd, Shenzhen, 518055, China
| | - Qiuqin Qian
- Department of Nuclear Medicine, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, and Hunan Cancer Hospital, Changsha, 410013, China
| | - Peng Wen
- Department of Nuclear Medicine, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, and Hunan Cancer Hospital, Changsha, 410013, China
| | - Chuan Chen
- Shenzhen Cheerland Biotechnology Co., Ltd, Shenzhen, 518055, China
| | - Yaqiong Hua
- Shenzhen Cheerland Biotechnology Co., Ltd, Shenzhen, 518055, China
| | - Kai Wang
- Shenzhen Cheerland Biotechnology Co., Ltd, Shenzhen, 518055, China
| | - Wenyong Zhang
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Feng Shi
- Department of Nuclear Medicine, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, and Hunan Cancer Hospital, Changsha, 410013, China.
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Liu X, He X, Chen Z, Du S, Yang Y, Shu Y, Li G, Hu Y, Tong R, Li G, Qian Q. SAT-186 Extra-potassium Load from Commonly Used Traditional Chinese Medicines Was an Urgent Problem for CKD Patients. Kidney Int Rep 2020. [DOI: 10.1016/j.ekir.2020.02.198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Xu F, Zhang YC, Hu H, Xu M, Huang MF, Qian Q, Jiang CQ, Ding Z. [Analysis on the efficacy and safety of reconstruction of mesenteric superior and inferior artery to increase the blood supply of ileal type D pouch]. Zhonghua Wei Chang Wai Ke Za Zhi 2020; 23:83-86. [PMID: 31958937 DOI: 10.3760/cma.j.issn.1671-0274.2020.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Wu Y, Shi X, Li Y, Shi X, Gu Y, Qian Q, Hong Y. Hematopoietic and lymphatic cancers in patients with periodontitis: a systematic review and meta-analysis. Med Oral Patol Oral Cir Bucal 2020; 25:e21-e28. [PMID: 31880294 PMCID: PMC6982994 DOI: 10.4317/medoral.23166] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 09/16/2019] [Indexed: 12/19/2022] Open
Abstract
Background Numerous studies have explored the correlation of periodontal disease (PD) with risk of hematopoietic and lymphatic cancers, but the findings were inconsistent. Therefore, we did a meta-analysis to ascertain the correlation of PD with risk of incident hematopoietic and lymphatic cancers.
Material and Methods The authors searched relevant studies in databases (PubMed, Web of Science, and MEDLINE). The summary relative risk (RR) along with 95% confidence interval (CI) was calculated by use of random or fixed effects models.
Results Six studies were included in qualitative synthesis. The pooled analysis revealed that PD was significantly associated with an increased risk of hematopoietic and lymphatic cancers (RR = 1.17; 95% CI = 1.07–1.27; P = 0). Stratified analysis showed the association of PD with hematopoietic and lymphatic cancers remained significant in the never smokers (RR = 1.28; 95% CI = 1.07–1.54; P = 0.007), and in the American population (RR = 1.17; 95% CI = 1.05–1.30; P = 0.003), respectively.
Conclusions Never smokers population and the American population with PD have a higher risk of developing hematopoietic and lymphatic cancers. PD might be considered as a risk factor for hematopoietic and lymphatic cancers. Key words:Periodontal disease, hematopoietic and lymphatic cancer, meta-analysis, systematic review.
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Affiliation(s)
- Y Wu
- National Institute of Clinical Research The Fifth People's Hospital of Shanghai, Fudan University 128 Ruili Road, Minhang District Shanghai 200240, China
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12
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Zhou Y, Jiang CQ, Qian Q, Zhang W, Wang XW, Zhang L, Yu XQ, Ding Z, Gong ZL, You SP. [A rare case of spontaneous transvaginal evisceration]. Zhonghua Wei Chang Wai Ke Za Zhi 2019; 22:1085-1086. [PMID: 31770841 DOI: 10.3760/cma.j.issn.1671-0274.2019.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Jiao Q, Qian Q, Liu C, Luo Y, Fang F, Wang M, Ji J, Qian H, Zhang X, Maurer M. T helper 22 cells from Han Chinese patients with atopic dermatitis exhibit high expression of inducible T‐cell costimulator. Br J Dermatol 2019; 182:648-657. [PMID: 31090221 DOI: 10.1111/bjd.18040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Q. Jiao
- Department of Dermatology The First Affiliated Hospital of Soochow University Shizi Road 188 Suzhou 215006 China
- Department of Dermatology and Allergy Charité–Universitätsmedizin Berlin Charitéplatz 1 Berlin 10117 Germany
| | - Q. Qian
- Department of Dermatology The First Affiliated Hospital of Soochow University Shizi Road 188 Suzhou 215006 China
| | - C. Liu
- Department of Dermatology The First Affiliated Hospital of Soochow University Shizi Road 188 Suzhou 215006 China
- Jiangsu Institute of Clinical Immunology & Jiangsu Key Laboratory of Clinical Immunology, The First Affiliated Hospital of Soochow University, Shizi Road 188 Suzhou 215006 China
| | - Y. Luo
- Department of Dermatology and Allergy Charité–Universitätsmedizin Berlin Charitéplatz 1 Berlin 10117 Germany
| | - F. Fang
- Department of Dermatology The First Affiliated Hospital of Soochow University Shizi Road 188 Suzhou 215006 China
| | - M. Wang
- Department of Dermatology The First Affiliated Hospital of Soochow University Shizi Road 188 Suzhou 215006 China
| | - J. Ji
- Department of Dermatology The Second Affiliated Hospital of Soochow University Sanxiang Road 1055 Su Zhou 215004 China
| | - H. Qian
- Department of Dermatology Children's Hospital of Soochow University Jingde Road 303 Suzhou 215000 China
| | - X. Zhang
- Department of Dermatology The First Affiliated Hospital of Soochow University Shizi Road 188 Suzhou 215006 China
- Jiangsu Institute of Clinical Immunology & Jiangsu Key Laboratory of Clinical Immunology, The First Affiliated Hospital of Soochow University, Shizi Road 188 Suzhou 215006 China
| | - M. Maurer
- Department of Dermatology and Allergy Charité–Universitätsmedizin Berlin Charitéplatz 1 Berlin 10117 Germany
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Feng X, Yang M, Yang Z, Qian Q, Burns EM, Min W. Abnormal expression of the co‐stimulatory molecule B7‐H3 in lichen simplex chronicus is associated with expansion of Langerhans cells. Clin Exp Dermatol 2019; 45:30-35. [PMID: 31056761 DOI: 10.1111/ced.14001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/30/2019] [Indexed: 12/15/2022]
Affiliation(s)
- X. Feng
- Department of Dermatology The First Affiliated Hospital of Soochow University Suzhou China
| | - M. Yang
- Department of Dermatology The First Affiliated Hospital of Soochow University Suzhou China
| | - Z. Yang
- Department of Dermatology The First Affiliated Hospital of Soochow University Suzhou China
| | - Q. Qian
- Department of Dermatology The First Affiliated Hospital of Soochow University Suzhou China
| | - E. M. Burns
- Department of Dermatology University of Alabama at Birmingham Birmingham AL USA
| | - W. Min
- Department of Dermatology The First Affiliated Hospital of Soochow University Suzhou China
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15
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Cheng H, Zhou Y, Mironov AE, Wang W, Qiao T, Lin W, Qian Q, Xu S, Yang Z, Eden JG. Mode suppression of 53 dB and pulse repetition rates of 2.87 and 36.4 GHz in a compact, mode-locked fiber laser comprising coupled Fabry-Perot cavities of low finesse (F = 2). Opt Express 2017; 25:24400-24409. [PMID: 29041385 DOI: 10.1364/oe.25.024400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 08/29/2017] [Indexed: 06/07/2023]
Abstract
Multiplication of the pulse repetition frequency (PRF) of a compact, mode-locked fiber laser by a factor as large as 25 has been achieved with two coupled Fabry-Perot (FP) resonators of low finesse (F = 2). Reducing the FP finesse by at least two orders of magnitude, relative to previous pulse frequency multiplication architectures, has the effect of stabilizing the oscillator with respect to pulse-to-pulse amplitude, dropped pulses, and other effects of cavity detuning. Coupling two Fabry-Perot cavities, each encompassing a 3.3-3.6 cm length of fiber, in a hybrid geometry resembling that of the coupled-cavity laser interferometer has yielded side mode suppressions ≥ 50 dB while simultaneously doubling the laser PRF to 2.87 GHz. Pulses approximately 3.9 ps in duration (FWHM) are emitted at intervals of 27.5 ps, and in groups (bursts) of pulses separated by 350 ps. Thus, the PRF within the pulse bursts is 36 GHz, a factor of 25 greater than the free spectral range for a conventional mode-locked cavity having a length of 6.9 cm. Experimental data are in accord with simulations of the phase coherence and temporal behavior of the mode-locked pulses.
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Huang YC, Chen X, Wang C, Peng L, Qian Q, Wang SF. Layer-dependent electronic properties of phosphorene-like materials and phosphorene-based van der Waals heterostructures. Nanoscale 2017; 9:8616-8622. [PMID: 28489111 DOI: 10.1039/c7nr01952a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Black phosphorus is a layered semiconducting allotrope of phosphorus with high carrier mobility. Its monolayer form, phosphorene, is an extremely fashionable two-dimensional material which has promising potential in transistors, optoelectronics and electronics. However, phosphorene-like analogues, especially phosphorene-based heterostructures and their layer-controlled electronic properties, are rarely systematically investigated. In this paper, the layer-dependent structural and electronic properties of phosphorene-like materials, i.e., mono- and few-layer MXs (M = Sn, Ge; X = S, Se), are first studied via first-principles calculations, and then the band edge position of these MXs as well as mono- and few-layer phosphorene are aligned. It is revealed that van der Waals heterostructures with a Moiré superstructure formed by mutual coupling among MXs and among MXs and few-layer phosphorene are able to show type-I or type-II characteristics and a I-II or II-I transition can be induced by adjusting the number of layers. Our work is expected to yield a new family of phosphorene-based semiconductor heterostructures with tunable electronic properties through altering the number of layers of the composite.
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Affiliation(s)
- Y C Huang
- Center for Nano Science and Technology, College of Chemistry and Material Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, 241000, People's Republic of China.
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Jiao Q, Liu C, Li W, Li W, Fang F, Qian Q, Zhang X. Programmed death-1 ligands 1 and 2 expression in cutaneous squamous cell carcinoma and their relationship with tumour- infiltrating dendritic cells. Clin Exp Immunol 2017; 188:420-429. [PMID: 28052400 DOI: 10.1111/cei.12921] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2016] [Indexed: 01/01/2023] Open
Abstract
The programmed death-1 (PD-1) receptor ligands, PD-L1 and PD-L2, are co-stimulatory molecules that contribute to the negative regulation of T lymphocyte activation. It is still unclear whether there is correlation between PD-L1 or PD-L2 and tumour-infiltrating dendritic cells (TIDCs) in cutaneous squamous cell carcinoma (CSCC). The aim of this study was to analyse PD-L1 and PD-L2 expression and dendritic cells infiltration in tumour tissue of CSCC patients and investigate their clinical significance. Immunohistochemical analysis was used to evaluate the expression of PD-L1, PD-L2, CD1a and CD83 in 61 CSCC tissues. The immunofluoresence double-labelling technique was performed to detect the co-expression of PD-L1 or PD-L2 and CD1a or CD83 in tumour tissues. We found that 25 of 61 cases CSCC (40·98%) exhibited positivity for PD-L1, whereas 37 of 61 cases CSCC (60·66%) exhibited positivity for PD-L2. A higher percentage of CD1a-positive cases were observed on both PD-L1-positive and PD-L2-positive specimens compared with that of CD83-positive cases (92·29% versus 37·60%, 83·20% versus 33·16%). The expression of PD-L1 and PD-L2 on CD1a+ cells was significantly higher than that on CD83+ cells in tumour tissues of CSCC patients. Furthermore, the expression rate of PD-L1 was associated with UICC stage, and the expression rate of PD-L2 was associated with predominant differentiation and tumour size in CSCC. Our results indicated that higher expression of PD-L1 and PD-L2 on CD1a+ cells than that on CD83+ cells in CSCC tumour tissues may contribute to negative regulation in anti-tumour immune responses.
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Affiliation(s)
- Q Jiao
- Department of Dermatology, First Affiliated Hospital, Soochow University, Suzhou, China
| | - C Liu
- Department of Dermatology, First Affiliated Hospital, Soochow University, Suzhou, China.,Department of Clinical Immunology Laboratory, First Affiliated Hospital, Soochow University, Suzhou, China
| | - W Li
- Biomedical Research Center, University of Rostock, Rostock, Germany
| | - W Li
- Department of Dermatology, Soochow University Affiliated Children's Hospital, Suzhou, China
| | - F Fang
- Department of Dermatology, First Affiliated Hospital, Soochow University, Suzhou, China
| | - Q Qian
- Department of Dermatology, First Affiliated Hospital, Soochow University, Suzhou, China
| | - X Zhang
- Department of Dermatology, First Affiliated Hospital, Soochow University, Suzhou, China.,Department of Clinical Immunology Laboratory, First Affiliated Hospital, Soochow University, Suzhou, China
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Jin J, Liu L, Gao Q, Chan RCK, Li H, Chen Y, Wang Y, Qian Q. The divergent impact ofCOMTVal158Met on executive function in children with and without attention-deficit/hyperactivity disorder. Genes, Brain and Behavior 2016; 15:271-9. [DOI: 10.1111/gbb.12270] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 10/28/2015] [Accepted: 11/03/2015] [Indexed: 12/30/2022]
Affiliation(s)
- J. Jin
- Peking University Sixth Hospital/Institute of Mental Health
- National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital)
- Key Laboratory of Mental Health; Ministry of Health (Peking University)
| | - L. Liu
- Peking University Sixth Hospital/Institute of Mental Health
- National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital)
- Key Laboratory of Mental Health; Ministry of Health (Peking University)
| | - Q. Gao
- Peking University Sixth Hospital/Institute of Mental Health
- National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital)
- Key Laboratory of Mental Health; Ministry of Health (Peking University)
| | - R. C. K. Chan
- Neuropsychology and Applied Cognitive Neuroscience Laboratory, Key Laboratory of Mental Health, Institute of Psychology; Chinese Academy of Sciences; Beijing China
| | - H. Li
- Peking University Sixth Hospital/Institute of Mental Health
- National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital)
- Key Laboratory of Mental Health; Ministry of Health (Peking University)
| | - Y. Chen
- Peking University Sixth Hospital/Institute of Mental Health
- National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital)
- Key Laboratory of Mental Health; Ministry of Health (Peking University)
| | - Y. Wang
- Peking University Sixth Hospital/Institute of Mental Health
- National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital)
- Key Laboratory of Mental Health; Ministry of Health (Peking University)
| | - Q. Qian
- Peking University Sixth Hospital/Institute of Mental Health
- National Clinical Research Center for Mental Disorders (Peking University Sixth Hospital)
- Key Laboratory of Mental Health; Ministry of Health (Peking University)
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Abstract
Temperature is a key environmental factor in determining the population size of Cnaphalocrocis medinalis in summer. High temperatures inhibit survival, development and fecundity of this insect. However, biological responses of female and male adults to heat shock, and physiological mechanism of high temperature suppressing population development are still ambiguous. We experimentally tested the impact of heat shock (5 h day-1) on biological traits, spermatogenesis and sperm transfer of adults of C. medinalis. The result showed that heat exposure to 39 and 40 °C for 5 h reduced longevity and copulation frequency of adults, and hatchability of eggs. Immediate survival rate of males was lower than that of females after 3 days of exposure to 41 °C. The oviposition period, copulation frequency, fecundity of adults and hatchability of eggs were significantly lower when male adults were exposed to 40 or 41 °C for 3 days. Heat shock decreased frequency and success rate of mating when males were exposed, and it also resulted in postponement of mating behaviour and prolongation of mating duration as both the female and male adults were exposed. Heat shock did not affect spermatogenesis, but significantly inhibited sperms maturation. Moreover, males could not ejaculate sperm into females during copulation when these male moths received heat shock. Heat shock remarkably suppressed mating behaviour and sperm transfer, which led to a dramatic decline of rice leaf folder populations.
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Affiliation(s)
- H J Liao
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
| | - Q Qian
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
| | - X D Liu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Entomology, Nanjing Agricultural University, Nanjing 210095, China
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Qian Q, Li X, Huang X, Fu M, Meng Z, Chen M, Feng B. Glucose metabolism among residents in Shanghai: natural outcome of a 5-year follow-up study. J Endocrinol Invest 2012; 35:453-8. [PMID: 21738002 DOI: 10.3275/7854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Previous studies have shown that Type 2 diabetes mellitus (T2DM) is usually preceded by a condition known as pre-diabetes. However, few studies evaluate the rate of each status of impaired glucose regulation progressed to T2DM and its related metabolic disorders impacting the development. AIM To investigate the natural outcome of glucose metabolism among Shanghai adult residents during a 5-yr period, and estimate the metabolic characteristics related with the conversion of glucose tolerance. SUBJECTS AND METHODS A cross-sectional survey with multiple- stage and random sampling was conducted among 1869 adult residents from Shanghai Pudong New District in 2002. In 2007, 1042 non-diabetic subjects were successfully followed up. All the participants completed a questionnaire and underwent anthropometric measurements and a 75-g oral glucose tolerance test. RESULTS The incidence of diabetes was higher in isolated impaired glucose tolerance (i- IGT), isolated impaired fasting glucose (i-IFG), and combined fasting and post-prandial hyperglycemia (IFG/IGT) group when compared to that in normal glucose tolerance group, as relative ratios with 95% confidence intervals of 9.2 (5.5- 15.2), 7.5 (3.6-15.7), and 13.2 (5.8-30.2), respectively. Subjects who had 2 or more metabolic disorders had a 2-3-fold higher incidence than those with less than 1 metabolic disorder (all p<0.001). CONCLUSIONS People with pre-diabetes are at increased risk of diabetes, suggesting the need for frequent screening in theloe people with several metabolic disorders.
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Affiliation(s)
- Q Qian
- Department of Endocrinology and Metabolism, Shanghai East Hospital, Tongji University, 150 Ji-mo Rd., Shanghai 200120, China
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Sokaras D, Nordlund D, Weng TC, Mori RA, Velikov P, Wenger D, Garachtchenko A, George M, Borzenets V, Johnson B, Qian Q, Rabedeau T, Bergmann U. A high resolution and large solid angle x-ray Raman spectroscopy end-station at the Stanford Synchrotron Radiation Lightsource. Rev Sci Instrum 2012; 83:043112. [PMID: 22559520 PMCID: PMC4108631 DOI: 10.1063/1.4704458] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Accepted: 04/02/2012] [Indexed: 05/29/2023]
Abstract
We present a new x-ray Raman spectroscopy end-station recently developed, installed, and operated at the Stanford Synchrotron Radiation Lightsource. The end-station is located at wiggler beamline 6-2 equipped with two monochromators-Si(111) and Si(311) as well as collimating and focusing optics. It consists of two multi-crystal Johann type spectrometers arranged on intersecting Rowland circles of 1 m diameter. The first one, positioned at the forward scattering angles (low-q), consists of 40 spherically bent and diced Si(110) crystals with 100 mm diameters providing about 1.9% of 4π sr solid angle of detection. When operated in the (440) order in combination with the Si (311) monochromator, an overall energy resolution of 270 meV is obtained at 6462.20 eV. The second spectrometer, consisting of 14 spherically bent Si(110) crystal analyzers (not diced), is positioned at the backward scattering angles (high-q) enabling the study of non-dipole transitions. The solid angle of this spectrometer is about 0.9% of 4π sr, with a combined energy resolution of 600 meV using the Si (311) monochromator. These features exceed the specifications of currently existing relevant instrumentation, opening new opportunities for the routine application of this photon-in/photon-out hard x-ray technique to emerging research in multidisciplinary scientific fields, such as energy-related sciences, material sciences, physical chemistry, etc.
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Affiliation(s)
- D Sokaras
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
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Jiang C, Ding Z, Wang M, Yang G, Situ G, Wu Y, Zheng K, Tang S, Liu Z, Qian Q. A transanal procedure using an endoscopic linear stapler for obstructed defecation syndrome: the first Chinese experience. Tech Coloproctol 2011; 16:21-7. [PMID: 22116398 DOI: 10.1007/s10151-011-0789-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 11/03/2011] [Indexed: 12/19/2022]
Abstract
BACKGROUND Transanal surgery using an endoscopic linear stapler is a recognized, but not widely performed technique for the treatment of obstructed defecation syndrome (ODS). A study of consecutive patients was conducted to evaluate the safety and effectiveness of the technique for the treatment of ODS in Chinese patients. METHODS From November 2008 to December 2010, 43 female patients with ODS caused by rectocele and/or rectal intussusception underwent transanal surgery using an endoscopic linear stapler in three Chinese hospitals. Clinical and functional data including the Wexner constipation score and outcome classification were analyzed retrospectively. RESULTS The average duration of surgery was 23 ± 4 min (range 15-30 min). Blood loss was 10 ± 2 ml (range 5-15 ml). The average postoperative hospital stay was 5 days (range 4-6 days). The pathologic findings showed that the specimen contained rectal muscle in all patients. Postoperative complications included 4 patients with transient fecal urgency, 3 patients with anorectal pain, and one patient with mild bleeding from the stapled suture line. Three patients reported minor fecal incontinence (Wexner score less than 3). During a median follow-up of 12 months (range, 3-26 months), the mean constipation score improved from preoperative 13.56 to postoperative 5.07 at 1 year (P < 0.05). The outcome at 1 year was excellent in 18 of 43 patients, good in 13, fairly good in 7, and poor in 5. Postoperative defecography was performed in 28 patients. Rectocele disappeared in 15 patients. Rectocele depth was reduced from 34 ± 4 mm preoperatively to 17 ± 3 mm postoperatively (P < 0.05). CONCLUSION The transanal procedure using an endoscopic linear stapler is an easy, safe, and effective option for selected patients with ODS. Long-term prospective, randomized, controlled studies are needed to confirm the advantages of this procedure in comparison with the traditional transanal and stapled transanal rectal resection (STARR) techniques.
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Affiliation(s)
- C Jiang
- Department of Colorectal Surgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
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Trent M, Qian Q, Frick K, Thompson C, Butz A, Ellen J, Lehmann H. P5-S6.32 Using a contingent valuation method to understand consumer preferences for care of adolescents with pelvic inflammatory disease (PID). Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.588] [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: 11/04/2022]
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Abstract
We report four cases of de novo amyloidosis occurring after 16, 18, 28 and 31 years following kidney transplantation. These patients presented with proteinuria and progressive allograft dysfunction. Kidney biopsy showed AL amyloidosis in all compartments of the allograft kidney. Serum immunofixation studies revealed monoclonal lambda light chains in all four cases. Bone marrow examination showed 10% plasma cells in one case, 5-10% in two cases and less than 5% in one case. Two patients died unexpectedly within 3 months and 1 year of the diagnosis of allograft AL amyloidosis. Of the remaining two, one underwent autologous stem cell transplant that resulted in complete hematologic remission. However, the patient relapsed within 2 years and also developed progressive kidney allograft failure. The patient received a second autologous stem cell transplant with complete hematologic response, followed by a second kidney transplant, which showed no evidence of amyloid at 1-year posttransplant. The remaining case was treated with prednisone and bortezomib, which has stabilized kidney function in the short term. In conclusion, this study shows that AL amyloidosis is an uncommon but important cause of late onset proteinuria in the kidney allograft that results in kidney allograft failure.
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Affiliation(s)
- Q Qian
- Department of Medicine, Division of Nephrology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
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Zhang WJ, Zhang QY, Chen QJ, Qian Q, Yang ZM, Qiu JR, Huang P, Wang YS. Enhanced 2.0 microm emission and gain coefficient of transparent glass ceramic containing BaF2: Ho3+,Tm3+ nanocrystals. Opt Express 2009; 17:20952-20958. [PMID: 19997333 DOI: 10.1364/oe.17.020952] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Transparent glass ceramic containing BaF(2):Ho(3+),Tm(3+) nanocrystals has been prepared by melt quenching and subsequent thermal treatment. The precipitation of BaF(2) nanocrystals was confirmed by X-ray diffraction and high-resolution transmission electron microscopy. Intense 2.0 microm fluorescence originating from Ho(3+): (5)I(7) --> (5)I(8) transition was achieved upon excitation with 808 nm laser diode. A large ratio of forward Tm(3+) --> Ho(3+) energy transfer constant to that of backward process indicated high efficient energy transfer from Tm(3+)((3)F(4)) to Ho(3+)((5)I(7)), benefited from the reduced ionic distances of Tm(3+)-Tm(3+) and Tm(3+)-Ho(3+) pairs and low phonon energy environment with the incorporation of rare-earth ions into the precipitated BaF(2) nanocrystals. The results indicate that glass ceramic is a promising candidate material for 2.0 microm laser.
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Affiliation(s)
- W J Zhang
- Key Lab of Specially Functional Materials of Ministry of Education, Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, P. R. China
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Abstract
BACKGROUND Hysterectomy and bilateral salpingo-oophorectomy (BSO) is the standard surgery for stage I endometrial cancer. Systematic pelvic lymphadenectomy has been used to establish whether there is extra-uterine disease and as a therapeutic procedure; however, randomised trials need to be done to assess therapeutic efficacy. The ASTEC surgical trial investigated whether pelvic lymphadenectomy could improve survival of women with endometrial cancer. METHODS From 85 centres in four countries, 1408 women with histologically proven endometrial carcinoma thought preoperatively to be confined to the corpus were randomly allocated by a minimisation method to standard surgery (hysterectomy and BSO, peritoneal washings, and palpation of para-aortic nodes; n=704) or standard surgery plus lymphadenectomy (n=704). The primary outcome measure was overall survival. To control for postsurgical treatment, women with early-stage disease at intermediate or high risk of recurrence were randomised (independent of lymph-node status) into the ASTEC radiotherapy trial. Analysis was by intention to treat. This study is registered, number ISRCTN 16571884. FINDINGS After a median follow-up of 37 months (IQR 24-58), 191 women (88 standard surgery group, 103 lymphadenectomy group) had died, with a hazard ratio (HR) of 1.16 (95% CI 0.87-1.54; p=0.31) in favour of standard surgery and an absolute difference in 5-year overall survival of 1% (95% CI -4 to 6). 251 women died or had recurrent disease (107 standard surgery group, 144 lymphadenectomy group), with an HR of 1.35 (1.06-1.73; p=0.017) in favour of standard surgery and an absolute difference in 5-year recurrence-free survival of 6% (1-12). With adjustment for baseline characteristics and pathology details, the HR for overall survival was 1.04 (0.74-1.45; p=0.83) and for recurrence-free survival was 1.25 (0.93-1.66; p=0.14). INTERPRETATION Our results show no evidence of benefit in terms of overall or recurrence-free survival for pelvic lymphadenectomy in women with early endometrial cancer. Pelvic lymphadenectomy cannot be recommended as routine procedure for therapeutic purposes outside of clinical trials.
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Qian Q, Zhao C, Yang GF, Yang ZM, Zhang QY, Jiang ZH. Thermal stability and spectroscopic properties of Er3+-doped antimony-borosilicate glasses. Spectrochim Acta A Mol Biomol Spectrosc 2008; 71:280-285. [PMID: 18255334 DOI: 10.1016/j.saa.2007.12.014] [Citation(s) in RCA: 5] [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] [Received: 10/26/2007] [Revised: 12/11/2007] [Accepted: 12/14/2007] [Indexed: 05/25/2023]
Abstract
This paper reports on the optical spectroscopic properties and thermal stability of Er3+-doped antimony-borosilicate glasses for developing 1.5 microm optical amplifiers. Upon excitation at 980 nm laser diode, an intense 1.5 microm infrared fluorescence has been observed with the maximum full width at half maximum (FWHM) of 90 nm for Er3+-doped antimony-borosilicate glasses. The emission cross-section and the lifetime of the 4I13/2 level of Er3+ ions are 6.3 x 10(-21) cm2 and 0.30 ms, respectively. It is noted that the product of the emission cross-section and FWHM of the glass studied is as great as 567 x 10(-21) cm2 nm, which is comparable or higher than that of bismuthate and tellurite glasses.
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Affiliation(s)
- Q Qian
- Key Laboratory of Specially Functional Materials of Ministry of Education, South China University of Technology, 381# Wushan Road, Guangzhou 510641, PR China
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29
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Hua W, Zhou K, Huang Y, Qian Q, He W, Ma S, Chu W, Hu T, Wu Z. Experiment investigation of La(1-x)SrxMnO3 by high-resolution X-ray emission and spin-polarized X-ray absorption spectroscopy. Spectrochim Acta A Mol Biomol Spectrosc 2008; 70:462-465. [PMID: 18319193 DOI: 10.1016/j.saa.2007.11.037] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2005] [Accepted: 11/23/2007] [Indexed: 05/26/2023]
Abstract
Big changes in resistivity along with the changing of local structure in some oxide systems, such as high-temperature superconductors and colossal magnetoresistance system, strongly suggest the need of a systematic investigation of their local electronic and atomic structures. In this work we present the high-resolution X-ray emission spectra and the spin-polarized X-ray absorption near-edge spectroscopy (SPXANES) data at the Mn K-edge in the La(1-x)Sr(x)MnO(3). This experiment is based on a high-resolution large-acceptance crystal analyzer based on Si (111) and optimized for X-ray fluorescence spectroscopy. With a spherical bent crystal monochromator, a Mn Kbeta emission spectra with high resolution was obtained with a short collection time and SPXANES spectra of La(1-x)Sr(x)MnO(3) at room temperature were also measured at high temperature.
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Affiliation(s)
- Wei Hua
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, CAS, Beijing, China
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30
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Lu CJ, Du H, Wu J, Jansen DA, Jordan KL, Xu N, Sieck GC, Qian Q. Non-random distribution and sensory functions of primary cilia in vascular smooth muscle cells. Kidney Blood Press Res 2008; 31:171-84. [PMID: 18483460 DOI: 10.1159/000132462] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Accepted: 03/10/2008] [Indexed: 12/16/2022] Open
Abstract
Although primary cilia are increasingly recognized to play sensory roles in several cellular systems, their role in vascular smooth muscle cells (VSMCs) has not been defined. We examined in situ position/orientation of primary cilia and ciliary proteins in VSMCs and tested the hypothesis that primary cilia of VSMCs exert sensory functions. By immunofluorescence and electron microscopic imaging, primary cilia of VSMCs were positioned with their long axis aligned at 58.3 degrees angle in relation to the cross-sectional plane of the artery, projecting into the extracellular matrix (ECM). Polycystin-1, polycystin-2 and alpha 3- and beta1-integrins are present in cilia. In scratch wound experiments, the majority of cilia were repositioned to the cell-wound interface. Such repositioning was largely abolished by a beta1-integrin blocker. Moreover, compared to non-ciliated/deciliated cells, ciliated VSMCs showed more efficient migration in wound repair. Lastly, when directly stimulated with collagen (an ECM component and cognate ligand for alpha 3beta1-integrins) or induced ciliary deflection, VSMCs responded with a rise in [Ca(2+)](i) that is dependent on the presence of cilia. Taken together, primary cilia of VSMCs are preferentially oriented, possess proteins critical for cell-ECM interaction and mechanosensing and respond to ECM protein and mechanical stimulations. These observations suggest a role for primary cilia in mechanochemical sensing in vasculature.
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Affiliation(s)
- C J Lu
- Division of Nephrology and Hypertension, Mayo Clinic College of Medicine and Mayo Graduate School, Rochester, MN 55905, USA
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31
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Chu L, Gu J, Sun L, Qian Q, Qian C, Liu X. Oncolytic adenovirus-mediated shRNA against Apollon inhibits tumor cell growth and enhances antitumor effect of 5-fluorouracil. Gene Ther 2008; 15:484-94. [PMID: 18239605 DOI: 10.1038/gt.2008.6] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Apollon, a membrane-associated inhibitor of apoptosis protein, protects cells against apoptosis and is upregulated in certain tumor cells. In this study, the effects of Apollon protein knockdown by RNA interference on the growth of human HeLa, HT-1080 and MCF-7 cells in vitro and in vivo were investigated. An oncolytic adenovirus (ZD55) containing the RNA polymerase III-dependent U6 promoter to express short hairpin RNA (shRNA) directed against Apollon (ZD55-siApollon) was constructed. Our data show that ZD55-siApollon successfully exerts a gene knockdown effect and causes the inhibition of tumor cell growth both in culture and in athymic mice in vivo. Cell cycle analysis, 4',6-diamidino-2-phenylindole staining and western blot analysis reveal that ZD55-siApollon-mediated suppression of Apollon induces apoptosis. Intratumoral injection of ZD55-siApollon significantly inhibits tumor growth in HT-1080 xenograft mice. Furthermore, ZD55-siApollon enhances the antitumor effect of 5-fluorouracil, a chemotherapeutic agent. In conclusion, these results suggest that the depletion of Apollon by oncolytic adenovirus-shRNA delivery system provides a promising method for cancer therapy.
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Affiliation(s)
- L Chu
- Laboratory of Molecular Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, PR China
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32
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Yuan QH, Shi L, Wang F, Cao B, Qian Q, Lei XM, Liao YL, Liu WG, Cheng L, Jia SR. Investigation of rice transgene flow in compass sectors by using male sterile line as a pollen detector. Theor Appl Genet 2007; 115:549-60. [PMID: 17622509 DOI: 10.1007/s00122-007-0588-z] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 12/06/2006] [Accepted: 06/07/2007] [Indexed: 05/16/2023]
Abstract
Rice is the most important staple food in the world. The rapid development of transgenic rice and its future commercialization have raised concerns regarding transgene flow and its potential environmental risk. It is known that rice is a self-pollinated crop; the outcrossing rate between common cultivars is generally less than 1%. In order to improve the detection sensitivity of rice transgene flow, a male sterile (ms) line BoA with a high outcrossing rate was used as a pollen detector in this study. A concentric circle design was adopted, in which the transgenic rice B2 containing bar gene as a pollen donor was planted in the center circle and the recipient BoA was planted in eight compass sectors. The frequency of transgene flow in compass sectors was analyzed by continuous sampling to generate cumulative data. The results of two years with sound reproducibility demonstrated that the rice gene flow was closely associated with the wind direction. According to the mean frequency of transgene flow, the eight sectors can be divided into two groups: a higher frequency group downstream of the prevailing wind (DPW) with a mean frequency ranging from 6.47 to 26.24%, and a lower frequency group lateral to or upstream of the prevailing wind (UPW) with a mean frequency of 0.39 to 3.03%. On the basis of the cumulative data, 90-96% of the cumulative gene flow events occurred in the four DPW sectors, while it was 4-10% in the four UPW sectors. By using these systematic data, simulation models and isograms of transgene flow in the eight compass sectors were calculated and drawn, respectively.
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Affiliation(s)
- Q H Yuan
- College of Life Science and Agriculture, MOE Key Lab of Tropic Biological Resources, Hainan University, Haikou, 570228, China
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Wang HF, Liu JX, Qian Q, Wu YM. Feeding brittle culm1whole crop rice replacing wheat by-products to growing-finishing pigs. ACTA AGR SCAND A-AN 2006. [DOI: 10.1080/09064700601108482] [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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34
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Zhao L, Dong A, Gu J, Liu Z, Zhang Y, Zhang W, Wang Y, He L, Qian C, Qian Q, Liu X. The antitumor activity of TRAIL and IL-24 with replicating oncolytic adenovirus in colorectal cancer. Cancer Gene Ther 2006; 13:1011-22. [PMID: 16799468 DOI: 10.1038/sj.cgt.7700969] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [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: 12/19/2022]
Abstract
Melanoma differentiation associated gene-7 (Mda-7)/IL-24 was previously cloned into ZD55 (an adenovirus with E1B55 deleted) to form ZD55-IL-24, which had much better antitumor effect than Ad-IL-24. According to its good antitumor properties, ZD55-IL-24 has been used in preclinical studies. But ZD55-IL-24 alone still could not completely eradicate established tumors in all nude mice. It was reported that IL-24 could induce and enhance the activity of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) (a member of tumor necrosis factor (TNF) superfamily). Accordingly, the combined use of ZD55-IL-24 and ZD55-TRAIL was carried out in this study. Treatment with both ZD55-IL-24 and ZD55-TRAIL could induce more significant apoptosis in cancer cells in vitro compared with ZD55-IL-24 or ZD55-TRAIL alone. The combination of the two replicative adenoviruses had better antitumor activity in vivo than that of single oncolytic adenovirus and led to complete eradication of xenograft tumors in all treated mice. Upregulation of TRAIL was observed in tumor cells infected with ZD55-IL-24 and studies of the apoptotic cascade regulators indicate that ZD55-IL-24 could further enhance the activation of apoptosis through the TNF family of death receptors. We demonstrated for the first time the potential therapeutic effect of combined ZD55-IL-24 with ZD55-TRAIL for the targeted therapy of cancer.
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Affiliation(s)
- L Zhao
- Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, The Graduate School, Chinese Academy of Sciences, Shanghai, China
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35
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Di Paola J, Goldman T, Qian Q, Patil SR, Schutte BC, Schute BC. Breakpoint of a balanced translocation (X:14) (q27.1;q32.3) in a girl with severe hemophilia B maps proximal to the factor IX gene. J Thromb Haemost 2004; 2:437-40. [PMID: 15009460 DOI: 10.1111/j.1538-7933.2004.00626.x] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hemophilia B is an X-linked bleeding disorder caused by the deficiency of coagulation factor (F)IX, with an estimated prevalence of 1 in 30 000 male births. It is almost exclusively seen in males with rare exceptions. We report a girl who was diagnosed with severe (<1%) FIX deficiency at 4 months of age. Cytogenetic studies in the patient showed a balanced translocation between one of the X-chromosomes and chromosome 14, with breakpoints at bands Xq27.1 and 14q32.3. Both parents were found to have normal chromosomes. Late replication studies by incorporation of 5-bromodeoxyuridine showed non-random inactivation of the normal X-chromosome, a phenomenon frequently seen in balanced X/autosome translocations. To map the breakpoint, fluorescent in-situ hybridization was performed. A PAC DNA probe, RP6-88D7 (which contains the FIX gene) hybridized only on the normal chromosome X as well as onto the derivative 14. Using a PAC DNA probe, RP11-963P9 that is located proximal to the FIX gene, we obtained signals on the normal and derivative X and also on the derivative 14. We conclude that the breakpoint is located within the DNA sequence of this clone mapping proximal to the FIX gene. Since the FIX gene seems to be intact in the derivative 14, the breakpoint may affect an upstream regulatory sequence that subjects the gene to position effect variegation (PEV).
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Affiliation(s)
- J Di Paola
- Department of Pediatrics, University of Iowa, Iowa City, IA, USA.
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36
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Abstract
The pig amelogenin gene was isolated from a Lambda genomic library, and a 6.3 kb SalI/XbaI restriction fragment, inclusive of exons 3 through 7, was subcloned into a plasmid vector. DNA sequencing revealed two putative exon 4 sequences. The derived amino acid sequence of exon 4a, KSGRWGARLTAFVSSVQ, had previously been identified in a 190-amino-acid amelogenin isoform by protein sequencing. Exon 4b encoded the peptide DLYLEAIRIDRTAF, which is homologous to exon 4-encoded segments reported for human, mouse, and rat. Oligonucleotides from both of these exons were used to amplify cDNA generated from developing teeth. Amplification products were analyzed by agarose gel electrophoresis, cloned, and characterized by DNA sequencing. Exon 4a was found in transcripts encoding amelogenin isoforms having 190 and 73 amino acids. Exon 4b was found only in apparent splicing intermediates that retained intron 3, but was not detected in any final mRNA transcripts. Pig amelogenin having apparent molecular mass of 23 kD were isolated from the enamel matrix and characterized by mass spectrometry. Two mass values, 18,512.5, and 18,571.2 Da, were measured that match the values predicted for the 162-amino-acid cleavage product of the 173-amino-acid amelogenin, and the 165-amino-acid cleavage product of the 190-amino-acid amelogenin, which includes 17 amino acids encoded by exon 4a. We conclude that the pig amelogenin gene expresses a unique exon 4 that is not homologous to, or evolved from, the exon 4 segment expressed in humans and rodents.
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Affiliation(s)
- C C Hu
- University of Texas School of Dentistry, Health Science Center at San Antonio, Department of Pediatric Dentistry, 7703 Floyd Curl Drive, San Antonio, TX 78284-7888, USA.
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37
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Zheng YL, Dong HB, Qian Q. [Clinical application of precision attachment prosthesis]. Shanghai Kou Qiang Yi Xue 2001; 10:313-5. [PMID: 14993959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
OBJECTIVE In this study, clinical effects of three precision attachment prostheses were evaluated. METHODS 16 DUOLOCK attachments 15 ANKER SYSTEM attachments and 8 MK 1 attachments were applied to restore 22 dentition defect cases, which consisted of 17 Kenny I defects, 3 Kenny II defects, 2 Kenny III defects. The clinical effects of three precision attachment prostheses were analyzed. RESULTS 22 patients with precision attachment prostheses were followed up for 6 to 19 months. More than 86% patients felt comfortable, adaptive, aesthetics and fine retention. The rechecking results of 91 abutments displayed that all abutments were healthy without percussion pain, looseness, and disease of root tip and absorption of alveolar bone. The congestion and edema in gingival edge of 21 abutments were reduced after treatment. The masticatory efficiency measurement of 18 patients restored with precision attachment prostheses showed that the patients masticatory efficiency achieved 86.73% of the same age healthy dentition after 3 months, and 90.57% of the same age healthy dentition after 1 year. CONCLUSION The three attachment prostheses can achieve satisfactory effect.
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Affiliation(s)
- Y L Zheng
- Department of Prosthetic Dentistry, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University, Shanghai 20011, China
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Sakoulas G, Gold HS, Venkataraman L, DeGirolami PC, Eliopoulos GM, Qian Q. Methicillin-resistant Staphylococcus aureus: comparison of susceptibility testing methods and analysis of mecA-positive susceptible strains. J Clin Microbiol 2001; 39:3946-51. [PMID: 11682512 PMCID: PMC88469 DOI: 10.1128/jcm.39.11.3946-3951.2001] [Citation(s) in RCA: 150] [Impact Index Per Article: 6.5] [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: 11/20/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is responsible for an increasing number of serious nosocomial and community-acquired infections. Phenotypic heterogeneous drug resistance (heteroresistance) to antistaphylococcal beta-lactams affects the results of susceptibility testing. The present study compared the MRSA-Screen latex agglutination test (Denka Seiken Co., Ltd., Tokyo, Japan) for detection of PBP 2a with agar dilution, the VITEK-1 and VITEK-2 systems (bioMérieux, St. Louis, Mo.), and the oxacillin agar screen test for detection of MRSA, with PCR for the mecA gene used as the "gold standard" assay. Analysis of 107 methicillin-susceptible S. aureus (MSSA) isolates and 203 MRSA isolates revealed that the MRSA-Screen latex agglutination test is superior to any single phenotype-based susceptibility testing method, with a sensitivity of 100% and a specificity of 99.1%. Only one isolate that lacked mecA was weakly positive by the MRSA-Screen latex agglutination test. This isolate was phenotypically susceptible to oxacillin and did not contain the mecA gene by Southern blot hybridization. The oxacillin agar screen test, the VITEK-1 system, the VITEK-2 system, and agar dilution showed sensitivities of 99.0, 99.0, 99.5, and 99%, respectively, and specificities of 98.1, 100, 97.2, and 100%, respectively. The differences in sensitivity or specificity were not statistically significant. Oxacillin bactericidal assays showed that mecA- and PBP 2a-positive S. aureus isolates that are susceptible to antistaphylococcal beta-lactams by conventional methods are functionally resistant to oxacillin. We conclude that the accuracy of the MRSA-Screen latex agglutination method for detection of PBP 2a approaches the accuracy of PCR and is more accurate than any susceptibility testing method used alone for the detection of MRSA.
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Affiliation(s)
- G Sakoulas
- Division of Infectious Diseases, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA.
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Hua ZH, Zhu XF, Lin HS, Gao ZY, Qian Q, Yan MX, Huang DN. [Studies of the integration and expression of exogenes in transgenic rice obtained via particle bombardment transformation]. Yi Chuan Xue Bao 2001; 28:1012-8. [PMID: 11725635] [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: 02/22/2023]
Abstract
Various integration events from simple to complex have been found in transgenic elite rice varieties, which were co-transformed with bar and cecropin B gene by particle bombardment after system studies of the structure and expression of the transgene. It was displayed that there were one to seven insertion loci and one to ten copies of transgene in different transformants. No absolute correlation was found between the numbers of transgene copies and the gene expression. Different level expression of transgenes with similar insertion mode was also discovered. The expression cassette integrity and transcription frequency of selectable bar gene were more than non-selectable cecropin B gene, whereas gene silence in plants integrated with intact bar gene was found and higher expression level of cecropin B gene with 0.6 kb fragments degraded in terminator was deduced.
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Affiliation(s)
- Z H Hua
- Biotechnology Department, China National Rice Research Institute and Key Laboratory for Rice Biology, Ministry of Agriculture, Hangzhou 310006, China
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40
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Feng W, Qian Q, Ding W, Chai Z. Tissue contents and subcellular distribution of chromium and other trace metals in experimental diabetic rats after intravenous injection of Cr 50-enriched stable isotopic tracer solution. Metabolism 2001; 50:1168-74. [PMID: 11586488 DOI: 10.1053/meta.2001.26760] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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: 11/11/2022]
Abstract
In order to study the metabolism of essential trace elements in diabetics, we studied alloxan-diabetic rats for the distribution patterns of chromium (Cr), cobalt (Co), iron (Fe), selenium (Se), and zinc (Zn) in the liver, kidney, pancreas, and testes, as well as in the organ subcellular fractions. Normal rats were used as controls. Cr 50-enriched stable isotopic tracer solution was given by intravenous injection to avoid the difficulties of estimation of Cr status. Our data show that the concentrations of Zn in liver and kidney, of Co, Fe, and Zn in pancreas, and of Fe and Zn in testes of the diabetic rats were significantly higher than in the control rats. Nevertheless, the concentrations of Cr in pancreas, Fe in kidney, and Cr and Se in testes of the diabetic rats were significantly lower than in the controls. Furthermore, we observed significant alterations of element concentrations in subcellular fractions of various organs in the diabetic rats. These results suggest that changing hormone levels may interfere with the accumulation of some trace elements both in the organs and in the subcellular fractions of rats.
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Affiliation(s)
- W Feng
- Institute of High Energy Physics and Laboratory of Nuclear Analytical Techniques, Chinese Academy of Sciences, Beijing, China
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41
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Qian Q, Tang YW, Kolbert CP, Torgerson CA, Hughes JG, Vetter EA, Harmsen WS, Montgomery SO, Cockerill FR, Persing DH. Direct identification of bacteria from positive blood cultures by amplification and sequencing of the 16S rRNA gene: evaluation of BACTEC 9240 instrument true-positive and false-positive results. J Clin Microbiol 2001; 39:3578-82. [PMID: 11574575 PMCID: PMC88391 DOI: 10.1128/jcm.39.10.3578-3582.2001] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [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: 11/20/2022] Open
Abstract
In a previous study which evaluated the BACTEC 9240 automated blood culture system (Becton Dickinson Diagnostic Instrument Systems, Sparks, Md.), we noted a 1.3% "instrument false-positive" rate. That is, the BACTEC system signaled that a bottle (BACTEC Plus Aerobic/F bottle or BACTEC Anaerobic Lytic/10 bottle) culture was positive but a Gram stain was negative and there was no growth of bacteria or yeasts on subculture to chocolate agar. Furthermore, from the same sample of blood, cultures for fungi using the Isolator blood culture system (Wampole Laboratories, Cranbury, N.J.) were negative for growth. For the present study, we evaluated 76 instrument false-positive samples for the presence of 16S ribosomal DNA using the MicroSeq 500 kit (PE Biosystems, Foster City, Calif.). These samples also were negative for fungi by the Isolator method. This kit has a PCR module and sequencing module for the amplification and sequencing of the 16S RNA gene and provides a database for sequence alignment and identification of bacteria. To optimize the assay, we evaluated the effect of adding 0.5% bovine serum albumin to the sample from blood culture bottles and found that it decreased the effects of inhibitors on the PCR. Two control groups of blood culture specimens were also evaluated. One group (n = 45) were "instrument true positives"; the instrument signaled positive, and subsequent Gram stains were positive and subcultures on chocolate agar grew bacteria. The other group (n = 20) were "instrument true negatives"; the instrument signaled negative, the Gram stain was negative, and subcultures on chocolate agar and from the Isolator tube on fungal media showed no growth. None of the 76 instrument false-positive samples had evidence for 16S rRNA gene sequences. All of the instrument true-positive samples and all of the instrument true-negative specimens were positive and negative, respectively, using the MicroSeq 500 kit. Total peripheral white blood cell counts were statistically significantly higher for patients who had instrument false-positive results than for patients who had instrument true-positive or true-negative results (P = 0.001). We conclude that instrument false positives signaled by the BACTEC 9240 system are not due to bacteria in the blood culture samples.
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Affiliation(s)
- Q Qian
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, USA
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Abstract
Lateral gene transfer refers to the movement of genetic information from one genome to another, and the integration of that foreign DNA into its new genetic environment. There are currently only a few well-supported cases of prokaryote-to-eukaryote transfer known that do not involve mitochondria or plastids, but it is not clear whether this reflects a lack of such transfer events, or poor sampling of diverse eukaryotes. One gene where this process is apparently active is glyceraldehyde-3-phosphate dehydrogenase (GAPDH), where lateral transfer has been implicated in the origin of euglenoid and kinetoplastid genes. We have characterised GAPDH genes from diplonemids, heterotrophic flagellates that are closely related to kinetoplastids and euglenoids. Two distinct classes of diplonemid GAPDH genes were found in diplonemids, however, neither class is closely related to any other euglenozoan GAPDH. One diplonemid GAPDH is related to the cytosolic gapC of eukaryotes, although not to either euglenoids or kinetoplastids, and the second is related to cyanobacterial and proteobacterial gap3. The bacterial gap3 gene in diplonemids provides one of the most well-supported examples of lateral gene transfer from a bacterium to a eukaryote characterised to date, and may indicate that diplonemids have acquired a novel biochemical capacity through lateral transfer.
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Affiliation(s)
- Q Qian
- Canadian Institute for Advanced Research, Department of Botany, University of British Columbia, Vancouver, Canada
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43
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Abstract
An increased understanding of the molecular genetic and cellular pathophysiologic mechanisms responsible for the development of autosomal-dominant polycystic kidney disease (ADPKD), made possible by the advances in molecular biology and genetics of the last three decades, has laid the foundation for the development of effective therapies. As the concept that a polycystic kidney is a neoplasm in disguise is becoming increasingly accepted, the development of therapies for ADPKD may benefit greatly from the expanding body of information on cancer chemoprevention and chemosuppression. This review summarizes the observations that already have been made and discusses therapies for PKD that deserve investigation.
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Affiliation(s)
- Q Qian
- Mayo Clinic/Mayo Foundation, Rochester, Minnesota 55905, USA
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Hu CC, Simmer JP, Bartlett JD, Qian Q, Zhang C, Ryu OH, Xue J, Fukae M, Uchida T, MacDougall M. Murine enamelin: cDNA and derived protein sequences. Connect Tissue Res 2001; 39:47-61; discussion 63-7. [PMID: 11062988 DOI: 10.3109/03008209809023911] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Enamelin is the largest enamel protein. Recently we reported the characterization of a cDNA clone encoding porcine enamelin. The secreted protein has 1104 amino acids--over 6 times the length of amelogenin (173 amino acids) and almost 3 times the lengths of sheathlin (395 amino acids) and tuftelin (389 amino acids). Immunohistochemistry has shown that uncleaved porcine enamelin concentrates at the growing tips of the enamel crystallites while its cleavage products localize to rod and interrod enamel. Here we report the isolation and characterization of cDNA encoding murine amelogenin and demonstrate the tooth specificity of porcine enamelin. The murine clone is 4154 nucleotides in length and encodes a protein of 1274 amino acids. In the absence of post-translational modifications murine enamelin has an isotope averaged molecular mass of 137 kDa and an isoelectric point of 9.4. Multiple tissue Northern blot analyses detect porcine enamelin mRNA in developing teeth but not in liver, heart, brain, spleen, skeletal muscle and lung. Mouse and porcine enamelin share 61% amino acid identity and 75% DNA sequence identity. Mouse enamelin has 14 tandemly arranged copies of an 11 amino acid segment that is found only once in porcine enamelin.
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Affiliation(s)
- C C Hu
- University of Texas Health Science Center at San Antonio, School of Dentistry, Department of Pediatric Dentistry, 78284-7888, USA.
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Zhu XD, Zhang XH, Qian Q, Yan XQ, Min SK, Xiong ZM. [Genetic study of plant height of tall plant mutant Mh-1 in rice (Oryza sativa L.)]. Yi Chuan Xue Bao 2001; 27:311-6. [PMID: 11147349] [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: 02/18/2023]
Abstract
Mh-1 is a tall plant mutant induced by irradiation from semi-dwarfed variety Guichao 2. The genetic analyses were carried out through the F1, F2, F3 progenies and test-crossed F1 on Mh-1 crossed with materials with sd-1 gene, non-allelic gene to sd-1 and common tall plant. The results indicate that the induced tall plant trait of Mh-1 is controlled by a recessive inhibiting gene, named tentatively i-sd-1(t), that can regulate the expression of sd-1 gene but not of non-allelic gene to sd-1. The valuation of i-sd-1(t) in hybrid rice breeding was discussed.
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Affiliation(s)
- X D Zhu
- China National Rice Research Institute, Key Laboratory for Rice Biology, Ministry of Agriculture, Hangzhou 310006, China
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Abstract
A microITIES array, created by laser photoablation of a 12-microm polyester film, was used to investigate electroassisted anion transfer between two immiscible electrolyte solutions. Besides measuring directly the transfer of nitrate to the organic phase, the enhancement of transfer of the cation (K+) by facilitated anion (counterion) transfer was measured as well. In the presence of a triamide derived from tris(2-aminoethyl)amine (tren), which is known to function as a host for nitrate, the current responses for both nitrate and potassium transfer were monitored. The linear relationships between the current responses and nitrate concentration formed the basis of an anion sensor with a dynamic range from 0.1 to 5 mM. A dual facilitated transfer mechanism is proposed to explain the enhancement phenomenon.
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Affiliation(s)
- Q Qian
- Department of Chemistry, University of Kansas, Lawrence 66045, USA
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Fan GH, Yang W, Wang XJ, Qian Q, Richmond A. Identification of a motif in the carboxyl terminus of CXCR2 that is involved in adaptin 2 binding and receptor internalization. Biochemistry 2001; 40:791-800. [PMID: 11170396 PMCID: PMC2664867 DOI: 10.1021/bi001661b] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.0] [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: 11/29/2022]
Abstract
Agonist treatment of cells expressing the chemokine receptor, CXCR2, induces receptor phosphorylation and internalization through a dynamin-dependent mechanism. In the present study, we demonstrate that a carboxyl terminus-truncated mutant of CXCR2 (331T), which no longer undergoes agonist-induced phosphorylation, continues to undergo ligand-induced internalization in HEK293 cells. This mutant receptor exhibits reduced association with beta-arrestin 1 but continues to exhibit association with adaptin 2 alpha and beta subunits. Replacing Leu320-321 and/or Ile323-Leu324 with Ala (LL320,321AA, IL323,324AA, and LLIL320,321,323,324AAAA) in wild-type CXCR2 or 331T causes little change in ligand binding and signaling through Ca(2+) mobilization but greatly impairs the agonist-induced receptor sequestration and ligand-mediated chemotaxis. The LL320,321AA, IL323,324AA, and LLIL320,321,323,324AAAA mutants of CXCR2 exhibit normal binding to beta-arrestin 1 but exhibit decreased binding to adaptin 2alpha and beta. These data demonstrate a role for the LLKIL motif in the carboxyl terminus of CXCR2 in receptor internalization and cell chemotaxis and imply a role for adaptin 2 in the endocytosis of CXCR2.
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Affiliation(s)
- G H Fan
- Veterans Affairs Medical Center, Nashville, Tennessee 37212-2637, USA
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Qian Q, He P, Teng S, Zeng DL, Zhu LH. [QTLs analysis of tiller angle in rice (Oryza sativa L.)]. Yi Chuan Xue Bao 2001; 28:29-32. [PMID: 11209708] [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: 04/16/2023]
Abstract
Tiller angle is one of important characters that constitute plant type with great significance in breading. A pair of japonica/indica lines, which were significantly different in tiller angle, were used in this study. A DH population were constructed via anther culture of F1 hybrids. The tiller angles of 115 DH lines were measured. QTL analysis was conducted based on the constructed molecular linkage map. Three QTLs (qTA-9a, qTA-9b and qTA-12) were detected on chromosome 9 and 12 respectively, Their variation were 22.7%, 11.9% and 20.9% respectively and their additive effects were all negative, showing this character was controlled by genes from big tiller angle parent ZYQ8. The application of the tiller angle that was controlled by major genes and minor genes in rice breeding is also discussed.
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Affiliation(s)
- Q Qian
- China National Rice Research Institute, Hangzhou 310006, China
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Abstract
BACKGROUND The pck rat is a recently identified model of polycystic kidney disease (PKD) and liver disease (PLD) that developed spontaneously in the rat strain Crj:CD/SD. Its pattern of inheritance is autosomal recessive. METHODS To characterize this new model, we studied pck rats derived from F9 breeding pairs from Charles River Japan and control Sprague-Dawley rats. Blood and tissues (kidneys, liver, and pancreas), obtained from these rats at 1, 7, 21, 70, and 182 days of age, were used for biochemical determinations, light and electron microscopy, and immunohistochemistry. RESULTS The pck rats develop progressive cystic enlargement of the kidneys after the first week of age, and liver cysts are evident by day 1. The renal cysts developed as a focal process from thick ascending loops of Henle, distal tubules, and collecting ducts in the corticomedullary region and outer medulla. Flat and polypoid epithelial hyperplasia were common in dilated tubules and cysts. Apoptosis was common and affected normal, as well as dilated tubules, but less frequently cysts lined by flat epithelium. The basement membranes of the cyst walls exhibited a variety of alterations, including thinning, lamellation, and thickening. Focal interstitial fibrosis and inflammation were evident by 70 days of age. Segmental glomerulosclerosis and segmental thickening of the basement membrane with associated effacement of the podocyte foot processes were noted in some rats at 70 days of age. The PKD was more severe in male than in female pck rats, as reflected by the higher kidney weights, while there was no gender difference in the severity of the PLD. Mild bile duct dilation was present as early as one day of age. With age, it became more severe, and the livers became markedly enlarged. Even then, however, there was only a mild increase in portal fibrosis, without formation of fibrous septae. Slight elevations of plasma blood urea nitrogen levels were detected at 70 and 182 days of age. CONCLUSIONS The pck rat is a new inherited model of PKD and PLD with a natural history and renal and hepatic histologic abnormalities that resemble human autosomal dominant PKD. This model may be useful for studying the pathogenesis and evaluating the potential therapies for PKD and PLD. The identification of the pck gene may provide further insight into the pathogenesis of autosomal dominant PKD.
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Affiliation(s)
- D J Lager
- Mayo Foundation, Rochester, Minnesota 55905, USA
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Caterina J, Shi J, Sun X, Qian Q, Yamada S, Liu Y, Krakora S, Bartlett JD, Yamada Y, Engler JA, Birkedal-Hansen H, Simmer JP. Cloning, characterization, and expression analysis of mouse enamelysin. J Dent Res 2000; 79:1697-703. [PMID: 11023266 DOI: 10.1177/00220345000790091001] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Enamelysin is a recently isolated member of the matrix metalloproteinase (MMP) family of extracellular matrix (ECM)-degrading enzymes. Here we describe the isolation and characterization of the mouse enamelysin cDNA. Expression of mouse enamelysin was detectable only in ameloblasts and odontoblasts of developing teeth. Characterization of mouse enamelysin demonstrated that it is highly conserved in both its sequence content and pattern of expression relative to the porcine, human, and bovine homologues previously described.
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Affiliation(s)
- J Caterina
- Matrix Metalloproteinase Unit, National Institute of Dental and Craniofacial Research, Bethesda, MD 20892-4380, USA.
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