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Qi X, Wang Y, Xia L, Meng Y, Li Y, Yu S, Su X, Jin S, Li Y, Ge H, Zhang Y, Zhuang D, Ma J. Cross-sectional survey on public health informatics workforce in China: issues, developments and the future. Public Health 2015; 129:1459-64. [PMID: 25904003 PMCID: PMC7111694 DOI: 10.1016/j.puhe.2015.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 12/15/2014] [Accepted: 03/04/2015] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To explore the current situation and issues related to the development of the public health informatics (PHI) workforce in provincial and prefectural centers for disease control and prevention (CDCs) in China, and to describe the corresponding strategies to address these issues for the future. STUDY DESIGN National cross-sectional study. METHODS One thousand two hundred and eighty-one respondents were selected at random from provincial and prefectural CDCs. The survey used a self-administered, structured questionnaire with an online data collection tool that integrated data quality control and user management. The questionnaire was divided into seven main categories. Score percentage of satisfaction and proportion in each part were calculated. Descriptive statistics were used to analyse the data, stratifying by country region, CDC level, job role and educational level. RESULTS One hundred and sixty staff from provincial CDCs and 1121 staff from prefectural CDCs were selected. Only 7.4% (33/445) of prefectural CDCs were not involved in this survey, due to lack of PHI practitioners. CDC staff in the eastern region were predominantly aged 30-39 years (39.5%), which was much younger compared with the other regions (P = 0.0012). Only 34 respondents (2.7%) had academic majors in both health and information technology. More staff had Master's degrees and a higher level of education (18.7%) in the eastern region compared with the other regions (P < 0.0001). Staff in the eastern region in high-level positions and with a higher level of education were more knowledgeable about PHI strategy. Prefectural CDC staff were more satisfied with their work and training than provincial CDC staff. In the eastern region, 34.9% of staff were hired through competitive recruitment, and 57.8% of staff had received a job description with detailed information about their responsibilities, which was higher than in the other regions. Staff in the western region were more likely to leave if a better job became available (37.7%) compared with staff in the other regions (P = 0.0116). CONCLUSION This study found regional disparities in PHI workforce development, possibly related to disparities in overall regional development. Findings showed a severe shortage of staff with a background in PHI, and occupational development paths were clearly lacking. Based on this study of current workforce issues, a comprehensive strategy for PHI workforce development in China has been described.
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Kishan A, Cameron R, Wang J, Alexander S, Qi X, Kupelian P, Steinberg M, Lee J, Selch M, Lee P. Tomotherapy Improves Local Control and Changes Failure Patterns in Locally Advanced Malignant Pleural Mesothelioma. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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153
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Feng X, Qi X, Yang L, Duan X, Fang B, Gongsang Q, Bartholomot B, Vuitton D, Wen H, Craig P. Human cystic and alveolar echinococcosis in the Tibet Autonomous Region (TAR), China. J Helminthol 2015; 89:671-9. [PMID: 26271332 PMCID: PMC4700907 DOI: 10.1017/s0022149x15000656] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 07/03/2015] [Indexed: 11/30/2022]
Abstract
Human cystic echinococcosis (CE) is known to be endemic in the Tibet Autonomous Region (TAR), China; however, there is relatively little data from hospital records or community prevalence studies, and the situation regarding occurrence of human alveolar echinococcosis (AE) is unclear. Here we review the available reports about human echinococcosis in the seven prefectures of TAR. In addition, two pilot studies by mass screening using ultrasound (with serology) were undertaken (2006/7) in Dangxiong County of Lhasa Prefecture (north central TAR) and Dingqing County of Changdu Prefecture (eastern TAR). In Dangxiong County a prevalence of 9.9% (55/557) for human CE was obtained but no human AE cases were detected. By contrast, in Dingqing County (N= 232 persons screened), 11 CE cases (4.7%) and 12 AE cases (5.2%) (including one mixed CE and AE case) were diagnosed by ultrasound. Hospital records and published reports indicated that CE cases were recorded in all of seven prefectures in Tibet Autonomous Region, and AE cases in four prefectures. Incidence rates of human CE were estimated to range from 1.9 to 155 per 100,000 across the seven prefectures of TAR, with a regional incidence of 45.1 per 100,000. Incidence of AE was estimated to be between 0.6 and 2.8 cases per 100,000. Overall for TAR, human AE prevalence appeared relatively low; however, the pilot mass screening in Dingqing in eastern TAR indicated that human AE disease is a potential public health problem, possibly similar to that already well described in Tibetan communities bordering TAR in north-west Sichuan and south-west Qinghai provinces.
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Qi X, McCloskey S, Low D, Steinberg M, Kupelian P, Sheng K. Prediction of Long-term Clinical Dose Response for Early-Stage Breast Cancer Using a Dual-Compartment Mathematical Model. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cai HY, Yu B, Feng ZC, Qi X, Wei XJ. Clinical significance of CD44 expression in children with hepatoblastoma. GENETICS AND MOLECULAR RESEARCH 2015; 14:13203-7. [PMID: 26535633 DOI: 10.4238/2015.october.26.16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this study was to investigate the expression of CD44 and its clinical significance in children suffering from hepatoblastoma (HB). CD44 expression was detected with immunohistochemistry staining in 30 samples from hepatoblastoma children and 10 normal liver tissue samples from normal children. The data obtained was statistically analyzed using the chi-square test, using the SPSS (v.11.0) software. The rate of CD44 expression was significantly higher (66.7%) in hepatoblastoma tissues than in normal liver tissues (χ(2) = 4.848, P < 0.05). The rate of CD44 expression was significantly higher in children with stage III or IV hepatoblastoma (83.3%) than that in children with stage I and II hepatoblastoma (χ(2) = 5.625, P < 0.05) (41.7%). Therefore, CD44 expression might play an important role in the pathogenesis, progression, and prognosis of HB in children.
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Qi X, Dong Q, Qiu F, Wang Z, Liu J. A study of clinical manifestation and therapies of 314 patients with psychogenic dizziness. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Dong Q, Qi X. Clinical features and therapy analysis of 208 patients with psychogenic dizziness. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ou-Yang PB, Qi X, Zhu XH, Duan XC. Central Serous Chorioretinopathy: Signal to Reduce Corticoid in Renal Transplant Recipients? Transplant Proc 2015; 47:2236-8. [PMID: 26361687 DOI: 10.1016/j.transproceed.2015.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 07/14/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE The aim of this work was to report the treatment effectiveness of central serous chorioretinopathy (CSCR) in a renal transplant recipient who received conventional therapy with little effect, and then reducing corticoid successively and with a better outcome later. METHODS We performed a retrospective comparison of best-corrected visual acuity (BCVA) and spectral-domain optical coherence tomography (SD-OCT) of a 57-year-old renal transplant recipient who received conventional therapy and reducing corticoid successively after he was diagnosed as CSCR in the left eye. RESULTS The BCVA of the left eye stayed at 20/200 after 3 months' conventional therapy, but rapidly improved to 20/25 after reducing corticoid by one-half. At the same time, SD-OCT showed much more obvious absorption of retinal liquid in the left eye from reducing corticoid than from conventional therapy. Despite the reducing of corticoid by one-half, the patient did not show any signs of rejection of the renal transplant. CONCLUSIONS CSCR may be a sign in renal transplant recipients for reducing corticoid, and reducing corticoid might be a more reliable and safer treatment for such patients.
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Li X, Gao J, Huang K, Qi X, Dai Q, Mei X, Xu W. Dynamic changes of global DNA methylation and hypermethylation of cell adhesion-related genes in rat kidneys in response to ochratoxin A. WORLD MYCOTOXIN J 2015. [DOI: 10.3920/wmj2014.1795] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Ochratoxin A (OTA), which is found in a variety of food products, is associated with the development of nephrotoxicity and carcinogenicity in rats and has raised public health concerns. A previous study in our laboratory indicated that OTA exposure induced cytotoxicity by decreasing global DNA methylation in vitro. However, the relationship between OTA-induced nephrotoxicity and DNA methylation changes in vivo remains unclear. The object of this study was to investigate whether OTA can change global DNA methylation or alter the expression of several critical tumour-related genes by inducing methylation modifications before carcinogenesis. We focused on the mechanism of action of OTA in regard to DNA methylation, including the expression of DNA methyltransferases and the regulation of specific cell signalling pathways. Dynamic and dose-dependent changes of global DNA methylation were observed during OTA-induced nephrotoxicity and probably associated with the expression of DNA methyltransferase 1. 13-week exposure of OTA caused hypermethylation in the promoters of critical cell adhesion-related genes, E-cadherin and N-cadherin, leading to reduction of the corresponding mRNA expression, accompanied by transcriptional activation of the Wnt and PI3K/AKT pathways. These findings suggested that long-term OTA exposure could disrupt DNA methylation profile, which might be one of the possible mechanisms of OTA-induced nephrotoxicity.
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Wang S, Qi X, Liu F, Zheng M, Zhang D. An improved technique for bladder cancer: Pure laparoscopic radical cystectomy with orthotopic U-shape ileal neobladder using titanium staples. Eur J Surg Oncol 2015; 41:1522-8. [PMID: 26238478 DOI: 10.1016/j.ejso.2015.06.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 06/09/2015] [Accepted: 06/24/2015] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE To report our experience with an improved technique of laparoscopic radical cystectomy (LRC) and orthotopic ileal neobladder reconstruction, evaluating the perioperative and pathological outcomes. METHODS We retrospectively reviewed the data of 56 cases who underwent radical cystoprostatectomy followed by construction of an orthotopic U-shaped ileal neobladder between August 2010 and December 2014. These data include intraoperative data, early and long-term postoperative complications, neobladder function, urinary continence and oncologic results. Also the key innovative procedure was introduced with details. RESULTS The median time of the overall procedure was 212 min. The median estimated blood loss was 171 ml. The median hospitalization time after the operation was 21 days. Complications included two cases of unilateral ureter-pouch anastomotic strictures, one case of bilateral ureteral stricture, three cases of vesicourethral anastomotic strictures and three cases of vesicourethral leakage. The mean maximum pouch capacity was 446 ± 32 ml, and pouch pressure at capacity was 18.1 ± 2.6 cm H2O. The Qmax was 14 ± 1.2 ml/s, and the mean postvoid residual was 25 ± 10 ml. There were 9 cases of night-time incontinence at 3 months post-operatively. Negative surgical margins of the bladder specimens were achieved in all patients. During a follow-up period of 3-44 months (average 32.6 months), local recurrence was found in two patients and distant metastasis was occurred in another 3 patients. CONCLUSIONS Our preliminary experience showed that pure LRC with nonabsorbable titanium staples assisted orthotopic U-shape ileal neobladder reconstruction is feasible based on perioperative data and oncologic features.
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Fu J, Ai J, Jin M, Jiang C, Zhang J, Shi C, Lin Q, Yuan Z, Qi X, Bao C, Tang F, Zhu Y. Emergence of a new GII.17 norovirus variant in patients with acute gastroenteritis in Jiangsu, China, September 2014 to March 2015. ACTA ACUST UNITED AC 2015; 20. [PMID: 26111236 DOI: 10.2807/1560-7917.es2015.20.24.21157] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
From September 2014 to March 2015, 23 outbreaks of norovirus (NoV) acute gastroenteritis occurred in Jiangsu, China. Partial sequencing of the NoV capsid gene suggested that 16 of the 23 outbreaks were related to a new GII.17 variant. This variant was first detected in sporadic specimens in October 2014, and became predominant in February 2015. Analysis of the RNA-dependent RNA polymerase (RdRp), and complete capsid including the protruding domain P2 sequences confirmed this GII.17 variant as distinct from previously identified GII variants.
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Qi X, Blanco V, Chu Z, Vallabhapurapu S, Sulaiman M, Franco R. P-040 Phosphatidylserine Targeted Therapy of Pancreatic Cancer Using SapC-DOPS Nanovesicles. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.40] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Xia D, Li W, Zhang L, Qian H, Yao S, Qi X. RNA interference-mediated knockdown of brain-derived neurotrophic factor (BDNF) promotes cell cycle arrest and apoptosis in B-cell lymphoma cells. Neoplasma 2015; 61:523-32. [PMID: 25030435 DOI: 10.4149/neo_2014_064] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) is a member of the neurotrophin superfamily that has been reported to be involved in a number of neurological and psychological situations. Recently, high expression level of BDNF is observed in diverse human malignancies, delineating a role of BDNF in tumorigenesis. Nevertheless, its effect on B-cell lymphoma remains unclear. In this study, RNA interference technology mediated by short hairpin RNA (shRNA) was performed to inhibit endogenous BDNF expression in B-cell lymphoma cells. Results showed that knockdown of BDNF reduced cell growth and proliferation of Raji and Ramos cells. Furthermore, down-regulation of BDNF induced a cell cycle arrest at G0/G1 phase in Raji cells, and consequently led to cell apoptosis in vitro. Meanwhile, down-regulation of Bcl-2 and up-regulation of Bax, activated caspase-3 and caspase-9 and cleaved poly (ADP-ribose) polymerase (PARP) were observed in Raji cells when endogenous BDNF was inhibited. Besides, we also found that suppression of BDNF in Raji cells increased their sensitivity to chemotherapeutic drug, 5-Fluorouracil (5-FU). Our research provides a promising therapeutic strategy for human B-cell lymphoma by targeting BDNF.
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Yin N, Qi X, Tsai S, Lu Y, Basir Z, Oshima K, Thomas JP, Myers CR, Stoner G, Chen G. p38γ MAPK is required for inflammation-associated colon tumorigenesis. Oncogene 2015; 35:1039-48. [PMID: 25961922 DOI: 10.1038/onc.2015.158] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 03/03/2015] [Accepted: 03/10/2015] [Indexed: 12/22/2022]
Abstract
Chronic inflammation has long been considered to causatively link to colon cancer development. However, signal transduction pathways involved remain largely unidentified. Here, we report that p38γ mitogen-activated protein kinase mediates inflammatory signaling to promote colon tumorigenesis. Inflammation activates p38γ in mouse colon tissues and intestinal epithelial cell-specific p38γ knockout (KO) attenuates colitis and inhibits pro-inflammatory cytokine expression. Significantly, p38γ KO inhibits tumorigenesis in a colitis-associated mouse model. The specific p38γ pharmacological inhibitor pirfenidone also suppresses pro-inflammatory cytokine expression and colon tumorigenesis. The tumor-promoting activity of epithelial p38γ was further demonstrated by xenograft studies. In addition, p38γ is required for β-catenin/Wnt activities and p38γ stimulates Wnt transcription by phosphorylating β-catenin at Ser605. These results show that p38γ activation links inflammation and colon tumorigenesis. Targeting p38γ may be a novel strategy for colon cancer prevention and treatment.
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165
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Lu SB, Miao LL, Guo ZN, Qi X, Zhao CJ, Zhang H, Wen SC, Tang DY, Fan DY. Broadband nonlinear optical response in multi-layer black phosphorus: an emerging infrared and mid-infrared optical material. OPTICS EXPRESS 2015; 23:11183-94. [PMID: 25969214 DOI: 10.1364/oe.23.011183] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Black phosphorous (BP), the most thermodynamically stable allotrope of phosphorus, is a high-mobility layered semiconductor with direct band-gap determined by the number of layers from 0.3 eV (bulk) to 2.0 eV (single layer). Therefore, BP is considered as a natural candidate for broadband optical applications, particularly in the infrared (IR) and mid-IR part of the spectrum. The strong light-matter interaction, narrow direct band-gap, and wide range of tunable optical response make BP as a promising nonlinear optical material, particularly with great potentials for infrared and mid-infrared opto-electronics. Herein, we experimentally verified its broadband and enhanced saturable absorption of multi-layer BP (with a thickness of ~10 nm) by wide-band Z-scan measurement technique, and anticipated that multi-layer BPs could be developed as another new type of two-dimensional saturable absorber with operation bandwidth ranging from the visible (400 nm) towards mid-IR (at least 1930 nm). Our results might suggest that ultra-thin multi-layer BP films could be potentially developed as broadband ultra-fast photonics devices, such as passive Q-switcher, mode-locker, optical switcher etc.
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Qi X, Neylon J, Can S, Staton R, Pukala J, Kupelian P, Santhanam A. Feasibility of Margin Reduction for Level II and III Planning Target Volume in Head-and-Neck Image-Guided Radiotherapy – Dosimetric Assessment via A Deformable Image Registration Framework. CURRENT CANCER THERAPY REVIEWS 2015. [DOI: 10.2174/157339471004150407130229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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167
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Qi X, Ji LJ, Zhang X, Ma Y, Ma W. RE: Comparative Effectiveness of Neoadjuvant Therapy for HER2-Positive Breast Cancer: A Network Meta-Analysis. J Natl Cancer Inst 2015; 107:djv038. [DOI: 10.1093/jnci/djv038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhao Y, Qi X, He S, Han G. Letter: TIPSS in hepatocellular carcinoma. Aliment Pharmacol Ther 2015; 41:328. [PMID: 26146697 DOI: 10.1111/apt.13046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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169
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Qi X, Wang JY, Mao RC, Zhang JM. Impact of nucleos(t)ide analogues on the estimated glomerular filtration rate in patients with chronic hepatitis B: a prospective cohort study in China. J Viral Hepat 2015; 22:46-54. [PMID: 25402626 DOI: 10.1111/jvh.12229] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Accepted: 12/12/2013] [Indexed: 01/09/2023]
Abstract
Chronic hepatitis B therapy with nucleos(t)ide analogues, particularly tenofovir or adefovir, may affect renal function. To date, there has not been a head-to-head controlled study to assess estimated glomerular filtration rate (eGFR) fluctuations in nucleos(t)ide-treated CHB patients. We aimed to evaluate the long-term effects of nucleos(t)ide on eGFR in Chinese patients with chronic hepatitis B. This prospective cohort study included 275 patients. Patient subgroups included those treated with lamivudine (n = 50), adefovir (n = 60), telbivudine (n = 68) and entecavir (n = 61); untreated patients (n = 36) served as control. After an average follow-up duration of 23 months, eGFR calculated by Cockcroft-Gault and Modification of Diet in Renal Disease formulas increased by 18.35 mL/min and 19.34 mL/min (P < 0.0001) in the telbivudine group, respectively, and decreased by 10.95 mL/min and 12.17 mL/min (P = 0.0001) in the adefovir group, respectively. Even if renal function was normal or mildly impaired at baseline, eGFR increased significantly more in the telbivudine group than in the other groups (P < 0.001). More patients in the adefovir group (23%) had a ≥20% decrease in eGFR than the other groups (P < 0.0001). More patients in the telbivudine group (31%) had a ≥20% increase in eGFR than the other groups (P < 0.0001). In conclusion, prolonged telbivudine therapy resulted in improved eGFR, while adefovir therapy was associated with decreased eGFR. Lamivudine and entecavir therapy did not significantly influence eGFR.
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Neylon J, Qi X, Sheng K, Staton R, Pukala J, Manon R, Low DA, Kupelian P, Santhanam A. A GPU based high-resolution multilevel biomechanical head and neck model for validating deformable image registration. Med Phys 2014; 42:232-43. [PMID: 25563263 DOI: 10.1118/1.4903504] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Ni X, Qi X, Gu Y, Zheng X, Dong J, Ni Y, Cheng G. [Community structure and phylogenetic analysis of cyanobacteria in cryoconite from surface of the Glacier No. 1 in the Tianshan Mountains]. WEI SHENG WU XUE BAO = ACTA MICROBIOLOGICA SINICA 2014; 54:1256-1266. [PMID: 25752132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE The purpose of this study is to characterize the community composition and phylogenetic analysis of cyanobacteria from supraglacial cryoconite of the Glacier No. 1 in the Tianshan Mountains, China. METHODS We amplified 16S rRNA genes from the extracted cryoconite DNA by PCR with 2 pairs of cyanobacteria-specific primers. Amplificon was used to construct 16S rRNA genes clone library. The estimation of species richness, diversity indices, and rarefaction curve of the 16S rRNA genes library were determined based on representative phylotypes (OTUs). RESULTS Analysis of 16S rRNA gene sequences allowed grouping of 101 clones into 12 phylotypes (OTUs) using a cut-off of 97% identity. The phylogenetic analysis revealed that most of sequences affiliated to the order Oscillatoriales and Chroococcales except that three were unclassified. The clone library was dominated by representatives of the order Oscillatoriales (81% of the total clones), and the most abundant organisms within this order were in the genus Phormidium (68 clones) including clones grouping into four phylotypes. The only clone of Chroococcales was closely related to the genus Chamaesiphon with 97% similarity. In addition, comparison of soil chemical properties between different habitats indicated that supraglacial cryoconite supported significantly higher the content of available phosphorus and potassium, nitrate nitrogen and organic matter compared with the forefield of the Glacier No. 1. CONCLUSION The diversity index of cyanobacteria were relatively high in supraglacial cryoconite of the Glacier No. 1 in the Tianshan Mountains. The community structure was dominated by members of the genus Phormidium. This study may enrich our knowledge on biogeochemical processes and ecological distribution of cyanobacterial populations in glacial ecosystem.
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Blanco V, Chu Z, Vallabhapurapu S, Sulaiman M, Kendler A, Curry R, Warnick R, Franco R, Qi X. NT-06 * PHOSPHATIDYLSERINE-SELECTIVE TARGETING AND ANTICANCER EFFECTS OF SapC-DOPS NANOVESICLES ON BRAIN TUMORS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou265.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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173
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Chang Q, Shao L, Pan Y, Qi X. BI-06 * ATRX LOSS IN CHINESE ADULT DIFFUSE ASTROCYTOMAS CORRELATES WITH IDH1 AND TP53 MUTATION AND PREDICTS BETTER OUTCOME IN TP53 MUTATED PATIENTS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou239.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sulaiman MK, Blanco V, Chu Z, Valabhurapu S, Franco R, Qi X. CS-32 * SapC-DOPS INDUCES Smac-AND Bax-MEDIATED MITOCHONDRIAL APOPTOSIS IN NEUROBLASTOMAS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou242.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Qi X, Gao X, Asaumi J, Zhang M, Li H, Ma M, Li F, Wang X, Wang D. Optimal Clinical Target Volume for the Seminal Vesicles in Localized Prostate Cancer Radiation Therapy: Using CT to Include the Segments Recommended by Pathological Examination. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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