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Xia B, Wu DW, Wang TT, Guo SQ, Wang Y, Yang HL, Xu W, Tian C, Zhang LY, Sun BC, Sotomayor EM, Zhang YZ. [Expressions and prognostic significance of PTEN and PD-1 protein in patients with classical Hodgkin's lymphoma]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2019; 39:839-844. [PMID: 30373357 PMCID: PMC7348287 DOI: 10.3760/cma.j.issn.0253-2727.2018.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
目的 分析肿瘤免疫耐受信号通路的重要因子PD-1和PTEN在经典型霍奇金淋巴瘤(CHL)患者中的表达及其与患者临床特征和预后的相关性。 方法 回顾性分析2003年2月至2013年8月诊治的56例CHL患者的临床资料。采用免疫组织化学染色法检测CHL患者PD-1和PTEN蛋白的表达,采用原位杂交法检测EBV及EBV编码的小mRNA(EBER),并结合患者的临床特征与生存状态进行相关性分析。 结果 ①56例患者中,男34例,女22例,中位年龄25(7~71)岁,PTEN阳性者11例(19.64%),PD-1阳性者14例(25.00%)。②PTEN和PD-1表达呈正相关(rs=0.320,P=0.016);PTEN表达与Ann Arbor分期、IPS评分和有无大包块(≥5 cm)明显相关,PD-1仅与有无大包块相关(P值均<0.05)。③中位随访43(5~86)个月,多因素分析结果显示:年龄≥45岁(P<0.001)、IPS评分>2分(P=0.026)、EBER阳性(P=0.004)、PTEN蛋白高表达(P=0.035)是影响患者5年总生存的不良预后因素,也是影响5年无进展生存的不良预后因素(P值分别为0.007、0.014、0.002、0.024)。 结论 肿瘤免疫逃逸信号通路因子PTEN与CHL患者的预后相关,对CHL患者的预后判断有一定作用,同时也为CHL的免疫治疗提供了新思路和理论依据。
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Tian C, Wang Y, Li JP, Wang SY, Xia B, Yang Y, Li C, Wang Q, Wu YH. [Effects of ascorbic acid on the expression of p53 and Bcl-2 protein in NIH/3T3 cells exposed to nickel]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2018; 36:161-164. [PMID: 29996213 DOI: 10.3760/cma.j.issn.1001-9391.2018.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the protective effect of Ascorbic acid (AA) on the injury of nickel-exposed mouse embryonic fibroblasts (NIH/3T3) . Methods: A model of damage induced by 50 μg/mL nickel refining dust was established to determine the relative survival rate of cells, superoxide dismutase (SOD) , lactate dehydrogenase (LDH) and glutathione peroxidase. (GSH-Px) activity, hydrogen peroxide (H(2)O(2)) and malondialdehyde (MDA) content, and p53 (wild-type) , Bcl-2 protein expression. To investigate the protective effect of different doses of ascorbic acid (25, 50, 100 mmol/L) on nickel-refined dust-induced NIH/3T3 cell injury. Results: The study showed that ascorbic acid Ⅲ group can make the NIH/3T3 cell survival rate increased significantly; Apoptosis rate was reduced; The vitality of SOD and GSH-Px increased significantly, and the difference was statistically significant (P<0.05) . At the same time, the level of MDA and H(2)O(2) and the activity of extracellular LDH enzyme were significantly reduced, and the difference was statistically significant (P<0.05) . The results showed that nickel refining dust induced cell damage through up-regulation of p53 protein and down-regulation of Bcl-2 protein expression; ascorbic acid interventions, the expression level of Bcl-2 protein in ascorbic acid II and III groups was higher than that of nickel refining dust group, and the difference was statistically significant (P<0.05); The expression level of p53 protein in each dose group of ascorbic acid was lower than that of nickel refined dust group, and the difference was statistically significant (P<0.05). Conclusion: With the increase of concentration of ascorbic acid, oxidative damage levels, antioxidant enzyme levels, reduce cell apoptosis, reduce expression of p53, increased expression of Bcl-2. It showed that ascorbic acid had protective effect on NIH/3T3 cell injury induced by nickel refining dust.
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Tian C, Song W, Hou X. The expression and function of AQP7 and AQP9 in granulose cells and oocytes of patients with PCOS. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Huang Y, Tian C, Tarney C, Wang G, Chan J, Bateman N, Conrads T, Hamilton C, Maxwell G, Darcy K. Racial disparities in incidence and mortality in adenocarcinoma or adenosquamous carcinoma compared with squamous cell carcinoma of the cervix. Gynecol Oncol 2018. [DOI: 10.1016/j.ygyno.2018.04.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Tarney C, Tian C, Dubil E, Bateman N, Chan J, Elshaikh M, Cote M, Schildkraut J, Conrads T, Hamilton C, Maxwell G, Darcy K. Impact of age at diagnosis on racial disparities in endometrial cancer patients. Gynecol Oncol 2018. [DOI: 10.1016/j.ygyno.2018.04.307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Phippen N, Tian C, Huang Y, Bateman N, Hamilton C, Maxwell G, Darcy K. Risk stratification in serous ovarian cancer using a classifier based on 30 transcripts. Gynecol Oncol 2018. [DOI: 10.1016/j.ygyno.2018.04.427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Shan LQ, Cai HB, Zhang WS, Tang Q, Zhang F, Song ZF, Bi B, Ge FJ, Chen JB, Liu DX, Wang WW, Yang ZH, Qi W, Tian C, Yuan ZQ, Zhang B, Yang L, Jiao JL, Cui B, Zhou WM, Cao LF, Zhou CT, Gu YQ, Zhang BH, Zhu SP, He XT. Experimental Evidence of Kinetic Effects in Indirect-Drive Inertial Confinement Fusion Hohlraums. PHYSICAL REVIEW LETTERS 2018; 120:195001. [PMID: 29799245 DOI: 10.1103/physrevlett.120.195001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 01/19/2018] [Indexed: 06/08/2023]
Abstract
We present the first experimental evidence supported by simulations of kinetic effects launched in the interpenetration layer between the laser-driven hohlraum plasma bubbles and the corona plasma of the compressed pellet at the Shenguang-III prototype laser facility. Solid plastic capsules were coated with carbon-deuterium layers; as the implosion neutron yield is quenched, DD fusion yield from the corona plasma provides a direct measure of the kinetic effects inside the hohlraum. An anomalous large energy spread of the DD neutron signal (∼282 keV) and anomalous scaling of the neutron yield with the thickness of the carbon-deuterium layers cannot be explained by the hydrodynamic mechanisms. Instead, these results can be attributed to kinetic shocks that arise in the hohlraum-wall-ablator interpenetration region, which result in efficient acceleration of the deuterons (∼28.8 J, 0.45% of the total input laser energy). These studies provide novel insight into the interactions and dynamics of a vacuum hohlraum and near-vacuum hohlraum.
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Shi S, Tian L, Ma L, Tian C. Community Structure of Rhizomicrobiomes in Four Medicinal Herbs and Its Implication on Growth Management. Microbiology (Reading) 2018. [DOI: 10.1134/s0026261718030098] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Bai YP, Zhang Y, Tian C, Xing L, Liu HG. [Cytologic diagnosis of adenoid cystic carcinoma of salivary glands and distinction from basal cell adenoma]. ZHONGHUA BING LI XUE ZA ZHI = CHINESE JOURNAL OF PATHOLOGY 2018; 47:279-283. [PMID: 29690668 DOI: 10.3760/cma.j.issn.0529-5807.2018.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To describe the cytologic features of adenoid cystic carcinoma (ADCC) of salivary glands, and to identify distinguishing cytologic features of ADCC and basal cell adenoma (BCA). Methods: A retrospective review of cytology smears of 30 cases of ADCC and 12 cases of BCA of salivary glands were performed. All cases were collected from Beijing Tongren Hospital, Capital Medical University from January 2010 to January 2017. Except for 2 aspirate smears of ADCC, all were touch imprint smears. All cases had further histological confirmation. Results: Neoplastic ductal cells of ADCC were arranged in three-dimensional clusters, sheets and singles. Hyaline globules were found in most cases (20/30, 66.7%). The nuclei were round to oval, showing varying degrees of nuclear atypia. These included (1) the nuclei were hyperchromatic, demonstrating coarse or slightly coarse, irregularly distributed chromatin; (2) the nuclei were slightly large and vary in size; (3) appearance of the nuclei had a different degree of irregularity (often mild). Nucleoli were common seen (21/30, 70.0%), and were prominent in some cases. Mitosis and necrosis were rare. Cytologically, BCA showed cell arrangements and nuclear features overlapped with those of ADCC. The cytologic difference between these two tumors included: (1) the tumor cells presented rarely in singles; (2) hyaline globules were very uncommon (1/12) in BCA; (3) nuclei of BCA were hypochromatic or slightly hyperchromatic, homogeneous and uniform in appearance and size, overall without nuclear atypia and they were smaller and slender then those of ADCC and (4) individual cells of BCA showed relatively abundant cytoplasm. Conclusions: The cytologic features of ADCC and BCA both overlap and different from each other. Most cases can be diagnosed by cytologic examination. The presence of hyaline globules is an important diagnostic clue of ADCC, although not pathognomonic. Nuclear atypia of neoplastic ductal cells is an essential cytological feature in the diagnosis of ADCC, and is the most reliable point for differential diagnosis of ADCC and BCA.
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Mocanu V, Dang J, Switzer N, Tavakoli I, Tian C, de Gara C, Birch DW, Karmali S. A163 THE ROLE OF ANTIBIOTICS IN ACUTE UNCOMPLICATED DIVERTICULITIS: A SYSTEMATIC REVIEW AND META-ANALYSIS. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.163] [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: 11/15/2022] Open
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Yang XY, Guo CY, Zhang X, Zhong YQ, Tian C. [Effect analysis on Deanxit combined with Shuganjieyu capsule in the treatment of refractory gastroesophageal reflux disease]. ZHONGHUA YI XUE ZA ZHI 2017; 97:3475-3479. [PMID: 29275582 DOI: 10.3760/cma.j.issn.0376-2491.2017.44.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To investigate the curative effect of Deanxit combined with Shuganjieyu capsule on the treatment of refractory gastroesophageal reflux disease. Methods: A total of 125 patients with refractory gastroesophageal reflux disease who had failed in standard lansolazole capsule treatment in the Department of Gastroenterology, First People's Hospital of Neijiang were selected. According to the symptom scores and mood scores of gastroesophageal reflux disease, patients were randomly and double-blindly divided into five groups. Group A(Lansoprazole Capsules + Mosapride Citrate + Deanxit), B(Lansoprazole Capsules + Mosapride Citrate + Shuganjieyu capsule), C(Lansoprazole Capsules + Mosapride Citrate+ Deanxit + Shuganjieyu capsule) and D(Deanxit) groups are study groups, the other was control group (Lansoprazole Capsules + Mosapride Citrate). The scores of symptoms and mood were compared after 4 weeks and 8 weeks of treatment. Results: The clinical symptoms score, HAMA and HAMD scores were significantly lower in the all study groups in comparison to the control group after 4 weeks and 8 weeks therapy. The clinical symptoms score, HAMA and HAMD scores in group C were significantly lower than those in group A and B (P<0.05), while the difference between group A and B was not statistically significant(P>0.05). The HAMA and HAMD scores of group D were significantly higher than those of group A, B, C and control group, and the differences were statistically significant (P<0.05). The total effective rate of study groups were significantly higher than those of the control group, and the difference was statistically significant (P<0.05). The total effective rate of group C was significantly higher than that of group A and B (χ(2)=6.47, P<0.05). The total effective rate of group A at the end of the 8th week was significantly higher than that of group B (χ(2)=6.52, P<0.05). The total effective rate of group D at the end of the 4th and 8th week was significantly lower than those of the group A, B, C and control group, the difference was statistically significant (χ(2)=5.85, P<0.05). Conclusions: Deanxit combined with Shuganjieyu capsule is significantly effective in treatment of refractory gastroesophageal reflux disease, which can effectively improve the total treatment efficiency, reduce the symptom scores and mood scores of gastroesophageal reflux disease patients.
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Wong B, Hu S, Horn P, Rybalsky I, Shellenbarger K, Tian C, Bange J, Kalkwarf H. Body composition of patients with Duchenne muscular dystrophy. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wong B, Signorovitch J, Hu S, Bange J, Rybalsky I, Shellenbarger K, Tian C, Swallow E, Song J, Ward S. Relationships between ambulatory function and body composition in patients with Duchenne muscular dystrophy. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lee I, Hurst A, Wong B, Tian C. Novel compound heterozygous mutations in PLEC gene causing epidermolysis bullosa simplex with muscular dystrophy, case series of two affected sisters. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wu DP, Yan XB, Liu LG, Tian C, Han K, Zhang H, Min DL. TopBP1 promotes malignant progression and correlates with poor prognosis in osteosarcoma. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2017; 21:4022-4031. [PMID: 29028101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE Topoisomerase IIβ binding protein 1 (TopBP1) is involved in DNA damage and replication checkpoint and has been shown to be related to tumorigenesis in many cancer types. This study aimed to evaluate the biological role and clinicopathological significance of TopBP1 in OS. PATIENTS AND METHODS TopBP1 expression in sarcoma patients was determined through the Oncomine database, and the prognostic role of TopBP1 expression was assessed in a retrospective cohort study. CCK-8 assay and colony formation assay were employed to evaluate the effect of TopBP1 on proliferation and chemoresistance in OS cells. Cell apoptosis and cell cycle assay were used to assess the effect of TopBP1 on apoptosis and cycle of OS cells. RESULTS We observed that TopBP1 expression was elevated not only in OS, but also in other sarcoma types including myxofibrosarcoma, liposarcoma, and leiomyosarcoma. Knockdown of TopBP1 using small interfering (si) RNA blocked cell proliferation and colony formation ability, and caused cell apoptosis as well as G1-phase arrest in OS cells. Moreover, TopBP1 knockdown decreased the chemoresistance of OS cells to both doxorubicin and cisplatin. Lastly, the retrospective cohort study showed that high TopBP1 expression was not only associated with high local recurrence and low necrosis rate, but also correlated with poor overall survival and disease-free survival of OS patients. CONCLUSIONS Our findings indicate that TopBP1 contributes to the cell survival and chemoresistance to doxorubicin and cisplatin of OS, suggesting TopBP1 may serve as a novel target for inhibition of progression and chemotherapeutic resistance in OS patients.
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Hay AE, Leung YW, Pater JL, Brown MC, Bell E, Howell D, Kassam Z, Willing S, Tian C, Liu G. Linkage of clinical trial and administrative data: a survey of cancer patient preferences. ACTA ACUST UNITED AC 2017; 24:161-167. [PMID: 28680275 DOI: 10.3747/co.24.3400] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Personal health information, including diagnoses and hospital admissions, is routinely collected in administrative databases. Patients enrolling on clinical trials consent to separate collection and storage of their personal health information. We evaluated patient preferences for linking long-term data from administrative databases with clinical trials. METHODS Adults with cancer attending outpatient clinics at 3 Ontario hospitals were surveyed about their willingness, when faced with the hypothetical scenario of participating in a clinical trial, to provide potentially identifying information such as initials and date of birth to facilitate long-term research access to normally deidentified publicly collected databases. RESULTS Of 569 patients surveyed, 335 (59%) were women, 452 (79%) were white, 385 (68%) had a post-secondary education, and 386 (68%) had never participated in a clinical trial. Median age in the group was 59 years. Most participants (93%, cohort 1) would allow long-term access to their information and allow personal information to be used to match clinical trial with administrative data. At the time of clinical trial closure, two thirds of participants (68%, cohort 2) preferred to make additional clinical information available through linkage with administrative databases, and 8 (9%) preferred to have no further information made available to researchers. No significant differences were found in the subset of patients who were part of a clinical trial and those who had never participated (p = 0.65). INTERPRETATION Almost all patients would allow a clinical trial research team to access their confidential information, providing a more comprehensive assessment of an intervention's long-term risks and benefits.
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Hao NN, Tian C, Lian KX, Han T, Jin S. [Imaging diagnosis of 95 cases of moderate and severe acute carbon monoxide poisoning]. ZHONGHUA LAO DONG WEI SHENG ZHI YE BING ZA ZHI = ZHONGHUA LAODONG WEISHENG ZHIYEBING ZAZHI = CHINESE JOURNAL OF INDUSTRIAL HYGIENE AND OCCUPATIONAL DISEASES 2017; 35:463-467. [PMID: 28780827 DOI: 10.3760/cma.j.issn.1001-9391.2017.06.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To explore the difference of radiological imaging features of delayed encephalopathy after carbon monoxide poisoning (DECMP) and acute carbon monoxide poisoning (ACMP) , and the correlation between the imaging findings and clinical prognosis of the disease. Methods: The correlation between imaging findings and clinical manifestations and prognosis of 95 patients with moderate and severe acute carbon monoxide poisoning were retrospectively analyzed. In the above 95 cases, there were 62 cases of ACMP and 33 cases of DEACMP. All patients underwent conventional CT, MRI and magnetic resonance diffusion tensor imaging (DTI) . Circular regions of interest (ROI) measurement was used for analysis of average diffusion coefficient (ADC) value and fractional anisotropy (FA) value of the MRI and DTI imaging manifestations in different brain regions. Results: The main clinical manifestation of moderate acute carbon monoxide poisoning was consciousness disorder and fatigue; Severe poisoning patients showed deep coma as the main clinical manifestations; The most prominent clinical manifestations of DEACMP were mental disorders and neurological impairment in the extrapyramidal system. A total of 95 cases with moderate or severe CO poisoning showed unilateral or bilateral cerebral cortex, bilateral basal ganglia (white ball) , cerebral white matter around bilateral ventricles or bilateral centrum semiovale, around bilateral ventricles cerebral white matter around bilateral ventricles and bilateral centrum semiovale, cerebral cortex and subcortical involvement. CT showed normal or low density shadow.MRI showed that the lesion T(1)WI presented slightly low or equal signal, T(2)WI and FLAIR sequences showed equal, a slightly higher or high signal; DWI sequence showed slightly higher or high signal. ADC value and FA value in different brain white matter regions of DEACMP group was significantly lower than those of ACMP group (P<0.05) , especially for those around semi oval center and lateral ventricles of the brain white matter (P<0.01) ; The ADC values increased significantly, FA value decreased significantly in the nerve nucleus (P<0.05) , especially for ADC values in globus pallidus (P<0.01) . Conclusion: DTI can evaluate the brain tissue damage in patients with DEACMP more early and more accurately.
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Maxwell G, Wang G, Tian C, Bateman N, Casablanca Y, Havrilesky L, Birrer M, Hamilton C, Conrads T, Darcy K. MS7 a transcript-based diagnostic classifier for metastatic disease and worse progression-free survival in endometrioid endometrial cancer patients. Gynecol Oncol 2017. [DOI: 10.1016/j.ygyno.2017.03.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Huang Y, Dubil E, Tian C, Chan J, Krivak T, Bateman N, Conrads T, Hamilton C, Darcy K, Maxwell G. Racial and ethnic outcome differences in the top five women’s cancers: A harmonized Surveillance, Epidemiology, and End Results study for diagnoses from 2000-2014. Gynecol Oncol 2017. [DOI: 10.1016/j.ygyno.2017.03.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Fan X, Barreto R, Groenewald J, Bezerra J, Pereira O, Cheewangkoon R, Mostert L, Tian C, Crous P. Phylogeny and taxonomy of the scab and spot anthracnose fungus Elsinoë ( Myriangiales, Dothideomycetes). Stud Mycol 2017; 87:1-41. [PMID: 28373739 PMCID: PMC5367849 DOI: 10.1016/j.simyco.2017.02.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Species of Elsinoë are phytopathogens causing scab and spot anthracnose on many plants, including some economically important crops such as avocado, citrus, grapevines, and ornamentals such as poinsettias, field crops and woody hosts. Disease symptoms are often easily recognisable, and referred to as signature-bearing diseases, for the cork-like appearance of older infected tissues with scab-like appearance. In some Elsinoë-host associations the resulting symptoms are better described as spot anthracnose. Additionally the infected plants may also show mild to severe distortions of infected organs. Isolation of Elsinoë in pure culture can be very challenging and examination of specimens collected in the field is often frustrating because of the lack of fertile structures. Current criteria for species recognition and host specificity in Elsinoë are unclear due to overlapping morphological characteristics, and the lack of molecular and pathogenicity data. In the present study we revised the taxonomy of Elsinoë based on DNA sequence and morphological data derived from 119 isolates, representing 67 host genera from 17 countries, including 64 ex-type cultures. Combined analyses of ITS, LSU, rpb2 and TEF1-α DNA sequence data were used to reconstruct the backbone phylogeny of the genus Elsinoë. Based on the single nomenclature for fungi, 26 new combinations are proposed in Elsinoë for species that were originally described in Sphaceloma. A total of 13 species are epitypified with notes on their taxonomy and phylogeny. A further eight new species are introduced, leading to a total of 75 Elsinoë species supported by molecular data in the present study. For the most part species of Elsinoë appear to be host specific, although the majority of the species treated are known only from a few isolates, and further collections and pathogenicity studies will be required to reconfirm this conclusion.
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Dubil E, Tian C, Wang G, Bateman N, Levine D, Conrads T, Hamilton C, Maxwell G, Darcy K. Racial differences in molecular subtypes between black and white patients with endometrial cancer. Gynecol Oncol 2017. [DOI: 10.1016/j.ygyno.2017.03.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Costa M, Chao F, Museux E, Tian C. Nanoscopie MFA : caractérisation in situ de l'évolution de structure du poly(méthyl-3-thiophène) au cours du dopage. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1995920939] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Tian C, Chen YF, Zhao P, Yue ZJ, Wang XF, Meng B, Zhang YZ. [A case report of Glomerular infiltration by intravascular large B-cell lymphoma]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2016; 37:897. [PMID: 27801324 PMCID: PMC7364875 DOI: 10.3760/cma.j.issn.0253-2727.2016.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Tian C, Shellenbarger K, Jefferies J, Sawnani H, McMahon M, Watts N, Wong B. Clinical outcome of 22 years of daily deflazacort treatment in a 32-year-old patient with Duchenne muscular dystrophy. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Li Y, Tian J, Tian H, Chen X, Ping W, Tian C, Lei H. Mutation-based selection and analysis of Komagataeibacter hansenii HDM1-3 for improvement in bacterial cellulose production. J Appl Microbiol 2016; 121:1323-1334. [PMID: 27455093 DOI: 10.1111/jam.13244] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 03/28/2016] [Accepted: 04/10/2016] [Indexed: 11/29/2022]
Abstract
AIMS A low yield of bacterial cellulose (BC) always results from an excessive accumulation of organic acids. Screening and the selection of bacterial mutants with a low accumulation of organic acids is an efficient approach for improving BC production. METHODS AND RESULTS In combination with the proton suicide method (medium containing NaBr-NaBrO3 ), diethyl sulphate chemical mutagenesis coupled with 60 Co-γ irradiation treatment were performed for the screening and selection of desired mutant lines with a high yield of BC. Two high-yield strains, Br-3 and Co-5, as well as a low-yield strain, Br-12, were obtained. Amplified fragment length polymorphism (AFLP) was applied to explore the differences between the mutant lines and the wild type. For the Br-12 line, three specific fragments were verified, corresponding to TonB-dependent transport (TBDT), exopolysaccharides output protein (PePr) and an unknown gene. For Co-5, two specific fragments were matched, acsD and UDP-galactose-4-epimerase. In addition, metabolic analysis for the mutant lines indicated that BC production may be limited by excessive accumulation of organic acids in the fermentation. The limitation would be resolved by the cross-talk of genes involved in BC biosynthesis. CONCLUSIONS Reduced organic acid by-products from glucose in bypasses were found to be responsible for the high-yield BC synthesis in Komagataeibacter hansenii mutant strains. SIGNIFICANCE AND IMPACT OF THE STUDY The metabolic process was varied by mutagenesis-induced gene disruption of the metabolic products. A new idea was provided for the targeted screening and characterization of mutants in the future.
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