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Zhang YL, Liu XJ, An Z. Effects of Soliton Creation on Transient Transport through a Polymer Chain. J Phys Chem B 2024; 128:1812-1817. [PMID: 38324304 DOI: 10.1021/acs.jpcb.3c08121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
By using a nonadiabatic molecular dynamics method combined with the hierarchical equations of motion, we have investigated the nonequilibrium transient transport through a conjugated polymer chain. The polymer chain is described by the Su-Schrieffer-Heeger model, and its two ends are coupled with metal electrodes of different chemical potentials. In order to present the evolutions of the electronic injection and transport in the real-time domain, we have mainly discussed the dynamic relaxation processes of the excited states and transient transport currents. It is found that due to the existence of electron-phonon couplings in the conjugated polymers, creation of solitons not only affects the time of the system achieving the steady state but also leads to periodical oscillations of the steady-state transport currents with time in our simulations. Furthermore, with increasing applied bias voltage, the steady-state transport electronic current increases, which proved that the creation of the solitons can assist the electronic transport. These results have shown that the creation of the excited states is important in understanding the transport properties in organic nanostructures.
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Affiliation(s)
- Y L Zhang
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - X J Liu
- College of Physics, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China
| | - Z An
- College of Physics, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China
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2
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Wusiman D, Guo L, Li L, Zhang X, Zhao X, An Z, Huang Z, Zhang Y, Li Z, Ying J, Wei M, Li W, An C. Clinicopathological and prognostic significance of PD-L1 and TIM-3 expression in medullary thyroid carcinoma: a retrospective immunohistochemistry study. J Endocrinol Invest 2024; 47:91-100. [PMID: 37464189 PMCID: PMC10776706 DOI: 10.1007/s40618-023-02126-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/30/2023] [Indexed: 07/20/2023]
Abstract
PURPOSE Expression of the programmed death-ligand 1 (PD-L1) and T-cell immunoglobulin and mucin-domain containing-3 (TIM-3) in medullary thyroid carcinoma (MTC) has been controversial and rarely reported. METHODS Surgical specimens of 190 MTC patients who had initial curative-intent surgery were collected. Immunohistochemistry of PD-L1 and TIM-3 was performed using 22C3 pharmDx (Dako, Carpinteria, CA) and anti-TIM-3 (1:500, ab241332, Abcam). Stained slides were scored using a combined positive score (CPS) with a cutoff of ≥ 1. We established correlations between PD-L1 expression, TIM-3 expression, clinicopathological, and survival data. RESULTS 13 cases (13/190, 6.84%) were positive for PD-L1 expression, and 42 cases (42/154, 27.27%) for TIM-3 expression. PD-L1 expression was correlated to TIM-3 expression (P = 0.002), but was not related to overall survival (OS) or progression-free survival (PFS). TIM-3 expression was correlated to perineural invasion (P = 0.040). Multivariate Cox analysis showed that lymphovascular invasion (LVI) was independently associated with OS. And tumor size, LVI, and lymph node metastases were significantly associated with PFS. Furthermore, the multivariate logistic analysis showed multifocal status, LVI, pathological T stage and lymph node metastasis were independent risk factors for biochemical recurrence/persistent disease. CONCLUSIONS We demonstrated that PD-L1 and TIM-3 expression were not frequent in MTC and were not associated with survival prognosis. Our results should be considered when clinical trials of PD-L1 or TIM-3 blockades are implemented.
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Affiliation(s)
- D Wusiman
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - L Guo
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - L Li
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - X Zhang
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - X Zhao
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z An
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z Huang
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Y Zhang
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z Li
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - J Ying
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - M Wei
- Department of Head and Neck Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 518116, Shenzhen, China.
| | - W Li
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China.
| | - C An
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China.
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Niu Y, Li X, Zhang H, Xu T, Wei D, An Z, Storey KB. Hepatic transcriptome and gut microbiome provide insights into freeze tolerance in the high-altitude frog, Nanorana parkeri. Comp Biochem Physiol Part D Genomics Proteomics 2023; 48:101147. [PMID: 37797475 DOI: 10.1016/j.cbd.2023.101147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 09/03/2023] [Accepted: 09/29/2023] [Indexed: 10/07/2023]
Abstract
Among amphibians, freeze tolerance is a low-temperature survival strategy that has been well studied in several species. One influence on animal health and survival under adverse conditions is the gut microbiome. Gut microbes can be greatly affected by temperature fluctuations but, to date, this has not been addressed in high-altitude species. Nanorana parkeri (Anura: Dicroglossidae) lives at high altitudes on the Tibetan plateau and shows a good freeze tolerance. In the present study, we addressed two goals: (1) analysis of the effects of whole body freezing on the liver transcriptome, and (2) assess modifications of the gut microbiome as a consequence of freezing. We found that up-regulated genes in liver were significantly enriched in lipid and fatty acid metabolism that could contribute to accumulating the cryoprotectant glycerol and raising levels of unsaturated fatty acids. The results suggest the crucial importance of membrane adaptations and fuel reserves for freezing survival of these frogs. Down-regulated genes were significantly enriched in the immune response and inflammatory response, suggesting that energy-consuming processes are inhibited to maintain metabolic depression during freezing. Moreover, freezing had a significant effect on intestinal microbiota. The abundance of bacteria in the family Lachnospiraceae was significantly increased after freezing exposure, which likely supports freezing survival of N. parkeri. The lower abundance of bacteria in the family Peptostreptococcaceae in frozen frogs may be associated with the hypometabolic state and decreased immune response. In summary, these findings provide insights into the regulatory mechanisms of freeze tolerance in a high-altitude amphibian at the level of gene expression and gut microbiome, and contribute to enhancing our understanding of the adaptations that support frog survival in high-altitude extreme environments.
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Affiliation(s)
- Yonggang Niu
- Department of Life Sciences, Dezhou University, Dezhou, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China.
| | - Xiangyong Li
- Department of Life Sciences, Dezhou University, Dezhou, China; Wuhan National Laboratory for Optoelectronics, China
| | - Haiying Zhang
- Department of Life Sciences, Dezhou University, Dezhou, China
| | - Tisen Xu
- Department of Life Sciences, Dezhou University, Dezhou, China
| | - Dengbang Wei
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Zhifang An
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Kenneth B Storey
- Department of Biology, Carleton University, Ottawa, ON K1S 5B6, Canada
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Wang X, Luo L, Wang Y, An Z. Effect of Platelet Function Testing Guidance on Clinical Outcomes for Patients with Intracranial Aneurysms Undergoing Endovascular Treatment. AJNR Am J Neuroradiol 2023; 44:928-933. [PMID: 37414457 PMCID: PMC10411848 DOI: 10.3174/ajnr.a7923] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 06/01/2023] [Indexed: 07/08/2023]
Abstract
BACKGROUND Platelet function testing has been proposed to better adjust individualized antiplatelet treatment for patients undergoing endovascular treatment for intracranial aneurysms. Its clinical significance needs to be comprehensively evaluated. PURPOSE Our aim was to evaluate the impact of platelet function testing-guided versus standard antiplatelet treatment in patients receiving endovascular treatment for intracranial aneurysms. DATA SOURCES PubMed, EMBASE, and the Cochrane Library of clinical trials were searched from inception until March 2023. STUDY SELECTION Eleven studies comprising 6199 patients were included. DATA ANALYSIS ORs with 95% CIs were calculated using random effects models. DATA SYNTHESIS The platelet function testing-guided group was associated with a decreased rate of symptomatic thromboembolic events (OR = 0.57; 95% CI, 0.42-0.76; I2 = 26%). No significant difference was found in asymptomatic thromboembolic events (OR = 1.07; 95% CI, 0.39-2.94; I2 = 48%), hemorrhagic events (OR = 0.71; 95% CI, 0.42-1.19; I2 = 34%), intracranial hemorrhagic events (OR = 0.61; 95% CI, 0.03-10.79; I2 = 62%), morbidity (OR = 0.53; 95% CI, 0.05-5.72; I2 = 86%), and mortality (OR = 1.96; 95% CI, 0.64-5.97; I2 = 0%) between the 2 groups. Subgroup analysis suggested that platelet function testing-guided therapy may contribute to fewer symptomatic thromboembolic events in patients who received stent-assisted coiling (OR = 0.43; 95% CI, 0.18-1.02; I2 = 43%) or a combination of stent-assisted and flow-diverter stent placement (OR = 0.61; 95% CI, 0.36-1.02; I2 = 0%) or who changed from clopidogrel to other thienopyridines (OR = 0.64; 95% CI, 0.40-1.02; I2 = 18%), though the difference did not reach statistical significance. LIMITATIONS Heterogeneous endovascular treatment methods and adjusted antiplatelet regimens were limitations. CONCLUSIONS Platelet function testing-guided antiplatelet strategy significantly reduced the incidence of symptomatic thromboembolic events without any increase in the hemorrhagic events for patients undergoing endovascular treatment for intracranial aneurysms.
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Affiliation(s)
- X Wang
- From the Departments of Pharmacy (X.W., Z.A.)
| | - L Luo
- Department of Pharmacy (L.L.), Beijing Huairou Hospital, Beijing, China
| | - Y Wang
- Neurosurgery (Y.W.), Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Z An
- From the Departments of Pharmacy (X.W., Z.A.)
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5
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Wu Y, Lv K, Zheng B, Hao X, Lai W, Xia X, Yang G, Huang S, Luo Z, Yang G, Lv C, An Z, Peng W, Song T, Yuan Q. Development and validation of a clinical nomogram predicting detrusor underactivity via symptoms and noninvasive test parameters in men with benign prostatic hyperplasia. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00080-5] [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: 02/12/2023]
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Gao B, Jiao TY, Li YT, Chen H, Lin WP, An Z, Ru LH, Zhang ZC, Tang XD, Wang XY, Zhang NT, Fang X, Xie DH, Fan YH, Ma L, Zhang X, Bai F, Wang P, Fan YX, Liu G, Huang HX, Wu Q, Zhu YB, Chai JL, Li JQ, Sun LT, Wang S, Cai JW, Li YZ, Su J, Zhang H, Li ZH, Li YJ, Li ET, Chen C, Shen YP, Lian G, Guo B, Li XY, Zhang LY, He JJ, Sheng YD, Chen YJ, Wang LH, Zhang L, Cao FQ, Nan W, Nan WK, Li GX, Song N, Cui BQ, Chen LH, Ma RG, Zhang ZC, Yan SQ, Liao JH, Wang YB, Zeng S, Nan D, Fan QW, Qi NC, Sun WL, Guo XY, Zhang P, Chen YH, Zhou Y, Zhou JF, He JR, Shang CS, Li MC, Kubono S, Liu WP, deBoer RJ, Wiescher M, Pignatari M. Deep Underground Laboratory Measurement of ^{13}C(α,n)^{16}O in the Gamow Windows of the s and i Processes. Phys Rev Lett 2022; 129:132701. [PMID: 36206440 DOI: 10.1103/physrevlett.129.132701] [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: 10/13/2021] [Revised: 04/01/2022] [Accepted: 06/01/2022] [Indexed: 06/16/2023]
Abstract
The ^{13}C(α,n)^{16}O reaction is the main neutron source for the slow-neutron-capture process in asymptotic giant branch stars and for the intermediate process. Direct measurements at astrophysical energies in above-ground laboratories are hindered by the extremely small cross sections and vast cosmic-ray-induced background. We performed the first consistent direct measurement in the range of E_{c.m.}=0.24 to 1.9 MeV using the accelerators at the China Jinping Underground Laboratory and Sichuan University. Our measurement covers almost the entire intermediate process Gamow window in which the large uncertainty of the previous experiments has been reduced from 60% down to 15%, eliminates the large systematic uncertainty in the extrapolation arising from the inconsistency of existing datasets, and provides a more reliable reaction rate for the studies of the slow-neutron-capture and intermediate processes along with the first direct determination of the alpha strength for the near-threshold state.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - R J deBoer
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - M Wiescher
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
- Wolfson Fellow of Royal Society, School of Physics and Astronomy, University of Edinburgh, King's Buildings, Edinburgh EH9 3FD, United Kingdom
| | - M Pignatari
- Konkoly Observatory, Research Centre for Astronomy and Earth Sciences (CSFK), Eötvös Loránd Research Network (ELKH), Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary
- CSFK, MTA Centre of Excellence, Budapest, Konkoly Thege Miklós út 15-17, Budapest H-1121, Hungary
- E. A. Milne Centre for Astrophysics, Department of Physics and Mathematics, University of Hull, Hull, HU6 7RX, United Kingdom
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Chen X, An Z, Wei L, Zhang J, Li J, Wang Z, Gao C, Wei D. Vitamin D 3 Metabolic Enzymes in Plateau Zokor ( Myospalax baileyi) and Plateau Pika ( Ochotona curzoniae): Expression and Response to Hypoxia. Animals (Basel) 2022; 12:ani12182371. [PMID: 36139230 PMCID: PMC9495108 DOI: 10.3390/ani12182371] [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: 08/03/2022] [Revised: 09/02/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Vitamin D3 (D3) is produced endogenously from 7-dehydrocholesterol by irradiation and is an important secosteroid for the absorption of calcium and phosphate. Lithocholic acid (LCA) increases intestinal paracellular calcium absorption in a vitamin D receptor-dependent manner in vitamin D-deficient rats. The plateau zokor (Myospalax baileyi), a strictly subterranean species, and plateau pika are endemic to the Qinghai-Tibet Plateau. To verify whether the zokors were deficient in D3 and reveal the effects of hypoxia on D3 metabolism in the zokors and pikas, we measured the levels of 25(OH)D3, calcium, and LCA, and quantified the expression levels of D3 metabolism-related genes. The results showed an undetectable serum level of 25(OH)D3 and a significantly higher concentration of LCA in the serum of plateau zokor, but its calcium concentration was within the normal range compared with that of plateau pika and Sprague-Dawley rats. With increasing altitude, the serum 25(OH)D3 levels in plateau pika decreased significantly, and the mRNA and protein levels of CYP2R1 (in the liver) and CYP27B1 (in the kidney) in plateau pika decreased significantly. Our results indicate that plateau zokors were deficient in D3 and abundant in LCA, which might be a substitution of D3 in the zokor. Furthermore, hypoxia suppresses the metabolism of D3 by down-regulating the expression of CYP2R1 and CYP27B1 in plateau pika.
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Affiliation(s)
- Xiaoqi Chen
- Research Center for High Altitude Medicine, Qinghai University, Xining 810016, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Zhifang An
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Linna Wei
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Jiayu Zhang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Jimei Li
- Research Center for High Altitude Medicine, Qinghai University, Xining 810016, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Zhijie Wang
- Research Center for High Altitude Medicine, Qinghai University, Xining 810016, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Conghui Gao
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Dengbang Wei
- Research Center for High Altitude Medicine, Qinghai University, Xining 810016, China
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
- Correspondence: ; Tel.: +86-971-531-0695
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8
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An Z, Chen X, Li J. Response to Different Oxygen Partial Pressures and Evolution Analysis of Apoptosis-Related Genes in Plateau Zokor ( Myospalax baileyi). Front Genet 2022; 13:865301. [PMID: 35754836 PMCID: PMC9214310 DOI: 10.3389/fgene.2022.865301] [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: 01/29/2022] [Accepted: 04/28/2022] [Indexed: 11/30/2022] Open
Abstract
The plateau zokor (Myospalax baileyi) is a native species of the Qinghai–Tibet Plateau that spends its entire life underground in sealed burrows with hypoxic conditions. The present study aimed to assess the sequence characteristics of apoptosis-related genes and the response to different oxygen partial pressures (pO2) in plateau zokor and Sprague-Dawley rats. The sequences of the p53-induced protein with a death domain (Pidd), p53-upregulated modulator of apoptosis (Puma), insulin-like growth factor binding protein 3 (Igfbp3), and apoptosis protease-activating factor 1 (Apaf1) were evaluated concerning homology and convergent evolution sites, and their mRNA levels were evaluated in different tissues under 14.13 (3,300 m) and 16.12 kPa (2,260 m) pO2 conditions. Our results showed that, (1) the sequences of the apoptosis-related genes in plateau zokor were highly similar to those of Nannospalax galili, followed by Rattus norvegicus; (2). Pidd, Puma, Igfbp3, and Apaf1 of plateau zokor were found to have five, one, two, and five convergent sites in functional domains with N. galili, respectively. Lastly (3), under low pO2, the expression of Pidd and Puma was downregulated in the lung of plateau zokors. In turn, Igfbp3 and Apaf1 were upregulated in the liver and lung, and Puma was upregulated in the skeletal muscle of plateau zokor under low pO2. In Sprague-Dawley rats, low pO2 downregulated Puma and Apaf1 expression in the liver and downregulated Igfbp3 and Puma in the lung and skeletal muscle separately. In contrast, low pO2 upregulated Pidd expression in the liver and skeletal muscle of Sprague-Dawley rats. Overall, the expression patterns of Apaf1, Igfbp3, and Puma showed the opposite pattern in the liver, lung, and skeletal muscle, respectively, of plateau zokor as compared with Sprague-Dawley rats. In conclusion, for the long-time adaptation to hypoxic environments, Pidd, Puma, Igfbp3, and Apaf1 of plateau zokor underwent convergent evolution, which we believe may have led to upregulation of their levels under low oxygen partial pressures to induce apoptosis, so as to suppress tumorigenesis under hypoxic environments in plateau zokor.
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Affiliation(s)
- Zhifang An
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Xiaoqi Chen
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China.,Department of Obstetrics and Gynaecology, Affiliated Hospital of Qinghai University, Xining, China.,Research Center for High Altitude Medicine, Qinghai University, Xining, China
| | - Jimei Li
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China.,Research Center for High Altitude Medicine, Qinghai University, Xining, China.,Department of General Medicine, Qinghai Provincial People's Hospital, Xining, China
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9
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Vicencio JM, Evans R, Green R, An Z, Deng J, Treacy C, Mustapha R, Monypenny J, Costoya C, Lawler K, Ng K, De-Souza K, Coban O, Gomez V, Clancy J, Chen SH, Chalk A, Wong F, Gordon P, Savage C, Gomes C, Pan T, Alfano G, Dolcetti L, Chan JNE, Flores-Borja F, Barber PR, Weitsman G, Sosnowska D, Capone E, Iacobelli S, Hochhauser D, Hartley JA, Parsons M, Arnold JN, Ameer-Beg S, Quezada SA, Yarden Y, Sala G, Ng T. Osimertinib and anti-HER3 combination therapy engages immune dependent tumor toxicity via STING activation in trans. Cell Death Dis 2022; 13:274. [PMID: 35347108 PMCID: PMC8960767 DOI: 10.1038/s41419-022-04701-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/07/2022] [Accepted: 03/01/2022] [Indexed: 11/28/2022]
Abstract
Over the past decade, immunotherapy delivered novel treatments for many cancer types. However, lung cancer still leads cancer mortality, and non-small-cell lung carcinoma patients with mutant EGFR cannot benefit from checkpoint inhibitors due to toxicity, relying only on palliative chemotherapy and the third-generation tyrosine kinase inhibitor (TKI) osimertinib. This new drug extends lifespan by 9-months vs. second-generation TKIs, but unfortunately, cancers relapse due to resistance mechanisms and the lack of antitumor immune responses. Here we explored the combination of osimertinib with anti-HER3 monoclonal antibodies and observed that the immune system contributed to eliminate tumor cells in mice and co-culture experiments using bone marrow-derived macrophages and human PBMCs. Osimertinib led to apoptosis of tumors but simultaneously, it triggered inositol-requiring-enzyme (IRE1α)-dependent HER3 upregulation, increased macrophage infiltration, and activated cGAS in cancer cells to produce cGAMP (detected by a lentivirally transduced STING activity biosensor), transactivating STING in macrophages. We sought to target osimertinib-induced HER3 upregulation with monoclonal antibodies, which engaged Fc receptor-dependent tumor elimination by macrophages, and STING agonists enhanced macrophage-mediated tumor elimination further. Thus, by engaging a tumor non-autonomous mechanism involving cGAS-STING and innate immunity, the combination of osimertinib and anti-HER3 antibodies could improve the limited therapeutic and stratification options for advanced stage lung cancer patients with mutant EGFR.
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Affiliation(s)
- J M Vicencio
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK.
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK.
| | - R Evans
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - R Green
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - Z An
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - J Deng
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Treacy
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - R Mustapha
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - J Monypenny
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Costoya
- Cancer Immunology Unit, Cancer Institute, University College London, London, UK
| | - K Lawler
- Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, UK
| | - K Ng
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - K De-Souza
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - O Coban
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - V Gomez
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - J Clancy
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - S H Chen
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - A Chalk
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - F Wong
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - P Gordon
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Savage
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Gomes
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - T Pan
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - G Alfano
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - L Dolcetti
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - J N E Chan
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - F Flores-Borja
- Centre for Immunobiology and Regenerative Medicine, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - P R Barber
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - G Weitsman
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - D Sosnowska
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - E Capone
- Department of Innovative Technologies in Medicine & Dentistry, University of Chieti-Pescara, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | | | - D Hochhauser
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - J A Hartley
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - M Parsons
- Randall Centre for Cell and Molecular Biophysics, King's College London, London, UK
| | - J N Arnold
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - S Ameer-Beg
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - S A Quezada
- Cancer Immunology Unit, Cancer Institute, University College London, London, UK
| | - Y Yarden
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot, Israel
| | - G Sala
- Department of Innovative Technologies in Medicine & Dentistry, University of Chieti-Pescara, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - T Ng
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK.
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK.
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Li J, An Z, Wei L, Xu B, Wang Z, Gao C, Wei L, Qi D, Shi P, Zhang T, Wei D. A New Homotetramer Hemoglobin in the Pulmonary Surfactant of Plateau Zokors (Myospalax Baileyi). Front Genet 2022; 13:824049. [PMID: 35368669 PMCID: PMC8967358 DOI: 10.3389/fgene.2022.824049] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 12/08/2021] [Accepted: 01/27/2022] [Indexed: 11/13/2022] Open
Abstract
The plateau zokor (Myospalax baileyi) is a native species to the Qinghai-Tibetan Plateau, inhabiting hypoxia and hypercapnia sealed subterranean burrows that pose several unique physiological challenges. In this study, we observed a novel heme-containing protein in the pulmonary surfactant (PS) of plateau zokor, identified the encoding gene of the protein, predicted its origination and structure, verified its expression in alveolar epithelial cells, and determined the protein’s affinity to oxygen and its effect on the oxygen-dissolving capability in the PS of plateau zokors. The protein is an unusual homotetramer hemoglobin consisting of four γ-like subunits, and the subunit is encoded by a paralog gene of γ, that is γ-like. The divergence time of γ-like from γ is estimated by the molecular clock to be about 2.45 Mya. The generation of γ-like in plateau zokors might well relate to long-time stress of the high land hypoxia. Unlike γ, the γ-like has a hypoxia response element (HRE) and a lung tissue-specific enhancer in its upstream region, and it is expressed specifically in lung tissues and up-regulated by hypoxia. The protein is named as γ4-like which is expressed specifically in Alveolar epithelial type II (ATII) cells and secreted into the alveolar cavities through the osmiophilic multilamellar body (LBs). The γ4-like has a higher affinity to oxygen, and that increases significantly oxygen-dissolving capability in the PS of plateau zokors by its oxygenation function, which might be beneficial for the plateau zokors to obtain oxygen from the severe hypoxia environments by facilitating oxygen diffusion from alveoli to blood.
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Affiliation(s)
- Jimei Li
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
- Research Center for High Altitude Medicine, Qinghai University, Xining, China
| | - Zhifang An
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Linna Wei
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Bo Xu
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
| | - Zhijie Wang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Conghui Gao
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Lian Wei
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Delin Qi
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Peng Shi
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
- *Correspondence: Dengbang Wei, ; Tongzuo Zhang, ; Peng Shi,
| | - Tongzuo Zhang
- Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China
- *Correspondence: Dengbang Wei, ; Tongzuo Zhang, ; Peng Shi,
| | - Dengbang Wei
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
- Research Center for High Altitude Medicine, Qinghai University, Xining, China
- *Correspondence: Dengbang Wei, ; Tongzuo Zhang, ; Peng Shi,
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11
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Liu B, Ding W, An Z, Zhu J, Zhang Z, Li L, Lin W. Tritium analysis in zirconium film with BIXS and EBS: Generality test of Al thin film as the β-ray stopping layer in BIXS. Fusion Engineering and Design 2021. [DOI: 10.1016/j.fusengdes.2021.112751] [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] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Zeng Y, He H, Wang X, Zhang M, An Z. Climate and air pollution exposure are associated with thyroid function parameters: a retrospective cross-sectional study. J Endocrinol Invest 2021; 44:1515-1523. [PMID: 33159683 DOI: 10.1007/s40618-020-01461-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/26/2020] [Indexed: 02/05/2023]
Abstract
OBJECTIVES There are still controversies about the impact of climatic and environmental factors on thyroid function parameters in healthy populations. We investigated the relationships between climate, air pollution exposure, and thyroid function fluctuations. METHODS We retrospectively reviewed 327,913 individuals attending routine health checks from December 2013 to December 2018. We analyzed the associations between thyroid function and climatic factors using Spearman's correlation analysis. We explored the relationships between thyroid function and air pollution exposure using multiple linear regression analysis, after adjusting for age, sex, season, and outdoor temperature. We also performed subgroup analyses by age and sex and sensitivity analyses of different anti-thyroid peroxidase antibody status. RESULTS Thyroid-stimulating hormone (TSH) and free triiodothyronine (FT3) were negatively associated with outdoor temperature (r = - 0.66, P < 0.001; r = - 0.55, P < 0.001), while free thyroxine (FT4) and FT4/FT3 were positively associated with temperature (r = 0.35, P < 0.001; r = 0.79, P < 0.001). An increase of 10 μg/m3 in fine particulate matter ≤ 2.5 μm (PM2.5) was associated with a decrease of 0.12 pmol/L in FT4 and an increase of 0.07 pmol/L in FT3 (both P < 0.01). FT4/FT3 was significantly negatively associated with PM2.5 (coefficient: - 0.06, P < 0.01). These results remained robust in hierarchical analyses and sensitivity analyses. CONCLUSIONS Thyroid function parameters are associated with climate and air pollution exposure. These factors may influence variations in thyroid function. Our results also highlight the importance of public health interventions to reduce air pollution.
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Affiliation(s)
- Y Zeng
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China
| | - H He
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China
| | - X Wang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China
| | - M Zhang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China.
| | - Z An
- Department of Endocrine and Metabolism, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China.
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13
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Ning XP, An Z, Qiao F, Cai CL, Han L, Song ZG, Li BL, Zhou GW, Wang J, Xu ZY, Lu FL. [Safety and efficacy of transcatheter tricuspid valve replacement with LuX-Valve in patients with severe tricuspid regurgitation]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:455-460. [PMID: 34034378 DOI: 10.3760/cma.j.cn112148-20210125-00091] [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: 11/05/2022]
Abstract
Objectives: To evaluate the safety and efficacy of LuX-Valve on the treatment of severe tricuspid regurgitation (TR). Methods: This is a prospective observational study. From September 2018 to March 2019, 12 patients with severe TR, who were not suitable for surgery, received LuX-Valve implantation in Changhai Hospital. LuX-Valve was implanted under general anesthesia and the guidance of transesophageal echocardiography and X-ray fluoroscopy. Access to the tricuspid valve was achieved via a minimally invasive thoracotomy and transatrial approach. Main endpoints were surgery success and device success. Surgery success was defined as successful implanting the device and withdrawing the delivery system, positioning the valve correctly and stably without severe or life-threatening adverse events. Device success was defined as satisfied valve function (TR severity reduction ≥ 2 grades, tricuspid gradient ≤ 6 mmHg (1 mmHg=0.133 kPa)), absence of malposition, valve failure and reintervention, major adverse events including device related mortality, embolization, conduction system disturbances and new onset shunt across ventricular septum at day 30 post implantation. Results: A total of 12 patients with severe to torrential TR were included in this study. The age was (68.5±6.9) years and 7 were female. All patients had typical right heart failure symptoms. Procedural success was achieved in all cases, there was no intraprocedural mortality or transfer to open surgery. TR significantly improved after LuX-Valve implantation (none/trivial in 8 patients, mild in 3 patients and moderate in 1 patient). The average device time was (9.2±4.2) minutes. Intensive care unit duration was 3.0 (2.0, 4.8) days. One patient died at postoperative day 18 due to non-surgery and device reasons. Transthoracic echocardiography at 30 days after operation showed that TR was significantly reduced (none/trivial in 8 patients, mild in 2 patients and moderate in 1 patient) and device success was achieved in 11 cases. All survived patients experienced a significant improvement in life quality with significantly improvement in New York Heart Association (NYHA) classification (Ⅰ and Ⅱ: 6/11 post operation vs. 0/11 before operation, P=0.012) and there were no device related complications in this patient cohort. Conclusions: LuX-Valve implantation is feasible, safe and effective for the treatment of patients with severe TR.
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Affiliation(s)
- X P Ning
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Z An
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - F Qiao
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - C L Cai
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - L Han
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Z G Song
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - B L Li
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - G W Zhou
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - J Wang
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Z Y Xu
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - F L Lu
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
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Wang X, Sun L, He N, An Z, Yu R, Li C, Li Y, Li Y, Liu X, Fang X, Zhao J. Increased expression of CXCL2 in ACPA-positive rheumatoid arthritis and its role in osteoclastogenesis. Clin Exp Immunol 2020; 203:194-208. [PMID: 33010041 DOI: 10.1111/cei.13527] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/29/2020] [Accepted: 09/13/2020] [Indexed: 12/16/2022] Open
Abstract
Anti-citrullinated protein/peptide antibodies (ACPA) play important roles in the pathogenesis of rheumatoid arthritis (RA). ACPA-positive (ACPA+ ) and ACPA-negative (ACPA- ) RA were suggested to be different disease subsets, with distinct differences in genetic variation and clinical outcomes. The aims of the present study were to compare gene expression profiles in ACPA+ and ACPA- RA, and to identify novel candidate gene signatures that might serve as therapeutic targets. Comprehensive transcriptome analysis of peripheral blood mononuclear cells (PBMCs) from ACPA+ and ACPA- RA patients and healthy controls was performed via RNA sequencing. A validation cohort was used to further investigate differentially expressed genes via polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA). Spearman's correlation test was used to evaluate the correlation of differentially expressed genes and the clinical and laboratory data of the patients. The role of differentially expressed genes in osteoclastogenesis was further investigated. Expression of C-X-C motif chemokine ligand 2 (CXCL2) was significantly increased in ACPA+ RA than in ACPA- RA, which was validated in PBMCs and serum. CXCL2 promoted the migration of CD14+ monocytes and increased osteoclastogenesis in RA patients. RAW264.7 macrophages were used to investigate specific mechanisms, and the results suggested that CXCL2 stimulated osteoclastogenesis via extracellular receptor kinase (ERK) mitogen-activated protein kinase (MAPK) and nuclear factor kappa B pathways. In conclusion, CXCL2 was highly expressed in ACPA+ RA than in ACPA- RA. CXCL2 promoted osteoclastogenesis and was related to bone erosion in RA, which suggests that the blockade of CXCL2 might be a novel strategy for the treatment of RA.
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Affiliation(s)
- X Wang
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - L Sun
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - N He
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Z An
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - R Yu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - C Li
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - Y Li
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Y Li
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - X Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - X Fang
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - J Zhao
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
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15
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Jiang J, Riquelme M, An Z, Zhang N, Xiong W, Zhang Y, Wang C. New antibody therapeutics targeting connexin hemichannels in treatment of osteosarcoma and breast cancer bone metastasis. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)31221-1] [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: 11/15/2022]
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16
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Feng S, An Z, Li Y, Jiao W, Deng J, Qi D. Complete mitochondrial genome of Gymnodiptychus pachycheilus weiheensis (Teleostei: Cypriniformes: Cyprinidae). Mitochondrial DNA B Resour 2020. [DOI: 10.1080/23802359.2020.1750982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Affiliation(s)
- Shuo Feng
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Zhifang An
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Yang Li
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Wanyao Jiao
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Jianjian Deng
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Delin Qi
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
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17
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An Z, Feng S, Wang Y, Li Y, Deng J, Wang W. Complete mitochondrial genome of Gymnocypris waddellii (Cypriniformes: Cyprinidae). Mitochondrial DNA B Resour 2020. [DOI: 10.1080/23802359.2020.1750980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Affiliation(s)
- Zhifang An
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Shuo Feng
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Yan Wang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Yang Li
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Jianjian Deng
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
| | - Wen Wang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai, China
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18
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Chen J, Liu X, Fu S, An Z, Feng Y, Wang R, Ji P. Effects of sophorolipids on fungal and oomycete pathogens in relation to pH solubility. J Appl Microbiol 2020; 128:1754-1763. [PMID: 31995843 DOI: 10.1111/jam.14594] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 10/14/2019] [Revised: 12/30/2019] [Accepted: 01/17/2020] [Indexed: 11/28/2022]
Abstract
AIMS The objective of this study was to determine the effects of sophorolipids on several fungal and oomycete plant pathogens and the relationship between sophorolipids at different pH and antimicrobial activities. METHODS AND RESULTS Sophorolipids had different solubility at different pH with a dramatic increase in solubility when pH was 6 or higher. Inhibition of mycelial growth of Phytophthora infestans by sophorolipids was affected by pH values, showing that when the pH value was higher, the inhibition rate was lower. Sophorolipids inhibited spore germination and mycelial growth of several fungal and oomycete pathogens in vitro including Fusarium sp., F. oxysporum, F. concentricum, Pythium ultimum, Pyricularia oryzae, Rhizoctorzia solani, Alternaria kikuchiana, Gaeumannomyces graminis var. tritici and P. infestans and caused morphological changes in hyphae by microscope observation. Sophorolipids reduced β-1,3-glucanase activity in mycelia of P. infestans. In greenhouse studies, foliar application of sophorolipids at 3 mg ml-1 reduced severity of late blight of potato caused by P. infestans significantly. CONCLUSION Sophorolipids influenced spore germination and hyphal tip growth of several plant pathogens and pH solubility of sophorolipids had an effect on their efficacy. Application of sophorolipids reduced late blight disease on potato under greenhouse conditions. SIGNIFICANCE AND IMPACT OF THE STUDY The findings indicated that sophorolipids have the potential to be developed as a convenient and easy-to-use formulation for managing plant diseases.
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Affiliation(s)
- J Chen
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Department of Plant Pathology, University of Georgia, Tifton, GA, USA
| | - X Liu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - S Fu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Z An
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Y Feng
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - R Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - P Ji
- Department of Plant Pathology, University of Georgia, Tifton, GA, USA
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Park W, An Z. Radiobiological Difference Between Flattening Filter Free (FFF) Vs. Flattening Filter (FF) X-Ray Beams in Lung Cancer Cells. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Chen Y, Song XT, Yao YM, Huang L, An Z, Yuan J, Xiong B, Liu YH, Zhang YQ. [Mortality and influencing factors on injecting drug users with HIV/AIDS in Guizhou province, 1996-2015]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:765-769. [PMID: 31357795 DOI: 10.3760/cma.j.issn.0254-6450.2019.07.006] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the mortality and influencing factors on injecting drug users (IDUs) with HIV/AIDS, in Guizhou province, 1996-2015. Methods: A retrospective cohort study was conducted on IDUs with HIV/AIDS that were reported through national comprehensive HIV/AIDS information system, in Guizhou province during 1996-2015. Cox proportional hazard regression model was used to analyze the influencing factors on the mortality of HIV/AIDS. Results: A total of 3 958 cases of IDUs with HIV/AIDS were recruited in this study, with all-cause mortality rate of 44.01% (1 742/3 958) and total mortality rate of 7.80/100 person-years, respectively. The median survival time between diagnosis and death was 8.08 years. Mortality rate was 3.57/100 person-years in the group receiving antiretroviral therapy (ART). The mortality appeared to be 4.08/100 person-years in the group who were on methadone maintenance treatment (MMT). Data from the multiple regression analysis indicated that factors of gender, ethnicity, age when HIV/AIDS diagnosis was made, CD(4)(+)T lymphocyte (CD(4)) count at the first testing, ART and MMT were significantly associated with deaths among these people. The risk of death in females was 0.82 times (95%CI: 0.69-0.98) higher than that in males. The risk of deaths among the ethnic minority subjects was 1.39 times (95%CI: 1.21-1.60) higher than that of the Hans. The risk of death appeared to be 2.44 times higher (95%CI: 1.07-5.56) in the over-50-year of age group than in the <20 year-old group, when HIV/AIDS was diagnosed for the first time. The risk of death in CD(4) ≥500/μl group in the first time was 0.27 times (95%CI: 0.22-0.32) more than CD(4) <200/μl group in the firs time. The risk of death in cases who were treated with ART or MMT was 2.83 times (95%CI: 2.45-3.26) and 1.35 times (95%CI: 1.15-1.59) higher than those who did not receive any treatment, respectively. Conclusion: Higher risks on death seemed to be related to the following factors: being male, older age at the time of diagnosis, lower CD(4) at diagnosis, not on ART or MMT among the IDUs with HIV/AIDS in Guizhou province, between 1996-2015.
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Affiliation(s)
- Y Chen
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang 550001, China
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Feng S, An Z, Wang Y, Liang J. Complete mitochondrial genome of Schizothorax davidi (Teleostei: Cypriniformes: Cyprinidae). Mitochondrial DNA B Resour 2019; 4:3210-3211. [PMID: 33365923 PMCID: PMC7707262 DOI: 10.1080/23802359.2019.1668729] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study provides a mitochondrial complete genome of Schizothorax davidi. The complete genome is 16,576 bp in length with an A + T content of 54.9%, which contains 13 protein-coding genes, 22 tRNA genes, and 2 rRNA genes. The phylogenetic analysis indicated that S. davidi is closely related to Schizothorax lissolabiatus. These results contribute to explore the adaptation strategy of S. davidi on the conditions of Qinghai-Tibet Plateau.
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Affiliation(s)
- Shuo Feng
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Zhifang An
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Yue Wang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
| | - Jian Liang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
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Li S, Xu B, An Z, Wang Z, Li Y, Wei L, Wei D. Evolutionary analysis of TSP-1 gene in Plateau zokor (MyospalaxBaileyi) and its expression pattern under hypoxia. Cell Mol Biol (Noisy-le-grand) 2019; 65:48-57. [PMID: 30942155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 03/19/2019] [Accepted: 03/19/2019] [Indexed: 06/09/2023]
Abstract
The plateau zokor (Myospalaxbaileyi) is a specialized subterranean rodent that lives on the Qinghai-Tibet Plateau, and has successfully adapted to hypoxic environment. Raised expression of vascular endothelial growth factor (VEGF) and enhanced microvessel density (MVD) in tissues enable subterranean rodents to adapt to hypoxic sealed burrows. However, the expression of VEGF is inhibited by decreases in oxygen content, which is different from what obtains in Sprague Dawley (SD)rats. Thromspondin-1(TSP-1) is the first endogenous angiogenesis inhibitor identified inp53 pathway. It has several domains that bind to different proteins which regulate cell-to-cell interactions, inhibit endothelial cell proliferation and induce endothelial cell apoptosis (anti-angiogenesis). In this study, we analyzed the coding region and the expression pattern of TSP-1 gene in plateau zokor under different oxygen partial pressures using bioinformatics and qRT-PCR, respectively. Our results showed that the base and amino acid homologies between plateau zokor and Northern Israeli blind subterranean mole rat (Nannospalaxgalili) were 95.08 and 97.61%, respectively. There were eight parallel evolution sites with Nannospalaxgalili. Evaluation by 'Sorting Tolerant From Intolerant' (SIFT) algorithm showed four sites with significant effects on the function of TSP-1. Three-dimensional (3D) structures revealed that Asp185 and Thr270 were located in the NH2 terminal domain, with Glu536 in the Type I repeat domain, and Thr1092 in the COOH terminal domain. Compared to SD rats, the polarities of these four mutation sites changed. The expression levels of TSP-1 in plateau zokor tissues increased significantly from 2 260 m(16.12kPa) to 3 300 m(14.13kPa), but there was no significant difference in TSP-1 expression in SD rats. In conclusion, due to long-term adaption to the hypoxic environment of sealed burrows, plateau zokor upregulates the expression of TSP-1 to effect anti-angiogenesis. Moreover, mutations in gene structure of TSP-1 may play an important role in inhibiting angiogenesis.
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Affiliation(s)
- Suhua Li
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, 251 Ningda Road, Xining, Qinghai 810016, China
| | - Bo Xu
- College of Eco-Environmental Engineering, Qinghai University, 251 Ningda Road, Xining, Qinghai 810016, China
| | - Zhifang An
- Research Center for High Altitude Medicine, Qinghai University, 251 Ningda Road, Xining, Qinghai 810016, China
| | - Zhijie Wang
- College of Eco-Environmental Engineering, Qinghai University, 251 Ningda Road, Xining, Qinghai 810016, China
| | - Yongxiao Li
- College of Eco-Environmental Engineering, Qinghai University, 251 Ningda Road, Xining, Qinghai 810016, China
| | - Lian Wei
- College of Eco-Environmental Engineering, Qinghai University, 251 Ningda Road, Xining, Qinghai 810016, China
| | - Dengbang Wei
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, 251 Ningda Road, Xining, Qinghai 810016, China
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Li S, Xu B, An Z, Wang Z, Li Y, Wei L, Wei D. Evolutionary analysis of TSP-1 gene in Plateau zokor (MyospalaxBaileyi) and its expression pattern under hypoxia. Cell Mol Biol (Noisy-le-grand) 2019. [DOI: 10.14715/cmb/2019.65.3.7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The plateau zokor (Myospalaxbaileyi) is a specialized subterranean rodent that lives on the Qinghai-Tibet Plateau, and has successfully adapted to hypoxic environment. Raised expression of vascular endothelial growth factor (VEGF) and enhanced microvessel density (MVD) in tissues enable subterranean rodents to adapt to hypoxic sealed burrows. However, the expression of VEGF is inhibited by decreases in oxygen content, which is different from what obtains in Sprague Dawley (SD)rats. Thromspondin-1(TSP-1) is the first endogenous angiogenesis inhibitor identified inp53 pathway. It has several domains that bind to different proteins which regulate cell-to-cell interactions, inhibit endothelial cell proliferation and induce endothelial cell apoptosis (anti-angiogenesis). In this study, we analyzed the coding region and the expression pattern of TSP-1 gene in plateau zokor under different oxygen partial pressures using bioinformatics and qRT-PCR, respectively. Our results showed that the base and amino acid homologies between plateau zokor and Northern Israeli blind subterranean mole rat (Nannospalaxgalili) were 95.08 and 97.61%, respectively. There were eight parallel evolution sites with Nannospalaxgalili. Evaluation by ‘Sorting Tolerant From Intolerant' (SIFT) algorithm showed four sites with significant effects on the function of TSP-1. Three-dimensional (3D) structures revealed that Asp185 and Thr270 were located in the NH2 terminal domain, with Glu536 in the Type I repeat domain, and Thr1092 in the COOH terminal domain. Compared to SD rats, the polarities of these four mutation sites changed. The expression levels of TSP-1 in plateau zokor tissues increased significantly from 2 260 m(16.12kPa) to 3 300 m(14.13kPa), but there was no significant difference in TSP-1 expression in SD rats. In conclusion, due to long-term adaption to the hypoxic environment of sealed burrows, plateau zokor upregulates the expression of TSP-1 to effect anti-angiogenesis. Moreover, mutations in gene structure of TSP-1 may play an important role in inhibiting angiogenesis.
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An Z, Gao J, Wang J. A New Heterometallic Pb(II)–Ca(II) Coordination Polymer with 2D Pb–O–Ca Inorganic Connectivity. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328418120011] [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: 11/22/2022]
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Xun-Ping W, An Z. [Study of spatial stratified sampling strategy of Oncomelania hupensis snail survey based on plant abundance]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2017; 29:420-425. [PMID: 29508572 DOI: 10.16250/j.32.1374.2017036] [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] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Objective To optimize and simplify the survey method of Oncomelania hupensis snails in marshland endemic regions of schistosomiasis, so as to improve the precision, efficiency and economy of the snail survey. Methods A snail sampling strategy (Spatial Sampling Scenario of Oncomelania based on Plant Abundance, SOPA) which took the plant abundance as auxiliary variable was explored and an experimental study in a 50 m×50 m plot in a marshland in the Poyang Lake region was performed. Firstly, the push broom surveyed data was stratified into 5 layers by the plant abundance data; then, the required numbers of optimal sampling points of each layer through Hammond McCullagh equation were calculated; thirdly, every sample point in the line with the Multiple Directional Interpolation (MDI) placement scheme was pinpointed; and finally, the comparison study among the outcomes of the spatial random sampling strategy, the traditional systematic sampling method, the spatial stratified sampling method, Sandwich spatial sampling and inference and SOPA was performed. Results The method (SOPA) proposed in this study had the minimal absolute error of 0.213 8; and the traditional systematic sampling method had the largest estimate, and the absolute error was 0.924 4. Conclusion The snail sampling strategy (SOPA) proposed in this study obtains the higher estimation accuracy than the other four methods.
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Affiliation(s)
- W Xun-Ping
- School of Geography and Environmental Sciences, Jiangxi Normal University, Jiangxi Province, Nanchang 330022, China
| | - Z An
- School of Geography and Environmental Sciences, Jiangxi Normal University, Jiangxi Province, Nanchang 330022, China; Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, China
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Zhao J, An Z, Zhu J, Tan W, Liu M. Measurements of Lα, Lβ, Lγ and M X-ray production cross sections of Os, Ir and Pt by low-energy electron impact: Comparisons of experiment with theory. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2017.01.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yang WP, Wu HY, Zhang W, Chen GS, Chen WJ, Li H, Song JM, An HB, Xu JL, Zhao WY, Wang YZ, Cui LY, An Z, Tao J, He LJ. [Consensus on pathologic diagnosis of Wilms' tumor in children]. Zhonghua Bing Li Xue Za Zhi 2017; 46:149-154. [PMID: 28297753 DOI: 10.3760/cma.j.issn.0529-5807.2017.03.002] [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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Li C, Hardisty DS, Luo G, Huang J, Algeo TJ, Cheng M, Shi W, An Z, Tong J, Xie S, Jiao N, Lyons TW. Uncovering the spatial heterogeneity of Ediacaran carbon cycling. Geobiology 2017; 15:211-224. [PMID: 27997754 DOI: 10.1111/gbi.12222] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 12/02/2016] [Indexed: 05/15/2023]
Abstract
Records of the Ediacaran carbon cycle (635-541 million years ago) include the Shuram excursion (SE), the largest negative carbonate carbon isotope excursion in Earth history (down to -12‰). The nature of this excursion remains enigmatic given the difficulties of interpreting a perceived extreme global decrease in the δ13 C of seawater dissolved inorganic carbon. Here, we present carbonate and organic carbon isotope (δ13 Ccarb and δ13 Corg ) records from the Ediacaran Doushantuo Formation along a proximal-to-distal transect across the Yangtze Platform of South China as a test of the spatial variation of the SE. Contrary to expectations, our results show that the magnitude and morphology of this excursion and its relationship with coexisting δ13 Corg are highly heterogeneous across the platform. Integrated geochemical, mineralogical, petrographic, and stratigraphic evidence indicates that the SE is a primary marine signature. Data compilations demonstrate that the SE was also accompanied globally by parallel negative shifts of δ34 S of carbonate-associated sulfate (CAS) and increased 87 Sr/86 Sr ratio and coastal CAS concentration, suggesting elevated continental weathering and coastal marine sulfate concentration during the SE. In light of these observations, we propose a heterogeneous oxidation model to explain the high spatial heterogeneity of the SE and coexisting δ13 Corg records of the Doushantuo, with likely relevance to the SE in other regions. In this model, we infer continued marine redox stratification through the SE but with increased availability of oxidants (e.g., O2 and sulfate) limited to marginal near-surface marine environments. Oxidation of limited spatiotemporal extent provides a mechanism to drive heterogeneous oxidation of subsurface reduced carbon mostly in shelf areas. Regardless of the mechanism driving the SE, future models must consider the evidence for spatial heterogeneity in δ13 C presented in this study.
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Affiliation(s)
- C Li
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - D S Hardisty
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
- Department of Earth Sciences, University of California, Riverside, CA, USA
| | - G Luo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - J Huang
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China
| | - T J Algeo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China
- Department of Geology, University of Cincinnati, Cincinnati, OH, USA
| | - M Cheng
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - W Shi
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - Z An
- Faculty of Earth Sciences, China University of Geosciences, Wuhan, China
| | - J Tong
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - S Xie
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - N Jiao
- State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen, China
| | - T W Lyons
- Department of Earth Sciences, University of California, Riverside, CA, USA
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Sun L, An Z, Li CH, Liu R, Zhao JX, Liu XY. [Role of galectin-1 in regulation of umbilical cord mesenchymal stem cells on T cells of rheumatoid arthritis]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:964-969. [PMID: 27987498] [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: 06/06/2023]
Abstract
OBJECTIVE The therapeutic potential of umbilical cord mesenchymal stem cells (UC-MSCs) in rheumatoid arthritis (RA) has attracted more and more attention, because of it can suppress the various inflammatory effects of T cells. Galectin-1 is highly expressed in UC-MSCs, as the first lectin mediating the immunomodulatory effect of MSCs. Our study will investigate the effects of galectin-1 in regulation of UC-MSCs on rheumatoid arthritis T cells. METHODS Lentivirus transfected shRNA technique was used to knock down the expression of galectin-1 in UC-MSCs to construct UC-MSCs(Gal-1-). The effects of UC-MSCs and UC-MSCs(Gal-1-) on CD4+ T cells in RA patients were investigated by contact system, including negative control group (CD4+ T cells), positive control group [CD4+ T-phytohemagg lutinin (PHA)], UC-MSCs-CD4+ T cells co-culture group, UC-MSCs(control shRNA)-CD4+ T cells co-culture group, and UC-MSCs(Gal-1-)-CD4+ T cells co-culture group. The proliferation of CD4+ T cells was detected by MTS assay. The level of tumor necrosis factors α (TNF-α) in cells supernatant was detected by enzyme linked immunosorbent assay (ELISA). The effect of UC-MSCs on helper T cell (Th) subset was detected by flow cytometry. RESULTS In vitro, UC-MSCs were capable of inhibiting PHA induced proliferation of CD4+ T cells from RA patients, but UC-MSCs(Gal-1-) did not show the significant inhibitory effect. Galectin-1 affect the TNF-α level of CD4+ T cells regulated by UC-MSCs. UC-MSCs and UC-MSCs(control shRNA) significantly inhibited the expression of TNF-α in PHA-induced CD4+ T cells. However, UC-MSCs(Gal-1-) had no significant inhibitory effect. Furthermore, the Th1 cells were also significantly suppressed by UC-MSCs and UC-MSCs(control shRNA) (4.83%±1.37% and 5.13%±0.87%,P=0.012 and P=0.018). These was no significant difference in the proportion of the Th1 cells between the control group and UC-MSCs(Gal-1-) group (8.51%±2.04% and 6.41%±0.96%,P=0.101). The Th2 cells were protected after silence galectin-1 in UC-MSCs, whereas there was no significant difference. The proportion of Th17 was decreased by co-culture with UC-MSCs and UC-MSCs (control shRNA), but these was also no significant difference. CONCLUSION UC-MSCs can inhibit the proliferation and differentiation of CD4+ T cells from RA patients, but these effect declined after knocking down the expression of galectin-1. Galectin-1 maybe take part in the regulation of UC-MSCs on rheumatoid arthritis CD4+ T cells.
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Affiliation(s)
- L Sun
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - Z An
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - C H Li
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - R Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - J X Zhao
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - X Y Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
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Lü Q, Zhang Y, Song C, An Z, Wei S, Huang J, Huang L, Tang L, Tong N. A novel SLC12A3 gene homozygous mutation of Gitelman syndrome in an Asian pedigree and literature review. J Endocrinol Invest 2016; 39:333-40. [PMID: 26260218 DOI: 10.1007/s40618-015-0371-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 07/24/2015] [Indexed: 02/06/2023]
Abstract
OBJECTIVES Gitelman syndrome (GS) is an autosomal recessive disease characterized by hypokalemic metabolic alkalosis in combination with significant hypomagnesemia and hypocalciuria which is caused by mutations in the SLC12A3 gene. In this study, we reported a case of GS pedigree and reviewed pertinent literature so as to explore the relationship between clinical characteristics and genotype meanwhile provide recommendations for the diagnosis and treatment of GS. DESIGN AND METHODS This is a pedigree-based genetic study of GS and 11 members from one family were included. We summarized their clinical features, analyzed laboratory parameters related to GS and SLC12A3 gene. RESULTS The proband experienced intermittent severe symptoms of weakness accompanied by significant hypokalemia, hypomagnesemia and hypocalciuria in laboratory test with poor treatments. His mother had more slight symptoms of weakness than him with mild hypokalemia and hypocalciuria. Mild hypomagnesemia was also observed in his sister with occasional weakness. All other pedigree members had normal laboratory test with no GS-related symptoms. A homozygous mutation of SLC12A3 gene (c.488C > T) was detected by genetic testing in three members, and six were carriers of this mutation. CONCLUSIONS Genotype and phenotype vary significantly among GS patients. Male patients tend to experience more severe symptoms and poor treatment effect. Further large-scale population, animal, and molecular biology experiments are required to investigate the complexity of GS and to find a better treatment regimen for this disease.
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Affiliation(s)
- Q Lü
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - Y Zhang
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - C Song
- West China School of Medicine, Sichuan University, No.17, the 3rd section of the south of Renmin road, Chengdu, 610041, China
| | - Z An
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - S Wei
- West China School of Medicine, Sichuan University, No.17, the 3rd section of the south of Renmin road, Chengdu, 610041, China
| | - J Huang
- West China School of Medicine, Sichuan University, No.17, the 3rd section of the south of Renmin road, Chengdu, 610041, China
| | - L Huang
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - L Tang
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - N Tong
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China.
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Zhao J, Tian L, Li X, An Z, Zhu J, Liu M. Measurements of L shell X-ray yields of thick Ag target by 6–29keV electron impact. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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An Z, Tang Z, Ma B, Mason AS, Guo Y, Yin J, Gao C, Wei L, Li J, Fu D. Transposon variation by order during allopolyploidisation between Brassica oleracea and Brassica rapa. Plant Biol (Stuttg) 2014; 16:825-35. [PMID: 24176077 DOI: 10.1111/plb.12121] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 09/23/2013] [Indexed: 05/02/2023]
Abstract
Although many studies have shown that transposable element (TE) activation is induced by hybridisation and polyploidisation in plants, much less is known on how different types of TE respond to hybridisation, and the impact of TE-associated sequences on gene function. We investigated the frequency and regularity of putative transposon activation for different types of TE, and determined the impact of TE-associated sequence variation on the genome during allopolyploidisation. We designed different types of TE primers and adopted the Inter-Retrotransposon Amplified Polymorphism (IRAP) method to detect variation in TE-associated sequences during the process of allopolyploidisation between Brassica rapa (AA) and Brassica oleracea (CC), and in successive generations of self-pollinated progeny. In addition, fragments with TE insertions were used to perform Blast2GO analysis to characterise the putative functions of the fragments with TE insertions. Ninety-two primers amplifying 548 loci were used to detect variation in sequences associated with four different orders of TE sequences. TEs could be classed in ascending frequency into LTR-REs, TIRs, LINEs, SINEs and unknown TEs. The frequency of novel variation (putative activation) detected for the four orders of TEs was highest from the F1 to F2 generations, and lowest from the F2 to F3 generations. Functional annotation of sequences with TE insertions showed that genes with TE insertions were mainly involved in metabolic processes and binding, and preferentially functioned in organelles. TE variation in our study severely disturbed the genetic compositions of the different generations, resulting in inconsistencies in genetic clustering. Different types of TE showed different patterns of variation during the process of allopolyploidisation.
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Affiliation(s)
- Z An
- Engineering Research Center of South Upland Agriculture of Ministry of Education, College of Agronomy and Biotechnology, Southwest University, Chongqing, China; Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, China
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Dhupkar P, Zhao H, Mukherjee S, Mujoo K, Zhang N, An Z. Abstract P5-11-09: Crk II adaptor proteins as positive regulators of HER3 signaling in breast cancer. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p5-11-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
HER3 (ErbB3), which is a member of the human epidermal growth factor receptor (EGFR) family has emerged as a key oncogene in cancer progression. HER3 overexpression has been observed in lung, prostate, melanomas and colon cancers and is associated with poor patient prognosis. HER3 has been known to play a role in resistance mechanisms towards EGFR tyrosine kinase inhibitors like Gefitinib and anti-HER2 antibodies like Trastuzumab in lung and breast cancers respectively. Upon ligand (neuregulin) binding, HER3 heterodimerizes with its partner receptors, inducing phosphorylation of its tyrosine residues in the c-terminal tail, which mediate HER3-dependent signaling. By binding to the HER3 c-terminal tail, Src homology 2 domain (SH2) or phosphotyrosine-binding (PTB) proteins may regulate the neuregulin-induced signaling. Here, we used a SH2 profiling approach to discover novel SH2 adaptor proteins interacting with HER3 and found that the SH2 adaptor protein Crk II (C10 regulator of kinase II) interacts strongly with phosphotyrosines in CHO cells overexpressing HER3 with or without neuregulin stimulation. Crk II and HER3 are critical in proliferation, migration and invasion of breast cancer cells. In this study, we investigate the protein-protein interaction of Crk II and HER3 in breast cancer. Our preliminary protein-protein interaction data confirmed that Crk II interacts with HER3 in MCF-7, MDA-MB-453 and MDA-MB-468 breast cancer cells. We hypothesize that Crk II affects HER3-induced signaling, thus affecting growth and migration in breast cancer cells.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-11-09.
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Affiliation(s)
- P Dhupkar
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - H Zhao
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - S Mukherjee
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - K Mujoo
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - N Zhang
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - Z An
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
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Mukherjee S, Huang Z, Fa M, Dhupkar P, Mujoo K, Zhang N, An Z. Abstract P5-11-03: Deciphering the role of HER3-DJ-1 interaction in breast cancer. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p5-11-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Advanced breast cancer is notorious for its aggressive nature and poor prognosis. An ablated regulation in the EGFR family receptor signaling has been linked to the development of numerous tumor types, including breast cancer. HER3 is a unique member of the EGFR family that lacks intrinsic tyrosine kinase activity. However, HER3 can initiate signaling when dimerized with other family members such as HER2. HER3 overexpression is correlated with poor survival in breast cancer patients. HER3 also plays an important role in drug resistance mechanism such as in trastuzumab resistant breast cancer cell lines where it dimerize with EGFR to initiate signaling via the PI3K/Akt pathway. The identification of interaction partners of HER3's C-tail is critical to understand the signaling mechanism underpinning HER3's role in drug resistance and in progression of breast cancer. Our laboratory has identified a panel of novel HER3-interacting proteins by a combined immunoprecipitation and mass-spectrometry approach. One of the novel HER3 interacting proteins is DJ-1 which is a chaperone protein that plays an important role in the development of many cancers, including breast cancer. DJ-1 knockdown in high HER3 expressing breast cancer cell lines such as MCF-7 and MDA- MB-453 resulted in the reduction in HER3 levels as well as proteins downstream of the HER3 signaling pathway such as MAPK. We have also demonstrated that DJ-1 knockdown led to decrease in cancer cell proliferation. Studies are now in progress to determine the mechanism of regulation of HER3 by DJ-1 and the impact of DJ-1 KD in in vivo breast cancer xenograft models. These studies will help us to decipher key molecules which regulate HER3 mediated signaling and their role in breast cancer development and progression.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-11-03.
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Affiliation(s)
- S Mukherjee
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - Z Huang
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - M Fa
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - P Dhupkar
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - K Mujoo
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - N Zhang
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - Z An
- UT Houston M.D Anderson Cancer Center, Houston, TX
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Lin Y, Zhou J, Sha L, Li Y, Qu X, Liu L, Chen H, An Z, Wang Y, Sun C. Metabolite differences in the lenticular nucleus in type 2 diabetes mellitus shown by proton MR spectroscopy. AJNR Am J Neuroradiol 2013; 34:1692-6. [PMID: 23598834 DOI: 10.3174/ajnr.a3492] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 01/18/2023]
Abstract
BACKGROUND AND PURPOSE Previous studies by using proton MR spectroscopy found metabolite abnormalities in the cerebral cortex and white matter of patients with type 2 diabetes mellitus. The present study was undertaken to detect metabolite differences in the lenticular nuclei and thalamus in patients with T2DM. MATERIALS AND METHODS Twenty subjects with T2DM and 22 age-matched control subjects underwent single-voxel MR spectroscopy in the left and right lenticular nuclei and left and right thalami. NAA/Cr and Cho/Cr ratios were calculated. Brain lactic acid, fasting blood glucose, and glycosylated hemoglobin levels were also monitored. RESULTS The NAA/Cr ratio was lower in the left lenticular nuclei of subjects with T2DM (P = .007), whereas the Cho/Cr ratio was increased in both the and right lenticular nuclei (P = .001). The NAA/Cr ratio was negatively correlated with FBG in the left (r = -0.573, P = .008) and right nuclei (r = -0.564, P = .010). It was also negatively correlated to HbA1c in the left (r = -0.560, P = .010) and right (r = -0.453, P = .045) nuclei. The Cho/Cr ratio was positively correlated with these variables (P < .05). No significant differences in NAA/Cr or Cho/Cr ratios were observed in the thalamus of patients with T2DM. Lactic acid was not detected in any of the patients in the study. CONCLUSIONS The different metabolic statuses of the lenticular nuclei and thalamus suggest different effects of T2DM in each of these brain nuclei, with the lenticular nuclei being more vulnerable than the thalamus. The abnormal metabolic status was observed before lesions had appeared in these brain areas.
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Cai B, Zhang J, Zhang M, Li L, Feng W, An Z, Wang L. Micro-inflammation Characterized by Disturbed Treg/Teff Balance with Increasing sIL-2R in Patients with Type 2 Diabetes. Exp Clin Endocrinol Diabetes 2013; 121:214-9. [PMID: 23595796 DOI: 10.1055/s-0033-1333687] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- B. Cai
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - J. Zhang
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - M. Zhang
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - L. Li
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - W. Feng
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - Z. An
- Department of Endocrinology, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - L. Wang
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
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Abstract
The spin current, orbit angular momentum current and total angular momentum current in a tensor form have been universally defined according to the quantum electrodynamics. Their conservation quantities and the continuity equations have been discussed in different cases. Non-relativistic approximation forms are deduced in order to explain their physical meanings, and to analyze some experimental results. The spin current of helical edge states in HgTe/CdTe quantum wells is calculated to demonstrate the properties of the spin current of the two dimensional quantum spin-Hall system. A generalized spin-orbit coupling term in the semiconducting media is deduced based on the theory of the electrodynamics in the moving media. It is recommended to use the effective total angular momentum current instead of the pure spin current to describe the distribution of polarization and the transport properties in spintronics.
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Affiliation(s)
- Z An
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University , Wuhan 430072, China
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Park W, An Z, Liu X, Song H, Kim W, Yu J. EP-1569 EFFECT OF LOW DOSE TROGLITAZONE ON RADIATION SENSITIVITY IN CERVIX CANCER CELLS. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71902-3] [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: 11/17/2022]
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An Z, Zhang W. Role of inflammatory factor s in the pathology of acute myocardial infarction. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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An Z, Zhang W. Analysis of left ventricular remodelling in patients treated with cardiac resynchronisation therapy. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Di B, Meng Y, Wang YD, Liu XJ, An Z. Electroluminescence Enhancement in Polymer Light-Emitting Diodes through Inelastic Scattering of Oppositely Charged Bipolarons. J Phys Chem B 2011; 115:9339-44. [DOI: 10.1021/jp2006342] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- B. Di
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. Meng
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. D. Wang
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - X. J. Liu
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Z. An
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
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Affiliation(s)
- B. Di
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. Meng
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. D. Wang
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - X. J. Liu
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Z. An
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
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Gudas JM, Torgov M, An Z, Jia XC, Morrison KJ, Morrison RK, Vincent M, Yang P, Kanner SB, Jakobovits A. Use of AGS-16M8F as a novel antibody drug conjugate (ADC) for treating renal cancers. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e15014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Dev SB, Nanda GS, An Z, Wang X, Hoffman RM, Hofmann GA. Effective Electroporation Therapy of Human Pancreatic Tumors Implanted in Nude Mice. Drug Deliv 2008; 4:293-9. [DOI: 10.3109/10717549709052016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Jakobovits A, Gudas J, An Z, Ganguly N, Morrison KR, Morrison KJ, Raitano AB, Satpaev D, Jia X, Kanner SB. AGS-16M18: A novel therapeutic human monoclonal antibody for the treatment of kidney and liver cancers. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.3050] [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: 11/20/2022] Open
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Abstract
Within an extended Su-Schrieffer-Heeger model including interchain interactions and the extended Hubbard model, the dynamical relaxation of photoexcitations in two coupled conjugated polymer chains is investigated by using a nonadiabatic evolution method. Initially, one of the two chains is photoexcited and the other chain is in the dimerized ground state. Due to the interchain interactions, the electron and/or the hole can be transferred from one chain to the other chain. For weak interchain coupling, the dynamical evolution of the lattice on the photoexcited chain is similar to that found in an isolate single chain case. With interchain interactions increasing, the amplitude of the distortions on the photoexcited chain decreases, and simultaneously, that on the other chain gradually increases. Until stronger interchain coupling, the deformations of the two chains have almost the same amplitude. Besides intrachain polaron-excitons and intrachain oppositely charged polaron pairs as found in single chain case, interchain polaron-excitons and interchain separated charged polaron pairs are obtained. The results show that the yield of interchain products increases and that of intrachain products decreases with interchain coupling increasing. Totally, the yield of charged polarons (including intrachain oppositely charged polaron pairs and interchain oppositely charged polaron pairs) is about 25%, in good agreement with results from experiments.
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Affiliation(s)
- Y Meng
- College of Physics, Hebei Normal University, Shijiazhuang, China
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Ireland C, Peekhaus N, Lu P, Sangari R, Zhang A, Masurekar P, An Z. The tryptophan synthetase gene TRP1 of Nodulisporium sp.: molecular characterization and its relation to nodulisporic acid A production. Appl Microbiol Biotechnol 2008; 79:451-9. [PMID: 18389234 DOI: 10.1007/s00253-008-1440-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Revised: 02/26/2008] [Accepted: 02/29/2008] [Indexed: 10/22/2022]
Abstract
Nodulisporic acid A (NAA), an insecticidal indole diterpene, is produced by the fungus Nodulisporium sp. Since indole-3-glycerolphosphate is the precursor of the indole moiety of NAA, it is suggested that the activity of tryptophan synthetase may play a role in NAA biosynthesis. To investigate this hypothesis, the tryptophan synthetase gene TRP1 of Nodulisporium sp. was cloned and characterized. The gene consists of three introns of 146, 68, and 57 bp. The four exons encode a protein of 712 amino acids, the sequence of which is highly homologous to that of other fungal tryptophan synthetase proteins. The transcription initiation site was mapped 66 bp upstream to the ATG, and the polyA tail attachment site is 169 bp downstream to the translation stop codon. Replacement of the N-terminal half of the gene with a hygromycin selection marker yielded mutants with the tryptophan auxotroph/hygromycin-resistance (trp(-)/hyr) phenotype. The TRP1 mutants required a high concentration of tryptophan supplement in solid medium (10 mM) to sustain minimal growth and failed to produce NAA in the production medium (FFL-CAM) supplemented with high concentrations of tryptophan.
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Affiliation(s)
- C Ireland
- Merck Research Laboratories, PO Box 2000, RY80Y-325, Rahway, NJ 07065, USA
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