22 results on '"Peng, Feng"'
Search Results
2. Establishment of orthotopic osteosarcoma animal models in immunocompetent rats through muti-rounds of in-vivo selection
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Yao, Mengyu, Lei, Zehua, Peng, Feng, Wang, Donghui, Li, Mei, Zhong, Guoqing, Shao, Hongwei, Zhou, Jielong, Du, Chang, and Zhang, Yu
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- 2024
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3. Prognostic value of long-term antidiabetic and antihypertensive therapy in postoperative gastric cancer patients: the FIESTA study
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Wang, Laicheng, Hu, Dan, Fan, Zongcheng, Yu, Jianjian, Zhang, Shunpeng, Lin, Yunchai, Chen, Xin, Lin, Xiandong, Yan, Xiyao, Lin, Jinxiu, and Peng, Feng
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- 2022
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4. Low shifts in salinity determined assembly processes and network stability of microeukaryotic plankton communities in a subtropical urban reservoir
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Mo, Yuanyuan, Peng, Feng, Gao, Xiaofei, Xiao, Peng, Logares, Ramiro, Jeppesen, Erik, Ren, Kexin, Xue, Yuanyuan, and Yang, Jun
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- 2021
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5. Genome-wide characterization, expression analyses, and functional prediction of the NPF family in Brassica napus
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Wen, Jing, Li, Peng-Feng, Ran, Feng, Guo, Peng-Cheng, Zhu, Jia-Tian, Yang, Jin, Zhang, Lan-Lan, Chen, Ping, Li, Jia-Na, and Du, Hai
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- 2020
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6. Upregulation of METTL14 mediates the elevation of PERP mRNA N6 adenosine methylation promoting the growth and metastasis of pancreatic cancer
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Wang, Min, Liu, Jun, Zhao, Yan, He, Ruizhi, Xu, Xiaodong, Guo, Xingjun, Li, Xu, Xu, Simiao, Miao, Ji, Guo, Jianpin, Zhang, Hang, Gong, Jun, Zhu, Feng, Tian, Rui, Shi, Chengjian, Peng, Feng, Feng, Yechen, Yu, Shuo, Xie, Yu, Jiang, Jianxin, Li, Min, Wei, Wenyi, He, Chuan, and Qin, Renyi
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- 2020
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7. Genome-wide survey of the bHLH super gene family in Brassica napus
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Ke, Yun-Zhuo, Wu, Yun-Wen, Zhou, Hong-Jun, Chen, Ping, Wang, Mang-Mang, Liu, Ming-Ming, Li, Peng-Feng, Yang, Jin, Li, Jia-Na, and Du, Hai
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- 2020
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8. Is HBV viral load at admission associated with development of acute-on-chronic liver failure in patients with acute decompensation of chronic hepatitis B related cirrhosis?
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Lei, Jian-Hua, Peng, Feng, Chen, Zi, and Xiao, Xin-Qiang
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- 2019
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9. Advantages and robustness of partial VMAT with prone position for neoadjuvant rectal cancer evaluated by CBCT-based offline adaptive radiotherapy.
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Zhang, Zhe, Yu, Shou, Peng, Feng, Tan, Zhibo, Zhang, Lei, Li, Daming, Yang, Pengfei, Peng, Zhaoming, Li, Xin, Fang, Chunfeng, Wang, Yuenan, and Liu, Yajie
- Subjects
PATIENT positioning ,RECTAL cancer ,VOLUMETRIC-modulated arc therapy ,CONE beam computed tomography ,PHYSIOLOGICAL effects of radiation - Abstract
Background and purpose: This study aims to explore the advantages and robustness of the partial arc combined with prone position planning technique for radiotherapy in rectal cancer patients. Adaptive radiotherapy is recalculated and accumulated on the synthesis CT (sCT) obtained by deformable image registration between planning CT and cone beam CT (CBCT). Full and partial volume modulation arc therapy (VMAT) with the prone position on gastrointestinal and urogenital toxicity, based on the probability of normal tissue complications (NTCP) model in rectal cancer patients were evaluated. Materials and methods: Thirty-one patients were studied retrospectively. The contours of different structures were outlined in 155 CBCT images. First, full VMAT (F-VMAT) and partial VMAT (P-VMAT) planning techniques were designed and calculated using the same optimization constraints for each individual patient. The Acuros XB (AXB) algorithm was used in order to generate more realistic dose distributions and DVH, considering the air cavities. Second, the Velocity 4.0 software was used to fuse the planning CT and CBCT to obtain the sCT. Then, the AXB algorithm was used in the Eclipse 15.6 software to conduct re-calculation based on the sCT to obtain the corresponding dose. Furthermore, the NTCP model was used to analyze its radiobiological side effects on the bladder and the bowel bag. Results: With a CTV coverage of 98%, when compared with F-VMAT, P-VMAT with the prone position technique can effectively reduce the mean dose of the bladder and the bowel bag. The NTCP model showed that the P-VMAT combined with the prone planning technique resulted in a significantly lower complication probability of the bladder (1.88 ± 2.08 vs 1.62 ± 1.41, P = 0.041) and the bowel bag (1.28 ± 1.70 vs 0.95 ± 1.52, P < 0.001) than the F-VMAT. In terms of robustness, P-VMAT was more robust than F-VMAT, considering that less dose and NTCP variation was observed in the CTV, bladder and bowel bag. Conclusion: This study analyzed the advantages and robustness of the P-VMAT in the prone position from three aspects, based on the sCT fused by CBCT. Whether it is in regards to dosimetry, radiobiological effects or robustness, P-VMAT in the prone position has shown comparative advantages. [ABSTRACT FROM AUTHOR]
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- 2023
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10. Prediction of three lipid derivatives for postoperative gastric cancer mortality: the Fujian prospective investigation of cancer (FIESTA) study
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Hu, Dan, Peng, Feng, Lin, Xiandong, Chen, Gang, Liang, Binying, Chen, Ying, Li, Chao, Zhang, Hejun, Fan, Guohui, Xu, Guodong, Xia, Yan, Lin, Jinxiu, Zheng, Xiongwei, and Niu, Wenquan
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- 2018
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11. Integrin β1 regulates the invasion and radioresistance of laryngeal cancer cells by targeting CD147
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Li, Li, Dong, Xiaoxia, Peng, Feng, and Shen, Li
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- 2018
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12. Genome-wide characterization, expression analyses, and functional prediction of the NPF family in Brassica napus
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Jia-Tian Zhu, Hai Du, Lan-Lan Zhang, Ping Chen, Peng-Feng Li, Pengcheng Guo, Jiana Li, Feng Ran, Jin Yang, and Jing Wen
- Subjects
0106 biological sciences ,Subfamily ,lcsh:QH426-470 ,lcsh:Biotechnology ,Genes, Plant ,01 natural sciences ,Genome ,Expression analysis ,03 medical and health sciences ,Phylogenetics ,Gene Expression Regulation, Plant ,lcsh:TP248.13-248.65 ,Arabidopsis ,Gene duplication ,Genetics ,Gene ,Phylogeny ,030304 developmental biology ,Synteny ,Plant Proteins ,0303 health sciences ,Glucosinolate transporter ,biology ,Brassica napus ,food and beverages ,biology.organism_classification ,Hormone ,lcsh:Genetics ,Multigene Family ,DNA microarray ,Genome, Plant ,010606 plant biology & botany ,Biotechnology ,Research Article ,NPF - Abstract
Background NITRATE TRANSPORTER 1/PEPTIDE TRANSPORTER (NRT1/PTR) family (NPF) members are essential transporters for many substrates in plants, including nitrate, hormones, peptides, and secondary metabolites. Here, we report the global characterization of NPF in the important oil crop Brassica napus, including that for phylogeny, gene/protein structures, duplications, and expression patterns. Results A total of 199 B. napus (BnaNPFs) NPF-coding genes were identified. Phylogenetic analyses categorized these genes into 11 subfamilies, including three new ones. Sequence feature analysis revealed that members of each subfamily contain conserved gene and protein structures. Many hormone−/abiotic stress-responsive cis-acting elements and transcription factor binding sites were identified in BnaNPF promoter regions. Chromosome distribution analysis indicated that BnaNPFs within a subfamily tend to cluster on one chromosome. Syntenic relationship analysis showed that allotetraploid creation by its ancestors (Brassica rapa and Brassica oleracea) (57.89%) and small-scale duplication events (39.85%) contributed to rapid BnaNPF expansion in B. napus. A genome-wide spatiotemporal expression survey showed that NPF genes of each Arabidopsis and B. napus subfamily have preferential expression patterns across developmental stages, most of them are expressed in a few organs. RNA-seq analysis showed that many BnaNPFs (32.66%) have wide exogenous hormone-inductive profiles, suggesting important hormone-mediated patterns in diverse bioprocesses. Homologs in a clade or branch within a given subfamily have conserved organ/spatiotemporal and hormone-inductive profiles, indicating functional conservation during evolution. qRT-PCR-based comparative expression analysis of the 12 BnaNPFs in the NPF2–1 subfamily between high- and low-glucosinolate (GLS) content B. napus varieties revealed that homologs of AtNPF2.9 (BnaNPF2.12, BnaNPF2.13, and BnaNPF2.14), AtNPF2.10 (BnaNPF2.19 and BnaNPF2.20), and AtNPF2.11 (BnaNPF2.26 and BnaNPF2.28) might be involved in GLS transport. qRT-PCR further confirmed the hormone-responsive expression profiles of these putative GLS transporter genes. Conclusion We identified 199 B. napus BnaNPFs; these were divided into 11 subfamilies. Allopolyploidy and small-scale duplication events contributed to the immense expansion of BnaNPFs in B. napus. The BnaNPFs had preferential expression patterns in different tissues/organs and wide hormone-induced expression profiles. Four BnaNPFs in the NPF2–1 subfamily may be involved in GLS transport. Our results provide an abundant gene resource for further functional analysis of BnaNPFs.
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- 2020
13. A preliminary investigation on single nucleotide polymorphism rs2287622 of bile salt export pump gene in patients with chronic hepatitis C virus infection in Hunan, China.
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Jian-Hua Lei, Xu Yang, Xin-Qiang Xiao, Zi Chen, Feng Peng, Lei, Jian-Hua, Yang, Xu, Xiao, Xin-Qiang, Chen, Zi, and Peng, Feng
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CHRONIC hepatitis C ,SINGLE nucleotide polymorphisms ,BILE salts ,INFECTION ,POLYMERASE chain reaction ,CIRRHOSIS of the liver ,ASIANS ,CARRIER proteins ,DISEASE susceptibility ,GENES ,GENETIC polymorphisms ,HERBAL medicine ,CHINESE medicine ,VIRAL load ,CASE-control method ,CHRONIC hepatitis B ,SEQUENCE analysis ,ODDS ratio ,GENOTYPES - Abstract
Background: European researchers have underscored associations between single nucleotide polymorphism (SNP) rs2287622 of the hepatobiliary bile salt export pump (BSEP) gene and the risk of hepatitis C virus (HCV) infection. The distributions of SNP rs2287622 are racially specific. This study was aimed to preliminarily investigate the distribution of BSEP gene SNP rs2287622 in the Han patients with chronic HCV-infection (CHC) in Hunan, China.Methods: BSEP gene SNP rs2287622 of 165 CHC patients, 99 patients with chronic hepatitis B virus infection (CHB) and 99 healthy individuals were analyzed by polymerase chain reaction-restriction fragment length polymorphism analysis and nucleotide sequencing.Results: The overall frequencies of the C allele of BESP gene SNP rs2287622 in the CHC patients, CHB patients and healthy individuals were 74.2, 72.7 and 74.2%, respectively (P > 0.05). The overall odds ratios (ORs) aiming at predicting CHC risk by comparing the ratios of the frequency distribution of alleles or genotypes in the CHC group with those in the non-CHC group had no statistical significance (P > 0.05). However, the CHC ORs of CC vs TT, TC vs TT and CC + CT vs TT among the individuals aged over 40 years were 2.680, 3.122 and 2.824 respectively (P < 0.05), and the higher risk did not relate to gender, HCV genotypes and presence of HCV-related liver cirrhosis.Conclusions: Among the Han individuals aged over 40 years in Hunan, China, genotype CC or CT of BSEP gene SNP rs2287622 may correlate with higher risk of CHC in comparison with genotype TT. Further study with a larger cohort is essential. [ABSTRACT FROM AUTHOR]- Published
- 2017
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14. RNA interference against Biot2, a novel mouse testis — specific gene, inhibits the growth of tumor cells.
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Wang, Chun-Ting, Zhang, Peng, Wang, Yong-Sheng, Ruan, Xu-Zhi, Li, Zhi-Yong, Peng, Feng, Yang, Han-Shuo, and Wei, Yu-Quan
- Abstract
Biot2 is a novel murine testis-specific gene that was first identified using the SEREX technique, and named by our laboratory. Using conventional RT-PCR and real time RT-PCR, we tested the expression profile of Biot2 in normal tissues and various murine tumor cell lines. Using RNA interference, we studied the biological function of Biot2 in tumorigenesis. We applied various types of growth assay, such as the in vitro MTT, colony-forming and BrdU incorporation assays, along with in vivo tumorigenicity assays, to reveal its inhibition of tumor cell proliferation. The results revealed that the Biot2 transcript was detected only and strongly in the testis tissues and abundantly in five types of murine cancer cell line. Treating B16 murine melanoma, LL/2 murine Lewis lung carcinoma and CT26 murine colorectal adenocarcinoma with special shRNA targeting Biot2 can significantly reduce the proliferation rate of these three tumor cell lines in vitro, as measured by the MTT, colony-forming and BrdU incorporation assays. The tumorigenicity of the CT26 cells transfected with special shRNA targeting Biot2 was also decreased distinctly in vivo compared with the control. It was therefore concluded that Biot2 plays a key role in tumorigenesis and could be a potential target for biotherapy. [ABSTRACT FROM AUTHOR]
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- 2009
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15. Upregulation of METTL14 mediates the elevation of PERP mRNA N6 adenosine methylation promoting the growth and metastasis of pancreatic cancer.
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Wang, Min, Liu, Jun, Zhao, Yan, He, Ruizhi, Xu, Xiaodong, Guo, Xingjun, Li, Xu, Xu, Simiao, Miao, Ji, Guo, Jianpin, Zhang, Hang, Gong, Jun, Zhu, Feng, Tian, Rui, Shi, Chengjian, Peng, Feng, Feng, Yechen, Yu, Shuo, Xie, Yu, and Jiang, Jianxin
- Subjects
ADENOSINES ,PANCREATIC cancer ,METASTASIS ,CANCER cell proliferation ,CANCER cell migration ,MESSENGER RNA - Abstract
Background: Pancreatic cancer is one of the most lethal human cancers. N
6 -methyladenosine (m6 A), a common eukaryotic mRNA modification, plays critical roles in both physiological and pathological processes. However, its role in pancreatic cancer remains elusive. Methods: LC/MS was used to profile m6 A levels in pancreatic cancer and normal tissues. Bioinformatics analysis, real-time PCR, immunohistochemistry, and western blotting were used to identify the role of m6 A regulators in pancreatic cancer. The biological effects of methyltransferase-like 14 (METTL14), an mRNA methylase, were investigated using in vitro and in vivo models. MeRIP-Seq and RNA-Seq were used to assess the downstream targets of METTL14. Results: We found that the m6 A levels were elevated in approximately 70% of the pancreatic cancer samples. Furthermore, we demonstrated that METTL14 is the major enzyme that modulates m6 A methylation (frequency and site of methylation). METTL14 overexpression markedly promoted pancreatic cancer cell proliferation and migration both in vitro and in vivo, via direct targeting of the downstream PERP mRNA (p53 effector related to PMP-22) in an m6 A-dependent manner. Methylation of the target adenosine lead to increased PERP mRNA turnover, thus decreasing PERP (mRNA and protein) levels in pancreatic cancer cells. Conclusions: Our data suggest that the upregulation of METTL14 leads to the decrease of PERP levels via m6 A modification, promoting the growth and metastasis of pancreatic cancer; therefore METTL14 is a potential therapeutic target for its treatment. [ABSTRACT FROM AUTHOR]- Published
- 2020
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16. Paclitaxel and cisplatin combined with intensity-modulated radiotherapy for upper esophageal carcinoma.
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Tu, Lingli, Sun, Lan, Xu, Yong, Wang, Yongsheng, Zhou, Lin, Liu, Yongmei, Zhu, Jiang, Peng, Feng, Wei, Yuquan, and Gong, Youling
- Abstract
Purpose: This study was conducted to evaluate the effectiveness and safety of intensity-modulated radiotherapy (IMRT) and concurrent paclitaxel plus cisplatin (TP regimen) for upper esophageal carcinoma.Methods: 36 patients of upper esophageal carcinoma were retrospectively analyzed. Patients were treated with IMRT (median 60 Gy) combined with concurrent TP regimen chemotherapy. The Kaplan-Meier analysis was performed in statistical analysis. Toxicities were recorded according to the NCI CTC version 3.0.Results: 36 patients aged 43-73 years (median 57 years). The median follow-up period was 14.0 months. The 1-year and 2-year survival rates were 83.3% and 42.8% respectively. The median progression-free survival (PFS) time and overall survival (OS) time were 12.0 (95% CI: 7.8-16.2 months) and 18.0 months (95% CI: 9.9-26.1 months), respectively. Grade 3 neutropenia, radiation-induced esophagitis and radiodermatitis were observed in 5 (13.9%), 3 (8.3%) and 8 (22.2%) patients respectively. There were two treatment-related deaths due to esophageal perforation and hemorrhea.Conclusions: For those patients with upper esophageal carcinoma, IMRT combined with concurrent TP regimen chemotherapy was an effective treatment. However, more attention should be paid to the occurrence of perforation and hemorrhea. [ABSTRACT FROM AUTHOR]- Published
- 2013
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17. Efficient gene editing in Corynebacterium glutamicum using the CRISPR/Cas9 system.
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Peng F, Wang X, Sun Y, Dong G, Yang Y, Liu X, and Bai Z
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- Endonucleases genetics, Gene Deletion, Genetic Vectors, Mutagenesis, Insertional, Plasmids, Point Mutation, RNA, Guide, CRISPR-Cas Systems, CRISPR-Cas Systems, Corynebacterium glutamicum genetics, Gene Editing methods
- Abstract
Background: Corynebacterium glutamicum (C. glutamicum) has traditionally been used as a microbial cell factory for the industrial production of many amino acids and other industrially important commodities. C. glutamicum has recently been established as a host for recombinant protein expression; however, some intrinsic disadvantages could be improved by genetic modification. Gene editing techniques, such as deletion, insertion, or replacement, are important tools for modifying chromosomes., Results: In this research, we report a CRISPR/Cas9 system in C. glutamicum for rapid and efficient genome editing, including gene deletion and insertion. The system consists of two plasmids: one containing a target-specific guide RNA and a homologous sequence to a target gene, the other expressing Cas9 protein. With high efficiency (up to 100%), this system was used to disrupt the porB, mepA, clpX and Ncgl0911 genes, which affect the ability to express proteins. The porB- and mepA-deletion strains had enhanced expression of green fluorescent protein, compared with the wild-type stain. This system can also be used to engineer point mutations and gene insertions., Conclusions: In this study, we adapted the CRISPR/Cas9 system from S. pyogens to gene deletion, point mutations and insertion in C. glutamicum. Compared with published genome modification methods, methods based on the CRISPR/Cas9 system can rapidly and efficiently achieve genome editing. Our research provides a powerful tool for facilitating the study of gene function, metabolic pathways, and enhanced productivity in C. glutamicum.
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- 2017
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18. A preliminary investigation on single nucleotide polymorphism rs2287622 of bile salt export pump gene in patients with chronic hepatitis C virus infection in Hunan, China.
- Author
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Lei JH, Yang X, Xiao XQ, Chen Z, and Peng F
- Subjects
- ATP Binding Cassette Transporter, Subfamily B, Member 11, Adolescent, Adult, Aged, Case-Control Studies, China, Drugs, Chinese Herbal, Eleutherococcus, Female, Gene Frequency, Genetic Predisposition to Disease, Genotype, Hepatitis B, Chronic genetics, Humans, Male, Middle Aged, Odds Ratio, Polymerase Chain Reaction, Polymorphism, Restriction Fragment Length, Polymorphism, Single Nucleotide, Sequence Analysis, DNA, Viral Load, Young Adult, ATP-Binding Cassette Transporters genetics, Asian People genetics, Hepatitis C, Chronic genetics
- Abstract
Background: European researchers have underscored associations between single nucleotide polymorphism (SNP) rs2287622 of the hepatobiliary bile salt export pump (BSEP) gene and the risk of hepatitis C virus (HCV) infection. The distributions of SNP rs2287622 are racially specific. This study was aimed to preliminarily investigate the distribution of BSEP gene SNP rs2287622 in the Han patients with chronic HCV-infection (CHC) in Hunan, China., Methods: BSEP gene SNP rs2287622 of 165 CHC patients, 99 patients with chronic hepatitis B virus infection (CHB) and 99 healthy individuals were analyzed by polymerase chain reaction-restriction fragment length polymorphism analysis and nucleotide sequencing., Results: The overall frequencies of the C allele of BESP gene SNP rs2287622 in the CHC patients, CHB patients and healthy individuals were 74.2, 72.7 and 74.2%, respectively (P > 0.05). The overall odds ratios (ORs) aiming at predicting CHC risk by comparing the ratios of the frequency distribution of alleles or genotypes in the CHC group with those in the non-CHC group had no statistical significance (P > 0.05). However, the CHC ORs of CC vs TT, TC vs TT and CC + CT vs TT among the individuals aged over 40 years were 2.680, 3.122 and 2.824 respectively (P < 0.05), and the higher risk did not relate to gender, HCV genotypes and presence of HCV-related liver cirrhosis., Conclusions: Among the Han individuals aged over 40 years in Hunan, China, genotype CC or CT of BSEP gene SNP rs2287622 may correlate with higher risk of CHC in comparison with genotype TT. Further study with a larger cohort is essential.
- Published
- 2017
- Full Text
- View/download PDF
19. Downsizing a pullulanase to a small molecule with improved soluble expression and secretion efficiency in Escherichia coli.
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Chen A, Sun Y, Zhang W, Peng F, Zhan C, Liu M, Yang Y, and Bai Z
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- Escherichia coli Proteins genetics, Escherichia coli Proteins metabolism, Fermentation physiology, Glycoside Hydrolases genetics, Periplasm genetics, Periplasm metabolism, Escherichia coli enzymology, Glycoside Hydrolases metabolism
- Abstract
Background: Significant challenges, including low expression and extracellular secretion of soluble protein, are encountered in expressing and purifying Bacillus acidopullulyticus pullulanase (BaPul) in Escherichia coli., Methods: An N-terminal domain truncation was adopted to facilitate BaPul variant expression and/or secretion., Results: BaPul possesses a complex modular architecture that consists of CBM41-X45a-X25-X45b-CBM48-GH13. The activities of M1 (ΔCBM41) and M5 (ΔCBM41ΔX25) variants were 2.9- and 2.4-fold that of wild-type (WT) enzyme, respectively. The enhanced expression of soluble protein is the main reason for these improved activities. PelB-M1 and PelB-M5 were transported to the periplasmic space, where PelB is part of the PelB-pET28a(+) construct, and PelB-M3 (ΔX25) and PelB-WT variants were largely retained in the cytoplasm. After fermentation, about 56.6 and 93.4 % of the total activity of PelB-M1 and PelB-M5 were transferred to the periplasm, respectively, followed by cell lysis and leakage of the partial enzyme into the extracellular medium. The optimal temperature and pH for purified preparations of M1, M3, and M5 were similar to those of the WT enzyme. In a starch saccharification reaction, the dextrose equivalents of M1, M3, and M5 proteins were 94.7, 94.5, and 93.1 %, respectively, which were also essentially identical to that of WT (93.6 %)., Conclusion: The deletion of CBM41 and/or X25 domain did not affect the enzyme application, and the truncated variants were more highly expressed and secreted in E. coli. Thus, the truncated variants may be more suitable for industrial applications.
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- 2016
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20. Functional relationship of furfural yields and the hemicellulose-derived sugars in the hydrolysates from corncob by microwave-assisted hydrothermal pretreatment.
- Author
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Li H, Chen X, Ren J, Deng H, Peng F, and Sun R
- Abstract
Background: Corncob as one of the most suitable feedstock for the production of a variety of high-value-added chemicals is receiving increasing attention worldwide because of the characteristics of high carbohydrate (cellulose and hemicelluloses) contents and high energy densities. Furfural produced from hemicelluloses is a highly versatile and key feedstock used in the manufacture of a wide range of biofuel and important chemicals in different fields. Achieving high furfural yields from corncob combining green approaches and efficient equipment has the promising potential for biomass-to-biofuel technologies. To understand the dissolving mechanism of corncob sugars and reveal the relationship between the hydrolysate composition and furfural yields, a two-step approach was proposed using microwave-assisted hydrothermal pretreatment and subsequently heterogeneous catalytic process., Results: Released hemicelluloses in the first stage were mainly in forms of monosaccharide, oligosaccharides, and water-soluble polysaccharide. Hydrolysates with the maximum xylose content (99.94 mg g(-1), 160 °C, 90 min), the maximum xylobiose content (20.89 mg g(-1), 180 °C, 15 min), and the maximum total xylose content in monosaccharide and oligosaccharides (DP ≤ 6) (272.06 mg g(-1), 160 °C, 60 min) were further converted to furfural using tin-loaded montmorillonite as the catalyst in a biphasic system. The highest furfural yield (57.80 %) was obtained at 190 °C for 10 min from hydrolysates with the maximum xylose content. Moreover, controlled experiments showed that furfural yields from corncob hydrolysates were higher than those from the pure xylose solutions, and lower initial xylose concentration may be in favor of the furfural production., Conclusions: This work provides an efficient approach to produce furfural by a two-step process for the biomass-to-biofuel industry. Results indicated that the production of furfural from biomass raw materials can be controlled by the depolymerization degree of hemicelluloses.
- Published
- 2015
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21. Concurrent paclitaxel-based chemo-radiotherapy for post-surgical microscopic residual tumor at the bronchial margin (R1 resection) in non-small-cell lung cancer.
- Author
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Zhou M, Li T, Liu Y, Sun C, Li N, Xu Y, Zhu J, Ding Z, Wang Y, Huang M, Peng F, Wang J, Ren L, Lu Y, and Gong Y
- Subjects
- Adult, Aged, Carcinoma, Non-Small-Cell Lung mortality, Chemoradiotherapy adverse effects, Chemoradiotherapy methods, Female, Follow-Up Studies, Humans, Kaplan-Meier Estimate, Lymph Nodes pathology, Male, Middle Aged, Neoplasm Staging, Postoperative Care, Retrospective Studies, Treatment Outcome, Carcinoma, Non-Small-Cell Lung pathology, Carcinoma, Non-Small-Cell Lung therapy, Lung Neoplasms pathology, Lung Neoplasms therapy, Neoplasm, Residual pathology
- Abstract
Background: The microscopic residual tumor at the bronchial margin after radical surgery (R1 resection) affects prognosis negatively in non-small-cell lung cancer (NSCLC) patients. For patients with good performance status, a potential cure still exists. Here, we report the outcomes of concurrent paclitaxel-based chemo-radiotherapy (CRT) for NSCLC patients with microscopically positive bronchial margins or peribronchial infiltration., Methods: A retrospective search in the clinical database was conducted in three hospitals. Patients were identified and evaluated if treated with radiotherapy combined with paclitaxel-based chemotherapy. The objects analyzed were local control time, progression-free survival (PFS), overall survival (OS), and treatment-related toxicity., Results: Sixty-one patients with microscopic residual tumor at the bronchial stump following pulmonary lobectomy were identified. Forty-six patients who had received concurrent paclitaxel-based CRT were analyzed. The median follow-up was 40 months (range: 15.0-77.5 months). The 1-, 2- and 3-year survival rates were 97.8%, 60.9% and 36.9%, respectively. The local recurrences were recorded in 19.6% (9/46) patients. Median PFS and OS for the evaluated cohort were 23.0 [95% confidence interval (CI): 21.3-24.7] and 32.0 (95% CI: 23.7-40.3) months, respectively. The most common side effects were hematological toxicity (neutropenia, 93.5%; anemia, 89.1%; and thrombocytopenia, 89.1%) and no treatment-related deaths. Grade ≥2 acute radiation-induced pneumonitis and esophagitis were recorded in 43.5% (20/46) and 26.1% (12/46) patients, respectively. By univariate analysis, non-squamous cell lung cancer was associated with a significantly longer survival time (45.1 vs 26.4 months, p = 0.013)., Conclusions: For NSCLC patients with post-surgical microscopic residual tumor at the bronchial stump, concurrent paclitaxel-based chemo-radiotherapy achieved promising outcomes with accepted treatment-related toxicity.
- Published
- 2015
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22. Salvage concurrent radio-chemotherapy for post-operative local recurrence of squamous-cell esophageal cancer.
- Author
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Zhang J, Peng F, Li N, Liu Y, Xu Y, Zhou L, Wang J, Zhu J, Huang M, and Gong Y
- Subjects
- Adult, Antineoplastic Agents administration & dosage, Cisplatin administration & dosage, Disease-Free Survival, Esophagectomy, Female, Fluorouracil administration & dosage, Humans, Male, Middle Aged, Paclitaxel administration & dosage, Retrospective Studies, Treatment Outcome, Carcinoma, Squamous Cell therapy, Chemoradiotherapy, Esophageal Neoplasms therapy, Neoplasm Recurrence, Local therapy, Salvage Therapy methods
- Abstract
Purpose: To evaluate the treatment outcome of salvage concurrent radio-chemotherapy for patients with loco-recurrent esophageal cancer after surgery., Methods: 50 patients with loco-recurrent squamous-cell cancer after curative esophagectomy were retrospectively analyzed. Patients were treated with radiotherapy (median 60 Gy) combined with chemotherapy consisting of either 5-fluorouracil (5-FU) plus cisplatin (DDP) (R-FP group) or paclitaxel plus DDP (R-TP group)., Results: The median follow-up period was 16.0 months. The 1-year and 3-year survival rates were 56% and 14%, respectively. The median progression-free survival (PFS) and overall survival (OS) time was 9.8 and 13.3 months respectively. There was no statistical significance of the PFS of the two groups. The OS (median 16.3 months) in the R-TP group was superior to that in the R-FP group (median: 9.8 months) (p = 0.012). Among the patients who had received ≥60 Gy irradiation dose, the median PFS (10.6 months) and OS (16.3 months) were significantly superior to the PFS (8.7 months) and OS (11.3 months) among those patients did not (all p < 0.05). Grade 3 treatment-related gastritis were observed in 6 (27.3%) and 7 (25%) patients in the R-FP and R-TP group respectively. By univariate survival analysis, the age (<60 years), TP regimen and higher irradiation dose might improve the OS of such patients in present study., Conclusions: For those patients with post-operative loco-recurrent squamous-cell esophageal carcinoma, radiotherapy combined with either FP or TP regimen chemotherapy was an effective salvage treatment. Younger age, treatment with the TP regimen and an irradiation dose ≥60 Gy might improve the patients' treatment outcome.
- Published
- 2012
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