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Zhang F, Xu J, Wang XX, Cheng YQ, Chen W. [Magnetic resonance imaging T 2 mapping could reflect disease status in patients with dermatomyositis or polymyositis]. Zhonghua Nei Ke Za Zhi 2024; 63:401-405. [PMID: 38561286 DOI: 10.3760/cma.j.cn112138-20231014-00211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
This study aimed to explore the value of magnetic resonance imaging (MRI) T2 mapping in the assessment of dermatomyositis (DM) and polymyositis (PM). Thirty-three confirmed cases (myosin group) and eight healthy volunteers (healthy control group) at the Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, from October 2016 to December 2017, were collected and analyzed. Multiple parameters of the myosin group were quantified, including creatine kinase (CK), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), complement C3, and complement C4. Disease status was evaluated using a panel of tools: myositis disease activity assessment tool-muscle (MDAAT-muscle), myositis disease activity assessment tool-whole (MDAAT-all), health assessment questionnaire (HAQ), medical outcomes study health survey short form-36 item (SF-36), hand muscle strength test (MMT-8) score, and MRI T2 mapping of muscle (22 muscles in the pelvis and thighs) T2 values. The results showed that in the myositis group, the measurements for CK, ESR, CRP, complement C3, and complement C4 were 457.2 (165.6, 1 229.2) IU/L, 20 (10, 42) mm/1h, 3.25 (2.38, 10.07) mg/L, 0.90 (0.83, 1.06) g/L, and 0.18 (0.14, 0.23) g/L, respectively. The scores for MMT-8, MDAAT-muscle, MDAAT-all, HAQ, and SF-36 were 57.12±16.23, 5.34 (4.00, 6.00), 34.63±12.62, 1.55 (0.66, 2.59), and 44.66±7.98, respectively. T2 values were significantly higher in all 22 muscles of the pelvis and thighs of patients with DM or PM compared with the healthy controls [(54.99±11.60)ms vs. (36.62±1.66)ms, P<0.001], with the most severe lesions in the satrorius, iliopsoas, piriformis, gluteus minimus, and gluteus medius muscles. The total muscle T2 value in the myositis group was positively correlated with CK, MDAAT-muscle, MDAAT-all, and HAQ (r=0.461, 0.506, 0.347, and 0.510, respectively, all P<0.05). There was a negative correlation between complement C4, SF-36, and MMT-8 scores (r=-0.424, -0.549, and -0.686, respectively, all P<0.05). Collectively, the findings from this study suggest that MRI T2 mapping can objectively reflect the disease status of DM and PM.
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Affiliation(s)
- F Zhang
- Department of Rheumatology and Immunology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - J Xu
- Department of Rheumatology and Immunology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - X X Wang
- Yunnan Provincial Clinical Medicine Research Center of Rheumatism in Traditional Chinese Medicine,Yunnan Provincial Hospital of Traditional Chinese Medicine,Kunming 650021, China
| | - Y Q Cheng
- Department of Psychiatry, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - W Chen
- Department of Medical Imaging, First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
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Cheng YQ, Wang GF, Zhou XL, Lin M, Zhang XW, Huang Q. Early adenocarcinoma mixed with a neuroendocrine carcinoma component arising in the gastroesophageal junction: A case report. World J Gastrointest Oncol 2024; 16:563-570. [PMID: 38425401 PMCID: PMC10900165 DOI: 10.4251/wjgo.v16.i2.563] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/09/2023] [Accepted: 01/04/2024] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND Early adenocarcinoma mixed with a neuroendocrine carcinoma (NEC) component arising in the gastroesophageal junctional (GEJ) region is rare and even rarer in young patients. Here, we report such a case in a 29-year-old Chinese man. CASE SUMMARY This patient presented to our hospital with a 3-mo history of dysphagia and regurgitation. Upper endoscopy revealed an elevated nodule in the distal esophagus 1.6 cm above the GEJ line, without Barrett's esophagus or involvement of the gastric cardia. The nodule was completely resected by endoscopic submucosal dissection (ESD). Pathological examination confirmed diagnosis of intramucosal adenocarcinoma mixed with an NEC component, measuring 1.5 cm. Immunohistochemically, both adenocarcinoma and NEC components were positive for P53 with a Ki67 index of 90%; NEC was positive for synaptophysin and chromogranin. Next-generation sequencing of 196 genes demonstrated a novel germline mutation of the ERCC3 gene in the DNA repair pathway and a germline mutation of the RNF43 gene, a common gastric cancer driver gene, in addition to pathogenic somatic mutations in P53 and CHEK2 genes. The patient was alive without evidence of the disease 36 mo after ESD. CONCLUSION Early adenocarcinoma with an NEC component arising in the distal esophageal side of the GEJ region showed evidence of gastric origin.
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Affiliation(s)
- Yu-Qing Cheng
- Department of Pathology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou 213164, Jiangsu Province, China
| | - Geng-Fang Wang
- Department of Pathology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou 213164, Jiangsu Province, China
| | - Xiao-Li Zhou
- Department of Pathology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou 213164, Jiangsu Province, China
| | - Min Lin
- Gastroenterology Center, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou 213164, Jiangsu Province, China
| | - Xin-Wen Zhang
- Department of Pathology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou 213164, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Qin Huang
- Department of Pathology, The Affiliated Changzhou No. 2 People’s Hospital of Nanjing Medical University, Changzhou 213164, Jiangsu Province, China
- Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, United States
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Jia R, Wang WX, Zhou ZP, Nie WM, Cheng YQ, Zhao J, Lian F, Luan JQ, Wang FS, Fu JL. [Analysis of the therapeutic efficacy and factors influencing sequential combination of nucleos(t)ide analogues with pegylated interferon alpha for 48~96 weeks in the treatment of patients with chronic hepatitis B]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:1290-1296. [PMID: 38253073 DOI: 10.3760/cma.j.cn501113-20231124-00227] [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] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Objective: To explore the therapeutic efficacy and factors influencing the sequential combination of nucleos(t)ide analogues (NAs) with pegylated interferon alpha (Peg-IFN-α) in the treatment of patients with chronic hepatitis B (CHB). Methods: 144 CHB cases with NAs treatment for more than 1 year, HBV DNA < 20 IU/ml, hepatitis B surface antigen (HBsAg) quantification < 3 000 IU/ml, treated with a sequential combination of Peg-IFN-α treatment for 48 to 96 weeks, and followed up were selected from the Fifth Medical Center of the PLA General Hospital between May 2018 and May 2020. Intention-to-treat analysis was used to measure the HBsAg clearance rate at 96 weeks. The Kaplan-Meier method was used to compute the cumulative HBsAg clearance rate at 96 weeks. Univariate and multivariate logistic regression were used to analyze the factors influencing HBsAg clearance at 48 weeks of sequential combination therapy. Univariate and multifactorial COX proportional hazard models were used to analyze the factors influencing HBsAg clearance following 96 weeks of prolonged PEG-IFN-α treatment. The receiver operating characteristic curve was used to assess the predictive value of factors influencing HBsAg clearance. A Mann-Whitney U test was used to compare the measurement data between groups. The count data was compared using the χ(2) test between groups. Results: 41 (28.47%) cases achieved HBsAg clearance at 48 weeks of sequential combination therapy. The HBsAg clearance rate at 96 weeks was 40.28% (58/144) by intention-to-treat analysis. The Kaplan-Meier method computed that the cumulative HBsAg clearance rate at 96 weeks was 68.90%. Multivariate logistic regression analysis showed that HBsAg quantification at baseline (OR = 0.090, 95%CI: 0.034-0.240, P < 0.001) and a 24-week drop in HBsAg level (OR = 7.788, 95%CI: 3.408-17.798, P < 0.001) were independent predictors of HBsAg clearance in CHB patients treated sequentially in combination with NAs and Peg-IFN-α for 48 weeks. Receiver operating characteristic curve analysis showed that the baseline HBsAg quantification [area under the receiver operating characteristic curve (AUC), 0.911, 95% CI: 0.852-0.952)] and 24-week drop in HBsAg level (AUC = 0.881, 95%CI: 0.814-0.930) had equally good predictive value for 48-week HBsAg clearance, but there was no statistically significant difference between the two (Z = 0.638, P = 0.523). The value of the combination of baseline HBsAg quantification and 24-week drop in HBsAg level (AUC = 0.981, 95%CI: 0.941-0.997) was superior to that of single baseline HBsAg quantification (Z = 3.017, P = 0.003) and 24-week drop in HBsAg level (Z = 3.214, P = 0.001) in predicting HBsAg clearance rate at 48 weeks. Multivariate COX proportional hazards model analysis showed that HBsAg quantification at 48 weeks (HR = 0.364, 95%CI: 0.176-0.752, P = 0.006) was an independent predictor of HBsAg clearance with a prolonged course to 96 weeks of Peg-IFN-α treatment. Conclusion: The HBsAg clearance rate can be accurately predicted with baseline HBsAg quantification combined with a 24-week drop in HBsAg level in patients with CHB who are treated with a sequential combination of NAs and Peg-IFN-α therapy for 48 weeks. Prolonging the course of Peg-IFN-α treatment can enhance the HBsAg clearance rate's capability. An independent predictor of HBsAg clearance is HBsAg quantification at 48 weeks of sequential combination therapy with a prolonged course of 96 weeks of Peg-IFN-α treatment.
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Affiliation(s)
- R Jia
- Senior Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China Department of Gastroenterology, the 985th Hospital of Chinese PLA Joint Support Force, Taiyuan 030001, China
| | - W X Wang
- Senior Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China Peking University 302 Clinical Medical School, Beijing 100039, China
| | - Z P Zhou
- Senior Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - W M Nie
- Senior Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - Y Q Cheng
- Department of Geriatric Medicine, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - J Zhao
- Department of Liver Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - F Lian
- Senior Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - J Q Luan
- Senior Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - F S Wang
- Senior Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China Peking University 302 Clinical Medical School, Beijing 100039, China
| | - J L Fu
- Peking University 302 Clinical Medical School, Beijing 100039, China Department of Infectious Diseases, the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
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Zhang JB, Li MT, Lin SZ, Cheng YQ, Fan JG, Chen YW. Therapeutic Effect of Prolyl Endopeptidase Inhibitor in High-fat Diet-induced Metabolic Dysfunction-associated Fatty Liver Disease. J Clin Transl Hepatol 2023; 11:1035-1049. [PMID: 37577240 PMCID: PMC10412699 DOI: 10.14218/jcth.2022.00110] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/13/2023] [Accepted: 02/27/2023] [Indexed: 07/03/2023] Open
Abstract
Background and Aims Prolyl endopeptidase (PREP) is a serine endopeptidase that participates in many pathological processes including inflammation, oxidative stress, and autophagy. Our previous studies found that PREP knockout exhibited multiple benefits in high-fat diet (HFD) or methionine choline-deficient diet-induced metabolic dysfunction-associated fatty liver disease (MAFLD). However, cumulative studies have suggested that PREP performs complex functions during disease development. Therefore, further understanding the role of PREP in MAFLD development is the foundation of PREP intervention. Methods In this study, an HFD-induced MAFLD model at different time points (4, 8, 12, and 16 weeks) was used to explore dynamic changes in the PREP proline-glycine-proline (PGP)/N-acetyl-seryl-aspartyl-lysyl-proline (AcSDKP) system. To explore its potential value in MAFLD treatment, saline, or the PREP inhibitor, KYP-2047, was administered to HFD-induced MAFLD mice from the 10th to 16th weeks. Results PREP activity and expression were increased in HFD-mice compared with control mice from the 12th week onwards, and increased PREP mainly resulted in the activation of the matrix metalloproteinase 8/9 (MMP8/9)-PREP-PGP axis rather than the thymosin β4-meprin α/PREP-AcSDKP axis. In addition, KYP-2047 reduced HFD-induced liver injury and oxidative stress, improved lipid metabolism through the suppression of lipogenic genes and the induction of β-oxidation-related genes, and attenuated hepatic inflammation by decreasing MMP8/9 and PGP. Moreover, KYP2047 restored HFD-induced impaired autophagy and this was verified in HepG2 cells. Conclusions These findings suggest that increased PREP activity/expression during MAFLD development might be a key factor in the transition from simple steatosis to steatohepatitis, and KYP-2047 might possess therapeutic potential for MAFLD treatment.
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Affiliation(s)
- Jian-Bin Zhang
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Department of Gastroenterology, Huadong Hospital, Fudan University, Shanghai, China
| | - Meng-Ting Li
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Department of Gastroenterology, The Affiliated People's Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Shuang-Zhe Lin
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yu-Qing Cheng
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jian-Gao Fan
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yuan-Wen Chen
- Department of Gastroenterology, Huadong Hospital, Fudan University, Shanghai, China
- Department of Geriatrics, Huadong Hospital, Fudan University, Shanghai, China
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Lin SZ, Wu WJ, Cheng YQ, Zhang JB, Jiang DX, Ren TY, Ding WJ, Liu M, Chen YW, Fan JG. Prolyl endopeptidase remodels macrophage function as a novel transcriptional coregulator and inhibits fibrosis. Exp Mol Med 2023:10.1038/s12276-023-01027-8. [PMID: 37394591 PMCID: PMC10394032 DOI: 10.1038/s12276-023-01027-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/28/2023] [Accepted: 04/06/2023] [Indexed: 07/04/2023] Open
Abstract
Macrophages are immune cells crucial for host defense and homeostasis maintenance, and their dysregulation is involved in multiple pathological conditions, such as liver fibrosis. The transcriptional regulation in macrophage is indispensable for fine-tuning of macrophage functions, but the details have not been fully elucidated. Prolyl endopeptidase (PREP) is a dipeptidyl peptidase with both proteolytic and non-proteolytic functions. In this study, we found that Prep knockout significantly contributed to transcriptomic alterations in quiescent and M1/M2-polarized bone marrow-derived macrophages (BMDMs), as well as aggravated fibrosis in an experimental nonalcoholic steatohepatitis (NASH) model. Mechanistically, PREP predominantly localized to the macrophage nuclei and functioned as a transcriptional coregulator. Using CUT&Tag and co-immunoprecipitation, we found that PREP was mainly distributed in active cis-regulatory genomic regions and physically interacted with the transcription factor PU.1. Among PREP-regulated downstream genes, genes encoding profibrotic cathepsin B and D were overexpressed in BMDMs and fibrotic liver tissue. Our results indicate that PREP in macrophages functions as a transcriptional coregulator that finely tunes macrophage functions, and plays a protective role against liver fibrosis pathogenesis.
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Affiliation(s)
- Shuang-Zhe Lin
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Wei-Jie Wu
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
- Gastrointestinal Endoscopy Center, Fujian Provincial Hospital South Branch, Fuzhou, 350003, Fujian, China
| | - Yu-Qing Cheng
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Jian-Bin Zhang
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Dai-Xi Jiang
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Tian-Yi Ren
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, 200092, China
| | - Wen-Jin Ding
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Mingxi Liu
- State Key Laboratory of Reproductive Medicine, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou School of Clinical Medicine, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
| | - Yuan-Wen Chen
- Department of Gastroenterology, Huadong Hospital Affiliated to Fudan University, Shanghai, 200040, China.
- Department of Gerontology, Huadong Hospital Affiliated to Fudan University, Shanghai, 200040, China.
| | - Jian-Gao Fan
- Department of Gastroenterology, Xin Hua Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China.
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, 200092, China.
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Wu JJ, Cheng YQ, Yang HJ, Lin M. Correlation between gastritis cystica profunda and the risk of lymph node metastasis in early gastric cancer. Neoplasma 2022; 69:1459-1465. [PMID: 36591799 DOI: 10.4149/neo_2022_220314n281] [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] [Received: 03/14/2022] [Accepted: 11/09/2022] [Indexed: 12/31/2022]
Abstract
In early gastric cancer (EGC) patients, lymph node metastasis (LNM) risk assessment is particularly important for the selection of surgical methods. In this study, we investigated the correlation between gastritis cystica profunda (GCP) and the risk of LNM in EGC. From January 2014 to December 2019, EGC patients who underwent curative radical gastrectomy were enrolled in this study. The clinicopathological features were analyzed, and the correlation between GCP and the risk of lymph node metastasis was assessed. Data for 180 EGC patients were analyzed, and 17.8% (32/180) had LNM. The incidence of LNM was 2.6% in the GCP-positive group and 21.8% in the GCP-negative group. Univariate analysis revealed that GCP, depth of tumor invasion, and lymphovascular invasion were the risk factors of LNM in EGC patients. Multiple regression analysis showed that GCP was associated with the risk of LNM in EGC patients (OR=0.097, 0.121, 0.100, p<0.05). The curve fitting results showed that there was a negative correlation between the GCP and LNM in EGC, which was consistent between different tumor sites, size, ulceration, differentiation types, depth of tumor invasion, lymphovascular invasion, and no significant interaction was found among these factors (p for interaction range 0.224-0.717). GCP is closely related to LNM in EGC. Preoperative assessment of whether EGC is combined with GCP is beneficial for the assessment of the risk of LNM.
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Affiliation(s)
- Jia-Jia Wu
- Department of Gastroenterology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, China
| | - Yu-Qing Cheng
- Department of Pathology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, China
| | - Hao-Jun Yang
- Department of General Surgery, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, China
| | - Min Lin
- Department of Gastroenterology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, China
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Lu SS, Liu WJ, Niu QY, Huo CY, Cheng YQ, Wang EJ, Li RN, Feng FF, Cheng YM, Liu R, Huang J. Establishing a rabbit model of perianal fistulizing Crohn’s disease. World J Gastroenterol 2022; 28:1536-1547. [PMID: 35582134 PMCID: PMC9048459 DOI: 10.3748/wjg.v28.i15.1536] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 01/18/2022] [Accepted: 03/06/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Crohn's disease (CD) is a chronic nonspecific intestinal inflammatory disease. The aetiology and pathogenesis of CD are still unclear. Anal fistula is the main complication of CD and is a difficult problem to solve at present. The main limitation of developing new therapies is bound up with the short of preclinical security and effectiveness data. Therefore, an ideal animal model is needed to establish persistent anal fistula and an inflamed rectal mucosa.
AIM To improve the induction method of colitis and establish a reliable and reproducible perianal fistulizing Crohn’s disease animal model to evaluate new treatment strategies.
METHODS Twenty male New Zealand rabbits underwent rectal enema with different doses of 2,4,6-trinitrobenzene sulfonic acid to induce proctitis. Group A was treated with an improved equal interval small dose increasing method. The dosage of group B was constant. Seven days later, the rabbits underwent surgical creation of a transsphincteric fistula. Then, three rabbits were randomly selected from each group every 7 d to remove the seton from the fistula. The rabbits were examined by endoscopy every 7 days, and biopsy forceps were used to obtain tissue samples from the obvious colon lesions for histological analysis. The disease activity index (DAI), colonoscopy and histological scores were recorded. Perianal endoscopic ultrasonography (EUS) was used to evaluate the healing of fistulas.
RESULTS Except for the DAI score, the colonoscopy and histological scores in group A were significantly higher than those in group B (P < 0.05). In the ideal model rabbit group, on the 7th day after the removal of the seton, all animals had persistent lumens on EUS imaging, showing continuous full-thickness high signals. Histological inspection of the fistula showed acute and chronic inflammation, fibrosis, epithelialization and peripheral proctitis of the adjoining rectum.
CONCLUSION The improved method of CD colitis induction successfully established a rabbit perianal fistula CD preclinical model, which was confirmed by endoscopy and pathology.
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Affiliation(s)
- Shuang-Shuang Lu
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Wen-Jia Liu
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Qiu-Ya Niu
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Chun-Yan Huo
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Yu-Qing Cheng
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - En-Jing Wang
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Nanjing Medical University, Nanjing 210000, Jiangsu Province, China
| | - Rong-Nan Li
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Fang-Fang Feng
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Yi-Ming Cheng
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
| | - Rong Liu
- Medical Statistics Center, Changzhou University, Changzhou 213000, Jiangsu Province, China
| | - Jin Huang
- Gastroenterology Center, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Graduate School, Dalian Medical University, Dalian 116044, Liaoning Province, China
- Medical Statistics Center, Changzhou University, Changzhou 213000, Jiangsu Province, China
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Hua F, Jin L, Zhou XL, Cheng YQ. [Concomitant medullary and papillary thyroid carcinoma identified by fine needle aspiration: report of a case]. Zhonghua Bing Li Xue Za Zhi 2021; 50:1393-1395. [PMID: 34865435 DOI: 10.3760/cma.j.cn112151-20210330-00248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- F Hua
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
| | - L Jin
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
| | - X L Zhou
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
| | - Y Q Cheng
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, Jiangsu Province, China
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Jia R, Wang WX, Gao YY, Luan JQ, Qiao F, Liu JY, Yuan JH, Cheng YQ, Wang FS, Fu JL. [Early reduction of serum RANTES can predict HBsAg clearance in patients with chronic hepatitis B treated with nucleos(t)ide analogues combined with peginterferon alpha]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:666-672. [PMID: 34371537 DOI: 10.3760/cma.j.cn501113-20210706-00322] [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 observe the dynamic changes of serum RANTES during the treatment with nucleos(t)ide analogues combined with pegylated interferon alpha (peginterferon-α), and further analyze the predictive effect of RANTES on HBsAg clearance in patients with chronic hepatitis B. Methods: 98 cases of chronic hepatitis B with quantitative HBsAg < 3 000 IU/ml and HBV DNA < 20 IU/ml after≥1 year NAs treatment were enrolled. Among them, 26 cases continued to receive NAs monotherapy, 72 cases received NAs combined with pegylated interferon alpha therapy. The changes in RANTES during treatment were observed. The receiver operating characteristic curve was used to analyze the early changes of RANTES to predict the HBsAg clearance during 48 weeks. Results: During 48 weeks, 15 cases (20.83%) had achieved HBsAg clearance in combination group, while no patient had achieved HBsAg clearance in NAs group. The overall serum RANTES level had decreased from baseline in NAs and combination group. At week 48, in the combination group, the serum RANTES level was decreased more significantly in patients with HBsAg clearance than patients without. Further analysis showed that, in combination group, HBsAg clearance rate of patients with serum RANTES decreased at week 12 and 24 was higher than patients with elevated (29.17% vs. 4.17%, P = 0.014; 28.00% vs. 4.55%, P = 0.052), and quantitative HBsAg reduction was larger significantly [(1.49 ± 1.26) log(10)IU/ml vs. (0.73 ± 0.81) log(10)IU/ml, P = 0.017; (1.54 ± 1.27) log(10)IU/ml vs. (0.57 ± 0.56) log(10)IU/ml, P = 0.004]. Receiver operating characteristic curve analysis showed that the baseline quantitative HBsAg and the reduction in quantitative HBsAg and serum RANTES during the early period were predictors of HBsAg clearance after 48-week combination therapy. Furthermore, the combination of baseline quantitative HBsAg and 12 - or 24-week reduction of serum RANTES were better predictors of HBsAg clearance than that of baseline quantitative HBsAg combined with HBsAg decrease at week 12 or 24. The area under the receiver operating characteristic curve of the former was 0.925 and 0.939, while that of the latter was 0.909 and 0.929, respectively. Conclusion: Early reduction of serum RANTES at week 12 and 24 can predict HBsAg loss in CHB patients receiving addition of peginterferon-α to ongoing NAs Therapy, so serum RANTES could be one of the key immunological markers for predicting HBsAg clearance.
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Affiliation(s)
- R Jia
- Medical School of Chinese PLA, Beijing 100853, China Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - W X Wang
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China Peking University 302 Clinical Medical School, Beijing 100039, China
| | - Y Y Gao
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - J Q Luan
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - F Qiao
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - J Y Liu
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - J H Yuan
- Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China
| | - Y Q Cheng
- Department of Geriatric Medicine, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - F S Wang
- Medical School of Chinese PLA, Beijing 100853, China Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China Peking University 302 Clinical Medical School, Beijing 100039, China
| | - J L Fu
- Medical School of Chinese PLA, Beijing 100853, China Department of Infectious Diseases, The Fifth Medical Center of Chinese PLA General Hospital, National Clinical Research Center for Infectious Diseases, Beijing 100039, China Peking University 302 Clinical Medical School, Beijing 100039, China
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10
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Guenter R, Aweda T, Carmona Matos DM, Jang S, Whitt J, Cheng YQ, Liu XM, Chen H, Lapi SE, Jaskula-Sztul R. Corrigendum to: Overexpression of somatostatin receptor type 2 in neuroendocrine tumors for improved Ga68-DOTATATE imaging and treatment [Surgery. 2020 Jan;167(1):189-196. doi: 10.1016/j.surg.2019.05.092. Epub 2019 Oct 16.PMID: 31629542]. Surgery 2021; 170:351. [PMID: 33875251 PMCID: PMC10166185 DOI: 10.1016/j.surg.2021.03.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- R Guenter
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL
| | - T Aweda
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL
| | - D M Carmona Matos
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL; San Juan Bautista School of Medicine, Caguas, PR
| | - S Jang
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL
| | - J Whitt
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL
| | - Y Q Cheng
- Department of Pharmaceutical Sciences, University of North Texas Health Science Center, Fort Worth, TX
| | - X M Liu
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL
| | - H Chen
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL
| | - S E Lapi
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL
| | - R Jaskula-Sztul
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL.
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11
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Yu YF, Zhou XL, Wang GF, Gu WX, Cheng YQ. [Clinicopathological analysis of micropapillary urothelial carcinoma of the bladder]. Zhonghua Bing Li Xue Za Zhi 2021; 50:125-127. [PMID: 33535307 DOI: 10.3760/cma.j.cn112151-20200529-00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Y F Yu
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - X L Zhou
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - G F Wang
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - W X Gu
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
| | - Y Q Cheng
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
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12
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Cheng YQ, Kolesnikov AI, Ramirez-Cuesta AJ. Simulation of Inelastic Neutron Scattering Spectra Directly from Molecular Dynamics Trajectories. J Chem Theory Comput 2020; 16:7702-7708. [PMID: 33156633 DOI: 10.1021/acs.jctc.0c00937] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Inelastic neutron scattering (INS) is a widely used technique to study atomic and molecular vibrations. With the increasing complexity of materials and thus the INS spectra, being able to simulate the spectra from various atomistic models becomes an essential step and also a major bottleneck for INS data analysis. The conventional approach using density functional theory and lattice dynamics often falls short when the materials of interest are complex (e.g., defective, disordered, heterogeneous, amorphous, large-scale), for which molecular dynamics driven by an interatomic force field is a more common approach. In this paper, we demonstrate a method to directly convert molecular dynamics trajectories into simulated INS spectra, including not only fundamental but also higher order excitations. The results are compared with data collected on various representative samples from different neutron spectrometers. This development will open great opportunities by providing the key tool to perform in-depth analysis of INS data and to validate and optimize computer models.
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Affiliation(s)
- Y Q Cheng
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - A I Kolesnikov
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - A J Ramirez-Cuesta
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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13
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Abstract
The thermal neutron scattering cross-section of a solid depends on the energy (or wavelength) of the incident neutrons. Devising a method to calculate the energy dependence from first principles, without the approximations built in the scattering theory, has been a major undertaking in nuclear engineering. Here, we demonstrate such a calculation method using the program OCLIMAX. Our approach eliminates various approximations and limitations involved in a regular calculation with the LEAPR module of NJOY code, and the results are compared with available experimental and theoretical data. It is also demonstrated how additional insight can be obtained from the calculated full dynamical structure factor. The results reported here show the great potential and excellent platform provided by OCLIMAX for future development in the study of neutron thermalization in solid materials for different applications.
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Affiliation(s)
- Y Q Cheng
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - A J Ramirez-Cuesta
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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14
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Wang GF, Zhou XL, Gu WX, Gao W, Cheng YQ. [Pulmonary nocardiosis caused by Nocardia otitidiscaviarum: report of a case]. Zhonghua Bing Li Xue Za Zhi 2019; 48:726-727. [PMID: 31495097 DOI: 10.3760/cma.j.issn.0529-5807.2019.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- G F Wang
- Department of Pathology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213003, China
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15
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Sun YY, Zhou XL, Gao W, Cheng YQ. [Clinicopathological Observation of Primary Renal Non-Hodgkin's Lymphoma--A Report of Two Cases]. Zhongguo Shi Yan Xue Ye Xue Za Zhi 2019; 27:86-90. [PMID: 30738452 DOI: 10.7534/j.issn.1009-2137.2019.01.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To investigate the clinicopathological and immunohistochemical features as well as diagnosis, differential diagnosis,treatment and prognosis of patients with primary renal non-hodgkin's lymphoma (PRNHL). METHODS Clinical data of 2 patients with PRNHL from January 2013 to October 2017 were retrospectively analyzed. RESULTS One of the two male patients PRNHL aged 51 years old, admitted to hospital for swelling and pain in the right waist, B-ultra sonic examination showed a very solid upper right renal space occupying lesion. CT showed the soft tissue mass of the right kidney about 10.5 cmx 8.6 cm. Preoperative diagnosis was a right kidney cancer subjected to radical surgery, and the postoperative pathological diagnosis was a right renal diffuse large B cell lymphoma (DLBCL). Expression of CD20, CD79a, Mum-1, BCL-2, BCL-6 in tumor cells was identified by inmmunohistochemistry, and Ki-67 proliferation index was 90%. Six courses of chemotherapy with R-CHOPE regimen were carried out supplemented local radiotherapy. The patients were followed up for 32 months, which were generally in good condition and stable. The another patient was 65 years old, no without obvious clinical symptoms, B-ultrasonic examination found a space occupying lesion in the left kidney. Abdomind CT scan plus enhancement showed the left kidneydisplayed uneven enhanced lesions of size 9 cm x 5 cm, the preoperative diagnosis was left kidney cancer, the pathological diagnosis was diagnosed as mall B cell lymphoma of the left kidney after the radical operation. Immunohistochemistry determined expression of CD20, CD79a, pax-5, BCL-2 in tumor cells and Ki-67 proliferation index 10%. 6 courses of chemotherapy with CHOPE regimen had been performed and followed up for 20 months, the conditions were generally good and stable. CONCLUSION PRNHL is a rare extranodal non-Hodgkin lymphoma with atypical clinical symptoms characterized by lumbar swelling pain. It is easy to be misdiagnosed as renal cell carcinoma before operation. The diagnosis depends on pathology and immunohisto-chemistry. The prognosis of 2 patients was relatively good. PRNHL should be differetiated with renal sarcomatoid cancer, nephroblastoma and other diseases. Surgical resection plus chemotherapy is recommended.
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Affiliation(s)
- Yang-Yang Sun
- Department of Pathology, The Changzhou Municipal Second People's Hospital, Affiliated to Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Xiao-Li Zhou
- Department of Pathology, The Changzhou Municipal Second People's Hospital, Affiliated to Nanjing Medical University, Changzhou 213000, Jiangsu Province, China.E-mail:
| | - Wei Gao
- Department of Pathology, The Changzhou Municipal Second People's Hospital, Affiliated to Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Yu-Qing Cheng
- Department of Pathology, The Changzhou Municipal Second People's Hospital, Affiliated to Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
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16
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Liu JP, Cheng YQ, Zhang JM, Jin HM, Ning HB, Li K, Ma MY, Wu YN, Peng Z, Yin H, Liu CP, Shang J. [A real-world study of paritaprevir/ritonavir-ombitasvir combined with dasabuvir in the treatment of genotype 1b chronic hepatitis C]. Zhonghua Gan Zang Bing Za Zhi 2019; 26:927-932. [PMID: 30669786 DOI: 10.3760/cma.j.issn.1007-3418.2018.12.010] [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 recognize the efficacy and safety of paritaprevir/ritonavir-ombitasvir combined with dasabuvir (OBV/PTV/RTV+DSV) in the treatment of genotype 1b chronic hepatitis C. Methods: Patients with genotype 1b chronic hepatitis C who were admitted to the People's Hospital of Henan Province, Huashan Hospital of Shanghai and the Fifth Medical Center of the General Hospital of the People's Liberation Army of China between November 2017 to August 2018 were enlisted. All patients received OBV/PTV/RTV+DSV antiviral therapy. HCV RNA levels were measured at baseline, weeks 1, 2, 3, 4, 8, 12, and 24, then 12 weeks, and 24 weeks after completion of treatment; patients' comorbidity, concomitant medications, and clinical adverse events were recorded. Results: 108 patients were enrolled in the study, with an average age of 49.1 years, 44 patients were male (40.8%), 96.3% (104/108) were newly diagnosed, and four patients had previous treatment history, of whom three were treated with IFN and one with IFN + DAA. Ninety-eight cases completed 12 weeks treatment and 89 cases were in follow up for 12 weeks, after discontinuation of the drug. Overall, 89 cases (100%) achieved SVR12.One patient treated with PR and DAA had HCV RNA level of 869175 IU/mL at 4 weeks of treatment, which was significantly higher than the baseline HCV RNA level (301776IU/ML), and was judged as failure of treatment; and follow-up was discontinued. Of all enrolled patients, 19 (17.6%) had underlying diseases and 15 (13.9%) had combined medications. During treatment, adverse events (AE) occurred in 11 patients (10.1%). The main adverse events were pruritus and elevated bilirubin. Conclusion: Combined antiviral therapy (OBV/PTV/RTV+DSV) of 12 weeks are highly effective with good safety profile in the treatment of Chinese patients with genotype 1b chronic hepatitis C.
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Affiliation(s)
- J P Liu
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - Y Q Cheng
- The Fifth Medical Center of the General Hospital of the Chinese people's Liberation Army, BeiJing, 100039, China
| | - J M Zhang
- Department of Infectious Diseases, Huashan Hospital Affiliated to Fudan University, Shanghai, 200040, China
| | - H M Jin
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - H B Ning
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - K Li
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - M Y Ma
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - Y N Wu
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - Z Peng
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - H Yin
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - C P Liu
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
| | - J Shang
- Department of Infectious Diseases, Henan Provincial People's Hospital, zhengzhou 450003, China
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17
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Gillis RC, Cheng YQ, Gallmeier FX, Hartl MA, Huegle T, Iverson EB. A sample holder for simultaneous Raman and neutron vibrational spectroscopy. Rev Sci Instrum 2018; 89:013112. [PMID: 29390719 DOI: 10.1063/1.4997933] [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] [Indexed: 06/07/2023]
Abstract
We have built a sample holder (called a center stick or sample stick) for performing simultaneous Raman and neutron vibrational spectroscopy on samples of material at the VISION neutron vibrational spectrometer of the Spallation Neutron Source at Oak Ridge National Laboratory. This equipment holds material samples in the neutron beam within the cryogenic environment of the VISION spectrometer, allowing for samples to be studied at temperatures as low as 5 K. It also provides the capability for gas to be loaded to or evacuated from the sample while it is loaded at VISION. The optical components for directing and filtering light are located within the cryogenic volume, in physical proximity to the sample. We describe the construction of this sample holder and discuss our first measurements of simultaneous Raman and neutron vibrational spectra. The samples that we report on were of 4-nitrophenol at a temperature of 20 K and of cryogenic hydrogen of a number of different orthohydrogen fractions.
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Affiliation(s)
- R C Gillis
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Y Q Cheng
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - F X Gallmeier
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M A Hartl
- European Spallation Source ERIC, Box 176, S-221 00 Lund, Sweden
| | - T Huegle
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E B Iverson
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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18
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Cheng YQ, Chen J, Huang Q. [Comments on the TNM classification for the Vater ampullary cancer in the Cancer Staging Manual (eighth edition) of American Joint Committee on Cancer]. Zhonghua Bing Li Xue Za Zhi 2017; 46:596-600. [PMID: 28910868 DOI: 10.3760/cma.j.issn.0529-5807.2017.09.002] [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: 06/07/2023]
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19
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Whitfield PS, Herron N, Guise WE, Page K, Cheng YQ, Milas I, Crawford MK. Corrigendum: Structures, Phase Transitions and Tricritical Behavior of the Hybrid Perovskite Methyl Ammonium Lead Iodide. Sci Rep 2017; 7:42831. [PMID: 28220808 PMCID: PMC5318896 DOI: 10.1038/srep42831] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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20
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Tao H, Liu HJ, Cheng YQ, Sima YH, Yin WM, Xu SQ. Parental environmental exposure leads to glycometabolic disturbances that affect fertilization of eggs in the silkworm Bombyx mori: the parental transcript legacy. J Comp Physiol B 2014; 185:47-55. [PMID: 25240789 DOI: 10.1007/s00360-014-0864-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/07/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
Abstract
Parental transcript legacy plays an important role in fertilization and development of the early embryo. Parental environmental exposure affects the fertilization of eggs, but the underlying biochemical mechanism is largely unresolved. In this study, the parental environmental effects on fertilization of eggs were explored in the silkworm Bombyx mori (B. mori), an ideal lepidopteran animal model. The results showed that the rate of fertilization decreased after the parents were exposed to a poor environment at 32 °C with continuous illumination for 72 h on days 6-9 of the pupal stage, which is a key period for germ cell maturation. This was likely attributable to lower energy charge values, obstructed nicotinamide adenine dinucleotide (NAD(+)) regeneration and inactive tricarboxylic acid cycle (TCA), leading to accumulation of large amounts of pyruvic acid and lactic acid. This effect was related to energy metabolism via glycolysis; in particular disruption of pyruvate metabolism. In conclusion, this study showed parental exposure to an abnormal environment during germ cell maturation affected glycolysis and the subsequent fertilization of eggs via the parental transcript legacy in B. mori.
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Affiliation(s)
- H Tao
- Department of Applied Biology, School of Biology and Basic Medical Sciences, Soochow University, Suzhou, 215123, China
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21
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Wang HW, Duan JM, Zhang P, Cheng YQ, Wu JW, Wang GZ. Microsatellite markers in Paulownia kawakamii (Scrophulariaceae) and cross-amplification in other Paulownia species. Genet Mol Res 2013; 12:3750-4. [PMID: 24085436 DOI: 10.4238/2013.september.19.6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Paulownia kawakamii is a fast-growing timber tree. In this study, 21 primer sets were developed using an enriched genomic library. The genetic diversity was measured in one P. kawakamii population. The number of alleles per locus ranged from 2 to 19. The observed and expected heterozygosities varied from 0.158 to 0.842 (mean = 0.421) and from 0.376 to 0.952 (mean = 0.771), respectively. All 21 loci were also polymorphic in closely related species (P. tomentosa, P. elongata, and P. fortunei). The described markers will be useful in future population genetic studies and molecular breeding of these Paulownia species.
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Affiliation(s)
- H W Wang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, China
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22
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Xu J, Cheng YQ, Chen B, Bai R, Li S, Xu XF, Xu L, Wen JF, Lu ZP, Zeng XF. Depression in systemic lupus erythematosus patients is associated with link-polymorphism but not methylation status of the 5HTT promoter region. Lupus 2013; 22:1001-10. [PMID: 23893825 DOI: 10.1177/0961203313498793] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A higher prevalence of depression in systemic lupus erythematosus (SLE) patients has been reported, though the mechanism underlying this phenomenon remains unclear. The present study was conducted to explore whether the polymorphism and methylation status of the serotonin transporter gene (5HTT) promoter region (PR-5HTT) contribute to depression in SLE patients from both genetic and epigenetic perspectives. In this study, 96 SLE patients and 96 healthy controls (HCs) were recruited. Depression levels of all subjects were evaluated using the Hamilton Depression Rating Scale (HDRS). The serotonin transporter-linked polymorphism (5HTTLPR) and the DNA methylation status of PR-5HTT were detected in peripheral lymphocytes of SLE patients and HCs. The differences in 5HTTLPR and DNA methylation of PR-5HTT between SLEs and HCs were compared. In SLE patients, the frequencies of short allele (S) and SS genotype of 5HTTLPR were higher in depressive SLE (SLE-D) patients than in non-depressive SLE (SLE-ND) patients. The mean HDRS score of SS homozygote patients was higher than that of patients with SL/LL genotypes. Conversely, PR-5HTT was hypomethylated in HCs as well as SLE patients. There was no difference in the methylation status between HCs and SLEs. Thus, the functional expression of PR-5HTT may be primarily regulated by gene polymorphism and not by DNA methylation. The risk allele of 5HTTLPR appears to be a major contributor to depression in SLE patients.
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Affiliation(s)
- J Xu
- Department of Rheumatology and Immunology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, PR China
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - YQ Cheng
- Department of Psychiatry, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - B Chen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China
| | - R Bai
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - S Li
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - XF Xu
- Department of Psychiatry, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - L Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China
| | - JF Wen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China
| | - ZP Lu
- Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, PR China
| | - XF Zeng
- Department of Rheumatology and Immunology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, PR China
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Cadien A, Hu QY, Meng Y, Cheng YQ, Chen MW, Shu JF, Mao HK, Sheng HW. First-order liquid-liquid phase transition in cerium. Phys Rev Lett 2013; 110:125503. [PMID: 25166820 DOI: 10.1103/physrevlett.110.125503] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Indexed: 06/03/2023]
Abstract
We report the first experimental observation of a liquid-liquid phase transition in the monatomic liquid metal cerium, by means of in situ high-pressure high-temperature x-ray diffraction experiments. At 13 GPa, upon increasing temperature from 1550 to 1900 K high-density liquid transforms to a low-density liquid, with a density difference of 14%. Theoretic models based on ab initio calculations are built to investigate the observed phase behavior of the liquids at various pressures. The results suggest that the transition primarily originates from the delocalization of f electrons and is deemed to be of the first order that terminates at a critical point.
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Affiliation(s)
- A Cadien
- School of Physics, Astronomy and Computational Sciences, George Mason University, Fairfax, Virginia 22030, USA
| | - Q Y Hu
- School of Physics, Astronomy and Computational Sciences, George Mason University, Fairfax, Virginia 22030, USA
| | - Y Meng
- High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Y Q Cheng
- Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M W Chen
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - J F Shu
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA
| | - H K Mao
- High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA and Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA
| | - H W Sheng
- School of Physics, Astronomy and Computational Sciences, George Mason University, Fairfax, Virginia 22030, USA and Center for Computational Materials Science, George Mason University, Fairfax, Virginia 22030, USA
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Jiao PR, Wei LM, Cheng YQ, Yuan RY, Han F, Liang J, Liu WL, Ren T, Xin CA, Liao M. Molecular cloning, characterization, and expression analysis of the Muscovy duck Toll-like receptor 3 (MdTLR3) gene. Poult Sci 2012; 91:2475-81. [PMID: 22991530 DOI: 10.3382/ps.2012-02394] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Toll-like receptor 3 (TLR3) is an important membrane-bound receptor for recognizing double-stranded RNA in innate immunity. In this study, we described the cloning and characterization of the Muscovy duck TLR3 (MdTLR3) gene. The full-length MdTLR3 cDNA (2,836 bp) encoded a polypeptide of 895 amino acids. The deduced amino acid sequence contained 4 main structural domains: a signal peptide, an extracellular leucine rich repeats domain, a transmembrane domain, and a Toll/IL-1 receptor domain. Quantitative real-time PCR analysis indicated that MdTLR3 mRNA was constitutively expressed in all sampled tissues of uninfected Muscovy duck except muscle. Expression of MdTLR3 in brain was significantly upregulated at 24 h (1.94-fold, P < 0.05), reached a peak at 48 h (4.64-fold, P < 0.05), and recovered to normal levels at 72 h postinfection with the H5N1 highly pathogenic avian influenza virus. In contrast, MdTLR3 expression was downregulated during the test period in spleen and lung. These results implicated MdTLR3 was a novel member of the TLR family, which is involved in the early stage of antiviral innate immunity.
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Affiliation(s)
- P R Jiao
- South China Agricultural University, Guangzhou, People's Republic of China
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25
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Wang XH, Liu BR, Qu B, Xing H, Gao SL, Yin JM, Wang XF, Cheng YQ. Silencing STAT3 may inhibit cell growth through regulating signaling pathway, telomerase, cell cycle, apoptosis and angiogenesis in hepatocellular carcinoma: potential uses for gene therapy. Neoplasma 2011; 58:158-71. [PMID: 21275467 DOI: 10.4149/neo_2011_02_158] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED The genesis and development of hepatocellular carcinoma (HCC) is related to the abnormity of signaling pathway, telomerase, cell cycle, apoptosis, angiogenesis, and others, in which STAT3 signaling pathway plays a key role. The HCC cell line HepG2 was transfected with small interfering RNA (siRNA) directed against STAT3. After 72 h, cell growth and cycle were analysed by MTT and Flow cytometry. Then, the protein was extracted and the protein expression of STAT3, Smad3, p44/42, TERT, caspase-3, XIAP, Grp-78, HSP-27, MMP-2, MMP-9, VEGF-A, cyclin A, and cyclin E was detected by Western blot. After the transfection, HCC cell growth was inhibited during the 24-72 h time period and the cell cycle was arrested in G0/G1. STAT3 protein expression was inhibited at 72 h after the transfection. Interestingly, Smad3, p-caspase-3, p-p44/42, Grp78, cyclin A, and cyclin E protein expression was increased at 72 h, while TERT, caspase-3, XIAP, MMP-2, MMP-9, and VEGF-A protein expression decreased at 72 h. However, P44/42, and HSP27 protein expression showed no change following transfection. The results demonstrated that STAT3 signaling pathway may participate in HCC genesis and development through regulating the protein expression of other signaling pathway, telomerase, apoptosis, cell cycle and angiogenesis; thereby, blockade of the Stat3 pathway represents a potential strategy for future treatment. KEYWORDS STAT3, signaling pathway, telomerase, cell cycle, apoptosis, angiogenesis.
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Affiliation(s)
- X H Wang
- Department of Gastroemterology, The Second Affiliated of Harbin Medical University, Harbin, HeiLongJiang Province, China
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Xu J, Zhang GL, Cheng YQ, Chen B, Dong Y, Li LQ, Xu L, Xu XF, Lu ZP, Wen JF. Hypomethylation of the HTR1A promoter region and high expression of HTR1A in the peripheral blood lymphocytes of patients with systemic lupus erythematosus. Lupus 2011; 20:678-89. [DOI: 10.1177/0961203310394892] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- J Xu
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan, PR China
| | - GL Zhang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China and Graduate School of Chinese Academy of Sciences, Beijing, PR China
| | - YQ Cheng
- Department of Psychiatry, The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan, PR China
- Key Laboratory of Animal Models and Human Disease Mechanisms, Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan, PR China and Graduate School of Chinese Academy of Sciences, Beijing, PR China
| | - B Chen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China and Graduate School of Chinese Academy of Sciences, Beijing, PR China
| | - Y Dong
- Department of Psychiatry, The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan, PR China
| | - LQ Li
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan, PR China
| | - L Xu
- Key Laboratory of Animal Models and Human Disease Mechanisms, Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan, PR China and Graduate School of Chinese Academy of Sciences, Beijing, PR China
- Mental Health Institute, the 2nd Hospital of Xiangya Medical College, Central South University, Changsha, PR China
| | - XF Xu
- Department of Psychiatry, The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan, PR China
| | - ZP Lu
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan, PR China
| | - JF Wen
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, PR China and Graduate School of Chinese Academy of Sciences, Beijing, PR China
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27
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Liu JF, Cheng YQ. First Report of Root Rot on Rhodiola sachalinensis Caused by Fusarium verticillioides (Gibberella fujikuroi) in China. Plant Dis 2011; 95:222. [PMID: 30743426 DOI: 10.1094/pdis-08-10-0582] [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] [Indexed: 06/09/2023]
Abstract
Rhodiola sachalinensis (family Crassulaceae), a perennial herbaceous plant with adaptogenic properties, cardiopulmonary protective effects, and central nervous system activities, is widely used as a traditional Chinese medicine (3). R. sachalinensis naturally exists only above 1,500 m elevation in the mountain area of Changbai Mountain (average July temperature ≤10°C), China. Introduction and cultivation of R. sachalinensis has been carried out in several low-altitude districts of northeast China. From 2007 to 2010, severe root rot disease was observed on R. sachalinensis in Siping districts, Jilin, China. Approximately 75 to 95% of the fields were affected with root rot disease incidence ranging from 85 to 100% under conditions of high temperatures (24 to 30°C) and high humidity. As the disease progressed, brown lesions expanded on lateral and main roots, and aboveground tissues shriveled and died. Over the 4- to 5-year period from culture to harvest, root rot became more serious. Symptomatic plants were collected from Siping districts. Samples were rinsed in tap water, necrotic areas were excised and cut into 2-mm pieces, surface sterilized with 5% NaOCl for 30 s, and rinsed in four successive changes of sterile distilled water. A single fungus was isolated on potato dextrose agar (PDA). The fungus was white, then pink and cottony, with nearly round margins after 8 days (27°C). Hyphae were separate and hyaline but macroconidia were sparse and occurred in a false head. Conidiogenous cells were monophialides. Microconidia in chains were abundant and mostly nonseptate, oval to clavate, and measured 8.1 to 14.5 × 2.0 to 3.4 μm. Morphological characteristics suggested the isolate was Fusarium verticillioides (Gibberella fujikuroi), which differed from the reported root rot pathogen of R. sachalinensis, F. oxysporum by forming microconidia in chains (1). The sexual stage of F. verticillioides was not observed. The internal transcribed spacer (ITS) fragments were amplified using ITS1 and ITS4 as primers and the 351-bp sequence was deposited in GenBank (Accession No. HQ025928). The ITS sequence showed 100% nucleotide sequence identity with F. verticillioides (GenBank Accession No. AY188916.1.). For pathogenicity tests, the isolate was cultured on PDA for 8 days. Inoculations were performed on 15 healthy R. sachalinensis plants by spraying a conidial suspension (2.0 × 105 microconidia ml-1) on roots wounded with a metal needle (6 wounds cm-2) (2). Ten plants were mock inoculated with water. Plants were incubated in a growth chamber (25°C, 70 to 80% relative humidity, 300 μmol·m-2·s-1 light intensity, and a 12-h photoperiod). After 15 days, defoliation and root rot symptoms were similar to the original symptoms observed under field conditions. F. verticillioides was reisolated from the roots of infected plants. Control plants remained asymptomatic. To our knowledge, this is the first report of F. verticillioides on R. sachalinensis in China. References: (1) X. Y. Li et al. J. Northeast For. Univ. 34:12, 2003. (2) M. Ma. Syahit et al. Am. J. Appl. Sci. 6:902, 2009. (3) T. F. Yan et al. Conserv. Genet. 4:213, 2003.
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Affiliation(s)
- J F Liu
- College of Life Sciences, Jilin Normal University, Jilin, 136000, China
| | - Y Q Cheng
- College of Life Sciences, Jilin Normal University, Jilin, 136000, China
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Liu XQ, Li XB, Zhang L, Cheng YQ, Yan ZG, Xu M, Han XD, Zhang SB, Zhang Z, Ma E. New structural picture of the Ge2Sb2Te5 phase-change alloy. Phys Rev Lett 2011; 106:025501. [PMID: 21405239 DOI: 10.1103/physrevlett.106.025501] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Indexed: 05/30/2023]
Abstract
Using electron microscopy and diffraction techniques, as well as first-principles calculations, we demonstrate that as much as 35% of the total Ge atoms in the cubic phase of Ge2Sb2Te5 locate in tetrahedral environments. The Ge-vacancy interactions play a crucial stabilizing role, leading to Ge-vacancy pairs and the sharing of vacancies that clusters tetrahedral Ge into domains. The Ge2Sb2Te5 structure with coexisting octahedral and tetrahedral Ge produces optical and structural properties in good agreement with experimental data and explains the property contrast as well as the rapid transformation in this phase-change alloy.
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Affiliation(s)
- X Q Liu
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100022, China
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29
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Chen XH, Xiang HY, Wang Z, Zhang YJ, Han CG, Li DW, Yu JL, Cheng YQ. Studies on interaction of cucurbit aphid-borne yellow virus proteins using yeast two-hybrid system and bimolecular fluorescence complementation. Acta Virol 2011; 55:235-41. [PMID: 21978157 DOI: 10.4149/av_2011_03_235] [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] [Indexed: 11/08/2022]
Abstract
In this article, yeast two-hybrid system (YTHS) and bimolecular fluorescence complementation (BiFC) were used to analyze the interactions of cucurbit aphid-borne yellows virus (CABYV)-encoded proteins. P0, P1, P1-2, P3, P4, and P5 were tested by YTHS in all possible pairwise combinations, and only P3/P3 interaction was detected. Results obtained by BiFC further confirmed the self-interaction of P3, and the subcellular localization of reconstituted YFP fluorescence was observed mainly in nuclei of Nicotiana benthamiana leaf epidermal cells. Domains involved in P3/P3 self-interaction were analyzed by YTHS and BiFC using deletion mutants. The results showed that R domain (residues 1-61) in the N-terminus could self-interact, and it also interacted with the S domain (residues 62-199) in the C-terminus of P3. The present work would serve as a molecular basis for further characterization of CABYV proteins, and the regions involved in P3/P3 self-interaction could provide the clue for understanding the capsid assembly pathway of CABYV.
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Affiliation(s)
- X H Chen
- China Agricultural University, Beijing, People's Republic of China
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30
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Xu M, Cheng YQ, Sheng HW, Ma E. Nature of atomic bonding and atomic structure in the phase-change Ge2Sb2Te5 glass. Phys Rev Lett 2009; 103:195502. [PMID: 20365937 DOI: 10.1103/physrevlett.103.195502] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2009] [Indexed: 05/29/2023]
Abstract
Using electronic structure calculations, we demonstrate a global valence alternation in the amorphous Ge2Sb2Te5, a prototype phase-change alloy for data storage. The resulting p bonding profoundly influences the local atomic structure, leading to right-angle components similar to those in the crystalline counterpart of this chalcogenide glass. The dominance of p bonding is revealed by (i) distributions of the coordination number (CN) and the bond angle, for truly bonded atoms determined based on the electron localization function, and (ii) a direct evaluation of the p (and s) orbital occupation probability for the CN=3 Ge atoms that form 90 degree bonds with neighbors.
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Affiliation(s)
- M Xu
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA.
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31
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Abstract
The atomic-level structure of a representative ternary Cu-Zr-Al bulk metallic glass (BMG) has been resolved. Cu- (and Al-) centered icosahedral clusters are identified as the basic local structural motifs. Compared with the Cu-Zr base binary, a small percentage of Al in the ternary BMG leads to dramatically increased population of full icosahedra and their spatial connectivity. The stabilizing effect of Al is not merely topological, but also has its origin in the electronic interactions and bond shortening.
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Affiliation(s)
- Y Q Cheng
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
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32
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Sheng HW, Liu HZ, Cheng YQ, Wen J, Lee PL, Luo WK, Shastri SD, Ma E. Polyamorphism in a metallic glass. Nat Mater 2007; 6:192-7. [PMID: 17310140 DOI: 10.1038/nmat1839] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Accepted: 12/19/2006] [Indexed: 05/14/2023]
Abstract
A metal, or an alloy, can often exist in more than one crystal structure. The face-centred-cubic and body-centred-cubic forms of iron (or steel) are a familiar example of such polymorphism. When metallic materials are made in the amorphous form, is a parallel 'polyamorphism' possible? So far, polyamorphic phase transitions in the glassy state have been observed only in glasses involving directional and open (such as tetrahedral) coordination environments. Here, we report an in situ X-ray diffraction observation of a pressure-induced transition between two distinct amorphous polymorphs in a Ce(55)Al(45) metallic glass. The large density difference observed between the two polyamorphs is attributed to their different electronic and atomic structures, in particular the bond shortening revealed by ab initio modelling of the effects of f-electron delocalization. This discovery offers a new perspective of the amorphous state of metals, and has implications for understanding the structure, evolution and properties of metallic glasses and related liquids. Our work also opens a new avenue towards technologically useful amorphous alloys that are compositionally identical but with different thermodynamic, functional and rheological properties due to different bonding and structural characteristics.
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Affiliation(s)
- H W Sheng
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
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Nie QH, Cheng YQ, Xie YM, Zhou YX, Cao YZ. Inhibiting effect of antisense oligonucleotides phosphorthioate on gene expression of TIMP-1 in rat liver fibrosis. World J Gastroenterol 2001; 7:363-9. [PMID: 11819791 PMCID: PMC4688723 DOI: 10.3748/wjg.v7.i3.363] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2001] [Revised: 02/03/2001] [Accepted: 02/12/2001] [Indexed: 02/06/2023] Open
Abstract
AIM To observe the inhibition of antisense oligonucleotides (asON) phosphorthioate to the tissue inhibitors metalloproteinase-1 (TIMP-1) gene and protein expression in the liver tissue of immunologically induced hepatic fibrosis rats. The possibility of reversing hepatic fibrosis through gene therapy was observed. METHODS Human serum albumin (HSA) was used to attack rats, as hepatic fibrosis model, in which asONs were used to block the gene and protein expressing TIMP-1. According to the analysis of modulator, structure protein, coding series of TIMP-1 genome, we designed four different asONs. These asONs were injected into the hepatic fibrosis models through coccygeal vein. The results was observed by RT-PCR for measuring TIMP-1 mRNA expression, immunohistochemistry and in situ hybridization for collagen I, II, special staining of collagen fiber, and electron microscopic examination. RESULTS Hepatic fibrosis could last within 363 days in our modified model. The expressing level of TIMP-1 was high during hepatic fibrosis process. It has been proved by the immunohistochemical and the electron microscopic examination that the asON phosphorthioate of TIMP-1 could exactly express in vivo. The effect of colchicine was demonstrated to inhibit the expressing level of mRNA and the content of collagen I, III in the liver of experimental hepatic fibrosis rats. However, the electron microscopy research and the pathologic grading of hepatic fibrosis showed that there was no significant difference between the treatment group and the model group (P> 0.05). CONCLUSION The experimental rat model of hepatic fibrosis is one of the preferable models to estimate the curative effect of anti-hepatic fibrosis drugs. The asON phosphorthioate of TIMP-1 could block the gene and protein expression of TIMP-1 in the liver of experimental hepatic fibrosis rats at the mRNA level. It is possible to reverse hepatic fibrosis, and it is expected to study a new drug of antihepatic fibrosis on the genetic level. Colchicine has very limited therapeutic effect on hepatic fibrosis, furthermore, its toxicity and side effects are obvious.
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Affiliation(s)
- Q H Nie
- The Center of Infectious Disease Diagnosis and Treatment of PLA, Tangdu Hospital, Forth Military Medical University, Xi'an 710038, Shaanxi Province, China.
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Abstract
The cyclic tetrapeptide HC-toxin is an essential virulence determinant for the plant pathogenic fungus Cochliobolus carbonum and an inhibitor of histone deacetylase. The major form of HC-toxin contains the D-isomers of Ala and Pro. The non-ribosomal peptide synthetase that synthesizes HC-toxin has only one epimerizing domain for conversion of L-Pro to D-Pro; the source of D-Ala has remained unknown. Here we present the cloning and characterization of a new gene involved in HC-toxin biosynthesis, TOXG. TOXG is present only in HC-toxin-producing (Tox2(+)) isolates of C. carbonum. TOXG is able to support D-Ala-independent growth of a strain of Escherichia coli defective in D-Ala synthesis. A C. carbonum strain with both of its copies of TOXG mutated grows normally in culture, and although it no longer makes the three forms of HC-toxin that contain D-Ala, it still makes a minor form of HC-toxin that contains Gly in place of D-Ala. The addition of D-Ala to the culture medium restores production of the D-Ala-containing forms of HC-toxin by the toxG mutant. The toxG mutant has only partially reduced virulence. It is concluded that TOXG encodes an alanine racemase whose function is to synthesize D-Ala for incorporation into HC-toxin.
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Affiliation(s)
- Y Q Cheng
- Department of Energy Plant Research Laboratory and Department of Botany and Plant Pathology, Michigan State University, East Lansing, Michigan 28824, USA
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35
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Cheng YQ, Le LD, Walton JD, Bishop KD. 13C labeling indicates that the epoxide-containing amino acid of HC-toxin is biosynthesized by head-to-tail condensation of acetate. J Nat Prod 1999; 62:143-145. [PMID: 9917303 DOI: 10.1021/np980209e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
HC-toxin, cyclo(D-Pro-L-Ala-D-Ala-L-Aeo), where Aeo stands for 2-amino-9,10-epoxi-8-oxodecanoic acid, is a potent inhibitor of histone deacetylase. Previous molecular genetic studies indicated that HC-toxin biosynthesis requires a dedicated fatty acid synthase. The incorporation of [13C]acetate into HC-toxin was studied using NMR. The pattern of incorporation of 13C was consistent with the carbons of Aeo being derived from head-to-tail condensation of acetate.
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Affiliation(s)
- Y Q Cheng
- Department of Energy-Plant Research Laboratory and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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36
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Cheng YQ, Wang SW. [The cell messenger roles of the endogenous carbon monoxide in the cardiovascular system]. Sheng Li Ke Xue Jin Zhan 1998; 29:145-7. [PMID: 12501683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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37
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Scott-Craig JS, Cheng YQ, Cervone F, De Lorenzo G, Pitkin JW, Walton JD. Targeted mutants of Cochliobolus carbonum lacking the two major extracellular polygalacturonases. Appl Environ Microbiol 1998; 64:1497-503. [PMID: 9546185 PMCID: PMC106176 DOI: 10.1128/aem.64.4.1497-1503.1998] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The filamentous fungus Cochliobolus carbonum produces endo-alpha 1,4-polygalacturonase (endoPG), exo-alpha 1,4-polygalacturonase (exoPG), and pectin methylesterase when grown in culture on pectin. Residual activity in a pgn1 mutant (lacking endoPG) was due to exoPG activity, and the responsible protein has now been purified. After chemical deglycosylation, the molecular mass of the purified protein decreased from greater than 60 to 45 kDa. The gene that encodes exoPG, PGX1, was isolated with PCR primers based on peptide sequences from the protein. The product of PGX1, Pgx1p, has a predicted molecular mass of 48 kDa, 12 potential N-glycosylation sites, and 61% amino acid identity to an exoPG from the saprophytic fungus Aspergillus tubingensis. Strains of C. carbonum mutated in PGX1 were constructed by targeted gene disruption and by gene replacement. Growth of pgx1 mutant strains on pectin was reduced by ca. 20%, and they were still pathogenic on maize. A double pgn1/pgx1 mutant strain was constructed by crossing. The double mutant grew as well as the pgx1 single mutant on pectin and was still pathogenic despite having less than 1% of total wild-type PG activity. Double mutants retained a small amount of PG activity with the same cation-exchange retention time as Pgn1p and also pectin methylesterase and a PG activity associated with the mycelium. Continued growth of the pgn1/pgx1 mutant on pectin could be due to one or more of these residual activities.
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Affiliation(s)
- J S Scott-Craig
- Department of Energy Plant Research Laboratory, Michigan State University, East Lansing 48824, USA
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38
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Zhang Y, Zhang YL, Cheng YQ. [Clinical observation of constipation due to deficiency of vital energy treated by massage and finger pressure methods]. Zhonghua Hu Li Za Zhi 1996; 31:97-8. [PMID: 8716759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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39
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Cheng YQ, Shi DR. [Clinical analysis of the effects of a combined therapy with Vernonia anthelmintica and others on 329 cases of vitiligo]. Zhong Xi Yi Jie He Za Zhi 1987; 7:350-1, 325. [PMID: 3690757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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40
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Zhang JM, Cheng YQ. [Effect of electro-stimulation of central ends of cervical vagi on the release of catecholamine from the adrenal medulla in rats]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1986; 8:125-7. [PMID: 2944641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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41
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Lee LF, Silva RF, Cheng YQ, Smith EJ, Crittenden LB. Characterization of monoclonal antibodies to avian leukosis viruses. Avian Dis 1986; 30:132-8. [PMID: 3015099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Hybridoma cell lines secreting monoclonal antibody (MCA) to avian leukosis virus (ALV) structural proteins p27 and p19 have been established. In an indirect enzyme-linked immunosorbent assay (ELISA), MCA 6AL20 (IgG1 isotype) reacted with RPL-40 (ALV subgroup A), avian myeloblastosis virus (AMV) (a mixture of subgroups A and B), Rous-associated virus (RAV)-2 (subgroup B), and Carr-Zilber strain of Rous sarcoma virus (CZ-RSV) (subgroup D) but not with Prague strain of RSV (PrC-RSV) (subgroup C) or the endogenous virus RAV-0 (subgroup E). MCA 6AL22 reacted as above and also reacted marginally with PrC-RSV. Both MCAs immunoprecipitated p19 from 35S-methionine-labeled chicken embryo fibroblasts (CEFs) infected with RPL-40 or RAV-1, but not from CEFs infected with RAV-0, thus identifying the viral structural protein p19 as a polypeptide with subgroup-specific epitopes. Both MCAs can be used to differentiate RPL-40 from RAV-0 infection either in an indirect antibody ELISA or by immunoprecipitation. A third MCA, 6AL42 (IgG2a isotype), reacted with the above viruses of subgroups A, B, C, and D at an antibody titer up to 1000-fold higher than with subgroup E RAV-0 virus in indirect ELISAs. MCA 6AL42 immunoprecipitated p27 from cells infected with RPL-40, RAV-1, or RAV-0. These MCAs are potentially useful in developing immunological tests for differentiation of ALV strains.
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Cheng YQ, Lee LF, Smith EJ, Witter RL. An enzyme-linked immunosorbent assay for the detection of antibodies to Marek's disease virus. Avian Dis 1984; 28:900-11. [PMID: 6098254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A reproducible enzyme-linked immunosorbent assay (ELISA) using Marek's disease virus (MDV)-infected cells for the detection of antibodies to MDV is described. The optimum number of MDV-infected chicken embryo fibroblasts (CEF) was 5 X 10(4)/well, and test sera were positive at 1:400 dilutions. Compared with a purified virus preparation, MDV-infected CEF produced high specific and low nonspecific reactivities. Wells coated with whole cells could be stored at 4 C or -20 C for at least 3 months without loss of reactivity. With antibody-negative sera, the cutoff absorbency was 0.20 units. The ELISA was 20-to-40-fold more sensitive than indirect immunofluorescence. Homologous combinations of antisera in wells coated with CEF infected with different MDV serotypes were more reactive at higher dilutions than were heterologous combinations. The procedure described is specific and suitable for large-scale screening of both chicken and monoclonal antibodies against MDV.
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Cheng YQ, Wang ZQ, Zhang SY, Wu JJ, Wu WY. The use of needling Zusanli in fiberoptic gastroscopy. J TRADIT CHIN MED 1984; 4:91-2. [PMID: 6567732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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