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Zhang YF, Hu MW, Guo CC, Yang X, Wang YZ, Xiang S, Xu H. [Clinical efficacy of intraarticular vancomycin in preventing early periprosthetic joint infection after primary knee arthroplasty]. Zhonghua Wai Ke Za Zhi 2024; 62:591-597. [PMID: 38682631 DOI: 10.3760/cma.j.cn112139-20231116-00224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Objective: To investigate the clinical effect of intraarticular vancomycin on early periprosthetic joint infection (PJI) in knee arthroplasty and the incidence of postoperative complications. Methods: This is a retrospective cohort study. The clinical data of 1 867 patients who underwent primary knee arthroplasty at Department of Joint Surgery, the Affiliated Hospital of Qingdao University from April 2022 to June 2023 were retrospectively analysed, including total knee arthroplasty (TKA), robotic-assisted total knee arthroplasty (RA-TKA) and unicondylar knee arthroplasty (UKA). There were 687 males and 1180 females, aged (68.0±11.2)years(range:45 to 87 years). Patients were divided into the vancomycin group and the control group according to whether or not intra-articular injection of 1 g of vancomycin powder dissolved in 30 ml of saline was performed after intraoperative joint capsule closure. In the vancomycin group, 925 patients were included, including 782 TKA, 27 RA-TKA and 116 UKA.In the control group, 942 patients were included, including 767 TKA, 99 RA-TKA and 76 UKA. Early PJI, wound complications, and vancomycin-related toxicity including acute renal collapse, ototoxicity, and allergic reactions were assessed within 3 months postoperatively. Results: No PJI was found in all patients in the vancomycin group.Five cases (0.7%,5/767) of early PJI were found in TKA patients in the control group, with a statistically significant difference (P=0.030); 1 case of early PJI was found in each RA-TKA and UKA patients, with non-significant difference compared with vancomycin group (all P>0.05). Two cases (0.3%,2/782) of incisional complications were found in TKA patients in the vancomycin group, and 4 cases (0.5%, 4/767) of incisional complications were found in TKA patients in the control group, with non-significant difference(P=0.449); no incisional complications were found in RA-TKA patients in the vancomycin group, and 1 case (1.0%,1/99) of incisional complications were found in RA-TKA patients in the control group, the difference was not statistically significant (P>0.05); no incisional complications were found in both groups of UKA patients.No vancomycin-related acute kidney injury, ototoxicity, or allergic reactions was observed in all patients. Conclusion: Intra-articular injection of 1 g of vancomycin suspension after arthrotomy closure during TKA maybe lower the risk of early PJI without increasing the risk of wound complication and vancomycin-associated systemic toxicity.
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Affiliation(s)
- Y F Zhang
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - M W Hu
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - C C Guo
- Department of Sports Medicine, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - X Yang
- Department of Operation Room, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Y Z Wang
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - S Xiang
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - H Xu
- Department of Joint Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266000, China
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Ren X, Deng D, Xiang S, Feng J. Promoter hypomethylated PDZK1 acts as a tumorigenic gene in glioma by interacting with AKT1. Aging (Albany NY) 2024; 16:7174-7187. [PMID: 38669103 PMCID: PMC11087087 DOI: 10.18632/aging.205750] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 03/25/2024] [Indexed: 04/28/2024]
Abstract
Glioma is the most frequently diagnosed primary brain tumor and typically has a poor prognosis because of malignant proliferation and invasion. It is urgent to elucidate the mechanisms driving glioma tumorigenesis and develop novel treatments to address this deadly disease. Here, we first revealed that PDZK1 is expressed at high levels in gliomas. Promoter hypomethylation may cause high expression of PDZK1 in glioma. Knockdown of PDZK1 inhibits glioma cell proliferation and invasion in vitro. Mechanistically, further investigations revealed that the loss of PDZK1 expression by siRNA inhibited the activation of the AKT/mTOR signaling pathway, leading to cell cycle arrest and apoptosis. Clinically, high expression of PDZK1 predicts a poorer prognosis for glioma patients than low expression of PDZK1. Overall, our study revealed that PDZK1 acts as a novel oncogene in glioma by binding to AKT1 and maintaining the activation of the AKT/mTOR signaling pathway. Thus, PDZK1 may be a potential therapeutic target for glioma.
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Affiliation(s)
- Xing Ren
- Clinical Laboratory Medicine Center, The First Affiliated Hospital of University of South China, Hengyang 421001, Hunan, P.R. China
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang 421001, Hunan, P.R. China
| | - Dan Deng
- Clinical Laboratory Medicine Center, The First Affiliated Hospital of University of South China, Hengyang 421001, Hunan, P.R. China
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang 421001, Hunan, P.R. China
| | - Shasha Xiang
- Clinical Laboratory Medicine Center, The First Affiliated Hospital of University of South China, Hengyang 421001, Hunan, P.R. China
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang 421001, Hunan, P.R. China
| | - Jianbo Feng
- Clinical Laboratory Medicine Center, The First Affiliated Hospital of University of South China, Hengyang 421001, Hunan, P.R. China
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang 421001, Hunan, P.R. China
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Xiang S, Yan W, Ren X, Feng J, Zu X. Role of ferroptosis and ferroptosis-related long non'coding RNA in breast cancer. Cell Mol Biol Lett 2024; 29:40. [PMID: 38528461 DOI: 10.1186/s11658-024-00560-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 03/15/2024] [Indexed: 03/27/2024] Open
Abstract
Ferroptosis, a therapeutic strategy for tumours, is a regulated cell death characterised by the increased accumulation of iron-dependent lipid peroxides (LPO). Tumour-associated long non-coding RNAs (lncRNAs), when combined with traditional anti-cancer medicines or radiotherapy, can improve efficacy and decrease mortality in cancer. Investigating the role of ferroptosis-related lncRNAs may help strategise new therapeutic options for breast cancer (BC). Herein, we briefly discuss the genes and pathways of ferroptosis involved in iron and reactive oxygen species (ROS) metabolism, including the XC-/GSH/GPX4 system, ACSL4/LPCAT3/15-LOX and FSP1/CoQ10/NAD(P)H pathways, and investigate the correlation between ferroptosis and LncRNA in BC to determine possible biomarkers related to ferroptosis.
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Affiliation(s)
- Shasha Xiang
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Wen Yan
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Xing Ren
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Jianbo Feng
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China.
| | - Xuyu Zu
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China.
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Luo Y, Zhu Q, Xiang S, Wang Q, Li J, Chen X, Yan W, Feng J, Zu X. Downregulated circPOKE promotes breast cancer metastasis through activation of the USP10-Snail axis. Oncogene 2023; 42:3236-3251. [PMID: 37717099 DOI: 10.1038/s41388-023-02823-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 09/18/2023]
Abstract
Breast cancer (BC) is the most commonly diagnosed cancer and the leading cause of cancer-related death among females. Metastasis accounts for the majority of BC related deaths. One feasible strategy to solve this challenging problem is to disrupt the capabilities required for tumor metastasis. Herein, we verified a novel metastasis suppressive circRNA, circPOKE in BC. circPOKE was downregulated in primary and metastatic BC tissues and overexpression of circPOKE inhibited the metastatic potential but not the proliferative ability of BC cells in vitro and in vivo. Mechanistically, circPOKE competitively binds to USP10, and reduces its binding to Snail, a key transcriptional regulator of EMT, thereby inhibiting Snail stability via the protein-ubiquitination degradation pathway. In addition, we found that circPOKE could be secreted into the extracellular space via exosomes and that exosome-carried circPOKE significantly inhibited the invasive capabilities of BC cells in vitro and in vivo. Furthermore, the levels of circPOKE, USP10 and Snail are clinically relevant in BC, suggesting that circPOKE may be used as a potential therapeutic target for patients with BC metastasis.
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Affiliation(s)
- Yan Luo
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China
| | - Qingyun Zhu
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China
| | - Shasha Xiang
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China
| | - Qi Wang
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China
| | - Jun Li
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China
| | - Xiguang Chen
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China
| | - Wen Yan
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China
| | - Jianbo Feng
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China.
| | - Xuyu Zu
- Cancer Research Institute, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, PR China.
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Xiang S, Zheng LB, Zhu L, Gao Y, Wang DS, Liu SL, Zhang S, Wang TY, Lu Y. [Radiomics-based prediction of microsatellite instability in stage Ⅱ and Ⅲ rectal cancer patients based on T2WI MRI and diffusion-weighted imaging]. Zhonghua Wai Ke Za Zhi 2023; 61:782-787. [PMID: 37491171 DOI: 10.3760/cma.j.cn112139-20230315-00106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Objective: To examine the radiomics model based on high-resolution T2WI and diffusion weighted imaging (DWI) in predicting microsatellite stability in patients with stage Ⅱ and Ⅲ rectal cancer. Methods: From February 2016 to October 2020, 175 patients with stage Ⅱ and Ⅲ rectal cancer who met the inclusion criteria were retrospectively collected. There were 119 males and 56 females, aged (63.9±9.4) years (range: 37 to 85 years), including 152 patients with microsatellite stability and 23 patients with microsatellite instability. All patients were randomly divided into the training group (n=123) and the validation group (n=52) with a ratio of 7∶3. The region of interest was labeled on the T2WI and DWI images of each patient using the ITK-SNAP software, and PyRadiomics was used to extract seven kinds of radiomics features. After removing redundant features and normalizing features, the least absolute shrinkage and selection operation were used for feature selection. One clinical model, three radiomics models and one clinical-radiomics model were constructed in the training group based on a support vector machine. The area under receiver operating characteristic curve (AUC), sensitivity, specificity, and accuracy were used to evaluate the performance of the models in the verification group. Results: Three clinical features (age, degree of tumor differentiation, and distance from the lower edge of the tumor to the anal edge) and six radiomics features (two DWI-related features and four T2WI-related features) most related to microsatellite status of rectal cancer patients were selected. The AUC of the clinical-radiomics model in the training group was 0.95. In the validation group, the AUC was 0.81, better than the clinical model (0.68, Z=0.71, P=0.04), and equivalent to the T2WI+DWI model (0.82, Z=0.21, P=0.83). Conclusions: Radiomic features based on preoperative T2WI and DWI were related to microsatellite stability in patients with stage Ⅱ and Ⅲ rectal cancer and showed a high classification efficiency. The model based on the features provided a noninvasive and convenient tool for preoperative determination of microsatellite stability in rectal cancer patients.
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Affiliation(s)
- S Xiang
- Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - L B Zheng
- Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - L Zhu
- Shandong Provincial Key Laboratory of Digital Medicine and Computer-Assisted Surgery, Qingdao 266000, China
| | - Y Gao
- Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - D S Wang
- Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - S L Liu
- Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - S Zhang
- Department of Radiology, Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - T Y Wang
- Department of Radiology, Affiliated Hospital of Qingdao University, Qingdao 266000, China
| | - Y Lu
- Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao 266000, China
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Xiang S, Li Y, Li Y, Zhang J, Pan W, Lu Y, Liu S. Increased Dietary Niacin Intake Improves Muscle Strength, Quality, and Glucose Homeostasis in Adults over 40 Years of Age. J Nutr Health Aging 2023; 27:709-718. [PMID: 37754210 DOI: 10.1007/s12603-023-1967-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 07/17/2023] [Indexed: 09/28/2023]
Abstract
BACKGROUND AND AIMS Age-related loss of skeletal muscle mass and strength begins at 40 years of age, and limited evidence suggests that niacin supplementation increases levels of nicotinamide adenine dinucleotide in mouse muscle tissue. In addition, skeletal muscle has a key role in the body's processing of glucose. Therefore, this study aimed to investigate the relationship between dietary niacin and skeletal muscle mass, strength, and glucose homeostasis in people aged 40 years and older. METHODS This study was an American population-based cross-sectional analysis using data from the National Health and Nutrition Examination Survey (NHANES). Considering that some outcomes are only measured in specific survey cycles and subsamples, we established three data sets: a grip strength dataset (2011-2014, n=3772), a body mass components dataset (2011-2018, n=3279), and a glucose homeostasis dataset (1999-2018, n=9189). Dietary niacin and covariates were measured in all survey cycles. Linear regression or logistic regression models that adjusted for several main covariates, such as physical activity and diet, was used to evaluate the relationship between dietary niacin and grip strength, total lean mass, appendicular lean mass, total fat, trunk fat, total bone mineral content, homeostasis model assessment of insulin resistance (HOMA-IR), fasting blood glycose, fasting insulin and sarcopenia risk. Subgroup analyses, a trend test, an interaction test, and a restricted cubic spline were used for further exploration. RESULTS Higher dietary niacin intake was significantly correlated with higher grip strength (β 0.275, 95% confidence intervals [CI] 0.192-0.357), higher total lean mass (β 0.060, 95% CI 0.045-0.074), higher appendicular lean mass (β 0.025, 95% CI 0.018-0.033), and higher total bone mineral content (β 0.005, 95% CI 0.004-0.007). By contrast, higher dietary niacin intake was significantly associated with lower total fat (β -0.061, 95% CI -0.076 to -0.046), lower trunk fat (β -0.041, 95% CI -0.050 to -0.032) and lower sarcopenia risk (OR 0.460, 95% CI 0.233 to 0.907). In addition, dietary niacin significantly reduced HOMA-IR, fasting blood glucose (in participants without diabetes), and fasting insulin (p <0.05). CONCLUSION Niacin is associated with improved body composition (characterized by increased muscle mass and decreased fat content) and improved glucose homeostasis in dietary doses. Dietary niacin supplementation is a feasible way to alleviate age-related muscular loss.
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Affiliation(s)
- S Xiang
- Yun Lu, MD, PhD, Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao, China, , 0000-0003-2253-2983; Shang-Long Liu, MD, PhD, Department of Gastrointestinal Surgery, Affiliated Hospital of Qingdao University, Qingdao, China, , 0000-0002-5828-4718
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Wang J, Li YJ, Li XX, Sun YX, Xiang S, Zhang MQ, Li XJ, Qiu ZK. Late-Night Overeating and All-Cause and Cardiovascular Disease Mortality in Adults Aged ≥ 50: A Cohort Study. J Nutr Health Aging 2023; 27:701-708. [PMID: 37754209 DOI: 10.1007/s12603-023-1966-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 07/17/2023] [Indexed: 09/28/2023]
Abstract
BACKGROUND Late-night overeating (LNOE) is closely associated with many health risk factors, but whether LNOE can increase the risk of death remains unknown. Thus, the prospective cohort study aimed to investigate the relationship between LNOE and mortality using data from the National Health and Nutrition Examination Survey. METHODS 11,893 participants aged 50 years and older were included in the study. Dietary information was obtained through 24-h dietary recall interviews. Cox regression, subgroup, sensitivity, and restricted cubic spline analyses were used to assess the association between LNOE and mortality. RESULTS During a median follow-up of 8.3 years, 2,498 deaths occurred. After adjusting for major confounders, compared to the non-late-night eating (NLNE) group, the LNOE group was associated with higher risks of all-cause (HR = 1.47, 95% CI = 1.06-2.04) and cardiovascular disease (CVD) mortality (HR = 2.02, 95% CI = 1.13-3.60). No significant association was found between late-night eating (LNE) and mortality. Subgroup analyses showed that the LNOE group had a greater risk of all-cause and CVD mortality in participants older than 70 years, with alcohol consumption and hypertension and demonstrated an increased risk of all-cause mortality in males and higher CVD mortality in females. CONCLUSION The habit of LNOE was an independent risk factor for all-cause and CVD mortality in US adults aged 50 years and older, which was also influenced by age, sex, alcohol consumption, and hypertension.
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Affiliation(s)
- J Wang
- Zhen-kang Qiu, PhD, MD, Interventional Medical Center, The Affiliated Hospital of Qingdao University, 16, Jiangsu Road, Qingdao 266003, Shandong Province, China, Tel: 86-0532-82913275, Fax: 86-0532-82913275,
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Luo Y, Xiang S, Feng J. Protein Phase Separation: New Insights into Carcinogenesis. Cancers (Basel) 2022; 14:cancers14235971. [PMID: 36497453 PMCID: PMC9740862 DOI: 10.3390/cancers14235971] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 11/29/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
Phase separation is now acknowledged as an essential biologic mechanism wherein distinct activated molecules assemble into a different phase from the surrounding constituents of a cell. Condensates formed by phase separation play an essential role in the life activities of various organisms under normal physiological conditions, including the advanced structure and regulation of chromatin, autophagic degradation of incorrectly folded or unneeded proteins, and regulation of the actin cytoskeleton. During malignant transformation, abnormally altered condensate assemblies are often associated with the abnormal activation of oncogenes or inactivation of tumor suppressors, resulting in the promotion of the carcinogenic process. Thus, understanding the role of phase separation in various biological evolutionary processes will provide new ideas for the development of drugs targeting specific condensates, which is expected to be an effective cancer therapy strategy. However, the relationship between phase separation and cancer has not been fully elucidated. In this review, we mainly summarize the main processes and characteristics of phase separation and the main methods for detecting phase separation. In addition, we summarize the cancer proteins and signaling pathways involved in phase separation and discuss their promising future applications in addressing the unmet clinical therapeutic needs of people with cancer. Finally, we explain the means of targeted phase separation and cancer treatment.
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Pan X, Xiang S, Zhu Y, Yang M. Co-cultivation with Endophytic Fungi Differentially Shaped the Anthocyanin Profiles in Post-veraison Grape Berries. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822060138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Adeeb N, Dibas M, Griessenauer CJ, Cuellar HH, Salem MM, Xiang S, Enriquez-Marulanda A, Hong T, Zhang H, Taussky P, Grandhi R, Waqas M, Aldine AS, Tutino VM, Aslan A, Siddiqui AH, Levy EI, Ogilvy CS, Thomas AJ, Ulfert C, Möhlenbruch MA, Renieri L, Bengzon Diestro JD, Lanzino G, Brinjikji W, Spears J, Vranic JE, Regenhardt RW, Rabinov JD, Harker P, Müller-Thies-Broussalis E, Killer-Oberpfalzer M, Islak C, Kocer N, Sonnberger M, Engelhorn T, Kapadia A, Yang VXD, Salehani A, Harrigan MR, Krings T, Matouk CC, Mirshahi S, Chen KS, Aziz-Sultan MA, Ghorbani M, Schirmer CM, Goren O, Dalal SS, Finkenzeller T, Holtmannspötter M, Buhk JH, Foreman PM, Cress MC, Hirschl RA, Reith W, Simgen A, Janssen H, Marotta TR, Stapleton CJ, Patel AB, Dmytriw AA. Learning Curve for Flow Diversion of Posterior Circulation Aneurysms: A Long-Term International Multicenter Cohort Study. AJNR Am J Neuroradiol 2022; 43:1615-1620. [PMID: 36229166 PMCID: PMC9731249 DOI: 10.3174/ajnr.a7679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 06/28/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND AND PURPOSE Flow diversion has gradually become a standard treatment for intracranial aneurysms of the anterior circulation. Recently, the off-label use of the flow diverters to treat posterior circulation aneurysms has also increased despite initial concerns of rupture and the suboptimal results. This study aimed to explore the change in complication rates and treatment outcomes across time for posterior circulation aneurysms treated using flow diversion and to further evaluate the mechanisms and variables that could potentially explain the change and outcomes. MATERIALS AND METHODS A retrospective review using a standardized data set at multiple international academic institutions was performed to identify patients with ruptured and unruptured posterior circulation aneurysms treated with flow diversion during a decade spanning January 2011 to January 2020. This period was then categorized into 4 intervals. RESULTS A total of 378 procedures were performed during the study period. Across time, there was an increasing tendency to treat more vertebral artery and fewer large vertebrobasilar aneurysms (P = .05). Moreover, interventionalists have been increasingly using fewer overlapping flow diverters per aneurysm (P = .07). There was a trend toward a decrease in the rate of thromboembolic complications from 15.8% in 2011-13 to 8.9% in 2018-19 (P = .34). CONCLUSIONS This multicenter experience revealed a trend toward treating fewer basilar aneurysms, smaller aneurysms, and increased usage of a single flow diverter, leading to a decrease in the rate of thromboembolic and hemorrhagic complications.
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Affiliation(s)
- N Adeeb
- From the Departments of Neurosurgery and Interventional Neuroradiology (N.A., M.D., H.H.C., A.S.A., A.A.), Louisiana State University Hospital, Shreveport, Louisiana
| | - M Dibas
- From the Departments of Neurosurgery and Interventional Neuroradiology (N.A., M.D., H.H.C., A.S.A., A.A.), Louisiana State University Hospital, Shreveport, Louisiana
| | - C J Griessenauer
- Departments of Neurosurgery and Radiology (C.J.G., C.M.S., O.G., S.S.D.), Geisinger, Danville, Pennsylvania
- Department of Neurology/Institut of Neurointervention (C.J.G., E.M.-T.-B., M.K.-O.), University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - H H Cuellar
- From the Departments of Neurosurgery and Interventional Neuroradiology (N.A., M.D., H.H.C., A.S.A., A.A.), Louisiana State University Hospital, Shreveport, Louisiana
| | - M M Salem
- Neurosurgical Service (M.M.S., A.E.-M., P.T., C.S.O.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - S Xiang
- Department of Neurosurgery (S.X., H.Z., T.H.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - A Enriquez-Marulanda
- Neurosurgical Service (M.M.S., A.E.-M., P.T., C.S.O.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - T Hong
- Department of Neurosurgery (S.X., H.Z., T.H.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - H Zhang
- Department of Neurosurgery (S.X., H.Z., T.H.), Xuanwu Hospital, Capital Medical University, Beijing, China
| | - P Taussky
- Neurosurgical Service (M.M.S., A.E.-M., P.T., C.S.O.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
- Department of Neurosurgery (P.T., R.G.), University of Utah, Salt Lake City, Utah
| | - R Grandhi
- Department of Neurosurgery (P.T., R.G.), University of Utah, Salt Lake City, Utah
| | - M Waqas
- Department of Neurosurgery (M.W., V.M.T., A.H.S., E.I.L.), State University of New York at Buffalo, Buffalo, New York
| | - A S Aldine
- From the Departments of Neurosurgery and Interventional Neuroradiology (N.A., M.D., H.H.C., A.S.A., A.A.), Louisiana State University Hospital, Shreveport, Louisiana
| | - V M Tutino
- Department of Neurosurgery (M.W., V.M.T., A.H.S., E.I.L.), State University of New York at Buffalo, Buffalo, New York
| | - A Aslan
- From the Departments of Neurosurgery and Interventional Neuroradiology (N.A., M.D., H.H.C., A.S.A., A.A.), Louisiana State University Hospital, Shreveport, Louisiana
| | - A H Siddiqui
- Department of Neurosurgery (M.W., V.M.T., A.H.S., E.I.L.), State University of New York at Buffalo, Buffalo, New York
| | - E I Levy
- Department of Neurosurgery (M.W., V.M.T., A.H.S., E.I.L.), State University of New York at Buffalo, Buffalo, New York
| | - C S Ogilvy
- Neurosurgical Service (M.M.S., A.E.-M., P.T., C.S.O.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - A J Thomas
- Department of Neurological Surgery (A.J.T.), Cooper University Health Care, Cooper Medical School of Rowan University, Camden, New Jersey
| | - C Ulfert
- Department of Neuroradiology (C.U., M.A.M.), Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - M A Möhlenbruch
- Department of Neuroradiology (C.U., M.A.M.), Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - L Renieri
- Department of Interventional Neuroradiology (L.R.), University of Florence, Florence, Italy
| | - J D Bengzon Diestro
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D., J.S., T.R.M.), St. Michael's Hospital, Toronto, Ontario, Canada
| | - G Lanzino
- Department of Neurological Surgery (G.L., W.B.), Mayo Clinic, Rochester, Minnesota
| | - W Brinjikji
- Department of Neurological Surgery (G.L., W.B.), Mayo Clinic, Rochester, Minnesota
| | - J Spears
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D., J.S., T.R.M.), St. Michael's Hospital, Toronto, Ontario, Canada
| | - J E Vranic
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - R W Regenhardt
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - J D Rabinov
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - P Harker
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - E Müller-Thies-Broussalis
- Department of Neurology/Institut of Neurointervention (C.J.G., E.M.-T.-B., M.K.-O.), University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - M Killer-Oberpfalzer
- Department of Neurology/Institut of Neurointervention (C.J.G., E.M.-T.-B., M.K.-O.), University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - C Islak
- Department of Neuroradiology (C.I., N.K.), Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
| | - N Kocer
- Department of Neuroradiology (C.I., N.K.), Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
| | - M Sonnberger
- Department of Neuroradiology (M.S.), Kepler Universitätsklinikum Linz, Linz, Austria
| | - T Engelhorn
- Department of Neuroradiology (T.E.), University Hospital Erlangen, Erlangen, Germany
| | - A Kapadia
- Departments of Medical Imaging and Neurosurgery (A.K.), Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - V X D Yang
- Neurointerventional Program (V.X.D.Y., A.A.D.), Departments of Medical Imaging & Clinical Neurological Sciences, London Health Sciences Centre, Western University, Ontario, Canada
| | - A Salehani
- Department of Neurosurgery (A. Salehani, M.R.H.), University of Alabama at Birmingham, Birmingham, Alabama
| | - M R Harrigan
- Department of Neurosurgery (A. Salehani, M.R.H.), University of Alabama at Birmingham, Birmingham, Alabama
| | - T Krings
- Division of Interventional Neuroradiology (T.K.), Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada
| | - C C Matouk
- Department of Neurosurgery (C.C.M.), Yale School of Medicine, New Haven, Connecticut
| | - S Mirshahi
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - K S Chen
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - M A Aziz-Sultan
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - M Ghorbani
- Division of Vascular and Endovascular Neurosurgery (M.G.), Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - C M Schirmer
- Departments of Neurosurgery and Radiology (C.J.G., C.M.S., O.G., S.S.D.), Geisinger, Danville, Pennsylvania
| | - O Goren
- Departments of Neurosurgery and Radiology (C.J.G., C.M.S., O.G., S.S.D.), Geisinger, Danville, Pennsylvania
| | - S S Dalal
- Departments of Neurosurgery and Radiology (C.J.G., C.M.S., O.G., S.S.D.), Geisinger, Danville, Pennsylvania
| | - T Finkenzeller
- Institute of Radiology and Neuroradiology (T.F., M.H.), Klinikum Nuernberg Sued, Paracelsus Medical University Nuernberg, Nuernberg, Germany
| | - M Holtmannspötter
- Institute of Radiology and Neuroradiology (T.F., M.H.), Klinikum Nuernberg Sued, Paracelsus Medical University Nuernberg, Nuernberg, Germany
- Department of Neuroradiology (M.H.), Klinikum Weiden, Weiden, Germany
| | - J-H Buhk
- Department of Neuroradiology (J.-H.B.), University Hospital Hamburg Eppendorf, Hamburg, Germany
| | - P M Foreman
- Neuroscience and Rehabilitation Institute (P.M.F., M.C.C., R.A.H.), Orlando Health, Orlando, Florida
| | - M C Cress
- Neuroscience and Rehabilitation Institute (P.M.F., M.C.C., R.A.H.), Orlando Health, Orlando, Florida
| | - R A Hirschl
- Neuroscience and Rehabilitation Institute (P.M.F., M.C.C., R.A.H.), Orlando Health, Orlando, Florida
| | - W Reith
- Clinic for Diagnostic and Interventional Neuroradiology (W.R., A. Simgen), Universitätsklinikum des Saarlandes, Homburg/Saar, Germany
| | - A Simgen
- Clinic for Diagnostic and Interventional Neuroradiology (W.R., A. Simgen), Universitätsklinikum des Saarlandes, Homburg/Saar, Germany
| | - H Janssen
- Institute for Neuroradiology (H.J.), Klinikum Ingolstadt, Ingolstadt, Germany
| | - T R Marotta
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D., J.S., T.R.M.), St. Michael's Hospital, Toronto, Ontario, Canada
| | - C J Stapleton
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - A B Patel
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - A A Dmytriw
- Neurointerventional Program (V.X.D.Y., A.A.D.), Departments of Medical Imaging & Clinical Neurological Sciences, London Health Sciences Centre, Western University, Ontario, Canada
- Neuroendovascular Program (J.E.V., R.W.R., J.D.R., P.H., S.M., K.S.C., M.A.A.-S., C.J.S., A.B.P., A.A.D.), Massachusetts General Hospital & Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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11
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Wang T, You F, Li Y, Xiang S, Wu H, Meng H, Yang N, Zhang B, Yang L. 759P Preconditioning with irradiation enhances efficacy of B7-H3-CAR-T in treating solid tumor models. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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12
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Liu P, Ye Y, Xiang S, Li Y, Zhu C, Chen Z, Hu J, Gen Y, Lou L, Duan X, Zhang J, Gu W. iTRAQ-Based Quantitative Proteomics Analysis Reveals the Invasion Mechanism of Spiroplasma eriocheiris in 3T6 Cells. CURR PROTEOMICS 2022. [DOI: 10.2174/1570164619666220113154423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Spiroplasma eriocheiris is a novel pathogen of freshwater crustaceans and
is closely related to S. mirum. They have no cell wall and a helical morphology. They have the ability
to infect mammals with an unclear mechanism.
Objective:
In this study, our aim was to investigate the profile of protein expression in 3T6 cells infected
with S. eriocheiris.
Methods:
The proteome of 3T6 cells infected by S. eriocheiris was systematically investigated by
iTRAQ.
Results:
We identified and quantified 4915 proteins, 67 differentially proteins were found, including
30 up-regulated proteins and 37 down-regulated proteins. GO term analysis shows that dysregulation
of adhesion protein , interferon and cytoskeletal regulation are associated with apoptosis. Adhesion
protein Vcam1 and Interferon-induced protein GBP2, Ifit1, TAPBP, CD63 ,Arhgef2 were
up-regulated. A key cytoskeletal regulatory protein, ARHGEF17 was down-regulated. KEGG pathway
analysis showed the NF-kappa B signaling pathway, the MAPK signaling pathway , the Jak-STAT
signaling pathway and NOD-like receptor signaling are closely related to apoptosis in vivo.
Conclusion:
Analysis of the signaling pathways involved in invasion may provide new insights for
understanding the infection mechanisms of S. eriocheiris.
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Affiliation(s)
- Peng Liu
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Youyuan Ye
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Shasha Xiang
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Yuxin Li
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Chengbin Zhu
- Hengyang Chinese
Medicine Hospital, Hengyang 421001, Hunan, China
| | - Zixu Chen
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Jie Hu
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Ye Gen
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Li Lou
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Xuqi Duan
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Juan Zhang
- Institute of Pathogenic Biology, Hengyang Medical College, Institute of Pharmacy and Pharmacology, University of
South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative
Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Wei Gu
- Jiangsu Key Laboratory
for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College
of Life Sciences, Nanjing Normal University, No.1 Wenyuan Road, 210046 Nanjing, China
- Co-Innovation Center for
Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, 222005 Jiangsu, China
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Zhang Y, Shi L, Xiang S, Ge Y, Zheng Y, Xia Y, Han H, Su X, Fang S, Chen J, Zhu X. Effect of methylcobalamin-C-10-Br from stinky tofu on inhibition of Listeria monocytogenes and alteration of microbiota in an in vitro colonic simulation. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Shang GQ, Xiang S, Guo CC, Guo JJ, Zhang HN, Wang YZ, Xu H. [Diagnostic value of platelet associated biomarkers in chronic periprosthetic joint infection]. Zhonghua Wai Ke Za Zhi 2021; 59:767-772. [PMID: 34404175 DOI: 10.3760/cma.j.cn112139-20210401-00152] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the diagnostic value of platelet count(PC),PC to mean platelet volume(MPV) ratio(PC/MPV) and plateletcrit(PCT) in chronic periprosthetic joint infection(PJI). Method: The medical records of 159 patients who underwent hip or knee revisions at Department of Joint Surgery,Affiliated Hospital of Qingdao University from August 2013 to June 2019 were retrospectively reviewed. There were 51 patients(26 knees and 25 hips) in the PJI group,which included 28 males and 23 females,aged (68.0±11.8)years (range:32 to 84 years)with a body mass index(BMI)of (26.1±3.6) kg/m².There were 116 patients(19 knees and 97 hips) in the aseptic loosening(AL) group,including 67 males and 49 females,aged (70.3±8.9)years(range:49 to 89 years)with a BMI of (25.0±3.6)kg/m².The plasma C-reactive protein(CRP),erythrocyte sedimentation rate(ESR),PC,MPV,PC/MPV and PCT levels of the two groups were recorded and analyzed. Receiver operating characteristic curve was used to calculate the sensitivity and specificity of each biomarker,expect for MPV,and the diagnostic value of each biomarker was compared according to the area under the curve(AUC).Independent-sample t test or Mann-Whitney U test were used for comparison between groups. Result: Compared with AL group,AJI group had significantly higher levels of CRP,ESR,PC,PC/MPV and PCT(all P<0.05),but lower level of MPV (P<0.05).The AUCs for CRP,ESR,PC,PC/MPV and PCT were 0.820, 0.829, 0.689, 0.668 and 0.676,respectively. Based on the Youden index,the optimal predictive cutoff for CRP was 11.12 mg/L,with a sensitivity of 74.4% and a specificity of 87.1%.The optimal predictive cutoff for ESR was 17.60 mm/1 h,with a sensitivity of 81.4% and a specificity of 75.3%.The optimal predictive cutoff for PC was 243.00×109/L,with a sensitivity of 60.6% and a specificity of 71.8%.The optimal predictive cutoff for PC/MPV was 24.95,the sensitivity was 58.1% and the specificity was 74.1%.And the optimal predictive cutoff for PCT was 0.24%,with a sensitivity of 69.8% and a specificity of 63.5%. Conclusion: PC,PC to MPV ratio and PCT were of limited value to diagnose PJI.
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Affiliation(s)
- G Q Shang
- Department of Joint Surgery,Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - S Xiang
- Department of Joint Surgery,Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - C C Guo
- Department of Joint Surgery,Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - J J Guo
- Department of Joint Surgery,Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - H N Zhang
- Department of Joint Surgery,Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - Y Z Wang
- Department of Joint Surgery,Affiliated Hospital of Qingdao University,Qingdao 266000,China
| | - H Xu
- Department of Joint Surgery,Affiliated Hospital of Qingdao University,Qingdao 266000,China
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Zhang M, Zhang M, Fu X, Meng H, Chen D, Wang M, Zhang L, Li L, Li X, Wang X, Sun Z, Yu H, Li Z, Nan F, Chang Y, Zhou Z, Yan J, Li J, Wang Y, You F, Wang Y, Xiang S, Chen Y, Pan G, Xu H, Zhang B, Yang L. A SINGLE‐ARM, OPEN‐LABEL, PILOT TRIAL OF AUTOLOGOUS CD7‐CAR‐T CELLS FOR CD7 POSITIVE RELAPSED AND REFRACTORY T‐LYMPHOBLASTIC LEUKEMIA/LYMPHOMA. Hematol Oncol 2021. [DOI: 10.1002/hon.181_2880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- M. Zhang
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - M. Zhang
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - X. Fu
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - H. Meng
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
| | - D. Chen
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
| | - M. Wang
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
| | - L. Zhang
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - L. Li
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - X. Li
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - X. Wang
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - Z. Sun
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - H. Yu
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - Z. Li
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - F. Nan
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - Y. Chang
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - Z. Zhou
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - J. Yan
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - J. Li
- The First Affiliated Hospital of Zhengzhou University Department of Oncology Zhengzhou China
| | - Y. Wang
- PersonGen‐Anke Cellular Therapeutics Co., Ltd PersonGen‐Anke Cellular Therapeutics Co., Ltd Suzhou China
| | - F. You
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
| | - Y. Wang
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
| | - S. Xiang
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
| | - Y. Chen
- PersonGen‐Anke Cellular Therapeutics Co., Ltd PersonGen‐Anke Cellular Therapeutics Co., Ltd Suzhou China
| | - G. Pan
- PersonGen‐Anke Cellular Therapeutics Co., Ltd PersonGen‐Anke Cellular Therapeutics Co., Ltd Suzhou China
| | - H. Xu
- PersonGen‐Anke Cellular Therapeutics Co., Ltd PersonGen‐Anke Cellular Therapeutics Co., Ltd Suzhou China
| | - B. Zhang
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
| | - L. Yang
- PersonGen BioTherapeutics (Suzhou) Co., Ltd. PersonGen BioTherapeutics (Suzhou) Co., Ltd. Suzhou China
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16
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Xiang S, Ye K, Li M, Ying J, Wang H, Han J, Shi L, Xiao J, Shen Y, Feng X, Bao X, Zheng Y, Ge Y, Zhang Y, Liu C, Chen J, Chen Y, Tian S, Zhu X. Xylitol enhances synthesis of propionate in the colon via cross-feeding of gut microbiota. Microbiome 2021; 9:62. [PMID: 33736704 PMCID: PMC7977168 DOI: 10.1186/s40168-021-01029-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 02/05/2021] [Indexed: 05/12/2023]
Abstract
BACKGROUND Xylitol, a white or transparent polyol or sugar alcohol, is digestible by colonic microorganisms and promotes the proliferation of beneficial bacteria and the production of short-chain fatty acids (SCFAs), but the mechanism underlying these effects remains unknown. We studied mice fed with 0%, 2% (2.17 g/kg/day), or 5% (5.42 g/kg/day) (weight/weight) xylitol in their chow for 3 months. In addition to the in vivo digestion experiments in mice, 3% (weight/volume) (0.27 g/kg/day for a human being) xylitol was added to a colon simulation system (CDMN) for 7 days. We performed 16S rRNA sequencing, beneficial metabolism biomarker quantification, metabolome, and metatranscriptome analyses to investigate the prebiotic mechanism of xylitol. The representative bacteria related to xylitol digestion were selected for single cultivation and co-culture of two and three bacteria to explore the microbial digestion and utilization of xylitol in media with glucose, xylitol, mixed carbon sources, or no-carbon sources. Besides, the mechanisms underlying the shift in the microbial composition and SCFAs were explored in molecular contexts. RESULTS In both in vivo and in vitro experiments, we found that xylitol did not significantly influence the structure of the gut microbiome. However, it increased all SCFAs, especially propionate in the lumen and butyrate in the mucosa, with a shift in its corresponding bacteria in vitro. Cross-feeding, a relationship in which one organism consumes metabolites excreted by the other, was observed among Lactobacillus reuteri, Bacteroides fragilis, and Escherichia coli in the utilization of xylitol. At the molecular level, we revealed that xylitol dehydrogenase (EC 1.1.1.14), xylulokinase (EC 2.7.1.17), and xylulose phosphate isomerase (EC 5.1.3.1) were key enzymes in xylitol metabolism and were present in Bacteroides and Lachnospiraceae. Therefore, they are considered keystone bacteria in xylitol digestion. Also, xylitol affected the metabolic pathway of propionate, significantly promoting the transcription of phosphate acetyltransferase (EC 2.3.1.8) in Bifidobacterium and increasing the production of propionate. CONCLUSIONS Our results revealed that those key enzymes for xylitol digestion from different bacteria can together support the growth of micro-ecology, but they also enhanced the concentration of propionate, which lowered pH to restrict relative amounts of Escherichia and Staphylococcus. Based on the cross-feeding and competition among those bacteria, xylitol can dynamically balance proportions of the gut microbiome to promote enzymes related to xylitol metabolism and SCFAs. Video Abstract.
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Affiliation(s)
- Shasha Xiang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Kun Ye
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Mian Li
- Zhejiang Huakang Pharmaceutical Co., Ltd., Kaihua, 324302 China
| | - Jian Ying
- Nutrition and Health Research Institute, COFCO Ltd., Beijing, 102209 China
| | - Huanhuan Wang
- School of Medicine, Hangzhou Normal University, Hangzhou, 310018 China
- Laboratory of Aging and Cancer Biology of Zhejiang Province, Hangzhou Normal University, Hangzhou, 311121 China
| | - Jianzhong Han
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Lihua Shi
- Zhejiang Huakang Pharmaceutical Co., Ltd., Kaihua, 324302 China
| | - Jie Xiao
- Nutrition and Health Research Institute, COFCO Ltd., Beijing, 102209 China
| | - Yubiao Shen
- Yangtze Delta Institute of Tsinghua University, Jiaxing, 314000 China
| | - Xiao Feng
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Xuan Bao
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yiqing Zheng
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yin Ge
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yalin Zhang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Chang Liu
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122 China
| | - Jie Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Yuewen Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Shiyi Tian
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
| | - Xuan Zhu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018 China
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Zheng Y, Xiang S, Zhang H, Ye K, Zhang Y, Ge Y, Feng X, Bao X, Chen J, Zhu X. Vitamin B12 Enriched in Spinach and its Effects on Gut Microbiota. J Agric Food Chem 2021; 69:2204-2212. [PMID: 33557521 DOI: 10.1021/acs.jafc.0c07597] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Meat and fermented foods are the main source of vitamin B12 (cobalamin) for human beings. Therefore, daily cobalamin intake is a big problem for vegans. In this study, cyanocobalamin (CNCBL) was added to the culture broth for cobalamin enrichment in spinach. After 36 h of cultivation, the accumulated CNCBL in the spinach leaves (wet weight) was as high as 0.48% (concentration), and the leaves still contained 0.94 ± 0.11 μg/g CNCBL after boiling, which could provide consumer daily requirement of CNCBL. Because CNCBL supplementation had adverse effects on gut microbiota, this study focused on the effect of the combination of spinach and CNCBL on gut microbiota as well. After the boiled leaves were passed through an in vitro gastrointestinal tract simulation system, it was found that the spinach protected CNCBL against the low-pH gastric acid. Moreover, compared with the CNCBL supplement group, the relative abundances of Bacteroides and Firmicutes increased, and the relative abundance of Proteobacteria, especially Escherichia spp., reduced. Analysis of short-chain fatty acids (SCFAs) showed that cobalamin-rich spinach was positively correlated with Bacteroides, propionate, and butyrate. The results showed that the method of enriching spinach with CNCBL was effective and had beneficial effects on gut microbiota and SCFAs.
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Affiliation(s)
- Yiqing Zheng
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Shasha Xiang
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Hongxing Zhang
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Kun Ye
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Yalin Zhang
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Yin Ge
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Xiao Feng
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Xuan Bao
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Jie Chen
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Xuan Zhu
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou 310018, China
- School of Basic Medicine, Hangzhou Normal University, Hangzhou 311121, China
- Laboratory of Aging and Cancer Biology of Zhejiang Province, Hangzhou Normal University, Hangzhou 311121, China
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Chen F, Bao X, Liu S, Ye K, Xiang S, Yu L, Xu Q, Zhang Y, Wang X, Zhu X, Ying J, Shen Y, Ji W, Si S. Gut microbiota affect the formation of calcium oxalate renal calculi caused by high daily tea consumption. Appl Microbiol Biotechnol 2021; 105:789-802. [PMID: 33404827 DOI: 10.1007/s00253-020-11086-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 12/17/2020] [Accepted: 12/28/2020] [Indexed: 01/14/2023]
Abstract
Kidney stones are a common and frequently occurring disease worldwide. Stones can cause urinary tract obstruction, pain, haematuria, and other symptoms. In this study, the relationship between calcium oxalate renal calculi and gut microbiota was considered. The dietary habits of 30 patients with calcium oxalate kidney stones and 30 healthy people were investigated. The 16S rDNA sequences and short-chain fatty acids (SCFAs) in their stool samples were analysed. We identified 5 genera of the gut microbiota as biomarkers for calcium oxalate renal calculi, namely, Bacteroides, Phascolarctobacterium, Faecalibacterium, Akkermansia, and Lactobacillus, with a receiver operating characteristic (ROC) curve value of 0.871 (95% confidence interval (CI) 0.785-0.957). Phascolarctobacterium and Faecalibacterium showed a positive relationship with SCFA synthesis to reduce the risk of kidney stones. Meanwhile, according to the analysis, Lactobacillus spp. made the largest contribution (79%) to prevent kidney stones caused by tea consumption, since tea offers the great parts of oxalate in kidney stone formation. Three strains of Lactobacillus spp. were isolated from stools of a healthy person with a high level of tea consumption who did not suffer from kidney stones. All these strains survived in the colon with supplementation of high concentrations of tea and efficiently degraded oxalic acid (Ca. 50%) in an in vitro colonic simulation. Therefore, a suitable adjustment of the gut microbiota or SCFA concentration enhanced the degradation of oxalate from food, which can be applied to prevent the formation of calcium oxalate renal calculi caused by tea. KEY POINTS: • Five genera, including Lactobacillus, were identified as biomarkers for calcium oxalate renal calculi. • Lactobacillus is a potential gut bacterium associated with preventing kidney stone formation. • Isolated Lactobacillus strains have the ability to degrade oxalic acid in vitro.
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Affiliation(s)
- Feng Chen
- Department of Urology, Jiaxing Ivy Hospital, Jiaxing, Zhejiang, People's Republic of China
| | - Xuan Bao
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou, Zhejiang, People's Republic of China
| | - Shiyu Liu
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou, Zhejiang, People's Republic of China
| | - Kun Ye
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou, Zhejiang, People's Republic of China
| | - Shasha Xiang
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou, Zhejiang, People's Republic of China
| | - Liting Yu
- Department of Urology, China Coast Guard of the Chinese People Armed Police Force Corps Hospital, Jiaxing, Zhejiang, People's Republic of China
| | - Qingkang Xu
- Department of Urology, Jiaxing Ivy Hospital, Jiaxing, Zhejiang, People's Republic of China
| | - Yuehong Zhang
- Department of Urology, China Coast Guard of the Chinese People Armed Police Force Corps Hospital, Jiaxing, Zhejiang, People's Republic of China
| | - Xiu Wang
- Nanhu College of Jiaxing University, Jiaxing, Zhejiang, People's Republic of China
| | - Xuan Zhu
- School of Food Science and Bioengineering, Zhejiang Gongshang University, Hangzhou, Zhejiang, People's Republic of China.
| | - Jian Ying
- COFCO Nutrition and Health Research Institute, Beijing, China
| | - Yubiao Shen
- Yangtze Delta Region Institute of Tsinghua University, Zhejiang, People's Republic of China
| | - Wei Ji
- Yangtze Delta Region Institute of Tsinghua University, Zhejiang, People's Republic of China
| | - Shufeng Si
- Shandong Zhongke-jiayi Bioengineering Co., Ltd, Weifang, People's Republic of China
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Liu P, Hou L, Liu M, Xu X, Gao Q, Deng J, Xiang S, Cao Q, Zhou M, Yang Q, Wang W, Gu W, Meng Q. Phosphoproteomic Analysis of Spiroplasma eriocheiris and Crosstalk with Acetylome Reveals the Role of Post-Translational Modifications in Metabolism. CURR PROTEOMICS 2020. [DOI: 10.2174/1570164617666191017140456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Post-translational modifications (PTMs) such as phosphorylation are an essential regulatory mechanism of protein function and associated with a range of biological processes beyond genome and transcriptome. Spiroplasma eriocheiris, a wall-less helical bacterium, is one of the smallest known self-replicating bacteria and a novel pathogen of freshwater crustacean.
Methods:
To study the physiological characteristics and regulatory mechanism of S. eriocheiris, the protein phosphorylation in the bacterium were systematically investigated by iTRAQ analyzed by LC-MS/MS. Data are available via ProteomeXchange with identifier PXD015055.
Results:
We identified 465 phosphorylation sites in 246 proteins involved in a broad spectrum of fundamental biological process ranging from regulation of metabolic pathways to protein synthesis. Notably, most proteins in glycolysis and all proteins in the arginine deiminase system were phosphorylated. Meanwhile, the cytoskeleton proteins (Fibril, Mrebs and ET-Tu) were all phosphorylated suggest that the phosphorylation also may play a crucial role in cell skeleton formation. We have got a lot of highly conserved proteins and phosphorylation sites by analysis, and those proteins or phosphorylation sites were mainly participated in glucose metabolism and protein synthesis. Crosstalk analysis with protein-protein interaction networks in relation to phosphorylated proteins and acetylated proteins found that the two PTMs are required for playing crucial roles in many physiological processes in S. eriocheiris. By comparing the relative positions of acetylation versus phosphorylation, we found that the two modifications often found close to proximity on the same protein.
Conclusions:
The results imply that there is previously unreported hidden role of phosphorylation that define the functional state of Spiroplasma.
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Affiliation(s)
- Peng Liu
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Libo Hou
- Jiangsu Key Laboratory for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, 210046 Nanjing, China
| | - Min Liu
- Jiangsu Key Laboratory for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, 210046 Nanjing, China
| | - Xuechuan Xu
- Jiangsu Key Laboratory for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, 210046 Nanjing, China
| | - Qi Gao
- Jiangsu Key Laboratory for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, 210046 Nanjing, China
| | - Jiewen Deng
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Shasha Xiang
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Qian Cao
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Min Zhou
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Quanjie Yang
- Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Hengyang 421001, Hunan, China
| | - Wen Wang
- Jiangsu Key Laboratory for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, 210046 Nanjing, China
| | - Wei Gu
- Jiangsu Key Laboratory for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, 210046 Nanjing, China
| | - Qingguo Meng
- Jiangsu Key Laboratory for Microbes & Functional Genomics and Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Life Sciences, Nanjing Normal University, 1 Wenyuan Road, 210046 Nanjing, China
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20
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Xiang S, Fu J, Ye K, Zheng Y, Zhu X, Chen J, Chen Y. Effect of Lactobacillus gasseri PA3 on gut microbiota in an in vitro colonic simulation. Food Sci Nutr 2019; 7:3883-3891. [PMID: 31890166 PMCID: PMC6924308 DOI: 10.1002/fsn3.1236] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 08/30/2019] [Accepted: 09/02/2019] [Indexed: 12/12/2022] Open
Abstract
It has been reported that Lactobacillus gasseri PA3 has an ability to absorb exogenous purines in the intestine to reduce a risk of gout and hyperuricemia. However, influences of this strain on gut microbiota and their metabolisms remain unclear. Herein, we aimed to investigate the effect of L. gasseri PA3 on microbiota composition and metabolisms. L. gasseri PA3 was isolated from yogurt and supplemented into a single-stage colonic fermentation in a culture volume of 30 ml and subjected to in vitro colonic simulation for 8 days. Microbiota composition was determined with 16S rRNA (V3 + V4) sequencing, and their metabolisms were predicted by PICRUSt. Short-chain fatty acids were measured by GC-MS. We found that L. gasseri PA3 reduced the diversity of microbiota, increased the relative abundances of Lactobacillus (73.5%) and Escherichia (36.5%), and decreased Bacterioides and Phascolarctobacterium. Total amount of short-chain fatty acids was found to decline. Fundamental metabolisms, especially nucleotide, was significantly higher after intervention with L. gasseri PA3, but the purine metabolism was lower, which means that PA3 might reduce uric acid concentrations by weakening purine metabolism. Our results indicated that L. gasseri PA3 can survive and play a role in the ascending colon environment. Therefore, the evaluation of the effect of L. gasseri PA3 on intestinal microbes and their metabolisms has great guiding significance for the development of treatment to prevent gout.
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Affiliation(s)
- Shasha Xiang
- School of Food Science and BioengineeringZhejiang Gongshang UniversityHangzhouChina
| | - Jian Fu
- Eurofins Technology Service Qingdao Co., LtdQingdaoChina
| | - Kun Ye
- School of Food Science and BioengineeringZhejiang Gongshang UniversityHangzhouChina
| | - Yiqing Zheng
- School of Food Science and BioengineeringZhejiang Gongshang UniversityHangzhouChina
| | - Xuan Zhu
- School of Food Science and BioengineeringZhejiang Gongshang UniversityHangzhouChina
| | - Jie Chen
- School of Food Science and BioengineeringZhejiang Gongshang UniversityHangzhouChina
| | - Yuewen Chen
- School of Food Science and BioengineeringZhejiang Gongshang UniversityHangzhouChina
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21
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Xu Y, Chen Y, Xiang S, Ye K, Bao X, Zhu X, Ge Y, Shi L, Lin M. Effect of xylitol on gut microbiota in an in vitro colonic simulation. Turkish Journal of Biochemistry 2019. [DOI: 10.1515/tjb-2018-0328] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AbstractObjectiveXylitol has been commonly used as a sweetener and dental caries protective agent. However, how xylitol influences the composition and metabolism of gut microbiota is not known yet. This study aimed to dissect the changes of microbiota and their metabolites under xylitol supplementation in an in vitro colonic simulation.Materials and methodsA single-phase continuous fermentation model was used to culture human fecal flora and the 16s rDNA and short chain fatty acid were analyzed.Results and discussionIt was found that gut microbiota composition differentiated after xylitol supplementation only for the beginning 3 days. Xylitol significantly enhanced the relative amount of butyrate synthesizing bacteria such asClostridiumandPhascolarctobacterium. Meanwhile, xylitol increased the production of propionic acid and butyrate. An increase ofEscherichiapopulation sizes after xylitol supplementation was beyond expectation. By Spearman analysis, a positive relationship betweenEscherichiaandBifidobacteriumwas found.Conclusionxylitol can rapidly enhance the total amount of short chain fatty acids, but its influence will disappear after 3 days of fermentation. Results of this investigation can be a guideline for the further investigations on xylitol in relation to gut microbiota and the daily intake determinations.
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Affiliation(s)
- Yuanyuan Xu
- School of Food Science and Bioengineering , Zhejiang Gongshang University , Hangzhou , China
| | - Yi Chen
- School of Food Science and Bioengineering , Zhejiang Gongshang University , Hangzhou , China
| | - Shasha Xiang
- School of Food Science and Bioengineering , Zhejiang Gongshang University , Hangzhou , China
| | - Kun Ye
- School of Food Science and Bioengineering , Zhejiang Gongshang University , Hangzhou , China
| | - Xuan Bao
- School of Food Science and Bioengineering , Zhejiang Gongshang University , Hangzhou , China
| | - Xuan Zhu
- School of Food Science and Bioengineering , Zhejiang Gongshang University , No. 18 Xuezheng Str. , Hangzhou, Zhejiang Province 310018 , China
| | - Yin Ge
- School of Food Science and Bioengineering , Zhejiang Gongshang University, Zhejiang Huakang Pharmaceutical Co., Ltd. , Zhejiang Huakang, Hangzhou, Zhejiang Province , China
| | - Lihua Shi
- School of Food Science and Bioengineering , Zhejiang Gongshang University , Hangzhou , China
| | - Mengyi Lin
- School of Food Science and Bioengineering , Zhejiang Gongshang University , Hangzhou , China
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Li Z, Du Y, Xiang S, Feng B, Bian Y, Qian W, Jin J, Lin J, Weng X. Risk factors of perioperative complications and transfusion following total hip arthroplasty in systemic lupus erythematosus patients. Lupus 2019; 28:1134-1140. [PMID: 31296142 DOI: 10.1177/0961203319862609] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND In recent years, hip arthroplasty rates in systemic lupus erythematosus (SLE) patients have been increasing rapidly. Although patients with SLE generally show beneficial or desirable functional outcomes following total hip arthroplasty (THA), it has been reported that SLE patients after THA have increased risk of postoperative complications, especially during the period of hospitalization. OBJECTIVES In the present study, we aimed to identify possible factors associated with complications or transfusion of THA in SLE patients during hospitalization. METHODS The present study was a retrospective study conducted in Peking Union Medical College Hospital. Data were collected from medical records of patients who underwent THA from January 2012 to June 2018. The primary outcome variable was perioperative complications, which was defined as having one or more of the following conditions: high fever, infection, impaired wound healing, venous thrombosis of the lower extremities, hematoma, arrhythmia, implant complications. The secondary outcome was perioperative transfusion. RESULTS During January 2012 to June 2018, 100 patients had taken the surgery of THA. After multivariate analysis, independent risk factors for perioperative complications were: age ≥ 45 years (p = 0.001), SLE with other connective tissue diseases (p = 0.029), high temperature (p = 0.030), positive anti-dsDNA antibody (p = 0.043), and Systemic Lupus International Collaborative Clinics/American College of Rheumatology (SLICC/ACR) Damage Index ≥ 3 (p = 0.008). Independent risk factors for perioperative transfusion were bilateral THA (p = 0.029), low hemoglobin (p = 0.021) and abnormal renal function (p = 0.021). CONCLUSION For SLE patients following THA, age > 45 years, SLE with other connective tissue disease, high temperature, positive anti-dsDNA antibody and SLICC/ACR Damage Index ≥ 3 were the risk factors of complications during hospitalization and bilateral THA, low hemoglobin and abnormal renal function were the risk factors of transfusion.
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Affiliation(s)
- Z Li
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - Y Du
- 2 Office of Clinical Epidemiology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - S Xiang
- 3 Department of Joint Surgery, The Affiliated Hospital of Qingdao University, China
| | - B Feng
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - Y Bian
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - W Qian
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - J Jin
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - J Lin
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - X Weng
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
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Zhang Y, Xiang S, Guo X, Wen A, Hao Y. All-optical inhibitory dynamics in photonic neuron based on polarization mode competition in a VCSEL with an embedded saturable absorber. Opt Lett 2019; 44:1548-1551. [PMID: 30933087 DOI: 10.1364/ol.44.001548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
An all-optical spike inhibition scheme based on polarization-mode competition (PMC) in a vertical-cavity surface-emitting laser (VCSEL) with an embedded saturable absorber is proposed and investigated numerically. The inhibitory dynamics is characterized by spike amplitude and first-spike latency (FSL) for the first time, to the best of our knowledge. The effects of time differences between inhibitory and excitatory inputs, inputs strengths, bias current, as well as noise on the spike amplitude and FSL are examined. The results show that a spike can be triggered in the y-polarization mode by excitatory input and can be inhibited in the presence of inhibitory input due to PMC.
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Zhu X, Xiang S, Feng X, Wang H, Tian S, Xu Y, Shi L, Yang L, Li M, Shen Y, Chen J, Chen Y, Han J. Impact of Cyanocobalamin and Methylcobalamin on Inflammatory Bowel Disease and the Intestinal Microbiota Composition. J Agric Food Chem 2019; 67:916-926. [PMID: 30572705 DOI: 10.1021/acs.jafc.8b05730] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Patients with inflammatory bowel disease (IBD) are usually advised to supplement various types of vitamin B12, because vitamin B12 is generally absorbed in the colon. Thus, in the current study, the influence of cyanocobalamin (CNCBL) or methylcobalamin (MECBL) ingestion on IBD symptoms will be investigated. Then, whether and how the application of various cobalamins would modify the taxonomic and functional composition of the gut microbiome in mice will be examined carefully. Dextran-sulfate-sodium-induced IBD mice were treated with MECBL or CNCBL; disease activity index (DAI) scores and intestinal inflammatory conditions of mice were evaluated. Fecal samples were collected; microbiota composition was determined with a 16s rRNA analysis; functional profiles were predicted by phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt); and short-chain fatty acids were measured. The consequence of higher relative abundances of Enterobacteriaceae and isomeric short-chain fatty acids by cobalamin treatment revealed that a high concentration of CNCBL but not MECBL supplementation obviously aggravated IBD. A microbial ecosystem rich in Escherichia/ Shigella and low in Lactobacillus, Blautia, and Clostridium XVIII was observed in IBD mice after a high concentration of CNCBL supplementation. In cobalamin-dependent enzymes, CNCBL was more efficient in the adenosylcobalamin system than MECBL and vice versa in the MECBL system. The distinct effects of various cobalamins were associated with the distribution and efficiency of vitamin-B12-dependent riboswitches. CNCBL had a strong inhibitory effect on all riboswitches, especially on btuB and pocR riboswitches from Enterobacteriaceae. CNCBL aggravated IBD via enhancing the proportion of Enterobacteriaceae organisms through riboswitch and enzyme systems. The present study provides a critical reference for offering a suitable amount and type of cobalamin during a symbiotic condition.
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Affiliation(s)
- Xuan Zhu
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Shasha Xiang
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Xiao Feng
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Huanhuan Wang
- School of Medicine , Hangzhou Normal University , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Shiyi Tian
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Yuanyuan Xu
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Lihua Shi
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Lu Yang
- School of Medicine , Hangzhou Normal University , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Mian Li
- Zhejiang Huakang Pharmaceutical Company, Limited , Kaihua, Quzhou , Zhejiang 324302 , People's Republic of China
| | - Yubiao Shen
- Yangtze Delta Region Institute of Tsinghua University , Zhejiang , Jiaxing , 314000 , China
| | - Jie Chen
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Yuewen Chen
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
| | - Jianzhong Han
- School of Food Science and Bioengineering , Zhejiang Gongshang University , 18 Xuezheng Street , Hangzhou , Zhejiang 310018 , People's Republic of China
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Xiang S, Tang HW, Zhou J, Li XZ. Electrospinning of Hydroxypropyl-beta-cyclodextrin/Polyvinylpyrrolidone Resveratrol-loaded Nanofibers: Preparation and Characterization. Indian J Pharm Sci 2019. [DOI: 10.36468/pharmaceutical-sciences.552] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Xu Y, Xiang S, Ye K, Zheng Y, Feng X, Zhu X, Chen J, Chen Y. Cobalamin (Vitamin B12) Induced a Shift in Microbial Composition and Metabolic Activity in an in vitro Colon Simulation. Front Microbiol 2018; 9:2780. [PMID: 30505299 PMCID: PMC6250798 DOI: 10.3389/fmicb.2018.02780] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 10/30/2018] [Indexed: 12/21/2022] Open
Abstract
Cobalamin deficiency is believed to be related to disturbances in cell division, neuropathy, nervous system disease and pernicious anemia. Elderly people are usually advised to supplement their diets with cobalamin. As cobalamin has several forms, the effects of different forms of cobalamin on gut microbiota were investigated in this study. After 7 days of supplementation, methylcobalamin had reduced the diversity of gut microbiota compared to that in the control and cyanocobalamin groups. After supplementation with methylcobalamin, the percentage of Acinetobacter spp. had increased to 45.54%, while the percentages of Bacteroides spp., Enterobacteriaceae spp. and Ruminococcaceae spp. had declined to 11.15, 9.34, and 2.69%, respectively. However, cyanocobalamin had different influences on these bacteria. Both cobalamins increased the amount of short-chain fatty acids, particularly butyrate and propionic acid. The cyanocobalamin group showed increased activity of cellulase compared with that in the other two groups. According to CCA and PICRUSt analysis, methylcobalamin had a positive correlation with Pseudomonas bacteria, propionic acid, and butyrate. Methylcobalamin promoted lipid, terpenoid, and polyketide metabolism by gut bacteria, promoted the degradation of exogenous substances, and inhibited the synthesis of transcription factors and secondary metabolites. Our results indicate that the various forms of cobalamin in the food industry should be monitored and regulated, because the two types of cobalamin had different effects on the gut microbiome and on microbial metabolism, although they have equal bio-activity in humans. Given the effects of methylcobalamin on gut microbiota and microbial metabolism, methylcobalamin supplementation should be suggested as the first option.
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Affiliation(s)
- Yuanyuan Xu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Shasha Xiang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Kun Ye
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Yiqing Zheng
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Xiao Feng
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Xuan Zhu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Jie Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
| | - Yuewen Chen
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China
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Xiang S, Lian F. Effects of bushen huatan recipe on the AKT-GLUT4 insulin signal pathway of ovarian granular cells in polycystic ovarian syndrome and IVF outcomes in these infertile patients. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Shi L, Xu Y, Zhan L, Xiang S, Zhu X, Wang X, Tian S. Enhancing vitamin B12 content in co-fermented soy-milk via a Lotka Volterra model. ACTA ACUST UNITED AC 2018. [DOI: 10.1515/tjb-2017-0365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Abstract
Soybean products are popular because of its taste, digestibility, and health benefits. However, soybean lacks vitamin, mainly the low water-soluble vitamin B12. This study investigated the effects of fermentation conditions on the synthesis of vitamin B12, production of metabolites, and growth of Lactobacillus reuteri and Propionibacterium shermainii in fermented soy-milk. A Lotka Volterra model was successfully employed to describe the competition relationship between the two microorganisms under various fermentation conditions. A quadratic function between the ratio of interaction coefficients and vitamin B12 content was found. Higher vitamin B12 in soy-milk can be produced when the ratio of interaction coefficients approach to one. Compared with other fermented soybean products, fermented soy-milk contains more acetate, ethanol, and propionic acid. This study successfully demonstrated a mathematical model to enhance soy-milk vitamin B12 production.
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Affiliation(s)
- Lihua Shi
- Zhejiang Gongshang University , School of Food Science and Biotechnology , Hangzhou, Zhejiang Province , China
| | - Yuanyuan Xu
- Zhejiang Gongshang University , School of Food Science and Biotechnology , Hangzhou, Zhejiang Province , China
| | - Liangsheng Zhan
- Zhejiang Gongshang University , School of Food Science and Biotechnology , Hangzhou, Zhejiang Province , China
| | - Shasha Xiang
- Zhejiang Gongshang University , School of Food Science and Biotechnology , Hangzhou, Zhejiang Province , China
| | - Xuan Zhu
- Zhejiang Gongshang University , School of Food Science and Biotechnology , No. 18 Xuezheng Str. , Hangzhou, 310018 Zhejiang Province , China , Phone: +86-571-28008902, Fax: +86-571-28008900
| | - Xinmiao Wang
- Zhejiang Gongshang University , School of Food Science and Biotechnology , Hangzhou, Zhejiang Province , China
| | - Shiyi Tian
- Zhejiang Gongshang University , School of Food Science and Biotechnology , Hangzhou, Zhejiang Province , China
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Kern B, Budihardjo JD, Mermulla S, Quan A, Cadmi C, Lopez J, Khusheim M, Xiang S, Park J, Furtmüller GJ, Sarhane KA, Schneeberger S, Lee WPA, Hoke A, Tuffaha SH, Brandacher G. A Novel Rodent Orthotopic Forelimb Transplantation Model That Allows for Reliable Assessment of Functional Recovery Resulting From Nerve Regeneration. Am J Transplant 2017; 17:622-634. [PMID: 27500557 DOI: 10.1111/ajt.14007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/28/2016] [Accepted: 08/04/2016] [Indexed: 01/25/2023]
Abstract
Improved nerve regeneration and functional outcomes would greatly enhance the utility of vascularized composite allotransplantation (VCA) such as hand and upper extremity transplantation. However, research aimed at achieving this goal has been limited by the lack of a functional VCA animal model. We have developed a novel rat midhumeral forelimb transplant model that allows for the characterization of upper extremity functional recovery following transplantation. At the final end point of 12 weeks, we found that animals with forelimb transplantation including median, ulnar and radial nerve coaptation demonstrated significantly improved grip strength and forelimb function as compared to forelimb transplantation without nerve approximation (grip strength: 1.71N ± 0.57 vs. no appreciable recovery; IBB scale: 2.6 ± 0.7? vs. 0.8 ± 0.40; p = 0.0005), and similar recovery to nerve transection-and-repair only (grip strength: 1.71N ± 0.57 vs. 2.03 ± 0.42.6; IBB scale: 2.6 ± 0.7 vs. 2.8 ± 0.8; p = ns). Moreover, all forelimb transplant animals with nerve coaptation displayed robust axonal regeneration with myelination and reduced flexor muscle atrophy when compared to forelimb transplant animals without nerve coaptation. In conclusion, this is the first VCA small-animal model that allows for reliable and reproducible measurement of behavioral functional recovery in addition to histologic evaluation of nerve regeneration and graft reinnervation.
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Affiliation(s)
- B Kern
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD.,Department of Visceral, Transplant, and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - J D Budihardjo
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - S Mermulla
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - A Quan
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - C Cadmi
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - J Lopez
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - M Khusheim
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - S Xiang
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - J Park
- Department of Neurology and Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD
| | - G J Furtmüller
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - K A Sarhane
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - S Schneeberger
- Department of Visceral, Transplant, and Thoracic Surgery, Innsbruck Medical University, Innsbruck, Austria
| | - W P A Lee
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - A Hoke
- Department of Neurology and Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD
| | - S H Tuffaha
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
| | - G Brandacher
- Department of Plastic and Reconstructive Surgery, Vascularized Composite Allotransplantation (VCA) Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD
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Li N, Liu B, Xiang S, Shi L. Similar enhancement of BK(Ca) channel function despite different aerobic exercise frequency in aging cerebrovascular myocytes. Physiol Res 2016; 65:447-59. [PMID: 27070745 DOI: 10.33549/physiolres.933111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Aerobic exercise showed beneficial influence on cardiovascular systems in aging, and mechanisms underlying vascular adaption remain unclear. Large-conductance Ca(2+)-activated K(+) (BK(Ca)) channels play critical roles in regulating cellular excitability and vascular tone. This study determined the effects of aerobic exercise on aging-associated functional changes in BK(Ca) channels in cerebrovascular myocytes, Male Wistar rats aged 20-22 months were randomly assigned to sedentary (O-SED), low training frequency (O-EXL), and high training frequency group (O-EXH). Young rats were used as control. Compared to young rats, whole-cell BK(Ca) current was decreased, and amplitude of spontaneous transient outward currents were reduced. The open probability and Ca(2+)/voltage sensitivity of single BK(Ca) channel were declined in O-SED, accompanied with a reduction of tamoxifen-induced BK(Ca) activation; the mean open time of BK(Ca) channels was shortened whereas close time was prolonged. Aerobic exercise training markedly alleviated the aging-associated decline independent of training frequency. Exercise three times rather than five times weekly may be a time and cost-saving training volume required to offer beneficial effects to offset the functional declines of BK(Ca) during aging.
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Affiliation(s)
- N Li
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China, Department of Exercise Physiology, Beijing Sport University, Beijing, China.
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Xiang S, Fuji K, Sato S, Xiao S, Bird JP, Aoki N, Ochiai Y. Metal-insulator transition in the quasi-one-dimensional transport of fractional quantum Hall states. J Phys Condens Matter 2015; 27:202201. [PMID: 25920938 DOI: 10.1088/0953-8984/27/20/202201] [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: 06/04/2023]
Abstract
We investigate edge state transmission in quantum point contacts (QPCs) in the fractional quantum-Hall regime, finding behavior reminiscent of a metal-insulator transition. The transition is suggested by an unusual behavior of the differential conductance in the fractional-quantum-Hall regime, and by the presence of a fixed point and universal scaling in the temperature dependence of the linear conductance. Noting that the 0.7 feature evolves continuously into a last fractional plateau at high magnetic fields, we suggest that this still unresolved feature may itself be viewed as a manifestation of a local, microscopic, metal-insulator transition.
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Affiliation(s)
- S Xiang
- Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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Cupelli ET, Escallier L, Galambos N, Xiang S, Franco I. Sensory processing differences and urinary incontinence in school-aged children. J Pediatr Urol 2014; 10:880-5. [PMID: 24636484 DOI: 10.1016/j.jpurol.2014.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 05/12/2013] [Accepted: 01/03/2014] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Urinary Incontinence (UI) is a common problem among school-aged children (5-11 years). Symptoms such as urgency, diminished awareness of wetting, or apparent apathy may represent differences in sensory processing (SP). This study aims to describe the SP abilities of incontinent school-aged children with typical development to determine if they differ from established norms for continent children. MATERIALS AND METHODS The SP abilities of 209 school-aged children with UI were evaluated using the short sensory profile (SSP), a judgment-based caregiver questionnaire, then compared with established norms using descriptive and inferential statistics. RESULTS Forty-four percent of children showed significant differences in global SP with the greatest differences noted in tactile sensitivity. Higher section subscores were also noted in "seeks sensation/under responsive" and "auditory sensitivity". Children with dysfunctional voiding (DV) were more likely to show global differences (p = 0.015), differences in "seeks sensation" (p = 0.006), and auditory sensitivity (p = 0.041). The odds for low tactile sensitivity scores were five times greater for children with UI and DV (p = 0.006). CONCLUSION These results suggest that differences in SP may be found among typical school aged children with UI. Continued research is indicated to understand the significance of the study results.
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Affiliation(s)
- E T Cupelli
- Maimonides Medical Center & Pediatric Urology Associates, 909 49th Street, Brooklyn, New York 11219, NY, USA.
| | - L Escallier
- Stony Brook University HSC, Room 224, Stony Brook, New York 11794, NY, USA
| | - N Galambos
- Maimonides Medical Center & Pediatric Urology Associates, 909 49th Street, Brooklyn, New York 11219, NY, USA
| | - S Xiang
- Maimonides Medical Center & Pediatric Urology Associates, 909 49th Street, Brooklyn, New York 11219, NY, USA
| | - I Franco
- New York Medical College, Vallhalla, New York, USA; Pediatric Urology Associates, 909 49th St., Brooklyn, New York 11219, NY, USA
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Xiang S, Xiao S, Fuji K, Shibuya K, Endo T, Yumoto N, Morimoto T, Aoki N, Bird JP, Ochiai Y. On the zero-bias anomaly and Kondo physics in quantum point contacts near pinch-off. J Phys Condens Matter 2014; 26:125304. [PMID: 24599094 DOI: 10.1088/0953-8984/26/12/125304] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We investigate the linear and non-linear conductance of quantum point contacts (QPCs), in the region near pinch-off where Kondo physics has previously been connected to the appearance of the 0.7 feature. In studies of seven different QPCs, fabricated in the same high-mobility GaAs/AlGaAs heterojunction, the linear conductance is widely found to show the presence of the 0.7 feature. The differential conductance, on the other hand, does not generally exhibit the zero-bias anomaly (ZBA) that has been proposed to indicate the Kondo effect. Indeed, even in the small subset of QPCs found to exhibit such an anomaly, the linear conductance does not always follow the universal temperature-dependent scaling behavior expected for the Kondo effect. Taken collectively, our observations demonstrate that, unlike the 0.7 feature, the ZBA is not a generic feature of low-temperature QPC conduction. We furthermore conclude that the mere observation of the ZBA alone is insufficient evidence for concluding that Kondo physics is active. While we do not rule out the possibility that the Kondo effect may occur in QPCs, our results appear to indicate that its observation requires a very strict set of conditions to be satisfied. This should be contrasted with the case of the 0.7 feature, which has been apparent since the earliest experimental investigations of QPC transport.
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Affiliation(s)
- S Xiang
- Graduate School of Advanced Integration Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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Cernicchiaro N, Renter DG, Xiang S, White BJ, Bello NM. Hierarchical Bayesian modeling of heterogeneous variances in average daily weight gain of commercial feedlot cattle. J Anim Sci 2013; 91:2910-9. [PMID: 23482583 DOI: 10.2527/jas.2012-5543] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Variability in ADG of feedlot cattle can affect profits, thus making overall returns more unstable. Hence, knowledge of the factors that contribute to heterogeneity of variances in animal performance can help feedlot managers evaluate risks and minimize profit volatility when making managerial and economic decisions in commercial feedlots. The objectives of the present study were to evaluate heteroskedasticity, defined as heterogeneity of variances, in ADG of cohorts of commercial feedlot cattle, and to identify cattle demographic factors at feedlot arrival as potential sources of variance heterogeneity, accounting for cohort- and feedlot-level information in the data structure. An operational dataset compiled from 24,050 cohorts from 25 U. S. commercial feedlots in 2005 and 2006 was used for this study. Inference was based on a hierarchical Bayesian model implemented with Markov chain Monte Carlo, whereby cohorts were modeled at the residual level and feedlot-year clusters were modeled as random effects. Forward model selection based on deviance information criteria was used to screen potentially important explanatory variables for heteroskedasticity at cohort- and feedlot-year levels. The Bayesian modeling framework was preferred as it naturally accommodates the inherently hierarchical structure of feedlot data whereby cohorts are nested within feedlot-year clusters. Evidence for heterogeneity of variance components of ADG was substantial and primarily concentrated at the cohort level. Feedlot-year specific effects were, by far, the greatest contributors to ADG heteroskedasticity among cohorts, with an estimated ∼12-fold change in dispersion between most and least extreme feedlot-year clusters. In addition, identifiable demographic factors associated with greater heterogeneity of cohort-level variance included smaller cohort sizes, fewer days on feed, and greater arrival BW, as well as feedlot arrival during summer months. These results support that heterogeneity of variances in ADG is prevalent in feedlot performance and indicate potential sources of heteroskedasticity. Further investigation of factors associated with heteroskedasticity in feedlot performance is warranted to increase consistency and uniformity in commercial beef cattle production and subsequent profitability.
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Affiliation(s)
- N Cernicchiaro
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan 66506, USA
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Xiang S, Mao L, Duplessis T, Yuan L, Dauchy R, Dauchy E, Blask DE, Frasch T, Hill SM. Oscillation of clock and clock controlled genes induced by serum shock in human breast epithelial and breast cancer cells: regulation by melatonin. Breast Cancer (Auckl) 2012; 6:137-50. [PMID: 23012497 PMCID: PMC3448497 DOI: 10.4137/bcbcr.s9673] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study investigates differences in expression of clock and clock-controlled genes (CCGs) between human breast epithelial and breast cancer cells and breast tumor xenografts in circadian intact rats and examines if the pineal hormone melatonin influences clock gene and CCG expression. Oscillation of clock gene expression was not observed under standard growth conditions in vitro, however, serum shock (50% horse serum for 2 h) induced oscillation of clock gene and CCG expression in MCF-10A cells, which was repressed or disrupted in MCF-7 cells. Melatonin administration following serum shock differentially suppressed or induced clock gene (Bmal1 and Per2) and CCG expression in MCF10A and MCF-7 cells. These studies demonstrate the lack of rhythmic expression of clock genes and CCGs of cells in vitro and that transplantation of breast cancer cells as xenografts into circadian competent hosts re-establishes a circadian rhythm in the peripheral clock genes of tumor cells.
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Affiliation(s)
- S Xiang
- Department of Structural and Cellular Biology, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA 70112, USA
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Tong L, Xiang S, Mandel C, Bai Y, Manley J. Structural studies of pre-mRNA 3′-end processing. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308097092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Zhang F, Chen XP, Zhang W, Dong HH, Xiang S, Zhang WG, Zhang BX. Combined hepatocellular cholangiocarcinoma originating from hepatic progenitor cells: immunohistochemical and double-fluorescence immunostaining evidence. Histopathology 2008; 52:224-32. [PMID: 18184271 DOI: 10.1111/j.1365-2559.2007.02929.x] [Citation(s) in RCA: 136] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AIMS Combined hepatocellular cholangiocarcinoma (CHC) is a rare form of primary liver cancer, showing a mixture of hepatocellular and biliary features. Data suggest that most CHC arise from hepatic progenitor cells (HPCs). The aim was to investigate the origin of CHC. METHODS AND RESULTS Twelve cases of CHC were studied by immunohistochemistry for hepatocytic (hepPar1, alpha-fetoprotein), cholangiocytic cytokeratin [(CK) 7, CK19], hepatic progenitor cell (OV-6), haematopoietic stem cell (c-kit, CD34), as well as CD45 and chromogranin-A markers. The combination of double-fluorescence immunostaining consisted of HepPar1 with CK19, and c-kit with OV-6. All 12 cases demonstrated more or less transitional areas, with strands/trabeculae of small, uniform, oval-shaped cells including scant cytoplasm and hyperchromatic nuclei embedded within a thick, desmoplastic stroma; however, two cases were found to consist entirely of such transitional areas. Simultaneous co-expression of hepPar1 and CK7, or CK19, was demonstrated in 10/12 (83.3%) cases of CHC. c-kit expression was noted in 10/12 (83.3%) cases, of which 7/10 (70%) showed co-expression of OV-6. CONCLUSIONS The results suggest that CHC are of HPC origin, supporting the concept that human hepatocarcinogenesis may originate from the transformation of HPCs.
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Affiliation(s)
- F Zhang
- Hepatic Surgery Centre, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Yang Y, Ghiran I, Shields H, Xiang S, Fruehauf J, Upton M, LaMont T, Li C. 504 POSTER Centrosome abnormalities occur early and coexist with genomic instability during cancer progression in Barrett's esophagus. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70509-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Huang D, Yang J, Wan W, Ding F, Zhang L, Liu Y, Xiang S. Cholesteric Metallomesogens Containing Optically Active Metal-Tricarbony Moieties. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259608042230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- D. Huang
- a Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu , 610041 , P.R. China
| | - J. Yang
- a Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu , 610041 , P.R. China
| | - W. Wan
- a Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu , 610041 , P.R. China
| | - F. Ding
- a Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu , 610041 , P.R. China
| | - L. Zhang
- a Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu , 610041 , P.R. China
| | - Y. Liu
- b Department of Chemistry , Sichuan Normal University , Chengdu , 610066 , P.R. China
| | - S. Xiang
- b Department of Chemistry , Sichuan Normal University , Chengdu , 610066 , P.R. China
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Xiang S, Carter CW, Bricogne G, Gilmore CJ. Entropy maximization constrained by solvent flatness: a new method for macromolecular phase extension and map improvement. Acta Crystallogr D Biol Crystallogr 2005; 49:193-212. [PMID: 15299561 DOI: 10.1107/s0907444992008540] [Citation(s) in RCA: 14] [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] [Indexed: 11/10/2022]
Abstract
A practical generally applicable procedure for exponential modeling to maximum likelihood of macromolecular data sets constrained by a moderately large basis set of reliable phases and a molecular envelope is described, based on the computer program MICE [Bricogne & Gilmore (1990). Acta Cryst. A46, 284-297]. Procedures were first tested with simulated data sets. Exact and randomly perturbed amplitudes and phases were generated, together with a known envelope for solvent-free protein and for protein in an electron-dense crystal mother liquor typical of many real protein crystals. These experiments established useful guidelines and values for various parameters. Tests with basis sets chosen from the largest amplitudes indicate that exponential models with considerable correct extrapolated phase and amplitude information can be constructed from as few as 16% of the total number of reflections, with mean phase errors of about 30 degrees, at resolution limits of either 5 or 3 A. When the shape of the solvent channels in macromolecular crystals is known, it offers an important additional source of information. MICE was, therefore, adapted to average the density outside the molecular boundary defined by an input envelope. This flattening process imposes a uniform density distribution in solvent-filled channels as an additional constraint on the exponential model and is analogous to the treatment of solvent in conventional solvent flattening. Experimental data for cytidine deaminase, a structure recently solved by making extensive use of conventional solvent flattening, provides an example of the performance of maximum-entropy methods in a real situation and a compelling comparison of this method to standard procedures. Exponential models of the electron density constrained by the most reliable phases obtained by multiple isomorphous replacement with anomalous scattering (MIRAS) (figure of merit > 0.7, representing 34% of the total number of reflections) and by the envelope give rise to centroid electron-density maps which are quantitatively superior by numerous statistical criteria to conventionally solvent-flattened density. Similarity of these maps to the 2F(obs) - F(calc) map calculated with phases obtained after crystallographic refinement of the model implies that maximum-entropy extrapolation provides better phases for the remaining 66% of the reflections than the original centroid MIRAS distributions. Importantly, the solvent-flattened electron density, although it did permit interpretation of the map which was not readily accomplished with the MIRAS map, contains substantial errors. It is proposed that errors of this sort may account for previously noted deficiencies of the solvent-flattening method [Fenderson, Herriott & Adman (1990). J. Appl. Cryst. 23, 115-131] and for the occasional tendency of incorrect interpretations to be 'locked in' by crystallographic refinement [Brändén & Jones (1990). Nature (London), 343, 687-689, and references cited therein]. Solvent flattening with combined maximization of entropy and likelihood represents a phase-refinement path independent of atomic models, using the experimental amplitudes and the most reliable phases. It should, therefore, become a valuable and generally useful procedure in macromolecular crystal structure determination.
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Affiliation(s)
- S Xiang
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, USA
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Poskitt KJ, Marotta T, Culham G, Xiang S. MR Quantification of Flow in Children with Vein of Galen Malformations. Interv Neuroradiol 2001; 7:213-22. [PMID: 20663350 DOI: 10.1177/159101990100700305] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2001] [Accepted: 07/15/2001] [Indexed: 11/17/2022] Open
Abstract
SUMMARY Vein of Galen vascular malformations are either Vein of Galen Aneurysmal malformations (VGAMs) or Vein of Galen Aneurysmal Dilatations (VGADs). VGAMs may be of the choroidal or mural type and are fistulas associated with the precursor of the vein of Galen. The treatment of VGAMs is aimed at controlling the size of the vascular shunt since it is believed that the shunt is responsible for venous hypertension, cardiac stress, delayed development and may be so large as to damage the brain. In VGAMs as noted by Berenstein and Lasjaunias. Absolute measures of flow may contribute to our understanding of CNS disease and permit objective measures of the success or failure of therapeutic interventions (5). MR phase contrast cine angiographic techniques can be employed to measure bulk flow in intracranial vessels. Vein of Galen vascular malformations are an ideal model to measure venous flow as the draining vein is large and angiographic evaluation is limited. Thus our goal was to develop an objective non-invasive method of measuring vascular flow in VGAMs and VGADs (6) . Herein we report our experience using this technique in a group of patients with Vein of Galen vascular malformations. We also hypothesized that the degree of shunting would correlate to the degree of cardiac stress and be an indicator of optimal timing for intervention. We believe that we have succeeded in our goal to develop an objective, non-invasive method of shunt quantification using velocity encoded MR sequences. This promises new insight into the hemodynamics, natural history and treatment response of vascular malformations.
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Affiliation(s)
- K J Poskitt
- Department of Radiology, Children's Hospital, Vancouver, Canada
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Sato S, Xiang S, Raleigh DP. On the relationship between protein stability and folding kinetics: a comparative study of the N-terminal domains of RNase HI, E. coli and Bacillus stearothermophilus L9. J Mol Biol 2001; 312:569-77. [PMID: 11563917 DOI: 10.1006/jmbi.2001.4968] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [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: 11/22/2022]
Abstract
There is currently a great deal of interest in proteins that fold in a single highly cooperative step. Particular attention has been focused on elucidating the factors that govern folding rates of simple proteins. Recently, the topology of the native state has been proposed to be the most important determinant of their folding rates. Here we report a comparative study of the folding of three topologically equivalent proteins that adapt a particularly simple alpha/beta fold. The folding kinetics of the N-terminal domain of RNase HI and the N-terminal domain of the ribosomal protein L9 from Escherichia coli (eNTL9) were compared to the previously characterized N-terminal domain of L9 from Bacillus stearothermophilus (bNTL9). This 6.2 kDa protein, which is one of simplest examples of the ABCalphaD motif, folds via a two-state mechanism on the millisecond to submillisecond time scale. The RNase HI domain and bNTL9 have very similar tertiary structures but there is little similarity in primary sequence. bNTL9 and eNTL9 share the same biological function and a similar primary sequence but differ significantly in stability. Fluorescence-detected stopped-flow experiments showed that the three proteins fold in a two-state fashion. The folding rates in the absence of denaturant were found to be very different, ranging form 21 s(-1) to 790 s(-1) at 10 degrees C. The diverse folding rates appear to reflect large differences in the stability of the proteins. When compared at an isostability point, the folding rates converged to a similar value and there is a strong linear correlation between the log of the folding rate and stability for this set of proteins. These observations are consistent with the idea that stability can play an important role in dictating relative folding rates among topologically equivalent proteins.
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Affiliation(s)
- S Sato
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA
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Boren J, Lookene A, Makoveichuk E, Xiang S, Gustafsson M, Liu H, Talmud P, Olivecrona G. Binding of low density lipoproteins to lipoprotein lipase is dependent on lipids but not on apolipoprotein B. J Biol Chem 2001; 276:26916-22. [PMID: 11331277 DOI: 10.1074/jbc.m011090200] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [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: 11/06/2022] Open
Abstract
Lipoprotein lipase (LPL) efficiently mediates the binding of lipoprotein particles to lipoprotein receptors and to proteoglycans at cell surfaces and in the extracellular matrix. It has been proposed that LPL increases the retention of atherogenic lipoproteins in the vessel wall and mediates the uptake of lipoproteins in cells, thereby promoting lipid accumulation and plaque formation. We investigated the interaction between LPL and low density lipoproteins (LDLs) with special reference to the protein-protein interaction between LPL and apolipoprotein B (apoB). Chemical modification of lysines and arginines in apoB or mutation of its main proteoglycan binding site did not abolish the interaction of LDL with LPL as shown by surface plasmon resonance (SPR) and by experiments with THP-I macrophages. Recombinant LDL with either apoB100 or apoB48 bound with similar affinity. In contrast, partial delipidation of LDL markedly decreased binding to LPL. In cell culture experiments, phosphatidylcholine-containing liposomes competed efficiently with LDL for binding to LPL. Each LDL particle bound several (up to 15) LPL dimers as determined by SPR and by experiments with THP-I macrophages. A recombinant NH(2)-terminal fragment of apoB (apoB17) bound with low affinity to LPL as shown by SPR, but this interaction was completely abolished by partial delipidation of apoB17. We conclude that the LPL-apoB interaction is not significant in bridging LDL to cell surfaces and matrix components; the main interaction is between LPL and the LDL lipids.
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Affiliation(s)
- J Boren
- Wallenberg Laboratory, Göteborg University, S-41345 Göteborg, Sweden.
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Zhang X, Li L, Jung J, Xiang S, Hollmann C, Choi YS. The distinct roles of T cell-derived cytokines and a novel follicular dendritic cell-signaling molecule 8D6 in germinal center-B cell differentiation. J Immunol 2001; 167:49-56. [PMID: 11418631 DOI: 10.4049/jimmunol.167.1.49] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Germinal center-B (GC-B) cells differentiate into memory B cells and plasma cells (PC) through interaction with T cells and follicular dendritic cells (FDC). Activated T cell and FDC play distinct roles in this process. The detailed kinetic experiments revealed that cytokines secreted by activated T cells determined the pathway of GC-B cell differentiation. IL-4 directs GC-B cells to differentiate into memory B cells, whereas IL-10 steers them into PC. FDC/HK cells do not direct either pathway, but provide signals for proliferation of GC-B cells. A novel FDC-signaling molecule 8D6 (FDC-SM-8D6) produced by FDC augments PC generation in the GC. FDC-SM-8D6-specific mAb blocked PC generation and IgG secretion but not memory B cell proliferation. COS cells expressing FDC-SM-8D6 enhanced GC-B cell proliferation and Ab secretion, which was blocked by mAb 8D6. In the cultures with B cell subsets, PC generation was inhibited by mAb 8D6 in the cultures with CD27(+) B cells but not in the culture with CD27(-) B cells, suggesting that CD27(+) PC precursor is the specific target of FDC-SM-8D6 stimulation.
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Affiliation(s)
- X Zhang
- Laboratory of Cellular Immunology, Alton Ochsner Medical Foundation, New Orleans, LA 70121, USA
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Abstract
BACKGROUND Molybdenum cofactor (Moco) biosynthesis is an evolutionarily conserved pathway present in archaea, eubacteria, and eukaryotes. In humans, genetic abnormalities in the biosynthetic pathway result in Moco deficiency, which is accompanied by severe neurological symptoms and death shortly after birth. The Escherichia coli MoeA and MogA proteins are involved in the final step of Moco biosynthesis: the incorporation of molybdenum into molybdopterin (MPT), the organic pyranopterin moiety of Moco. RESULTS The crystal structure of E. coli MoeA has been refined at 2 A resolution and reveals that the highly elongated MoeA monomer consists of four clearly separated domains, one of which is structurally related to MogA, indicating a divergent evolutionary relationship between both proteins. The active form of MoeA is a dimer, and a putative active site appears to be localized to a cleft formed between domain II of the first monomer and domains III and IV of the second monomer. CONCLUSIONS In eukaryotes, MogA and MoeA are fused into a single polypeptide chain. The corresponding mammalian protein gephyrin has also been implicated in the anchoring of glycinergic receptors to the cytoskeleton at inhibitory synapses. Based on the structures of MoeA and MogA, gephyrin is surmised to be a highly organized molecule containing at least five domains. This multidomain arrangement could provide a structural basis for its functional diversity. The oligomeric states of MoeA and MogA suggest how gephyrin could assemble into a hexagonal scaffold at inhibitory synapses.
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Affiliation(s)
- S Xiang
- Department of Physiology and Biophysics, State University of New York at Stony Brook, 11794, USA
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Hori M, Xiang S, Qi CF, Chattopadhyay SK, Fredrickson TN, Hartley JW, Kovalchuk AL, Bornkamm GW, Janz S, Copeland NG, Jenkins NA, Ward JM, Morse HC. Non-Hodgkin Lymphomas of Mice. Blood Cells Mol Dis 2001; 27:217-22. [PMID: 11358382 DOI: 10.1006/bcmd.2000.0375] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/22/2022]
Abstract
Studies of lymphoid neoplasms occurring in normal or genetically engineered mice have revealed parallels and differences to non-Hodgkin lymphomas (NHL) of humans. Some mouse lymphomas have strong histologic similarities to the human NHL subsets including precursor B- and T-cell lymphoblastic, small lymphocytic, splenic marginal zone, and diffuse large-cell B-cell lymphomas (DLCL); whether molecular parallels also exist is under study. Others mouse types such as sIg+ lymphoblastic B-cell lymphoma have no histologic equivalent in human NHL even though they share molecular deregulation of BCL6 with human DLCL. Finally, Burkitt lymphoma does not appear to occur naturally in mice, but it can be induced with appropriately engineered transgenes.
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Affiliation(s)
- M Hori
- Laboratory of Immunopathology, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland 20892, USA
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Zhao Y, Chen Z, Saxer C, Shen Q, Xiang S, de Boer JF, Nelson JS. Doppler standard deviation imaging for clinical monitoring of in vivo human skin blood flow. Opt Lett 2000; 25:1358-60. [PMID: 18066216 DOI: 10.1364/ol.25.001358] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We used a novel phase-resolved optical Doppler tomographic (ODT) technique with very high flow-velocity sensitivity (10microm/s) and high spatial resolution (10microm) to image blood flow in port-wine stain (PWS) birthmarks in human skin. In addition to the regular ODT velocity and structural images, we use the variance of blood flow velocity to map the PWS vessels. Our device combines ODT and therapeutic systems such that PWS blood flow can be monitored in situ before and after laser treatment. To the authors' knowledge this is the first clinical application of ODT to provide a fast semiquantitative evaluation of the efficacy of PWS laser therapy in situ and in real time.
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Xie L, Pang R, Jin Y, Xiang S, Li H. Effects of hepatic artery chemotherapeutic embolization combined with perfusing LAK cells into hepatic artery after radical operation of liver cancer. Zhonghua Gan Zang Bing Za Zhi 2000; 8:142-3. [PMID: 10880159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVE To evaluate the effects of hepatic artery chemotherapeutic embolization combined with perfusing LAK cells/interleukin 2 into hepatic artery after radical operation of liver cancer. METHODS Random divide 42 cases into two groups who had accepted radical operation of liver cancer: 21 cases who accepted hepatic artery chemotherapeutic embolization combined with perfusing LAK cells/interleukin 2 into hepatic artery as observing group, 21 cases accepted simply hepatic artery chemotherapeutic embolization as control group. RESULTS The intrahepatic recurrence rates of 1, 2, and 3 years were 0, 19.05%, 57.14% in observing group, lower than 28.57%, 47.62%, 85.71% of control group (chi(2)=4.86, 3. 86 and 4.20 respectively, P<0.05). The survival rates of 2 and 3 years were 85.71%, 61.90% in observing group, higher than 57.14%, 28. 57% of control group (chi(2)=4.20 and 4.71, P<0.05). CONCLUSION Hepatic artery chemotherapeutic embolization combined with perfusing LAK cells/interleukin 2 into hepatic artery is an effective therapeutic method to control intrahepatic recurrence rates and raise the survival rates of the patients.
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Affiliation(s)
- L Xie
- The First Affiliated Hospital of Kunming Medical College, Kunming 650031, China
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Zhao Y, Chen Z, Saxer C, Xiang S, de Boer JF, Nelson JS. Phase-resolved optical coherence tomography and optical Doppler tomography for imaging blood flow in human skin with fast scanning speed and high velocity sensitivity. Opt Lett 2000; 25:114-6. [PMID: 18059800 DOI: 10.1364/ol.25.000114] [Citation(s) in RCA: 329] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We have developed a novel phase-resolved optical coherence tomography (OCT) and optical Doppler tomography (ODT) system that uses phase information derived from a Hilbert transformation to image blood flow in human skin with fast scanning speed and high velocity sensitivity. Using the phase change between sequential scans to construct flow-velocity imaging, this technique decouples spatial resolution and velocity sensitivity in flow images and increases imaging speed by more than 2 orders of magnitude without compromising spatial resolution or velocity sensitivity. The minimum flow velocity that can be detected with an axial-line scanning speed of 400 Hz and an average phase change over eight sequential scans is as low as 10 microm/s, while a spatial resolution of 10 microm is maintained. Using this technique, we present what are to our knowledge the first phase-resolved OCT/ODT images of blood flow in human skin.
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Li G, Liu W, Yu X, Xiang S, Lin L, He H, Yu Q. [The development of Model Cihang-2000 mini multi-function electrocardiograph]. Zhongguo Yi Liao Qi Xie Za Zhi 1998; 22:133-136. [PMID: 12016780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The Model Cihang-2000 mini multi-function electrocardiograph is introduced in this paper. A lot of advanced electronic techniques and data processing techniques are used in this instrument. It is not only high in quality and small in size, but also strong in function.
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