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Pan B, Pan Y, Wang S, Bai Y, Hu X, Yang Y, Wu L, Liu J. Corrigendum to "ANXA2 and Rac1 negatively regulates autophagy and osteogenic differentiation in osteosarcoma cells to confer CDDP resistance" [Biochem. Biophys. Res. Commun. 676 (2023) 198-206]. Biochem Biophys Res Commun 2024; 719:149924. [PMID: 38761632 DOI: 10.1016/j.bbrc.2024.149924] [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: 05/20/2024]
Affiliation(s)
- Baolong Pan
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yanyu Pan
- College of Basic Medical Sciences, Naval Medical University, Shanghai, 200433, China
| | - Shuangneng Wang
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yingying Bai
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Xuemei Hu
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yang Yang
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Ling Wu
- Department of Blood Composition Production, Central Blood Station of Yuxi City, Yuxi, 653100, Yunnan, China.
| | - Jianping Liu
- Research Management Department, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China.
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Pan B, Pan Y, Wang S, Bai Y, Hu X, Yang Y, Wu L, Liu J. Corrigendum to "ANXA2 and Rac1 negatively regulates autophagy and osteogenic differentiation in osteosarcoma cells to confer CDDP resistance" [Biochem. Biophys. Res. Commun. 676 (2023) 198-206]. Biochem Biophys Res Commun 2024; 704:149487. [PMID: 38401302 DOI: 10.1016/j.bbrc.2024.149487] [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: 02/26/2024]
Affiliation(s)
- Baolong Pan
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yanyu Pan
- College of Basic Medical Sciences, Naval Medical University, Shanghai, 200433, China
| | - Shuangneng Wang
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yingying Bai
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Xuemei Hu
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yang Yang
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Ling Wu
- Department of Blood Composition Production, Central Blood Station of Yuxi City, Yuxi, 653100, Yunnan, China.
| | - Jianping Liu
- Research Management Department, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China.
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Bai Y, Miao Y, Wang J, Gan J, Feng J. Predictive Value and Immunological Role of the HSPA5 Gene in Cervical Cancer. Biochem Genet 2024:10.1007/s10528-024-10782-w. [PMID: 38584219 DOI: 10.1007/s10528-024-10782-w] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 03/11/2024] [Indexed: 04/08/2024]
Abstract
Cervical cancer (CC) ranks fourth among women's malignancies worldwide and seriously affects women's health. HSPA5 is a heat shock protein, also known as glucose regulatory protein 78 (GRP78). Upregulation of HSPA5 has been reported to be closely associated with multiple types of tumors. However, the specific role of HSPA5 in cervical cancer has not been discovered. In our study, we explored the prognostic value of HSPA5 in CC. Here, we analyzed the (TCGA) and (UCSC) databases, the analysis of HSPA5 in many tumors types was conducted with the "wilcox. test" method. A False Discovery Rate (FDR) value < 0.05 and Log2 | (fold change, FC) |> 1 were set as the cutoffs. "*", "**", and "***" indicate FDR < 0.05, < 0.01, and < 0.001, respectively, and further used human cervical cancer cells for q-PCR and western blotting detection. q-PCR and western blotting results showed that HSPA5 was highly expressed in cervical cancer cells, while it was expressed at low levels in normal cells (P < 0.05).We also analyzed the immunohistochemical data. immunohistochemical analysis results showed that HSPA5 was highly expressed in human cervical cancer, while it was expressed at low levels in normal tissues (P < 0.05). Analysis in TCGA-UCSC showed that the proportion of G3 in the group with high expression of HSPA5 was relatively high (P < 0.05). Enrichment analysis and survival analysis showed that the increased expression of HSPA5 in cervical cancer was related to the survival of CC and was involved in the regulation of biological behavior and molecular signaling pathways of cervical cancer. The correlation analysis of immune checkpoint and immune infiltration showed that HSPA5 was involved in the regulation of immune process of cervical cancer (P < 0.05). Drug sensitivity correlation analysis showed that HSPA5 was a sensitive target for tumor drugs (P < 0.05). In brief, those results suggest that HSPA5 can act as an oncogene of CC development and can serve as an effective predictive biomarker in cervical cancer.
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Affiliation(s)
- Yingying Bai
- Department of Gynecology and Obstetrics, Tangdu Hospital, Air Force Medical University, 569Xinsi Road, Baqiao District, Xian, 710038, Shanxi, China
| | - Yandong Miao
- Cancer Center, Yantai Affiliated Hospital of Binzhou Medical University, The 2nd Medical College of Binzhou Medical University, Yantai, 264100, China
| | - Jiangtao Wang
- Department of General Surgery, Yantai Affiliated Hospital of Binzhou Medical University, The Second Clinical Medical College of Binzhou Medical University, Yantai, 264000, China
| | - Jian Gan
- Department of General Surgery, Yantai Affiliated Hospital of Binzhou Medical University, The Second Clinical Medical College of Binzhou Medical University, Yantai, 264000, China
| | - Jiang Feng
- Department of Gynecology and Obstetrics, Tangdu Hospital, Air Force Medical University, 569Xinsi Road, Baqiao District, Xian, 710038, Shanxi, China.
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Bai Y, Wang L, Xu R, Cui Y. Mesenchymal stem cells with p38 mitogen-activated protein kinase interference ameliorate mouse ischemic stroke. Exp Biol Med (Maywood) 2023; 248:2481-2491. [PMID: 38158804 PMCID: PMC10903255 DOI: 10.1177/15353702231220663] [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: 05/02/2023] [Accepted: 10/23/2023] [Indexed: 01/03/2024] Open
Abstract
Mesenchymal stem cells (MSCs) have been widely used in the treatment of ischemic stroke. However, factors such as high glucose, oxidative stress, and aging can lead to the reduced function of donor MSCs. The p38 mitogen-activated protein kinase (MAPK) signaling pathway is associated with various functions, such as cell proliferation, apoptosis, senescence, differentiation, and paracrine secretion. This study examined the hypothesis that the downregulation of p38 MAPK expression in MSCs improves the prognosis of mice with ischemic stroke. Lentiviral vector-mediated short hairpin RNA (shRNA) was constructed to downregulate the expression level of p38 MAPK in mouse bone marrow-derived MSCs. The growth cycle, apoptosis, and senescence of MSCs after infection were examined. A mouse model of ischemic stroke was constructed. After MSC transplantation, the recovery of neurological function in the mice was evaluated. Lentivirus-mediated shRNA significantly downregulated the mRNA and protein expression levels of p38 MAPK. The senescence of MSCs in the p38 MAPK downregulation group was significantly reduced, but the growth cycle and apoptosis did not significantly change. Compared with the control group, the infarct volume was reduced, and the neurological function and the axonal remodeling were improved in mice with ischemic stroke after transplantation of MSCs with downregulated p38 MAPK. Immunohistochemistry confirmed that in the p38 MAPK downregulation group, apoptotic cells were reduced, and the number of neuronal precursors and the formation of white matter myelin were increased. In conclusion, downregulation of p38 MAPK expression in MSCs improves the therapeutic effect in mice with ischemic stroke, an effect that may be related to a reduction in MSC senescence. This method is expected to improve the efficacy of MSCs in patients, especially in patients with underlying diseases such as diabetes, thus providing a basis for clinical individualized treatment for cerebral infarction.
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Affiliation(s)
- Yingying Bai
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
| | - Lishan Wang
- Department of General Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing 210009, China
| | - Rong Xu
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
| | - Ying Cui
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China
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Fang ZY, Wang H, Wang YB, Sun T, Cao F, Bai YY. [Hypertrophic cardiomyopathy complicating with ventricular tachycardia induced by MYBPC3 and RYR2 double gene mutations: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:1087-1089. [PMID: 37859363 DOI: 10.3760/cma.j.cn112148-20230531-00318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Affiliation(s)
- Z Y Fang
- Department of Cardiology, Second Medical Center, Chinese People's Liberation Army General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing 100853, China
| | - H Wang
- Department of Cardiology, Second Medical Center, Chinese People's Liberation Army General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing 100853, China
| | - Y B Wang
- Department of Cardiology, Second Medical Center, Chinese People's Liberation Army General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing 100853, China
| | - T Sun
- Department of Cardiology, Second Medical Center, Chinese People's Liberation Army General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing 100853, China
| | - F Cao
- Department of Cardiology, Second Medical Center, Chinese People's Liberation Army General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing 100853, China
| | - Y Y Bai
- Department of Cardiology, Second Medical Center, Chinese People's Liberation Army General Hospital, National Clinical Research Center for Geriatric Diseases, Beijing 100853, China
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Bai Y, Wang W, Cheng Y, Yang Y. Research progress on the GRP78 gene in the diagnosis, treatment and immunity of cervical cancer. Eur J Med Res 2023; 28:447. [PMID: 37858217 PMCID: PMC10588224 DOI: 10.1186/s40001-023-01241-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 07/22/2023] [Indexed: 10/21/2023] Open
Abstract
BACKGROUND GRP78 is a molecular chaperone protein in the endoplasmic reticulum that is involved in protein assembly and quality control, and it participates in ER stress regulation of endoplasmic reticulum stress pathways. Studies have confirmed that GRP78 gene is highly expressed in a variety of tumors and is involved in different biological functions. PURPOSE The present review highlights the involvement of the GRP78 gene in regulating the development of cervical cancer by promoting the proliferation and invasion of cervical cancer cells as well as by inhibiting apoptosis and promoting the Warburg effect. High expression of GRP78 is positively correlated with chemotherapy resistance in cervical cancer. GRP78 plays an anticancer role in cervical cancer by regulating autophagy and apoptosis. Mediated immune CD8 + T cells regulate tumor cell immunity and play a role in the application of the HPV vaccine. CONCLUSIONS GRP78 plays a multifunctional role in cervical cancer and has important therapeutic and diagnostic value.
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Affiliation(s)
- Yingying Bai
- Department of Gynecology and obstetrics, Tangdu Hospital, Air Force Medical University, 569Xinsi Road, Baqiao District, Xian, 710038 China
| | - Wenhua Wang
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, People’s Republic of China
| | - Yuemei Cheng
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, People’s Republic of China
| | - Yongxiu Yang
- Department of Gynecology and obstetrics, Tangdu Hospital, Air Force Medical University, 569Xinsi Road, Baqiao District, Xian, 710038 China
- Department of Obstetrics and Gynecology, First Hospital of Lanzhou University, Lanzhou, Gansu People’s Republic of China
- No.1, Dong gang West Road, Cheng guan District, Lanzhou, Gansu People’s Republic of China
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Pan B, Pan Y, Wang S, Bai Y, Hu X, Yang Y, Wu L, Liu J. ANXA2 and Rac1 negatively regulates autophagy and osteogenic differentiation in osteosarcoma cells to confer CDDP resistance. Biochem Biophys Res Commun 2023; 676:198-206. [PMID: 37536195 DOI: 10.1016/j.bbrc.2023.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/19/2023] [Accepted: 07/03/2023] [Indexed: 08/05/2023]
Abstract
BACKGROUND Cisplatin (CDDP) is a mainstay chemotherapeutic agent for OS treatment, but drug resistance has become a hurdle to limit its clinical effect. Autophagy plays an important role in CDDP resistance in OS, and in the present study we explored the role of ANXA2 and Rac1 in dictating CDDP sensitivity in OS cells. METHODS ANXA2 and Rac1 expression levels were examined by Western blot and autophagy induction was detected by transmission electron miscroscope (TEM) in the clinical samples and OS cell lines. CDDP resistant cells were established by exposing OS cells to increasing doses of CDDP. The effects of ANXA2 and Rac1 knockdown on CDDP sensitivity were evaluated in the cell and animal models. RESULTS Reduced autophagy was associated with the increased expression of ANXA2 and Rac1 in CDDP resistant OS tumor samples and cells. Autophagy suppression promoted CDDP resistance and inducing autophagy re-sensitized the resistant cells to CDDP treatment in vitro and in vivo. Further, knocking down ANXA2 or Rac1 re-activated autophagy and attenuated CDDP resistance in OS cells. We further demonstrated that CDDP resistant OS cells displayed a poorer osteogenic differentiation state when compared to the parental cell lines, which was significantly reversed by autophagy re-activation and ANXA2 or Rac1 silencing. CONCLUSION Our findings revealed a complicated interplay of ANXA2/Rac1, autophagy induction, and osteogenic differentiation in dictating CDDP resistance in OS cells, suggesting ANXA2 and Rac1 as promising targets to modulate autophagy and overcome CDDP resistance in OS cells.
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Affiliation(s)
- Baolong Pan
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yanyu Pan
- College of Basic Medical Sciences, Naval Medical University, Shanghai, 200433, China
| | - Shuangneng Wang
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yingying Bai
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Xuemei Hu
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Yang Yang
- Health Examination Center, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China
| | - Ling Wu
- Department of Blood Composition Production, Central Blood Station of Yuxi City, Yuxi, 653100, Yunnan, China.
| | - Jianping Liu
- Research Management Department, Sixth Affiliated Hospital of Kunming Medical University, Yuxi, 653100, Yunnan, China.
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Song W, Bai YY, Hu JH, Li LL, He WW, Liu CC, Li L, Ning X, Zhu LN, Cui XL, Chen B, Wang TY, Su KX, Miao YX, Luo YE, Sheng QL, Yue TL. Lactobacillus coryniformis subsp . torquens inhibits bone loss in obese mice via modification of the gut microbiota. Food Funct 2023; 14:4522-4538. [PMID: 37062959 DOI: 10.1039/d2fo03863c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
High-fat diet (HFD)-induced obesity results in bone loss associated with an imbalanced gut microbiota and altered immune status. Probiotics are live microorganisms that are beneficial to the host and are important in maintaining bone health and gut homeostasis. In this study, the probiotic Lactobacillus coryniformis subsp. torquens (T3L) was isolated from traditional yak milk cheese produced in Lhasa and showed distinct acid and bile salt resistance as potential probiotics. Our data indicated that T3L not only reversed HFD-induced gut dysbiosis, as indicated by decreased Firmicutes-to-Bacteroidetes ratios but also reduced bone loss. The anti-obesity, microbiome-modulating, and bone-protective effects were transmissible via horizontal faeces transfer from T3L-treated mice to HFD-fed mice. The protective effects of T3L on bone mass were associated with regulatory T (Treg) cell-mediated inhibition of osteoclast differentiation. Our data indicate that T3L is a regulator of the gut microbiota and bone homeostasis in an animal model.
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Affiliation(s)
- W Song
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - Y Y Bai
- School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, 226-8501, Japan
| | - J H Hu
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - L L Li
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - W W He
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - C C Liu
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - L Li
- Department of Food Science and Technology, Harbin Institute of Technology, Harbin, 150000, China
- National Local Joint Laboratory of Extreme Environmental Nutritional Molecule Synthesis Transformation and Separation, Harbin, 150000, China
| | - X Ning
- Department of Food Science and Technology, Harbin Institute of Technology, Harbin, 150000, China
- National Local Joint Laboratory of Extreme Environmental Nutritional Molecule Synthesis Transformation and Separation, Harbin, 150000, China
| | - L N Zhu
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - X L Cui
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - B Chen
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - T Y Wang
- Department of Food Science and Technology, Harbin Institute of Technology, Harbin, 150000, China
- National Local Joint Laboratory of Extreme Environmental Nutritional Molecule Synthesis Transformation and Separation, Harbin, 150000, China
| | - K X Su
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - Y X Miao
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - Y E Luo
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - Q L Sheng
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
| | - T L Yue
- College of Food Science and Technology, Northwest University, Xi'an, 710069, China.
- Laboratory of Nutritional and Healthy Food-Individuation Manufacturing Engineering, Xi'an, 710069, China
- Research Center of Food Safety Risk Assessment and Control, Xi'an, 710069, China
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Zhang C, Quan Y, Bai Y, Yang L, Yang Y. The effect and apoptosis mechanism of 6-methoxyflavone in HeLa cells. Biomarkers 2022; 27:470-482. [PMID: 35400257 DOI: 10.1080/1354750x.2022.2062448] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Tumor cell apoptosis is a crucial indicator for judging the antiproliferative effects of anti-cancer drugs. The detection of optical and macromolecular biomarkers is the most common method for assessing the level of apoptosis. We aimed to explore the anti-tumor mechanisms of 6-methoxyflavone. MATERIAL AND METHODS Three optical methods, including the percentage of apoptotic cells, cell morphology, and subcellular ultrastructure changes, were obtained using flow cytometry, inverted fluorescence microscopy, and transmission electron microscope imaging. The mRNA or protein expression of macromolecular biomarkers related to common apoptotic pathways was determined via polymerase chain reactions or western blot assays. The functional role of the core gene biomarker was investigated through overexpression, knockdown, and phosphorylation inhibitor (GSK2656157). RESULTS Transcriptome sequencing and the optical biomarkers assays demonstrated that 6-methoxyflavone could induce apoptosis in HeLa cells. The expression of macromolecular biomarkers indicated that 6-methoxyflavone induced apoptosis through the PERK/EIF2α/ATF4/CHOP pathway. Phosphorylated PERK was identified as the core biomarker of this pathway. Both overexpression and GSK2656157 significantly altered the expression level of phosphorylated PERK in 6-methoxyflavone-treated HeLa cells. DISCUSSION AND CONCLUSION Macromolecular biomarkers such as phosphorylated PERK and phosphorylated EIF2α are of great significance for assessing the therapeutic effects of 6-methoxyflavone.
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Affiliation(s)
- Chaihong Zhang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, China
| | - Yuchong Quan
- College of Basic Medicine, Dalian Medical University, Dalian, China
| | - Yingying Bai
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, China
| | - Lijuan Yang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, China
| | - Yongxiu Yang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, China.,Department of Obstetrics and Gynecology, First Hospital of Lanzhou University, Lanzhou, China
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10
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Geng C, Wang S, Li Z, Xu P, Bai Y, Zhou Y, Zhang X, Li Y, Zhang J, Zhang H. Resting-State Functional Network Topology Alterations of the Occipital Lobe Associated With Attention Impairment in Isolated Rapid Eye Movement Behavior Disorder. Front Aging Neurosci 2022; 14:844483. [PMID: 35431890 PMCID: PMC9012114 DOI: 10.3389/fnagi.2022.844483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 02/11/2022] [Indexed: 11/13/2022] Open
Abstract
PurposeThis study investigates the topological properties of brain functional networks in patients with isolated rapid eye movement sleep behavior disorder (iRBD).Participants and MethodsA total of 21 patients with iRBD (iRBD group) and 22 healthy controls (HCs) were evaluated using resting-state functional MRI (rs-fMRI) and neuropsychological measures in cognitive and motor function. Data from rs-fMRI were analyzed using graph theory, which included small-world properties, network efficiency, network local efficiency, nodal shortest path, node efficiency, and network connectivity, as well as the relationship between behavioral characteristics and altered brain topological features.ResultsRey-Osterrieth complex figure test (ROCFT-copy), symbol digital modalities test (SDMT), auditory verbal learning test (AVLT)-N1, AVLT-N2, AVLT-N3, and AVLT-N1-3 scores were significantly lower in patients with iRBD than in HC (P < 0.05), while trail making test A (TMT-A), TMT-B, and Unified Parkinson’s Disease Rating Scale Part-III (UPDRS-III) scores were higher in patients with iRBD (P < 0.05). Compared with the HCs, patients with iRBD had no difference in the small-world attributes (P > 0.05). However, there was a significant decrease in network global efficiency (P = 0.0052) and network local efficiency (P = 0.0146), while an increase in characteristic path length (P = 0.0071). There was lower nodal efficiency in occipital gyrus and nodal shortest path in frontal, parietal, temporal lobe, and cingulate gyrus. Functional connectivities were decreased between the nodes of occipital with the regions where they had declined nodal shortest path. There was a positive correlation between TMT-A scores and the nodal efficiency of the right middle occipital gyrus (R = 0.602, P = 0.014).ConclusionThese results suggest that abnormal behaviors may be associated with disrupted brain network topology and functional connectivity in patients with iRBD and also provide novel insights to understand pathophysiological mechanisms in iRBD.
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Affiliation(s)
- Chaofan Geng
- Henan University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Shenghui Wang
- Department of Neurology, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Zhonglin Li
- Department of Radiology, Zhengzhou University People’s Hospital, Zhengzhou, China
| | - Pengfei Xu
- Henan University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Yingying Bai
- Department of Neurology, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Yao Zhou
- Department of Neurology, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Xinyu Zhang
- Department of Neurology, Henan Provincial People’s Hospital Affiliated to Xinxiang Medical University, Zhengzhou, China
| | - Yongli Li
- Department of Functional Imaging, Henan Key Laboratory for Medical Imaging of Neurological Diseases, Zhengzhou, China
| | - Jiewen Zhang
- Department of Neurology, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
| | - Hongju Zhang
- Henan University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Department of Neurology, Zhengzhou University People’s Hospital, Henan Provincial People’s Hospital, Zhengzhou, China
- Department of Neurology, Henan Provincial People’s Hospital Affiliated to Xinxiang Medical University, Zhengzhou, China
- *Correspondence: Hongju Zhang,
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11
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Zhang C, Quan Y, Yang L, Bai Y, Yang Y. 6-Methoxyflavone induces S-phase arrest through the CCNA2/CDK2/p21CIP1 signaling pathway in HeLa cells. Bioengineered 2022; 13:7277-7292. [PMID: 35246013 PMCID: PMC8973872 DOI: 10.1080/21655979.2022.2047496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This study aimed to elucidate the specific anticancer mechanism of 6-methoxyflavone in HeLa cells. A total of 178 putative targets of 6-methoxyflavone were obtained from the PharmMapper database. Microarray analyses, transcriptome sequencing analyses, functional enrichment analyses, and gene set enrichment analyses were performed to preliminarily explore the roles and mechanisms of the 178 targets in cervical cancer. Cell counting kit-8, cell cycle assays, polymerase chain reactions, and western blotting were used to clarify the mechanism of action of 6-methoxyflavone. Molecular docking and noncovalent interaction analyses were performed to further confirm the mechanism of action in three-dimensional structures. Functional enrichment analyses and gene set enrichment analyses indicated that high mRNA expression of cyclin A2 (CCNA2) and cyclin-dependent kinase 2 (CDK2) stimulated cell cycle progression in cervical cancer. Cell proliferation and cycle assays, transcriptome sequencing, polymerase chain reactions, and western blotting revealed that 6-methoxyflavone inhibited HeLa cell proliferation and induced S-phase arrest via the CCNA2/CDK2/ cyclin-dependent kinase inhibitor 1A (p21CIP1) pathway. Molecular docking and noncovalent interaction analyses showed that 6-methoxyflavone had the strongest affinity toward, inhibitory effect on, and noncovalent interactions with CDK2, and that the combination of CDK2 and CCNA2 enhanced these effects. An analysis of clinical characteristics showed that 6-methoxyflavone might be related to six clinicopathological parameters of cervical cancer patients. 6-Methoxyflavone induces S-phase arrest in HeLa cells via the CCNA2/CDK2/p21CIP1 pathway.
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Affiliation(s)
- Chaihong Zhang
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu, China
| | - Yuchong Quan
- College of Basic Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Lijuan Yang
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu, China
| | - Yingying Bai
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu, China
| | - Yongxiu Yang
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China.,Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu, China.,Department of Obstetrics and Gynecology, First Hospital of Lanzhou University, Lanzhou, Gansu, China
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12
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Yang L, Bai Y, Zhang C, Du J, Cheng Y, Wang Q, Zhang B, Yang Y. Overexpression of BMP9 promotes ovarian cancer progression via Notch1 signaling. Neoplasma 2021; 68:1190-1200. [PMID: 34533030 DOI: 10.4149/neo_2021_210326n404] [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] [Received: 03/26/2021] [Accepted: 06/18/2021] [Indexed: 11/08/2022]
Abstract
Cell proliferation and migration play important parts in ovarian cancer progression. BMP9, as one of the members of the TGF-β superfamily and BMP family, plays a diverse and significant array of biological roles, including cell differentiation, proliferation, apoptosis, tumorigenesis, and metabolism. However, the role and mechanism of BMP9 in ovarian cancer progression remains uncertain. We found that the expression of BMP9 was increased in human ovarian cancer cell lines, which induced Notch1 intracellular domain (NICD1) accumulation. And we also found the expression abundance of BMP9 is low in ovarian cancer cells. Thus, we generated recombinant adenoviruses overexpressing BMP9 to perform the research. We found that overexpression of BMP9 promoted ovarian cancer cell proliferative viability, cell cycle progression, cell migration in vitro, and accelerated subcutaneous tumor growth in vivo, which was inhibited by dominant-negative mutant Notch1 recombinant adenoviruses. Besides, we also demonstrated that silencing BMP9 by recombinant adenoviruses inhibited ovarian cancer cell viability and migration in vitro. Additionally, BMP9-induced ovarian cancer cell progression also involved the elevation of HES2, c-Myc, MMP9, and Cyclin D1, as well as repressed expression of p27. Together, these results revealed that BMP9 acts as a promoting factor in ovarian cancer progression, and overexpression of BMP9 promotes ovarian cancer progression and growth via Notch1 signaling. Thereby our research may provide new insight into the pathogenesis of ovarian cancer and BMP9-Notch1 signaling may serve as a novel therapeutic target axis for ovarian cancer treatment.
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Affiliation(s)
- Lijuan Yang
- The First Clinical Medical College of Lanzhou University, Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu , China.,Molecular Oncology Laboratory, Department of Orthopedics Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, Illinois, United States
| | - Yingying Bai
- The First Clinical Medical College of Lanzhou University, Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu , China
| | - Chaihong Zhang
- The First Clinical Medical College of Lanzhou University, Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu , China
| | - Junhong Du
- The First Clinical Medical College of Lanzhou University, Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu , China
| | - Yuemei Cheng
- The First Clinical Medical College of Lanzhou University, Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu , China
| | - Qinganzi Wang
- The First Clinical Medical College of Lanzhou University, Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu , China
| | - Bo Zhang
- Department of Orthopedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yongxiu Yang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Lanzhou University, Key Laboratory of Gynecological Oncology of Gansu Province, Lanzhou, Gansu, China
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13
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Bai Y, Yang L, Zhang C, Yang Y. Studies on the Mechanism of Alloimperatorin on the Proliferation and Apoptosis of HeLa Cells. J Oncol 2021; 2021:6617312. [PMID: 33897778 PMCID: PMC8052160 DOI: 10.1155/2021/6617312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 03/12/2021] [Accepted: 03/23/2021] [Indexed: 01/01/2023]
Abstract
Alloimperatorin is a compound extracted from the traditional Chinese medicine (Angelica dahurica), which has exhibited anticancer activity. However, its precise molecular mechanism of anticancer remains unclear. Alloimperatorin-induced apoptosis of cervical cancer cells and its molecular mechanism were investigated in the present study. Cholecystokinin octapeptide (CCK-8) was employed to evaluate the cytotoxicity of alloimperatorin on HeLa, SiHa, and MS-751 cells. Flow cytometry was used to assess apoptosis induced by alloimperatorin. The mechanism of apoptosis was verified by mitochondrial membrane potential, Western blotting, and fluorescent PCR. The results of the study showed that alloimperatorin reduced the activity of HeLa cells. The calculated IC50 at 48 hours was 116.9 μM. Compared with the control group, alloimperatorin increased the apoptotic rate of HeLa cells and reduced the mitochondrial membrane potential of HeLa cells. The Western blot results showed that alloimperatorin promotes the expression of caspase3, 8, 9 and that Bax apoptotic proteins reduce PARP expression, procaspase3, 8, 9, and BCL-2 proteins and reduces the cyt-c in the mitochondria expression. The results demonstrated that alloimperatorin can induce HeLa cell apoptosis through mitochondria and extrinsic apoptotic pathways.
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Affiliation(s)
- Yingying Bai
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
| | - Lijuan Yang
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
| | - Chaihong Zhang
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
| | - Yongxiu Yang
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
- Department of Obstetrics and Gynecology, First Hospital of Lanzhou University, Lanzhou, Gansu, China
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Abstract
PURPOSE To explore the characteristics of gut microbiota and its relationship between clinical manifestations in patients with type 1 narcolepsy (NT1). PATIENTS AND METHODS Scale and polysomnography were performed in 20 NT1 patients and 16 healthy controls (HC group) to evaluate the clinical characteristics of NT1. Illumina sequencing was performed on bacterial 16S ribosomal RNA gene using V3-V4 regions to compare the fecal microbiota in all subjects. Associations between clinical characteristics and gut microbiota were analyzed using partial correlation analysis. RESULTS Compared with the HC group, the NT1 group had a significantly higher ESS score, longer total sleep time, increased wakefulness, decreased sleep efficiency, disturbance of sleep structure, shorter mean sleep latency, and increased sleep-onset REM periods (all P < 0.05). No differences in alpha and beta diversity were observed between the two groups. In contrast, there were significant differences at the level of class, order, family, and genus (all P < 0.05). LEfSe analysis showed that the relative abundance of Klebsiella in the NT1 group was higher than that in the HC group (P < 0.05), while the relative abundance of Blautia, Barnesiellaceae, Barnesiella, Phocea, Lactococcus, Coriobacteriia, Coriobacteriales, Ruminiclostridium_5, and Bilophila were lower (all P < 0.05). Partial correlation analysis revealed that partial differential bacteria in the NT1 group were correlated with total sleep time, sleep efficiency, stage 1 sleep, arousal index, and sleep latency (all P < 0.05). CONCLUSION Our data revealed differences in intestinal flora structure between NT1 patients and the normal population, thus providing a theoretical basis for future microecological therapy for narcolepsy. However, future larger sample size studies and different study designs are needed to further clarify the possible pathogenesis and potential causality of intestinal flora in NT1 patients and explore the new treatment strategies.
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Affiliation(s)
- Ruirui Zhang
- Department of Neurology, Henan Provincial People's Hospital Affiliated to Henan University, Zhengzhou, Henan, People's Republic of China
| | - Shanjun Gao
- Microbiome Laboratory, Henan Provincial People's Hospital, Zhengzhou, Henan, People's Republic of China
| | - Shenghui Wang
- Department of Neurology, Henan Provincial People's Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Jiewen Zhang
- Department of Neurology, Henan Provincial People's Hospital Affiliated to Henan University, Zhengzhou, Henan, People's Republic of China.,Department of Neurology, Henan Provincial People's Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yingying Bai
- Department of Neurology, Henan Provincial People's Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Shuang He
- Department of Neurology, Henan Provincial People's Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Pan Zhao
- Department of Neurology, Henan Provincial People's Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Hongju Zhang
- Department of Neurology, Henan Provincial People's Hospital Affiliated to Henan University, Zhengzhou, Henan, People's Republic of China.,Department of Neurology, Henan Provincial People's Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, People's Republic of China
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15
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Xu R, Bai Y, Min S, Xu X, Tang T, Ju S. In vivo Monitoring and Assessment of Exogenous Mesenchymal Stem Cell-Derived Exosomes in Mice with Ischemic Stroke by Molecular Imaging. Int J Nanomedicine 2020; 15:9011-9023. [PMID: 33235449 PMCID: PMC7680167 DOI: 10.2147/ijn.s271519] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [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: 07/09/2020] [Accepted: 09/29/2020] [Indexed: 12/13/2022] Open
Abstract
Purpose Mesenchymal stem cell-derived exosomes (MSC-exos) are considered an important restorative treatment for ischemic stroke. However, the migration ability and survival of exogenous MSC-exos remain unclear. Here, we investigated whether MSC-exos migrate into the ischemic brain and play a protective role against ischemic stroke. Methods MSC-exos labeled with DiR were injected intravenously into mice with ischemic stroke. Near-infrared fluorescence (NIRF) images were obtained on days 0, 1, 3, 5, 7, 10, and 14, and magnetic resonance (MR) images were obtained on days 1, 7 and 14. On day 14, the functional outcomes, angiogenesis, neurogenesis, and white matter remodeling were assessed, and Western blot assays were performed. Results Fluorescence signals from the MSC-exos appeared in the injured brain from day 1 and peaked on day 3. The immunofluorescence staining of the brain samples revealed that the MSC-exos were localized in neurons. The behavioral scores and T2-weighted imaging indicated that the MSC-exos improved neurological functional recovery after stroke. In addition, the in vivo MR-diffusion tensor imaging (DTI) indicated that the exogenous MSC-exos increased the fractional anisotropy (FA) value, fiber length, and fiber number ratio. Furthermore, in the mice with ischemic stroke treated with MSC-exos, angiogenesis and neurogenesis were significantly improved, and the expression of IL-1β was reduced. Conclusion MSC-exos can migrate into the brains of mice with ischemic stroke and exert therapeutic effects against ischemic stroke; therefore, MSC-exos may have broad clinical applications in the future.
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Affiliation(s)
- Rong Xu
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210009, People's Republic of China
| | - Yingying Bai
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210009, People's Republic of China
| | - Shudan Min
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210009, People's Republic of China
| | - Xiaoxuan Xu
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210009, People's Republic of China
| | - Tianyu Tang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210009, People's Republic of China
| | - Shenghong Ju
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing 210009, People's Republic of China
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16
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Bai YY, Xu X, Yu XJ, Guo J, Dong XX, Wang XY, Zhao ZA, Wang J. Skimmed Milk Diluent Promotes the Sperm Motility and Conception Rate of Dorper Sheep Compared to Vitamin B12 Diluent. Cryo Letters 2020; 41:358-364. [PMID: 33990813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
BACKGROUND Dorper sheep is an ideal breed for improvement, with higher meat production and increased adaptability. Artificial insemination is an efficient technique for Dorper genetic improvement and reproduction management. However, there is no uniform diluent for Dorper semen dilution. OBJECTIVE To compare the effects of vitamin B12 (VB12) and skimmed milk diluents on sperm motility at different ratios and time points, and the effects on conception rate. MATERIALS AND METHODS We detected the effect of diluents on sperm density, deformity, motility and conception rate of Dorper sheep. RESULTS We found the optimal dilution ratio of skimmed milk is 1:3. Compared to VB12, skimmed milk at 1:3 ratio prolonged semen storage time (48 h vs. 18 h, storage at a low temperature of 4°C) and increased the survival index of sperm (44.7 ± 2.8 vs. 18.5 ± 0.6, P<0.01). CONCLUSION Skimmed milk is more effective, nutritious and convenient than vitamin B12, representing a more advantageous diluent.
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Affiliation(s)
- Y Y Bai
- College of Animal Science and Technology, Hebei North University, Zhangjiakou, 075000, Hebei, P.R. China
| | - X Xu
- Zhangjiakou Animal Husbandry Technology Extension Station, Zhangjiakou, 075000, Hebei, P.R. China
| | - X J Yu
- College of Animal Science and Technology, Hebei North University, Zhangjiakou, 075000, Hebei, P.R. China
| | - J Guo
- Zhangjiakou Animal Husbandry Technology Extension Station, Zhangjiakou, 075000, Hebei, P.R. China
| | - X X Dong
- College of Animal Science and Technology, Hebei North University, Zhangjiakou, 075000, Hebei, P.R. China
| | - X Y Wang
- College of Animal Science and Technology, Hebei North University, Zhangjiakou, 075000, Hebei, P.R. China
| | - Z A Zhao
- Institute of Microcirculation and Department of Pathophysiology of Basic Medical College, Hebei North University, Zhangjiakou, 075000, Hebei, P.R. China.
| | - J Wang
- College of Animal Science and Technology, Hebei North University, Zhangjiakou, 075000, Hebei, P.R. China.
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Peng XG, Zhao Z, Chang D, Bai Y, Xu Q, Ju S. Quantification of Fat Concentration and Vascular Response in Brown and White Adipose Tissue of Rats by Spectral CT Imaging. Korean J Radiol 2020; 21:248-256. [PMID: 31997600 PMCID: PMC6992445 DOI: 10.3348/kjr.2019.0111] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 09/23/2019] [Indexed: 11/15/2022] Open
Abstract
Objective The purpose of the study was to non-invasively characterize and discriminate brown adipose tissue (BAT) from white adipose tissue (WAT) in rats using spectral computed tomography (CT) with histological validation. Materials and Methods A lipid-containing phantom (lipid fractions from 0% to 100%) was imaged with spectral CT. An in vivo, non-enhanced spectral CT scan was performed on 24 rats, and fat concentrations of BAT and WAT were measured. The rats were randomized to receive intraperitoneal treatment with norepinephrine (NE) (n = 12) or saline (n = 12). Non-enhanced and enhanced spectral CT scans were performed after treatment to measure the elevation of iodine in BAT and WAT. The BAT/aorta and WAT/aorta ratios were calculated and compared, after which isolated BAT and WAT samples were subjected to histological and uncoupling protein 1 (UCP1) analyses. Results The ex-vivo phantom study showed excellent linear fit between measured fat concentration and the known gravimetric reference standard (r2 = 0.996). In vivo, BAT had significantly lower fat concentration than WAT (p < 0.001). Compared to the saline group, the iodine concentration of BAT increased significantly (p < 0.001) after injection of NE, while the iodine concentration of WAT only changed slightly. The BAT/aorta ratio also increased significantly after exposure to NE compared to the saline group (p < 0.001). Histological and UCP1 expression analyses supported the spectral CT imaging results. Conclusion The study consolidates spectral CT as a new approach for non-invasive imaging of BAT and WAT. Quantitative analyses of BAT and WAT by spectral CT revealed different characteristics and pharmacologic activations in the two types of adipose tissue.
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Affiliation(s)
- Xin Gui Peng
- Department of Radiology, Zhongda Hospital, Jiangsu Key Laboratory of Molecular and Functional Imaging, Medical School of Southeast University, Nanjing, China
| | - Zhen Zhao
- Department of Radiology, Zhongda Hospital, Jiangsu Key Laboratory of Molecular and Functional Imaging, Medical School of Southeast University, Nanjing, China
| | - Di Chang
- Department of Radiology, Zhongda Hospital, Jiangsu Key Laboratory of Molecular and Functional Imaging, Medical School of Southeast University, Nanjing, China
| | - Yingying Bai
- Department of Radiology, Zhongda Hospital, Jiangsu Key Laboratory of Molecular and Functional Imaging, Medical School of Southeast University, Nanjing, China
| | - Qiuzhen Xu
- Department of Radiology, Zhongda Hospital, Jiangsu Key Laboratory of Molecular and Functional Imaging, Medical School of Southeast University, Nanjing, China
| | - Shenghong Ju
- Department of Radiology, Zhongda Hospital, Jiangsu Key Laboratory of Molecular and Functional Imaging, Medical School of Southeast University, Nanjing, China.
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Zhang R, Li Z, Bai Y, Xu P, Zhang J, Zhang H. [Changes of brain structural network properties in patients with rapid eye movement sleep behavior disorder]. Nan Fang Yi Ke Da Xue Xue Bao 2020; 40:125-130. [PMID: 32376561 DOI: 10.12122/j.issn.1673-4254.2020.01.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the changes in behaviors and brain structural network in patients with idiopathic rapid eye movement sleep behavior disorder (iRBD). METHODS Twenty patients with iRBD (iRBD group) and 22 healthy control subjects were evaluated using the Unified Parkinson's Disease Rating Scale (UPDRS) and Hoehn-Yahr staging. Diffusion tensor imaging and graph- theoretical analysis were performed for analyzing the topological characteristics of brain structural networks of the patients, and the correlation between the behavioral changes and the changes in the topological characteristics of the brain networks was analyzed. RESULTS The UPDRS score was significantly higher in iRBD group than in the healthy control group (P < 0.05). No significant difference was found in small-world attributes between the patients with iRBD and the control subjects (P>0.05). The patients with iRBD exhibited significantly shortened characteristic shortest path length Lp (P < 0.05) and significantly increased global efficiency, local efficiency and assortativity (P < 0.05). Examination of regional topological properties of the brain network revealed abnormal node properties in the frontal, temporal, parietal, occipital, and striatal and limbic lobes in patients with iRBD. The patients also had significantly increased degree centrality of the left pallidum and enhanced nodal efficiency in the left thalamus, superior temporal gyrus, temporal pole and bilateral superior occipital gyrus, bilateral putamens as well as the right gyrus rectus, amygdala, supramarginal gyrus, and middle temporal gyrus. The nodal local efficiency was significantly increased in the left superior frontal gyrus, middle cingulate gyrus, superior parietal gyrus, bilateral fusiform gyrus, right superior motor area, postcentral gyrus and angular gyrus of the patients with iRBD. The nodal shortest path was significantly shortened in the left superior motor area, pallidum, thalamus, superior temporal gyrus, temporal pole, bilateral putamens, bilateral superior occipital gyrus, right rectus gyrus, amygdala, supramarginal gyrus and middle temporal gyrus, and the nodal clustering coefficient was significantly lowered in the left superior occipital gyrus of the patients. In patients with iRBD, the UPDRS I score was positively correlated with the nodal efficiency in the right supramarginal gyrus (r=0.50, P < 0.05) and local nodal efficiency in the right fusiform gyrus (r=0.53, P < 0.05), and negatively correlated with the nodal clustering coefficient in the left superior occipital gyrus (r=-0.552, P < 0.05). CONCLUSIONS Patients with iRBD present with abnormal changes in mental condition, behaviors, emotions, activities of daily living and motor functions. The brain structural network of patient with iRBD still has a small-world property with abnormal global topological property and abnormal distribution of local topological property in the cortex, striatum and limbic system.
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Affiliation(s)
- Ruirui Zhang
- Department of Neurology, People's Hospital of Henan University, Zhengzhou 450003, China
| | - Zhonglin Li
- Department of Imaging, People's Hospital of Henan University, Zhengzhou 450003, China
| | - Yingying Bai
- Department of Neurology, People's Hospital of Henan University, Zhengzhou 450003, China
| | - Pengfei Xu
- Department of Neurology, People's Hospital of Henan University, Zhengzhou 450003, China
| | - Jiewen Zhang
- Department of Neurology, People's Hospital of Henan University, Zhengzhou 450003, China
| | - Hongju Zhang
- Department of Neurology, People's Hospital of Henan University, Zhengzhou 450003, China
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Li H, Dong C, Tian Y, Li X, Wang B, Zhai D, Bai Y, Chao X. Knockdown of diacylglycerol kinase zeta (DGKZ) induces apoptosis and G2/M phase arrest in human acute myeloid leukemia HL-60 cells through MAPK/survivin/caspase pathway. Pharmazie 2020; 74:418-422. [PMID: 31288898 DOI: 10.1691/ph.2019.9386] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Diacylglycerol kinase zeta (DGKZ) is associated with the pathogenesis of a variety of malignant diseases, but its biological function on acute myeloid leukemia (AML) has not been explored. The aim of this study was to analyze apoptosis induced by knockdown of DGKZ and its mechanism in human acute myeloid leukemia HL-60 cells. qRT-PCR was carried out to detect the expression of DGKZ in HL-60, THP-1, Jurkat, K562, and CD34 cell lines. Additionally the expression of DGKZ in AML cells obtained from patients were detected by qRT-PCR. Cell Counting Kit-8 (CCK-8) assay was used to determine the viability of HL-60 cells DGKZ knocked down. Apoptosis and cell cycle phase of HL-60 cells after DGKZ knockdown were evaluated by flow cytometry. Western blot analysis was performed to investigate expressions of the proteins related to apoptosis and cell cycle. Results showed that expression of DGKZ was significantly higher in HL-60 and AML cells obtained from patients than those of Jurkat, THP-1, K562 and human CD34 cell. Compared with the shCtrl group, DGKZ was markedly knocked down in HL-60 cells transfected with lentivirus encoding shRNA. DGKZ knockdown significantly inhibited the proliferation and induced cycle arrest at the G2/M phase in HL-60 cells. The expressions of MAPK, caspase-3, caspase-8, cytochrome C markedly increased and p-MAPK and survivin decreased in HL-60 cells after DGKZ knockdown. The results suggest that knockdown of DGKZ can induce apoptosis and G2/M phase arrest in human acute myeloid leukemia HL-60 cells through the MAPK/survivin/caspase pathway.
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Bai YY, Zhang HJ, Li ZL, Wang SH, Li YL, You Y, Qin YL, Zhang JW. [Abnormal functional connectivity between sublaterodorsal nucleus and the motor cortex in Parkinson's disease with rapid-eye-movement sleep behavior disorder]. Zhonghua Yi Xue Za Zhi 2019; 99:993-997. [PMID: 30955311 DOI: 10.3760/cma.j.issn.0376-2491.2019.13.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the abnormal functional connectivity between sublaterodorsal nucleus (SLD) and the brain motor areas in Parkinson's disease with or without rapid-eye-movement (REM) sleep behavior disorder by resting state functional magnetic resonance imaging (rfMRI). Methods: A total of 64 subjects recruited in the Department of Neurology, the People's Hospital of Zhengzhou University were enrolled in this study from August 2014 to December 2017 according to international diagnosis criteria, 20 cases with PD-RBD (PD-RBD group), 23 cases without PD-nRBD (PD-nRBD group) and 21 age, gender-matched healthy controls (HC group). All subjects were examined by Hoehn-Yahr, UPDRS-Ⅲ and rfMRI. Resluts: UPDRS-Ⅲ scores and Hoehn-Yahr staging were showed significantly different from that in the HC group(KW=-27.35, P<0.001) but showed no significantly difference from that in the PD-nRBD group(KW=6.01, P=0.807). Compared with the control group, the FC analysis showed reduced correlations from the left SLD to the right orbital middle frontal gyrus(T=-4.567 8, P<0.001), the left cingulate gyrus(T=-3.196 0,P<0.001), the left cerebellum(T=-4.267 0,P<0.001) and the right midbrain(T=-4.773 7, P<0.001), from the right SLD to the bilateral cerebellum (T(left)=-5.040 1, T(right)=-4.210 5, P<0.001), the left precuneus(T=-4.468 2,P<0.001) and the left precentral gyrus (T=-4.473 9,P<0.001) in the PD-RBD. The correlations between the left SLD and left cerebellum, right midbrain and between the right SLD and left precuneus, left precentral gyrus were negative correlated with the motor functional tests. Conclusions: There are abnormal functional connectivity from the SLD to the motor areas in PD-RBD patients, leading to clinical PD-RBD motor symptoms and movement disorders.
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Affiliation(s)
- Y Y Bai
- Department of Neurology, the People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - H J Zhang
- Department of Neurology, the People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - Z L Li
- Department of Radiology, the People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - S H Wang
- Department of Neurology, the People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - Y L Li
- Department of Radiology, the People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - Y You
- Department of Radiology, the People's Hospital of Zhengzhou University, Zhengzhou 450003, China
| | - Y L Qin
- Information Engineering University, People's Liberation Army of China, Zhengzhou 450001, China
| | - J W Zhang
- Department of Neurology, the People's Hospital of Zhengzhou University, Zhengzhou 450003, China
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Li H, Tian Y, Li X, Wang B, Zhai D, Bai Y, Dong C, Chao X. Knockdown of IARS2 Inhibited Proliferation of Acute Myeloid Leukemia Cells by Regulating p53/p21/PCNA/eIF4E Pathway. Oncol Res 2019; 27:673-680. [PMID: 30832756 PMCID: PMC7848268 DOI: 10.3727/096504018x15426261956343] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
IARS2 encodes mitochondrial isoleucine-tRNA synthetase, which mutation may cause multiple diseases. However, the biological function of IARS2 on acute myeloid leukemia (AML) has not yet been identified. In the present study, qRT-PCR was used to determine the expression of IARS2 in K562, THP1, and HL-60 leukemia cells. Additionally the mRNA levels of IARS2 in CD34 cells and AML cells obtained from patients were detected by qRT-PCR. IARS2-shRNA lentiviral vector was established and used to infect acute myeloid leukemia HL-60 cells. qRT-PCR and Western blot analysis were employed to assess the knockdown effect of IARS2. The proliferation rate and cell cycle phase of HL-60 cells after IARS2 knockdown were evaluated by CCK-8 assay and flow cytometry. The PathScan Antibody Array was used to determine the expression of cell cycle-related proteins in HL-60 cells after IARS2 knockdown. The expression of proliferation-related proteins in HL-60 cells after IARS2 knockdown was determined by Western blot analysis. Results showed that IARS2 expression was stable and much higher in HL-60, THP-1, and K562 leukemia cells and AML cells obtained from patients than that of human CD34 cells. Compared with cells of the shCtrl group, IARS2 was markedly knocked down in cells that were transfected with lentivirus encoding shRNA of IARS2 in HL-60 cells (p < 0.05). IARS2 knockdown significantly inhibited the proliferation and induced cycle arrest at the G1 phase in HL-60 cells. Additionally IARS2 knockdown significantly increased the expression of p53 and p21, and decreased the expression of PCNA and eIF4E in HL-60 cells. In conclusion, IARS2 knockdown can inhibit acute myeloid leukemia HL-60 cell proliferation and cause cell cycle arrest at the G1 phase by regulating the p53/p21/PCNA/eIF4E pathways.
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Affiliation(s)
- Hong Li
- The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, P.R. China
| | - Yaning Tian
- The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, P.R. China
| | - Xiang Li
- The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, P.R. China
| | - Bin Wang
- The College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, P.R. China
| | - Dongzhi Zhai
- The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, P.R. China
| | - Yingying Bai
- The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, P.R. China
| | - Changhu Dong
- The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, P.R. China
| | - Xu Chao
- The Second Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, P.R. China
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Peng X, Li C, Bai Y, Wang X, Zhang Y, An Y, Teng GJ, Ju S. Noninvasive evaluation of the migration effect of transplanted endothelial progenitor cells in ischemic muscle using a multimodal imaging agent. Int J Nanomedicine 2018; 13:1819-1829. [PMID: 29606873 PMCID: PMC5868615 DOI: 10.2147/ijn.s152976] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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] [Indexed: 01/01/2023] Open
Abstract
Background Endothelial progenitor cells (EPCs) play an important role in repairing ischemia tissues. However, the survival, migration and therapeutic efficacy of EPCs after transplantation need to be better understood for further cell therapy. Purpose This study investigated the migration effect of EPCs labeled with a multimodal imaging agent in a murine ischemic hindlimb model, using magnetic resonance imaging (MRI) and optical imaging after transplantation. Methods EPCs derived from mouse bone marrow were labeled with a multimodal imaging agent and were administered through intracardiac delivery to mice with ischemic hindlimbs. The injected EPCs and their migration effect were observed via MRI and optical imaging in vivo, and then compared to a reference standard based on histological data. The quantification of gadolinium in tissue samples was done using inductively coupled plasma mass spectrometry (ICP-MS). Results Using in vivo MRI and optical imaging, the labeled EPCs were observed to migrate to ischemic muscle on days 3-5 after injection, while ex vivo, the EPCs were observed in the capillary vessels of the injured tissue. There were significant linear correlations between the Gd contents measured using ICP-MS in samples from the ischemic hindlimbs and livers and T1 relaxation times calculated using MRI, as well as the average fluorescence signal intensities recorded in optical images (T1 relaxation time: r=0.491; average signal from optical imaging: r=0.704, P<0.01). EPC treatment upregulated the levels of C-X-C chemokine receptor 4 and vascular endothelial growth factor (VEGF) receptor 2 and enhanced the expression of stromal cell-derived factor-1 and VEGF. Conclusion Transplanted EPCs can be monitored with noninvasive MRI and optical imaging in vivo and were found to enhance the paracrine secretion of angiogenic factors.
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Affiliation(s)
- Xingui Peng
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing
| | - Cong Li
- Key Laboratory of Smart Drug Delivery, Ministry of Education & PLA, School of Pharmacy, Fudan University, Shanghai, People's Republic of China
| | - Yingying Bai
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing
| | - Xinyi Wang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing
| | - Yi Zhang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing
| | - Yanli An
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing
| | - Gao-Jun Teng
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing
| | - Shenghong Ju
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School of Southeast University, Nanjing
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Seigel GM, Manohar S, Bai YY, Ding D, Salvi R. An immortalized microglial cell line (Mocha) derived from rat cochlea. Mol Cell Neurosci 2017; 85:202-210. [PMID: 29109020 DOI: 10.1016/j.mcn.2017.11.001] [Citation(s) in RCA: 2] [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] [Received: 06/01/2017] [Revised: 10/19/2017] [Accepted: 11/02/2017] [Indexed: 01/18/2023] Open
Abstract
Microglia are glial-immune cells that are essential for the function and survival of the central nervous system. Microglia not only protect neural tissues from immunological insults, but also play a critical role in neural development and repair. However, little is known about the biology of microglia in the cochlea, the auditory portion of the inner ear. In this study, we detected TMEM119+, CD11b+, CD45+ and Iba1+ populations of cells in the rat cochlea, particularly in Rosenthal's canal, inner sulcus and stria vascularis. Next, we isolated and enriched the population of CD11b+ cells from the cochlea and immortalized these cells with the 12S E1A gene of adenovirus in a replication-incompetent retroviral vector to derive a novel microglial cell line, designated Mocha (microglia of the cochlea). The resulting Mocha cells express a number of markers consistent with microglia and respond to lipopolysaccharide (LPS) stimulation by upregulation of genes (Cox2, ICAM-1, Il6r, Ccl2, Il13Ra and Il15Ra) as well as releasing cytokines (IL-1beta, IL-12, IL-13 and RANTES). As evidence of microglial function, Mocha cells phagocytose fluorescent beads at 37°C, but not at 4°C. The expression pattern of microglial markers in Mocha cells suggests that immortalization leads to a more primitive phenotype, a common phenomenon in immortalized cell lines. In summary, Mocha cells display key characteristics of microglia and are now available as a useful model system for the study of cochlear microglial behavior, both in vitro and in vivo.
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Affiliation(s)
- G M Seigel
- University at Buffalo, Center For Hearing & Deafness, 3435 Main Street, Cary 137, Buffalo, NY 14214, United States.
| | - S Manohar
- University at Buffalo, Center For Hearing & Deafness, 3435 Main Street, Cary 137, Buffalo, NY 14214, United States.
| | - Y Y Bai
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing 210009, China.
| | - D Ding
- University at Buffalo, Center For Hearing & Deafness, 3435 Main Street, Cary 137, Buffalo, NY 14214, United States.
| | - R Salvi
- University at Buffalo, Center For Hearing & Deafness, 3435 Main Street, Cary 137, Buffalo, NY 14214, United States; Department of Audiology and Speech-Language Pathology, Asia University, Taichung, Taiwan.
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Zhu G, Wang J, Song M, Zhou F, Fu D, Ruan G, Bai Y, Yu Z, Zhang L, Zhu X, Huang L, Pang R, Pan X. Overexpression of Jagged1 Ameliorates Aged Rat-Derived Endothelial Progenitor Cell Functions and Improves Its Transfusion Efficiency for Rat Balloon-Induced Arterial Injury. Ann Vasc Surg 2017; 41:241-258. [PMID: 28163178 DOI: 10.1016/j.avsg.2016.10.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 02/03/2016] [Accepted: 10/17/2016] [Indexed: 01/09/2023]
Abstract
BACKGROUND Endothelial progenitor cell (EPC) has significant age-dependent alterations in properties, but the role of Jagged1 in aging-induced decline of EPC functions remains unclear. METHODS 2- and 20-month old healthy male Sprague-Dawley rats were used in present study. Jagged1 gene transfection was performed in EPC isolated from aged (AEPC) and young rats (YEPC), respectively. Experiments were divided into 4 groups: (1) pIRES2-EGFP (PE) group, (2) PE-combined N-[N-(3, 5-difluoro-phenacetyl)-1- alany1]-S-phenyglycine t-butyl ester (DAPT) (PE + D) group, (3) pIRES2 EGFP-Jagged1 (PEJ) group, and (4) PEJ combined DAPT (PEJ + D) group. Notch molecules were detected by real-time quantitative polymerase chain reaction or Western blotting. CD34, CD133, CD45, and KDR markers were detected by flow cytometry. EPC migration and proliferation were detected with a modified Boyden chamber and 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay, respectively; the tube formation ability was assayed by in vitro angiogenesis kit; EPC transfusion after Jagged1 gene transfection was performed in rat carotid artery injury models. RESULTS Jagged1 gene transfection effectively activates notch-signaling pathway. Compared with PE groups, overexpression of Jagged1 significantly promoted AEPC functions including proliferation, migration, the tube formation ability, and cell differentiation, these effects could be reasonably diminished by DAPT. In vivo study demonstrated that Jagged1 overexpressing also significantly promoted AEPC homing to the vascular injury sites and decreases the neointima formation after vascular injury. CONCLUSIONS Overexpression of Jagged1 ameliorates aged rat-derived EPC functions and increases its transfusion efficiency for balloon-induced rat arterial injury.
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Affiliation(s)
- Guangxu Zhu
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China.
| | - Jinxiang Wang
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China
| | - Mingbao Song
- Cardiovascular Institute, Department of Cardiovascular Disease, Xinqiao Hospital, Third Military Medical University, Chongqing, People's Republic of China
| | - Fang Zhou
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China; Department of Clinical Laboratory, PLA Kunming General Hospital Clinical College of Medicine, Kunming Medical University, Kunming, People's Republic of China
| | - Dagan Fu
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China
| | - Guangping Ruan
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China
| | - Yingying Bai
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China
| | - Zhengping Yu
- Institute of Biological Effect of Electromagnetic Radiation, Department of Occupational Health, School of Military Preventive Medicine, Third Military Medical University, Chongqing, People's Republic of China
| | - Leilei Zhang
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China
| | - Xiangqing Zhu
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China
| | - Lan Huang
- Cardiovascular Institute, Department of Cardiovascular Disease, Xinqiao Hospital, Third Military Medical University, Chongqing, People's Republic of China
| | - Rongqing Pang
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China
| | - Xinghua Pan
- Cell Biological Therapy Center, Cell Biological Medicine Integrated Engineering Laboratory of State and Region, Department of Clinical Laboratory, Kunming General Hospital of Chengdu Military Area Command of PLA, Kunming, Yunnan Province, People's Republic of China.
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Peng XG, Wang Y, Zhang S, Bai Y, Mao H, Teng GJ, Ju S. Noninvasive assessment of age, gender, and exercise effects on skeletal muscle: Initial experience with T 1 ρ MRI of calf muscle. J Magn Reson Imaging 2016; 46:61-70. [PMID: 27862560 DOI: 10.1002/jmri.25546] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 10/25/2016] [Indexed: 12/12/2022] Open
Abstract
PURPOSE To prospectively investigate age- and gender-related changes in the fast-twitch (tibialis anterior, TA) and slow-twitch (soleus, SOL) skeletal muscle of healthy rats and volunteers and to compare the exercise-related difference in health volunteers with T1 ρ magnetic resonance imaging (MRI). MATERIALS AND METHODS In all, 18 rats and 70 humans were involved in this study. For the animal study, T1 ρ relaxation times were measured in the TA and SOL rat muscle with a 3.0T MRI scanner and compared to histological data. For the human study, three groups (young, middle-aged, and elderly) of volunteers underwent T1 ρ MRI scans (3.0T) of their calves. To further differentiate the human scans, 18 volunteers were recruited, half of them (n = 9) routinely trained with high-intensity sports, while the other half (n = 9) with no physical training. Statistical analysis was performed via paired t-test, independent-sample t-test, and analysis of variance (ANOVA). Correlations between T1 ρ and age/gender/physical endurance were calculated. RESULTS The average T1 ρ relaxation times of the TA and SOL of female rats were higher than that of male rats (P < 0.001). The T1 ρ relaxation time of TA was significantly lower compared to SOL (P < 0.001). A significant linear correlation was observed between T1 ρ and the type I slow-twitch fiber proportion (%) in SOL (R2 = 0.837, P < 0.001). Similarly, in human studies the average T1 ρ relaxation times of TA were significantly lower than SOL for all age groups (P < 0.001). The higher T1 ρ relaxation times of TA and SOL in the elderly volunteers (P < 0.001) and in the females (P < 0.05) indicated significant age- and gender-dependent differences. In high-intensity sports groups, the higher T1 ρ in SOL (P < 0.01) and lower in TA (P < 0.05) were observed compared with the control group. CONCLUSION This study demonstrated that T1 ρ MRI can be used to display the differences in fast- and slow-twitch skeletal muscle as well as potentially age-, gender-, and exercise-related differences. LEVEL OF EVIDENCE 2 Technical Efficacy: Stage 1 J. MAGN. RESON. IMAGING 2017;46:61-70.
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Affiliation(s)
- Xin-Gui Peng
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, P.R. China
| | - Yuancheng Wang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, P.R. China
| | - Shijun Zhang
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, P.R. China
| | - Yingying Bai
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, P.R. China
| | - Hui Mao
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Gao-Jun Teng
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, P.R. China
| | - Shenghong Ju
- Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, Nanjing, P.R. China
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Jiang H, Du H, Bai Y, Hu Y, Rao Y, Chen C, Cai Y. Effects of spatiotemporal variation of soil salinity on fine root distribution in different plant configuration modes in new reclamation coastal saline field. Environ Sci Pollut Res Int 2016; 23:6639-6650. [PMID: 26645228 DOI: 10.1007/s11356-015-5764-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 11/04/2015] [Indexed: 06/05/2023]
Abstract
In order to study the effects of salinity on plant fine roots, we considered three different plant configuration modes (tree stand model (TSM), shrub stand model (SSM), and tree-shrub stand model (TSSM)). Soil samples were collected with the method of soil drilling. Significant differences of electrical conductivity (EC) in the soil depth of 0-60 cm were observed among the three modes (p < 0.05). In the above three modes, the variation of soil salinity among various soil layers and monthly variation of soil salinity were the highest in SSM and reached 2.30 and 2.23 mS/cm (EC1:5), respectively. Due to the effect of salinity, fine root biomass (FRB) showed significant differences in different soil depths (p < 0.05). More than 60% of FRB was concentrated in the soil depth above 30 cm. FRB showed exponential decline with soil depth (p < 0.05). FRB showed spatial heterogeneity in the 40-cm soil depth. In the above three modes, compared with FRB, specific root length (SRL) and fine root length density (FRLD) showed the similar changing trend. Fine roots showed significant seasonal differences among different modes (p < 0.05). FRB showed the bimodal variation and was the highest in July. However, we found that the high content of salts had obvious inhibitory effect on the distribution of FRB. Therefore, the salinity should be below 1.5 mS/cm, which was suitable for the growth of plant roots. Among the three modes, TSSM had the highest FRB, SRL, and FRLD and no obvious soil salt accumulation was observed. The results indicated that fine root biomass was affected by high salt and that TSSM had the strong effects of salt suppression and control. In our study, TSSM may be the optimal configuration mode for salt suppression and control in saline soil.
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Affiliation(s)
- Hong Jiang
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China
- Department of Geography, Faculty of Earth Science, College of Resource and Environment Science, East China Normal University, Shanghai, 200241, China
- Ecological Engineering College, Guizhou University of Engineering Science, Bijie, 551700, Guizhou, China
| | - Hongyu Du
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China
- Department of Geography, Faculty of Earth Science, College of Resource and Environment Science, East China Normal University, Shanghai, 200241, China
| | - Yingying Bai
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China
- Department of Geography, Faculty of Earth Science, College of Resource and Environment Science, East China Normal University, Shanghai, 200241, China
| | - Yue Hu
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China
- Department of Geography, Faculty of Earth Science, College of Resource and Environment Science, East China Normal University, Shanghai, 200241, China
| | - Yingfu Rao
- Shanghai Harbour City Ecological Garden Co., Ltd., Shanghai, China
| | - Chong Chen
- Shanghai Harbour City Ecological Garden Co., Ltd., Shanghai, China
| | - Yongli Cai
- Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, 200241, China. ylcai.@geo.ecnu.edu.cn
- Department of Geography, Faculty of Earth Science, College of Resource and Environment Science, East China Normal University, Shanghai, 200241, China. ylcai.@geo.ecnu.edu.cn
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Zhang ZW, Qin XY, Che FY, Xie G, Shen L, Bai YY. Effects of beta 2 adrenergic agonists on axonal injury and mitochondrial metabolism in experimental autoimmune encephalomyelitis rats. Genet Mol Res 2015; 14:13572-81. [PMID: 26535670 DOI: 10.4238/2015.october.28.17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The primary aims of this study were to investigate mitochondrial metabolism during experimental allergic encephalomyelitis (EAE) animal model axonal injury and to determine the correlation among neurological function scores, pathological changes, and the activities of the BB isoenzyme of creatine kinase (CK-BB), catalase (CAT), and calpain in the brain tissues of EAE rats. Another goal was to preliminarily define the mechanism of mitochondrial metabolism resulting from the effect of beta 2 adrenergic agonists in the process of EAE animal model axonal damage. EAE was induced in specific pathogen free Wistar rats by guinea pig spinal cord homogenate, complete Freund's adjuvant, and pertussis vaccine. We recorded the behavioral change in EAE rats, detected pathological changes in central nervous tissue, and observed the changes of the CK-BB, CAT, and calpain in the EAE rat brain and spinal cord. The results indicated that the average neurologic function score increased in the EAE group compared to that of the controls (P < 0.01). In addition, CAT and CK-BB activities significantly decreased and the calpain activity significantly increased compared with those of the control group (P < 0.05). The decrease of the activity of central nervous CK-BB and CAT content, as well as the increase of calpain activity at the highest time point were considered to be the consequences of EAE. Furthermore, the results revealed that use of salbutamol could alleviate disease symptoms and reduce the recurrence of the EAE disease.
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Affiliation(s)
- Z W Zhang
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - X Y Qin
- Department of Neurology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - F Y Che
- Department of Neurology, Jiangjin Central Hospital, Chongqing, China
| | - G Xie
- Department of Neurology, Jiangjin Central Hospital, Chongqing, China
| | - L Shen
- Department of Neurology, Jiangjin Central Hospital, Chongqing, China
| | - Y Y Bai
- Department of Neurology, Jiangjin Central Hospital, Chongqing, China
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Zhang L, Lu Z, Bai Y, Wang T, Wang Z, Chen J, Ding Y, Yang F, Xiao Z, Ju S, Zhu J, He N. PEGylated denatured bovine serum albumin modified water-soluble inorganic nanocrystals as multifunctional drug delivery platforms. J Mater Chem B 2013; 1:1289-1295. [DOI: 10.1039/c2tb00380e] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Li W, Zhang JW, Lu F, Ma MM, Wang JQ, Suo AQ, Bai YY, Liu HQ. [Effects of telmisartan on the level of Aβ1-42, interleukin-1β, tumor necrosis factor α and cognition in hypertensive patients with Alzheimer's disease]. Zhonghua Yi Xue Za Zhi 2012; 92:2743-2746. [PMID: 23290159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To explore the effects of telmisartan, an angiotensin II type 1 receptor blocker with peroxisome proliferator-activated receptor γ-stimulating activity, on the levels of Aβ1-42, interleukin-1β (IL-1β), tumor necrosis factor-alpha (TNF-α) and cognition in elderly hypertensive patients with Alzheimer's disease (AD). METHODS A total of 48 patients with probable AD and essential hypertension were randomly assigned into telmisartan group (n = 24, 40 - 80 mg qd) or amlodipine group (n = 24, 5 - 10 mg qd) for 6 months at Henan Provincial People's Hospital during 2008 - 2011. Cognitive evaluations were assessed at pre-treatment and 24 weeks post-treatment by clinical assessment, rating scales and neuropsychological tests while the cerebrospinal fluid (CSF) levels of Aβ1-42, IL-1β and TNF-α by enzyme-linked immunosorbent assay (ELISA). RESULTS After 6 months, mean systolic blood pressure (SBP) and diastolic blood pressure (DBP) significantly decreased compared with baseline values to a similar extent in both groups. No significant differences existed between two groups in SBP or DBP. The patients displayed significantly higher Aβ1-42 and greatly lower levels of IL-1β and TNF-α in the telmisartan group versus the amlodipine group (P < 0.05). At 24 weeks, the patients in the telmisartan group had better mini-mental state examination (MMSE) (22.0 ± 3.4) and Alzheimer's disease assessment scale-cognitive subscale (ADAS-cog) (15 ± 5) scales scores than those taking amlodipine (MMSE (19.5 ± 2.8) and ADAS-cog (18 ± 5). Patients treated with telmisartan had better improvement on the MMSE (P < 0.05) and ADAS-cog (P < 0.05) scales compared with the amlodipine group by the end of study week 24. CONCLUSION Telmisartan may delay the decreased level of Aβ1-42 and reduce the levels IL-1β and TNF-α in CSF so as to improve the cognitive function of elderly hypertensive patients with AD. With additional benefits in comparison with common antihypertensive drugs, it may offer a novel therapeutic strategy of AD.
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Affiliation(s)
- Wei Li
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou 450003, China
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Bai YY, Yan RH, Ye GY, Huang FN, Cheng JA. Effects of transgenic rice expressing Bacillus thuringiensis Cry1Ab protein on ground-dwelling collembolan community in postharvest seasons. Environ Entomol 2010; 39:243-51. [PMID: 20146862 DOI: 10.1603/en09149] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
During 2005-2008, field studies were conducted at two locations in Chongqing, China, to assess the potential effects of transgenic rice expressing Bacillus thuringiensis (Bt) Cry1Ab protein on the nontarget ground-dwelling collembolan community in three postharvest seasons. Collembolans in non-Bt and Bt rice fields were sampled with pitfall traps during each of two postharvest seasons of 2005/2006 and 2006/2007 and litterbag traps during each of three postharvest seasons of 2005/2006, 2006/2007, and 2007/2008. Ground-dwelling collembolans in rice fields during the postharvest seasons were abundant, whereas community densities varied considerably between the two locations and among the three seasons. A total of 67,310 collembolans, representing three species, Entomobrya griseoolivata, Hypogastrura matura, and Bourletiella christianseni, were captured during the three postharvest seasons. E. griseoolivata was the predominant species, accounting for 87.7% of the total captures, followed by H. matura (10.7%) and B. christianseni (1.6%). In general, there were no significant differences in species compositions and abundances of each species between Bt and non-Bt paddy fields, suggesting no significantly impact of plant residues of Cry1Ab rice on collembolan communities during postharvest seasons.
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Affiliation(s)
- Y Y Bai
- Institute of Insect Sciences, Zhejiang University, Hangzhou, China
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Affiliation(s)
- Yingying Bai
- a Department of Chemistry , Tongji University , Shanghai, P.R. China
| | - Bing Yan
- a Department of Chemistry , Tongji University , Shanghai, P.R. China
| | - Zhenxia Chen
- b Department of Chemistry , Fudan University , Shanghai, P.R. China
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Xu Y, Bai YY, Wei ZM, Xu ZH. [Enhanced resistance of transgenic tobacco expressing Shiva A gene against bacterial wilt disease (Pseudomonas solanacearum pv tabaci)]. Shi Yan Sheng Wu Xue Bao 1999; 32:73-6. [PMID: 12548797] [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: 02/28/2023]
Abstract
Shiva A gene was introduced into tobacco mediated by Agrobacterium tumefaciens. Transgenic plants show enhanced resistance against bacterial wilt disease (Pseudomonas solanacearum pv tabaci). Compared with control plants, the disease indexes of transgenic tobacco plants Sc-2 and Sc-6 drop about 42.1% and 60.6%.
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Affiliation(s)
- Y Xu
- National Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology, Academia Sinica, Shanghai 200032, P.R. China
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Li XB, Zheng SX, Dong WB, Chen GR, Mao HZ, Bai YY. [Insect-resistant transgenic plants of Brassica napus and analysis of resistance in the plants]. Yi Chuan Xue Bao 1999; 26:262-8. [PMID: 10589167] [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: 04/14/2023]
Abstract
Cotyledons, each with a 1-2 mm petiole at its base, were cut from axenic seedlings and infected with Agrobacterium tumefaciens. After 2-3 days of cocultivation, the cotyledon explants were transferred to MS selection medium containing 15 mg/L kanamycin and 4.5 mg/L 6-BA to induce shoot differentiation. Kanamycin-resistant shoots were subcultured on selection medium with 20-50 mg/L kanamycin for 3-6 months for eliminating escaped non-transformants, and then rooted on MS medium containing 25 mg/L kanamycin and 0.1 mg/L NAA. Whole plants were transplanted into soil and grew in the field. DNA Southern blot hybridization and polymerase chain reaction showed that some of the plants were positive when probed with the insecticidal crystal protein gene. The transgenic plants exhibited tolerant to pest insects such as Laphygma exigua and Pieris rapae in leaf feeding experiments Kanamycin-resistance and insect-resistance were maintained in the progeny. The foreign genes were delivered to the progeny according to Mendelian Law of single gene segregation.
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Affiliation(s)
- X B Li
- College of Life Sciences, Central China Normal University, Wuhan
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Li XB, Mao HZ, Bai YY. Transgenic plants of rutabaga (Brassica napobrassica) tolerant to pest insects. Plant Cell Rep 1995; 15:97-101. [PMID: 24185663 DOI: 10.1007/bf01690262] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/1994] [Revised: 03/16/1995] [Indexed: 06/02/2023]
Abstract
Cotyledons cut from axenic seedlings were immersed inAgrobacterium tumefaciens suspension which was treated with acetosyringone and nopaline at low pH overnight. The infected cotyledon explants were cultured on MSB medium (MS salts + B5 Vitamins) containing 6-BA 3mg/1 for 2-3 days, and transferred onto selective medium (MSB with kanamycin 50-100 mg/l). Kanamycin-resistant shoots were selected. More than 60 regenerated plants were obtained. About 60% of the plants showed high NPT II activity. Southern blot hybridization showed that some of the plants gave a positive signal with the insecticidal crystal protein gene (cry IA gene) probe, and exhibited tolerant to insects such asPieris rapae (cabbage caterpillar) in leaf feeding experiments. Kanamycin-resistance and insect-resistance were maintained in the progeny.
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Affiliation(s)
- X B Li
- Department of Biology, Central China Normal University, 430070, Wuhan, China
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Abstract
An insect larval toxin designated CryII is produced by several subspecies of Bacillus thuringiensis and differs from the other major delta-endotoxins in these bacteria in its size, toxicity profile and presence as part of an operon with three open reading frames (ORF). Such an operon from a novel B. thuringiensis isolate has been cloned and differs from one previously characterized in the following ways: (a) the size and number of amino acid repeats in one of the ORFs; (b) the smaller size of the CryII protoxin and the presence of a unique 110-kDa CryII-related antigen; and (c) high larvicidal activity for a particular Lepidopteran but low activity for a Dipteran. Various subclones of this operon were introduced into a plasmid-free B. thuringiensis strain and only the cryII gene was found to be necessary for protoxin accumulation.
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Affiliation(s)
- D Wu
- Department of Biological Sciences, Purdue University, West Lafayette, IN 47907
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Bai YY, Hose G, Stefanski K, Taylor HS. Born-Oppenheimer adiabatic mechanism for regularity of states in the quantum stadium billiard. Phys Rev A Gen Phys 1985; 31:2821-2826. [PMID: 9895836 DOI: 10.1103/physreva.31.2821] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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