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Lv L, Cui EH, Wang B, Li LQ, Hua F, Lu HD, Chen N, Chen WY. Multiomics reveal human umbilical cord mesenchymal stem cells improving acute lung injury via the lung-gut axis. World J Stem Cells 2023; 15:908-930. [PMID: 37900940 PMCID: PMC10600741 DOI: 10.4252/wjsc.v15.i9.908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/23/2023] [Accepted: 09/06/2023] [Indexed: 09/25/2023] Open
Abstract
BACKGROUND Acute lung injury (ALI) and its final severe stage, acute respiratory distress syndrome, are associated with high morbidity and mortality rates in patients due to the lack of effective specific treatments. Gut microbiota homeostasis, including that in ALI, is important for human health. Evidence suggests that the gut microbiota improves lung injury through the lung-gut axis. Human umbilical cord mesenchymal cells (HUC-MSCs) have attractive prospects for ALI treatment. This study hypothesized that HUC-MSCs improve ALI via the lung-gut microflora. AIM To explore the effects of HUC-MSCs on lipopolysaccharide (LPS)-induced ALI in mice and the involvement of the lung-gut axis in this process. METHODS C57BL/6 mice were randomly divided into four groups (18 rats per group): Sham, sham + HUC-MSCs, LPS, and LPS + HUC-MSCs. ALI was induced in mice by intraperitoneal injections of LPS (10 mg/kg). After 6 h, mice were intervened with 0.5 mL phosphate buffered saline (PBS) containing 1 × 106 HUC-MSCs by intraperitoneal injections. For the negative control, 100 mL 0.9% NaCl and 0.5 mL PBS were used. Bronchoalveolar lavage fluid (BALF) was obtained from anesthetized mice, and their blood, lungs, ileum, and feces were obtained by an aseptic technique following CO2 euthanasia. Wright's staining, enzyme-linked immunosorbent assay, hematoxylin-eosin staining, Evans blue dye leakage assay, immunohistochemistry, fluorescence in situ hybridization, western blot, 16S rDNA sequencing, and non-targeted metabolomics were used to observe the effect of HUC-MSCs on ALI mice, and the involvement of the lung-gut axis in this process was explored. One-way analysis of variance with post-hoc Tukey's test, independent-sample Student's t-test, Wilcoxon rank-sum test, and Pearson correlation analysis were used for statistical analyses. RESULTS HUC-MSCs were observed to improve pulmonary edema and lung and ileal injury, and decrease mononuclear cell and neutrophil counts, protein concentrations in BALF and inflammatory cytokine levels in the serum, lung, and ileum of ALI mice. Especially, HUC-MSCs decreased Evans blue concentration and Toll-like receptor 4, myeloid differentiation factor 88, p-nuclear factor kappa-B (NF-κB)/NF-κB, and p-inhibitor α of NF-κB (p-IκBα)/IκBα expression levels in the lung, and raised the pulmonary vascular endothelial-cadherin, zonula occludens-1 (ZO-1), and occludin levels and ileal ZO-1, claudin-1, and occludin expression levels. HUC-MSCs improved gut and BALF microbial homeostases. The number of pathogenic bacteria decreased in the BALF of ALI mice treated with HUC-MSCs. Concurrently, the abundances of Oscillospira and Coprococcus in the feces of HUS-MSC-treated ALI mice were significantly increased. In addition, Lactobacillus, Bacteroides, and unidentified_Rikenellaceae genera appeared in both feces and BALF. Moreover, this study performed metabolomic analysis on the lung tissue and identified five upregulated metabolites and 11 downregulated metabolites in the LPS + MSC group compared to the LPS group, which were related to the purine metabolism and the taste transduction signaling pathways. Therefore, an intrinsic link between lung metabolite levels and BALF flora homeostasis was established. CONCLUSION This study suggests that HUM-MSCs attenuate ALI by redefining the gut and lung microbiota.
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Affiliation(s)
- Lu Lv
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - En-Hai Cui
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China.
| | - Bin Wang
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Li-Qin Li
- Traditional Chinese Medicine Key Laboratory Cultivation Base of Zhejiang Province for the Development and Clinical Transformation of Immunomodulatory Drugs, Huzhou 313000, Zhejiang Province, China
| | - Feng Hua
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Hua-Dong Lu
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Na Chen
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Wen-Yan Chen
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
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Lu HD, Xie JL, Zhang LN, Zheng YY, Zhou XG. [Clinicopathological features of angioimmunoblastic T-cell lymphoma pattern Ⅰ]. Zhonghua Bing Li Xue Za Zhi 2022; 51:856-860. [PMID: 36097902 DOI: 10.3760/cma.j.cn112151-20211222-00925] [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: 06/15/2023]
Abstract
Objective: To investigate the clinicopathological features of angioimmunoblastic T-cell lymphoma pattern Ⅰ (AITL Pattern Ⅰ). Methods: The clinicopathological data of 11 AITL Pattern Ⅰ cases that were diagnosed at the Beijing Friendship Hospital Affiliated to Capital Medical University (10 cases) and Beijing Lu Daopei Hospital (1 cases) from January 2019 to October 2021 were retrospectively collected. Immunophenotype, Epstein-Barr virus infection status and T cell receptor (TCR) clonality of the tumor cells were tested, and clinicopathological features of cases were analyzed. Results: Among the 11 AITL Pattern Ⅰ cases, the male to female ratio was 1.2∶1.0. The median age was 59 years (range 47-78 years). Seven cases had B symptoms, while eleven cases presented with systemic lymphadenopathy. According to Ann Arbor system staging, two cases were classified as stage Ⅰ-Ⅱ, and 9 cases as stage Ⅲ-Ⅳ. Hepatosplenomegaly was present in two cases (2/11), three cases (3/11) had skin rash and pruritus, and two cases (2/11) had pleural effusion. Previously, 6 cases (6/11) were diagnosed as reactive hyperplasia, 1 case (1/11) as EBV-associated lymphoproliferative disorder, and 4 cases (4/11) as hyperplasia of lymphoid tissue, which was unable to exclude lymphoma. Histologically, all the 11 cases showed hyperplastic follicles in the paracortical regions with well-formed germinal centers. The hyperplastic follicles showed ill-defined borders and attenuated mantle zones in 7 cases. Mantle zones completely disappeared in 4 cases. The follicles were surrounded by a thin layer of atypical lymphocytes with bright or faintly stained cytoplasm. In 2 cases, the clear cells were located between the germinal centers and the thin residual mantle cell layers, showing a circular growth pattern. The cells were medium in size, with irregular karyotype, coarse chromatin and indistinct nucleoli. Immunohistochemically, CD21 staining showed that the meshworks of follicular dendritic cells(FDC)were mainly confined to the follicles. There was a subtle expansion of the meshworks of FDC in 4 cases with ill-defined borders. The atypical cells surrounding the follicles expressed CD3 (11/11), CD4 (11/11), PD-1 (11/11), CXCL13 (6/11), ICOS (10/11) and CD10 (7/11). PD-1 staining showed a strong perifollicular pattern, and a small number of positive cells were scattered around the high endothelial veins in the interfollicular region. CXCL13, ICOS and CD10 showed similar distribution patterns. EBV-encoded small RNA probe (EBER) in situ hybridization showed that EBER positive B lymphocytes were scattered in the interfollicular region (5-20/HPF) in all cases. T cell receptor gene rearrangement was monoclonal in all cases. Conclusions: Diagnosing AITL Pattern Ⅰ may be challenging and requires comprehensive analysis of clinical manifestations, histological morphology, immunophenotype and gene rearrangement results.
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Affiliation(s)
- H D Lu
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - J L Xie
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - L N Zhang
- Department of Pathology, Beijing Lu Daopei Hospital, Beijing 100176, China
| | - Y Y Zheng
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - X G Zhou
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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Shen L, Tian XJ, Liang RZ, Cheng Y, Kong XL, He F, Zhang C, Wang GA, Li SH, Lu HD, Sun SQ. [Clinical and imaging features of Chlamydia psittaci pneumonia: an analysis of 48 cases in China]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:886-891. [PMID: 34565115 DOI: 10.3760/cma.j.cn112147-20210127-00082] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the clinical characteristics, imaging findings, laboratory tests and treatment strategies for Chlamydia psittaci pneumonia. Methods: From January 1, 2019 to January 20, 2021, 48 cases of Psittacosis from 11 hospitals in China were diagnosed via metagenomic next-generation sequencing(mNGS). The data of all patients on occupational history, clinical manifestations, laboratory tests, chest computed tomography(CT)findings, treatment outcomes and prognosis were retrospectively analyzed. Results: Among the 48 patients, there were 29 males and 19 females, with a mean age of (57.1±10.3) years. Thirty patients had a confirmed history of exposure to poultry. The onset to admission interval was (6.5±3.2) days, and hospital stay was (12.4±4.8) days. Clinical manifestations included fever (100%, 48/48), relative bradycardia (71%, 34/48), cough (54.2%, 26/48), sputum (27.1%, 13/48), fatigue (16.7%, 8/48), headache and delirium (20.8%, 9/48), and gastrointestinal symptoms (16.7%, 8/48). Laboratory data showed that white blood cells were (8.0±3.8)×109/L, and the proportion of neutrophils increased in 44 patients. The level of C-reactive protein was (155.3±74.1)mg/L, and that of procalcitonin (PCT)in 59.5% of patients was more than 0.5 μg/L. Percentages of patients with increased lactate dehydrogenase and creatine kinase were 82.9% and 45.2%, respectively. Chest CT scans showed unilateral lung involvement in 34 cases(70.8%) and single lobe involvement in 27 cases(56.3%).The most common imaging change was consolidation, with 38 cases (79.2%) showing lobar consolidation. In terms of treatment, 25 patients were treated with fluoroquinolones alone, 6 patients with doxycycline alone, and 13 patients with combined treatment. The combined-treatment group and the doxycycline alone group were similar in the course of defervescence. The combined treatment group and the doxycycline alone group were both superior to the fluoroquinolones alone group. However, 11 patients were admitted to ICU, all of them received artificial ventilation, and 5 cases developed shock, and one died. Conclusions: Chlamydia psittaci pneumonia is an animal-derived infectious disease with unique features in clinical symptoms, laboratory tests and chest imaging. Appropriate treatment is able to significantly shorten the course of disease and improve the prognosis.
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Affiliation(s)
- L Shen
- Department of Pulmonary and Critical Care Medicine, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - X J Tian
- Department of Infectious Disease, the First People's Hospital of Xiaoshan District, Hangzhou 311201, China
| | - R Z Liang
- Department of Pulmonary and Critical Care Medicine, the First Hospital of Longyan Affiliated to Fujian Medical University, Longyan 364000, Fujian Province, China
| | - Y Cheng
- Department of Infectious Diseases, Hunan University of Traditional Medicine Affiliated Ningxiang People's Hospital, Ningxiang 410600, Hunan Province, China
| | - X L Kong
- Department of Pulmonary and Critical Care Medicine, Changsha First Hospital, Changsha 410005, China
| | - F He
- Department of Pulmonary and Critical Care Medicine, Affiliated Hangzhou Chest Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China
| | - C Zhang
- Institute of Respiratory Disease, China Three Gorges University, Yichang Central People's Hospital, Yichang 443003, Hubei Province, China
| | - G A Wang
- Department of Pulmonary and Critical Care Medicine, Ningbo Medical Center Li Huili Hospital, Ningbo 315040, China
| | - S H Li
- Department of Pulmonary Medicine, Hangzhou Ninth People's Hospital, Hangzhou 311225, China
| | - H D Lu
- Department of Respiratory and Critical Care, Huzhou Central Hospital, Huzhou 313000, Zhejiang Province, China
| | - S Q Sun
- Department of General Medicine, Nanjing Second Hospital, Nanjing 210003, China
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Gu S, Lu HD, Xie JW, Chen J, Fan XS, Xu J. [Computational pathology and its contributions to precision medicine]. Zhonghua Bing Li Xue Za Zhi 2021; 50:851-855. [PMID: 34344065 DOI: 10.3760/cma.j.cn112151-20201130-00878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- S Gu
- Institute for AI in Medicine & School of Automation, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - H D Lu
- Institute for AI in Medicine & School of Automation, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - J W Xie
- Institute for AI in Medicine & School of Automation, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - J Chen
- Department of Pathology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - X S Fan
- Department of Pathology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - J Xu
- Institute for AI in Medicine & School of Automation, Nanjing University of Information Science and Technology, Nanjing 210044, China
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Ma H, You GP, Cui F, Chen LF, Yang XJ, Chen LG, Lu HD, Zhang WQ. Effects of a low-fat diet on the hepatic expression of adiponectin and its receptors in rats with NAFLD. Ann Hepatol 2015; 14:108-17. [PMID: 25536648] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Non-alcoholic fatty liver disease (NAFLD) is correlated with obesity, but specific therapeutic interventions are lacking. Adiponectin is an adipokine with anti-inflammatory activity and is considered a hepatic protector. We aimed to investigate effects of a low-fat diet on the hepatic expression of adiponectin and its receptors in rats with NAFLD. MATERIALS AND METHODS Sixteen male SD rats were fed a high-fat diet for 8 weeks (HFD1 group) or 16 weeks (HFD2 group) to induce NAFLD, and these rats were compared with rats on a normal diet for 8 weeks (NC1 group) or 16 weeks (NC2 group). Another group of 8 rats was fed an HFD for 8 weeks and then switched to a low-fat diet (DIET group) until the 16th week. The expression of hepatic adiponectin and its receptors was detected by western blotting, immunohistochemistry and RT-qPCR. RESULTS The NAFLD activity score (NAS) in the HFD groups increased from 3.2 ± 0.45 (8th week) to 6.2 ± 0.84 (16th week) (P < 0.001), reflecting the progression in the NAFLD histology. In contrast to the HFD2 group, the low-fat diet ameliorated the steatosis, ballooning degeneration and inflammation. Dietary intervention augmented the expression of adiponectin and its receptors, which was down-regulated in the HFD2 group. CONCLUSIONS The NAFLD rat model was successfully developed by feeding the animals a high-fat diet. Adiponectin may play a role in the pathogenesis of NAFLD, especially in the progression from steatosis to NASH. The low-fat diet alleviated the histological lesions associated with NAFLD by up-regulating the expression of adiponectin and its receptors.
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Affiliation(s)
- Hong Ma
- Departments of Endocrinology, Zhongshan Hospital Xiamen University, Fujian, China
| | - Guo-Ping You
- Department of Endocrinology, Xiamen Zhongshan Teaching Hospital of Fujian Medical University, Fujian, China
| | - Fan Cui
- Departments of Endocrinology, Zhongshan Hospital Xiamen University, Fujian, China
| | - Lu-Fang Chen
- Departments of Endocrinology, Zhongshan Hospital Xiamen University, Fujian, China
| | - Xiang-Jiu Yang
- Departments of Endocrinology, Zhongshan Hospital Xiamen University, Fujian, China
| | - Li-Gang Chen
- Departments of Gastroenterology Zhongshan Hospital Xiamen University, Fujian, China
| | - Hua-Dong Lu
- Departments of Pathology, Zhongshan Hospital Xiamen University, Fujian, China
| | - Wen-Qiang Zhang
- Departments of Endocrinology, Zhongshan Hospital Xiamen University, Fujian, China
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Ma H, Zhang XP, Zhang Y, Lu HD, Wang JT, Zhang Y, Wu XB. Pancreatic Insulinoma Misdiagnosed as Epilepsy for Eight Years: A Case Report and Literature Review. Intern Med 2015; 54:1519-22. [PMID: 26267909 DOI: 10.2169/internalmedicine.54.3708] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 58-year-old Chinese man presented with intermittent seizure episodes after being misdiagnosed with epilepsy for eight years. MRI revealed an abnormally strong signal in the distal pancreas. The patient was subsequently diagnosed with pancreatic insulinoma based on the histological findings, and his symptoms improved following surgical removal of the tumor. The appearance of unusual manifestations of insulinoma makes it difficult to diagnose the condition. This disorder should be included in the differential diagnosis of epilepsy and mental illness.
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Ma H, Cui F, Dong JJ, You GP, Yang XJ, Lu HD, Huang YL. Therapeutic effects of globular adiponectin in diabetic rats with nonalcoholic fatty liver disease. World J Gastroenterol 2014; 20:14950-14957. [PMID: 25356056 PMCID: PMC4209559 DOI: 10.3748/wjg.v20.i40.14950] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 02/14/2014] [Accepted: 06/13/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To explore the therapeutic role of globular adiponectin (gAd) in high-fat diet/streptozotocin (STZ)-induced type 2 diabetic rats with nonalcoholic fatty liver disease (NAFLD).
METHODS: Seven rats were fed a basic diet (normal control group; NC) during the experiment. Experimental rats (14 rats) were given a high-fat diet for 4 wk and were then injected with STZ to induce type 2 diabetes mellitus (T2DM) and NAFLD. Half of the T2DM/NAFLD rats were randomly injected intraperitoneally with gAd for 7 d (gAd-treated group), while the other 7 rats (T2DM/NAFLD group) received 0.9% saline. Plasma biochemical parameters and insulin concentrations were measured. Liver histopathology was examined by hematoxylin-eosin staining. Insulin receptor expression in the liver was analyzed by immunohistochemical staining, Western blot and quantitative real-time reverse transcription polymerase chain reaction analysis.
RESULTS: Compared to the control group, the T2DM/NAFLD group had increased levels of glucolipid and decreased levels of insulin. Plasma glucose and lipid levels were decreased in the gAd-treated group, while serum insulin levels increased. The expression of insulin receptor in the T2DM/NAFLD group increased compared with the NC group, and gAd downregulated insulin receptor expression in the livers of T2DM/NAFLD rats. Steatosis of the liver was alleviated in the gAd-treated group compared to the T2DM/NAFLD group (NAS 1.39 ± 0.51 vs 1.92 ± 0.51, P < 0.05).
CONCLUSION: Globular adiponectin exerts beneficial effects in T2DM rats with NAFLD by promoting insulin secretion, mediating glucolipid metabolism, regulating insulin receptor expression and alleviating hepatic steatosis.
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MESH Headings
- Adiponectin/administration & dosage
- Adiponectin/pharmacology
- Animals
- Biomarkers/blood
- Blood Glucose/metabolism
- Diabetes Mellitus, Experimental/blood
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/genetics
- Diabetes Mellitus, Type 2/blood
- Diabetes Mellitus, Type 2/chemically induced
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/genetics
- Diet, High-Fat
- Hypoglycemic Agents/administration & dosage
- Hypoglycemic Agents/pharmacology
- Injections, Intraperitoneal
- Insulin/blood
- Lipids/blood
- Liver/drug effects
- Liver/metabolism
- Liver/pathology
- Male
- Non-alcoholic Fatty Liver Disease/blood
- Non-alcoholic Fatty Liver Disease/drug therapy
- Non-alcoholic Fatty Liver Disease/etiology
- Non-alcoholic Fatty Liver Disease/genetics
- Non-alcoholic Fatty Liver Disease/pathology
- RNA, Messenger/metabolism
- Rats, Wistar
- Receptor, Insulin/drug effects
- Receptor, Insulin/genetics
- Receptor, Insulin/metabolism
- Streptozocin
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Lu HD, Chen G, Ts'o DY, Roe AW. A rapid topographic mapping and eye alignment method using optical imaging in Macaque visual cortex. Neuroimage 2008; 44:636-46. [PMID: 19013530 DOI: 10.1016/j.neuroimage.2008.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2007] [Revised: 06/10/2008] [Accepted: 10/06/2008] [Indexed: 10/21/2022] Open
Abstract
In optical imaging experiments, it is often advantageous to map the field of view and to converge the eyes without electrophysiological recording. This occurs when limited space precludes placement of an electrode or in chronic optical chambers in which one may not want to introduce an electrode each session or for determining eye position in studies of ocular disparity response in visual cortex of anesthetized animals. For these purposes, we have developed a spot imaging method that can be conducted rapidly and repeatedly throughout an experiment. Using small 0.2 degrees -0.5 degrees spots, the extent of the imaged field of view is mapped by imaging cortical response to single spots, placed at different positions (0.2 degrees steps) in either the horizontal or vertical axes. By shifting the relative positions of two spots, one presented to each eye, eye convergence can be assessed to within 0.1 degrees resolution. Once appropriate eye alignment is determined, stimuli for further optical imaging procedures (e.g. imaging random dot stimuli for study of disparity responses) can then be confidently placed. This procedure can be quickly repeated throughout the experiment to ensure maintained eye alignment.
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Affiliation(s)
- H D Lu
- Dept of Psychology, 301 Wilson Hall, Vanderbilt University, Nashville, TN 37212, USA
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Lu HD, Wang ZQ, Pan YR, Zhou TS, Xu XZ, Ke TW. Comparison of serum Zn, Cu and Se contents between healthy people and patients in high, middle and low incidence areas of gastric cancer of Fujian Province. World J Gastroenterol 1999; 5:84-86. [PMID: 11819396 PMCID: PMC4688512 DOI: 10.3748/wjg.v5.i1.84] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Xie XH, Lu HD, Wang L, Diao YC. [Integration of visual signals in the brain: mechanisms and functional significance of synchronous oscillation]. Sheng Li Ke Xue Jin Zhan 1997; 28:108-12. [PMID: 11038701] [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: 02/18/2023]
Abstract
How are the functions performed by one part of the nervous system integrated with those of others? One possible way is by synchronous oscillation. We have reviewed recent advances in visual system, where synchronous oscillations have been intensively observed and investigated. This article is concentrated on discussing theoretical reasoning, experimental evidence, possible mechanisms underlying the generation and the functional significance of visual synchronous oscillations. Predictions on several prosperous areas were also outlined.
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Affiliation(s)
- X H Xie
- Laboratory of Visual Information Processing, Academia Sinica, Beijing
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Lu HD. [Some new technics in gynecology and obstetrics]. Zhonghua Hu Li Za Zhi 1984; 19:374-7. [PMID: 6399693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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