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Wang P, Yang L, Li H, Lei Z, Yang X, Liu C, Jiang H, Zhang L, Zhou Z, Reinhardt JD, He C. Effects of whole-body vibration training with quadriceps strengthening exercise on functioning and gait parameters in patients with medial compartment knee osteoarthritis: a randomised controlled preliminary study. Physiotherapy 2015; 102:86-92. [PMID: 26111989 DOI: 10.1016/j.physio.2015.03.3720] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Accepted: 03/05/2015] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To compare the effects of whole-body vibration training (WBVT) with quadriceps strengthening exercise (QSE) with QSE alone on functioning and gait parameters in patients with medial compartment knee osteoarthritis. DESIGN Randomised controlled preliminary study. SETTING Department of Rehabilitation Medicine, West China Hospital, Chengdu, Sichuan, People's Republic of China. SUBJECTS Thirty-nine patients with medial compartment knee osteoarthritis. INTERVENTIONS Participants were assigned at random to one of two groups. MAIN MEASURES Visual analogue scale (VAS) for pain, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), timed up and go test (TUG), 6-minute walk distance test (6MWD), and three-dimensional gait analysis during level walking at baseline, 12 weeks and 16 weeks (follow-up). RESULTS Compared with baseline, significant improvements in VAS, all WOMAC scales, TUG, 6MWD and all spatiotemporal parameters were seen in both the WBVT+QSE group and the QSE alone group at 12 and 16 weeks. However, the WBVT+QSE group showed greater improvements than the QSE alone group in WOMAC scales (physical function), TUG, 6MWD and cadence at 12 weeks. No differences were found between the WBVT+QSE and QSE alone groups in VAS, WOMAC scales (pain, stiffness), kinematic and kinetic gait parameters, and other spatiotemporal parameters at 12 weeks and 16 weeks. CONCLUSION Over a 3-month period, WBVT in combination with QSE improved symptoms, physical function and spatiotemporal parameters in patients with medial compartment knee osteoarthritis, and led to greater improvement than QSE alone in WOMAC scales (physical function), TUG, 6MWD and cadence.
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Wang L, Yang H, Lei Z, Zhao J, Chen Y, Chen P, Li C, Zeng Y, Liu Z, Liu X, Zhang HT. Repression of TIF1γ by SOX2 promotes TGF-β-induced epithelial-mesenchymal transition in non-small-cell lung cancer. Oncogene 2015; 35:867-77. [PMID: 25961934 DOI: 10.1038/onc.2015.141] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 03/14/2015] [Accepted: 03/20/2015] [Indexed: 12/19/2022]
Abstract
TIF1γ is a novel regulator of transforming growth factor (TGF)-β/Smad signaling. Our previous studies show that dysregulated expression of transcriptional intermediary factor 1 γ (TIF1γ) and abnormal TGF-β/Smad signaling are implicated in non-small-cell lung cancer (NSCLC) separately. However, how TIF1γ contributes to NSCLC by controlling TGF-β/Smad signaling is poorly understood. Here, we investigated the mechanistic role of TIF1γ in TGF-β-induced epithelial-mesenchymal transition (EMT), as well as a link between TIF1γ and SOX2 in NSCLC. We show that TIF1γ is a downstream target of SOX2 in NSCLC cells. SOX2 overexpression negatively regulated TIF1γ promoter activity and thereby attenuated TIF1γ mRNA and protein expression levels; SOX2 knockdown significantly enhanced TIF1γ promoter activity and augmented TIF1γ expression. Moreover, TIF1γ mRNA expression was downregulated in human NSCLC tissues and negatively correlated with SOX2 protein, which was upregulated in NSCLC tissues. Importantly, knockdown of TIF1γ or SOX2 overexpression augmented SMAD4 (human Mad (mothers against decapentaplegic)-related homologous protein 4)-dependent transcriptional responses, and enhanced TGF-β-induced EMT and human NSCLC cell invasion; knockdown of SOX2 impaired TGF-β-induced EMT and NSCLC cell invasion. In an in vivo model of metastasis, knockdown of TIF1γ promotes NSCLC cell metastasis. In addition, our data suggested that TIF1γ inhibited TGF-β-induced EMT through competing with SMAD4 in NSCLC cells. Taken together, our findings reveal a new mechanism by which SOX2-mediated transcription repression of TIF1γ promotes TGF-β-induced EMT in NSCLC.
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Patel U, Sobowale K, Fan J, Liu NN, Kuwabara S, Lei Z, Sherer R, Voorhees BV. Cultural considerations for adaptation of an internet-based intervention
for depression prevention in Mainland China. Ann Glob Health 2015. [DOI: 10.1016/j.aogh.2015.02.985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Lei Z, Yan Y, Feng J, Wu J, Huang G, Li X, Xing W, Zhao L. Enhanced power factor within graphene hybridized carbon aerogels. RSC Adv 2015. [DOI: 10.1039/c5ra03198b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The electrical conductivity and Seebeck coefficient can be simultaneously enhanced in graphene hybridized carbon aerogels, which allows an improvement of two orders of magnitude in power factor.
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Redding S, Li X, Wu G, Ko C, Cooney A, Bohler H, Lan ZJ, Lei Z. Transforming growth factor-B1 (TGF-B1) and fibroblast growth factor-7 (FGF-7) elevated in ovaries of selective theca cell phosphatase and tensin homolog mutant (tPtenMT) mice with PCOS-like phenotype. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lei Z, M Brandt M, Van Mil A, Grundmann S, Smits M, Van Middelaar B, Fukao T, Cheng C, Doevendans P, Sluijter JPG. P66MicroRNA-132/212 family promotes arteriogenesis by prolonging Ras-MAPK signaling. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu082.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yang Z, Shi X, Zhang Y, Wang S, Lei Z, Liu X, Fan D. Retrospective analysis of factors affecting the efficacy of surgical treatment of the scar. MINERVA CHIR 2014; 69:83-89. [PMID: 24504221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM The scar is a major problem in the medical profession. Its timely treatment is very important for the better outcome of the scar treatment and for the improvement of the life quality of the patients. The aim of this study was retrospectively analyzed the epidemiological characteristics affecting the efficacy of the scar surgical treatment of the people in the western part of China. METHODS Total 414 scar cases were retrospectively analyzed to clarify the epidemiological characteristics and the factors affecting the scar surgical treatment efficacy. The factors included were sex, age, area distribution, treatment seasons, injury sites, injury causes, and the time from scarring to the surgical treatment. All scar cases were surgically treated with the repairing technology including skin graft, flap and soft tissue dilation. RESULTS There were 206 males and 208 females with the average age 20.53±12.9 years (age range 1-68 years). The patient proportions in the age groups of 0-20, 21-40 and >40 years were 61.4% (254 cases), 29.2% (121 cases), and 9.4% (39 cases) respectively. The patient's attendance rate reached the highest during the summer and winter. Most patients were from the rural areas with an increasing tendency each year. The burn scars were the most abundant and the injury sites were mostly the head and face. Univariate analysis showed that the time from scarring to the surgical treatment and the injury sites were significantly influenced the scar surgical treatment efficacy. Logistic regression analysis demonstrated that the injured sites of the head and face significantly influenced the scar surgical treatment efficacy. CONCLUSION With the development of economy in China, more scar patients especially younger and children visit doctors predominantely from the rural areas. Usually, they get their scars in the exposed area of their bodies (head and face) which seriously affect the patient's appearance and function. Factors influencing the scar surgical treatment efficacy has important clinical significance of prevention and treatment.
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Peng KW, Lei Z, Xiao TH, Jia FG, Zhong WX, Gao Y, Shen BX, Xie JW. First trimester caesarean scar ectopic pregnancy evaluation using MRI. Clin Radiol 2014; 69:123-9. [DOI: 10.1016/j.crad.2013.07.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 05/21/2013] [Accepted: 07/24/2013] [Indexed: 10/25/2022]
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Wen Z, Lei Z, Jin-An M, Xue-Zhen L, Xing-Nan Z, Xiu-Wen D. The inhibitory role of miR-214 in cervical cancer cells through directly targeting mitochondrial transcription factor A (TFAM). EUR J GYNAECOL ONCOL 2014; 35:676-682. [PMID: 25556274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mitochondrial transcription factor A (TFAM) is a high-mobility group (HMG) protein and acts as a key regulator in mitochondrial DNA (mtDNA) replication, transcription, and inheritance. Accumulating evidence has demonstrated that TFAM plays an important role in tumorigenesis; however, the regulatory mechanism of TFAM in cervical cancer has not been revealed. In the current study, the au- thors found that with malignancy of cervical cancer, the protein expression of TFAM was gradually increased, while the expression of miRNA-214 was gradually downregulated. They further identified that TFAM is a target of miR-214. Forced overexpression of miRNA-214 significantly suppressed cell proliferation, cell cycle progression, colony-formation, and migration of cervical cancer Hela and Caski cells; however, upregulation of TFAM notably promoted cell proliferation, cell cycle progression, colony-formation, and migration of Hela and Caski cells. The authors further showed that miR-214 enhanced the susceptibility of Hela and Caski cells to the chemotherapy drug cisplatin. In conclusion, the current study provides a new sight for the regulatory pattern of miRNA-214 and TFAM in cervical cancer in vitro, indicating that miRNA-214 and MTFA may become important candidates for developing promising therapeutic strategies for the treatment of cervical cancer.
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Wang HB, Li YX, Hao YJ, Wang TF, Lei Z, Wu Y, Zhao QP, Ang H, Ma L, Liu J, Zhao CJ, Jiang YX, Wang YR, Dai XY, Zhang WN, Sun T, Yu JQ. Neuroprotective effects of LBP on brain ischemic reperfusion neurodegeneration. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2013; 17:2760-2765. [PMID: 24174357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
AIM The present study was conducted to investigate whether LBP had a protective effect on cerebral ischemic reperfusion injury and to determine the possible mechanisms. MATERIALS AND METHODS Male Kunming (KM) mice were used to make the model cerebral artery occlusion/reperfusion (MCAO/R). The behavioral test was used to measure neurological deficit scores for evaluation of ischemic reperfusion damage of brain. The change of electroencephalograph (EEG) was monitored by Model SMUP-E Bio-electric Signals Processing System. The infarction area of brain was assessed in brain slices with 2% solution of 2,3,5-triphenyl tetrazolium chloride (TTC). Spectrophotometric assay was used to determine the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT) and lactate dehydrogenase (LDH), contents of malondialdehyde (MDA) and adenosine triphosphate (ATP) of the brain. RESULTS The results showed that LBP at doses of 20 and 40 mg/kg markedly decreased the neurological deficit scores and the infarction area in MCAO/R mice. At the same time, LBP significantly decreased MDA content, and increased SOD, GSH-Px, CAT, LDH activities in ischemic reperfusion brain. CONCLUSIONS These suggest that LBP might act as a potential neuroprotective agent against the cerebral reperfusion-induced injury in the brain through reducing lipid peroxides, scavenging free radicals, and improving the energy metabolism.
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Krause M, Lan ZJ, Li X, Nakajima S, Lei Z. Selective theca cell phosphatase and tensin homolog (tPten) mutant in mice causes PCOS-like morphology and reveals a role of the phosphatidylinositol 3 (PI3) kinase signal pathway in folliculogenesis. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.1791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kaddurah-Daouk R, Zhu H, Sharma S, Bogdanov M, Rozen SG, Matson W, Oki NO, Motsinger-Reif AA, Churchill E, Lei Z, Appleby D, Kling MA, Trojanowski JQ, Doraiswamy PM, Arnold SE. Alterations in metabolic pathways and networks in Alzheimer's disease. Transl Psychiatry 2013; 3:e244. [PMID: 23571809 PMCID: PMC3641405 DOI: 10.1038/tp.2013.18] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 12/07/2012] [Accepted: 01/01/2013] [Indexed: 02/07/2023] Open
Abstract
The pathogenic mechanisms of Alzheimer's disease (AD) remain largely unknown and clinical trials have not demonstrated significant benefit. Biochemical characterization of AD and its prodromal phase may provide new diagnostic and therapeutic insights. We used targeted metabolomics platform to profile cerebrospinal fluid (CSF) from AD (n=40), mild cognitive impairment (MCI, n=36) and control (n=38) subjects; univariate and multivariate analyses to define between-group differences; and partial least square-discriminant analysis models to classify diagnostic groups using CSF metabolomic profiles. A partial correlation network was built to link metabolic markers, protein markers and disease severity. AD subjects had elevated methionine (MET), 5-hydroxyindoleacetic acid (5-HIAA), vanillylmandelic acid, xanthosine and glutathione versus controls. MCI subjects had elevated 5-HIAA, MET, hypoxanthine and other metabolites versus controls. Metabolite ratios revealed changes within tryptophan, MET and purine pathways. Initial pathway analyses identified steps in several pathways that appear altered in AD and MCI. A partial correlation network showed total tau most directly related to norepinephrine and purine pathways; amyloid-β (Ab42) was related directly to an unidentified metabolite and indirectly to 5-HIAA and MET. These findings indicate that MCI and AD are associated with an overlapping pattern of perturbations in tryptophan, tyrosine, MET and purine pathways, and suggest that profound biochemical alterations are linked to abnormal Ab42 and tau metabolism. Metabolomics provides powerful tools to map interlinked biochemical pathway perturbations and study AD as a disease of network failure.
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Xiao W, Shaoping N, Shibin Q, Lei Z, Jianzeng D, Xiaohui L, Changsheng M. Basic fibroblast growth factor promotes in vivo homing and differentiation of mesenchymal stem cells by coronary venous retroperfusion. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Zhipei L, Kui P, Nan L, Hongwei D, Zhongwei J, Feng G, Lei Z. Strategy to fight clopidogrel resistance: a multiplex genetic variants investigation in Chinese population. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ming L, Ying Y, Quan C, Jianguo J, Lei Z, Yunzeng Z, Junbo G. Simvastatin suppressed HMGB1-RAGE axis and atherosclerosis via mevalonate pathway. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lei Z, Jian-gang L, Da-zhuoXiyuan S. The protective effect of perindopril on myocardium collagen during the early phase of ventricular remodeling after acute myocardial infarction in rats. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Xiao W, Shaoping N, Shibin Q, Lei Z, Jianzeng D, Xiaohui L, Changsheng M. Selective retrograde coronary venous perfusion with over-the-wire balloon: a new technique for cell transplantation. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Fuhai Z, Jiangang L, Xin W, Dawu Z, Peili W, Lei Z, Jianpeng D, Dazhuo S. The effect of zedoary essential components eluting stent on neointimal formation in a porcine restenosis model. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Linggeng Y, Yin L, Chenhu H, Junshan R, Lei Z, Li T. Abstract P4-06-21: Matrix Metalloproteinase 2 in Tumor Cell-Induced Platelet Aggregation: Regulation by Cryptotanshinone. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p4-06-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: A correlation exists between the ability of tumor cells to aggregate platelets and their tendency to metastasize. Tumor cell-induced platelet aggregation (TCIPA) facilitates the embolization of the vasculature with tumor cells and the formation of metastatic foci. It is well documentedthat matrix metalloproteinases (MMPs) play an integral part in tumor spread and the metastatic cascade.
Material and Methods: Therefore, we have examined the role of MMPs during TCIPA and its regulation by Cryptotanshinone in vitro. Human breast cancer cell line MCF-7 and MDA-MB-231 induced TCIPA in a concentration dependent manner that was monitored by aggregometry. This aggregation resulted in the release of MMP-2 from platelets and cancer cells, as measured by RT-PCR.
Results:MCF-7 cells released significantly more MMP-2 than MDA-MB-231 cells and were more efficacious in inducing TCIPA. Inhibition of MMP-2 with phenanthroline (1-1000 mM), a synthetic inhibitor of MMPs, and by neutralizing anti-MMP-2 antibody (10 mg/ml) reduced TCIPA induced by MCF-7 cells. TCIPA was abolished by simultaneous inhibition of platelet function with acetylsalicylic acid (100 mM; thromboxane pathway inhibitor), apyrase (250 mg/ml; ADP pathway inhibitor), and phenanthroline. Cryptotanshinone inhibited TCIPA and MMP-2 release from platelets and tumor cells.
Discussion:We conclude that (a) human Human breast cancer cells aggregate platelets via mechanism (s) that are mediated, in part, by MMP-2; (b) Cryptotanshinone inhibits TCIPA, in part, by attenuating the release of MMP-2.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P4-06-21.
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Jian-qun M, Lei Z, Lian-wen W, Yu-qin Z, Yu-hong Z. e0618 Effects of Rosuvastatin on plasma NO and ET-1 during myocardial ischaemia-reperfusion injury in rabbits. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Uzelac P, Li X, Lin J, Neese L, Lin L, Nakajima S, Bohler H, Lei Z. Dysregulation of Leptin and Testosterone Production and Their Receptor Expression in the Human Placenta with Gestational Diabetes Mellitus. Placenta 2010; 31:581-8. [DOI: 10.1016/j.placenta.2010.04.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 03/30/2010] [Accepted: 04/01/2010] [Indexed: 11/30/2022]
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Zhou M, Lei Z, Li H, Yi W, Zhang Z, Guo A. NMDA receptors-dependent plasticity in the phototaxis preference behavior induced by visual deprivation in young and adult flies. GENES BRAIN AND BEHAVIOR 2010; 9:325-34. [DOI: 10.1111/j.1601-183x.2009.00562.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lei Z, Deng P, Li Y, Xu ZC. Downregulation of Kv4.2 channels mediated by NR2B-containing NMDA receptors in cultured hippocampal neurons. Neuroscience 2010; 165:350-62. [PMID: 19857555 DOI: 10.1016/j.neuroscience.2009.10.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2009] [Revised: 10/14/2009] [Accepted: 10/20/2009] [Indexed: 12/29/2022]
Abstract
Somatodendritic Kv4.2 channels mediate transient A-type potassium currents (I(A)), and play critical roles in controlling neuronal excitability and modulating synaptic plasticity. Our studies have shown an NMDA receptor-dependent downregulation of Kv4.2 and I(A). NMDA receptors are heteromeric complexes of NR1 combined with NR2A-NR2D, mainly NR2A and NR2B. Here, we investigate NR2B receptor-mediated modulation of Kv4.2 and I(A) in cultured hippocampal neurons. Application of glutamate caused a reduction in total Kv4.2 protein levels and Kv4.2 clusters, and produced a hyperpolarized shift in the inactivation curve of I(A). The effects of glutamate on Kv4.2 and I(A) were inhibited by pretreatment of NR2B-selective antagonists. NR2B-containing NMDA receptors are believed to be located predominantly extrasynaptically. Like application of glutamate, selective activation of extrasynaptic NMDA receptors caused a reduction in total Kv4.2 protein levels and Kv4.2 clusters, which was also blocked by NR2B-selective antagonists. In contrast, specific stimulation of synaptic NMDA receptors had no effect on Kv4.2. In addition, the influx of Ca(2+) was essential for extrasynaptic modulation of Kv4.2. Calpain inhibitors prevented the reduction of total Kv4.2 protein levels following activation of extrasynaptic NMDA receptors. These results demonstrate that the glutamate-induced downregulation of Kv4.2 and I(A) is mediated by NR2B-containing NMDA receptors and is linked to proteolysis by calpain, which might contribute to the development of neuronal hyperexcitability and neurodegenerative diseases.
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Lei Z, Qingyi D, Feng G, Chen W, Hock RS, Changli W. Clinical study of mini-nutritional assessment for older Chinese inpatients. J Nutr Health Aging 2009; 13:871-5. [PMID: 19924346 DOI: 10.1007/s12603-009-0244-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2008] [Accepted: 12/08/2008] [Indexed: 10/19/2022]
Abstract
BACKGROUND Malnutrition is a common problem in older patients. Early detection of malnutrition is an important task in clinical practice. The MNA has become an extensively used tool to evaluate nutritional status in European countries and the United States. OBJECTIVE We evaluated the Mini-Nutritional Assessment (MNA) test and the short-form MNA (MNA-SF) test as screening tools for malnutrition in older Chinese inpatients and focused on finding an optimal cutoff point for MNA total score and MNA-SF score. DESIGN One hundred eighty-four older Chinese inpatients were enrolled in this study from July to August 2006. Nutritional assessment included MNA, anthropometric measurements, and biochemical markers. RESULTS According to the original cutoff point of the full MNA, 19.6% of those assessed were malnourished, 53.2% were at risk of malnutrition and 27.2% were well nourished. Correlations were found between MNA, MNA-SF and body mass index, triceps skinfold thickness, serum albumin, lymphocyte count, hemoglobin, lymphocyte ratio. With the most proper cutoff point lower than 19 indicating malnutrition, when using serum albumin (< 35.0 g/L) as the indicator, the sensitivity and specificity of the MNA total score were 0.6286 and 0.7466; when using BMI (< 18.5 kg/m2) as the indicator, the sensitivity and specificity were 0.8636 and 0.7469. The incidence rate of malnutrition was 32.6%. The most proper cutoff point of MNA-SF was lower than 12. CONCLUSION The MNA and MNA-SF were useful tools to identify older Chinese inpatients with malnutrition. However, the cutoff point of the MNA should be modulated for this population.
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Gurney B, McGurk M, Schilling C, Cascarini L, Lei Z. The implications of a positive sentinel node in head and neck cancer. Br J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.bjoms.2009.06.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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