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DU YQ, Liu HX, Liu CL, Dun YJ, Li Q, Yu LP, Liu SJ, Chen LL, Wang XF, Xu T. [Analysis of metabolic factors and relevance with the grade and stage in patients with renal cell carcinoma]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2016; 48:612-617. [PMID: 29263499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To investigate the association between metabolic factors, such as obesity, blood pressure, blood glucose, serum lipid profile, and the histopathological characteristics of renal cell carcinoma. METHODS The medical records of 382 consecutive renal cell carcinoma patients who underwent radical or partial nephrectomy at Peking University People's Hospital from January 2009 to January 2015 were retrospectively reviewed. Metabolic factors were collected from the records, including weight, body mass index, waist circumstance, blood pressure, fasting blood glucose, serum total triglyceride, serum total cholesterol, serum low-density lipoprotein-cholesterol and serum high-density lipoprotein-cholesterol. The patients were divided into different groups according to tumor grade, stage and diameter. Statistics analysis, such as t test, Mann-Whitney U test and Logistic analysis, were performed to investigate the association between metabolic factors and grade, stage and tumor diameter of renal cell carcinoma. RESULTS A total of 80 (20.94%) of the tumors were classified as high grade disease, 63 (16.49%) were classified as advanced disease and 153 (40.05%) tumor diameter more than 4 cm. The patients in high grade group were found to have lower high-density lipoprotein-cholesterol level than in low grade group (P=0.015), body mass index, total cholesterol and high-density lipoprotein-cholesterol were found to be lower in advanced disease than in localized disease (P=0.022, P=0.005 and P=0.006, respectively), and low-density lipoprotein-cholesterol was found to be lower in larger tumors (P=0.030). Other factors were comparable between the different groups. The results of Logistic analyses showed that, body mass index (OR=0.906, 95%CI: 0.852-0.986, P=0.023) and total cholesterol (OR=0.660, 95%CI: 0.492-0.884, P=0.005) were associated with the tumor stage, high-density lipoprotein- cholesterol level was significantly associated with tumor grade (OR=0.293, 95%CI: 0.108-0.797, P=0.016) and stage (OR=0.204, 95%CI: 0.065-0.635, P=0.006), and low-density lipoprotein-cholesterol level was significantly associated with tumor diameter (OR=0.756, 95%CI: 0.586-0.975, P=0.031). CONCLUSION The results of our study indicate that metabolic factors, especially obesity and serum lipid profile, are closely related with the histopathological characteristics of renal cell carcinoma.
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Zhang Q, Sun Q, Xiao G, Zeng J, Wang L, Chen L, Ma C. WE-FG-BRA-12: Research Work of the Radio-Dynamic Treatment Mechanism. Med Phys 2016. [DOI: 10.1118/1.4957912] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Liu H, Li Y, Liu CH, Liu C, Ge BW, Chen LL. Development of a Fluorescence Multiplex Amplification System with 24 Y-STR Loci. FA YI XUE ZA ZHI 2016; 32:180-183. [PMID: 29171735 DOI: 10.3969/j.issn.1004-5619.2016.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To establish a novel multiplex amplification system which comprises 24 Y-STR loci. METHODS otal 24 Y-STR gene loci, concluding DYS531, DYS630, DYS622, DYS552, DYS510, DYS449, DYS459a/b, DYS446, DYS443, DYS635, DYS587, DYS527a/b, DYS460, Y-GATA-A10, DYS520, DYS557, DYS522, DYS481, DYS570, DYS385a/b, DYS444, were chosen for establishing the fluorescence multiplex amplification system. The specificity, identity, sensitivity, balance of the amplification, anti-interference and accuracy of the system were detected and the gene diversity was investigated in the population of Guangdong. RESULTS No band was found in nonhuman and female samples that were tested by the established multiplex amplification system. The same genotyping results were obtained from different tissues of the same person. Complete profiles could be obtained from more than 0.1 ng of the standard sample 9948. The loss of alleles was found when the common inhibitors such as hemoglobin and calcium ion were added 120-200 μmol/L and 1.5-2.0 mmol/L respectively to the system which with a strong anti-interference to the indigo, humic acid and EDTA. The typing of 24 Y-STR system could give the reliable results when 146 unrelated male individuals were detected and compared with the Yfiler system parallelly. The haplotype diversity (HD) of the population in Guangdong reached 0.999 72 that was better than the result retained from Yfiler system, which the HD was 0.998 58. CONCLUSIONS The fluorescence amplification system with 24 Y-STR loci established in present study has a wildly application prospect and can be used for cases inspection, paternity tests and Y-STR database construction.
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Zhou TT, Quan LL, Chen LP, Du T, Sun KX, Zhang JC, Yu L, Li Y, Wan P, Chen LL, Jiang BH, Hu LH, Chen J, Shen X. SP6616 as a new Kv2.1 channel inhibitor efficiently promotes β-cell survival involving both PKC/Erk1/2 and CaM/PI3K/Akt signaling pathways. Cell Death Dis 2016; 7:e2216. [PMID: 27148689 PMCID: PMC4917657 DOI: 10.1038/cddis.2016.119] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 04/07/2016] [Accepted: 04/11/2016] [Indexed: 12/31/2022]
Abstract
Kv2.1 as a voltage-gated potassium (Kv) channel subunit has a pivotal role in the regulation of glucose-stimulated insulin secretion (GSIS) and pancreatic β-cell apoptosis, and is believed to be a promising target for anti-diabetic drug discovery, although the mechanism underlying the Kv2.1-mediated β-cell apoptosis is obscure. Here, the small molecular compound, ethyl 5-(3-ethoxy-4-methoxyphenyl)-2-(4-hydroxy-3-methoxybenzylidene)-7-methyl-3-oxo-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate (SP6616) was discovered to be a new Kv2.1 inhibitor. It was effective in both promoting GSIS and protecting β cells from apoptosis. Evaluation of SP6616 on either high-fat diet combined with streptozocin-induced type 2 diabetic mice or db/db mice further verified its efficacy in the amelioration of β-cell dysfunction and glucose homeostasis. SP6616 treatment efficiently increased serum insulin level, restored β-cell mass, decreased fasting blood glucose and glycated hemoglobin levels, and improved oral glucose tolerance. Mechanism study indicated that the promotion of SP6616 on β-cell survival was tightly linked to its regulation against both protein kinases C (PKC)/extracellular-regulated protein kinases 1/2 (Erk1/2) and calmodulin(CaM)/phosphatidylinositol 3-kinase(PI3K)/serine/threonine-specific protein kinase (Akt) signaling pathways. To our knowledge, this may be the first report on the underlying pathway responsible for the Kv2.1-mediated β-cell protection. In addition, our study has also highlighted the potential of SP6616 in the treatment of type 2 diabetes.
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Lu W, Chen LL, Lu Q, Sun SP, Lei YB, Chen XQ, Mi S, Mo LY. [Cortical auditory evoked potentials in congenital hearing impaired children with cochlear implants]. ZHONGHUA ER BI YAN HOU TOU JING WAI KE ZA ZHI = CHINESE JOURNAL OF OTORHINOLARYNGOLOGY HEAD AND NECK SURGERY 2016; 51:241-6. [PMID: 27095714 DOI: 10.3760/cma.j.issn.1673-0860.2016.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE By investigating the auditory cortical evoked potential in congenital hearing impaired children with cochlear implants, the association between central auditory development and the age of implantation was studied. METHODS P1-N1-P2 were recorded in 110 profound hearing impaired children, aged from 12 to 80 months old and being implanted with cochlear implants before the age of 5 years. Their implant using time ranged from just at the switch-on to 48 months. The stimuli were /m/, /t/, /g/, presented at 65 dB SPL in sound field. The presence rate of each wave was obtained and the relationship between P1 latency and implant age, the time of speech processor switch-on were analyzed. RESULTS The presence rate of P1, N1 and P2 was 66.4%, 15.5% and 12.7%, respectively. The presence of P1 was significantly higher than that of N1(χ(2)=228.542, P=0.00)and P2(χ(2)=257.438, P=0.00). There was no significant difference of P1 presence rate elicited by /m/, /t/ and /g/(64.1%, 66.9% and 68.3%, χ(2)=0.589, P=0.75). There existed no significant difference either among P1 latency(P=0.22)or amplitude(P=0.09) elicited by /m/, /t/ and /g/. There was significant difference between the implant age before and after 42-month-old regarding the proportion that entered the age-appropriate normal P1 latency range(P=0.02). No significant difference was found among groups of implant using time of 1, 2, 3 and 4 years in aspect of the proportion that entered the age-appropriate normal P1 latency range(P=1.00). CONCLUSIONS Compared with implanted after the age of 42-month-old children with prelingual hearing impairment younger than 5 years old, the ones implanted before 42-month-old have more chance for normal development for central auditory system. Once implanted before 42-month-old, the cortical auditory system restored its normal development as early as 1 year after implantation.
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Zhang Q, Sun Q, Xiao G, Zeng J, Wang L, Chen L, Ma C. EP-1912: The mechanism research of radio-dynamic treatment. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)33163-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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DU YQ, Liu HX, Liu CL, Dun YJ, Li Q, Yu LP, Liu SJ, Chen LL, Wang XF, Xu T. [Analysis of metabolic factors and relevance with the grade and stage in patients with renal cell carcinoma]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2016; 48:612-617. [PMID: 27538138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To investigate the association between metabolic factors, such as obesity, blood pressure, blood glucose, serum lipid profile, and the histopathological characteristics of renal cell carcinoma. METHODS The medical records of 382 consecutive renal cell carcinoma patients who underwent radical or partial nephrectomy at Peking University People's Hospital from January 2009 to January 2015 were retrospectively reviewed. Metabolic factors were collected from the records, including weight, body mass index, waist circumstance, blood pressure, fasting blood glucose, serum total triglyceride, serum total cholesterol, serum low-density lipoprotein-cholesterol and serum high-density lipoprotein-cholesterol. The patients were divided into different groups according to tumor grade, stage and diameter. Statistics analysis, such as t test, Mann-Whitney U test and Logistic analysis, were performed to investigate the association between metabolic factors and grade, stage and tumor diameter of renal cell carcinoma. RESULTS A total of 80 (20.94%) of the tumors were classified as high grade disease, 63 (16.49%) were classified as advanced disease and 153 (40.05%) tumor diameter more than 4 cm. The patients in high grade group were found to have lower high-density lipoprotein-cholesterol level than in low grade group (P=0.015), body mass index, total cholesterol and high-density lipoprotein-cholesterol were found to be lower in advanced disease than in localized disease (P=0.022, P=0.005 and P=0.006, respectively), and low-density lipoprotein-cholesterol was found to be lower in larger tumors (P=0.030). Other factors were comparable between the different groups. The results of Logistic analyses showed that, body mass index (OR=0.906, 95%CI: 0.852-0.986, P=0.023) and total cholesterol (OR=0.660, 95%CI: 0.492-0.884, P=0.005) were associated with the tumor stage, high-density lipoprotein- cholesterol level was significantly associated with tumor grade (OR=0.293, 95%CI: 0.108-0.797, P=0.016) and stage (OR=0.204, 95%CI: 0.065-0.635, P=0.006), and low-density lipoprotein-cholesterol level was significantly associated with tumor diameter (OR=0.756, 95%CI: 0.586-0.975, P=0.031). CONCLUSION The results of our study indicate that metabolic factors, especially obesity and serum lipid profile, are closely related with the histopathological characteristics of renal cell carcinoma.
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Chapman J, Roddy E, Chen L, Westhoff G, Brooks R, Ueda S, Chen L. An enhanced recovery pathway decreases length of hospital stay in gynecologic oncology patients undergoing minimally invasive surgery. Gynecol Oncol 2015. [DOI: 10.1016/j.ygyno.2015.07.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mamun K, Ngyuen M, Chen L. P-026: Impact of falls and adverse drug events on health resource utilization among older adult Singaporeans. Eur Geriatr Med 2015. [DOI: 10.1016/s1878-7649(15)30129-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sun JC, Xu M, Lu JL, Bi YF, Mu YM, Zhao JJ, Liu C, Chen LL, Shi LX, Li Q, Yang T, Yan L, Wan Q, Wu SL, Liu Y, Wang GX, Luo ZJ, Tang XL, Chen G, Huo YN, Gao ZN, Su Q, Ye Z, Wang YM, Qin GJ, Deng HC, Yu XF, Shen FX, Chen L, Zhao LB, Wang TG, Lai SH, Li DH, Wang WQ, Ning G. Associations of depression with impaired glucose regulation, newly diagnosed diabetes and previously diagnosed diabetes in Chinese adults. Diabet Med 2015; 32:935-43. [PMID: 25439630 DOI: 10.1111/dme.12649] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/25/2014] [Indexed: 12/29/2022]
Abstract
AIM To examine the association between depression and impaired glucose regulation, newly diagnosed diabetes and previously diagnosed diabetes in middle-aged and elderly Chinese people, and whether depression was associated with different treatment regimens or durations of diabetes. METHODS A cross-sectional study was performed among 229,047 adults living in the community aged ≥ 40 years from 25 centres in China. The self-reported depression rating scale Patient Health Questionnaire 9 (PHQ-9) was used to diagnose probable and sub-threshold depression. Glucose metabolism status was determined according to World Health Organization 1999 diagnostic criteria. RESULTS The numbers of participants with normal glucose regulation, impaired glucose regulation, newly diagnosed diabetes and previously diagnosed diabetes were 120,458, 59,512, 24,826 and 24,251, respectively. The prevalence of sub-threshold depression in the total sample of participants was 4.8% (4.8%, 4.8%, 4.4% and 5.6% from normal glucose regulation to previously diagnosed diabetes, respectively), and the prevalence of probable depression was 1.1% (1.1%, 1.0%, 0.9% and 1.8% from normal glucose regulation to previously diagnosed diabetes, respectively). Compared with participants with normal glucose regulation, those with previously diagnosed diabetes had increased odds of probable depression [odds ratio (OR) = 1.61, 95% confidence interval (CI) 1.39-1.87] and sub-threshold depression (OR = 1.14, 95% CI 1.06-1.24), after adjustment for multiple confounding factors. Newly diagnosed diabetes or impaired glucose regulation was not associated with depression. Among those with previously diagnosed diabetes, insulin treatment was associated with greater odds of depression compared with no treatment or oral anti-diabetic medicine. CONCLUSION Previously diagnosed diabetes, but not newly diagnosed diabetes or impaired glucose regulation, was associated with a higher prevalence of depression. Patients receiving insulin were more likely to have depression than those not receiving treatment or being treated with oral anti-diabetic medicine.
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Wang S, Dai Y, Chen L, Jiang T, Zheng M, Li C, Chen Y, Lin W, Zhang J, Jiang J. Effect of IL-1β, IL-8, and IL-10 polymorphisms on the development of myocardial infarction. GENETICS AND MOLECULAR RESEARCH 2015; 14:12016-21. [DOI: 10.4238/2015.october.5.14] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ong YSP, Chen LL, Wong JA, Gunawan Y, Goh WJ, Tan MC, Lee SB. Evaluating the Impact of Drug Dispensing Systems on the Safety and Efficacy in a Singapore Outpatient Pharmacy. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A791-A792. [PMID: 27202953 DOI: 10.1016/j.jval.2014.08.440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Ong KY, Chng SGJ, Chen LL, Cheen HHM, Lim SH, Lim PS, Ng SM, Chang WT. Evaluation of a Multidisciplinary Home-Based Medication Review Program for Elderly Singaporeans. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A791. [PMID: 27202954 DOI: 10.1016/j.jval.2014.08.435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Cheen HHM, Ong KY, Lim SH, Chng SGJ, Chen LL, Lim PS, Ng SM, Chang WT. Effects of A Multidisciplinary Home-Based Medication Review Program On Hospital Admissions In Older Adult Singaporeans. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A506. [PMID: 27201543 DOI: 10.1016/j.jval.2014.08.1538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Lim SH, Chen LL, Tee FMH, Ngan AMO, Kong MC. Evaluation Of The Economic Impact Of Specialist Outpatient Clinic Pharmacy Interventions In A Tertiary Institution, Singapore. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A790. [PMID: 27202948 DOI: 10.1016/j.jval.2014.08.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Chen LL, Ch'ng SHA, Shafie AA, Hasali MA, Tagiisuran B. Prevalence and Predictors of Clinically Undiagnosed Cognitive Impairment Among Older Residents of Nursing Homes in Association with HRQOL. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A770. [PMID: 27202837 DOI: 10.1016/j.jval.2014.08.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Zuo FL, Feng XJ, Chen LL, Chen SW. Identification and partial characterization of lactic acid bacteria isolated from traditional dairy products produced by herders in the western Tianshan Mountains of China. Lett Appl Microbiol 2014; 59:549-56. [PMID: 25082064 DOI: 10.1111/lam.12313] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 07/03/2014] [Accepted: 07/28/2014] [Indexed: 11/26/2022]
Abstract
UNLABELLED Thirty strains of lactic acid bacteria (LAB) were isolated from herders' traditional dairy products collected from Xinjiang, China. The species Lactobacillus, Lactococcus, Enterococcus, Pediococcus and Leuconostoc were identified by 16S ribosomal RNA gene sequencing analysis and conventional observation. The strains' fermentation characteristics, including milk acidification, proteolysis, autolysis, antimicrobial activity and diacetyl production, were assayed and compared. Strains NL24 and NL31 showed the highest proteolytic activity-2·75 and 2·08 mmol Phe l(-1) milk, respectively. Strains C, NL41, SW2, Z3-11, NL42 and Z2-91 had high autolytic activity. In addition, most of the wild strains produced diacetyl, half of them to high levels. This study provides a clue to LAB biodiversity in traditional dairy foods produced by herders in the western Tianshan Mountains. High-performing strains should be further evaluated for practical application in value-added fermented dairy products. SIGNIFICANCE AND IMPACT OF THE STUDY Our results reveal a certain variety of lactic acid bacteria (LAB) in traditional dairy products from Xinjiang. Some of the LAB strains, such as Lactobacillus rhamnosus NL24 and Lactobacillus paracasei SW2, possess excellent functional properties and have the potential for application in indigenous fermented dairy products. Performance of the newly isolated strains in cheese or yogurt manufacturing was further evaluated. Application of the high-performing strains to enrich the flavour of fermented dairy products is highly desirable and holds great commercial potential.
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Zhu XQ, Hong HS, Lin XH, Chen LL, Li YH. Changes in cardiac aldosterone and its synthase in rats with chronic heart failure: an intervention study of long-term treatment with recombinant human brain natriuretic peptide. ACTA ACUST UNITED AC 2014; 47:646-54. [PMID: 25014176 PMCID: PMC4165291 DOI: 10.1590/1414-431x20143474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Accepted: 04/10/2014] [Indexed: 11/22/2022]
Abstract
The physiological mechanisms involved in isoproterenol (ISO)-induced chronic heart
failure (CHF) are not fully understood. In this study, we investigated local changes
in cardiac aldosterone and its synthase in rats with ISO-induced CHF, and evaluated
the effects of treatment with recombinant human brain natriuretic peptide (rhBNP).
Sprague-Dawley rats were divided into 4 different groups. Fifty rats received
subcutaneous ISO injections to induce CHF and the control group (n=10) received equal
volumes of saline. After establishing the rat model, 9 CHF rats received no further
treatment, rats in the low-dose group (n=8) received 22.5 μg/kg rhBNP and those in
the high-dose group (n=8) received 45 μg/kg rhBNP daily for 1 month. Cardiac function
was assessed by echocardiographic and hemodynamic analysis. Collagen volume fraction
(CVF) was determined. Plasma and myocardial aldosterone concentrations were
determined using radioimmunoassay. Myocardial aldosterone synthase (CYP11B2) was
detected by quantitative real-time PCR. Cardiac function was significantly lower in
the CHF group than in the control group (P<0.01), whereas CVF, plasma and
myocardial aldosterone, and CYP11B2 transcription were significantly higher than in
the control group (P<0.05). Low and high doses of rhBNP significantly improved
hemodynamics (P<0.01) and cardiac function (P<0.05) and reduced CVF, plasma and
myocardial aldosterone, and CYP11B2 transcription (P<0.05). There were no
significant differences between the rhBNP dose groups (P>0.05). Elevated cardiac
aldosterone and upregulation of aldosterone synthase expression were detected in rats
with ISO-induced CHF. Administration of rhBNP improved hemodynamics and ventricular
remodeling and reduced myocardial fibrosis, possibly by downregulating CYP11B2
transcription and reducing myocardial aldosterone synthesis.
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Yuen D, Leu R, Tse J, Wang S, Chen LL, Chen L. Novel characterization of bEnd.3 cells that express lymphatic vessel endothelial hyaluronan receptor-1. Lymphology 2014; 47:73-81. [PMID: 25282873 PMCID: PMC4636729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Murine bEnd.3 endothelioma cell line has been widely used in vascular research and here we report the novel finding that bEnd.3 cells express lymphatic vessel endothelial hyaluronan receptor-1 (LYVE-1) and vascular endothelial growth factor receptor-3 (VEGFR-3). Moreover, these cells express progenitor cell markers of Sca-1 and CD133. Upon stimulation with tumor necrosis factor-alpha (TNF-alpha), the bEnd.3 cells demonstrate enhanced formation of capillary-type tubes, which express LYVE-1. As the bEnd.3 cell line is derived from murine endothelioma, we further examined human tissues of endothelioma and identified lymphatic vessels in the tumor samples which express both LYVE-1 and podoplanin. Moreover, a significantly higher number of lymphatic vessels were detected in the endothelioma samples compared with normal control. Taken together, this study not only redefines bEnd.3 cells for vascular research, but also indicates a broader category of human diseases that are associated with lymphatics, such as endothelioma.
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Zhang WJ, Chen LL, Zheng J, Lin L, Zhang JY, Hu X. Association of adult weight gain and nonalcoholic fatty liver in a cross-sectional study in Wan Song Community, China. Braz J Med Biol Res 2014; 47:151-6. [PMID: 24519131 PMCID: PMC4051179 DOI: 10.1590/1414-431x20133058] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 09/12/2013] [Indexed: 02/07/2023] Open
Abstract
Our objective was to examine associations of adult weight gain and nonalcoholic fatty liver disease (NAFLD). Cross-sectional interview data from 844 residents in Wan Song Community from October 2009 to April 2010 were analyzed in multivariate logistic regression models to examine odds ratios (OR) and 95% confidence intervals (CI) between NAFLD and weight change from age 20. Questionnaires, physical examinations, laboratory examinations, and ultrasonographic examination of the liver were carried out. Maximum rate of weight gain, body mass index, waist circumference, waist-to-hip ratio, systolic blood pressure, diastolic blood pressure, fasting blood glucose, cholesterol, triglycerides, uric acid, and alanine transaminase were higher in the NAFLD group than in the control group. HDL-C in the NAFLD group was lower than in the control group. As weight gain increased (measured as the difference between current weight and weight at age 20 years), the OR of NAFLD increased in multivariate models. NAFLD OR rose with increasing weight gain as follows: OR (95%CI) for NAFLD associated with weight gain of 20+ kg compared to stable weight (change <5 kg) was 4.23 (2.49-7.09). Significantly increased NAFLD OR were observed even for weight gains of 5-9.9 kg. For the "age 20 to highest lifetime weight" metric, the OR of NAFLD also increased as weight gain increased. For the "age 20 to highest lifetime weight" metric and the "age 20 to current weight" metric, insulin resistance index (HOMA-IR) increased as weight gain increased (P<0.001). In a stepwise multivariate regression analysis, significant association was observed between adult weight gain and NAFLD (OR=1.027, 95%CI=1.002-1.055, P=0.025). We conclude that adult weight gain is strongly associated with NAFLD.
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Chen KH, Chen LL, Li WG, Fang Y, Huang GY. Maternal MTHFR C677T polymorphism and congenital heart defect risk in the Chinese Han population: a meta-analysis. GENETICS AND MOLECULAR RESEARCH 2013; 12:6212-9. [PMID: 24338416 DOI: 10.4238/2013.december.4.8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Numerous studies have evaluated the association between the maternal C677T polymorphism in the methylenetetrahydrofolate reductase (MTHFR) gene and congenital heart defect (CHD) risk in the Chinese Han population. However, the specific association is still controversial. Six separate studies with 1089 subjects in the Chinese Han population on the relationship between the C677T polymorphism and CHDs were analyzed by meta-analysis, upon database search. The fixed-effect model or random-effect model was selected to calculate the pooled odds ratio (ORs) and its corresponding 95% confidence interval (95%CI) when appropriate. The Begg test was used to measure publication bias. Sensitivity analyses were performed to insure authenticity of the outcome. Meta-analysis of the results showed significant associations between the maternal C677T polymorphism and CHD risk (CC vs TT: OR = 0.65, 95%CI = 0.44-0.96). Limiting the analysis to the studies with controls in the Hardy-Weinberg equilibrium and the results indicate that the meta-analysis was statistically significant. Results of Begg's funnel plot showed that there was no publication bias (all P > 0.05). The present meta-analysis suggested that the maternal C677T polymorphism is a risk factor for CHDs in the Chinese Han population.
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Chen LL, Liebman TN, Soriano RP, Dusza SW, Halpern AC, Marghoob AA. One-year follow-up of dermoscopy education on the ability of medical students to detect skin cancer. Dermatology 2013; 226:267-73. [PMID: 23797047 DOI: 10.1159/000350571] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Accepted: 03/04/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Learning skin cancer detection skills is important, yet many medical schools lack a standardized skin cancer examination (SCE) curriculum. OBJECTIVE To determine medical students' skills in discriminating benign from malignant skin lesions on a 10-item image-based test one year after receiving a SCE intervention. METHODS Cohort 1 received SCE teaching only. Cohort 2 received SCE teaching with dermoscopy tutorial, and a dermatoscope. The same test was given to assess students post-intervention and one year later. RESULTS 43% (n = 145) and 38% (n = 143) of cohorts 1 and 2, respectively, participated one year later. Both cohorts improved or maintained their scores to correctly classify all lesions from post-intervention to one-year follow-up. After one year, cohort 2 maintained higher scores for successful identification of both benign and malignant lesions as compared to cohort 1. CONCLUSION Medical students receiving a SCE intervention can improve their diagnostic skills after one year, especially with the aid of dermoscopy.
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Lu H, Chen LL, Jiang XY, Mo Y, Ling YH, Sun LZ. Temporal and spatial expression of podocyte-associated molecules are accompanied by proteinuria in IgA nephropathy rat model. Physiol Res 2012; 62:35-45. [PMID: 23173680 DOI: 10.33549/physiolres.932380] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
We used a rat model to assess the role of nephrin, podocin, and desmin in the pathogenesis of IgA nephropathy (IgAN). A rat IgAN model was established by administration of BSA, CCl(4), and lipopolysaccharide (LPS) and compared with healthy control rats. Urinary protein, urine red blood cells, and biochemical parameters were measured for 12 weeks. Renal morphology and ultrastructure were examined by light and electron microscopy. Immunofluorescence was used to assess IgA deposition in the glomeruli and to measure expression of nephrin, podocin, and desmin. Real-time quantitative PCR was used to measure expression of nephrin, podocin, and desmin mRNAs. IgAN rats developed proteinuria at week-6 and this worsened over time. Pathological changes were evident under light microscopy at week-8 and under electron microscopy at week-4. Immunofluorescence analysis showed deposition of IgA in the kidneys of IgAN rats, but not control rats. IgAN rats had increased expression of glomerular podocin, nephrin, and desmin mRNAs and proteins at week-4. The expression of nephrin, podocin and desmin proteins and the expression of podocin and desmin mRNAs preceded the increase in urinary protein. Taken together, our study of a rat model of IgAN indicates that changes in the expression and distribution of nephrin, podocin, and desmin precede and may cause foot process fusion and proteinuria.
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Barsoum J, Moore C, Seery J, Daikh Y, Chen LL, Corina K, Moy P, Brown R, Shapiro R, Taylor F, Androphy E, Pepinsky B, Fawell S. Tat-mediated delivery of heterologous macromolecules into living cells. Restor Neurol Neurosci 2012; 8:11-2. [PMID: 21551797 DOI: 10.3233/rnn-1995-81203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Chen HZ, Xi N, Lai KWC, Chen LL, Yang RG, Song B. Gate dependent photo-responses of carbon nanotube field effect phototransistors. NANOTECHNOLOGY 2012; 23:385203. [PMID: 22948041 DOI: 10.1088/0957-4484/23/38/385203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Gate dependent photoconductivity of carbon nanotube (CNT) field effect phototransistors (FEPs) was systematically investigated in this study. The photo-response comparisons of CNT FEPs with symmetric and asymmetric metal structures connecting to the same CNT revealed that the gate effect contributed to a sensitivity improvement with a lower dark current, a higher photocurrent, and an enhanced photovoltage. A functionalized asymmetric FEP, fabricated by partially doping the CNT utilizing a polyethylene imine (PEI) polymer, verified that FEPs delivered a better performance by using asymmetric structures. A multi-gate FEP, with three pairs of side-gates that can electrostatically dope different sections of a CNT independently, was fabricated to examine the gate structure dependent photo-responses. Experimental measurements showed an unconventional photocurrent improvement that was weakly dependent on the gate location, which was attributed to the unique charge distribution of one-dimensional semiconductors.
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