Jun-jun Wang

Nanjing University, Nanjing, Jiangsu Sheng, China

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Publications (10)17.97 Total impact

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    ABSTRACT: AIMS: To examine the serum levels of β2-glycoprotein I-lipoprotein(a) complexes [β2-GPI-Lp(a)] in type 2 diabetes mellitus (T2DM) patients and evaluate the association of the complexes with complications in T2DM. METHODS: Fifty two T2DM patients (22 with complications and 30 free of complications) and 52 age/gender-matched healthy controls were studied. Serum concentrations of β2-GPI-Lp(a) and ox-Lp(a) were measured by "sandwich" ELISAs and their associations with complications were examined using multiple linear regression. RESULTS: Mean serum β2-GPI-Lp(a) (1.19±0.30U/mL vs. 0.89±0.20U/mL, p<0.001) and ox-Lp(a) concentrations (13.34±11.73mg/L vs. 5.26±3.34mg/L, p<0.001) were both significantly higher in T2DM than in controls. The area under the ROC curve (AUC) for β2-GPI-Lp(a) and ox-Lp(a) was 0.725 and 0.738, respectively. β2-GPI-Lp(a) levels were markedly higher in patients with complications than those without complication (1.39±0.28U/mL vs. 1.04±0.31U/mL, p<0.01), whereas no marked difference was found in ox-Lp(a). In multivariate regression analysis, the association between β2-GPI-Lp(a) and complications remained significant (β=0.249, p<0.05, respectively) after adjustments were made for other traits. CONCLUSIONS: Elevated β2-GPI-Lp(a) may reflect chronic underlying pathophysiological processes involved in development of complications of T2DM.
    Diabetes research and clinical practice 03/2013; · 2.74 Impact Factor
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    ABSTRACT: To investigate retinol-binding protein 4 (RBP4), small dense low-density lipoprotein cholesterol (sdLDL-C) and oxidized low-density lipoprotein (ox-LDL) levels and their associations in dyslipidemia subjects. We determined RBP4, sdLDL-C, ox-LDL levels in 150 various dyslipidemia subjects and 50 controls. The correlation analysis and multiple linear regression analysis were performed. The RBP4, sdLDL-C and ox-LDL levels were found increased in various dyslipidemia subjects. The sdLDL-C levels were positively correlated with RBP4 (r=0.273, P=0.001) and ox-LDL (r=0.273, P=0.001). RBP4 levels were also correlated with ox-LDL (r=0.167, P=0.043). The multiple regression analysis showed that only sdLDL-C was a significant independent predictor for RBP4 (β coefficient=0.219, P=0.009; adjusted R(2)=0.041) and ox-LDL (β coefficient=0.253, P=0.003; adjusted R(2)=0.057) levels, respectively. The independent associations of sdLDL-C with RBP4 and ox-LDL were observed in dyslipidemia subjects. RBP4 may play an important role in lipid metabolism of atherosclerosis, particularly in formation of sdLDL.
    Clinical biochemistry 03/2012; 45(9):619-22. · 2.02 Impact Factor
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    ABSTRACT: D-dimer and C-reactive protein are of diagnostic and predictive values in patients have thrombotic tendency, such as vascular thrombosis, coronary artery disease and aortic dissection. However, the comparative study in these biomarkers between the patients with acute aortic dissection and coronary artery disease has not been sufficiently elucidated. Consecutive surgical patients for acute type A aortic dissection (20 patients), aortic aneurysm (nine patients) or coronary artery disease (20 patients) were selected into this study. Plasma from preoperative blood samples and supernatant of aortic homogenate of the surgical specimens were detected for D-dimer and hypersensitive C-reactive protein (hs-CRP). Plasma D-dimer and hs-CRP values in type A aortic dissection or aortic aneurysm were much higher than in coronary artery disease patients or the healthy control (for D-dimer, aortic dissection: coronary artery disease, 0.4344 ± 0.2958 µg/ml vs. 0.0512 ± 0.0845 µg/ml, P < 0.0001; aortic dissection: healthy control, 0.4344 ± 0.2958 µg/ml vs. 0.1250 ± 0.1295 µg/ml, P = 0.0005; aortic aneurysm: coronary artery disease, 0.4200 ± 0.4039 µg/ml vs. 0.0512 ± 0.0845 µg/ml, P = 0.0013; and aortic aneurysm: healthy control, 0.4200 ± 0.4039 µg/ml vs. 0.1250 ± 0.1295 µg/ml, P = 0.0068; and for hs-CRP, aortic dissection: coronary artery disease, 4.400± 3.004 mg/L vs. 1.232±0.601 mg/L, P < 0.0001; aortic dissection:healthy control, 4.400 ± 3.004 mg/L vs. 0.790 ± 0.423 mg/L, P < 0.0001; aortic aneurysm: coronary artery disease, 2.314 ± 1.399 mg/L vs. 1.232 ± 0.601 mg/L, P = 0.0084; aortic aneurysm: healthy control, 2.314 ± 1.399 mg/L vs. 0.790 ± 0.423 mg/L, P = 0.0002; and coronary artery disease: healthy control, 1.232 ± 0.601 mg/L vs. 0.790 ± 0.423 mg/L, P = 0.0113). Besides, there were close correlations between plasma D-dimer and hs-CRP in overall (Y = 4.8798X + 0.8138, r² = 0.4497, r = 0.671, P < 0.001), aortic dissection (Y = 2.6298X + 1.2098, r² = 0.5762, r = 0.759, P < 0.001), and aortic aneurysm (Y = 7.1341X + 1.3006, r² = 0.4935, r = 0.7025, P = 0.048) groups rather than in the coronary artery disease or healthy control subjects. In addition, there were no significant differences between D-dimer and hs-CRP values of the aortic supernatant among groups except for undetectable D-dimer in the aortic supernatant of the coronary artery disease group. The patients with acute aortic dissection and aortic aneurysm may reflect the extensive inflammatory reaction and severe coagulopathies in the patients with acute type A aortic dissection, and thoracic aortic aneurysm in comparison to the coronary patients and healthy control individuals. The detections after onset in the patients with acute chest pain may help making a differential diagnosis between the aortopathies and ischemic heart disease. The scanty significance of the tissue biomarkers may preclude their diagnostic value in clinical practice.
    Brazilian Journal of Cardiovascular Surgery 12/2011; 26(4):573-81.
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    ABSTRACT: To investigate lipoprotein(a) [Lp(a)], oxidized Lp(a) [ox-Lp(a)] and Lp(a) immune complex [Lp(a)-IC] levels in children with nephrotic syndrome (NS). Plasma Lp(a), ox-Lp(a) and Lp(a)-IC levels were determined in 106 NS children in acute-period, 42 in remission and 155 controls. Lp(a) and ox-Lp(a) levels were significantly higher in acute-period and remission NS than in control. Ox-Lp(a) levels in acute-period NS were higher than in remission. Lp(a)-IC levels in acute-period NS were higher than in control. Lp(a), ox-Lp(a) and Lp(a)-IC were found negatively related with albumin in NS. Lp(a), ox-Lp(a) and Lp(a)-IC levels decreased after use of steroid therapy. Multiple linear regression analysis found relative change of albumin, creatinine, urea, triglyceride and high density lipoprotein cholesterol accounted for 78.9% of variation in ox-Lp(a). Lp(a), ox-Lp(a) and Lp(a)-IC levels were increased in NS children, which may play an important role in the processes of atherosclerosis.
    Clinical biochemistry 11/2011; 45(1-2):101-5. · 2.02 Impact Factor
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    ABSTRACT: To investigate the possible mechanisms and association of increased complexes of β(2)-glycoprotein I with lipoprotein(a) [β(2)-GPI-Lp(a)] levels with the presence and extent of coronary artery disease (CAD). β(2)-GPI-Lp(a) levels were measured in 116 patients with acute coronary syndromes (ACS), 72 patients with stable CAD and 100 control subjects. Compared to the control, β(2)-GPI-Lp(a) levels (expressed after logarithmically transformation: ACS, 0.22±0.45 U/mL; stable CAD, 0.05±0.55 U/mL; control, -0.31±0.61 U/mL) significantly increased in both patients with ACS (p <0.001) and stable CAD (p <0.001). Univariate logistic regression analysis of risk factors revealed that the presence of β(2)-GPI-Lp(a), ox-Lp(a) or Lp(a) was a strong risk factor for stable CAD [β(2)GPI-Lp(a), OR 3.17, 95% CI 1.65, 6.07; ox-Lp(a), OR 2.54, 95% CI 1.33, 4.85; Lp(a), OR 3.00, 95% CI 1.56, 5.75; respectively], and especially for ACS [β(2)-GPI-Lp(a), OR 5.38, 95% CI 2.97, 9.74; ox-Lp(a), OR 7.55, 95% CI 4.12, 13.84; Lp(a), OR 4.33, 95% CI 2.40, 7.80; respectively]. In multivariate analysis, adjusting for age, sex and plasma lipid levels, the presence of β(2)-GPI-Lp(a) or Lp(a) was a risk factor for both stable CAD and ACS. Ox-Lp(a) was a risk factor only for ACS, while not for stable CAD. β(2)-GPI-Lp(a) levels were found to be positively associated with Lp(a), ox-Lp(a), maximal stenosis and a number of vessel diseases in patients with ACS or stable CAD, respectively. Multiple linear regression analysis found that ox-Lp(a) and maximal stenosis accounted for 46.2% of the variation in β(2)-GPI-Lp(a) levels. Elevated levels of β(2)-GPI-Lp(a) are associated with the presence and severity of CAD, and may be a strong risk factor for atherosclerosis.
    Journal of atherosclerosis and thrombosis 11/2011; 19(1):81-9. · 2.93 Impact Factor
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    ABSTRACT: To investigate possible changes of native and oxidized lipoprotein(a) [ox-Lp(a)] levels after percutaneous coronary intervention (PCI). Lp(a), ox-Lp(a), and Lp(a) immune complexes (IC) and autoantibody levels were studied in 111 patients with acute coronary syndrome (ACS) and 68 patients with stable coronary artery disease (CAD) before and after PCI. Compared with pre-PCI, Lp(a), ox-Lp(a), and Lp(a)-IC levels acutely increased, while the autoantibody decreased in both the ACS and stable CAD patients. They all returned toward baseline by 1 to 2 days. The absolute change of ox-Lp(a) was found positively related with both the diameter of stenosis (R=0.273, P=0.004) and the number of vessel disease (R=0.312, P=0.001) in the ACS patients, while not in the stable CAD patients. PCI results in acute plasma increases of ox-Lp(a) and Lp(a). Ox-Lp(a) may be present in ruptured or permeable plaques and be released into the circulation by PCI.
    Clinical biochemistry 09/2010; 43(13-14):1107-11. · 2.02 Impact Factor
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    ABSTRACT: To evaluate clinical value of oxidized lipoprotein(a) [ox-Lp(a)] levels. Ox-Lp(a) were measured by 2 ELISAs using antibodies against ox-Lp(a) [ox-Lp(a)1] or oxidized low-density lipoprotein [ox-Lp(a)2], and studied in 161 acute coronary syndromes (ACS) patients, 114 stable coronary artery disease (CAD) and 100 control subjects. Ox-Lp(a)1 was found related with ox-Lp(a)2 (r=0.864, P=0.000). Controlling for plasma lipids, Lp(a) and clinical characteristics, odds ratios of ox-Lp(a)1 on ACS and stable CAD were 5.06 (95% confidence interval 1.82-14.04) and 2.20 (0.78-6.22); those of ox-Lp(a)2 were 3.37 (1.07-10.63) and 1.35 (0.41-4.48), respectively. Receiver-operating characteristic curve analysis confirmed that performances of ox-Lp(a)1 were significantly superior to those for ox-Lp(a)2 in ACS (area: 0.803 vs. 0.723, P<0.001) and stable CAD (area: 0.670 vs. 0.607, P<0.01). Ox-Lp(a) levels using antibodies against ox-Lp(a) may represent a better risk marker than those using antibodies against oxidized low-density lipoprotein for ACS and stable CAD.
    Clinical biochemistry 04/2010; 43(6):571-5. · 2.02 Impact Factor
  • Dong-Mei Niu, Jun-Jun Wang
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    ABSTRACT: Sexual reproduction is marked by the fusion of the sperm cell with the oocyte during fertilization to produce the diploid zygote, in which the lipids in the sperm plasma membrane play an important role. Due to the loss of most cell organelles and DNA transcription, spermatozoa lack protein expression and vesicular transport. However, the lipids of the sperm plasma membrane undergo complicated dynamic changes, which may facilitate the capacitation, binding with zona pellucida, acrosome reaction and fusion of the sperm cell with the oocyte. This paper summarizes the progress in the studies of the lipids in the sperm plasma membrane, their composition, structure, peroxidation, metabolism and role in fertilization.
    Zhonghua nan ke xue = National journal of andrology 08/2009; 15(7):651-5.
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    ABSTRACT: To investigate possible mechanisms and association of increased oxidized Lp(a) [ox-Lp(a)] levels with presence and extent of acute coronary syndromes (ACS). Ox-Lp(a) levels were studied in 96 patients with ACS, 89 patients with stable coronary artery disease (CAD), and 100 control subjects. Compared to control, ox-Lp(a) levels increased in stable CAD patients (P<0.001), and especially in ACS (P<0.001) (ACS, 16.29+/-13.80 microg/ml; stable CAD, 10.04+/-10.32 microg/ml; control, 7.10+/-9.16 microg/ml). The ratio of ox-Lp(a) to Lp(a) was higher in the ACS than those in the stable CAD (P<0.05) and control (P<0.001). Ox-Lp(a) levels were found associated with a graded increase in extent of angiographically documented CAD in the ACS (R=0.275, P=0.007), while not in the stable CAD (R=0.090, P=0.402). Multiple linear regression analysis found ox-Lp(a) (beta=0.271, P=0.019), age (beta=0.244, P=0.038) and TG (beta=0.213, P=0.070) accounted for 11.1% of the variation in the extent of angiographically documented CAD in ACS patients; Lp(a) (beta=0.415, P=0.000) and extent of CAD (beta=0.193, P=0.071) accounted for 21.5% of that in ox-Lp(a) levels. Elevated ox-Lp(a) levels are associated with presence and severity of ACS, and may be useful for identification of patients with ACS.
    Clinica chimica acta; international journal of clinical chemistry 07/2009; 408(1-2):79-82. · 2.54 Impact Factor
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    ABSTRACT: We measured and analysed serum and urinary lipoprotein(a) [Lp(a)] in 73 patients with various renal diseases, and 168 control subjects. the results revealed that serum Lp(a) levels were significantly elevated in patients with mesangial proliferative glomerulonephritis, membranous nephropathy, chronic renal failure and diabetic nephropathy, except patients with IgA nephropathy (IgAN) with gross haematuria. Serum Lp(a) concentrations were found to be significantly correlated with serum albumin (r=−0.5033, P<0.001) and urinary protein excretion (r= 0.3541, P<0.005), while not with serum creatinine (r=−0.0144, P >0.05). Patients with selective urinary protein excretion had a lower serum Lp(a) level than those with non-selective urinary protein excretion. the correlation between serum albumin and serum Lp(a) levels remained significant (P<0.001) after adjustment for serum creatinine, urinary protein excretion and the selectivity of urinary protein by multivariate regression analysis. Urinary Lp(a) excretion was decreased and related to the serum creatinine level (r=−0.312, P<0.01). Our conclusion is that renal patients with proteinuria and hypoalbuminemia tend to have elevated levels of Lp(a) which are more significantly correlated to serum albumin levels than other parameters such as serum 24-h urinary protein, selectivity of urinary protein and serum creatinine; while urinary Lp(a) excretion varies inversely with serum creatinine levels.
    Nephrology 06/2008; 4(1‐2):27 - 30. · 1.69 Impact Factor