The inverse association of serum HBV DNA level with HDL and adiponectin in chronic hepatitis B infection
© Mohamadkhani et al; licensee BioMed Central Ltd. 2010
Received: 15 June 2010
Accepted: 14 September 2010
Published: 14 September 2010
The natural history of hepatitis B virus (HBV) is complex and influenced by the level of viral replication and host factors. The hepatoprotective role of high density lipoproteins (HDL) and adiponectin as host factors on HBV persistence is less well understood.
To investigate correlation between HBV DNA level with clinical parameters in patients with chronic hepatitis B, 92 male subjects with HBV infection without any risk factors for diabetes were enrolled in this study. Age and BMI of the study population were matched and HBV DNA, ALT, tumor necrosis factor alpha (TNF-α), adiponectin and lipid levels was measured.
Serum HBV DNA correlated inversely with serum HDL level (r = -0.23; P = 0.014). The median of log copies/ml for HBV DNA (3.67) was considered as cut off point. Patients with HBV DNA level higher than cut off point had lower adiponectin (8.7 ± 5.3 vs 10.7 ± 4.9 μg/ml p = 0.05). Also, adiponectin had a negative correlation with TNF-α (r = -0.21, P = 0.04) and positive correlations with HDL (r = 0.18, P = 0.043).Multivariate regression models show that serum HDL level is an independed factor to predict serum HBV DNA.
Our findings showed that higher HBV DNA levels are associated with lower HDL and adiponectin but induced TNF-alpha values.
The broad outcomes of hepatitis B virus (HBV) infection can be divided into acute infection and chronic hepatitis . The ongoing replication of HBV in chronic hepatitis induce oxidative stress and associated with liver inflammation, which over the course of years increases risk of fibrosis, cirrhosis, and liver cancer [2, 3]. Factors which determine viral replication and outcome of infection are not fully understood, although host factors are known to play a major role in this regard . Among these factors, HDL, with several biological properties, including anti oxidative and anti inflammatory activities has a potential role to be a part of nonspecific immunity [5, 6]. Adiponectin also attenuates inflammation, oxidative stress, and pro-inflammatory cytokine production .
The anti-inflammatory function of HDL involves induction transforming growth factor β which might function as an important mediator of the anti-inflammatory activity . In chronic hepatitis B patients, serum HDL concentration inversely correlates with excess release of pro-inflammatory response and progressive liver disease [9, 10]. Adiponectin, an adipose tissue-specific protein puts multiple beneficial effects on tissue and vascular physiology. At physiological concentrations, adiponectin suppresses TNF-α induced NF-β activation and blocks TNF-α release in endothelial cells . It also ameliorates liver fibrosis via suppression of activated hepatic stellate cells function, and might slow down progression of hepatocarcinogenesis via suppression of oxidative stress . In addition, adiponectin activates peroxisome proliferator-activated receptor-a (PPAR-a) to up-regulates the hepatic expression of apoproteins A-I and A-II, which in turn promotes increased hepatic HDL secretion [12, 13]. Animal models revealed the hepatoprotective action of adiponectin . It was shown that adiponectin exert its hepatoprotective function by increasing activation of mitochondrial fatty acids β-oxidation and thus reductions of circulation free fatty acid [13, 15].
HDL and adiponectin share common metabolic pathways, however, their role in liver diseases associated with chronic hepatitis B infection is not well understood. To further investigate association of HDL and adiponectin with HBV replication rate and therefore introducing a possible strategy for treating patients with chronic hepatitis B, we examined serum HBV DNA level with regard to serum HDL concentration as well as adiponectin and proposing their beneficial function in treating chronic hepatitis B.
Materials and methods
Sera from 92 male adult carriers, positive for HBsAg and HBV DNA and negative for HBeAg as well as HCV, HDV, and HIV antibodies referring to a tertiary university-based referral center between September 2006 and November 2008 for regularly follow up were collected. None of the patients had evidence of cirrhosis and/or hepatocellular carcinoma. There was no clinical or para-clinical evidence of diabetes mellitus based on criteria defined by World Health Organization . Both normal and elevated ALTs were included in the study. Patients had no history of treatment for HBV prior to the study and they also had no alcohol consumption. Study protocol was approved by the Ethics Committee of Tehran University of Medical Sciences (TUMS). Informed consent was obtained from all participant.
Clinical and Laboratory Assessments
Following to an overnight fasting (12h) serum ALT, total cholesterol, triglycerides, high-density lipoprotein (HDL), fasting blood sugar (FBS), Albumin and Bilirubin were measured with commercial kits using a Hitachi 7250 special autoanalyzer (Hitachi, Tokyo, Japan). The body mass index (BMI) was calculated by the formula: weight (kg)/height (m2).
Determination of Serum Adiponectin Level and TNF-α
Both serum adiponectin and TNF-α were measured using enzyme immunoassay Orgenium (Vantaa, Finland) for adiponectin and Bender Medsystems (Vienna, Austria) for TNF-α.
HBs- and HBe- Antigens were tested using commercially available enzyme-linked immunosorbent assay kits from RADIM (Italy). HBV DNA was extracted from 200 μl of serum using QIAamp DNA Blood Mini Kit (QIAGEN USA) according to the manufacturer's instructions. HBV DNA was then quantified in the Light-Cycler (Roche) using the RealART™ HBV LC PCR (QIAGEN, Hilden, Germany) according to the manufacturer's instructions. The linear range of this assay was 102-109 copies/ml.
Results were expressed as mean ± standard deviation. Relations between continuous variables were tested using Spearman's rank correlation coefficients, Pearson correlation coefficients and multivariate linear regression models. Adjustment on age, ALT and BMI was performed using multivariate regression models. Kolmogrov-Smirno test was used to test the normality in continues variables (Ramlu-Hansen 1983). When normal distribution assumption was not met for some variables, the square root transformation was used to change continues variables to normal distribution. Log copies/ml HBV DNA was considered as a continues variable in multivariate regression models and when it was considered as a dichotomous variable (less than median and more than median) logistic regression models was used to check association between HBV DNA and other variables. Mean differences were tested by Student's t-test. To find nonlinear association between HBV DNA and HDL with adiponectin in scatter plots, Epanechnikov kernel smooting was used. Analyses were done using STATA ver. 10. P-value less than .05 was considered significant.
Characteristics and Clinical Parameters of study population
Clinical and biochemical characteristics of patients
Characteristics of patients (n = 92)
Mean ± SD
39 ± 10
25.5 ± 1.2
85 ± 13
4.3 ± 0.5
Bilirubin total (mg%)
0.6 ± 0.3
48 ± 51
168 ± 33
138 ± 42
49 ± 11
9.7 ± 5.2
10.6 ± 3.6
HBV DNA (log copies/ml)
3.7 ± 0.9
Biochemical Evaluation in Patients with Chronic Hepatitis B
Serum HBV DNA (log copies/ml) associated with ALT level (r = 0.3, P = 0.001). A negative correlation was noted between HBV DNA and serum HDL (r = -0.24, P = 0.014). The same correlation was found between adiponectin with TNF-alpha and triglyceride (r = -0.21, P = 0.04, r = -0.21, P = 0.037). In contrast, serum adiponectin showed a positive correlation with serum HDL levels (r = 0.21, P = 0.05). There was no statistically significant association between serum HDL and adiponectin with FBS, Albumin, Bilirubin, BMI, age, ALT and cholesterol.
Association of Serum HDL and Adiponectin with HBV DNA
Association of clinical findings of chronic hepatitis B with HBV DNA level higher than median log copies/ml or lower than median (3.67 log copies/ml).
HBV DNA < median *
HBV DNA > median *
41 ± 10
38 ± 11
25.4 ± 1.1
25.6 ± 1.2
83 ± 14
86 ± 8
4.3 ± 0.5
4.2 ± 0.5
Bilirubin total (mg%)
0.5 ± 0.2
0.6 ± 0.2
36 ± 26
61 ± 65
172 ± 31
164 ± 34
136 ± 44
140 ± 39
52 ± 12
47 ± 10
10.7 ± 4.9
8.7 ± 5.3
9.7 ± 2.7
11.5 ± 4.2
Log HBV DNA= 4.4 -0.029 adiponectin -0.014 HDL+0.006 ALT
This regression equation shows that with considering adjustment on ALT variable, increasing HDL and adiponectin variables decrease Log HBV DNA.
TNF-α was significantly elevated in patients with HBV DNA levels more than median compared with those in HBV DNA levels less than median (11.5 ± 4.2 vs 9.7 ± 2.7 p = 0.017).
We found that 31% of patients with HBV DNA higher than median had serum HDL less than 40 mg/dl, while 15% of patients with HBV DNA lower than median had serum HDL less than 40 mg/dl. Although the Chi-squared P value was 0.06, but it was identified that the number of patients with HDL less than 40 mg/dl and HBV DNA higher than median is approximately 2 times more compared to patients who have HDL less than 40 mg/dl and HBV DNA lower than median.
In a multivariate regression model with depended variable Log HBV DNA and independed variables serum HDL, age, and BMI ,correlation between Log HBV and serum HDL was statistically significant (P = 0.036. b = -0.018). Coefficient of regression analysis showed an increased unit of serum HDL accompanied with 1.8 percent reduction in log HBV DNA. When adjustment was done on ALT in the multivariate regression model, the association between Log HBV DNA and serum HDL was significant ( P = 0.046, b = -0.016).
Development of cirrhosis and HCC has been attributed to the higher replication index of HBV [17–19]. Thus serum HBV DNA could play important role for monitoring outcome of chronic hepatitis B infection which in part seems to be affected by host factors. The key finding of our investigation was significant negative correlation between HDL and HBV DNA. Moreover we showed that there was a negative association between HBV DNA and adiponectin in a concentration less than 16 μg/ml. These associations indicating that HDL can itself reduce viral infection by potent anti-infectious activity . HDL was shown to be part of nonspecific innate immunity. Changes including altered HDL content and HDL apolipoprotein composition might redirect cholesterol from the liver to immune cells during infection [5, 20].
Regarding to viral infectious diseases; influenza infection accompanies with decreased levels of HDL . It has also been reported that HIV-1 RNA viral load correlates with low HDL-Cholesterol levels . In addition high levels of HDL-cholesterol associate with a better viral response in treated HIV patients . A study carried out in Asian chronic hepatitis C patients, demonstrated that HDL had a significant effect on early viral load decline . Finally most other studies have observed decreased levels of high-density lipoprotein-cholesterol in chronic hepatitis B virus infection [10, 25]. HDL restores the hepatice endothelial nitric oxide synthase (eNOS) activity which is down regulated in cirrhotic patients. Hence, Thabut et al, showed limited anti-infectious activity in cirrhotic rats with decreased circulating HDL . Herein, we demonstrate the protective effects of HDL to keep lower HBV DNA. It is probable that HDL is a component of the innate immune system that can limit infections . The interaction of high-density lipoproteins with human neutrophils has been studied in vitro, here we propose in vivo, in addition to macrophages, HBV might be transferred to HDL and endocytosed within neutrophils.
As noted earlier, Adiponectin likely promotes HDL formation on multiple fronts . We have now shown that adiponectin, independent from common metabolic risk factors contributes inversely with regards to HBV DNA. The positive relationship of adiponectin with the metabolic profile in adults has been less studied in chronic hepatitis B patients. Hui and co-worker reported that serum adiponectin may have a role in fibrosis progression in CHB infection . In contrast another study has suggested that increased serum adiponectin in hepatic inflammatory activity which is an antagonizing TNF-α, may be a secondary to the response to hepatic injury in chronic hepatitis B . Cytokines including TNF-α, are mediators of inflammation and appears to have a direct effect to inhibit apolipoproteins production by hepatocytes .
In summary, while the association between log HBV-DNA and serum HDL was not linear, patients with serum HDL more than 40 mg/dl showed a negative correlation with HBV DNA. In this study we adjusted the population under study for age, sex, BMI, and risk factors for diabetes which inversely correlate with serum HDL and adiponectin level  in order to obtain more reliable results when assessing the association of variables with the amount of HBV DNA. Thus our investigation suggests that serum HDL concentration could play inhibitory function for hepatitis B viral replication. In addition, adiponectin may also participate in the reduction of viral replication in CHB patients through activation of HDL production. However it should be noted that data regarding to association between serum adiponectin with the circulating HBV DNA level is still rather conflicting. Therefore, this association should be studied in prospective, carefully designed group controlled studies including large cohorts of patients with meticulous consideration of metabolic and other potential confounding factors.
This Study was supported by grants from the Digestive Disease Research Center, Medical Science, University of Tehran.
- Maddrey WC: Hepatitis B: an important public health issue. J Med Virol 2000, 61: 362-366. 10.1002/1096-9071(200007)61:3<362::AID-JMV14>3.0.CO;2-IPubMedView ArticleGoogle Scholar
- Tsai SM, Lin SK, Lee KT, Hsiao JK, Huang JC, Wu SH, Ma H, Tsai LY: Evaluation of redox statuses in patients with hepatitis B virus-associated hepatocellular carcinoma. Ann Clin Biochem 2009, 46: 394-400. 10.1258/acb.2009.009029PubMedView ArticleGoogle Scholar
- Mohamadkhani A, Jazii FR, Poustchi H, Nouraein O, Abbasi S, Sotoudeh M, Montazeri G: The role of mutations in core protein of hepatitis B virus in liver fibrosis. Virol J 2009, 6: 209. 10.1186/1743-422X-6-209PubMedPubMed CentralView ArticleGoogle Scholar
- Thursz M: Genetic susceptibility in chronic viral hepatitis. Antiviral Res 2001, 52: 113-116. 10.1016/S0166-3542(01)00175-9PubMedView ArticleGoogle Scholar
- Kontush A, Chapman MJ: Functionally defective high-density lipoprotein: a new therapeutic target at the crossroads of dyslipidemia, inflammation, and atherosclerosis. Pharmacol Rev 2006, 58: 342-374. 10.1124/pr.58.3.1PubMedView ArticleGoogle Scholar
- Mackness B, Mackness M: High-density lipoprotein: why all the fuss? Ann Clin Biochem 2009, 46: 5-7. 10.1258/acb.2008.008133PubMedView ArticleGoogle Scholar
- Masaki T, Chiba S, Tatsukawa H, Yasuda T, Noguchi H, Seike M, Yoshimatsu H: Adiponectin protects LPS-induced liver injury through modulation of TNF-alpha in KK-Ay obese mice. Hepatology 2004, 40: 177-184. 10.1002/hep.20282PubMedView ArticleGoogle Scholar
- Norata GD, Callegari E, Marchesi M, Chiesa G, Eriksson P, Catapano AL: High-density lipoproteins induce transforming growth factor-beta2 expression in endothelial cells. Circulation 2005, 111: 2805-2811. 10.1161/CIRCULATIONAHA.104.472886PubMedView ArticleGoogle Scholar
- Siagris D, Vafiadis G, Michalaki M, Lekkou A, Starakis I, Makri M, Margaritis V, Christofidou M, Tsamandas AC, Labropoulou-Karatza C: Serum adiponectin in chronic hepatitis C and B. J Viral Hepat 2007, 14: 577-583. 10.1111/j.1365-2893.2007.00850.xPubMedView ArticleGoogle Scholar
- Su TC, Lee YT, Cheng TJ, Chien HP, Wang JD: Chronic hepatitis B virus infection and dyslipidemia. J Formos Med Assoc 2004, 103: 286-291.PubMedGoogle Scholar
- Tsochatzis E, Papatheodoridis GV, Archimandritis AJ: The evolving role of leptin and adiponectin in chronic liver diseases. Am J Gastroenterol 2006, 101: 2629-2640.PubMedView ArticleGoogle Scholar
- Hui Y, Yu-Yuan L, Yu-Qiang N, Wei-Hong S, Yan-Lei D, Xiao-Bo L, Yong-Jian Z: Effect of peroxisome proliferator-activated receptors-gamma and co-activator-1alpha genetic polymorphisms on plasma adiponectin levels and susceptibility of non-alcoholic fatty liver disease in Chinese people. Liver Int 2008, 28: 385-392. 10.1111/j.1478-3231.2007.01623.xPubMedView ArticleGoogle Scholar
- Yamauchi T, Kamon J, Ito Y, Tsuchida A, Yokomizo T, Kita S, Sugiyama T, Miyagishi M, Hara K, Tsunoda M, et al.: Cloning of adiponectin receptors that mediate antidiabetic metabolic effects. Nature 2003, 423: 762-769. 10.1038/nature01705PubMedView ArticleGoogle Scholar
- Xu A, Wang Y, Keshaw H, Xu LY, Lam KS, Cooper GJ: The fat-derived hormone adiponectin alleviates alcoholic and nonalcoholic fatty liver diseases in mice. J Clin Invest 2003, 112: 91-100.PubMedPubMed CentralView ArticleGoogle Scholar
- You M, Considine RV, Leone TC, Kelly DP, Crabb DW: Role of adiponectin in the protective action of dietary saturated fat against alcoholic fatty liver in mice. Hepatology 2005, 42: 568-577. 10.1002/hep.20821PubMedPubMed CentralView ArticleGoogle Scholar
- Alberti KGMM, Aschner ACD, Bennett PH, Phoenix NIDDK, et al.: Definition, Diagnosis and Classification of Diabetes Mellitus and its Complications. World Health Organization Press; Department of Noncommunicable Disease Surveillance. Geneva. 1999Google Scholar
- Chen CJ, Yang HI, Iloeje UH: Hepatitis B virus DNA levels and outcomes in chronic hepatitis B. Hepatology 2009, 49: S72-84. 10.1002/hep.22884PubMedView ArticleGoogle Scholar
- Chen CJ, Yang HI, Su J, Jen CL, You SL, Lu SN, Huang GT, Iloeje UH: Risk of hepatocellular carcinoma across a biological gradient of serum hepatitis B virus DNA level. JAMA 2006, 295: 65-73. 10.1001/jama.295.1.65PubMedView ArticleGoogle Scholar
- Iloeje UH, Yang HI, Su J, Jen CL, You SL, Chen CJ: Predicting cirrhosis risk based on the level of circulating hepatitis B viral load. Gastroenterology 2006, 130: 678-686. 10.1053/j.gastro.2005.11.016PubMedView ArticleGoogle Scholar
- Burger D, Dayer JM: High-density lipoprotein-associated apolipoprotein A-I: the missing link between infection and chronic inflammation? Autoimmun Rev 2002, 1: 111-117. 10.1016/S1568-9972(01)00018-0PubMedView ArticleGoogle Scholar
- Navab M, Berliner JA, Subbanagounder G, Hama S, Lusis AJ, Castellani LW, Reddy S, Shih D, Shi W, Watson AD, et al.: HDL and the inflammatory response induced by LDL-derived oxidized phospholipids. Arterioscler Thromb Vasc Biol 2001, 21: 481-488.PubMedView ArticleGoogle Scholar
- Bernal E, Masia M, Padilla S, Gutierrez F: High-density lipoprotein cholesterol in HIV-infected patients: evidence for an association with HIV-1 viral load, antiretroviral therapy status, and regimen composition. AIDS Patient Care STDS 2008, 22: 569-575. 10.1089/apc.2007.0186PubMedView ArticleGoogle Scholar
- Alonso-Villaverde C, Segues T, Coll-Crespo B, Perez-Bernalte R, Rabassa A, Gomila M, Parra S, Gozalez-Esteban MA, Jimenez-Exposito MJ, Masana L: High-density lipoprotein concentrations relate to the clinical course of HIV viral load in patients undergoing antiretroviral therapy. AIDS 2003, 17: 1173-1178. 10.1097/00002030-200305230-00009PubMedView ArticleGoogle Scholar
- Hsu CS, Liu CH, Liu CJ, Chen CL, Lai MY, Chen PJ, Chen DS, Kao JH: Factors affecting early viral load decline of Asian chronic hepatitis C patients receiving pegylated interferon plus ribavirin therapy. Antivir Ther 2009, 14: 45-54.PubMedGoogle Scholar
- Fabris C, Federico E, Soardo G, Falleti E, Pirisi M: Blood lipids of patients with chronic hepatitis: differences related to viral etiology. Clin Chim Acta 1997, 261: 159-165. 10.1016/S0009-8981(97)06532-7PubMedView ArticleGoogle Scholar
- Thabut D, Tazi KA, Bonnefont-Rousselot D, Aller M, Farges O, Guimont MC, Tellier Z, Guichard C, Ogier-Denis E, Poynard T, et al.: High-density lipoprotein administration attenuates liver proinflammatory response, restores liver endothelial nitric oxide synthase activity, and lowers portal pressure in cirrhotic rats. Hepatology 2007, 46: 1893-1906. 10.1002/hep.21875PubMedView ArticleGoogle Scholar
- Perez-Morga D: [Trypanolytic factor of human serum]. Bull Mem Acad R Med Belg 2006, 161: 309-315.PubMedGoogle Scholar
- Shephard EG, de Beer FC, de Beer MC, Jeenah MS, Coetzee GA, van der Westhuyzen DR: Neutrophil association and degradation of normal and acute-phase high-density lipoprotein 3. Biochem J 1987, 248: 919-926.PubMedPubMed CentralView ArticleGoogle Scholar
- Hui CK, Zhang HY, Lee NP, Chan W, Yueng YH, Leung KW, Lu L, Leung N, Lo CM, Fan ST, et al.: Serum adiponectin is increased in advancing liver fibrosis and declines with reduction in fibrosis in chronic hepatitis B. J Hepatol 2007, 47: 191-202. 10.1016/j.jhep.2007.02.023PubMedView ArticleGoogle Scholar
- Ettinger WH, Varma VK, Sorci-Thomas M, Parks JS, Sigmon RC, Smith TK, Verdery RB: Cytokines decrease apolipoprotein accumulation in medium from Hep G2 cells. Arterioscler Thromb 1994, 14: 8-13.PubMedView ArticleGoogle Scholar
- Willett K, Jiang R, Lenart E, Spiegelman D, Willett W: Comparison of bioelectrical impedance and BMI in predicting obesity-related medical conditions. Obesity (Silver Spring) 2006, 14: 480-490. 10.1038/oby.2006.63View ArticleGoogle Scholar
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