Publications by authors named "Arezoo Estakhri"

8 Publications

  • Page 1 of 1

The potential role of APOBEC3G in limiting replication of hepatitis B virus.

Arab J Gastroenterol 2012 Dec 8;13(4):170-3. Epub 2013 Jan 8.

Digestive Disease Research Centre, Tehran University of Medical Sciences, Tehran, Iran.

Background And Study Aims: Recent findings introduced APOBEC3G (A3G) as a host factor that blocks viral replication. It induces G to A hypermutations in viral DNA at the step of reverse transcription and in response to interferon. This study aimed to investigate the expression of liver A3G protein in association with both replication of hepatitis B virus (HBV) and frequency of G to A mutations in BCP (basal core promoter)-PC (pre-core) region.

Patients And Methods: Fifty-one liver biopsies of naïve chronic hepatitis B (CHB) patients enrolled for the expression of A3G were done by immunohistochemistry (IHC) standard method. The presence of HBV DNA and sequences of BCP-PC region at the time of liver biopsy was investigated in all patients.

Results: Among 34 patients with detectable HBV DNA, 31 carried 1-5 G to A mutations in the BCP-PC region. IHC results showed that the expression level of A3G in CHB patients' liver was very low. Of all patients, A3G is expressed in three undetectable HBV DNA subjects and a patient with 2.24×10(4) copies ml(-1) of HBV DNA. G to A mutated residues were indicated at positions 1727, 1757 and 1896 of the HBV genome of this patient.

Conclusion: This study indicates that despite very low levels of both A3G in liver and the number of positive subjects, A3G has a potential role to restrict the in vivo replication of HBV.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ajg.2012.08.001DOI Listing
December 2012

19-year survival in a patient with rectosigmoid liver metastasis.

Arch Iran Med 2012 Nov;15(11):726-8

Digestive Disease Research Institute (DDRI), Shariati Hospital, Tehran, Iran.

We present the case of an 82-year-old man diagnosed with rectosigmoid cancer and liver metastasis who survived for 19 years following treatment. At the age of 64, the patient twice experienced mucus excretion for which he underwent a colonoscopy that resulted in a diagnosis of rectosigmoid cancer the patient underwent surgery for resection of the tumor and liver metastasis.  Histopathology was notable for a diagnosis of rectal adenocarcinoma that infiltrated the entire thickness of the wall, with metastasis to the liver and no lymph node involvement.  Post-operative chemotherapy was administered for about four months. The patient remained asymptomatic for 19 years which at that time he presented with liver metastasis, ascites and renal failure.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/0121511/AIM.0015DOI Listing
November 2012

Validity, reliability and factor structure of Hepatitis B Quality of Life Questionnaire version 1.0: findings in a large sample of 320 patients.

Arch Iran Med 2012 May;15(5):290-7

Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.

Background: Quality of life is of significant importance in chronic hepatitis B (CHBV). We aimed to assess the psychometric properties of the Hepatitis B Quality of Life Questionnaire v1.0 (HBQOL) in a large sample of 320 Iranian patients with CHBV.

Methods: After adapting the Iranian version through forward-backward translation and expert panel discussion, we administered HBQOL together with Short-Form 36 (SF-36), Medical Outcome Study Social Support Questionnaire (MOS-SS), Hospital Anxiety and Depression Scale (HADS), and the Iowa Fatigue Scale (IFS) to 320 non-cirrhotic Iranian patients. We used principal component analysis with Varimax rotation to determine the factor structure. To evaluate the psychometric properties of HBQOL, test-retest and internal consistency reliabilities, divergent and convergent validity with other instruments, and discriminatory power were calculated.

Results: Thirty-one questions loaded on to six factors (Anticipation anxiety, Stigma, Psychological well-being, Vitality, Transmissibility and Vulnerability) which explained 63.6% of total variance. Test-retest reliability was 0.66. Cronbach's α was 0.94 for the overall scale and between 0.7 and 0.9 for subscales, with the exception of the Vulnerability subscale. HBQOL and its subscales showed acceptable convergent and divergent validity with other instruments. Furthermore, Vulnerability subscale of HBQOL discriminated between patients with chronic active and chronic inactive hepatitis.

Conclusion: The Iranian version of HBQOL is reliable, valid, and sensitive to the clinical conditions of the patients. This instrument has acceptable factor structure to measure several aspects of quality of life in patients with chronic HBV.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/012155/AIM.009DOI Listing
May 2012

Hepatitis B Virus Infection during Pregnancy: Transmission and Prevention.

Middle East J Dig Dis 2011 Sep;3(2):92-102

Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.

Hepatitis B virus (HBV) infection is a global public health problem. In endemic areas, HBV infection occurs mainly during infancy and early childhood, with mother to child transmission (MTCT) accounting for approximately half of the transmission routes of chronic HBV infections. Prevention of MTCT is an essential step in reducing the global burden of chronic HBV. Natal transmission accounts for most of MTCT, and providing immunoprophylaxis to newborns is an excellent way to block natal transmission. Prenatal transmission is responsible for the minority of MTCT not preventable by immunoprophylaxis. Because of the correlation between prenatal transmission and the level of maternal viremia, some authors find it sound to offer lamivudine in women who have a high viral load (more than 8 to 9 log 10 copies/mL). In addition to considerations regarding the transmission of HBV to the child, the combination of HBV infection and pregnancy raises several unique management issues. Chronic HBV infection during pregnancy is usually mild but may flare after delivery or with discontinuing therapy. Management of chronic HBV infection in pregnancy is mostly supportive with antiviral medications indicated in a small subset of HBV infected women with rapidly progressive chronic liver disease.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4154922PMC
September 2011

Liver histology and HBV DNA levels in chronically HBV infected patients with persistently normal alanine aminotransferase.

Arch Iran Med 2010 May;13(3):193-202

Digestive Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran.

Background: Data on histological activity and HBV DNA levels in patients with chronic HBV infection and persistently normal alanine aminotransferase levels are sparse. We aimed to investigate the histological activity and HBV DNA levels in these patients.

Methods: There were 132 patients with HBeAg negative chronic HBV infection and persistently normal alanine aminotransferase levels that were included prospectively. Data were dichotomized according to the median levels. Associations of histology with HBV DNA and other variables were assessed.

Results: A total of 80 patients were male. The median age was 36 years. The median baseline HBV DNA was 2.9Log10 IU/mL. There were 50 cases (38%) with a total score > or = 5, 53 cases (40.2%) had grade > or = 4 and 40 cases (30.3%) had stage > or = 2. A baseline HBV DNA <2000 IU/mL was seen in 24 cases (48%) of those with total score > or = 5, 28 cases (53%) of those with grade > or = 4 and 9 cases (22.5%) with stage > or = 2. Multivariate analysis of baseline HBV DNA above the median level significantly predicted the total score, grade and stage with an adjusted odds ratio of 5.43, 3.47, and 4.23, respectively when compared to below median values. A second liver biopsy was performed in 61 patients. The median time interval between the two biopsies was 40 months. Total scores of 23 cases (38%) progressed by > or = 2 scores and the HBV DNA of 18 cases (22.5%) increased by > or = 1 Log10 IU when compared to baseline values.

Conclusion: HBeAg negative chronic HBV infection with persistently normal alanine aminotransferase is not a silent disease. Active liver disease may be seen in such patients with viral loads less than 2000 IU/mL.
View Article and Find Full Text PDF

Download full-text PDF

Source
May 2010

Surface area: a better predictor of disease severity than the height and volume of the barium column in patients with primary achalasia.

Eur J Gastroenterol Hepatol 2006 Nov;18(11):1203-8

Digestive Disease Research Center, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran.

Objective: Subjective assessment of primary achalasia is not accurate. We aimed to study the utility of surface area of barium retention in the objective assessment of these patients.

Methods: Subjective and objective esophageal functions of 99 patients with primary achalasia were evaluated initially and 43 of them were reevaluated 1 month after balloon dilation.

Results: Before dilation: Ninety-nine patients were enrolled. Forty-one of them were male. The mean age was 37.5+/-15.3 years. The mean score, resting lower esophageal sphincter pressure, height, surface and volume of barium retention at 5 min were 8.03+/-3.1, 59.1+/-20 mmHg, 9.9+/-4.9 cm, and 23.6+/-13.9 cm and 53.2+/-47.7 cm, respectively. Surface area at 5 min had best correlation and predictive value for resting lower esophageal sphincter pressure. After dilation: Forty-three of 99 patients were reevaluated after balloon dilation. The mean age was 36.8+/-13.6 years. Seventeen of them were male. Mean score, resting lower esophageal sphincter pressure, height, surface area and volume of barium retention at 5 min dropped significantly after dilation. Surface area at 5 min had best correlation and predictive value for lower esophageal sphincter pressure.

Conclusions: Surface area of barium retention at 5 min is an accurate objective tool to assess patients with primary achalasia. It is cheap and easy to perform; therefore, it could be used more frequently in postdilation follow-up.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1097/01.meg.0000236882.36590.76DOI Listing
November 2006

Noninvasive markers of liver fibrosis and inflammation in chronic hepatitis B-virus related liver disease.

Am J Gastroenterol 2006 Nov 4;101(11):2537-45. Epub 2006 Oct 4.

Digestive Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran.

Background/aims: Noninvasive markers for predicting significant fibrosis and inflammation have not yet been validated in an unselected group of chronic hepatitis B virus (HBV) carriers. The aim of this study was to create noninvasive models to predict significant fibrosis and inflammation in chronic HBV carriers.

Methods: A total of 276 (229 HBeAg negative, 47 HBeAg positive) unselected consecutive treatment naïve patients chronically infected with HBV who attended our center over a 36-month period underwent liver biopsy. HBeAg negative patients were randomly divided into two cohorts: training group (N = 130) and validation group (N = 99). HBeAg positive patients were analyzed as a whole without separation. Thirteen parameters were analyzed separately in HBeAg negative and HBeAg positive patients to predict significant fibrosis (Ishak stage >or=3) and inflammation (Ishak grade >or=7).

Results: In HBeAg negative patients significant liver fibrosis was best predicted using the variables HBV DNA levels, alkaline phosphatase, albumin, and platelet counts with an area under ROC curve (AUC) of 0.91 for the training group and 0.85 for the validation group. Using the low cutoff probability of 4.72, significant fibrosis could be excluded with negative predictive value of 99% in the entire cohort, and liver biopsy would have been avoided in 52% of patients. The best model for predicting significant inflammation included the variables age, HBV DNA levels, AST, and albumin with an AUC of 0.93 in the training and 0.82 in the validation group. In HBeAg positive patients no factor could predict accurately stages of liver fibrosis, but the best factor for predicting significant inflammation was AST with an AUC of 0.87.

Conclusions: Significant hepatic fibrosis and necroinflammation can reliably be predicted using routinely checked tests and HBV DNA levels.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1111/j.1572-0241.2006.00788.xDOI Listing
November 2006

Serum hyaluronate as a non-invasive marker of hepatic fibrosis and inflammation in HBeAg-negative chronic hepatitis B.

BMC Gastroenterol 2005 Oct 12;5:32. Epub 2005 Oct 12.

Digestive Disease Research Centre, Tehran University of Medical Science, Tehran, Iran.

Background: HBV infection is a serious global heath problem. It is crucial to monitor this disease more closely with a non-invasive marker in clinical trials. We aimed to evaluate the predictive value of serum hyaluronate for the presence of extensive liver fibrosis and inflammation.

Methods: 28 healthy volunteers and 65 patients with HBeAg negative chronic hepatitis B were enrolled. Liver biopsies scored according to Ishak system. Association of serum hyaloronate with liver fibrosis and inflammation were assessed, and cut off points for serum hyaluronate levels were identified by receiver operating characteristics (ROC) curves and their values for prediction of fibrosis and inflammation were assessed.

Results: In patients with CHB serum hyaluronate had the most significant correlation and predictive values for the liver fibrosis and inflammation comparing to the other variables. At the cut off point of 126.4 ngm/ml it could discriminate extensive fibrosis from milder ones with sensitivity of 90.9% and specificity of 98.1%. With the same value it could discriminate extensive inflammation from their milder counterparts with sensitivity of 63.6% and specificity of 92.6%.

Conclusion: Serum hyaluronate was the best predictor of extensive liver fibrosis and inflammation and it could discriminate subgroups of patients with chronic hepatitis B. It could be used as a non-invasive test to monitor these patients more closely with developing anti viral agents in clinical trials.
View Article and Find Full Text PDF

Download full-text PDF

Source
http://dx.doi.org/10.1186/1471-230X-5-32DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1266362PMC
October 2005