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您的检索式：作者名="Alajos Par"
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| 1 | Gut barrier failure biomarkers are associated with poor disease outcome in patients with primary sclerosing cholangitis显示文摘AIM To assess the prevalence of a panel of serologic markers that reflect gut barrier dysfunction in a mixed cohort of pediatric and adult primary sclerosing cholangitis(PSC) patients.METHODS Sera of 67 PSC patients [median age(range): 32(5-79) years, concomitant IBD: 67% and cirrhosis: 20%] were assayed for the presence of antibodies against to F-actin(AAA Ig A/Ig G) and gliadin(AGA Ig A/Ig G)] and for serum level of intestinal fatty acid-binding protein(I-FABP) by ELISA. Markers of lipopolysaccharide(LPS) exposure [LPS binding protein(LBP)] and various antimicrobial antibodies [anti-OMP Plus Ig A and endotoxin core Ig A antibody(Endo CAb)] were also determined. Poor disease outcome was defined as orthotopic liver transplantation and/or liver-related death during the follow-up [median: 99(14-106) mo]. One hundred and fifty-three healthy subjects(HCONT) and 172 ulcerative colitis(UC) patients were the controls. RESULTS A total of 28.4%, 28.0%, 9% and 20.9% of PSC patients were positive for AAA Ig A, AAA Ig G, AGA Ig A and AGA Ig G, respectively. Frequencies of AAA Ig A and AAA Ig G(P < 0.001, for both) and AGA Ig G(P = 0.01, for both) but not AGA Ig A were significantly higher compared to both of the HCONT and the UC groups. In survival analysis, AAA Ig A-positivity was revealed as an independent predictor of poor disease outcome after adjusting either for the presence of cirrhosis [HR = 5.15(1.27-20.86), P = 0.022 or for the Mayo risk score(HR = 4.24(0.99-18.21), P = 0.052]. AAA Ig A-positivity was significantly associated with higher frequency of antimicrobial antibodies(P < 0.001 for Endo Cab Ig A and P = 0.012 for anti-OMP Plus Ig A) and higher level of the enterocyte damage marker(median I-FABP_(AAA Ig A pos vs neg): 365 vs 166 pg/m L, P = 0.011), but not with serum LBP level. CONCLUSION Presence of Ig A type AAA identified PSC patients with progressive disease. Moreover, it is associated with enhanced mucosal immune response to various microbial antigens and enterocyte damage further highlighting the importance of the gut-liver interaction in PSC. | Tamas Tornai Eszter Palyu Zsuzsanna Vitalis Istvan Tornai David Tornai Peter Antal-Szalmas Gary L Norman Zakera Shums Gabor Veres Antal Dezsofi Gabriella Par Alajos Par Peter Orosz Ferenc Szalay Peter Laszlo Lakatos Maria Papp | 2017 | World Journal of Gastroenterology2017，23，29： | 5 |
| 2 | Immunological changes in different patient populations with chronic hepatitis C virus infection显示文摘AIM: To investigate killer inhibitory and activating receptor expression by natural killer(NK), natural killer T-like(NKT-like) and CD8+ T lymphocytes in patients with chronic hepatitis C virus(HCV) infection with elevated and with persistently normal alanine aminotransferase(PNALT).METHODS: The percentage of peripheral blood Treg cells, KIR2DL3, ILT-2, KIR3DL1, CD160, NKG2 D, NKG2 C expressing NK, T and NKT-like cells, cytokine production and NK cytotoxicity were determined by flow cytometry. Twenty-one patients with chronic HCV infection with elevated alanine aminotransferase, 11 HCV carriers with persistently normal alanine aminotransferase and 15 healthy volunteers were enrolled. RESULTS: No significant differences were observed in the percentage of total T, NK or NKT-like cells between study groups. Comparing the activating and inhibitoryreceptor expression by NK cells obtained from HCV carriers with PNALT and chronic HCV hepatitis patients with elevated alanine aminotransferase, NKG2 D activating receptor expression was the only receptor showing a significant difference. NKG2 D expression of NK cells was significantly lower in patients with elevated alanine aminotransferase. The expression of CD160, NKG2 D and NKG2 C activating receptor by CD8+ T cells were significantly lower in patients with chronic HCV hepatitis than in healthy controls and in HCV carriers with PNALT. Plasma TGF-β1 levels inversely correlated with NKG2 D expression by NK cells. In vitro TGF-β1 treatment inhibited NK cells cytotoxic activity and downregulated NKG2 D expression. CD8+ T cells from HCV carriers with PNALT showed significantly elevated expression of CD160, NKG2 D and NKG2 C activating receptors compared to chronic HCV patients with elevated alanine aminotransferase. Enhanced expression of inhibitory KIR2DL3 receptor, and decreased ILT-2 expression on NK cells were also found in chronic hepatitis C patients compared to healthy controls.CONCLUSION: Our study demonstrated a complex dysregulation of activating and inhibitory receptor expression, such as decreased NKG2 D and CD160 activating receptor expression and increased KIR2DL3 inhibitory receptor expression by NK and cytotoxic T cells and may provide further mechanism contributing to defective cellular immune functions in chronic hepatitis C. Increased NKG2 D receptor expression in HCV patients with persistently normal ALT suggests an important pathway for sustaining NK and CD8 T cell function and a protective role against disease progression. | Laszlo Szereday Matyas Meggyes Melinda Halasz Julia Szekeres-Bartho Alajos Par Gabriella Par | 2016 | World Journal of Gastroenterology2016，22，20： | 5 |
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