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Autoimmune hepatitis

Hepatitis is a gastroenterological disease, featuring inflammation of the liver. The clinical signs and prognosis, as well as the therapy, depend on the cause. more...

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Signs and symptoms

Hepatitis is characterised by fatigue, malaise, joint aches, abdominal pain, vomiting 2-3 times per day for the first 5 days, loss of appetite, dark urine, fever, hepatomegaly (enlarged liver) and jaundice (icterus). Some chronic forms of hepatitis show very few of these signs and only present when the longstanding inflammation has led to the replacement of liver cells by connective tissue; the result is cirrhosis. Certain liver function tests can also indicate hepatitis.

Types of hepatitis

Viral

Most cases of acute hepatitis are due to viral infections:

  • Hepatitis A
  • Hepatitis B
  • Hepatitis C
  • D-agent (requires presence of the hepatitis B virus)
  • Hepatitis E
  • Hepatitis F (discredited)
  • Hepatitis G
Please see the respective articles for more detailed information.
See also infectious canine hepatitis.

Hepatitis A

Hepatitis A is an enterovirus transmitted by the orofecal route, such as contaminated food. It causes an acute form of hepatitis and does not have a chronic stage. The patient's immune system makes antibodies against hepatitis A that confer immunity against future infection. People with hepatitis A are usually advised to rest, stay hydrated and avoid alcohol. A vaccine is available that will prevent infection from hepatitis A for life. It can be spread through personal contact,consumption of raw sea food or drinking contaminated water.

Hepatitis B

Hepatitis B causes both acute and chronic hepatitis in some patients who are unable to eliminate the virus. Identified methods of transmission include blood (blood transfusion, now rare), tattoos (both amateur and professionally done), horizontally (sexually or through contact with blood or bodily fluids), or vertically (from mother to her unborn child). However, in about half of cases the source of infection cannot be determined. Blood contact can occur by sharing syringes in intravenous drug use, shaving accessories such as razor blades, or touching wounds on infected persons. Needle-exchange programmes have been created in many countries as a form of prevention. In the United States, 95% of patients clear their infection and develop antibodies against hepatitis B virus. 5% of patients do not clear the infection and develop chronic infection; only these people are at risk of long term complications of hepatitis B.

Patients with chronic hepatitis B have antibodies against hepatitis B, but these antibodies are not enough to clear the infection that establishes itself in the DNA of the affected liver cells. The continued production of virus combined with antibodies is a likely cause of immune complex disease seen in these patients. A vaccine is available that will prevent infection from hepatitis B for life. Hepatitis B infections result in 500,000 to 1,200,000 deaths per year worldwide due to the complications of chronic hepatitis, cirrhosis, and hepatocellular carcinoma. Hepatitis B is endemic in a number of (mainly South-East Asian) countries, making cirrhosis and hepatocellular carcinoma big killers. There are three, FDA-approved treatment options available for persons with a chronic hepatitis B infection: alpha-interferon, adefovir and lamivudine. In about 45% of persons on treatment achieve a sustained response.

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A study of autoimmune markers in hepatitis C infection
From Indian Journal of Medical Research, 5/1/01 by Agarwal, N

Background & objectives: Hepatitis C virus (HCV) infection is associated with several autoimmune markers. Despite HCV being common in India, no information on this aspect is available. This study was undertaken to ascertain the frequency and clinical significance of autoimmune markers like rheumatoid factor (RF), antinuclear antibodies (ANA), antibodies to double stranded deoxyribonucleic acid (dsDNA), anti neutrophil cytoplasmic antibody (ANCA), anti smooth muscle antibodies (ASMA), anti liver kidney microsomal I antibodies (anti LKM1), anti gastric parietal cell antibodies (anti GPCA), anti mitochondrial antibodies (AMA), anti cardiolipin antibodies (ACL) and cryoglobulins in HCV infection and to determine the effect of treatment on these markers.

Methods: Twenty five patients with chronic hepatitis C and 25 healthy controls were studied. Cryoglobulins were detected by cryoprecipitation, RF by latex agglutination, anti dsDNA and ACL by ELISA while indirect immunofluorescence was used to detect all other autoantibodies.

Results: Eighteen patients (72%) demonstrated autoimmune markers. RF, cryoglobulins and anti LKMI antibodies were the most frequently detected markers (in 32% patients each). ASMA, perinuclear ANCA (pANCA), ANA and anti GPCA were seen in 24, 20, 12 and 4 per cent patients respectively. None of the patients exhibited ACL, AMA or antibodies to dsDNA. No antibodies were detected in healthy controls. Sixty per cent of the patients had rheumatological symptoms. Of the seven patients followed up after treatment with alpha interferon, only two exhibited persistence of RF, while symptoms and other markers disappeared.

Interpretation cf conclusion: Rheumatological symptoms and autoimmune markers are common in HCV infection and are usually overlooked. Patients with unexplained joint pains and/or palpable purpura should be screened for HCV. Further studies are needed to delineate fully the link between infection and autoimmunity.

Key words Autoimmune markers - hepatitis C - rheumatological symptoms

Hepatitis C virus (HCV) infection affects nearly 1 per cent of the world population1. It is also reported to be common in India, accounting for 4.8-9 per cent cases of acute viral hepatitis and 13.8-25.6 per cent patients with chronic liver disease2,3. The frequency in healthy blood donors in India ranges from 1.8-15.9 per cent3,4. Extra hepatic clinical manifestations are often seen in HCV patients and involve primarily the joints, muscles and skin. Apart from these rheumatologic manifestations, several autoimmune markers like antinuclear antibodies (ANA), anti smooth muscle antibodies (ASMA), rheumatoid factor (RF), cryoglobulins etc., have been demonstrated in HCV infection5-8. Despite numerous reports of HCV infection from India there have been no studies on the rheumatologic manifestations or autoimmune markers in HCV infection from the country. Taking in view the significant prevalence of HCV in India coupled with lack of information about autoantibodies/rheumatological features in Indian patients with HCV, a prospective study was planned to ascertain the frequency and clinical significance of autoimmune markers in HCV infection and to determine the effect of treatment on these markers.

Material & Methods

Study design and patient population: This prospective study was carried out at the All India Institute of Medical Sciences (AIIMS), New Delhi from June 1997 to June 1999. The study group included 25 adult patients with chronic HCV infection selected by systematic random sampling from patients with HCV attending the liver clinic. The study was approved by the departmental committee and patients were recruited into the study after obtaining informed consent. HCV antibodies were detected by third generation ELISA technique. An in-house, validated, third generation, ELISA kit developed at the AIIMS, New Delhi was used. Patients with concomitant hepatitis B virus (HBV) infection or other forms of associated liver disease like alcoholic liver disease were excluded from the study.

Control group: The control group included 25 age and sex matched healthy individuals drawn from blood bank donors.

Clinical examination: All patients and control individuals were subjected to a detailed history and systemic examination, which included a comprehensive examination of the musculoskeletal system. Clinical features that were specifically looked for included arthralgias, arthritis, purpura, livedo reticularis, Raynaud's phenomenon and muscle weakness.

Autoimmune markers: The autoimmune markers studied included cryoglobulins, RF, ANA, ASMA, anti liver kidney microsomal 1 (LKM 1) antibodies, anti gastric parietal cell antibodies (anti GPCA), anti mitochondrial antibodies (AMA), antibodies to double stranded deoxyribonucleic acid (ds DNA), anti cardiolipin antibodies (ACL) and anti neutrophil cytoplasmic antibodies (ANCA).

Serum cryoglobulins were detected by cryoprecipitation. Briefly 20 ml of venous blood was taken from subjects in a prewarmed (37 deg C) syringe, allowed to clot at 370C and the serum separated by means of centrifugation, The supernatant was incubated at 4 deg C for 8 days and examined daily for cryoprecipitate.

RF was detected by latex agglutination10 test (Avitex-RF kit, Omega Diagnostics Limited, UK). Detection of ANA, ASMA, anti LKM1 antibodies, anti GPCA and AMA was done by indirect immunofluorescence (IIF) assay using air dried cryostat sections from rat liver, kidney and stomach as substrates11-13. ANA was interpreted to be positive when antibodies were found to be reacting with the nuclear antigen in the hepatocytes. ASMA was detected when antibodies were found to be reacting with gastric smooth muscle cells. Anti LKM I antibody reactivity was interpreted by positive immunofluorescence of the proximal kidney tubules and negative staining of the distal kidney tubules, with fine granular and uniform staining of liver sections. AMA was detected when antibodies reacted with distal kidney tubules as well as gastric parietal cells with the liver sections staining coarse granular. Presence of anti GPCA was interpreted by reactivity of antibodies with only gastric parietal cells. IF was also used to detect ANCA using neutrophils as a substrate14.

ELISA15,16 was used to detect anti dsDNA antibodies and IgG ACL (Varelisa dsDNA and Cardiolipin IgG antibody kits, Pharmacia & Upjohn, Germany).

Treatment: Seven of the 25 patients were able to afford specific treatment of HCV in form of alpha interferon therapy (a-IFN) given subcutaneously (1-3 million units, thrice weekly). These patients were re-evaluated at the completion of 6 months of treatment with alpha-IFN treatment and all the autoimmune markers were again measured.

Statistical analysis: Fisher's exact test was used to compare the patient and control groups.

Results

The study group of 25 patients with chronic HCV infection had 16 males and 9 females (mean age SD; 3913 yr). The source of infection was blood transfusion in 23 patients and intravenous drug use in two. The control group consisted of 15 males and 10 females (mean age +/- SD; 38 +/- 11.8 yr).

Rheumatological manifestations were seen in 15 (60%) HCV patients (10 males, 5 females). These included arthralgias (56%), arthritis involving small and large joints((%), palpable purpura (44%), myalgias (36%),.and Raynaud's phenomenon (4%). Autoimmune markers were seen in 18 (72%) patients [cryoglobulins, RF and anti LKM 1 antibodies in 8 patients each (32%), ASMA in 6 (24%) pANCA in 5 (20%), ANA in 3 (12%), and anti GPCA in one (4%) patient]. None of the patients had anti dsDNA antibodies, AMA or ACL antibodies. All controls tested negative for autoimmune markers. Statistically significant (P

Discussion

It is being increasingly recognised that the spectrum of HCV infection extends beyond the liver5-8. Apart from extrahepatic manifestations such as Sjogren's syndrome, membranoproliferative glomerulonephritis, arthritis etc., several autoimmune markers viz., ANA, RF, ASMA, ACL have been reported in HCV infection6-8. Humoral autoimmune mechanisms are said to be the connecting link between arthritis and hepatitis. A high proportion (60%) of our patients had rheumatic symptoms. The clinical picture of arthritis (8%lo patients) was indistinguishable from rheumatoid arthritis as has been reported in the literature17,18. The clinical importance of this lies in the fact that patients with anicteric hepatitis C and arthritis may inadvertently get treated with methotrexate with worsening of liver disease. This can be obviated by high index of suspicion and obtaining aminotransferases in all patients with arthritis. Elevated base line aminotransferases should be considered as an indication for hepatitis C screening. Antikeratin antibodies, if present, lend support to the diagnosis of rheumatoid arthritis rather than hepatitis C arthritis19.

No data are available from India regarding the presence of autoimmune markers in hepatitis C. Studies in different population groups from all over the world20-25 reveal that autoimmune markers are frequent in hepatitis C though the frequency varies widely. Cryoglobulins have been reported in 11-36 per cent patients, RF in 44-76 per cent, anti LKM 1 antibodies in 2.4-5 per cent, ASMA 5-66 per cent, ANA 6.2-63 per cent, AMA 1-4 per cent and ACL antibodies in 0-22 per cent patients with HCV. The common autoantibodies detected in our patients were cryoglobulins, RF and anti LKM1 antibodies. However, none of the patients had renal or neurologic disease suggestive of cryoglobulinemic vasculitis syndrome. One drawback of our study is that we could not do the isotyping and clonality analysis of cryoglobulins in our patients. The disappearance of autoimmune markers with treatment suggests a causal link between the markers and HCV. The clinical course and response to treatment in our patients with or without autoimmune markers was similar in keeping with the observations in the literature6,25.

The presence of autoantibodies in hepatitis C appears to be an expression of generalized immune activation by cytokines, although the exact mechanisms are not clearly understood26. The potential of HCV to induce autoreactive CD8(+) cytotoxic T lymphocytes by molecular mimicry may be responsible27. It has also been demonstrated that CD4+ T cells expressing CD45RO and CD95 are increased in HCV. These CD95+ CD45RO+ primed T cells most likely reflect a continuous antigen specific or nonspecific activation of T lymphocytes, and/or the persistent presence of activated lymphocytes as a consequence of abnormalities in the peripheral deletion of activated lymphocytes. These persistently activated lymphocytes may be playing a role in the induction of autoimmunity28.

In conclusion, our study indicates that musculoskeletal symptoms and autoimmune markers are fairly common in HCV infection. Patients presenting with new rheumatic symptoms and risk factors for HCV should be screened for hepatitis C. Further studies are required to establish a link between HCV infection and autoimmunity.

Acknowledgment

The authors thank Prof. R.N. Misra for providing anti LKMI antibody positive serum as control. Expert laboratory work of Sriyuts Titus Varghese, Sube Singh, Gopal Singh and Chandrasenan is gratefully acknowledged.

References

Eng MA, Kallemuchikkal U, Gorevic PD. Hepatitis C virus, autoimmunity and lymphoproliferation. Mt Sinai J Med 2000; 67 : 120-32.

2. Jaiswal SPB, Chitnis DS, Naik G, Artwani KK, Pandit CS, Salgia P, et al. Prevalence of anti-HCV antibodies in central India. Indian JMed Res 1996; 104 : 177-81.

3. Panigrahi AK, Panda SK, Dixit RK, Rao KV, Acharya SK, Dasarathy S, et al. Magnitude of hepatitis C virus infection in India: prevalence in healthy blood donors, acute and chronic liver diseases. J Med Virol 1997; 51 : 167-74.

4. Gosavi MS, Shah SK, Shah SR, Pal RB, Saldanha JA, Banker DD. Prevalence of hepatitis C virus (HCV) infection in Mumbai. Indian J Med Sci 1997; 51: 378-85.

S. Duffy J. Arthritis and hepatitis. Bull Rheum Dis 1998: 47 : 1-5.

6. Cacoub P, Poynard T, Ghillani P, Charlotte F, Olivi M, Piette JC, et al. for the MULTIVIRC Group. Extrahepatic manifestations of chronic hepatitis C. Arthritis Rheum 1999: 42 : 2204-12.

7. Ratiner BD, Gorman JD, Dalkh DI, Rubinion N, Briggs ME, Wright TI, et al. Rheumatic manifestations of hepatitis C. Arthritis Rheum 1999; 42 (Supply: S 339.

8. Gumber SC, Chopra S. Hepatitis C: a multifaceted disease. Review of extrahepatic manifestations. Ann Intern Med 1995; 123 : 615-20.

9. Panigrahi AK, Nayak B, Dixit R, Acharya SK, Panda SK. Evaluation of third generation anti-HCV enzyme immunoassays. Trop Gastroenterol 1998; 19 : 105-7.

10. Singer JM, Plotz CM. The latex fixation test 1. Application to the serologic diagnosis of rheumatoid arthritis. Am J Med 1956; 21: 888-92.

11. Nakamura RM, Peebles CL, Rubin RL, Molden DP, Tan EM, editors. Autoantibodies to nuclear antigens, 2nd ed. Chicago : American Society of Clinical Pathologists Press; 1985 p. 48-54.

12. Rizzetto M, Swana G, Doniach D. Microsomal antibodies in active chronic hepatitis and other disorders. Clin Exp Immunol 1973; 15 : 331-44.

13. Czaja AJ, Manns MP, Homburger HA. Frequency and significance of antibodies to liver/kidney microsome type I in adults with chronic active hepatitis. Gastroenterology 1992; 103 : 1290-5.

14. van der Woude FJ, Rasmussen N, Lobatto S, Wiik A, Permin H, van Es LA, et al. Autoantibodies against neutrophils and monocytes: tool for diagnosis and marker of disease activity in Wegener's granulomatosis. Lancet 1985; i : 425-9.

15. Horsfall AC. Detection and clinical relevance of anti-DNA/ anti-ENA antibodies. Immunol Today 1988; 9 : 159-60. 16. Harris EN, Gharavi AE, Patel SP, Hughes GRV. Evaluation

of the anti-cardiolipin antibody test: report of an international workshop held on 4 April 1986. Clin Exp Immunol 1987; 68 : 215-22.

17. Rivera J, Garcia-Monforte A, Pineda A, Millan NunezCortes J. Arthritis in patients with chronic hepatitis C virus infection. J Rheumatol 1999; 26 : 420-4.

18. Lovy MR, Starkebaum G, Uberoi S. Hepatitis C infection presenting with rheumatic manifestations: a mimic of rheumatoid arthritis. J Rheumatol 1996; 23 : 979-83.

19. Kessel A, Rosner 1, Zuckerman E, Golan TD, Toubi E. Use of antikeratin antibodies to distinguish between rheumatoid arthritis and polyarthritis associated with hepatitis C infection. J Rheumatol 2000; 27: 610-2.

20. Pawlotsky JM, Ben Yahia M, Andre C, Voisin MC, Intrator L, Roudot-Thoraval F, et al. Immunological disorders in C virus chronic active hepatitis: A prospective case control study. Hepatology 1994; 19 : 841-8.

21. zum Buschenfelde KHM, Lohse AW, Gerken G, Treichel U, Lohr HF, Mohr H, et al. The role of autoimmunity in hepatitis C infection. J Hepatol 1995; 22 (Suppl. ) : 93-6.

22. Clifford BD, Donahue D, Smith L, Cable E, Luttig B, Manns M, et al. High prevalence of serological markers of autoimmunity in patients with chronic hepatitis C. Hepatology 1995; 21 : 613-9.

23. Bayraktar Y, Bayraktar M, Gurakar A, Hassanein TI, van Thiel DH. A comparison of the prevalence of autoantibodies in individuals with chronic hepatitis C and those with autoimmune hepatitis: the role of interferon in the development of autoimmune diseases. lepatogastroenterology 1997; 44 : 417-25.

24. Buskila D, Shnaider A, Neumann L, Lorber M, Zilberman D, Hilzenrat N, et al. Musculoskeletal manifestations and autoantibody profile in 90 hepatitis C virus infected Israeli patients. Semin Arthritis Rheum 1998; 28 : 107-13.

25. Luo JC, Hwang SJ, Li CP, Lu RH, Chan CY, Wu JC, et al. Clinical significance of serum autoantibodies in Chinese patients with chronic hepatitis C: negative role of serum viral titre and genotype. J Gastroenterol Hepatol 1998; 13 : 475-9.

26. Abuaf N, Johanet C, Homberg JC. Autoantibodies in autoimmune chronic active hepatitis. In: Krawitt EL, Wiesner RH, editors. Autoimmune liver diseases. New York Raven Press; 1991 p. 93-109.

27. Kammer AR, van der Burg SH, Grabscheid B, Hunziker IP, Kwappenberg KMC, Reichen J, et at. Molecular mimicry of human cytochrome P450 by hepatitis C virus at the level of cytotoxic T cell recognition. JExp Med 1999; /90: 169-76.

28. Ogawa S, Sakaguchi K, Takaki A, Shiraga K, Sawayama T, Mouri H, et al. Increase in CD95 (Fas/APO-I)-positive CD4+ and CD8+ T cells in peripheral blood derived from patients with autoimmune hepatitis or chronic hepatitis C with autoimmune phenomena. J Gastroenterol Hepatol 2000; 15 : 69-75.

N. Agarwal, R. Handa, S.K. Acharya*, J.P. Wali, A.K. Dinda** & P. Aggarwal

Departments of Medicine, *Gastroenrology & **Pathology, All India Insitute of Medical Sciences, New Delhi, India

Received February 5, 2001

Reprint requests: Dr R. Handa, Associate Professor, Department of Medicine, All India Institute of Medical Sciences Ansari Nagar, New Delhi 110029, India

Copyright Indian Council of Medical Research May 2001
Provided by ProQuest Information and Learning Company. All rights Reserved

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