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Glomerular diseases in patients with hepatitis C virus infection after renal transplantation
J M Morales1, J M Campistol, A Andrés
1Nephrology Department, Hospital Universitario 12 de Octubre, Madrid, Spain.
Insights
Hepatitis C virus (HCV) infection is linked to kidney transplant complications, causing specific glomerular diseases like membranoproliferative glomerulonephritis (MPGN) and membranous glomerulonephritis (MGN). Early HCV testing is crucial for diagnosing proteinuria in transplant recipients.
Area of Science:
- Nephrology
- Hepatology
- Transplantation Immunology
Background:
- Hepatitis C virus (HCV) is a primary cause of chronic liver disease in renal transplant recipients.
- HCV is associated with various glomerular diseases, notably membranoproliferative glomerulonephritis (MPGN) and membranous glomerulonephritis (MGN).
Purpose of the Study:
- To investigate the occurrence and characteristics of glomerular diseases in HCV-positive renal transplant patients.
- To highlight the importance of HCV screening in the differential diagnosis of proteinuria post-transplantation.
Main Methods:
- Analysis of clinical data and renal biopsy findings in HCV-positive renal transplant patients.
- Comparison of glomerular disease prevalence in HCV-positive versus HCV-negative transplant recipients.
Main Results:
- HCV-positive patients frequently developed MPGN (with or without cryoglobulinemia) and MGN after transplantation.
- Proteinuria, nephrotic syndrome, and microhematuria were common clinical presentations.
- MGN in this cohort typically occurred without cryoglobulinemia, hypocomplementemia, or rheumatoid factor.
- HCV infection may also be related to transplant glomerulopathy.
- Glomerular diseases appeared more common in HCV-positive than HCV-negative patients.
Conclusions:
- Hepatitis C virus infection is a significant factor in the development of glomerular diseases following renal transplantation.
- Screening for HCV infection, including HCV RNA detection and immunological tests, is essential for renal transplant patients presenting with proteinuria.
Abstract:
Currently, it is well known that hepatitis c virus (HCV) represents the major cause of chronic liver disease in renal transplant patients. On the other hand, HCV has been described in association with different types of glomerular diseases, usually type I membranoproliferative glomerulonephritis (MGPN) and less frequently membranous glomerulonephritis (MGN). After renal transplantation two glomerular entities have described in HCV positive patients: MPGN, associated or not with cryoglobulinemia, hypocomplememtemia and rheumatoid factor and another lesion was MGN. All patients had chronic HCV infection and with detectable HCV RNA in the serum, developed proteinuria, nephrotic syndrome and microhematuria. Characteristically MGN occurs without cryoglobulinemia, hypocomplememtemia and rheumatoid factor. The clinical pictures and outcomes of these pathological pictures seem to be similar to those of the novo MPGN or MGN in renal transplant patients. These entities seem to be more frequent in HCV-positive than in HCV-negative patients. Also, a possible relationship between HCV infection and transplant glomerulopathy has been described. Therefore, in renal transplant patients with proteinuria, serology for HCV infection, HCV RNA and immunological tests should be performed as part of the differential diagnosis.