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Type of immune and complement deposits and response of immunosuppressive treatment on Membranoproliferative
Salman Imtiaz1, Murtaza Fakhruddin Dhrolia1, Kiran Nasir1
1The Kidney Centre Postgraduate Training Institute, Karachi.
Insights
Steroids and cyclophosphamide offer a better response for membranoproliferative glomerulonephritis, especially when treated early. This combination therapy shows improved outcomes compared to steroids alone in patients with specific immune deposit patterns.
Area of Science:
- Nephrology
- Immunology
- Pathology
Background:
- Membranoproliferative glomerulonephritis (MPGN) is a kidney disease characterized by immune complex deposition.
- Classification based on immune and complement deposits can influence treatment response.
- Understanding these patterns is crucial for effective therapeutic strategies.
Purpose of the Study:
- To evaluate the efficacy of steroid and cyclophosphamide treatment in MPGN based on immune and complement deposit patterns.
- To compare the response to steroid monotherapy versus combination therapy with cyclophosphamide.
- To identify factors influencing treatment outcomes in MPGN.
Main Methods:
- Retrospective study of 54 MPGN patients treated between 1996 and 2013.
- Patients classified into two groups: Complement factor 3 (C3) deposits only, and C3 with immunoglobulin deposits.
- Comparison of treatment response to steroid alone versus steroid with cyclophosphamide, considering disease severity and fibrosis.
Main Results:
- The group with C3 and immunoglobulin deposits (37 patients) was larger than the C3-only group (17 patients).
- Combination therapy with steroid and cyclophosphamide showed a higher response rate (88.9% vs. 37.5% in C3-only; 66.7% vs. 54.5% in C3 with immunoglobulin) compared to steroid alone.
- Increasing interstitial fibrosis and renal dysfunction significantly hampered treatment response (p=0.014 and p=0.001, respectively).
Conclusions:
- Combined steroid and cyclophosphamide therapy demonstrates a beneficial role in treating MPGN.
- Early initiation of treatment is key for better outcomes.
- Treatment effectiveness is influenced by the pattern of immune deposits and the extent of renal damage.
Objective:
To see the response of steroid and cyclophosphamide if membranoproliferative glomerulonephritis is classified by pattern of immune and complement deposits.
Methods:
The retrospective study was conducted at The Kidney Centre, Karachi, and comprised patients treated for membranoproliferative glomerulonephritis between 1996 and 2013. Records of patients who were not treated with immunosuppressive medications were excluded. Patients were classified according to the types of immune deposits; one group had patients with only Complement factor 3 deposits, and the other with Complement factor 3 and immunoglobulin deposits. The effect of steroid alone and steroid with cyclophosphamide was observed on two histological patterns, according to the severity of kidney dysfunction and degree of interstitial fibrosis. SPSS 17 was used for statistical analysis.
Results:
Of the 54 patients, 31(57%) were males and 23(42%) were females, with an overall mean age of 30.26±15.41 years. Group with Complement factor 3deposits had 17(31%) patients, while that with Complement factor 3 and immunoglobulin had 37(68%). Both groups were similar in terms of clinical and laboratory parameters (p>0.05). Both groups showed better response when treated with steroid and cyclophosphamide: 8/9(88.9%) vs. 3/8(37.5%) in Complement factor 3 only; and 10/15(66.7%) vs. 12/22(54.5%) in Complement factor 3 with immunoglobulin. Increasing severity of interstitial fibrosis (p=0.014) and presence of renal dysfunction (p=0.001) hampered the response. After adjusting the confounders, the odds ratio of response was 4.654(95%confidence interval: 0.957-22.63) in patients who received the treatment with steroid and cyclophosphamide compared to steroid alone.
Conclusions:
Steroids and cyclophosphamide together have a beneficial role if treatment is initiated early in the course of the disease.
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