Related Experiment Videos
[Hemodynamic mechanisms of lupus nephritis progression]
Insights
Abnormal intrarenal hemodynamics (IRHD) are common in lupus nephritis (LN) and linked to hypertension. Angiotensin-converting enzyme (ACE) inhibitors improved IRHD and blood pressure in LN patients.
Area of Science:
- Nephrology
- Immunology
- Cardiovascular Medicine
Background:
- Lupus nephritis (LN) is a severe complication of systemic lupus erythematosus.
- Intrarenal hemodynamics (IRHD) play a crucial role in kidney function and disease progression.
- Abnormalities in IRHD are suspected contributors to LN pathogenesis.
Purpose of the Study:
- To investigate the role of abnormal intrarenal hemodynamics (IRHD) in the progression of lupus nephritis (LN).
- To assess the therapeutic response of IRHD to angiotensin-converting enzyme (ACE) inhibitors in LN patients.
Main Methods:
- Study included 30 LN patients, with 19 experiencing active LN exacerbation.
- Intrarenal hemodynamics (IRHD) assessed via renal functional reserve (RFR) with protein loading, clinical activity, renal function, and blood pressure.
- Patients received ACE inhibitors (captopril, ramiprilol) for 6 months, with repeated assessments.
Main Results:
- 37% of LN patients exhibited disturbed IRHD, exacerbated by hypertension.
- ACE inhibitor therapy significantly reduced blood pressure and improved IRHD within 6 months.
- Pre-treatment, 46% of patients lacked RFR; post-treatment, only 1 patient did.
Conclusions:
- Defects in IRHD are frequent in lupus nephritis and associated with hypertension and disease activity.
- ACE inhibitors show promise for managing hypertension in LN patients.
- Further studies are needed to confirm the long-term efficacy of ACE inhibitors in LN.
Aim:
To study the role of abnormal intrarenal hemodynamics (IRHD) in progression of lupus nephritis (LN) and its response to therapy with inhibitors of angiotensin-converting enzyme (ACE).
Materials And Methods:
The trial included 30 LN patients (27 females, 3 males; age 29.8+(-)10.4 years). 19 had aggravation of active LN. All the patients were free of chronic renal insufficiency. IRHD was studied with estimation of renal functional reserve (RFR) using protein loading, evaluation of clinical activity of LN and renal function, blood pressure. The tests were repeated after 6 months of treatment with ACE inhibitors (captopril and ramiprilol) in 13 patients (11 of them had exacerbation of active LN).
Results:
Disturbed IRHD was found in 37% of the patients. Blood hypertension deteriorated this condition. Treatment with ACE inhibitors in 6 months brought about a significant decrease in blood pressure and improvement of IRHD. Before treatment RFR was absent in 46% of patients, after treatment in 1 patient.
Conclusion:
Defects in IRHD occur in LN frequently. These are related with the presence of blood hypertension and activity of LN. Inhibitors of ACE seem perspective in management of essential hypertension in LN patients but this hypothesis needs confirmation by the results of further studies.