A New Dawn for Kidney Health: Combining Therapies to Combat Chronic Kidney Disease and Type 2 Diabetes
The landscape of chronic kidney disease (CKD) and type 2 diabetes (T2D) treatment is undergoing a radical shift. Recent findings from the CONFIDENCE trial, presented at the European Renal Association (ERA) Congress 2025 and published in the New England Journal of Medicine, highlight the remarkable potential of combining existing medications to improve outcomes. Specifically, the study demonstrated that the simultaneous use of the SGLT2 inhibitor empagliflozin and the nonsteroidal mineralocorticoid receptor antagonist (MRA) finerenone can significantly and durably reduce albuminuria, a key indicator of kidney damage.
The Power of Combination Therapy: A Paradigm Shift
For years, the approach to treating CKD and T2D has been largely stepwise. However, the CONFIDENCE trial data echoes a growing trend observed in other chronic conditions like heart failure and hypertension: moving towards upfront combination therapy. This approach, rather than treating each condition separately, offers a more holistic and potentially more effective strategy.
Lead researcher Dr. Rajiv Agarwal emphasized the importance of these results, stating that they are “highly relevant for clinical decision-making.” This is supported by the fact that 70% of patients in the trial achieved the American Diabetes Association’s recommended urinary albumin-to-creatinine ratio (UACR) reduction target of > 30% when on combination therapy.
Pro Tip:
Discuss your treatment options with your healthcare provider, especially if you have both CKD and T2D. They can help you determine if combination therapy is right for you, considering your individual health profile.
Understanding the Key Players: Empagliflozin and Finerenone
The success of the combination therapy hinges on the unique mechanisms of action of empagliflozin and finerenone. Empagliflozin, an SGLT2 inhibitor, helps the kidneys remove glucose from the body, reducing blood sugar levels. Finerenone, a nonsteroidal MRA, blocks the harmful effects of aldosterone, which can contribute to kidney damage. Combining these two drugs offers a powerful one-two punch against the progression of CKD in those with type 2 diabetes.
These recent results, presented by Dr. Agarwal, are “remarkable” says session co-chair Mustafa Arici, MD, professor of medicine (nephrology) at Hacettepe University. Arici emphasizes the potential to begin combining an SGLT2 inhibitor and an MRA from the outset to provide robust protection for patients’ kidneys.
Beyond Albuminuria: Looking Ahead to Clinical Endpoints
While the reduction in UACR is a significant achievement, experts are eager to see further data on clinical endpoints like dialysis rates and mortality. Dr. Arici noted the limitations of the study, in the sense that, although the trials had a good amount of follow-up, there was no information on the decrease in dialyses or decreased mortality rates. However, the researchers are optimistic that the positive results on UACR will translate into long-term improvements in these critical measures. A recent mediation analysis suggests a strong correlation between early UACR reductions and later improvements in kidney and cardiovascular outcomes.
Implementing Combination Therapies: A Promising Future
The findings from the CONFIDENCE trial open new avenues for treatment strategies. Co-investigator Peter Rossing, MD, PhD, highlights the four pillars of standard care: ACE inhibitors, ARBs, SGLT2 inhibitors, MRAs, and GLP-1 receptor agonists, and asks the question of how to combine these.
Given the trial results, it is likely that we’ll see a push toward implementing combination therapy earlier in the treatment pathway. Further studies are necessary to determine the optimal combination strategies and patient populations that will benefit most. Clinical trials are ongoing. In 2022, one analysis suggested that steroidal MRAs and SGLT2 inhibitors may have additive effects in reducing UACR, far more than either drug alone.
Did you know?
Combination therapies are becoming increasingly common in medicine. They often work by targeting different pathways of disease, leading to more significant and sustained benefits.
Addressing Potential Side Effects and Safety Considerations
While the benefits of combination therapy are clear, it is essential to address potential side effects. The trial showed a low incidence of hypotension and acute kidney injury. There was also a reduction in treatment-emergent hyperkalemia, compared to finerenone monotherapy.
It is important that healthcare providers closely monitor patients on combination therapy. They should monitor blood pressure, kidney function, and potassium levels. The information gained from this study shows that with proper monitoring, we can expect the benefits to greatly outweigh any potential risks.
Frequently Asked Questions
What are the key benefits of combining empagliflozin and finerenone?
The combination significantly and durably reduces albuminuria, a marker of kidney damage, in patients with CKD and T2D.
Are there any potential risks associated with this combination?
While the trial showed a low incidence of side effects, it’s important to monitor blood pressure, kidney function, and potassium levels.
Who is likely to benefit from this combination therapy?
Patients with both chronic kidney disease (CKD) and type 2 diabetes (T2D) may benefit from this treatment.
What are the next steps for this research?
Further studies will focus on clinical endpoints such as dialysis rates and mortality, to determine the optimal combination strategies.
The Future of CKD and T2D Treatment
The CONFIDENCE trial represents a significant step forward in the treatment of CKD and T2D. By leveraging the power of combination therapy, clinicians may be better equipped to protect kidney health. As more data becomes available, this approach has the potential to transform the lives of millions worldwide. This also is another instance of precision medicine at its best.
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