SGLT2 Inhibitors: Effect on Myocardial Infarction and Stroke in Type 2 Diabetes

BACKGROUND

Sodium-glucose cotransporter-2 inhibitors (SGLT2i) have recently been recommended as preferred agents for management of hyperglycemia in type 2 diabetes, primarily based on their ability to reduce a composite of major cardiovascular adverse events (3-point major adverse cardiovascular events [MACE]), predominantly by reducing cardiovascular death. However, reduction of the individual components, myocardial infarction (MI), or stroke (fatal and nonfatal) events have not been well explored.

METHODS

In this meta-analysis, we included data available from cardiovascular outcome trials only, which were event-driven, randomized, and placebo-controlled. Pooled efficacy outcomes included Mantel Haenszel (MH) risk ratio using fixed model (with 95% CI) for fatal and nonfatal MI, stroke, and total MI and stroke.

FINDINGS

Data from 4 eligible trials included 42,568 subjects. Total MACE, MI, and stroke were reported in 4176, 2157, and 1288 subjects, respectively. SGLT2is did not significantly reduce either MI or stroke individually or in totality. The MH risk ratio (95% CI) for fatal and nonfatal MI and stroke with different SGLT2is was found to be 0.93 (95% CI, 0.85-1.01) and 1.00 (95% CI, 0.89-1.11), respectively. For total atherosclerotic cardiovascular disease (ASCVD) events, MH risk ratio (95% CI) was 0.95 (95% CI, 0.89-1.02). For all nonfatal ASCVD (combined nonfatal MI and nonfatal stroke), MH risk ratio (95% CI) was 0.94 (95% CI, 0.88-1.02).

INTERPRETATION

SGLT2is reduce MACE without any discernable significant reduction of the incidence of MI or stroke (fatal and nonfatal), probably implicating mechanisms unrelated to anti-atherogenic effects.

Implantable cardioverter defibrillator for primary prevention in patients with non-ischemic cardiomyopathy in the era of novel therapeutic agents- meta-analysis

Background

Evidence regarding the mortality benefit of implantable cardioverter defibrillator (ICD) non-ischemic dilated cardiomyopathy (NIDCM) is inconsistent. The most recent randomized study, the DANISH trial, did not find improved outcomes with ICD. However, based on previous studies and meta-analyses, current guidelines still highly recommend ICD implantation in NIDCM patients. The introduction of novel medications for heart failure improved the clinical outcome dramatically. We aimed in this study to evaluate the effect of Angiotensin Receptor-Neprilysin Inhibitors (ARNi) and sodium-glucose transport protein 2 inhibitors (SGLT2i) on the mortality benefit of ICD in NIDCM.

Methods

We used a previous metanalysis algorithm and added an updated comprehensive literature search in PubMed for randomized control trials that examined the mortality benefit of ICD in NIDCM vs. optimal medical treatment. The primary outcome included death from any cause. We did a meta-regression analysis to search for a single independent factor affecting mortality. Using previous data, we evaluated the theoretical effect of ICD implementation on patients treated with SGLT2 inhibitors and ARNi.

Results

No new articles were added to the results of the previous meta-analysis. 2,622 patients with NIDCM from 5 cohort studies published between 2002 and 2016 were included in the analysis. 50% of them underwent ICD implantation for primary prevention of sudden cardiac death, and 50% did not. ICD was associated with a significantly decreased risk for death from any cause compared to control (OR = 0.79, 95%CI: 0.66-0.95, p = 0.01, I² = 0%). The theoretical addition of ARNi and the SGLT2 inhibitor dapagliflozin did not change the significant mortality effect of ICD (OR = 0.82, 95%CI: 0.7-0.9, p = 0.001, I² = 0%) and (OR = 0.82, 95%CI: 0.7-0.9, p = 0.001, I² = 0%). A meta-regression revealed no association between death from any cause and left bundle branch block (LBBB), use of amiodarone, use of angiotensin-converting enzyme inhibitors (ACEi) or angiotensin receptor blockers, year initiated enrollment, and the year ended enrollment (R² = 0.0).

Conclusion

In patients with NIDCM, the addition of ARNi and SGLT2i did not affect the mortality advantages of ICD for primary prevention.

PROSPERO registry number

https://www.crd.york.ac.uk/prospero/, identifier: CRD42023403210.

Prevalence of genitourinary infection in diabetic patients treated with SGLT 2 inhibitors

Introduction

Genitourinary infections are common in Diabetes patients compared to the general population more so in patients with Sodium glucose co transporter 2 inhibitors (SGLT2i) treatment , So, we did a study to find the prevalence of genitourinary infection in T2DM patients treated with SGLT2i.

Methods

One hundred and twenty patients receiving SGLT2i, who had signs and symptoms indicative of genitourinary infections were enrolled into the study.

Results

The mean age of presentation was 54.4 ± 7.7 years and percentage of males were 62 (51.66%). In this cohort, 72(60%) were treated with empagliflozin, 34(28.33%) with dapagliflozin and 14(11.66%) with canagliflozin. Twenty patients had genital mycotic infection and 4 had urinary tract infection. Female patients had higher incidence of infections than male patients with no statistically significant difference (P = ns). We did not find any significant correlation between age of the patient, gender, duration of disease and treatment, HbA1c, different types and dose of SGLT2i used with the incidence of genital mycotic infections (P = ns).

Conclusion

We need to counsel the patients before starting SGLT2i regarding possible chance of getting genitourinary infection, proper genital hygiene, drinking plenty of water and consulting the doctor if any symptoms at the earliest.

Obesity-associated cardiometabolic complications in polycystic ovary syndrome: The potential role of sodium-glucose cotransporter-2 inhibitors

Polycystic Ovary Syndrome (PCOS) is the most common endocrine disorder in reproductive-age women. PCOS is characterized by androgen excess, oligo/anovulation, and polycystic appearance of the ovaries. Women with PCOS have an increased prevalence of multiple cardiovascular risk factors such as insulin resistance, hypertension, renal injury, and obesity. Unfortunately, there is a lack of effective, evidence-based pharmacotherapeutics to target these cardiometabolic complications. Sodium-glucose cotransporter-2 (SGLT2) inhibitors provide cardiovascular protection in patients with and without type 2 diabetes mellitus. Although the exact mechanisms of how SGLT2 inhibitors confer cardiovascular protection remains unclear, numerous mechanistic hypotheses for this protection include modulation of the renin-angiotensin system and/or the sympathetic nervous system and improvement in mitochondrial function. Data from recent clinical trials and basic research show a potential role for SGLT2 inhibitors in treating obesity-associated cardiometabolic complications in PCOS. This narrative review discusses the mechanisms of the beneficial effect of SGLT2 inhibitors in cardiometabolic diseases in PCOS.

Factors affecting prescription of sodium-glucose co-transporter 2 inhibitors in patients with type 2 diabetes mellitus with established cardiovascular disease/ chronic kidney disease in Hong Kong: a qualitative study

BACKGROUND

Sodium-glucose co-transporter 2 inhibitors (SGLT2 I) has cardiorenal protective properties and are recommended for patients with diabetes and established atherosclerotic cardiovascular disease (ASCVD) and/or chronic kidney disease (CKD). Although cardiorenal complications are high in diabetes and pose a significant financial burden on the Hong Kong health care system, the use of SGLT2 I in these populations remains low. And yet this issue has not been explored in Hong Kong primary care. This study aimed to explore factors affecting primary care doctors' prescribing of SGLT2 I in patients with diabetes and established ASCVD/CKD in Hong Kong.

METHODS

A phenomenological qualitative research using semi-structured interviews was conducted between January and May 2021 in one Hospital Authority cluster in Hong Kong. Purposive sampling was employed to recruit primary care doctors in the cluster. The Theoretical Domains Framework (TDF) underpinned the study and guided the development of the interview questions. Data was analysed using both inductive and deductive approaches. The Consolidated criteria for reporting qualitative research (COREQ) checklist was used to guide the reporting.

RESULTS

Interviews were conducted with 17 primary care doctors. Four overarching themes were inductively identified: knowledge and previous practice patterns influence prescription, balancing risks and benefits, doctors' professional responsibilities, and system barriers. The four themes were then deductively mapped to the nine specific domains of the TDF: knowledge; intention; memory; beliefs about capabilities; beliefs about consequences; goals; role and identity; emotion; and environmental constraints. Most interviewees, to varying extent, were aware of the cardio-renal advantages and safety profile of SGLT2 I but are reluctant to prescribe or change their patients to SGLT2 I because of their knowledge gap that the cardio-renal benefits of SGLT2 I was independent of glyacemic efficacy. Other barriers included their considerations of patients' age and renal impairment, and patients' perceptions and preferences.

CONCLUSIONS

Despite evidence-based recommendations of the utilisation of SGLT2 I in patients with established ASCVD/CKD, the prescription behaviour among primary care doctors was affected by various factors, most of which were amendable. Our findings will inform the development of structured interventions to address these factors to improve patients' cardio-renal outcomes.

Online searches for SGLT-2 inhibitors and GLP-1 receptor agonists correlate with prescription rates in the United States: An infodemiological study

Several clinical trials have demonstrated that many SGLT-2 inhibitors (SGLT2i) and GLP-1 receptor agonists (GLP-1 RA) can reduce the risk of cardiovascular events in patients with Type 2 diabetes and atherosclerotic cardiovascular disease. Recent reports indicate an underutilization of new cardiometabolic drugs, including SGLT2i and GLP-1 RA. We aimed to evaluate the use of online search volumes to reflect United States prescription rates. A repeated cross-sectional analysis of Google search volumes and corresponding data from the IQVIA National Prescription Audit (NPA) of pharmacy dispensing of newly prescribed drugs was performed. Monthly data for online searches and prescription between January 1, 2016 and December 31, 2021 were collected for selected SGLT2i and GLP-1 RA. Prescription data for drugs classes (SGLT2i and GLP-1 RA) and individual drugs were calculated as the total of queried data for branded drug names. Trends were analyzed for visual and quantitative correlation as well as predictive patterns. Overall, online searches increased by 157.6% (95% CI: 142.2-173.1%) and 295.2% (95% CI: 257.7-332.6%) for SGLT2i and GLP-1RA between 2016 and 2021. Prescription rates raised by 114.6% (95% CI: 110.8-118.4%) and 221.0% (95% CI: 212.1-229.9%) for SGLT2i and GLP-1RA for this period. Correlation coefficients (range 0.86-0.99) were strongest for drugs with growing number of prescriptions, for example dapagliflozin, empagliflozin, ertugliflozin, dulaglutide, and semaglutide. Online searches might represent an additional tool to monitor the utilization trends of cardiometabolic drugs. Associations were strongest for drugs with reported cardioprotective effect. Thus, trends in online searches complement conventionally acquired data to reflect and forecast prescription trends of cardiometabolic drugs.

SGLT2 Inhibitors: A Broad Impact Therapeutic Option for the Nephrologist

Since their introduction as antidiabetic drugs, SGLT2 inhibitors (SGLT2i) have come a long way, proving to be beneficial on cardiovascular and renal outcomes independently of diabetes status. The benefits go far beyond glycemic control, and both the cardio- and nephroprotection are underpinned by diverse mechanisms. From the activation of tubule glomerular feedback and the consequent reduction in hyperfiltration to the improvement of hypoxia and oxidative stress in the renal cortex, SGLT2i have also been shown to inhibit hepcidin and limit podocyte damage. Likewise, they improve cardiac metabolism and bioenergetics, and reduce necrosis and cardiac fibrosis and the production of adipokines, cytokines, and epicardial adipose tissue mass. In terms of outcomes, the efficacy has been demonstrated on blood pressure control, BMI, albuminuria, stroke, heart disease, and mortality rate due to cardiovascular events. Patients with chronic kidney disease and proteinuria, with or without diabetes, treated with some SGLT2i have a reduced risk of progression. The analysis of subgroups of individuals with specific diseases such as IgA nephropathy has confirmed this solid effect on renal outcomes. Given these overarching activities on such a broad pathophysiological background and the favorable safety profile that goes with the use of SGLT2i, it is now certain that they are changing our approach to clinical interventions for important outcomes with an impressive impact.

The Evolving Role of the Cardiologist in the Management of Type 2 Diabetes

PURPOSE OF REVIEW

To evaluate the treatment of type 2 diabetes from a cardiologist's view.

RECENT FINDINGS

A new era in the treatment of type 2 diabetes began for the cardiologist in 2015 with the publication of the EMPA-REG outcome trial finding a significant reduction in CV death with empagliflozin (oral sodium-glucose co-transporter-2 [SGLT2] inhibitor) in patients with type 2 diabetes at increased cardiovascular risk. Shortly thereafter, the injectable glucagon-like peptide agonists (GLP-1) liraglutide and semaglutide found a significant reduction in composite major cardiovascular events (CV death, non-fatal MI, or stroke). Both classes have demonstrated significant renal protection when added to usual care. Moreover, there may be some exciting new benefits of SGLT2 inhibitors for patients with heart failure. These research studies are underway. These two new classes of cardiovascular drugs for type 2 diabetes usher in a new era for the cardiologist who sees greater than 50% of patients with diabetes. The off-target effect of these agents is different as with all new cardiovascular compounds. While safety profiles in these populations are consistent with the known effects of these classes, new off-target effects have been seen with some agents in this class. Ongoing collaboration between cardiologists and other care providers remains important in the implementation of the evidence and care of patients with type 2 diabetes.