Angiotensin-Receptor Blockers (ARBs) and risk of Alzheimer´s Disease: A meta-analysis

Author(s):  
Teodoro J. Oscanoa ◽  
José Amado ◽  
Xavier Vidal ◽  
Roman Romero-Ortuno

Background: Antihypertensive medications may reduce the incidence of cognitive disorders. This may be due to reasons beyond their pure hypotensive effect. This study aimed to systematically review the association between the use of Angiotensin-Receptor Blockers (ARBs)and the incidence of Alzheimer’s Disease (AD). Methods: We systematically searched studies reporting the association between ARB use and incidence of AD. Results: Ten studies (1 RCT, 2 case-control studies and 7 cohort studies) met the inclusion criteria. When all observational studies (9) were analyzed, ARB use was associated with a reduced risk of incident AD (HR 0.72, 95% CI: 0.58-0.88, p<0.001). In the only RCT, the decrease in the incidence of AD was also significant (HR= 0.31,95% CI:0.14-0.68). Conclusion: ARB use may reduce the risk of incident AD. This association does not imply causation and further research is required to clarify potential mechanisms.

Heart ◽  
2020 ◽  
Vol 106 (19) ◽  
pp. 1519-1524 ◽  
Author(s):  
Maria Elena Flacco ◽  
Cecilia Acuti Martellucci ◽  
Francesca Bravi ◽  
Giustino Parruti ◽  
Rosaria Cappadona ◽  
...  

ObjectiveIt has been hypothesised that the use of ACE inhibitors and angiotensin receptor blockers (ARBs) might either increase or reduce the risk of severe or lethal COVID-19. The findings from the available observational studies varied, and summary estimates are urgently needed to elucidate whether these drugs should be suspended during the pandemic, or patients and physicians should be definitely reassured. This meta-analysis of adjusted observational data aimed to summarise the existing evidence on the association between these medications and severe/lethal COVID-19.MethodsWe searched MedLine, Scopus and preprint repositories up to 8 June 2020 to retrieve cohort or case–control studies comparing the risk of severe/fatal COVID-19 (either mechanical ventilation, intensive care unit admission or death), among hypertensive subjects treated with: (1) ACE inhibitors, (2) ARBs and (3) both, versus untreated subjects. Data were combined using a random-effect generic inverse variance approach.ResultsTen studies, enrolling 9890 hypertensive subjects were included in the analyses. Compared with untreated subjects, those using either ACE inhibitors or ARBs showed a similar risk of severe or lethal COVID-19 (summary OR: 0.90; 95% CI 0.65 to 1.26 for ACE inhibitors; 0.92; 95% CI 0.75 to 1.12 for ARBs). The results did not change when both drugs were considered together, when death was the outcome and excluding the studies with significant, divergent results.ConclusionThe present meta-analysis strongly supports the recommendation of several scientific societies to continue ARBs or ACE inhibitors for all patients, unless otherwise advised by their physicians who should thus be reassured.


2021 ◽  
Vol 54 (3) ◽  
pp. 275-276
Author(s):  
Kanwal Ashiq ◽  
Sana Ashiq

Dear Editor, In December 2019, a new virus which is known as SARS-COV-2 (COVID-19) was identified. In a short period, this virus spread rapidly and caused significant morbidities and mortalities across the earth. On March 11, 2020, the World Health Organization (WHO) declared a pandemic due to the logarithmic expansion of COVID-19 cases globally.1 Various guidelines were issued, and a complete lockdown has been observed on a large scale to stop the spread of the virus. Currently, there is no specific treatment for COVID-19 is available. Throughout the year 2020, scientists struggled a lot to find the COVID-19 cure, and many vaccines are successfully developed which would be helpful in the prevention of disease. Nevertheless, the emergence of virus variants remains an issue. The epidemiological trends and clinical features of this disease have been reported in several publications.2 Due to comorbidities, COVID-19 disease can exacerbate and may result in increased severity and deadly consequences. In a study, the most common comorbidities in COVID-19 patients were reported as following; diabetes (19%), hypertension (30%), and coronary heart disease (8%). In hypertension, blood pressure elevates from the threshold level. The occurrence of hypertension is not necessarily to be associated with COVID-19 as hypertension is quite frequent in geriatric patients, and these patients are at higher risk of being infected with COVID-19.3,4 Angiotensin receptor blockers (ARBs) and angiotensin-converting enzyme (ACE) inhibitors are widely prescribed for the cure of hypertension and other cardiovascular-related diseases. On the other hand, the COVID-19 virus binds with ACE2 to gain entry into the lung cells. ACE inhibitors and ARBs escalate ACE2 that could hypothetically increase the chance of COVID-19 binding to lung cells and could headway to more damage. Conversely, in experimental studies, ACE2 showed a protective effect against lung injury. Due to the anti-inflammatory potential of ACE inhibitors and ARBs, these agents can reduce the incidence of developing myocarditis and acute respiratory distress syndrome in COVID-19 patients. There is no evidence that hypertension is linked with the COVID-19 and anti-hypertensive medicines (ACE inhibitors and ARBs) are either harmful or beneficial during the COVID-19 pandemic.5 During this unprecedented situation, the Council on Hypertension of the European Society of Cardiology released a statement that “The Council on Hypertension strongly recommends that physicians and patients should continue treatment with their usual anti-hypertensive therapy because there is no clinical or scientific evidence to suggest that treatment with ACEIs or ARBs should be discontinued because of the COVID-19 infection.” After this announcement, many other societies also recommend that patients should continue using their current hypertensive therapy and if necessary, after careful assessment, changes can be made in the hypertensive regimen.6 According to estimation, globally, 1.5 billion people can suffer from hypertension by 2025 which may contribute approximately 75% of stroke risk and 50% of heart disease risk. CVDs accounts almost 38% of deaths related to the non-communicated disease (NCDs). In Pakistan, hypertension is a chief health concern that leads to significant morbidity and mortality. Blood pressure can be control with medications and lifestyle modifications. One of the best approaches to control and improve blood pressure is team-based care consisting of doctors, pharmacists, and nurses. During COVID-19, collaborative efforts are required to improve patient’s quality of life and to reduce the healthcare burden.7,8 Keywords: COVID-19, Hypertension, Pandemic, ACE inhibitors References Ashiq K, Bajwa MA, Ashiq S. COVID-19 Pandemic and its Impact on Pharmacy Education. Turkish J Pharma Sci. 2021;18(2):122. Ashiq K, Ashiq S, Bajwa MA, Tanveer S, Qayyum M. Knowledge, attitude and practices among the inhabitants of Lahore, Pakistan towards the COVID-19 pandemic: an immediate online based cross-sectional survey while people are under the lockdown. Bangladesh J Med Sci. 2020:69-S 76. Zhou F, Yu T, Du R, Fan G, Liu Y, Liu Z, et al. Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study. Lancet. 2020;395(10229):1054-62. Ashiq S, Ashiq K. The Role of Paraoxonase 1 (PON1) Gene Polymorphisms in Coronary Artery Disease: A Systematic Review and Meta-Analysis. Biochem Genet. 2021:1-21. Schiffrin EL, Flack JM, Ito S, Muntner P, Webb RC. Hypertension and COVID-19. Am J Hypertens. 2020;33(5):373–374. Patel AB, Verma A. COVID-19 and angiotensin-converting enzyme inhibitors and angiotensin receptor blockers: what is the evidence? JAMA. 2020;323(18):1769-70. Riaz M, Shah G, Asif M, Shah A, Adhikari K, Abu-Shaheen A. Factors associated with hypertension in Pakistan: A systematic review and meta-analysis. PLoS One. 2021;16(1):e0246085. Zarei L, Karimzadeh I, Moradi N, Peymani P, Asadi S, Babar Z-U-D. Affordability assessment from a static to dynamic concept: a scenario-based assessment of cardiovascular medicines. Int J Environ Res Public Health. 2020;17(5):1710.


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