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DOI: 10.1055/a-1722-2105
Rolle von Vitamin D als Präventionsmaßnahme in der COVID-19 Pandemie
Role of Vitamin D as a Preventive Treatment in COVID-19 PandemiaZusammenfassung
Aktuell ist die Beweislage zu Vitamin D und COVID-19 als vielversprechend, jedoch aufgrund fehlender Daten einer grossen randomisierter Interventionsstudie, als nicht umfänglich belegt zu werten. Mehrere kleinere Interventionsstudien bei COVID-19 Patientinnen und Patienten zeigen gemischte Resultate mit einem Signal, dass die einmalige hohe Bolusgabe von Vitamin D eine neutrale Wirkung hat und hingegen kleinere Dosierungen von Calcifediol in mehrtägigen Intervallen das Risiko einer Intensivmedizin-Behandlung und Mortalität vermindern könnten. Gleichzeitig zeigt die Literatur anhand grosser Beobachtungsstudien ein starkes Signal, dass Menschen mit einem Vitamin D Mangel eine höhere Anfälligkeit bezüglich einer COVID-19 Infektion und auch ein erhöhtes Risiko für schwere Verläufe und Mortalität haben. Diese epidemiologischen Studien bieten jedoch keinen Kausalitätsanspruch. Insbesondere auch weil ein Vitamin D-Mangel häufiger bei Menschen mit Übergewicht und chronischen Erkrankungen wie Diabetes und Herz-Kreislauferkrankungen vorkommt, und diese Faktoren das Risikoprofil für schwerere Verläufe der COVID-19 Infektion abbilden. Auf der mechanistischen Ebene ist Vitamin D ein etablierter Faktor der Immunmodulation, mit Hinweisen, dass eine gute Vitamin D-Versorgung im Rahmen der COVID-19 Infektion die starke Inflammationsreaktion «Zytokin-Sturm» vermindert. Nicht COVID-spezifisch, aber eine Wirkung von Vitamin D auf akute Entzündungen unterstützend, fand eine 2021 publizierte Meta-Analyse von 46 randomisierten klinischen Studien, dass die tägliche Gabe von Vitamin D verglichen zu Placebo, das Risiko jeglicher akuter Atemwegsinfekte um 20 Prozent vermindert. Nimmt man diese Beweislage in der aktuellen Krisensituation einer globalen Pandemie-Situation auf, unterstützt eine umsichtige Risiko-Benefit Analyse, dass eine unmittelbare Volksgesundheitliche Empfehlung zur täglichen Einnahme von Vitamin D als präventive Maßnahme im Rahmen der COVID-Pandemie sinnvoll ist. Dies ist analog zu den heutigen Empfehlungen zur Vitamin D-Supplementation zu sehen, da zudem in den Hochrisiko-Populationen durch die Infektion ein Zusatzrisiko eingeführt wird für die Entwicklung von Sarkopenie und Osteoporose. Ökonomisch und vom Risiko her ist die Maßnahme zudem begründet mit der kostengünstigen breiten Verfügbarkeit und dem hohen Sicherheitsprofil einer täglichen Gabe von Vitamin D.
Abstract
Currently, the evidence on vitamin D and COVID-19 is promising, but due to the lack of data from a large randomized intervention trial, the evidence is not comprehensive. Several smaller intervention studies in COVID-19 patients show inconsistent results with a signal that single high bolus doses of vitamin D have a neutral effect, whereas lower doses of calcifediol at multi-day intervals may reduce the risk of ICU treatment and mortality. At the same time, based on large observational studies, the literature shows a strong signal that people with vitamin D deficiency have a higher susceptibility with respect to COVID-19 infection and also an increased risk of complications and mortality. However, these epidemiologic studies do not provide a causal claim, especially because among other reasons vitamin D deficiency is more common in people with obesity and chronic diseases such as diabetes and cardiovascular disease, and these factors also coin the risk profile for more severe courses of COVID-19 infection.
At the mechanistic level, vitamin D is an established factor in immunomodulation, with evidence that vitamin D administration in the setting of COVID-19 infection reduces the potent inflammatory response "cytokine storm." Albeit not COVID-specific, but supporting an effect of vitamin D on acute inflammation, a meta-analysis of 46 randomized clinical trials published in 2021 found that daily administration of vitamin D, compared with placebo, reduced the risk of any acute respiratory infection by 20 percent.
Taking this evidence into the current crisis of a global pandemic situation, a prudent risk-benefit analysis supports that an immediate public health recommendation to take vitamin D daily as a preventive treatment in the context of the COVID pandemic is reasonable. This is analogous to current recommendations for vitamin D supplementation because, in addition, in high-risk populations, COVID infection introduces an important risk factor for developing sarcopenia and osteoporosis. Economically and in terms of risk, daily vitamin D supplementation is also justified by the cost-effective broad availability and its high safety profile.
Schlüsselwörter
Vitamin D - Immunomodulation - COVID-19-Infektion - Zytokin-Sturm - Muskuloskelettale GesundheitKey words
vitamin D - musculoskeletal health - immunomodulation - COVID-19 infection - cytokine stormPublication History
Received: 07 December 2021
Received: 07 December 2021
Accepted: 14 December 2021
Article published online:
21 February 2022
© 2022. Thieme. All rights reserved.
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