International Journal of Molecular Sciences Article Vitamin D and Its Analogues Decrease Amyloid-β (Aβ) Formation and Increase Aβ-Degradation Marcus O. W. Grimm 1,2,3,*,† ID , Andrea Thiel 1,† ID , Anna A. Lauer 1 ID , Jakob Winkler 1, Johannes Lehmann 1,4, Liesa Regner 1, Christopher Nelke 1, Daniel Janitschke 1,Céline Benoist 1, Olga Streidenberger 1, Hannah Stötzel 1, Kristina Endres 5, Christian Herr 6 ID , Christoph Beisswenger 6, Heike S. Grimm 1 ID , Robert Bals 6, Frank Lammert 4 and Tobias Hartmann 1,2,3 1 Experimental Neurology, Saarland University, Kirrberger Str. 1, 66421 Homburg/Saar, Germany;
[email protected] (A.T.);
[email protected] (A.A.L.);
[email protected] (J.W.);
[email protected] (J.L.);
[email protected] (L.R.);
[email protected] (C.N.);
[email protected] (D.J.);
[email protected] (C.B.);
[email protected] (O.S.);
[email protected] (H.S.);
[email protected] (H.S.G.);
[email protected] (T.H.) 2 Neurodegeneration and Neurobiology, Saarland University, Kirrberger Str. 1, 66421 Homburg/Saar, Germany 3 Deutsches Institut für DemenzPrävention (DIDP), Saarland University, Kirrberger Str. 1, 66421 Homburg/Saar, Germany 4 Department of Internal Medicine II–Gastroenterology, Saarland University Hospital, Saarland University, Kirrberger Str. 100, 66421 Homburg/Saar, Germany;
[email protected] 5 Department of Psychiatry and Psychotherapy, Clinical Research Group, University Medical Centre Johannes Gutenberg, University of Mainz, Untere Zahlbacher Str. 8, 55131 Mainz, Germany;
[email protected] 6 Department of Internal Medicine V–Pulmonology, Allergology, Respiratory Intensive Care Medicine, Saarland University Hospital, Kirrberger Str.