The present invention relates to peptides, in particular of
amyloid inhibitory peptides, and to pharmaceutical compositions comprising such peptides, for use in methods of treating or preventing or delaying the onset of
synucleinopathies, in particular of Parkinson's
disease (PD) or
dementia with Lewy bodies, and their comorbidities, in particular PD / type 2 diabetes (T2D) and PD / Alzheimer's
disease (AD). Furthermore, the present invention relates to such peptides, in particular such
amyloid inhibitory peptides, for use in methods of diagnosing such
synucleinopathies and related comorbidities. Furthermore, the present invention also relates to a kit for the in-vitro or in-vivo detection and, optionally, quantification of amyloidogenic polypeptides,
amyloid fibrils or amyloid aggregates, and / or for the diagnosis of
synucleinopathies and related comorbidities, in particular PD / type 2 diabetes (T2D) and PD / Alzheimer's
disease (AD), in a patient.