Abstract
Alzheimer's disease (AD) is characterized by cognitive decline, memory loss, and a gradual loss of daily functioning. Unfortunately, despite extensive research, effective treatments for AD remain limited. Of these, stem cell-based therapies show promise for their regenerative potential and ability to modulate pathological processes. Autologous blood-derived stem cells (ABSCs), which are isolated from a patient's own blood, have demonstrated therapeutic efficacy in AD. This clinical study evaluated the safety and efficacy of ABSCs on patients with AD and investigated the changing levels of growth factors derived from ABSCs treatment. The efficacy of the treatment on cognitive function was assessed using the Mini-Mental State Examination, Clinical Dementia Rating, and AD Assessment Scale-Cognitive Subscale, all widely used tools to assess cognitive function in patients with AD. The neuroimaging and molecular mechanisms were the secondary outcomes. The neuroimaging examinations performed included PET-CT with amyloid imaging, for assessing amyloid plaque deposition in the brain at baseline and at 3 and 6 months after treatment; FDG-PET, for measuring brain glucose metabolism and acquiring insights into neuronal activity and overall brain function; and MRI, performed at baseline and follow-up, for assessing structural brain changes. ABSCs treatment resulted in notable improvements in cognitive function, reductions in amyloid plaque burden, and improved neuroimaging outcomes. Autologous stem cell therapy also reduced the risk of immune rejection, offering a safety advantage over allogeneic stem cell therapies. Furthermore, the use of growth factors to enhance stem cell efficacy aligns with existing research demonstrating improvements in stem cell limitations. This study provides compelling evidence that ABSCs combined with growth factors exhibit significant therapeutic potential for patients with moderate to severe AD. Our findings indicate that our current combination treatment may offer a multi-target approach to addressing the complex pathogenesis of neurodegenerative diseases and is thereby a potentially sustainable therapeutic strategy for AD. Furthermore, the combination of ABSCs with growth factors can potentially provide a much-needed therapeutic alternative for AD.