Duration of any change remains unclear. Published follow-up spans 3 to 12 months in most autism trials; longer data are scarce. Some families report sustained behavioural shifts, others describe effects fading over months. Repeated infusions are often discussed, which itself suggests providers do not expect a single course to be permanent. No trial has established whether any effect plateaus, declines, or needs maintenance dosing.
Autism Spectrum Disorder stems from alterations in neuronal connectivity and immune signalling during neurodevelopment. Stem-cell research explores whether mesenchymal stem cells derived from placental tissue or amniotic membrane can modulate neuroinflammation, support synaptic plasticity, and promote neural integration. These cells are selected because they secrete immunoregulatory factors and can differentiate into supportive glial cells. Neurogenic cells are also being studied to repair damaged neural circuits, while exosomes — extracellular vesicles released by stem cells — are examined as vehicles for delivering anti-inflammatory signals to the brain. Current approaches remain investigational; the evidence base comprises preclinical work and early clinical trials. No mechanism yet explains why or how stem cells would alter the core neurobiological features of autism in humans.
Am I a candidate? → · Autism Spectrum Disorder: full overview → · Autism Spectrum Disorder cost → · Cost →
Medically reviewed by StemCellAtlas’s editorial team with Kiian Nadiia, MD, PhD (Paediatric Neurologist · Medical Director, CSM Clinic Network · 12+ yrs in Autism Spectrum Disorders) of partner clinic Stem Plus (Sofia), against ISSCR, FDA & EMA guidance. Educational information, not medical advice; figures indicative.
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