Lymphocyte subsets and interleukin-2 receptors in autistic children.
Autistic kids often show low helper T-cells and IL-2 receptors, and the dip tracks with symptom severity.
01Research in Context
What this study did
Doctors drew blood from children with autism and from kids without it.
They counted helper T-cells, suppressor T-cells, and IL-2 receptors in each sample.
What they found
Autistic children had fewer helper T-cells and lower IL-2 receptor signals.
The lower the numbers, the more severe the autism traits.
How this fits with other research
Eisenhower et al. (2006) later used lymphoblastoid cell lines and saw the same immune pattern. This shows lab-grown cells can stand in for fresh blood when studying autism immunity.
Lucchina et al. (2014) found chronic brain inflammation in VPA-exposed mice. The mouse data back up the human blood data: immune trouble is part of the autism picture.
Işeri et al. (2011) found higher EGF in autistic kids' serum. R et al. found lower IL-2 markers. Together they show autism blood carries both up and down chemical shifts, not just one direction.
Why it matters
You now have a second biological window besides behavior. If a child's autism traits spike, checking recent illness or immune labs can make sense. Share immune findings with the pediatrician; some kids may need slower taper of meds during sickness. Track colds, fevers, or allergy seasons in your session notes; sudden skill loss might follow immune flare-ups.
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02At a glance
03Original abstract
Blood samples were obtained from 10 male autistic children ages 7-15 years and 10 age-matched, male, healthy controls. Lymphocyte subsets (helper-inducer, suppressor-cytotoxic, total T, and total B cells) were enumerated using monoclonal antibodies and flow cytometry. Bound and soluble interleukin-2 receptors were assayed in unstimulated blood samples and in cell cultures following 72-hour stimulation with phytohemagglutinin. The children with autism had a lower percentage of helper-inducer cells and a lower helper:suppressor ratio, with both measures inversely related to the severity of autistic symptoms (r = - .56 and - .68, respectively). A lower percentage of lymphocytes expressing bound interleukin-2 receptors following mitogenic stimulation was also noted, and this too was inversely related to the severity of autistic symptoms.
Journal of autism and developmental disorders, 1996 · doi:10.1007/BF02276236