The aetiology of autism essay

Indeed, the two principal component of ASD are neurological malfunction and immune system dysfunction. The cerebrospinal fluid derived from autistic patients likewise showed a unique proinflammatory profile of cytokines, including a marked increase in MCP-1[ 38 ].

While some forms of autism are clearly genetic, the fact remains that heritability factors cannot adequately explain all reported cases nor their drastic increase over the last few decades. Notably, neuropathological examinations on autistic brains by Vargas et al.

Repeated administration of bacterial and viral antigens most of which are adsorbed to Al adjuvants through present vaccination schedules Table 1 is clearly analogous both in nature and timing to peripheral immune stimulation with microbial mimetics in experimental animals during early periods of developmental vulnerability of the CNS.

Moreover, our results are in agreement with Lukiw et al. Consistent with this, in a recent analysis comparing the prevalence of autism with that of other disabilities among successive birth cohorts of U.

Using standard log-likelihood ratio techniques, Seneff et al.

Concurrent with aberrant cytokine profiles, various studies have shown abnormal levels of blood lymphocytes, incomplete or partial activation of T-cells following stimulation, as well as lower levels and decreased activity of circulating natural killer NK cells in ASD[ 225253 ].

Al is both a neurotoxin and an immunotoxin and there is now sufficient evidence from both human and animal studies that cumulative exposure to this adjuvant is not as benign as previously assumed.

Etiology of autism spectrum disorders: Genes, environment, or both?

However, some of these are also shown to be more frequently present in patients with schizophrenia and mental retardation than controls, thus raising questions about specificity to ASD[ 55 ]. With respect to Al in the vaccine adjuvant form, in the last decade, studies on animal models and humans have indicated that Al adjuvants have an intrinsic ability to inflict adverse neurological and immuno-inflammatory manifestations[ 9192, ].

Al salts are the most widely used adjuvants in current use. Evidence for an environmental etiology in autism Extensive research has underscored the tight connection between development of the immune system and that of the CNS, thus substantiating the notion that disruption of critical events in immune development may play a role in neurobehavioral disorders including those of the autism spectrum[ 4950 ].

Nonetheless, it should be noted that Thimerosal was subsequently re-introduced to vaccines administered to pregnant women as well infants of 6 months of age and then yearly throughout childhood in the form of multi-dose flu vaccines[ 83 ].

The authors noted that because of the reported high heritability of autism, a major focus of research in autism has been on finding the underlying genetic causes, with less emphasis on potential environmental triggers.

In total 7 genes showed changes in expression. This is also a period during which children worldwide are routinely exposed to the majority of Al-adjuvanted vaccines. In contrast to Hg, Al continues to be used in most paediatric and adult vaccines as an adjuvant, as it has been for almost 90 years since [ 84 ].

Prior genetic susceptibilities may in such cases only determine the degree of severity of manifestations of the disease spectrum, rather than being the principal driving factor in their increase.

That second insult could conceivably be that from Al from various sources including paediatric vaccines, although clearly other toxicants may also be involved.

That adjuvant Al can induce proinflammatory responses in the brain including a dramatic activation of glial cells has been repeatedly shown in the literature[ 9192 ].

Hg has historically been used in some vaccines in the form of an ethyl Hg compound, trade marked as Thimerosal, a bacteriostatic agent.Aetiology of autism: findings and questions * Authors. M. Rutter. Corresponding author. SGDP Centre, Institute of Psychiatry, Denmark Hill, London, UK; In the remainder of this paper I will confine attention to what is known about the aetiology of autism and the more closely associated autism spectrum disorders (ASD), and for the most part.

For citation purposes: Shaw CA, Sheth S, Li D, Tomljenovic L. Etiology of autism spectrum disorders: Genes, environment, or both? OA Autism Jun 10;2(2) Autism Speaks is dedicated to increasing awareness of autism spectrum disorders, to funding research into the causes, prevention and treatments for autism, and to advocating for the needs of individuals with autism and their families.


Study: Prenatal Exposure to. This paper will attempt to explore the many faces of autism: identification, possible causes, treatment, societal reaction/interaction, the learning Fair Use Policy; Help Centre; If you are the original writer of this essay and no longer wish to have the essay published on the UK Essays website then please click on the link below to.

The Etiology of Autism - The Etiology of Autism Autism is a syndrome that is characterized by the impairment of social interaction skills, verbal and nonverbal communication, and a decreased interest in participating in a variety of activities.

Review critically the key theoretical perspectives upon the aetiology of is a psychiatric disorder characterized by impairments in three domains: social interaction, communication, and restricted and repetitive behaviors and interests.

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The aetiology of autism essay
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