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In the sections that follow, studies by Fatemi and colleagues address this issue and demonstrate that protein expression http://en.wikipedia.org/wiki/NK_cells does indeed follow the receptor changes for both GABAA and GABAB receptors in a variety of structures in the autism brain. In the previous section, we discussed autoradiography experiments dealing with mRNA localization and receptor densities/affinities for various GABA receptors in a number of brain sites in subjects with autism and matched controls. In this section of the article we will discuss localization and, specifically, protein expression studies for GABAA and GABAB receptors using conventional biochemical techniques of SDS-PAGE and western blotting in various brain areas of subjects with autism and matched controls (Fatemi et al.,2009a,b). It is well known that cerebellar abnormalities in autism are more extensive than other areas in brain and include loss of granular and Purkinje cells (Ritvo et al.,1986; Bauman and Kemper,2005) and atrophy of Purkinje cells (Fatemi et al.,2002), and may be responsible for motor associated dysfunction in autism (Nayate et al.,2005). Here, we measured levels of four GABAA receptors (GABR��1, GABR��2, GABR��3, and GABR��3) and two GABAB receptors (GABBR1 and GABBR2) (Fig. 2). All values were normalized against a housekeeping gene, ��-actin and expressed as ratios to ��-actin to provide a more accurate measure of specific changes in levels of GABAA and GABAB receptors. http://www.selleckchem.com/products/Gefitinib.html http://www.selleckchem.com/products/DAPT-GSI-IX.html There were reductions of 27�C63% in ratios of GABAA receptors/��-actin in cerebella of subjects with autism (Fatemi et al.,2009b). However, only GABR��1 and GABR��3 reached statistical significance (P