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Thyroid Hormone Transporters MCT8 and OATP1C1 are Expressed in Projection Neurons and Interneurons of Basal Ganglia and Motor Thalamus in the Adult Human and Macaque Brain
Wang, T.; Wang, Y.; Montero-Pedrazuela, A.; Prensa, L.; Guadaño-Ferraz, A.; Rausell, E. Thyroid Hormone Transporters MCT8 and OATP1C1 Are Expressed in Projection Neurons and Interneurons of Basal Ganglia and Motor Thalamus in the Adult Human and Macaque Brains. Int. J. Mol. Sci.2023, 24, 9643.
Wang, T.; Wang, Y.; Montero-Pedrazuela, A.; Prensa, L.; Guadaño-Ferraz, A.; Rausell, E. Thyroid Hormone Transporters MCT8 and OATP1C1 Are Expressed in Projection Neurons and Interneurons of Basal Ganglia and Motor Thalamus in the Adult Human and Macaque Brains. Int. J. Mol. Sci. 2023, 24, 9643.
Wang, T.; Wang, Y.; Montero-Pedrazuela, A.; Prensa, L.; Guadaño-Ferraz, A.; Rausell, E. Thyroid Hormone Transporters MCT8 and OATP1C1 Are Expressed in Projection Neurons and Interneurons of Basal Ganglia and Motor Thalamus in the Adult Human and Macaque Brains. Int. J. Mol. Sci.2023, 24, 9643.
Wang, T.; Wang, Y.; Montero-Pedrazuela, A.; Prensa, L.; Guadaño-Ferraz, A.; Rausell, E. Thyroid Hormone Transporters MCT8 and OATP1C1 Are Expressed in Projection Neurons and Interneurons of Basal Ganglia and Motor Thalamus in the Adult Human and Macaque Brains. Int. J. Mol. Sci. 2023, 24, 9643.
Abstract
Monocarboxylate transporter 8 (MCT8) and organic anion-transporting polypeptide 1C1 (OATP1C1) are thyroid hormones (TH) transmembrane transporters relevant for the availability of TH in neural cells, crucial for their proper development and function. Mutations in MCT8 or OATP1C1 result in severe disorders with dramatic movement disability related to alterations in basal ganglia motor circuits. Mapping the expression of MCT8/OATP1C1 in those circuits is necessary to explain their involvement in motor control. We studied the distribution of both transporters in the neuronal subpopulations that configure the direct and indirect basal ganglia motor circuits using immunohistochemistry and double/multiple labeling immunofluorescence for TH transporters and neuronal biomarkers. We found their expression in the medium-sized spiny neurons of the striatum (the receptor neurons of the corticostriatal pathway), and in various types of its local microcircuitry interneurons, including the cholinergic. We also demonstrate the presence of both transporters in projection neurons of intrinsic and output nuclei of the basal ganglia, motor thalamus and nucleus basalis of Meynert, suggesting an important role of MCT8/OATP1C1 for modulating the motor system. Our findings suggest that a lack of function of these transporters in the basal ganglia circuits would significantly impact motor system modulation, leading to clinically severe movement impairment.
Keywords
Thyroid hormones; thyroid hormone transporters; MCT8; OATP1C1; human; monkey; basal ganglia; motor thalamus; MSN cells; nucleus basalis of Meynert
Subject
Biology and Life Sciences, Endocrinology and Metabolism
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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