Transneuronal retrograde viral labeling in the brain stem and hypothalamus is more intense from the left than from the right adrenal gland.
Previous studies using the viral transneuronal tracing technique demonstrated central autonomic circuits involved in the innervation of the adrenal gland. Since increasing number of data indicate laterality in the neuroendocrine system, we aimed to investigate whether the supraspinal innervation of the adrenal gland exhibits asymmetry or not. The central circuitry involved in the innervation of the left and the right adrenal gland was studied in individual rats by dual transneuronal tracing using isogenic recombinant strains (Ba-DupGreen and Ba-Duplac expressing lacZ) of Bartha strain of pseudorabies virus. Viral infection of brain nuclei (dorsal vagal nucleus, nucleus of the solitary tract, caudal raphe nuclei, A5 cell group, hypothalamic paraventricular nucleus) from the left adrenal was more severe than that from the right organ. Dual-infected neurons were present both in the brain stem and in the hypothalamus. The results indicate a predominance in the supraspinal innervation of the left adrenal gland, and that each adrenal gland is innervated both by side-specific neurons and by neurons that project to both organs.
Tóth
Ida E
IE
Neuromorphological and Neuroendocrine Research Laboratory, Department of Human Morphology and Developmental Biology, Hungarian Academy of Sciences and Semmelweis University, Semmelweis University, Budapest, Hungary.
Wiesel
Ory
O
Tóth
Dorina E
DE
Boldogkoi
Zsolt
Z
Halász
Béla
B
Gerendai
Ida
I
D000311:Adrenal Glands / Q000166:cytology / Q000294:innervation / Q000378:metabolism / Q000821:virology*; D000818:Animals; D001933:Brain Stem / Q000166:cytology / Q000378:metabolism / Q000821:virology*; D005260:Female; D017930:Genes, Reporter; D005822:Genetic Vectors / Q000235:genetics; D011558:Herpesvirus 1, Suid / Q000235:genetics / Q000378:metabolism*; D007031:Hypothalamus / Q000166:cytology / Q000378:metabolism / Q000821:virology*; D051381:Rats; D013194:Staining and Labeling / Q000379:methods*