Abstract
Earlier concepts of the neuroendocrine system integrated the regulatory functions of the nervous and endocrine systems, a concept that was developed from the understanding of hypothalamic control over the secretions of the anterior pituitary gland and pituitary control of its target endocrine organs. Demonstration of feedback controls, chiefly negative, furthered the argument for an intimate relationship between the nervous and endocrine systems. However, the role of the hypothalamic and pituitary hormones, all of which are peptides, is not restricted to their classical endocrine actions but extends to profound effects on the CNS. Experiments showing that adrenocorticotropic hormone (ACTH) affects complex behavioral processes such as learning and memory in adrenalectomized rats, demonstrated clearly that this peptide was acting directly on CNS neurons, bypassing its endocrine target, the adrenal cortex. This concept of a direct action was extended to learning and memory in humans, as well as to the peripheral neuromuscular system through the use of synthetic fragments of ACTH devoid of adrenocortical-stimulating activity [1-4] (see sections 5.1.2 and 5.4).
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Abbreviations
- Ach:
-
acetylcholine
- ACTH:
-
adrenocorticotrophic hormone
- AD:
-
Alzheimer's disease
- AgRP:
-
agouti-related protein
- Arg:
-
arginine
- CGRP:
-
calcitonin-gene related peptide
- CCK:
-
cholecystokinin
- CNS:
-
central nervous system
- CRH:
-
corticotropin-releasing hormone
- DRG:
-
dorsal root ganglia
- ER:
-
endoplasmic reticulum
- GABA:
-
Îł-aminobutyric acid
- GH:
-
growth hormone
- GHRH:
-
growth hormone releasing hormone
- HPA:
-
hypothalamic-anterior pituitary-adrenal axis
- IGF-I:
-
insulin-like growth factor
- Lys:
-
lysine
- MSH:
-
melanocyte-stimulating hormone
- NMDA:
-
N-methyl-D-aspartate
- OT:
-
oxytocin
- PC:
-
prohormone convertase
- POMC:
-
proopiomelanocortin
- PPP:
-
pancreatic polypeptide
- PRL:
-
prolactin
- RER:
-
rough endoplasmic reticulum
- ST:
-
somatostatin
- TRH:
-
thyrotropin-releasing hormone
- VIP:
-
vasoactive intestinal peptide
- VP:
-
vasopressin
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Strand, F.L. (2003). Neuropeptides: general characteristics and neuropharmaceutical potential in treating CNS disorders. In: Prokai, L., Prokai-Tatrai, K. (eds) Peptide Transport and Delivery into the Central Nervous System. Progress in Drug Research, vol 61. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8049-7_1
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