HANS SELYE AND THE STRESS RESPONSE: FROM "THE FIRST MEDIATOR" TO THE IDENTIFICATION OF THE HYPOTHALAMIC CORTICOTROPIN-RELEASING FACTOR.
Level 5 - mechanism / opinion, no new human data
Historical narrative review with no new empirical human data (CEBM Level 5).
What was done
This historical review describes the conceptual development of the stress response, tracing Hans Selye's 1936 observation of the stress triad (adrenal enlargement, thymus involution, gastric erosions) and his hypothesis of a hypothalamic mediator to Roger Guillemin's 1955 demonstration of corticotropin-releasing factor (CRF) activity in rats and Wylie Vale's 1981 peptide sequencing and receptor cloning.
What was found
The abstract reports no quantitative experimental data or statistical metrics. It narrates the historical lineage leading from Selye's initial stress triad hypothesis to Guillemin's extraction of hypothalamic factors stimulating adrenocorticotropic hormone release, followed by Vale's characterization of CRF as a 41-amino-acid peptide and the cloning of CRF1 and CRF2 receptors.
Why it matters
The paper outlines the historical foundation of neuroendocrine stress research, illustrating how early physiological observations evolved into modern molecular mapping of brain CRF pathways governing autonomic, behavioral, endocrine, and visceral responses.
Limits
This work is a narrative biographical and historical overview rather than an empirical trial or systematic review, presenting no novel data, sample sizes, or quantitative outcome measures.
Cited by
- supports Hans Selye showed that in stressed animals, the adrenal glands enlarge, the gastric lining is damaged, and the thymus and lymphatic glands shrink.