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Published on: September 15, 2017
THE ADRENALIN INDEX OF THE SUPRARENAL GLANDS IN HEALTH AND DISEASE
V P Sydenstricker1, B J Delatour, G H Whipple
1Hunterian Laboratory of Experimental Pathology, Johns Hopkins Medical School, Baltimore.
This study examines the concentration of adrenalin in the adrenal glands, termed the adrenalin index, across various health and disease states. Researchers found that this index fluctuates significantly due to acute intoxication, anesthesia, and specific metabolic conditions, providing insights into how systemic stress impacts adrenal hormone storage.
Area of Science:
- Endocrinology research within the adrenalin index framework
- Pathophysiology of adrenal gland function
Background:
The precise regulation of hormone storage within endocrine organs remains a complex area of physiological inquiry. Prior research has shown that glandular contents fluctuate under various systemic stressors. That uncertainty drove investigators to quantify hormone levels in specific tissues. No prior work had resolved the exact concentration ranges across diverse pathological states. This gap motivated a systematic evaluation of hormone density in suprarenal tissues. It was already known that chemical assays provide superior precision compared to older physiological techniques. This investigation builds upon established colorimetric methods to standardize measurements. Researchers sought to define baseline values to better understand how disease alters these internal reserves.
Purpose Of The Study:
The aim of this study is to define the adrenalin index and evaluate its fluctuations across various health and disease states. Researchers sought to establish a standardized metric for hormone concentration within the suprarenal glands. This investigation addresses the need for accurate quantification of glandular reserves during systemic stress. The authors aimed to determine how acute intoxication, anesthesia, and chronic illness alter these specific hormone levels. By comparing physiological values with chemical colorimetric measurements, the team intended to improve diagnostic precision. This work explores the impact of liver poisons and metabolic disturbances on internal hormone storage. The study also investigates whether specific diseases, such as diabetes or anemia, correlate with consistent changes in these indices. Ultimately, the researchers intended to provide a comprehensive overview of how systemic pathology affects the functional capacity of the adrenal glands.
Main Methods:
Review Approach involved systematic quantification of hormone concentrations within glandular tissues using standardized chemical assays. Investigators processed samples from both canine models and human autopsy cases to establish comparative baselines. The team utilized short ether anesthesia followed by carotid bleeding to collect specimens from experimental subjects. Researchers prioritized colorimetric techniques to ensure high precision in determining the weight of the hormone per gram of tissue. Review Approach included examining the stability of samples kept on ice to account for post-mortem degradation. The study design necessitated careful documentation of the time elapsed between death and tissue extraction. Investigators compared findings from healthy subjects against those suffering from various systemic intoxications and chronic illnesses. This methodology allowed for the identification of significant variations in hormone storage across diverse physiological conditions.
Main Results:
Key Findings From the Literature demonstrate that normal canine subjects exhibit an index ranging from 1.2 to 1.8 milligrams per gram. Human subjects typically show values between 0.35 and 0.50 milligrams per gram when examined shortly after death. Acute intoxication from intestinal obstruction causes a dramatic reduction, sometimes dropping to one-fourth of normal levels. Key Findings From the Literature reveal that liver poisons like phosphorus or hydrazine decrease the index to approximately half of the normal value. Pancreas removal leads to a substantial decline in hormone concentration in feline models. Pernicious anemia stands out as the only condition identified to cause an abnormally high index, reaching at least double the normal value. Neoplasm and tuberculosis are associated with a marked fall, potentially reducing the index to less than half of normal. Diseases involving elevated blood pressure show no consistent variation, remaining either normal or slightly subnormal.
Conclusions:
Synthesis and Implications suggest that the adrenalin index serves as a sensitive marker for systemic physiological stress. The authors propose that acute intoxication and severe metabolic disturbances lead to significant depletion of glandular hormone stores. Findings indicate that recovery phases may trigger compensatory mechanisms resulting in transiently elevated hormone levels. The data imply that chronic conditions like neoplasm or tuberculosis contribute to a marked reduction in these reserves. Synthesis and Implications highlight that certain diseases, such as pernicious anemia, uniquely result in abnormally high hormone concentrations. The authors suggest that the spleen and adrenal glands might interact in lipid metabolism regulation. Evidence indicates that elevated blood pressure does not consistently correlate with changes in these specific hormone indices. This review underscores the variability of glandular responses depending on the underlying pathological process.
Frequently Asked Questions
The researchers propose that acute intoxication, such as that caused by closed duodenal loop poisons, triggers a severe drop in the index. Conversely, recovery from sublethal toxic doses or chloroform poisoning allows the index to rise rapidly, sometimes exceeding normal baseline levels.
The authors utilize a chemical colorimetric method to quantify the hormone concentration, expressed as milligrams per gram of gland tissue. This approach is preferred over physiological testing because it offers greater accuracy and consistency in measuring the specific hormone content within the suprarenal glands.
The researchers state that the duration and depth of anesthesia are necessary factors influencing the observed decline in hormone levels. Prolonged exposure to agents like ether or chloroform consistently leads to a measurable reduction in the glandular index compared to baseline states.
The index represents the hormone concentration in milligrams per gram of gland tissue. This quantitative data type allows for the comparison of adrenal function across different species, such as humans and dogs, and helps identify significant deviations from normal physiological ranges during disease.
The researchers measured the index in normal humans who died from trauma or aneurysm rupture. They observed values ranging from 0.35 to 0.50 milligrams per gram, provided that the autopsy was performed within a few hours after death to prevent significant tissue deterioration.
The authors suggest that the spleen and adrenal glands might be involved in lipoid metabolism. This implication arises from the observation that pernicious anemia, a condition linked to lipid metabolic disturbances, is the only disease associated with an abnormally high adrenalin index.
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