Response to Stress by Riboflavin-Deficient and Pantothenic Acid-Deficient Dogs

Author:

Arnrich Lotte1,Hurley Lucille S.1,Forker Bluebell Reade1,Morgan Agnes Fay1

Affiliation:

1. From the Department of Home Economics, University of California, Berkeley, California

Abstract

Normal, pantothenic acid-deficient and riboflavin-deficient young dogs were forced to swim for 25 minutes at 25°C and their blood glucose and in some cases blood lactic acid levels determined just before, just after and 1 and 2 hours after the test. A sharp rise in blood sugar level, markedly greater in the riboflavin-deficient dogs, occurred just after the swimming stress. An abnormal fall in level occurred in all deficient dogs after 2 hours. Severe under-feeding did not produce this change in a normal dog nor did force feeding alter it in riboflavin-deficient animals. Adrenocortical extract treatment diminished the poststress rise in normal and pantothenic acid-deficient but not in riboflavin-deficient dogs. Epinephrine treatment produced the same effects as swimming on blood sugar and lactic acid levels in normal animals. Adrenocortical extracts caused recovery from pantothenic acid-deficient hypoglycemic collapse but not from the similar riboflavin-deficient collapses. Thus increased sensitivity to insulin and to epinephrine appeared present in riboflavin deficiency and increased insulin sensitivity, normal response to epinephrine but hypocorticalism in pantothenic acid deficiency.

Publisher

American Physiological Society

Subject

Physiology (medical)

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