Search PubMed⌕ Search

Biomedical subjects

C Grunfeld

Publications and source records attributed to C Grunfeld.

188 records · Page 11Linked to original sources
PubMed1978

Otitis media.

Explore the source record for details and available documents.

Acute Disease↗
PubMedDate not supplied

Effect of interleukin-1 on lipid metabolism in the rat. Similarities to and differences from tumor necrosis factor.

Infection and inflammation are associated with hypertriglyceridemia, which is thought to be mediated by cytokines. Previous studies at our laboratory and others have shown that tumor necrosis factor acutely increases serum triglyceride levels primarily by stimulating hepatic lipid synthesis and secretion. The role of interleukin-1 (IL-1), a cytokine that is also secreted by stimulated macrophages and that has many actions that overlap those of tumor necrosis factor, has not been studied in depth. The present study demonstrates that IL-1, at doses similar to those that cause fever and anorexia and that stimulate adrenocorticotropic hormone secretion, rapidly increases serum triglyceride levels; this elevation persists for at least 17 hours. Serum cholesterol levels are not altered by IL-1. Neither is the clearance of triglyceride-rich lipoproteins affected by IL-1. However, hepatic triglyceride secretion, measured by the Triton WR-1339 technique, is increased in IL-1-treated animals. Accompanying this stimulation in hepatic lipid secretion is an increase in de novo fatty acid synthesis in the liver. IL-1 does not increase serum free fatty acid and glycerol levels, suggesting that IL-1 does not stimulate lipolysis in vivo. Additionally, inhibition of lipolysis does not prevent the increase in serum triglyceride levels, providing further evidence that lipolysis does not play a crucial role in the increased hepatic lipid synthesis and secretion induced by IL-1. In contrast, tumor necrosis factor increases lipolysis, which contributes to the increase in serum triglycerides. That multiple cytokines rapidly elevate plasma triglyceride levels suggest that these changes in lipid metabolism may play an important role in the organism's response to infection and inflammation.

Animals↗
PubMedDate not supplied

Use of liquid crystal thermography in the evaluation of the diabetic foot.

Liquid crystal thermography (LCT) was used to determine temperature variations on the plantar surface of feet. The purpose was to identify thermal emission patterns associated with diabetic foot ulcers. Three population groups were screened: group I, 16 nondiabetic controls; group II, 21 diabetic patients with no history of pedal ulcers; and group III, 28 diabetic patients with active pedal ulceration or history of foot ulcerations. The results demonstrate a generalized increase in plantar foot temperature in group III compared with groups I and II. Temperature readings under metatarsal heads 1-5, great toe, heel, and lateral band were significantly increased (P less than .01) in group III. Additionally, the warm lateral surface displayed by group III patients was not significantly different in temperature from the medial arch of the foot. In groups I and II, the lateral band was significantly cooler (P less than .01) than the medial arch. In group III patients with active ulceration on only one foot, no significant difference in temperature was found between the foot with active ulceration compared with the contralateral nonulcerated foot. When patients with active pedal ulceration were compared with patients with a history of foot ulcers, no significant difference in temperature was seen at five of seven sites tested. A warm concentric color band surrounding active plantar ulcers was identified in group III. This pattern extended from the center of the ulcer to a distance of 8 mm. A significant change in temperature (P less than .01) was noted at 6- and 8-mm distances from the center of the ulcer. In addition, a mottled thermographic pattern was observed more frequently in group III patients than in groups I and II.(ABSTRACT TRUNCATED AT 250 WORDS)

Diabetic Angiopathies↗
PubMedDate not supplied

Ketonuria in hospitalized patients with non-insulin-dependent diabetes mellitus.

Physicians routinely order urinary ketone testing for most patients with diabetes mellitus upon hospitalization, even in the absence of a history of diabetic ketoacidosis. To determine whether testing for urinary ketones is clinically useful in patients with non-insulin-dependent diabetes mellitus (NIDDM), a retrospective review was undertaken of 152 charts of patients admitted to the hospital during a 6-mo period with the diagnosis of diabetes mellitus. Of the 135 patients with NIDDM, 96% had routine testing performed for urinary ketones. Surprisingly, 26% of the patients with NIDDM had positive urine ketones at some time during hospitalization, and the degree of ketonuria was markedly greater did not reflect diabetic ketoacidosis. Ketonuria was accompanied by significant hyperglycemia and most likely reflects relative insulinopenia. Only 23% of the episodes of ketonuria were acknowledged in the progress notes. Although NIDDM patients who had ketonuria in the hospital were more likely to be transiently treated with insulin than patients without ketonuria, in no instance did the progress notes state that a diagnostic test or change in therapy was ordered because of the presence of a positive test for urinary ketones. The primary goal for therapy of patients with NIDDM should remain good control of blood glucose. In the hospitalized patient in whom frequent blood glucose determinations are made, it is not clear that urinary ketone testing needs to be routinely done.

Adult↗