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Biomedical subjects

G M Ferraris

Publications and source records attributed to G M Ferraris.

12 recordsLinked to original sources
PubMed1984

Hyperglycaemic clamp and insulin binding to isolated monocytes before and after glibenclamide treatment of mild type II diabetics.

The therapeutic action of 3.5 mg glibenclamide (HB 420) once a day for six weeks was evaluated in ten mild NID diabetics previously treated with diet only. Stable HbA1, insulin secretion during hyperglycaemic clamp (100 mg/dl over the baseline in the first study, and at the same level in the second one), peripheral sensitivity expressed as the amount of dextrose infused per Kg per min (M-coefficient), the glucose metabolic clearance rate (MCR) and the M/I ratio were measured. Circulating monocytes were separated to assess insulin binding before and after treatment. The results included a significant decrease in HbA1 (7.5 +/- 0.3 against 8.4 +/- 0.4%, P less than 0.005), increased steady-state (100-120 min.) plasma insulin (31 +/- 4.4 against 25.7 +/- 3.9 microU/ml), a significant increase in M-coefficient (4.02 +/- 0.62 against 2.49 +/- 0.31 mg/Kg/min, P less than 0.01), and MCR (1.90 +/- 0.34 against 1.18 +/- 0.18 ml/Kg/min, P less than 0.025) and an increase in the M/I ratio (14.6 +/- 1.9 against 11.2 +/- 1.7). All subjects displayed an increase in total insulin binding (4.03 +/- 0.31% against 2.79 +/- 0.34%, P less than 0.001) and affinity constants (Ke = 8.3 +/- 0.6 against 6.6 +/- 0.4 X 10(7) M-1, P less than 0.05). Since the M/I ratio increased in only 7/10 subjects and since there was no significant correlations between the percentage increase in M and MCR and the plasma insulin increase, whereas the increase in R0 was significant, it is felt that the euglycaemizing action of low doses of glibenclamide is primarily peripheral.(ABSTRACT TRUNCATED AT 250 WORDS)

Blood Glucose↗
PubMed1982

Acute effect of prednisone and deflazacort on glucose tolerance in prediabetic subjects.

The diabetogenic effect of deflazacort (DF), an oxazolinic synthetic corticosteroid, was studied in 12 healthy adult subjects with a positive family history of diabetes mellitus. Three oral glucose tests (oGTT) were performed at 9.00 a.m., after a 12 h fast, following randomized administration of Placebo (PL), or Deflazacort (DF 36 +36 mg) or Prednisone (PN 30 + 30 mg) 12 and 2 h before the test. Plasma glucose (BG), insulin (IRI), non-esterified fatty acids, (NEFA), total cholesterol (CL), HDL-cholesterol (HDL-CL) and triglycerides (TG) were measured at time 0, and BG, IRI, NEFA were again measured 30, 60, 90 and 120 min after oGTT. PN was followed by a significant increase in BG over the PL values in accordance with the prediabetic state of these subjects, and there was also an increase in IRI values. No change in CL, HDL-CL and TG was found. AFter DF administration, there was a small increase only in BG and IRI over PL values. The differences between DF- PL were not significant, but those between PL-PN and DF-PN were significant at p less than 0.05 (Scheffe's test). The lesser metabolic effect of DF on glucose balance by comparison with PN, as shown by these results, is consistent with previous reports of its lower osteopaenic effect. Thus, DF may be more suitable than PN and similar corticosteroids for corticosteroid therapy in prediabetic and diabetic subjects.

Adult↗