Serum immunoreactive insulin responses to a glucose load in Asian Indian and European Type 2 (non-insulin-dependent) diabetic patients and control subjects

Diabetologia ◽  
1986 ◽  
Vol 29 (4) ◽  
pp. 235-237 ◽  
Author(s):  
V. Mohan ◽  
P. S. Sharp ◽  
H. R. Cloke ◽  
J. M. Burrin ◽  
B. Schumer ◽  
...  
Author(s):  
Jukka H Meurman ◽  
Hanna-Leena Collin ◽  
Leo Niskanen ◽  
Jari Töyry ◽  
Pekka Alakuijala ◽  
...  

Diabetologia ◽  
1987 ◽  
Vol 30 (5) ◽  
pp. 305-309 ◽  
Author(s):  
H. A. W. Neil ◽  
E. A. M. Gale ◽  
S. J. C. Hamilton ◽  
I. Lopez-Espinoza ◽  
R. Kaura ◽  
...  

1996 ◽  
Vol 91 (5) ◽  
pp. 559-565 ◽  
Author(s):  
Paetrick M. Netten ◽  
Hub Wollersheim ◽  
Theo Thien ◽  
Jos A. Lutterman

1. In the feet of patients with diabetic neuropathy, total skin blood flow is increased due to an increased shunt flow. The question is, does this increased anastomotic shunt flow lead to either under- or overperfused nutritive capillaries. 2. To solve this question, skin microcirculation tests of the left big toe were performed in 20 healthy control subjects and in 40 insulin-dependent diabetic patients without macroangiopathy, 20 without and 20 with neuropathy. Skin temperature measurements and laser Doppler fluxmetry were performed to record mainly shunt flow and capillaroscopy to study nailfold capillary blood flow. 3. The insulin-dependent diabetic patients with neuropathy had a higher baseline skin temperature (mean ± SEM; 30.0 ± 0.6°C) and laser Doppler fluxmetry [26.2 ± 2.2 perfusion units (pu)] than patients without neuropathy (27.2 ± 0.8°C, P < 0.01; 16.1 ± 2.0 pu, P < 0.01) and healthy control subjects (27.9 ± 0.7°C, P < 0.05; 18.6 ± 2.8 pu, P < 0.05). Sympathetic stimulation (inspiratory gasp) resulted in a smaller laser Doppler fluxmetry decrease in the neuropathic patients (31.4 ± 4.6%) compared with non-neuropathic patients (48.2 ± 5.1%, P < 0.05) and control subjects (49.0 ± 3.8%, P < 0.05), while no difference between the three groups was seen in the laser Doppler fluxmetry decrease during a postural vasoconstriction test. The number of visible capillaries was highest in the neuropathic patients (10.2 ± 0.6/0.5 mm2), when compared with non-neuropathic patients (8.7 ± 1.2/0.5 mm2, P < 0.05) and control subjects (8.3 ± 0.3/0.5 mm2, P < 0.001). Capillary blood-cell velocity was significantly higher in the neuropathic patients (0.32 ± 0.05 mm/s) compared with non-neuropathic patients (0.23 ± 0.03 mm/s, P < 0.05) and control subjects (0.23 ± 0.02 mm/s, P < 0.01). 4. We conclude that there is an overperfused nutritive capillary circulation in the feet of patients with diabetic neuropathy. This is in contradiction to the capillary steal phenomenon and favours the hyperdynamic hypothesis to explain the decreased healing potential in diabetic neuropathic foot ulceration.


1993 ◽  
Vol 138 (3) ◽  
pp. 565-572 ◽  
Author(s):  
M. Tepel ◽  
S. Bauer ◽  
S. Husseini ◽  
A. Raffelsiefer ◽  
W. Zidek

ABSTRACT Cytosolic free sodium concentrations ([Na+]i) in intact platelets from 32 type 2 (non-insulin-dependent) diabetic patients and from 27 age- and sex-matched non-diabetic control subjects were measured with the novel sodium-sensitive fluorescent dye sodium-binding-benzofuran-isophthalate. [Na+]i was significantly higher in platelets from type 2 diabetic patients compared with control subjects (40·6 ± 2·4 vs 32·0 ± 2·0 mmol/l, means ± s.e.m., P<0·03). Both systolic and diastolic blood pressure were significantly elevated in diabetic patients compared with control subjects. Analysis of diabetic patients showed a significant association between [Na+]i and diastolic blood pressure (P =0·026). Stimulation of Na/H exchange by thrombin increased [Na+]i in both groups. After inhibition of Na/K/ATPase by ouabain (1 mmol/l), [Na+]i was significantly increased both in diabetic patients and non-diabetic subjects in a similar way (by 40·2 ± 7·3 and 31·7 ± 5·3 mmol/l respectively). It is concluded that increased [Na+]i in cells from type 2 diabetic patients may be related to hypertension. Journal of Endocrinology (1993) 138, 565–572


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