[Influence of laser radiation of the whole blood in vitro on adhesion and aggregation of blood platelets].

The authors revealed dependence of reaction blood plates to photoeffect on the dose and rate of blood movement at laser radiation of donor blood in vitro. The red light decreases adhesion and aggregation of blood plates both at high and low rate of shift. Infrared laser radiation is effective only at high rate of shift leading to increase of adhesion and decrease of aggregation of blood plates. Blue laser is effective in small doses only and at low rate of sift it leads to decrease of adhesion and at high rate it provokes increase of adhesion. Blue laser do not have a significant influence on aggregation of blood plates. These results make possible to suppose ambiguity of biological response of venous and arterial blood to radiation.

The effect of fish oil on hypertension, plasma lipids and hemostasis in hypertensive, obese, dyslipidemic patients with and without diabetes mellitus.

We have recently reported that dietary fish oil supplementation (n-3) polyunsaturated fatty acid (PUFA) led to a reduction in blood pressure (BP) and serum triglycerides (TG), in addition to the normalization of the hypercoagulable state in subjects with obesity, hypertension and dyslipidemia without diabetes mellitus (OHD-DM). The aim of the present study was to explore the mechanism of this amelioration by comparing the previous results to those obtained from 19 subjects who, in addition to the conditions described above, also suffer from diabetes mellitus (OHD+DM) and proteinuria. In both the non-diabetic and diabetic groups, a similar reduction was observed in BP (from 158.7/80.8 to 146/72.9 mmHg, and from 157.6/83.2 to 141.9/75.6 mmHg, respectively, P<0.001) and TG levels (from 159.2 to 108.0 mg/dl and from 208.7 to 153.1 mg/dl, respectively, P<0.001). However, a favorable reduction in hemostasis parameters (platelet aggregation on extracellular matrix and (alpha2-antiplasmin) was only seen among the nondiabetic patients (from 12.1+/-4.9 to 4.2+/-3.2%, P<0.001). This difference may stem from a less efficient exchange between n-3 and n-6 PUFA in serum phospholipid of the OHD+DM patients. Overall, this 13-day fasting/refeeding method developed by us has proven to cause the rapid exchange of arachidonic acid for eicosapentaenoic acid. It appears to be an effective regimen for the reduction of cardiovascular risk factors (BP, TG and hemostatic variables) in OHD-DM patients and to a lesser extent in OHD+DM patients.

Repeated fasting and refeeding with 20:5, n-3 eicosapentaenoic acid (EPA): a novel approach for rapid fatty acid exchange and its effect on blood pressure, plasma lipids and hemostasis.

Twenty hypertensive subjects participated in three clinical trials of 13 days each, to examine the effects of Alsepa fish oil [20:5, n-3 eicosapentaenoic acid (EPA) 180 mg, and 22:6 n-3 docosahexaenoic acid (DHA) 120 mg] on n-3 for n-6 polyunsaturated fatty acids (PUFA) exchange on serum phospholipids, blood pressure (BP), triglycerides (TG) and primary hemostasis. After 13 days, plasma phospholipids showed an increase in sigma n-3 (EPA and DHA) from 2.0 to 5.9% (P < 0.01), and a decrease in sigma n-6 (arachidonic acid and linoleic acid) from 29.8 to 22.6% (P < 0.01). A concomitantly significant reduction in systolic BP (SBP) (158.7 +/- 23.8 mm Hg to 146.5 +/- 17.0 mm Hg, P = 0.04), and diastolic BP (DBP) (80.8 +/- 8.4 mm Hg to 72.9 +/- 14.9 mm Hg, P = 0.04) as well as a significant decrease in platelet adhesion and aggregation on extra cellular matrix measured as a percentage of surface coverage (11.9 +/- 4.8% to 4.2 +/- 3.2%, P = 0.0001) was observed. In addition, a significant reduction in baseline dependent TG was observed; the higher the baseline level TG, the more pronounced the reduction (average 159.2 +/- 74.6 mg% to 108.0 +/- 46.1 mg%, P = 0.001). No change was observed in total cholesterol, high and low density lipoprotein (HDL, LDL), platelet and fibrinogen. Repeated fasting and refeeding with fish oil facilitated plasma exchange of n-3 for n-6 PUFA, improved BP, clinical metabolic parameters and lowered platelet reactivity in the vessel wall (primary hemostasis). In severe and life-threatening situations, the beneficial effects of fish oil should be considered for rapid exchange of n-3 for n-6 PUFA. In this study we describe a novel approach for rapid fatty acid exchange by fasting/refeeding with fish oil supplementation, as well as improved BP, plasma lipids and primary hemostasis. Further research is required on the therapeutic use of fish oils and the physiological mechanisms involved in fatty acid exchange.