Estrogen and hyperaggregability of platelets measured by the screen filtration pressure (SFP) method in Takayasu's disease

Platelet aggregability in 10 females (32.2 ± 3.1 years) with Takayasu’s disease and 16 healthy males (31.7 ± 2.7 years) and 14 females (28.6 ± 2.8 years) was measured by the screen filtration pressure (SFP) method. SFP of the healthy males was 202.6 ± 5.4 mm Hg at 3<i> μM</i> and 118.5 ± 8.0 mm e Hg at 1 /m of ADP, and of the healthy females 264.9 ± 14.3 mm Hg at 3 <i>μM</i> and 162.8 ± 11.9 mm Hg at 1 <i>μM</i> of ADP. SFP of the Takayasu’s disease patients was 360.0 ± 35.7 mm Hg at 3 <i>μM</i> and 229.2 ± 32.5 mm Hg at 1 <i>μM</i> of ADP. The difference between the three groups above was significant (p < 0.05). A positive correlation (r = 0.887, p < 0.05) between SFP at 3 <i>μM</i> of ADP of the patients and the daily urinary estrogen excretion was recognized.

Effects of adrenaline and noradrenaline on euglobulin lysis time and effects of adrenergic receptor blocking agents on shortening of lysis time by adrenaline

Adrenaline in an intravenous dose of 0.1 µg per kg induced a significant shortening of the euglobulinlysis time in 8 healthy subjects. On the other hand, the euglobulin lysis time was not hastened by intravenous injections of the same dose of 1-noradrenaline in 8 healthy subjects. The shortening of the euglobulin lysis time induced by 0.1 µg per kg of adrenaline was blocked by the pretreatment with 300 mg of nethalide in 8 healthy subjects but not blocked by the pretreatment with 30 mg of phenoxybenzamine in 5 healthy subjects.

The effects of oestrogens on bluing lesions by bradykinin and histamine

The anti-bradykinin effect of oestrogens in the vascular permeability-increasing effect of bradykinin in the skin of rabbits was demonstrated by Miles and Miles's technique, i. e. by the so-called bluing lesions. Thus,