Calcium and Complement Action

Cxxx. Calcium and Complement Action

Commentary: Brain calcium and morphine action.

Although it was shown as long ago as the late 1930s and early 1940s that a high calcium diet prevented or delayed the development of tolerance and dependence to morphine in guinea pigs and rats [6,7], no further studies on the effect of calcium on opiate action were reported until 1966. Intracisternal or subcutaneous administration of calcium prevented the analgesic effect of morphine and meper...

Action mirroring and action understanding in children

The past decade has experienced an increasing interest in action underestanding and children’s mirroring of others’ behavior. Behavioral investigations have focused on the development and significance of mimicry, goal prediction and imitation. Others have focused on the neural basis of action mirroring, identifying particular electrophysiological markers or related brain regions. A vivid debate...

Calcium-dependent Action of Osmolality

osmolality is decreased from 1,650 to 305 mosM. Incubation of slices in Ca2+-free media containing 2 mM EGTA largely abolished this action of osmolality on cAMP, whereas exclusion of Mg2+ or K+ from the incubation media was without effect. Addition of Ca21 to Ca2+-deprived inner medulla incubated at 750 mosM (175 mM Na+, 380 mM urea) significantly increased tissue cAMP and media prostaglandin (...

Direct measurement of the increase in intracellular free calcium ion concentration in response to the action of complement.

1. The effect of rabbit anti-(pigeon erythrocyte) antibodies plus human complement on the concentration of intracellular free Ca2+ in sealed pigeon erythrocyte 'ghosts' was investigated with the photoprotein obelin. 2. The addition of human serum, as a source of complement, to 'ghosts' coated with antibody caused a rapid increase in intracellular free Ca2+ after a lag of 20-40 s, as detected by...