[Effect of bombesin, its various fragments and their analogs on thermoregulation in rabbits].

Out of synthetic tetradecapeptide bombesin, its fragments C-terminal nonapeptide and N-terminal pentapeptide and their analogues ( Val7 , D- Ala11 ), ( Ala7 , D- Ala11 ), (Leu7, D- Ala11 ) and ( Pro6 , Gly7 , D- Ala11 ), the first two, being injected into the lateral ventricle of the brain in rabbits, affected the body temperature in cold environment (+ 10 degrees C). The analogues exerted a lesser effect on the body temperature. N-terminal pentapeptide was ineffective both in cold (+ 10 degrees C) and warm (+ 30 degrees C) environment.