Met-enkephalin-induced release into the blood of a factor causing postural asymmetry |
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Authors: | A G Bakalkin GYa Y" >Kobylyansky,L V Nagornaya,K N Yarygin,M I Titov |
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Affiliation: | 1. Department of Endocrinology, No. 4 Teaching Hospital, China Medical University, Shenyang 110032, China;2. Department of Dermatology, No. 1 Teaching Hospital, China Medical University, Shenyang 110001, China;3. Department of Immunology, School of Basic Medical Science, China Medical University, Shenyang 110122, China |
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Abstract: | Met- and Leu-enkephalin applied subarachnoidally into the rostral portion of a transected spinal cord (at the T6-T7 level) induce postural asymmetry of the hind limbs in rats, Met-enkephalin being predominantly responsible for the flexion of the right, and Leu-enkephalin of the left, hind leg. The blood serum of rats injected with Met-enkephalin contains a factor which, when administered subarachnoidally into the caudal portion of the transected spinal cord, is capable of inducing the hind limb postural asymmetry--predominantly, with the right leg flexion. This factor is inactivated by papain and differs from Met- and Leu-enkephalin in chromatographic properties. Apparently, Met-enkephalin induces the release of a peptide factor into the blood, from the brain or organs innervated by the neurons lying above the cut. It is then carried with the blood to the hind limbs and effects the hind limb postural asymmetry. |
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