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G B King

Publications and source records attributed to G B King.

4 recordsLinked to original sources
PubMed1981

GTP-sensitive phosphorylation of proteins in a postmitochondrial supernatant from rat brainstem affected by ACTH1-24.

The effect of ACTH1-24 and cyclic nucleotides on the endogenous phosphorylation of proteins from a postmitochondrial supernatant from rat brainstem was investigated in the presence and absence of GTP. Phosphorylation and its modulation by these compounds were studied in vitro by incorporation of labeled phosphate from [gamma-32P]ATP added to the incubation mixture. Phosphoproteins were subsequently analyzed by autoradiography after one- and two-dimensional separation. Eight ACTH-sensitive phosphoproteins of molecular weights 75 (IEP 4.0), 67, 64, 50 (IEP 4.7), 47 (IEP 4.8), 38, 34, and 24K were found. The effects of ACTH on phosphorylation were mainly inhibitory, and the affected protein bands did not coincide with the phosphoproteins sensitive to cyclic AMP and cyclic GMP. Phosphorylation of those phosphoprotein bands and its ACTH sensitivity appeared to be highly sensitive to GTP. It is suggested that the activity of protein kinases involved in hormone-sensitive phosphorylation in a postmitochondrial rat brainstem fraction is regulated by GTP-dependent mechanisms.

Adrenocorticotropic Hormone↗
PubMedDate not supplied

[The binding of 3H-spiperone to lymphocytes in patients with schizophrenia and first-degree relatives: in search of a genetic marker].

3H-spiperone binding of lymphocytes has been studied and proposed to be a useful vulnerability marker for certain subtypes of schizophrenia. The binding of 3H-spiperone into lymphocytes was studied in 22 schizophrenics, 19 unaffected relatives and 8 healthy subjects. Binding assay was performed, incubating lymphocytes with 0.04 to 0.4 mM of 3H-spiperone. Non-specific binding was measured with 10 mM haloperidol. At the end the lymphocytes were homogenized. The results show a significant (p < 0.01) lower affinity (high Kd values) in drug naive schizophrenics compared with the controls. No differences were found in the binding capacity (Bmax) of both schizophrenic groups compared with control subjects. The results cannot offer us a reliable biological marker for schizophrenia. The increase of the number of subjects is suggested.

Adult↗