Polyamines and enzymes of polyamines metabolism in the cartilage during embryonic development.
1. In chicken embryo cartilage putrescine levels, maximal at day 8, fall by day 16 to a four-fold lower value, which remains unchanged through hatching and in the 12-day-old chick. 2. Spermine and spermidine, initially higher than putrescine, are almost halved between days 8 and 11, and remain constant afterwards. 3. Ornithine decarboxylase is down to 20% of the day 8 value by day 16, and is further reduced in the newly hatched chick. 4. S-Adenosyl-methionine decarboxylase activity shows a 50% reduction between days 8 and 11, and no further changes. 5. Spermidine acetyltransferase activity at day 11 is 30% lower than at day 8, goes back up to the initial level by day 16, and progressively decreases through hatching and the first 12 days of life.
Bargoni
N
N
Dipartimento di Medicina e Oncologia Sperimentale, Universitá di Torino, Italy.
Tazartes
O
O
D000123:Acetyltransferases / Q000378:metabolism*; D012437:Adenosylmethionine Decarboxylase / Q000378:metabolism*; D000818:Animals; D002262:Carboxy-Lyases / Q000378:metabolism*; D002356:Cartilage / Q000196:embryology* / Q000378:metabolism; D002642:Chick Embryo; D005314:Embryonic and Fetal Development; D009955:Ornithine Decarboxylase / Q000378:metabolism*; D011073:Polyamines / Q000378:metabolism*; D000099228:Diamine N-Acetyltransferase
D000123:Acetyltransferases; D012437:Adenosylmethionine Decarboxylase; D002262:Carboxy-Lyases; D009955:Ornithine Decarboxylase; D011073:Polyamines; D000099228:Diamine N-Acetyltransferase