IPIMAR - National Institute of Biological Resources, Av. Brasília, 1449-006 Lisbon, Portugal.
Comp Biochem Physiol C Toxicol Pharmacol. 2010 Aug;152(2):139-46. doi: 10.1016/j.cbpc.2010.03.009. Epub 2010 Apr 10.
Metallothionein-like proteins (MT) and V, Cr, Co, Ni, Zn, Cu, As and Cd were determined in digestive gland, gills, kidney and gonads of Octopus vulgaris, from the Portuguese coast. To our knowledge these are the first data on MT in octopus. High concentrations (microgg(-1), dry mass) of Zn (48050) and Cd (555) were found in digestive gland, and MT reached levels one order of magnitude above the ones registered in wild bivalves. Significantly higher levels of MT in digestive gland and gills of specimens from A and B were in line with elevated Cd concentrations. Principal component analyses (PCA) point to MT-Cd and MT-Cr associations in digestive gland and gills. Despite the high levels of Zn in specimens from B, association with Zn was not obtained. Due to the affinity of MT to various elements, it should not be excluded the possibility of Cd replacing Zn in Zn-MT. Kidney presented higher levels of Cd, Co, Ni and As than gills and gonads, and in the case of As surpassing the levels in digestive gland, but PCA showed no relation with MT. Likewise the MT levels in gonads had no correspondence to the metal concentration variation.
金属硫蛋白样蛋白 (MT) 和 V、Cr、Co、Ni、Zn、Cu、As 和 Cd 在葡萄牙沿海地区的普通章鱼的消化腺、鳃、肾脏和性腺中被测定。据我们所知，这是章鱼中 MT 的第一批数据。消化腺中 Zn（48050μg/g，干质量）和 Cd（555μg/g）的浓度非常高，MT 水平比野生双壳类动物中记录的水平高出一个数量级。A 和 B 组样本中消化腺和鳃中的 MT 水平显著较高，与 Cd 浓度升高一致。主成分分析 (PCA) 表明 MT-Cd 和 MT-Cr 在消化腺和鳃中存在关联。尽管 B 组样本中的 Zn 水平较高，但未获得与 Zn 的关联。由于 MT 对各种元素的亲和力，不能排除 Cd 取代 Zn-MT 中的 Zn 的可能性。肾脏中的 Cd、Co、Ni 和 As 水平高于鳃和性腺，而 As 的水平超过了消化腺中的水平，但 PCA 显示与 MT 没有关系。同样，性腺中的 MT 水平与金属浓度的变化没有对应关系。
