• 作者：Zhen Kun Ye ; Lan Ying Li ; Sheng Na Han ; Xiu Ling Nie ; Zhao Zhang ; Ying Jing ; Lai Xiang Lin ; Yi Na Sun ; Yu Qin Yan ; Zu Pei Chen
• 关键词：Acute coronary syndrome ; Th17 ; Regulatory T cells ; Inflammation ; Atherosclerosis
• 刊名：Cell Biology International
• 出版年：2008
• 期刊代码：164_10656995
• 类别：bio
• 出版时间：March 2008
• 卷：32
• 期：3
• 页码：S47
• 文件大小：45 K

In leaves, six isoforms of SOD were recognized. Roots possessed two additional bands, named manganese superoxide dismutase (MnSOD)-like form (MnSODI) and Cu/ZnSOD-like form (Cu/ZnSODIV). The H₂O₂ content in leaves ranged from 554 to 5 098 μmol H₂O₂/g f.w. and was negatively correlated with CAT activity. The non-contaminated population was characterized by the lowest CAT activity combined with the highest H₂O₂ concentration. Two isoforms of CAT, CAT-1 and CAT-2, were recognized in leaves of plants from non-contaminated and contaminated sites, respectively. In roots of individuals from two heaps (‘Warpie’ and ‘Saturn’), two distinct bands for each CAT isoform were observed. A slower migrating band may be an aggregate, exhibiting CAT and MnSODs activities. Both peroxidases (APX and GPX) presented the same pattern of activity, depending on the organ, indicating that in leaves and roots APX and GPX were regulated in parallel.

Differences in enzyme activities and H₂O₂ content between plants from different contaminated sites were statistically significant, but were tightly maintained at a very similar level. Prolonged and permanent heavy metal stress evoked a very similar mode of antioxidative response in specimens of analyzed metalliferous populations not causing measurable oxidative stress. Thus, our results clearly indicate that V. tricolor is a taxon well adapted to heavy metal-contaminated soils, and that differences in enzyme activities and H₂O₂ content result from adjustment of plants to a variety of conditions.