人類微小病毒B19殼體蛋白獨立區域對Balb/c小鼠心臟影響之研究

人類微小病毒B19 (B19V)已被證明與心臟疾病，如心肌炎、心包炎等相關。先前研究已發現將B19V-VP1u蛋白質免疫注射至Balb/c小鼠會造成心臟損傷，因此本研究將進一步探討B19-VP1u不同片段蛋白質對於Balb/c小鼠心臟之影響。結果發現相較於正常Balb/c小鼠對照組，B19V-VP1u蛋白則不僅會促進Balb/c小鼠左心室心臟基質金屬蛋白酶MMP9活性及MMP9蛋白質和發炎相關因子IL-1b及IL-6蛋白質的表現，並且透過MAPK 及 NF-kB 蛋白質訊息傳遞路徑。另外，心肌肥大蛋白與心肌梗塞蛋白表現也有顯著增加。在B19V-VP1u片段對Balb/c小鼠心臟之影響中結果發現以VP1u-A片段病毒蛋白影響最顯著，不僅會促進小鼠心臟MMP9和IL-6蛋白質表現，並且透過磷酸化P38 MAPK訊息傳遞路徑。另外也促進心肌肥大蛋白和心肌梗塞蛋白的表現。而在病理組織切片中也發現有免疫細胞浸潤的情形。

Human parvovirus B19 (B19V) has been shown to be associated with heart diseases such as myocarditis and pericarditis. Previous studies have found that immunization of B19V-VP1u protein into Balb/c mice causes heart damage, so this study will further explore the B19V protein and analyze the different fragments of B19-VP1u protein on the heart of Balb/c mice. The B19V-VP1u protein not only promoted the activity of matrix metalloproteinase MMP9 and the expression of MMP9 protein and inflammation-related proteins IL-1β and IL-6 in the left ventricle of Balb/c mice, but also through the MAPK and NFκB protein signaling pathways. In addition, the performance of cardiac hypertrophic protein and myocardial infarction protein also increased significantly. The effect of the B19V-VP1u fragment on the heart of Balb/c mice was further analyzed. It was found that the most significant effect of VP1u-A virus protein was not only promoted the expression of MMP9 and IL-6 protein in mouse heart, but also through the phosphorylation of P38 MAPK message delivery pathway. It also promotes the expression of cardiac hypertrophic protein and myocardial infarction protein. In pathological tissue sections, B19V-VP1u and VP1u-A viral proteins were found to cause immune cell infiltration in the heart of Balb/c mice.