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    Inhibition of miR-155 reduces impaired autophagy and improves prognosis in an experimental pancreatitis mouse model
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    Abstract:
    Abstract Acute pancreatitis (AP) is a common digestive disease characterized by inflammation of the pancreas. MiR-155 plays a role in promoting inflammation and inhibiting the activation of anti-inflammatory pathways. Impaired autophagy could promote zymogen activation, abnormal acinar cell secretion, cell death, and the inflammatory response to aggravate AP. The aim of this study was to ascertain the effect of silencing miR-155 on AP through its effects on inflammation and impaired autophagy in vivo. In this study, AAV(adeno-associated virus)-mediated miR-155 and miR-155 sponge were injected through the tail vein of mice. After 3 weeks, AP was induced by intraperitoneal (IP) injections of cerulein. Pancreatic and pulmonary tissues were analyzed after 24 h. Silencing of miR-155 ameliorated pancreas and lung damage in three AP models of mice by preventing accumulation of autophagosomes that are unable to fuse with lysosomes and decreasing pancreatic inflammation by targeting TAB2. 3-MA could reduce the aberrant accumulation of autophagosomes, which alleviates the pancreas damage that was aggravated by increasing miR-155 levels. These findings demonstrate that the inhibition of miR-155 holds promise for limiting pancreatitis.
    Keywords:
    Acinar cell
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    BAG3
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    Autophagy is a highly conserved cell degradation process which can decompose the organelles and recycling the macromolecules by lysosomes. Autophagy is induced by multiple factors, such as starvation, ischemia, and oxidative stress, and plays a key role in development and differentiation of cells. It has been shown that autophagy is closely related to cardiovascular diseases. Moderate autophagy protects myocardial cells from injury, whereas insufficient or excessive autophagy triggers or aggravates diseases. The present article reviews the progress of autophagy in cardiovascular diseases.
    Organelle
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    Citations (1)
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    Acinar cell
    Pathogenesis
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    ULK1
    Autophagosome
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