The application of autophagy to thrombus age estimation in murine deep vein thrombosis model.

Abstract:

:We immunohistochemically examined the intrathrombotic dynamics of autophagy during thrombogenesis using murine deep vein thrombosis (DVT) models. To perform the immunohistochemical analyses, we used anti-LC3 antibody and anti-p62 antibody for detecting the intrathrombotic autophagic functions. We estimated dynamics of the intrathrombotic autophagy as LC3+ cell number (×1000, five fields) with the thrombus ages (each group n = 5). The number of LC3+ cells was once decreased at 3 days, and then increased until 10 days. On the contrary, the number of p62+ cells progressively increased until 10 days after the inferior vena cava (IVC) ligation, and then gradually decreased. Especially, in all of thrombus samples with the postligation intervals of 5-10 days, both numbers were larger than 10. Subsequently, we compared the number of LC3+ cells to that of p62+ cells. Although, at 1 day after the IVC ligation, LC3+ cell number significantly exceeded p62+ cell number, the former was significantly or relatively less than the latter at 3 days or more after the IVC ligation. Thus, positive cells of > 10 in both LC3 and p62 indicated the thrombus age of 5-10 days. Upon comparison of immunopositive cells in LC3 and p62, the p62/LC3 ratio was > 1.0 in 29 out of 30 thrombus samples aged 3-21 days, and all of 1-day-old thrombus had the p62/LC3 ratio of < 0.5. Thus, the ratio of > 1.0 and that of < 0.5 could indicate thrombus age of 3 days or more and that of 1 day, respectively. Collectively, our study implied that the detection of autophagy-related molecules such as LC3 and p62 would be useful for the determination of thrombus age.

journal_name

Int J Legal Med

authors

Nosaka M,Ishida Y,Kuninaka Y,Taruya A,Kimura A,Shimada E,Yamamoto H,Michiue T,Furukawa F,Kondo T

doi

10.1007/s00414-019-02168-0

subject

Has Abstract

pub_date

2020-05-01 00:00:00

pages

1061-1066

issue

3

eissn

0937-9827

issn

1437-1596

pii

10.1007/s00414-019-02168-0

journal_volume

134

pub_type

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