| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T1 |
0-133 |
Sentence |
denotes |
Deletion of endothelial cell-specific liver kinase B1 increases angiogenesis and tumor growth via vascular endothelial growth factor. |
| T2 |
134-236 |
Sentence |
denotes |
Liver kinase B1 (LKB1) is a serine/threonine protein kinase ubiquitously expressed in mammalian cells. |
| T3 |
237-314 |
Sentence |
denotes |
It was first identified in Peutz-Jeghers syndrome as a tumor suppressor gene. |
| T4 |
315-391 |
Sentence |
denotes |
Whether endothelial LKB1 regulates angiogenesis and tumor growth is unknown. |
| T5 |
392-563 |
Sentence |
denotes |
In this study, we generated endothelial cell-specific LKB1-knockout (LKB1(endo-/-)) mice by crossbreeding vascular endothelial-cadherin-Cre mice with LKB1(flox/flox) mice. |
| T6 |
564-700 |
Sentence |
denotes |
Vascular endothelial growth factor (VEGF) level was highly co-stained in endothelial cells but not in macrophages in LKB1(endo-/-) mice. |
| T7 |
701-825 |
Sentence |
denotes |
Consistently, LKB1(endo-/-) mouse tissues including the lung, skin, kidney and liver showed increased vascular permeability. |
| T8 |
826-1044 |
Sentence |
denotes |
Tumors implanted in LKB1(endo-/-) mice but not macrophage-specific LKB1-knockout mice grew faster and showed enhanced vascular permeability and increased angiogenesis as compared with those implanted in wild-type mice. |
| T9 |
1045-1195 |
Sentence |
denotes |
Injection of VEGF-neutralizing antibody but not the isotype-matched control antibody decreased endothelial-cell angiogenesis and tumor growth in vivo. |
| T10 |
1196-1371 |
Sentence |
denotes |
Furthermore, LKB1 deletion enhanced mouse retinal and cell angiogenesis, and knockdown of VEGF by small-interfering RNA decreased endothelial cell proliferation and migration. |
| T11 |
1372-1505 |
Sentence |
denotes |
Re-expression of LKB1 or knockdown of VEGF receptor 2 decreased the overproliferation and -migration observed in LKB1(endo-/-) cells. |
| T12 |
1506-1689 |
Sentence |
denotes |
Mechanistically, LKB1 could bind to the VEGF transcription factor, specificity protein 1 (Sp1), which then inhibited the binding of Sp1 to the VEGF promoter to reduce VEGF expression. |
| T13 |
1690-1805 |
Sentence |
denotes |
Endothelial LKB1 may regulate endothelial angiogenesis and tumor growth by modulating Sp1-mediated VEGF expression. |