Involvement of CXCL14 in osteolytic bone metastasis from lung cancer

To investigate the molecular mechanisms of lung cancer-induced bone metastasis, we established a bone-seeking subclone (HARA-B4) from a human squamous lung cancer cell line (HARA) using an in vivo selection method. We compared comprehensive gene expression profiles between HARA and HARA-B4, and iden...

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Veröffentlicht in:International journal of oncology 2014-04, Vol.44 (4), p.1316-1324
Hauptverfasser: TAKIGUCHI, SOICHI, KORENAGA, NATSUKI, INOUE, KAZUKO, SUGI, ERIKA, KATAOKA, YASUFUMI, MATSUSUE, KIMIHIKO, FUTAGAMI, KOUJIRO, LI, YIN-JI, KUKITA, TOSHIO, TERAMOTO, NORIHIRO, IGUCHI, HARUO
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container_issue 4
container_start_page 1316
container_title International journal of oncology
container_volume 44
creator TAKIGUCHI, SOICHI
KORENAGA, NATSUKI
INOUE, KAZUKO
SUGI, ERIKA
KATAOKA, YASUFUMI
MATSUSUE, KIMIHIKO
FUTAGAMI, KOUJIRO
LI, YIN-JI
KUKITA, TOSHIO
TERAMOTO, NORIHIRO
IGUCHI, HARUO
description To investigate the molecular mechanisms of lung cancer-induced bone metastasis, we established a bone-seeking subclone (HARA-B4) from a human squamous lung cancer cell line (HARA) using an in vivo selection method. We compared comprehensive gene expression profiles between HARA and HARA-B4, and identified the critical factors for the formation of bone metastasis using in vitro and in vivo assays. The number of bone metastatic colonies in the hind legs was significantly higher in HARA-B4-inoculated mice than in HARA-inoculated mice at 4 weeks after inoculation. In addition, visceral (adrenal) metastases were not found in HARA-B4-inoculated mice at autopsy, suggesting an increase in cancer cell tropism to bone in HARA-B4. Based on a comprehensive gene expression analysis, the expression level of CXC chemokine ligand 14 (CXCL14) was 5-fold greater in HARA-B4 than in HARA. Results of a soft agar colony formation assay showed that anchorage-independent growth ability was 4.5-fold higher with HARA-B4 than with HARA. The murine pre-osteoblast cell line MC3T3-E1 and the preosteoclast/macrophage cell line RAW264.7 migrated faster toward cultured HARA-B4 cells than toward HARA cells in a transwell cell migration assay. Interestingly, CXCL14 was shown to be involved in all events (enhancement of cancer cell tropism to the bone, anchorage-independent growth and/or recruitment of bone marrow cells) based on siRNA experiments in HARA-B4 cells. Furthermore, in clinical specimens of lung cancer-induced bone metastasis, expression of CXCL14 was observed in the tumor cells infiltrated in bone marrow in all specimens examined. CXCL14 was able to promote bone metastasis through enhancement of cancer cell tropism to the bone and/or recruitment of bone marrow cells around meta-static cancer cells.
doi_str_mv 10.3892/ijo.2014.2293
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We compared comprehensive gene expression profiles between HARA and HARA-B4, and identified the critical factors for the formation of bone metastasis using in vitro and in vivo assays. The number of bone metastatic colonies in the hind legs was significantly higher in HARA-B4-inoculated mice than in HARA-inoculated mice at 4 weeks after inoculation. In addition, visceral (adrenal) metastases were not found in HARA-B4-inoculated mice at autopsy, suggesting an increase in cancer cell tropism to bone in HARA-B4. Based on a comprehensive gene expression analysis, the expression level of CXC chemokine ligand 14 (CXCL14) was 5-fold greater in HARA-B4 than in HARA. Results of a soft agar colony formation assay showed that anchorage-independent growth ability was 4.5-fold higher with HARA-B4 than with HARA. The murine pre-osteoblast cell line MC3T3-E1 and the preosteoclast/macrophage cell line RAW264.7 migrated faster toward cultured HARA-B4 cells than toward HARA cells in a transwell cell migration assay. Interestingly, CXCL14 was shown to be involved in all events (enhancement of cancer cell tropism to the bone, anchorage-independent growth and/or recruitment of bone marrow cells) based on siRNA experiments in HARA-B4 cells. Furthermore, in clinical specimens of lung cancer-induced bone metastasis, expression of CXCL14 was observed in the tumor cells infiltrated in bone marrow in all specimens examined. 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The murine pre-osteoblast cell line MC3T3-E1 and the preosteoclast/macrophage cell line RAW264.7 migrated faster toward cultured HARA-B4 cells than toward HARA cells in a transwell cell migration assay. Interestingly, CXCL14 was shown to be involved in all events (enhancement of cancer cell tropism to the bone, anchorage-independent growth and/or recruitment of bone marrow cells) based on siRNA experiments in HARA-B4 cells. Furthermore, in clinical specimens of lung cancer-induced bone metastasis, expression of CXCL14 was observed in the tumor cells infiltrated in bone marrow in all specimens examined. 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subjects Adrenal glands
anchorage-independent growth
Animals
Bone cancer
Bone marrow
bone metastasis
Bone Neoplasms - pathology
Bone Neoplasms - secondary
Cell growth
Cell Line, Tumor
Cell Movement
Chemokines
Chemokines, CXC - biosynthesis
Chemokines, CXC - genetics
chemotaxis
Complications and side effects
CXCL14
Cytokines
Development and progression
Gene expression
Health aspects
Humans
Ligands
Lung cancer
Lung Neoplasms - etiology
Lung Neoplasms - pathology
Macrophages - metabolism
Male
Metastasis
Mice
Osteoblasts - metabolism
Osteoblasts - pathology
Osteoclasts - pathology
Osteolysis - complications
Osteolysis - pathology
Penicillin
Population
Rats
Rats, Sprague-Dawley
Risk factors
RNA Interference
RNA, Small Interfering
title Involvement of CXCL14 in osteolytic bone metastasis from lung cancer
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