Interaction of SDF-1alpha and CXCR4 plays an important role in pulmonary cellular infiltration in differentiation syndrome.
This study aims to investigate the role of stromal cell-derived factor 1alpha (SDF-1alpha) and its receptor CXCR4 in cellular infiltration of the lung in differentiation syndrome (DS). The acute promyelocytic leukemia (APL) NB4 cells and freshly prepared APL cells from the patients were differentiated by all-trans retinoic acid (ATRA). The expression of SDF-1alpha in human lung tissues was examined by RT-PCR and Western blot analysis. The cells were subjected to adhesion, migration or invasion assays, and co-cultured with human lung tissues in a microgravity rotary cell culture system to examine cellular infiltration in situ. ATRA-differentiated cells expressed high levels of CXCR4, and adhered more strongly to matrigel. Their ability to migrate and invade was enhanced by SDF-1alpha and lung homogenate, and diminished by pre-treatment with an anti-CXCR4 blocking antibody. SDF-1alpha was expressed in the lung tissues of all seven human donors. ATRA-differentiated NB4 cells infiltrated into lung tissues, and this was reduced by pre-treatment with an anti-CXCR4 blocking antibody. The interaction of SDF-1alpha and CXCR4 plays an important role in pulmonary cellular infiltration during DS, suggesting that targeting SDF-1alpha and CXCR4 may provide the basis for potential treatments in the management of DS.
Zhou
Jin
J
Department of Hematology, The First Affiliated Hospital of Harbin Medical University, Harbin, China. kevsun88@hotmail.com
Hu
Longhu
L
Cui
Zhe
Z
Jiang
Xian
X
Wang
Guifang
G
Krissansen
Geoffrey W
GW
Sun
Xueying
X
D000293:Adolescent; D000328:Adult; D000368:Aged; D000906:Antibodies / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects; D002448:Cell Adhesion / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D054377:Chemokine CXCL12 / Q000235:genetics / Q000378:metabolism*; D002648:Child; D003470:Culture Media / Q000494:pharmacology; D005260:Female; D006801:Humans; D015473:Leukemia, Promyelocytic, Acute / Q000188:drug therapy / Q000473:pathology / Q000503:physiopathology; D017254:Leukemic Infiltration; D008168:Lung / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D019718:Receptors, CXCR4 / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D014212:Tretinoin / Q000494:pharmacology*; D055815:Young Adult
D000906:Antibodies; D000970:Antineoplastic Agents; C527276:CXCR4 protein, human; D054377:Chemokine CXCL12; D003470:Culture Media; D019718:Receptors, CXCR4; D014212:Tretinoin