TY - JOUR
T1 - Laser capture microdissection and real-time reverse transcriptase/polymerase chain reaction of bronchiolar epithelium after bleomycin
AU - Betsuyaku, T.
AU - Griffin, G. L.
AU - Watson, M. A.
AU - Senior, R. M.
PY - 2001
Y1 - 2001
N2 - Terminal airways are affected in many lung diseases and toxic inhalations. To elucidate the changes in terminal airways in these diverse situations it will be helpful to profile and quantify gene expression in terminal bronchiolar epithelium. We used laser capture microdissection (LCM) to collect terminal bronchiolar epithelial cells from frozen sections of lungs of mice subjected to intratracheal bleomycin. The RNA from these cells was used for analysis of select messenger RNAs (mRNAs) by quantitative real-time polymerase chain reaction (PCR). In parallel, we used real-time PCR to analyze mRNAs in whole-lung homogenates prepared from other mice given intratracheal bleomycin. We found reductions of Clara cell-specific protein and keratinocyte growth factor receptor mRNAs in both terminal bronchiolar epithelium and whole-lung homogenates 7 d after bleomycin. In contrast, terminal bronchiolar epithelial transforming growth factor (TGF)-β mRNA was reduced but whole-lung TGF-β mRNA was not changed, whereas terminal bronchiolar epithelial epidermal growth factor (EGF) receptor mRNA was not changed but whole-lung EGF receptor was reduced. We conclude that LCM can isolate terminal bronchiolar epithelial cells for studies of cell-specific gene expression by quantitative real-time PCR, and that cell-specific gene expression in terminal bronchiolar epithelium is not necessarily reflected in analysis of whole-lung gene expression.
AB - Terminal airways are affected in many lung diseases and toxic inhalations. To elucidate the changes in terminal airways in these diverse situations it will be helpful to profile and quantify gene expression in terminal bronchiolar epithelium. We used laser capture microdissection (LCM) to collect terminal bronchiolar epithelial cells from frozen sections of lungs of mice subjected to intratracheal bleomycin. The RNA from these cells was used for analysis of select messenger RNAs (mRNAs) by quantitative real-time polymerase chain reaction (PCR). In parallel, we used real-time PCR to analyze mRNAs in whole-lung homogenates prepared from other mice given intratracheal bleomycin. We found reductions of Clara cell-specific protein and keratinocyte growth factor receptor mRNAs in both terminal bronchiolar epithelium and whole-lung homogenates 7 d after bleomycin. In contrast, terminal bronchiolar epithelial transforming growth factor (TGF)-β mRNA was reduced but whole-lung TGF-β mRNA was not changed, whereas terminal bronchiolar epithelial epidermal growth factor (EGF) receptor mRNA was not changed but whole-lung EGF receptor was reduced. We conclude that LCM can isolate terminal bronchiolar epithelial cells for studies of cell-specific gene expression by quantitative real-time PCR, and that cell-specific gene expression in terminal bronchiolar epithelium is not necessarily reflected in analysis of whole-lung gene expression.
UR - http://www.scopus.com/inward/record.url?scp=0034802472&partnerID=8YFLogxK
U2 - 10.1165/ajrcmb.25.3.4466
DO - 10.1165/ajrcmb.25.3.4466
M3 - Article
C2 - 11588004
AN - SCOPUS:0034802472
SN - 1044-1549
VL - 25
SP - 278
EP - 284
JO - American Journal of Respiratory Cell and Molecular Biology
JF - American Journal of Respiratory Cell and Molecular Biology
IS - 3
ER -