TY - JOUR
T1 - Complementation of two related tumour cell classes during experimental metastasis tagged with different histochemical marker genes
AU - Lin, W. C.
AU - O’Connor, K. L.
AU - Culp, L. A.
PY - 1993/5
Y1 - 1993/5
N2 - Intercellular complementation during tumour development and metastasis was analysed for two different oncogene (ras or sis) transformants of Balb/c 3T3 cells, tagged with different histochemical marker genes (lacZ or ALP to generate LZEJ or APSI cells, respectively), by localising them after their co-injection with specific double-staining protocols. This model evaluates whether limited progression of each tumour class can be facilitated reciprocally during co-localisation and co-growth in nude mice by taking advantage of the sensitivity of the histochemical marker genes for localising them. After intravenous co-injection of equal numbers of both cells to analyse experimental metastasis, most foci transiently established in the lung for several hours were comprised of only one cell class. However, a significant fraction of foci contained both cell types, as identified in double-stained whole-lung tissues and in lung sections. Evidence was obtained that LZEJ cells increase the survivability and subsequent growth of APSI-containing micrometastases during co-localisation in lung, when compared to APSI cells injected alone. Conversely, APSI cells facilitate expansion of LZEJ cells from micrometastatic foci into overt-metastatic nodules in the lung. These analyses reveal reciprocity during experimental metastasis by two related tumour cell classes derived from the same parental cell.
AB - Intercellular complementation during tumour development and metastasis was analysed for two different oncogene (ras or sis) transformants of Balb/c 3T3 cells, tagged with different histochemical marker genes (lacZ or ALP to generate LZEJ or APSI cells, respectively), by localising them after their co-injection with specific double-staining protocols. This model evaluates whether limited progression of each tumour class can be facilitated reciprocally during co-localisation and co-growth in nude mice by taking advantage of the sensitivity of the histochemical marker genes for localising them. After intravenous co-injection of equal numbers of both cells to analyse experimental metastasis, most foci transiently established in the lung for several hours were comprised of only one cell class. However, a significant fraction of foci contained both cell types, as identified in double-stained whole-lung tissues and in lung sections. Evidence was obtained that LZEJ cells increase the survivability and subsequent growth of APSI-containing micrometastases during co-localisation in lung, when compared to APSI cells injected alone. Conversely, APSI cells facilitate expansion of LZEJ cells from micrometastatic foci into overt-metastatic nodules in the lung. These analyses reveal reciprocity during experimental metastasis by two related tumour cell classes derived from the same parental cell.
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U2 - 10.1038/bjc.1993.170
DO - 10.1038/bjc.1993.170
M3 - Article
C2 - 8494724
AN - SCOPUS:0027253063
SN - 0007-0920
VL - 67
SP - 910
EP - 921
JO - British Journal of Cancer
JF - British Journal of Cancer
IS - 5
ER -