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. 2001 Oct;7(5):630-6.
doi: 10.3748/wjg.v7.i5.630.

Establishment of cell clones with different metastatic potential from the metastatic hepatocellular carcinoma cell line MHCC97

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Establishment of cell clones with different metastatic potential from the metastatic hepatocellular carcinoma cell line MHCC97

Y Li et al. World J Gastroenterol. 2001 Oct.

Abstract

Aim: To establish clone cells with different metastatic potential for the study of metastasis-related mechanisms.

Methods: Cloning procedure was performed on parental hepatocellular carcinoma (HCC) cell line MHCC97, and biological characteristics of the target clones selected by in vivo screening were studied.

Results: Two clones with high (MHCC97-H) and low (MHCC97-L) metastatic potential were isolated from the parent cell line. Compared with MHCC97-L, MHCC97-H had smaller cell size (average cell diameter 43 microm vs 50 microm) and faster in vitro and in vivo growth rate (tumor cell doubling time was 34.2h vs 60.0h). The main ranges of chromosomes were 55-58 in MHCC97-H and 57-62 in MHCC97-L. Boyden chamber in vitro invasion assay demonstrated that the number of penetrating cells through the artificial basement membrane was (37.5 +/- 11.0) cells/field for MHCC97-H vs (17.7 +/- 6.3)/field for MHCC97-L. The proportions of cells in G0-G1 phase, S phase, and G2-M phase for MHCC97-H/MHCC97-L were 0.56/0.65, 0.28/0.25 and 0.16/0.10, respectively, as measured by flow cytometry. The serum AFP levels in nude mice 5wk after orthotopic implantation of tumor tissue were (246 +/- 66) microg.L(-1) for MHCC97-H and (91 +/- 66) microg.L(-1) for MHCC97-L. The pulmonary metastatic rate was 100% (10/10) vs 40% (4/10).

Conclusion: Two clones of the same genetic background but with different biological behaviors were established, which could be valuable models for investigation on HCC metastasis.

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Figures

Figure 1
Figure 1
Subcutaneous tumor formation of the two clones. Thirty days after sc injection of 5 × 106 tumor cells for each nude mouse, the average s.c tumor diameter was (1.94 ± 0.36) cm for MHCC97-H as against (0.84 ± 0.47) cm for MHCC97-L.
Figure 2
Figure 2
The liver tumor size of the two clones 5 wk after orthotopic inoculation. The tumor geometric mean diameter (GMD) for MHCC97-H was (1.42 ± 0.11) cm as against (0.90 ± 0.26) cm for MHCC97-L.
Figure 3
Figure 3
Photomicroscopy of lung metastases of the two clones. MHCC97-H (3A) produced large metastatic lesion pressing the bronchioles while MHCC97-L (3B) only formed small metastasis. HE × 100.
Figure 4
Figure 4
Photomicroscopy of MHCC97-L (4A) and MHCC97-H (4B) illustrating the clear differences in the number of nucleoli. Giemsa × 400.
Figure 5
Figure 5
Cell growth curve of two clones. 4 × 104 viable cells were cultured in each well of the 24 well culture plate. Cell numbers were determined for 7 consecutive days. Each time point represents the mean of duplicate cell counts.

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