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DNA clonal heterogeneity of hepatocellular carcinoma demonstrated by Feulgen-DNA analysis
1Department of Clinical Pathology, College of Medicine, National Taiwan University, Taipei, Republic of China.
Insights
Hepatocellular carcinoma (HCC) DNA clonal heterogeneity was studied. Most HCCs appear to originate from a single cell clone, with heterogeneity found in only 19% of cases.
Area of Science:
- Oncology
- Genetics
- Pathology
Background:
- Hepatocellular carcinoma (HCC) is a significant global health concern.
- Understanding the clonal evolution of HCC is crucial for effective treatment strategies.
Purpose of the Study:
- To investigate the DNA clonal heterogeneity of hepatocellular carcinomas (HCC).
- To compare DNA content patterns between primary HCCs and their recurrent or metastatic lesions.
Main Methods:
- Analysis of DNA histographic patterns in 36 HCC patients.
- Utilized modified Feulgen staining and scanning microdensitometry.
- Examined paired samples from primary tumors, recurrent lesions, and metastases.
Main Results:
- DNA distribution patterns were similar within primary HCCs in 88% of cases.
- Similar DNA histograms were observed between primary and secondary lesions in most instances.
- Significant DNA clonal heterogeneity was identified in 19% (7/36) of HCC cases.
Conclusions:
- Most hepatocellular carcinomas likely arise from a single cell clone.
- While heterogeneity exists, the majority of HCCs show clonal consistency.
- Further research into the mechanisms of HCC clonal evolution is warranted.
Abstract:
To demonstrate DNA clonal heterogeneity of hepatocellular carcinomas (HCC), the DNA histographic pattern of both primary HCCs and their recurrent or metastatic lesions were studied among 36 patients (33 men and 3 women). Thirty-six paired aspirations or imprints taken from primary, recurrent or metastatic lesions were stained, using the modified Feulgen method, and the DNA content was measured with a scanning microdensitometer at a wavelength of 550 nm. Paired aspirations or imprints taken from different parts of the same HCC were examined in 17 cases; the DNA distribution patterns were similar in 15 (88%) and differed in only two (12%). A similar DNA histogram was also shown among different tumors in 10 (71%) of 14 patients with multiple HCCs, with a DNA ploidy discrepancy in only four (29%). Two of two subcutaneous metastases and two of three recurrent tumors showed DNA distribution patterns similar to those in their primary HCCs. In summary, a DNA clonal heterogeneity of HCC was found in 19% (7/36). In contrast, the similar DNA histographic patterns found in most instances among different parts of the HCC and between the primary and recurrent or metastatic lesions suggest that HCC may derive from a single cell clone in the majority of cases.