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Chromosome 1 abnormalities in cervical carcinoma.
C Sreekantaiah1, M K Bhargava, N J Shetty
1Department of Pathology, Kidwai Memorial Institute of Oncology, Bangalore, India.
Cancer
|October 1, 1988
Summary
Chromosome 1 abnormalities are frequent in cervical cancer, found in 95% of patients. These changes, often involving specific regions, may indicate early events in cancer development.
Area of Science:
- Cytogenetics
- Oncology
- Cancer Research
Background:
- Abnormalities of chromosome 1 are frequently observed in various solid tumors and hematologic malignancies.
- Chromosome 1 aberrations are implicated as common events in neoplasia.
Purpose of the Study:
- To investigate the frequency and nature of chromosome 1 aberrations in cervical cancer.
- To determine if chromosome 1 rearrangements are early or late events in cervical carcinogenesis.
Main Methods:
- G-banding analysis was performed on direct preparations of tumor material from 148 patients with invasive cervical carcinoma and 2 cases of carcinoma in situ (CIS).
- Karyotypic changes, including numerical and structural rearrangements of chromosome 1, were systematically analyzed.
Main Results:
- Chromosome 1 abnormalities were detected in 95% of cervical cancer patients, making them one of the most common karyotypic changes.
- Numerical rearrangements (54%) and structural changes, including deletions, isochromosomes, and translocations, were prevalent.
- Specific regions (1p11-p13 and 1q21-q32) and breakpoints (1q32) were nonrandomly affected, suggesting specific roles in tumorigenesis.
Conclusions:
- Abnormalities of chromosome 1 are a hallmark of cervical cancer, consistently occurring with other chromosomal aberrations.
- The presence of these aberrations in early-stage CIS suggests they may represent early cytogenetic events in cervical cancer development, rather than solely secondary changes.