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c-myc expression in the thyroid. I: Normal, adenomatous, and cancerous thyroid tissue
K D Burman1, Y Y Djuh, R V LaRocca
1Department of Medicine, Walter Reed Army Medical Center, Washington, DC.
Hormone and Metabolic Research. Supplement Series
|January 1, 1987
Summary
Cellular (c)-myc oncogene expression is similar in normal thyroid cells, thyroid adenomas, and thyroid cancer. This suggests c-myc plays a role in both normal and cancerous thyroid cell growth.
Area of Science:
- Oncology
- Molecular Biology
- Endocrinology
Background:
- The role of the myc oncogene in thyroid tumor development and progression is under investigation.
- Understanding oncogene expression in thyroid neoplasms is crucial for targeted therapies.
Purpose of the Study:
- To quantify cellular (c)-myc expression in normal thyrocytes, thyroid adenomas, and thyroid cancer.
- To compare c-myc expression levels across these different thyroid tissue types.
Main Methods:
- Total RNA extraction from thyroid tissue samples (adenomas, cancer, normal).
- Northern blot analysis to detect and quantify the 2.4 Kb c-myc messenger RNA (mRNA).
- Hybridization with a 32P-labelled c-myc DNA probe, followed by autoradiography and densitometry.
Main Results:
- Normal thyrocytes consistently expressed the 2.4 Kb c-myc message.
- Thyroid adenoma tissue showed c-myc expression levels comparable to surrounding normal tissue.
- Thyroid cancer tissue also exhibited c-myc expression levels similar to normal thyrocytes.
Conclusions:
- Cellular (c)-myc oncogene expression is comparable across normal thyrocytes, thyroid adenomas, and thyroid cancer.
- These findings indicate that c-myc may be involved in the growth regulation of both normal and neoplastic thyroid cells.
- The study supports a potential role for c-myc in the broader context of thyroid cell proliferation.