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Published on: January 14, 2013
Metabolic profiling reveals distinct metabolic alterations in different subtypes of pituitary adenomas and confers
Jie Feng1, Hua Gao1, Qi Zhang2,3
1Beijing Neurosurgical Institute, Capital Medical University, Beijing, 100050, China.
Background:
Pituitary adenomas are common brain tumors. Although transsphenoidal surgery are able to achieve extensive tumor removal, the rate of recurrence ranges from 5 to 20% depending on the different subtype. Further understanding of these tumors is needed to develop novel strategies to improve the prognosis of patients. But their metabolic characteristics are largely unknown.
Methods:
We used metabolomic, transcriptomic, and proteomic approaches to systematically investigate eight subtypes of pituitary adenomas and normal pituitary glands. By blocking IDH2, we investigate IDH2 play an inhibitory role in GH tumor cell growth and tumor secretion.
Results:
We found that all of the pituitary adenomas displayed downregulated glucose metabolism and glycolysis compared to normal tissues. Together with the differences in amino acids and fatty acids, we categorized these tumors into three clusters. We then re-established the reprogrammed metabolic flux in pituitary adenomas based on multiomic analyses. Take growth hormone-secreting pituitary adenomas as an example, we revealed that IDH2 is a key player in the reprogrammed metabolism of such tumors. By blocking IDH2, we confirmed that IDH2 is a potential target for the inhibition of tumor cell growth and tumor secretion.
Conclusions:
Our study first uncovered the metabolic landscape of pituitary adenomas and demonstrated a possible way to inhibit tumor growth by regulating aberrant metabolism.
Insights
Pituitary adenomas exhibit altered metabolism, with downregulated glucose metabolism observed across subtypes. Targeting IDH2 shows potential for inhibiting growth hormone-secreting tumor cell proliferation and secretion.
Area of Science:
- Endocrinology
- Oncology
- Metabolomics
Background:
- Pituitary adenomas are common brain tumors with recurrence rates of 5-20% post-surgery.
- Understanding their metabolic characteristics is crucial for developing new treatment strategies.
- Current knowledge of pituitary adenoma metabolism is limited.
Purpose of the Study:
- To systematically investigate the metabolic landscape of pituitary adenomas using multiomic approaches.
- To identify key metabolic pathways and potential therapeutic targets in different pituitary adenoma subtypes.
- To explore the role of IDH2 in growth hormone-secreting pituitary adenomas.
Main Methods:
- Utilized metabolomic, transcriptomic, and proteomic analyses on eight pituitary adenoma subtypes and normal pituitary tissues.
- Categorized tumors into three clusters based on metabolic differences (glucose, amino acids, fatty acids).
- Investigated the role of IDH2 by blocking its activity in growth hormone-secreting tumor models.
Main Results:
- All pituitary adenomas showed downregulated glucose metabolism and glycolysis compared to normal tissues.
- Multiomic analyses revealed reprogrammed metabolic flux in pituitary adenomas.
- IDH2 was identified as a key player in the metabolism of growth hormone-secreting adenomas, and its inhibition reduced tumor cell growth and secretion.
Conclusions:
- This study provides the first comprehensive metabolic profile of pituitary adenomas.
- Aberrant metabolism in pituitary adenomas presents a potential target for therapeutic intervention.
- Targeting IDH2 demonstrates a promising strategy for inhibiting pituitary adenoma growth and secretion.
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