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World Journal of Surgical Oncology

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Open Access 01-12-2006 | Research

Relationship of hypoxia-inducible factor 1α and p21^WAF1/CIP1 expression to cell apoptosis and clinical outcome in patients with gastric cancer

Authors: Ken Mizokami, Yoshihiro Kakeji, Shinya Oda, Yoshihiko Maehara

Published in: World Journal of Surgical Oncology | Issue 1/2006

Abstract

Background

Hypoxia-inducible factor-1α (HIF-1α) plays an essential role in oxygen homeostasis. The expression of HIF-1α-inducible genes is associated with tumor progression. p21 mediates cell cycle arrest and is one of the downstream genes targeted by HIF-1.

Patients and methods

We examined the relationship between HIF-1α and p21 expression, apoptosis and tumor progression using tissue specimens obtained surgically from 126 patients with gastric cancer.

Results

Immunohistochemical analysis indicated that loss of p21 expression correlated positively with patient age and tumor size. Lymph node metastasis was significantly more frequent in tumors with loss of p21 expression (P = 0.022). HIF-1α-positive/p21-negative tumors had a lower apoptotic index than any other tumor samples, and patients with HIF-1α-positive/p21-negative tumors also had a significantly poorer prognosis than the other patient populations.

Conclusion

These results suggest that loss of HIF-1α-dependent p21 expression results in decreased apoptosis, increased cell survival and more aggressive tumors.

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Title: Relationship of hypoxia-inducible factor 1α and p21WAF1/CIP1 expression to cell apoptosis and clinical outcome in patients with gastric cancer
Authors: Ken Mizokami
Yoshihiro Kakeji
Shinya Oda
Yoshihiko Maehara
Publication date: 01-12-2006
Publisher: BioMed Central
Published in: World Journal of Surgical Oncology / Issue 1/2006
Electronic ISSN: 1477-7819
DOI: https://doi.org/10.1186/1477-7819-4-94

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Relationship of hypoxia-inducible factor 1α and p21^WAF1/CIP1 expression to cell apoptosis and clinical outcome in patients with gastric cancer

Abstract

Background

Patients and methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Patients and methods

Results

Conclusion

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