Liquid biopsy of PIK3CA mutations in cervical cancer in Hong Kong Chinese women

Tony K.H. Chung, Tak Hong Cheung, So Fan Yim, Mei Yun Yu, Rossa W.K. Chiu, Keith W.K. Lo, Ida P.C. Lee, Raymond R.Y. Wong, Kitty K.M. Lau, Vivian W. Wang, Michael J. Worley, Kevin M. Elias, Stephen J. Fiascone, David I. Smith, Ross S. Berkowitz, Yick Fu Wong

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Introduction Cervical cancer is the fourth most common female cancer worldwide. The prognosis for women with advanced-stage or recurrent cervical cancer remains poor and response to treatment is variable. Standardized management protocols leave little room for individualization. We report on a novel blood-based liquid biopsy for specific PIK3CA mutations as a clinically useful biomarker in patients with invasive cervical cancer. Methods One hundred seventeen Hong Kong Chinese women with primary invasive cervical cancer and their pre-treatment plasma samples were investigated. Two PIK3CA mutations, p.E542K and p.E545K were measured in cell free DNA (cfDNA) extracted from plasma using droplet digital PCR. This liquid biopsy of PIK3CA in cervical cancer was correlated to clinico-pathological features to verify the potential of PIK3CA as a clinically useful molecular biomarker for predicting disease prognosis and monitoring for progression. Results PIK3CA mutations, either p.E542K or p.E545K, were detected in plasma cfDNA from 22.2% of the patients. PIK3CA mutation status was significantly correlated to median tumor size (p < 0.01). PIK3CA mutations detected in the plasma were significantly associated with decreased disease-free survival and overall survival (p < 0.05). Conclusions As a liquid molecular biopsy, analysis of circulating PIK3CA mutations shows promise as a way to refine risk stratification of individual patients with cervical cancer, and provides a platform for further research to offer individualized therapy with the purpose of improving outcomes.

Original languageEnglish (US)
Pages (from-to)334-339
Number of pages6
JournalGynecologic oncology
Issue number2
StatePublished - Aug 2017

ASJC Scopus subject areas

  • Oncology
  • Obstetrics and Gynecology


Dive into the research topics of 'Liquid biopsy of PIK3CA mutations in cervical cancer in Hong Kong Chinese women'. Together they form a unique fingerprint.

Cite this