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Updated: Jul 10, 2026
11:12
Optimization of a Multiplex RNA-based Expression Assay Using Breast Cancer Archival Material
Published on: August 1, 2018
HYOU1/Orp150 expression in breast cancer
Alexander Stojadinovic1, Jeffrey A Hooke, Craig D Shriver
1Department of Surgery, Surgical Oncology, Walter Reed Army Medical Center, Washington, DC, USA. alexander.stojadinovic@na.amedd.army.mil
Summary
Heat shock protein HYOU1 (Orp150) is overexpressed in invasive breast cancer, correlating with poor prognosis indicators like lymph node involvement. This suggests HYOU1 may play a role in cancer metastasis.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Heat shock protein HYOU1 (Orp150) is implicated in cellular responses to stress and has been observed in various cancers.
- Previous research indicated elevated HYOU1/Orp150 in prostate, bladder, and invasive breast cancer.
- This study investigates HYOU1/Orp150 expression across different breast tissue stages.
Purpose of the Study:
- To evaluate HYOU1/Orp150 expression in benign, pre-malignant, and malignant breast lesions.
- To correlate HYOU1/Orp150 expression levels with clinical and pathological features of breast cancer.
- To explore the potential role of HYOU1/Orp150 in breast cancer progression and metastasis.
Main Methods:
- Immunohistochemistry was performed on 66 paraffin-embedded breast tissue sections using an HYOU1/Orp150 antibody.
- HYOU1/Orp150 staining was scored from 0 (lowest) to 3+ (highest).
- Statistical analysis (ANOVA, Student's t-Test) compared HYOU1/Orp150 expression with clinico-pathological data (P<0.05 significance).
Main Results:
- HYOU1/Orp150 expression significantly increased from benign to ductal carcinoma in situ and invasive carcinoma (P<0.01).
- Expression was reduced in benign tissue adjacent to invasive cancer compared to benign-only lesions (P=0.046).
- Overexpression correlated with lymph node involvement, lymphovascular invasion, and absence of estrogen receptor (P<0.01), with a trend for p53 (P<0.04).
Conclusions:
- HYOU1/Orp150 is overexpressed in invasive breast cancers and linked to indicators of poor prognosis.
- The association with lymphovascular invasion and nodal involvement suggests HYOU1/Orp150 may contribute to breast cancer metastasis.
- Further research into HYOU1/Orp150's role in metastasis is warranted.
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