Osteopontin in Metastatic Breast Cancer Patients

Study Overview
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Brief Summary
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OPN plays an important role in various aspects of malignancy, particularly those involved in tissue invasion and metastasis, and OPN levels have been associated with aggressive¬ness in several cancer types, including breast cancer. Tumor response to treatment is a predictor of prognosis and overall survival for cancer patient population the investigators assigned osteopontin as potential contributors in breast cancer.

Detailed Description
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Analysis of polymorphisms in the OPN regulatory region: The PCR amplification of the promoter regulatory region from the extracted DNA by using the following primers -3 (forward primer 5 -CAA GCT ACT GCA TAC TCG AAA TCA CA-3 ; reverse primer 5 - ACA ACC AAG CCC TCC CAG AAT TTA-3 ). PCR was performed using 50 ng DNA as a template under the following conditions: 95°C for 10 min, then 36 cycles of 94°C for 30 s, an annealing temperature for 60 s, and 72°C for 60 s, with a final extension at 72°C for 15 min. After affinity membrane purification using the QIAquick Gel Extraction kit (Qiagen, Carlsbad, CA, USA), the PCR products were subjected to cycle sequencing with the respective forward and reverse primer using an automated ABI 310 DNA sequencer. Measurement of serum level of osteopontin: OPN level were measured using Enzyme linked immnosorbent (ELISA) Kit supplied by IBL (Immuno-Biological laboratories Co. Ltd., Japan). 30 normal females were conducted with matched age with a median osteopontine serum level of 15 so, this level was assigned as a cut off value. Pretreatment serum level and polymorphism of oteopontine was correlated with different clinicopathological criteria of the patients, response to the treatment, PFS and OS.

Official Title
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Osteopontin Level and Promoter Polymorphism in Egyptian Metastatic Breast Cancer Patients

Conditions
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Survival, Prosthesis

Intervention / Treatment
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* Diagnostic Test: Osteopontin


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: de novo metastatic breast cancer patients recruited from Oncology center Mansoura University and clinical oncology department, Mansoura University Hospital All included patients were presented with disseminated visceral +/- bone metastasis (visceral crisis) Exclusion Criteria: brain metastasis was excluded

Ages Eligible for Study
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Minimum Age: 31 Years
Maximum Age: 74 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| patients<br>metatstatic breast | Diagnostic Test: Osteopontin<br>* Serum osteopontin (OPN) was measured by ELIZA and osteopontin gene mutation was analyzed by sequencing and correlated with clinicopathological criteria, response, PFS and OS.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Both pretreatment serum level of oteopontin and gene mutation were correlated with different clinicopathological criteria of the patients, response to the treatment, PFS and OS. | Serum osteopontin (OPN) was measured by ELIZA and osteopontin gene mutation was analyzed by sequencing and correlated with clinicopathological criteria, response, PFS and OS. | 2 years |