Ultrasound Imaging, Spectroscopy and Ultrasound Imaging of Vascular Blood Flow as Early Indicators of Breast Cancer Response to Neoadjuvant Treatment.

Официальное название

Pilot Investigation of Ultrasound Imaging and Spectroscopy and Ultrasound Imaging of Vascular Blood Flow as Early Indicators of Breast Cancer Response to Neoadjuvant Treatment

Обзор

We have previously demonstrated that high-frequency ultrasound and spectroscopy, and recently conventional-frequency ultrasound and spectroscopy may be used to detect cell death in vitro, in situ and in vivo. The method can detect different forms of cell death and has been demonstrated to be sensitive to apoptotic, necrotic and mitotic cell death. The objectives of this study are to evaluate the use of ultrasound imaging and spectroscopy as a predictive marker of advanced tumour response to combined chemotherapy and radiotherapy. Since neoadjuvant treatments may also act on tumour vasculature to "normalize" it we will also evaluate blood-vessel imaging by standard Doppler-imaging and with standard higher-resolution imaging using clinically approved microbubble contrast agents. The main goal, as described above, is to select the best ultrasound spectroscopy parameter to use as an early predictor of pathological complete response.

Подробное описание

We have previously demonstrated that high-frequency ultrasound and spectroscopy, and recently conventional-frequency ultrasound and spectroscopy may be used to detect cell death in vitro, in situ and in vivo. The method can detect different forms of cell death and has been demonstrated to be sensitive to apoptotic, necrotic and mitotic cell death. The objectives of this study are to evaluate the use of ultrasound imaging and spectroscopy as a predictive marker of advanced tumour response to combined chemotherapy and radiotherapy. Since neoadjuvant treatments may also act on tumour vasculature to "normalize" it we will also evaluate blood-vessel imaging by standard Doppler-imaging and with standard higher-resolution imaging using clinically approved microbubble contrast agents.

The main goal, as described above, is to select the best ultrasound spectroscopy parameter to use as an early predictor of pathological complete response.

Specifically, we will as a primary endpoint correlate changes in ultrasound backscatter parameters obtained throughout the course of treatment with pathological complete, partial, or complete and partial response. We ultimately hope to be able to generate a Receiver-Operator-Curve for each parameter beyond this pilot investigation. The ultrasound-spectroscopy parameters to be examined include mid-band fit, spectral-slope and histogram-distribution-fit parameters related to scatterer size and concentration. From these various receiver-operator curves the best ultrasound parameter for predicting response will be selected and will aid to define the clinical specificity and sensitivity of the technique.

The secondary endpoint in this study will include examining the change in size of the tumour, which will also be measured using conventional gold-standard B-scan ultrasound imaging (length by width by height in addition to volume) and correlating that to the spectroscopic ultrasound changes determined at different times during patient treatment.

Other secondary endpoints will include measuring changes in blood vessel distribution by standard Doppler-imaging and standard microbubble contrast agent imaging. As another secondary endpoint we will also correlate our ultrasound changes with 2 and 5-year long-term clinical outcome.

Первичные конечные точки

• The primary Outcome will be correlate changes in ultrasound backscatter parameters obtained throughout the course of treatment with pathological complete, partial, or complete and partial response. [Срок оценки: 2 and 5-year long-term clinical outcome]

Вторичные конечные точки (2)

• The secondary Outcome of this study will include examining the change in tumor size. [Срок оценки: 2 and 5-year long-term clinical outcome]
• Other secondary Outcome will include measuring changes in the blood vessels distribution in the tumor. [Срок оценки: 2 and 5-year long-term clinical outcome]

Критерии участия

Критерии включения

The following criteria are necessary for study participation:

• Histologically or cytologically confirmed breast carcinoma, stage I-IV, which has not been treated with any first-line therapy and will be treated with neoadjuvant chemotherapy or neoadjuvant combined chemo-radiotherapy.
• Measurable disease by ultrasound, or MRI performed within 28 days prior to treatment.
• Eastern Co-operative Oncology Group (ECOG) Performance Status of 0 or 1.
• Life expectancy of at least 6 months.
• Adequate bone marrow, liver and renal function as assessed by the following laboratory. Requirements to be conducted within 7 days prior to dosing:

(i) hemoglobin >90 mg/dL (ii) leukocytes >3,000/mL (iii) absolute neutrophil count >1,500/mL (iv) platelets >100,000/mL (v) total bilirubin within normal institutional limits (vi) AST(SGOT)/ALT(SGPT) <2.5 X institutional upper limit of normal (vii) creatinine within normal institutional limits or creatinine clearance >60 mL/min/1.73 m2 for patients with creatinine levels above institutional upper limit of normal

• Patients should have the ability to understand and the willingness to sign a written informed consent document. Signed informed consent must be obtained prior to any study specific procedures.

Критерии исключения

The following conditions will exclude women from participation:

• Chemotherapy, radiotherapy, or major surgery within 4 weeks prior to registering the study or those who have not recovered from adverse events due to agents administered more than 4 weeks prior to registration.
• Receiving any other investigational agents.
• Known brain metastases.
• History of allergic reactions attributed to compounds of similar chemical or biologic composition.

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Модель наблюдения

Только случаи

Центры проведения

Канада · 1 центр

• Sunnybrook Health Sciences Centre — Toronto

Идентификаторы

NCT: NCT00437879 · 185-2006

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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