An observational study in Prostate Cancer, Breast Cancer and Colon Cancer, sponsored by National Cancer Institute (NCI). Recruiting at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-11-09.
Sponsored by National Cancer Institute (NCI) · Observational
This study will collect blood from patients with cancer to study the level of cells which decrease the immune response (suppressor cells) before and after chemotherapy. Patients 18 years of age and older with cancer may participate. This study does not involve treatment.
Participants will have about 50 ml (3 tablespoonfuls) of blood drawn. Depending on their condition, patients may be invited to enroll in a clinical research study involving chemotherapy, radiotherapy, or surgery. Additional 40-ml blood samples may be drawn during the course of treatment.
Background:
Objectives:
Eligibility:
Design:
- Cases will be evaluated by NCI or Interventional Radiology, NIH Clinical Center personnel. Blood, tissue, urine, saliva or other samples may be collected at the initial visit and at follow-up visits.
7,046 studies on the registry are indexed under Prostatic Neoplasms; 1,580 are open to participants now.
This study's planned enrollment of 1,750 is above the median of 200 across 1,310 observational studies indexed under Prostatic Neoplasms.
Browse Prostatic Neoplasms studies →National Cancer Institute (NCI) is the lead sponsor of 3,556 studies on the registry; 336 are open to participants now.
Of its 411 completed or terminated interventional studies of FDA-regulated products, 373 (91%) have results posted.
Counted across the registry records on this site, refreshed daily.
Primary clinical; healthy volunteers may include NIH employees
Patients with a known or suspected and healthy volunteers 18 years of age and older are eligible.
Performance status of 0, 1, 2, or 3 for admission to this protocol.
Ability to understand and the willingness to sign a written document.
INCLUSION FOR APHERESIS:
Note: Effective with Amendment CC, participants will no longer be asked to undergo apheresis. This content is being retained for historical reference.
greater than or equal to 10 mg/dL and count > 75,000/mm(3)
Weight greater than 25 kg
negative
- within normal limits
Partial Thromboplastin Time - within normal limits
Medically indicated central line in place or adequate peripheral venous access
EXCLUSION CRITERIA:
None.
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.
Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hemoglobin (Hb)
The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Platelets
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
INR, PT and aPTT (clotting tests)
Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.
Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Healthy volunteers 18 years of age and older
Participants with cancer 18 years of age and older
Undertake genetic analysis of both prokaryotic and eukaryotic samples for advanced mutational analysis.
Undertake genetic analysis of both prokaryotic and eukaryotic samples for advanced mutational analysis.
Time frame: ongoing
Correlate analysis results with clinical parameters such as demographics, toxicities, and treatment outcomes.
Correlate analysis results with clinical parameters such as demographics, toxicities, and treatment outcomes.
Time frame: ongoing
Collection of tissue, urine, saliva, stool and blood components, which include serum, leukocytes, peripheral blood mononuclear cells (PBMC), and circulating tumor cells (cTC), of human subjects.
Analyze tissue, urine, saliva, stool and blood components, which include serum, leukocytes, peripheral blood mononuclear cells (PBMC), and circulating tumor cells (cTC), of human subjects.
Time frame: ongoing
Plan to share: Yes — All IPD recorded in the medical record will be shared with intramural investigators upon request. @@@@@@All IPD recorded in the medical record will be shared with intramural investigators upon request. In addition, all large scale genomic sequencing data will be shared with subscribers to dbGaP.
Supporting information: Study protocol, Statistical analysis plan, Informed consent form
Time frame: Clinical data available during the study and indefinitely.@@@@@@Genomic data are available once genomic data are uploaded per protocol GDS plan for as long as database is active.
Access criteria: Clinical data will be made available via subscription to BTRIS and with the permission of the study PI. @@@@@@Genomic data are made available via dbGaP through requests to the data custodians.
Started Jul 2002 (actual).
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
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