A Phase 3 interventional study of GcMAF injections (100 ng) and placebo in Breast Cancer, sponsored by S.LAB (SOLOWAYS). Not yet recruiting at 1 site in Russian Federation. Open to female participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2025-06-22.
Sponsored by S.LAB (SOLOWAYS) · Phase 3, Interventional, and Treatment
This randomized, double-blind, placebo-controlled pilot study aims to evaluate the efficacy and safety of GcMAF in reducing nagalase levels and improving clinical outcomes in female patients with metastatic breast cancer over six months. Sixty patients will be randomized into two groups receiving either weekly GcMAF or placebo injections. The primary endpoint is the change in serum nagalase levels from baseline to six months. Secondary endpoints include clinical status, quality of life, adverse effects, and markers of inflammation and immune activity. Tumor response will be assessed using RECIST criteria, and quality of life will be measured with the EORTC QLQ-C30 questionnaire. Immune and inflammation markers will be evaluated using flow cytometry and ELISA. Adverse events will be monitored and categorized according to severity. Inclusion criteria include confirmed metastatic breast cancer, completion of one line of systemic therapy, adequate organ function, and elevated serum nagalase levels. The study will involve baseline measurements, monthly assessments, and final evaluations to compare changes in nagalase levels and other clinical outcomes between the GcMAF and placebo groups.
This randomized, double-blind, placebo-controlled pilot study aims to evaluate the efficacy and safety of GcMAF (Gc Macrophage Activating Factor) in female patients with metastatic breast cancer. The primary objective is to assess the reduction in serum nagalase levels, an enzyme associated with tumor activity, over a six-month period, and to evaluate improvements in clinical outcomes. The study involves 60 patients who will be divided into two groups: one receiving weekly injections of GcMAF and the other receiving a placebo.
Patients eligible for the study must have histologically or cytologically confirmed metastatic breast cancer, completed at least one line of systemic therapy, and have elevated serum nagalase levels. Additional inclusion criteria include female patients aged 18 to 70 years, ECOG performance status of 0 to 2, adequate bone marrow, liver, and renal function, and an estimated life expectancy of at least six months. Patients must also agree to use effective contraception and provide informed consent.
The primary endpoint is the change in serum nagalase levels from baseline to six months. Measurements will be taken at baseline, monthly, and at the end of the study using standardized enzymatic assays. Secondary endpoints include clinical status, assessed through objective tumor response using RECIST criteria and performance status using the ECOG scale, quality of life evaluated through EORTC QLQ-C30 questionnaires, immune activity measured by flow cytometry for various immune cell subsets, and inflammation markers such as CRP, interleukins, and TNF-alpha measured by ELISA. Adverse effects will be monitored weekly and categorized according to the Common Terminology Criteria for Adverse Events (CTCAE) v5.0.
The study procedures include initial screening to measure baseline nagalase levels and assess eligibility, followed by randomization into the GcMAF or placebo groups. Patients will receive weekly injections for six months, with monthly assessments of nagalase levels, clinical status, quality of life, and blood samples for immune and inflammation markers. Interim assessments will occur at three months, with final assessments and data analysis at six months.
Exclusion criteria include the presence of other active malignancies, severe uncontrolled illnesses, pregnancy or breastfeeding, previous treatment with GcMAF, and known hypersensitivity to the study drug components. The study timeline consists of patient recruitment and baseline measurements in the first month, followed by six months of treatment and monitoring, with interim and final assessments and subsequent data analysis.
This study aims to determine if GcMAF can significantly reduce serum nagalase levels and improve clinical outcomes, including tumor response, performance status, quality of life, and immune and inflammation markers, in patients with metastatic breast cancer. The results will provide insight into the potential therapeutic benefits of GcMAF for this patient population.
14,825 studies on the registry are indexed under Breast Neoplasms; 3,319 are open to participants now.
This study's planned enrollment of 60 is below the median of 72 across 10,896 interventional studies indexed under Breast Neoplasms.
Browse Breast Neoplasms studies →S.LAB (SOLOWAYS) is the lead sponsor of 29 studies on the registry; 7 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Diagnosis:
Ability to understand and willingness to sign a written informed consent document.
Exclusion Criteria:
Concurrent :
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.
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.
“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.
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.
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.
It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.
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 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).
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
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.
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.
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Histologically or cytologically confirmed
The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).
Your pathology report is the document that shows this.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Metastases
Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Line of therapy
A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.
“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.
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.
Life expectancy
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Absolute neutrophil count (ANC)
The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.
It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (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.
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.
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.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
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.
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.
COPD
Chronic obstructive pulmonary disease: long-term lung disease that makes it hard to breathe out, including emphysema and chronic bronchitis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GcMAF injections (100 ng)
Biological: GcMAF injections (100 ng)
placebo injections (100 ng)
Other: placebo
The GcMAF 100 ng (Gc protein macrophage-activating factor) will be injected subcutaneously.
the placebo solution will be injected subcutaneously 100 ng.
Change in Serum Nagalase Levels
Time frame: 6 months
Change in RECIST (Response Evaluation Criteria in Solid Tumors) criteria.
Time frame: 6 months
MRI changes in cancer volume
Time frame: 6 months
Tumor response
one of 4 categories Complete Response (CR), Partial Response (PR), Stable Disease (SD),Progressive Disease (PD)
Time frame: 6 months
Eastern Cooperative Oncology Group (ECOG) performance status change
Time frame: 6 months
EORTC QLQ-C30 change
(European Organization for Research and Treatment of Cancer Quality of Life Questionnaire
Time frame: 6 months
CD4+T cells percentage
Time frame: 6 months
CD8+T cells percentage
Time frame: 6 months
NK cells percentage
Time frame: 6 months
CRP percentage
Time frame: 6 months
IL-6 percentage
Time frame: 6 months
IL-10 percentage
Time frame: 6 months
tumor necrosis factor-alpha (TNF-α) necrosis factor-alpha (TNF-α)
Time frame: 6 months
Adverse events
any adverse events will be reported
Time frame: 6 months
rank of adverse event severity in numbers
Time frame: 6 months
This study is not yet recruiting, as verified in Jun 2025. You cannot join it, but the record below documents what was studied.
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S.LAB (SOLOWAYS)