Macrophages Effect on Chemoresistance

Study Overview
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Brief Summary
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Macrophages are derived from monocytes recruited to the tumor site and stimulated by specific chemokines secreted by tumor cells. These tumor associated macrophages (TAMs) have been postulated as being involved in the progression of cancer. Based on our preliminary findings and on published data we hypothesized that macrophage-induced chemoresistance (MIC) can promote survival of pancreatic carcinoma cells during chemotherapy. The overall goal of this study is to evaluate the mechanism of MIC in an in-vitro model of Pancreatic ductal adenocarcinoma (PDA). methods: The human PDA cell line Panc1 will be grown in suitable conditions. Macrophages will be produced by incubating mononuclear cells from the blood of healthy donors in medium with M-CSF for 7 days. TAMs will be generated by culturing these macrophages with tumor-culture conditioning medium (TCCM) of PDA Cells for an additional 72 hours. Human pancreatic cells (PANC1) will be treated with gemcitabine following exposure to macrophages CM. Cell proliferation will be quantified by light microscopy and by an XTT Cell Proliferation Assay Kit.

Official Title
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Impact of Macrophages on De-Novo Chemoresistance of Adenocarcinoma Cells

Conditions
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the Focus of the Study is Macrophage-induced Chemoresistance in Pancreatic Carcinoma Cells During Chemotherapy.

Intervention / Treatment
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* Procedure: taking blood samples from healthy people


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: healthy people Exclusion Criteria: refusal to participate

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
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All

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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Design Details

Primary Purpose: Basic Science
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: irrelevant<br> | Procedure: taking blood samples from healthy people<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| proliferation and migration of PANC1 cell line in the tested groups. | the macrophages will be isolated from the blood we'll get from the healthy volunteers. the outcome measure is related to the basic research and not clinical so there's no symptom/outcome related to the participants. | one day to get the blood samples, and a year after that to complete the basic research | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To determine whether direct cell-to-cell interaction or soluble factors participate in MIC. |  | a year from obtaining the blood samples | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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macrophages, adenocarcinoma, chemoresistance