Isolation and Culture of Non-adherent Cells for Cell Reprogramming
Andrianto1, Budi Susetyo Pikir1, I Gde Rurus Suryawan1
1Department of Cardiology and Vascular Medicine, Faculty of Medicine, University of Airlangga, Surabaya, Indonesia.
Insights
Optimizing CD34+ cell culture is key for cardiac regeneration therapies. Blood plasma medium supports CD34+ cell adherence and viability, unlike fibronectin or vitronectin media, for potential myocardial repair.
Area of Science:
- Regenerative Medicine
- Cardiovascular Biology
- Cell Biology
Background:
- Coronary heart disease (CHD) remains a major global mortality cause, with current treatments unable to replace damaged heart muscle.
- Direct cell reprogramming offers a pathway for cellular cardiomyoplasty and myocardial tissue regeneration.
- CD34+ cells, sharing embryonic origins with cardiomyocytes, are a promising source for regenerative approaches.
Purpose of the Study:
- To determine the optimal method for isolating and culturing CD34+ peripheral blood cells.
- To evaluate the efficacy of different culture media for CD34+ cell expansion and adherence.
- To assess CD34+ cell viability and confluence in various culture conditions for potential genetic modification.
Main Methods:
- Peripheral blood samples were obtained and processed using pre-enrichment, isolation, and expansion techniques.
- CD34+ cell cultures were established using blood plasma, vitronectin, and fibronectin media.
- Cellular viability, adherence, and confluence were monitored over seven days.
Main Results:
- CD34+ cells cultured in blood plasma medium demonstrated adherence and spindle/oval morphologies by Day 4.
- Significant cell death and lack of adherence were observed in vitronectin and fibronectin media.
- Blood plasma medium supported robust CD34+ cell adherence and achieved 75% confluence by Day 7.
Conclusions:
- CD34+ cells isolated via density and magnetic methods are viable and adhere effectively in blood plasma medium.
- Blood plasma medium is superior to fibronectin and vitronectin for culturing CD34+ cells for regenerative applications.
- Optimized CD34+ cell culture conditions are essential for efficient genetic modification and subsequent myocardial regeneration strategies.
Abstract:
Coronary heart disease (CHD) is a leading cause of death globally, while its current management is limited to reducing the myocardial infarction area without actually replacing dead cardiomyocytes. Direct cell reprogramming is a method of cellular cardiomyoplasty which aims for myocardial tissue regeneration, and CD34+ cells are one of the potential sources due to their shared embryonic origin with cardiomyocytes. However, the isolation and culture of non-adherent CD34+ cells is crucial to obtain adequate cells for high-efficiency genetic modification. This study aimed to investigate the optimal method for isolation and culture of CD34+ peripheral blood cells using certain culture media. A peripheral blood sample was obtained from a healthy subject and underwent pre-enrichment, isolation, and expansion. The culture was subsequently observed for their viability, adherence, and confluence. Day 0 observation of the culture showed a healthy CD34+ cell with a round cell shape, without any adherent cells present yet. Day 4 of observation showed that CD34+ cells within the blood plasma medium became adherent, indicated by their transformations into spindle or oval morphologies. Meanwhile, CD34+ cells in vitronectin and fibronectin media showed no adherent cells and many of them died. Day 7 observation revealed more adherent CD34+ cells in blood plasma medium, and which had 75% of confluence. In conclusion, the CD34+ cells that were isolated using a combination of density and magnetic methods may be viable and adequately adhere in culture using blood plasma medium, but not in cultures using fibronectin and vitronectin.
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