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Preparation of Plasma Membrane Vesicles from Bone Marrow Mesenchymal Stem Cells for Potential Cytoplasm Replacement Therapy

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Stem cell transplantation and MBL replacement therapy.

David C Kilpatrick¹

¹Scottish National Blood Transfusion Service, Ellen's Glen Road, Edinburgh, EH 17 7QT, Scotland, UK. dave.kilpatrick@snbts.csa.scot.nhs.uk

Current Stem Cell Research & Therapy

|May 14, 2008

Summary

Mannose-binding lectin (MBL) may affect infection risk in patients undergoing chemotherapy or stem cell transplants. Donor MBL-2 gene mutations surprisingly influenced recipient infection risk, suggesting novel immune mechanisms.

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Area of Science:

Immunology
Hematology
Genetics

Background:

Mannose-binding lectin (MBL) plays a role in innate immunity.
MBL influences infection susceptibility in patients undergoing chemotherapy and stem cell transplantation.
Previous research on MBL's role in these patient groups has yielded inconsistent findings.

Purpose of the Study:

To investigate the influence of MBL on infection susceptibility in patients receiving chemotherapy or stem cell transplants.
To explore the surprising observation that donor MBL-2 gene mutations affect recipient infection risk.
To discuss potential mechanisms, including MBL binding to autologous cells, and its implications for MBL replacement therapy.

Main Methods:

Review of existing literature on MBL, chemotherapy, stem cell transplantation, and infection risk.
Analysis of studies reporting MBL-2 gene mutations in donors and their impact on allogeneic stem cell transplant recipients.
Evaluation of evidence regarding MBL synthesis by leukocytes and MBL-cell interactions.

Main Results:

MBL may influence infection susceptibility in patients undergoing chemotherapy or stem cell transplantation.
Donor MBL-2 gene mutations were found to influence the risk of serious infections in allogeneic stem cell transplant recipients.
Evidence suggests MBL may bind to autologous cells, potentially inducing immunological maturation.

Conclusions:

Donor MBL-2 genotype is a significant factor influencing infection risk in stem cell transplant recipients.
The mechanism likely involves MBL binding to host cells rather than MBL production by donor leukocytes.
Understanding MBL-cell interactions is crucial for developing MBL replacement therapies.