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High cholesterol levels affect mobilization of cells from bone marrow: Implications for transplants and understanding cancer onset

Date:
May 10, 2010
Source:
Instituto Gulbenkian de Ciência (IGC)
Summary:
Increased cholesterol levels are being increasingly recognized as risk factors for the onset and progression of several cancers. Now researchers in Portugal show that high levels of cholesterol can affect the microenvironment of the bone marrow, so that more cells move from the bone marrow to peripheral, circulating blood.

Increased cholesterol levels are being increasingly recognised as risk factors for the onset and progression of several cancers. Now researchers in Portugal show that high levels of cholesterol can affect the microenvironment of the bone marrow, so that more cells move from the bone marrow to peripheral, circulating blood.

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These findings, by Sergio Dias and his team, an external group of the Instituto Gulbenkian de Ciência, have implications for transplantation and further understanding bone marrow malignancies, are to appear in the next issue of the journal Blood.

Progenitors of blood cells develop in the bone marrow, where they mature in specific microenvironments, called niches, before exiting into peripheral blood, in a highly controlled fashion. It is well established that external stimuli affect these niches and therefore the production of mature blood cells. For example, patients with high cholesterol levels (hypercholesterolemia) have more peripheral blood cells and increased platelet levels (thrombocytosis). Working at the Portuguese Institute of Oncology Francisco Gentil, in Lisbon, the Neoangiogenesis group used a mouse model of hypercholesterolemia to show that cholesterol interferes with the bone marrow niche equilibrium, thus leading to increased exit from the bone marrow niche to the peripheral circulation.

These finding may have implications for transplants and bone marrow malignances. As Sérgio Dias points out "It is the first time, as far as we are aware, that cholesterol is directly linked to mobilisation of cells in the bone marrow. In a transplant setting, we believe patients with high cholesterol may be less 'receptive', since more blood cells exit to the peripheral vessels. Therefore drugs that modulate cholesterol levels may have beneficial effects also in a transplant setting."

"Furthermore, as cholesterol empties cells from the bone marrow microenvironment, we envisage that it may create more space for malignant leukaemia cells to come into the bone marrow, thus favoring acute leukaemia expansion and spread to secondary organs," this group leader adds.

This study was carried out with support from the Portuguese national funding agency, Fundação para a Ciência e a Tecnologia (FCT) and GlaxoSmithKline.


Story Source:

The above story is based on materials provided by Instituto Gulbenkian de Ciência (IGC). Note: Materials may be edited for content and length.


Journal Reference:

  1. A. L. Gomes, T. Carvalho, J. Serpa, C. Torre, S. Dias. Hypercholesterolemia promotes bone marrow cell mobilization by perturbing the SDF1:CXCR4 axis. Blood, 2009; DOI: 10.1182/blood-2009-08-240580

Cite This Page:

Instituto Gulbenkian de Ciência (IGC). "High cholesterol levels affect mobilization of cells from bone marrow: Implications for transplants and understanding cancer onset." ScienceDaily. ScienceDaily, 10 May 2010. <www.sciencedaily.com/releases/2010/05/100510092515.htm>.
Instituto Gulbenkian de Ciência (IGC). (2010, May 10). High cholesterol levels affect mobilization of cells from bone marrow: Implications for transplants and understanding cancer onset. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2010/05/100510092515.htm
Instituto Gulbenkian de Ciência (IGC). "High cholesterol levels affect mobilization of cells from bone marrow: Implications for transplants and understanding cancer onset." ScienceDaily. www.sciencedaily.com/releases/2010/05/100510092515.htm (accessed October 31, 2014).

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