Defective quorum sensing of acute lymphoblastic leukemic cells: Evidence of collective behavior of leukemic populations as semi-autonomous aberrant ecosystems Journal Article
| Authors: | Patel, S. J.; Su, D.; Darie, C. C.; Clarkson, B. D. |
| Article Title: | Defective quorum sensing of acute lymphoblastic leukemic cells: Evidence of collective behavior of leukemic populations as semi-autonomous aberrant ecosystems |
| Abstract: | Quorum sensing (QS) is a generic term used to describe cell-cell communication and collective decision making by bacterial and social insects to regulate the expression of specific genes in controlling cell density and other properties of the populations in response to nutrient supply or changes in the environment. QS mechanisms also have a role in higher organisms in maintaining homeostasis, regulation of the immune system and collective behavior of cancer cell populations. In the present study, we used a p190BCR-ABL driven pre-B acute lymphoblastic leukemia (ALL3) cell line derived from the pleural fluid of a terminally ill patient with ALL to test the QS hypothesis in leukemia. ALL3 cells don't grow at low density (LD) in liquid media but grow progressively faster at increasingly high cell densities (HD) in contrast to other established leukemic cell lines that grow well at very low starting cell densities. The ALL3 cells at LD are poised to grow but shortly die without additional stimulation. Supernates of ALL3 cells (HDSN) and some other primary cells grown at HD stimulate the growth of the LD ALL3 cells without which they won't survive. To get further insight into the activation processes we performed microarray analysis of the LD ALL3 cells after stimulation with ALL3 HDSN at days 1, 3, and 6. This screen identified several candidate genes, and we linked them to signaling networks and their functions. We observed that genes involved in lipid, cholesterol, fatty acid metabolism, and B cell activation are most up- or down-regulated upon stimulation of the LD ALL3 cells using HDSN. We also discuss other pathways that are differentially expressed upon stimulation of the LD ALL3 cells. Our findings suggest that the Ph+ ALL population achieves dominance by functioning as a collective aberrant ecosystem subject to defective quorum-sensing regulatory mechanisms. |
| Keywords: | signal transduction; adult; controlled study; human cell; cancer growth; comparative study; apoptosis; gene expression; gene function; chronic myeloid leukemia; acute lymphoblastic leukemia; microarray analysis; leukemia cell; cell density; genetic screening; growth factor; quorum sensing; fatty acid metabolism; cholesterol metabolism; b lymphocyte activation; human; article; cancer cell population; cancer ecosystem; hallmark of cancer; fam129c |
| Journal Title: | American Journal of Cancer Research |
| Volume: | 6 |
| Issue: | 6 |
| ISSN: | 2156-6976 |
| Publisher: | e-Century Publishing Corporation |
| Date Published: | 2016-01-01 |
| Start Page: | 1177 |
| End Page: | 1230 |
| Language: | English |
| PROVIDER: | scopus |
| PMCID: | PMC4937729 |
| PUBMED: | 27429840 |
| DOI/URL: | |
| Notes: | Article -- Export Date: 3 October 2016 -- Source: Scopus |
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