Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profile of adipose-resident macrophages and mesenchymal stem cells.

ABSTRACT: It is commonly-recognized that hematopoietic cells residing in adipose tissue (AT) exhibit a broad range of physiological functions for maintenance of homeostasis and remodeling and repair of tissues aside from the involvement in inflammation. We evaluated the cell composition of hematopoietic cells in human non-obese AT and analyzed AT-resident macrophages in detail. Liposuction aspirates were obtained from healthy donors undergoing liposuction of the abdomen and thighs. CD34-positive AT resident macrophages (ATMs), CD34-negative ATMs and adipose stromal cells were sorted from aspirated AT by a multiparameter fluorescent-activated cell sorter. Circulating monocytes were also sorted from peripheral blood.These 4 condition were analysed transcription profile.

ORGANISM(S): Homo sapiens

SUBMITTER: Hisako Ishimine

PROVIDER: E-GEOD-37660 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Intense immunosuppression followed by autologous hematopoietic stem cell transplantation (aHSCT) is a potential treatment for patients suffering from aggressive multiple sclerosis (MS). However it remains unresolved whether autologous CD34+ hematopoietic progenitor cells of MS patients show gene expression differences prior to aHSCT that indicate a preset proinflammatory state, which would then also predispose to or predetermine recurrence of the autoimmune disease. To approach this key point we compared the gene expression signature of CD34+ and CD34- cells collected from MS patients and healthy donors (HD). Whole genome gene expression of CD34+ and CD34- cells was analysed with the Human 4x44K Design Array (Agilent-Technologies). As main observation we found only minor differences in the gene expression signature of MS patients compared to HD. Only a single gene, troponin-type-1 (TNNT1), reached statistical significance after correction for multiple comparisons (logFC=3.1, p<0.01). There was a decreased expression of several protease genes, myeloperoxidase (MPO), neutrophil-elastase (ELA2), cathepsin-G (CTSG) and serine-protease 21 (PRSS21) in HPCs of MS patients, albeit not reaching statistical significance. In summary we did not detect substantial alterations in the gene expression profile of CD34+ HPCs in MS. Our data support the use of autologous hematopoietic stem cell transplantation for treatment of an autoimmune disease. Samples of CD34+ cells were obtained from 4 female MS patients and 4 age matched healthy donors (3 female) mobilized by G-CSF (2x5M-NM-<g/kg/day) and 4 MS patients (2 female) mobilized by G-CSF (5M-NM-<g/kg/day) plus Cyclophosphamide (Cy, 4g/m2). White blood cells, containing the CD34+ cell fraction, were collected by leucocytapheresis from peripheral blood, frozen and stored in liquid nitrogen. All samples were thawed and processed at one center and CD34+ HPCs purified by magnetic bead separation using the autoMACS system (Miltenyi). Purity and viability of CD34+ cells was analyzed by Fluorescence Activated Cell Sorter (FACS). Total cellular RNA were extracted with TRIzol reagent and analyzed with the Human 4x44K Design Array (Agilent-Technologies).

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Transcription profile of adipose-resident macrophages and mesenchymal stem cells.

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