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Identification and characterization of splenic adherent cells forming densely-packed colonies. 2019

Masataka Hirasaki, and Yosuke Mizuno, and Yui Ida, and Takayuki Murakoshi, and Akihiko Okuda, and Norihiro Kotani
Division of Developmental Biology, Research Center for Genomic Medicine, Saitama Medical University, Yamane, Hidaka, Saitama, Japan.

It is thought that the spleen contains stem cells that differentiate into somatic cells other than immune cells. We investigated the presence of these hypothetical splenic cells with stem cell characteristics and identified adherent cells forming densely-packed colonies (Splenic Adherent Colony-forming Cell; SACC) in the spleen. Splenic Adherent Colony-forming Cell was positive for alkaline phosphatase staining and stage-specific embryonic antigen (SSEA)-1 antigen. However, the self-renewal properties of SACCs were limited because they stopped cell proliferation once colonies visible to the naked eye were formed. Gene expression analyses by semi-quantitative RT-PCR revealed the significant expression of c-Myc and Klf4, whereas faint or no expression was evident for Nanog, Oct3/4, and Sox2. Global expression analyses by DNA microarray and subsequent gene ontology analyses revealed that the expression levels of genes related to the immune system were significantly lower in SACCs than in control splenic cells. In contrast, genes unrelated to the immune system, such as those involved in cell adhesion and axon guidance, were relatively highly expressed in SACCs compared with control splenic cells. Taken together, we identified a novel cell type residing in the spleen that is different from the hypothetical splenic stem cell, but which bears some, but not all, characteristics that represent an undifferentiated state.

UI MeSH Term Description Entries
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D002448 Cell Adhesion Adherence of cells to surfaces or to other cells. Adhesion, Cell,Adhesions, Cell,Cell Adhesions
D000090062 Kruppel-Like Factor 4 A member of zinc finger-containing transcription factors that belongs to the KRUPPEL-LIKE FACTOR family, involved in the regulation of diverse cellular processes such as cell growth, proliferation, differentiation, and APOPTOSIS. EZF Protein,Endothelial Kruppel-Like Zinc Finger Protein,Epithelial Zinc Finger Protein,GKLF Protein,Gut-Enriched Kruppel-Like Factor,Klf4 Protein,Krueppel-Like-Factor 4,4, Krueppel-Like-Factor,4, Kruppel-Like Factor,Endothelial Kruppel Like Zinc Finger Protein,Factor 4, Kruppel-Like,Factor, Gut-Enriched Kruppel-Like,Gut Enriched Kruppel Like Factor,Kruppel Like Factor 4,Protein, EZF,Protein, GKLF,Protein, Klf4
D000469 Alkaline Phosphatase An enzyme that catalyzes the conversion of an orthophosphoric monoester and water to an alcohol and orthophosphate. EC 3.1.3.1.
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013154 Spleen An encapsulated lymphatic organ through which venous blood filters.
D016256 Lewis X Antigen A trisaccharide antigen expressed on glycolipids and many cell-surface glycoproteins. In the blood the antigen is found on the surface of NEUTROPHILS; EOSINOPHILS; and MONOCYTES. In addition, Lewis X antigen is a stage-specific embryonic antigen. Antigens, CD15,CD15 Antigens,Le(X) Antigen,Leu-M1 Antigens,Lewis X Related Antigens,SSEA-1,SSEA-1 Determinant,Stage-Specific Embryonic Antigen-1,3 alpha-Fucosyl-N-Acetyl Lactosamine,CD15 Antigen,Galbeta(1-4)Fucalpha(1-3)GlcNAc,Hapten X,Lewis X Hapten,SSEA 1,3 alpha Fucosyl N Acetyl Lactosamine,Antigen, Lewis X,Embryonic Antigen-1, Stage-Specific,Leu M1 Antigens,SSEA 1 Determinant,Stage Specific Embryonic Antigen 1,X Antigen, Lewis,X Hapten, Lewis
D049109 Cell Proliferation All of the processes involved in increasing CELL NUMBER including CELL DIVISION. Cell Growth in Number,Cellular Proliferation,Cell Multiplication,Cell Number Growth,Growth, Cell Number,Multiplication, Cell,Number Growth, Cell,Proliferation, Cell,Proliferation, Cellular
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus

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