Biomaterial Database

T cell receptor-gamma, delta-expressing fetal mouse thymocytes are generated without T cell receptor V beta selection. 1996

E Mertsching, and R Ceredig

U 184 INSERM, Faculté de Médecine, Strasbourg, France.

We investigated whether fetal mouse T cell receptor (TCR) gamma delta cells have been subjected to so-called TCR beta selection at the CD25 stage of thymus development. To this end, we carried out a comparative three-color flow microfluorimetric analysis to TCR gamma delta cells developing in the fetal, neonatal and adult thymus using monoclonal antibodies to CD2, CD8, CD24, CD25 and CD44. Day-15 fetal TCR gamma delta cells were CD2+ suggesting an origin at a post-CD25 stage. Molecular analysis of TCR beta rearrangements were also carried out. Thus, by semi-quantitative polymerase chain reaction (PCR) amplification of V beta 6 and V beta 8 to J beta 2 rearrangements day-15 fetal TCR gamma delta showed extensive TCR beta rearrangements, a finding confirmed by PCR amplification from single micromanipulated cells. Finally, sequencing analysis of 104 PCR-amplified TCR VDJ beta 2 fragments showed that the majority (58%) were rearranged out of frame . Taken together, these phenotypic and molecular analyses suggest that fetal TCR gamma delta cells have not been subject to TCR beta selection.

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
D008811	Mice, Inbred DBA	An inbred strain of mouse. Specific substrains are used in a variety of areas of BIOMEDICAL RESEARCH such as DBA/1J, which is used as a model for RHEUMATOID ARTHRITIS.	Mice, DBA,Mouse, DBA,Mouse, Inbred DBA,DBA Mice,DBA Mice, Inbred,DBA Mouse,DBA Mouse, Inbred,Inbred DBA Mice,Inbred DBA Mouse
D008969	Molecular Sequence Data	Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.	Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D002454	Cell Differentiation	Progressive restriction of the developmental potential and increasing specialization of function that leads to the formation of specialized cells, tissues, and organs.	Differentiation, Cell,Cell Differentiations,Differentiations, Cell
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
D000831	Animals, Newborn	Refers to animals in the period of time just after birth.	Animals, Neonatal,Animal, Neonatal,Animal, Newborn,Neonatal Animal,Neonatal Animals,Newborn Animal,Newborn Animals
D001483	Base Sequence	The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.	DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D013950	Thymus Gland	A single, unpaired primary lymphoid organ situated in the MEDIASTINUM, extending superiorly into the neck to the lower edge of the THYROID GLAND and inferiorly to the fourth costal cartilage. It is necessary for normal development of immunologic function early in life. By puberty, it begins to involute and much of the tissue is replaced by fat.	Thymus,Gland, Thymus,Glands, Thymus,Thymus Glands
D015333	Gene Rearrangement, beta-Chain T-Cell Antigen Receptor	Ordered rearrangement of T-cell variable gene regions coding for the beta-chain of antigen receptors.	T-Cell Antigen Receptor beta-Chain Gene Rearrangement,T-Lymphocyte Antigen Receptor beta-Chain Gene Rearrangement,Gene Rearrangement, beta-Chain T Cell Antigen Receptor,T Cell beta-Chain Gene Rearrangement,T Lymphocyte beta-Chain Gene Rearrangement,Gene Rearrangement, beta Chain T Cell Antigen Receptor,T Cell Antigen Receptor beta Chain Gene Rearrangement,T Cell beta Chain Gene Rearrangement,T Lymphocyte Antigen Receptor beta Chain Gene Rearrangement,T Lymphocyte beta Chain Gene Rearrangement
D016133	Polymerase Chain Reaction	In vitro method for producing large amounts of specific DNA or RNA fragments of defined length and sequence from small amounts of short oligonucleotide flanking sequences (primers). The essential steps include thermal denaturation of the double-stranded target molecules, annealing of the primers to their complementary sequences, and extension of the annealed primers by enzymatic synthesis with DNA polymerase. The reaction is efficient, specific, and extremely sensitive. Uses for the reaction include disease diagnosis, detection of difficult-to-isolate pathogens, mutation analysis, genetic testing, DNA sequencing, and analyzing evolutionary relationships.	Anchored PCR,Inverse PCR,Nested PCR,PCR,Anchored Polymerase Chain Reaction,Inverse Polymerase Chain Reaction,Nested Polymerase Chain Reaction,PCR, Anchored,PCR, Inverse,PCR, Nested,Polymerase Chain Reactions,Reaction, Polymerase Chain,Reactions, Polymerase Chain