title: Developmental expression patterns of chemokines CXCL11, CXCL12 and their receptor CXCR7 in testes of common marmoset and human.
abstract: The chemokine receptor CXCR7 interacts with the chemokines CXCL11 and CXCL12. During development, this ligand receptor system (C-X-C) provokes cell-type-specific responses in terms of migration, adhesion or ligand sequestration. It is active in zebrafish and rodents but no data are available for its presence or function in primate testes. Real-time quantitative polymerase chain reaction was performed in monkeys to detect CXCL11, CXCL12 and CXCR7. At the protein level, CXCL12 and CXCR7 were localized in the testes of the marmoset (Callitrix jacchus) whereas CXCR7 patterns were determined for various stages in human testes. Morphometry and flow cytometry were applied to quantify CXCR7-positive cells in monkeys. Transcript levels and protein expression of CXCR7 were detectable throughout testicular development. In both species, CXCR7 protein expression was restricted to premeiotic germ cells. In immature marmoset testes, 69.9% ± 9% of the total germ cell population were labelled for CXCR7, whereas in the adult, 4.7% ± 2.7% were positive for CXCR7. CXCL12 mRNA was detectable in all developmental stages in marmosets. The CXCL12 protein was exclusively localized to Sertoli cells. This pattern of CXCL12/CXCR7 indicates their involvement in regulatory processes that possibly orchestrate the interaction between undifferentiated germ cells and Sertoli cells.
authors: Centre of Reproductive Medicine and Andrology, CeRA, Institute of Reproductive and Regenerative Biology, Albert-Schweizer-Campus 1, Building D11, 48149, Münster, Germany.
authors: Birgit
authors: B
authors: Westernströer
authors: Daniel
authors: D
authors: Langenstroth
authors: Sabine
authors: S
authors: Kliesch
authors: Britta
authors: B
authors: Troppmann
authors: Klaus
authors: K
authors: Redmann
authors: Joni
authors: J
authors: Macdonald
authors: Rod
authors: R
authors: Mitchell
authors: Joachim
authors: J
authors: Wistuba
authors: Stefan
authors: S
authors: Schlatt
authors: Nina
authors: N
authors: Neuhaus
mesh_terms: D000818:Animals; D002144:Callithrix; D002454:Cell Differentiation / Q000502:physiology*; D045744:Cell Line, Tumor / Q000378:metabolism; D054371:Chemokine CXCL11 / Q000378:metabolism*; D054377:Chemokine CXCL12 / Q000378:metabolism*; D006801:Humans; D008024:Ligands; D008297:Male; D054387:Receptors, CXCR / Q000378:metabolism*; D015398:Signal Transduction / Q000502:physiology; D013737:Testis / Q000378:metabolism*
chemical_list: D054371:Chemokine CXCL11; D054377:Chemokine CXCL12; D008024:Ligands; D054387:Receptors, CXCR