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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Transl+Med
2018 ; 16
(1
): 85
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An in vitro investigation of telocytes-educated macrophages: morphology,
heterocellular junctions, apoptosis and invasion analysis
#MMPMID29615057
Jiang XJ
; Cretoiu D
; Shen ZJ
; Yang XJ
J Transl Med
2018[Apr]; 16
(1
): 85
PMID29615057
show ga
BACKGROUND: Telocytes (TCs), a recently discovered novel type of interstitial
cells, were also found in a wide variety of human and mammalian reproductive
organs/tissues, including uterus, oviduct and placenta. Previously, we
demonstrated that TCs-conditioned media was capable of activating peritoneal
macrophages (pMACs) through paracrine effects. This study investigates the
hypothesis that direct interaction of TCs with pMACs will also play a significant
role in immunoregulation of pMACs. METHODS: TCs and pMACs were derived from the
uterus and intraperitoneal cavity of female BALB/c mice, respectively. TCs were
identified by immunofluorescence and then co-cultured directly with pMACs for
24 h without added cytokines, to observe the in vitro biological behavior of
pMACs. We used histochemical staining to study morphology and mitochondrial
metabolism of pMACs, scanning electron microscopy to study heterocellular
junctions, flow cytometry to investigate mitochondrial membrane potential (??m)
and apoptosis, and transwell chambers to study invasion ability. Student-t test
was used accordingly. RESULTS: Presently, TCs with typical structure and
immunophenotype of double CD-34-positive/vimentin-positive were successfully
isolated. pMACs co-cultured with TCs showed obviously morphological activation,
with enhanced energy metabolism (P?0.05). Meanwhile, direct physical
cell-to-cell interaction promoted the development of heterocellular junctions
between TCs and pMACs. Furthermore, TCs treatment markedly reduced the depletion
of ??m in co-cultured pMACs (all P?0.05), and inhibited their apoptosis
(P?0.05). Functionally, pMACs co-cultured with TCs showed enhanced invasion
ability (P?0.05). CONCLUSIONS: Direct physical cell-to-cell interaction
promoted the development of heterocellular junctions between TCs and pMACs,
presumably responsible for the observed novel efficient way of pMACs activation
via mitochondrial signaling pathway. TCs-educated pMACs might be a promising way
to restore the defective immunosurveillance in endometriosis (EMs), led to the
enhanced treatment efficacy of EMs in a simple and clinically feasible fashion.