BACKGROUND: Immune mechanisms of extracorporeal photochemotherapy (ECP) in refractory/resistant graft-versus-host disease (GvHD) are complex. We have previously analyzed the role of CD4CD25Foxp3 regulatory T cells (T-regs). METHODS: In the current study, we have enlarged the size of the population (n=27; chronic GvHD=18, acute GvHD=9) for a median follow-up of 24 months. T-regs were monitored for CD4, CD25, glucocorticoid-induced tumor necrosis factor receptor (GITR), CD62L, CCR7, Foxp3, and STAT-5. Immune analysis by interleukin (IL)-17 Elispot was carried out on circulating T-helper CD4 cells secreting IL-17, a subset of T cells considered relevant in the pathogenesis of GvHD. RESULTS: We confirm that ECP is accompanied by a significant increase of CD4CD25Foxp3GITRCD62LCCR7 T-regs. Sorted T-regs show augmented phosphorylation of STAT-5. Only ECP-responding patients demonstrate a raise of circulating T-regs, being mostly affected by chronic GvHD. Moreover, this phenomenon corresponds to a diminished secretion of IL-17. DISCUSSION: In conclusion, our study shows that T-regs represent important immune mediators of the clinical benefits of ECP in patients affected by GvHD.
BACKGROUND: Immune mechanisms of extracorporeal photochemotherapy (ECP) in refractory/resistant graft-versus-host disease (GvHD) are complex. We have previously analyzed the role of CD4CD25Foxp3 regulatory T cells (T-regs). METHODS: In the current study, we have enlarged the size of the population (n=27; chronic GvHD=18, acute GvHD=9) for a median follow-up of 24 months. T-regs were monitored for CD4, CD25, glucocorticoid-induced tumor necrosis factor receptor (GITR), CD62L, CCR7, Foxp3, and STAT-5. Immune analysis by interleukin (IL)-17 Elispot was carried out on circulating T-helper CD4 cells secreting IL-17, a subset of T cells considered relevant in the pathogenesis of GvHD. RESULTS: We confirm that ECP is accompanied by a significant increase of CD4CD25Foxp3GITRCD62LCCR7 T-regs. Sorted T-regs show augmented phosphorylation of STAT-5. Only ECP-responding patients demonstrate a raise of circulating T-regs, being mostly affected by chronic GvHD. Moreover, this phenomenon corresponds to a diminished secretion of IL-17. DISCUSSION: In conclusion, our study shows that T-regs represent important immune mediators of the clinical benefits of ECP in patients affected by GvHD.
Authors: Roger Belizaire; Haesook T Kim; Samuel J Poryanda; Nikola V Mirkovic; Evelyn Hipolito; William J Savage; Carol G Reynolds; Marie J Fields; Jennifer Whangbo; Tomohiro Kubo; Sarah Nikiforow; Edwin P Alyea; Philippe Armand; Corey S Cutler; Vincent T Ho; Bruce R Blazar; Joseph H Antin; Jerome Ritz; Robert J Soiffer; John Koreth Journal: Blood Adv Date: 2019-04-09
Authors: R Knobler; G Berlin; P Calzavara-Pinton; H Greinix; P Jaksch; L Laroche; J Ludvigsson; P Quaglino; W Reinisch; J Scarisbrick; T Schwarz; P Wolf; P Arenberger; C Assaf; M Bagot; M Barr; A Bohbot; L Bruckner-Tuderman; B Dreno; A Enk; L French; R Gniadecki; H Gollnick; M Hertl; C Jantschitsch; A Jung; U Just; C-D Klemke; U Lippert; T Luger; E Papadavid; H Pehamberger; A Ranki; R Stadler; W Sterry; I H Wolf; M Worm; J Zic; C C Zouboulis; U Hillen Journal: J Eur Acad Dermatol Venereol Date: 2014-01 Impact factor: 6.166
Authors: N Rieber; I Wecker; D Neri; K Fuchs; I Schäfer; A Brand; M Pfeiffer; P Lang; W Bethge; O Amon; R Handgretinger; D Hartl Journal: Bone Marrow Transplant Date: 2014-01-27 Impact factor: 5.483