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Dendritic cell profiles in the inflamed colonic mucosa predict the responses to tumor necrosis factor alpha inhibitors in inflammatory bowel disease

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FIGURE 1

Dendritic cell (DC) phenotypes: DCs were isolated from the lamina propria by enzymatic degradation and mechanical dissociation. Data were analysed using FlowJo software. (A) Mononuclear cells were identified within the total cell population (based on the forward/side scatter properties). Total DCs were identified among the mononuclear cells as HLA-DR+ and lineage negative (CD14, CD16, CD3, CD19) cells. The DCs were further divided into two major subpopulations, defined as conventional DCs (lineage negative, HLA-DR+/CD11chi/CD123-CD303-) and plasmacytoid DCs (lineage negative, HLA-DR+/CD11c-/CD123+/CD303+). (B) Conventional DCs were further investigated for CD80, CD83, and CD86 expression. DCs isolated from the inflamed mucosa show enhanced expression of CD80, CD86 and CD83 (red histogram) compared to DCs isolated from the uninflamed mucosa of healthy donors (blue histogram) and unstained cells (yellow histogram). (C) Examples of conventional DCs expressing CD103 from the uninflamed mucosa (left) and inflamed mucosa (right).
Dendritic cell (DC) phenotypes: DCs were isolated from the lamina propria by enzymatic degradation and mechanical dissociation. Data were analysed using FlowJo software. (A) Mononuclear cells were identified within the total cell population (based on the forward/side scatter properties). Total DCs were identified among the mononuclear cells as HLA-DR+ and lineage negative (CD14, CD16, CD3, CD19) cells. The DCs were further divided into two major subpopulations, defined as conventional DCs (lineage negative, HLA-DR+/CD11chi/CD123-CD303-) and plasmacytoid DCs (lineage negative, HLA-DR+/CD11c-/CD123+/CD303+). (B) Conventional DCs were further investigated for CD80, CD83, and CD86 expression. DCs isolated from the inflamed mucosa show enhanced expression of CD80, CD86 and CD83 (red histogram) compared to DCs isolated from the uninflamed mucosa of healthy donors (blue histogram) and unstained cells (yellow histogram). (C) Examples of conventional DCs expressing CD103 from the uninflamed mucosa (left) and inflamed mucosa (right).

FIGURE 2

Predictors of the response to treatment. Inflammatory bowel disease patients who responded to TNFa inhibitors had a significantly higher proportion of (A) conventional dendritic cells (cDCs) with (B) higher expression of HLA-DR in the inflamed mucosa before treatment compared to nonresponders. cDC values are given as the percentage of cDCs among the lamina propria mononuclear cells and the expression of HLA-DR is shown as the mean fluorescence intensity (MFI) among cDCs. Horizontal lines indicate mean levels.
Predictors of the response to treatment. Inflammatory bowel disease patients who responded to TNFa inhibitors had a significantly higher proportion of (A) conventional dendritic cells (cDCs) with (B) higher expression of HLA-DR in the inflamed mucosa before treatment compared to nonresponders. cDC values are given as the percentage of cDCs among the lamina propria mononuclear cells and the expression of HLA-DR is shown as the mean fluorescence intensity (MFI) among cDCs. Horizontal lines indicate mean levels.

FIGURE 3

ROC curve analysis identified the proportion of conventional dendritic cells as a predictor of the response to TNFa inhibitors. Patients with a proportion of conventional dendritic cells above 7% responded to treatment.
ROC curve analysis identified the proportion of conventional dendritic cells as a predictor of the response to TNFa inhibitors. Patients with a proportion of conventional dendritic cells above 7% responded to treatment.

FIGURE 4

ROC curve analysis of conventional dendritic cell HLA-DR expression in the colonic mucosa before treatment for the prediction of the response to the induction treatment with TNF-α inhibitors. All patients with an HLA-DR MFI above 12450 responded to the treatment.
ROC curve analysis of conventional dendritic cell HLA-DR expression in the colonic mucosa before treatment for the prediction of the response to the induction treatment with TNF-α inhibitors. All patients with an HLA-DR MFI above 12450 responded to the treatment.

Subpopulations of dendritic cells (DCs) in the inflamed inflammatory bowel disease (IBD) mucosa in responders and nonresponders before the treatment with TNFa inhibitors

RespondersNonrespondersp value
IBD
pDC (%)1.9 (0.4)1.3 (0.4)0.3
cDC (%)9.2 (1.0)4.4 (0.8)0.01
CD86 (MFI)1436 (332)785 (177)0.2
HLA-DR (MFI)12152 (868)8838 (1286)0.04
CD103+ (%)51.0 (3.7)42.5 (5.5)0.2
CD103- (%)48.8 (3.8)57.5 (5.5)0.2

Phenotypes of the measured dendritic cells (DC)

AbbreviationPhenotype
Plasmacytoid DCpDCHLA-DR+, CD123+, CD303+, CD11c-, CD3-, CD14-, CD16-, CD19-
Conventional DCcDCHLA-DR+, CD11c+, CD123-, CD303-, CD3-, CD14-, CD16-, CD19-
Mature conventional DCCD86+ DCCD80+, CD86+, CD83+, HLA-DR+, CD11c+, CD123-, CD303-, CD3-, CD14-, CD16-, CD19-
Activated mature conventional DCHLA-DR DCHLA-DRhi, CD83+, CD80+, CD86+, CD11c+, CD123-, CD303-, CD3-, CD14-, CD16-, CD19-
Intestinal CD103+ DCs important in maintaining intestinal immune homeostasisCD103+ DCCD103+, HLA-DR+, CD11c+, CD123-, CD303-, CD3-, CD14-, CD16-, CD19-

Subpopulations of dendritic cells (DCs) in the uninflamed and inflamed inflammatory bowel disease (IBD) mucosa before the treatment with TNFa inhibitors

IBD-uninflamedIBD-inflamedp value
pDC (%)1.7 (0.2)1.7 (0.3)0.9
cDC (%)4.5 (0.6)7.8 (0.9)0.003
CD86 (MFI)1483 (212)1248 (231)0.53
HLA-DR (MFI)11965 (767)10918 (767)0.33
CD103+ (%)57.3 (3.5)47.1 (3.1)0.03
CD103- (%)42.3 (3.4)52.8 (3.2)0.02

Subpopulations of dendritic cells (DCs) in inflamed inflammatory bowel disease (IBD) mucosa before and after the treatment with TNFa inhibitors

IBD-beforeIBD-afterp value
pDC (%)1.7 (0.3)1.3 (0.2)0.32
cDC (%)7.8 (0.9)4.5 (0.9)0.01
CD86 (MFI)1248 (231)826 (219)0.29
HLA-DR (MFI)10918 (767)12141 (616)0.09
CD103+ (%)47.1 (3.1)48.1 (4.5)0.86
CD103- (%)52.8 (3.2)50.7 (4.8)0.75

Clinical, biochemical and endoscopic data of the patients before and after treatment with TNFa inhibitors

Before treatmentAfter treatment
(week 0)(week 12)
ULCERATIVE COLITIS (n = 14)
SCCAI8.4 (0.9)3.1 (0.5)
CRP (mg/l)8.8 (2.9)7.8 (2.4)
Fecal calprotectin (mg/kg)351 (41.7)254 (58.2)
Endoscopic Mayo Score2.4 (0.1)1.5 (0.3)
CROHN’S DISEASE (n = 16)
HBSI9.5 (1.3)3.3 (0.8)
CRP (mg/l)17.5 (3.1)10.5 (3.6)
Fecal calprotectin (mg/kg)341 (40)209 (48)
SES-CD12.9 (1.1)5.5 (1.8)

Demographic data of the patients and healthy controls enrolled in the study

NumberMean
(n)(SD)
Number40
Crohn’s disease16
Female/male8/8
Age (years)38.6
(13.7)
Disease duration (years) Age at diagnosis (years)7.1 (6.5) 31.4
(14.5)
Smokers5
Ex-smokers3
Nonsmokers8
Location of Crohn’s disease16
I. L1 (ileal)
II. L2 (colonic)
III. L3 (ileocolonic)
IV. L4 (isolated upper disease)
Concomitant medications13
I. Aminosalicylates
II. Corticosteroid
III. Azathioprine
IV. Azathioprine + corticosteroids
V. None
Ulcerative colitis14
Female/male8/6
Age (years)39.2 (12)
Disease duration (years)5.6 (2.8)
Age at diagnosis (years)33.5
(11.7)
Smokers1
Ex-smokers3
Nonsmokers10
Extent of ulcerative colitis14
I. E1 (proctitis)
II. E2 (left sided)
II. E3 (extensive)
Concomitant medications14
I. Aminosalicylates
II. Corticosteroid
III. Azathioprine
IV. Azathioprine + corticosteroids
V. None
Healthy controls10
Female6
Male4
58.3
Age (years)(9.4)

Subpopulations of dendritic cells (DC) in the inflamed inflammatory bowel disease (IBD) mucosa and the mucosa of healthy controls (HC) before the treatment with TNFa inhibitors

IBD-inflamedHCp value
pDC (%)1.7 (0.3)0.3 (0.1)0.005
cDC (%)7.8 (0.9)0.5 (0.1)< 0.001
CD86 (MFI)1248 (231)430 (43)0.04
HLA-DR (MFI)10918 (767)11808 (711)0.52
CD103+ (%)47.1 (3.1)66.3 (3.3)0.002
CD103- (%)52.8 (3.2)32.1 (4.1)0.001

Subpopulations of dendritic cells (DCs) in the inflamed ulcerative colitis and Crohn’s disease mucosa in responders and nonresponders before the treatment with TNFa inhibitors

RespondersNonrespondersp value
Ulcerative colitis
pDC (%)2.5 (0.6)1.7 (0.6)0.9
cDC (%)10.1 (1.5)4.7 (1.2)0.04
CD86 (MFI)1595 (523)552 (40)0.2
HLA-DR (MFI)12182 (3613)6693 (3614)0.01
CD103+ (%)61.4 (7.0)34.8 (6.5)0.02
CD103- (%)38.4 (7.1)65.2 (2.7)0.02
Crohn’s disease
pDC (%)1.6 (0.4)0.9 (0.3)0.2
cDC (%)9.7 (1.6)4.2 (1.0)0.04
CD86 (MFI)1452 (434)1019 (335)0.5
HLA-DR (MFI)13152 (1319)10983 (1368)0.3
CD103+ (%)50.8 (4.9)50.2 (9.9)0.9
CD103- (%)49.2 (4.5)49.8 (9.9)0.9
eISSN:
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Langue:
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Sujets de la revue:
Medicine, Clinical Medicine, Internal Medicine, Haematology, Oncology, Radiology