Background: Mesenchymal stem cells (MSCs) are a well-established immunosuppressive agent which can also promote tissue repair and regeneration. Recent studies have demonstrated MSCs as a novel therapeutic for inflammatory bowel disease (IBD), a chronic idiopathic inflammatory disorder of the gastrointestinal tract. However, the precise role of MSCs in regulating immune-responses is controversial, and its significance in the pathogenesis of IBD uncertain. In addition, MSCs’ acellular product, extracellular vesicles (EVs), may also play an important role in the armamentarium of therapeutics, but how EVs compare to MSCs remains undefined due to the lack of side-by-side comparative investigation. We herein compared MSCs and their associated EVs side-by-side using a DSS-induced colitis model.
Methods: A DSS-induced colitis model was used. At Day 4, mice received adipose derived MSCs, MSC derived EVs, or placebo. Weight loss, stool consistency and hematochezia was charted. At day 8, murine colons were harvested, histologic analysis performed, and serum/tissue cytokine analysis conducted.
Results: MSCs and EVs demonstrated equivalent immunosuppressive functions with DSS-treated mice through decreased colonic lymphocyte infiltration and attenuated disease severity after both MSC and EV treatment. Furthermore, both MSCs and EVs have an equivalent ability to inhibit inflammation in the DSS colitis model.
Conclusions: These results suggest that (i) both MSCs and EVs are effective therapeutic candidates for a DSS-induced mouse colitis model, (ii) MSCs and EVs have similar immunosuppressive and anti-inflammatory functions, and (iii) EVs may present a novel future therapeutic for the treatment of IBD.

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On 08 Nov, 2020
On 08 Nov, 2020
On 08 Nov, 2020
On 08 Nov, 2020
Received 18 Oct, 2020
On 15 Oct, 2020
Invitations sent on 12 Oct, 2020
On 11 Oct, 2020
On 10 Oct, 2020
On 10 Oct, 2020
Posted 03 Sep, 2020
On 21 Sep, 2020
Received 20 Sep, 2020
On 09 Sep, 2020
On 06 Sep, 2020
Received 05 Sep, 2020
On 05 Sep, 2020
Received 05 Sep, 2020
Invitations sent on 04 Sep, 2020
On 04 Sep, 2020
On 03 Sep, 2020
On 02 Sep, 2020
On 02 Sep, 2020
On 31 Aug, 2020
On 08 Nov, 2020
On 08 Nov, 2020
On 08 Nov, 2020
On 08 Nov, 2020
Received 18 Oct, 2020
On 15 Oct, 2020
Invitations sent on 12 Oct, 2020
On 11 Oct, 2020
On 10 Oct, 2020
On 10 Oct, 2020
Posted 03 Sep, 2020
On 21 Sep, 2020
Received 20 Sep, 2020
On 09 Sep, 2020
On 06 Sep, 2020
Received 05 Sep, 2020
On 05 Sep, 2020
Received 05 Sep, 2020
Invitations sent on 04 Sep, 2020
On 04 Sep, 2020
On 03 Sep, 2020
On 02 Sep, 2020
On 02 Sep, 2020
On 31 Aug, 2020
Background: Mesenchymal stem cells (MSCs) are a well-established immunosuppressive agent which can also promote tissue repair and regeneration. Recent studies have demonstrated MSCs as a novel therapeutic for inflammatory bowel disease (IBD), a chronic idiopathic inflammatory disorder of the gastrointestinal tract. However, the precise role of MSCs in regulating immune-responses is controversial, and its significance in the pathogenesis of IBD uncertain. In addition, MSCs’ acellular product, extracellular vesicles (EVs), may also play an important role in the armamentarium of therapeutics, but how EVs compare to MSCs remains undefined due to the lack of side-by-side comparative investigation. We herein compared MSCs and their associated EVs side-by-side using a DSS-induced colitis model.
Methods: A DSS-induced colitis model was used. At Day 4, mice received adipose derived MSCs, MSC derived EVs, or placebo. Weight loss, stool consistency and hematochezia was charted. At day 8, murine colons were harvested, histologic analysis performed, and serum/tissue cytokine analysis conducted.
Results: MSCs and EVs demonstrated equivalent immunosuppressive functions with DSS-treated mice through decreased colonic lymphocyte infiltration and attenuated disease severity after both MSC and EV treatment. Furthermore, both MSCs and EVs have an equivalent ability to inhibit inflammation in the DSS colitis model.
Conclusions: These results suggest that (i) both MSCs and EVs are effective therapeutic candidates for a DSS-induced mouse colitis model, (ii) MSCs and EVs have similar immunosuppressive and anti-inflammatory functions, and (iii) EVs may present a novel future therapeutic for the treatment of IBD.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7
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