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Table 2 Different mechanisms are involved in stem cell regeneration ability

From: Forthcoming complications in recovered COVID-19 patients with COPD and asthma; possible therapeutic opportunities

In vivo/in vitro or disease models

Type of stem cells

Involving factors

Outcome

Ref

Rat’s acute lung injury

BM-MSCs

Downregulation of inflammatory factors: VEGF, NF-ƘB, and IL-17A

Alleviating lung injury

[152]

Repairing of alveolar type II epithelial cells

Lung progenitor organoid cultures

BM-MSCs

Increasing the number of Epcam + Sca-1 + distal lung epithelial cells

Increased alveolar differentiation to tissue repair

[153]

COPD patients' tissue-derived organoids/A549 cell line

Lung derived MSCs

Downregulation of TGF-β and WNT-5A

Induce generation of alveolar organoids

[154]

Attenuates alveolar epithelial injury

Trigger Epithelial repair

Rat myocardial infarction model

BM-MSCs

Increasing the expression of TGF-β, FGF-2, angiopoietin-2, VEGF-1

Increase in angiogenesis rate

[155]

Induces myocardial regeneration and cardiac function

The 4-week-old female New Zealand white rabbits injured endometrium model

BM-MSCs

Increasing CK-19 expressions

Regulate repair of injured endometrium

[156]

Upregulation of TGF-β1, TGF-β1R, and Smad2 mRNA

Enlarging the number of glands of the endometrial damaged uterus

Downregulation of the expression of TGF-β1 and Smad2 mRNA

Reducing e fibrosis area of the endometrial damaged uterus

Culture of human iPSC-MSCs Bowel disease models in mice

iPSC-MSCs

Multiplying the frequency of CD44+ cells and CBC stem cells (Lgr5+ cells) in colonoids

Promote crypt epithelial cell proliferation via TSG-6

[157]

The expression and secretion of TSG-6 before the coculture with colonoids

Mice DSS (dextran sulfate sodium)-induced colitis model

ESC-MSCs

Decrease of CXCL1, CXCL2, IL-6, and MCP-1 significantly

Ameliorate colon epithelial proliferation and integrity

[158]

Reducing epithelium loss and inflammatory cell infiltration

Encourage the colon epithelial integrity and regeneration

Increase of IGF1R, p-IGF1R, AKT, and p-AKT in the treatment group

Sprague–Dawley rats cutaneous wound healing models

HucMSCs

Increasing B-catenin and its downstream genes (cyclin-D1, cyclin-D3, and N-cadherin)

Promote wound closure of reversible scratches with concomitant treatment

[159]

The induction of b-catenin downstream genes (cyclin-D1, cyclin-D3, and N-cadherin)

Upgrade the phosphorylation of GSK3b and inhibited the activity of GSK3b