Intravenous Injection of Human Umbilical Cord Mesenchymal Stem Cells Can Alleviate Acute Lung Injury in Rats

Area of Science:

• Regenerative Medicine
• Cell Therapy
• Pulmonology

Background:

• Acute Lung Injury (ALI) is a critical condition with significant morbidity and mortality.
• Current treatments for ALI are limited, necessitating novel therapeutic strategies.
• Investigating the potential of stem cell therapy for ALI is crucial.

Purpose of the Study:

• To evaluate the therapeutic efficacy of intravenous human umbilical cord mesenchymal stem cells (hUCMSCs) in a rat model of ALI.
• To elucidate the underlying mechanisms, including anti-inflammatory effects and barrier protection, of hUCMSC treatment in ALI.

Main Methods:

• An ALI animal model was established in Wistar albino rats using intravenous oleic acid injection.
• Rats received low-dose (2.5×10^5) or high-dose (5×10^5) hUCMSCs intravenously.
• Lung injury assessment included lung coefficient, histology, inflammatory cytokine levels (TNF-α, IL-1β, IL-4, IL-6, IL-10), and tight junction protein expression (Claudin-5, Occludin, ZO-1).

Main Results:

• Oleic acid-induced ALI resulted in increased lung injury, elevated pro-inflammatory cytokines, and decreased anti-inflammatory cytokines and tight junction proteins.
• hUCMSC treatment significantly reduced lung injury scores and lung coefficient compared to the model group.
• MSC treatment led to decreased TNF-α, IL-1β, IL-6, increased IL-4, IL-10, and restored expression of Claudin-5, Occludin, and ZO-1.

Conclusions:

• hUCMSCs demonstrate significant therapeutic potential in ameliorating oleic acid-induced ALI in rats.
• The protective effects are attributed to hUCMSCs' immunomodulatory properties and ability to restore alveolar-capillary barrier integrity.
• hUCMSC therapy offers a promising strategy for ALI treatment by reducing inflammation and enhancing lung barrier function.