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. 2015 Nov;8(2):170-80.
doi: 10.15283/ijsc.2015.8.2.170.

Therapeutic Effect of Adipose Derived Stem Cells versus Atorvastatin on Amiodarone Induced Lung Injury in Male Rat

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Therapeutic Effect of Adipose Derived Stem Cells versus Atorvastatin on Amiodarone Induced Lung Injury in Male Rat

Gihan Ibrahim Aboul-Fotouh et al. Int J Stem Cells. 2015 Nov.

Abstract

Background and objectives: Amiodarone (AM), a class 3 antiarrhythmic drug, has been associated with variety of adverse effects, the most serious of which is pulmonary toxicity. Ator (A) is a statin, known for their immunomodulatory and anti-inflammatory activities. Recent studies provide evidence of potential therapeutic effect of statins on lung injury. Adipose derived stem cells (ADSCs) have shown great promise in the repair of various tissues. The present study aimed at investigating and comparing the possible therapeutic effect of A and ADSCs on AM induced lung injury in albino rats.

Methods and results: 34 adult male albino rats were divided into 5 groups: control group (Gp I), A group (Gp II) received 10 mg/kg of A orally 6 days (d)/week (w) for 4 weeks (ws), AM group (Gp III) received 30 mg/kg of AM orally 6 d/w for 4 ws, AM&A group (Gp IV) received AM for 4ws then A for other 4 ws and AM&SCs group (Gp V) received AM for 4 ws then injected with 0.5 ml ADSCs on 2 successive days intravenously (IV). Histological, histochemical, immunohistochemical and morphometric studies were performed. Group III displayed bronchiolitis obliterans, thickened interalveolar septa (IAS) and thickened vascular wall which were proven morphometrically. Increased area% of collagen fibers and apoptotic changes were recorded. All findings regressed on A administration and ADSCs therapy.

Conclusion: Ator proved a definite ameliorating effect on the degenerative, inflammatory, apoptotic and fibrotic changes induced by AM. ADSCs administration denoted more remarkable therapeutic effect compared to A.

Keywords: ADSCs; Amiodarone; Ator; Lung.

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Figures

Fig. 1
Fig. 1
Lung sections of control rats (H&E) showing (A): a bronchiole (B), a venule (V), an arteriole (ar), alveoli (a), alveolar sacs (A) and IAS (I) (×100), (B): a blood vessel (V) and a bronchiole (B) lined by columnar cells and Clara cells ( formula image) (×400) (C): alveoli (a) lined mainly by type I pneumocytes ( formula image). Note few type II pneumocytes ( formula image) and pulmonary capillaries (c) (×1000). Lung sections in Gp III (H&E) showing (D): obvious thickening of multiple IAS ( formula image), a distorted bronchiole ( formula image) and partial thickening of the wall of a venule ( formula image) (×100), (E): two peribronchial mononuclear aggregates, (MA1) and (MA2). Note obvious thickening of the wall of a vessel ( formula image) (×100) (F): stratification of the lining epithelium ( formula image), shed cellular debris ( formula image) in the lumen of a bronchiole, a congested vessel (c). Note the lining cells with dark nuclei ( formula image) (×400). (G): thickened IAS harboring multiple fibroblasts (F) surrounded by collagen deposition (*). Note multiple infiltrating cells ( formula image) (H): multiple type II pneumocytes ( formula image) and few type I pneumocytes ( formula image). Note shed cells (*) (×1000).
Fig. 2
Fig. 2
Rat lung sections in Gp IV (H&E) showing (A): 2 bronchioles with few shed epithelial cells (*) in their lumens and thickening of some IAS ( formula image) (×100), (B): focal stratification of the bronchiolar lining epithelium ( formula image) and few shed cells (*) (×400) (C): numerous type I pneumocytes ( formula image) and fewer type II pneumocytes ( formula image) (×1000). In Gp V showing (D): a bronchiole with few shed epithelial cells in the lumen (*) and few thickened IAS ( formula image). Note a congested vessel (c) (×100), (E): multiple spindle cells (S) in the lumen of a vessel. Note partial thickening ( formula image) of its wall and few round infiltrating cells in the IAS ( formula image) (×400) and (F): numerous type I pneumocytes ( formula image) and fewer type II pneumocytes ( formula image) (×1000).
Fig. 3
Fig. 3
(A): Lung sections in Gp I showing fine collagen fibers in the IAS ( formula image), in the adventitia of a bronchiole ( formula image) and that of a venule ( formula image). (B): In Gp III showing dense collagen fibers deposition in thickened IAS ( formula image), around bronchioles ( formula image) and around congested blood vessels ( formula image). (C): In Gp IV showing minimal collagen fibers in the IAS ( formula image), the adventitia of a bronchiole ( formula image) and that of a vessel ( formula image). (D): In Gp V showing minimal collagen fibers in the IAS ( formula image), the adventitia of a bronchiole ( formula image) and that of a vessel ( formula image). (Masson’s trichrome, ×200).
Fig. 4
Fig. 4
(A): In Gp I showing −ve staining with Pb in a bronchiole (B), alveoli and IAS. In Gp V showing (B): multiple Pb +ve cells surrounding ( formula image) and inside ( formula image) a congested blood vessel (c), (C): multiple Pb +ve cells ( formula image) in thickened IAS (Pb, ×400).
Fig. 5
Fig. 5
Caspase 3 immunostaining (×400) lung sections (A): in Gp I showing an immunostained +ve cell among the epithelial lining of an alveolus ( formula image) and another +ve cell in the lining of a bronchiole ( formula image) (B): In Gp III showing multiple +ve cells in the epithelial lining of alveoli, alveolar sacs ( formula image) and in thickened IAS ( formula image) (C): In GP IV showing few +ve cells in the lining epithelium ( formula image) of 2 alveoli, alveolar sac and in 2 IAS ( formula image). (D): In GP V showing few +ve cells in the lining epithelium ( formula image) and adventitia (*) of a bronchiole. Note a +ve cell in the lining epithelium of an alveolus ( formula image). CD44 immunostaining (×400) lung sections (E): in Gp I showing −ve CD44 immunostaining among the epithelium lining a bronchiole, alveoli and alveolar sacs. (F): In Gp III showing few CD44 +ve spindle cells in obviously thickened IAS ( formula image) (G): In Gp IV showing multiple +ve spindle cells in thickened IAS ( formula image). (H): In Gp V showing multiple +ve cuboidal cells (C) and +ve spindle cells (S) among the epithelial lining of alveoli and alveolar sacs.
Fig. 6
Fig. 6
Histogram comparing (A): the mean values of thickness of IAS in the control and experimental groups, (B): the mean values of thickness of wall of blood vessels in the control and experimental groups, (C): the mean values of area % of collagen fibers in the control and experimental groups, (D): the mean values of area % of caspase 3 +ve cells in the control and experimental groups, (E): the mean values of area % of CD44 +ve cells in the control and experimental groups.

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