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Journal of Chinese Integrative Medicine: Volume 10, 2012   Issue 2,  Pages: 200-209

DOI: 10.3736/jcim20120211
Original Experimental Research
Preventive effects of Citrus reticulata essential oil on bleomycin-induced pulmonary fibrosis in rats and the mechanism
1. Xian-mei Zhou (Department of Respiratory Diseases, Jiangsu Province Hospital of Traditional Chinese Medicine, Nanjing 210029, Jiangsu Province, China E-mail: zhouxianmeijs@yahoo.com.cn)
2. Yang Zhao (Department of Respiratory Diseases, Jiangsu Province Hospital of Traditional Chinese Medicine, Nanjing 210029, Jiangsu Province, China )
3. Cui-cui He (State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, China )
4. Jian-xin Li (State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, China )
OBJECTIVE: To investigate the effects of essential oil of Citrus reticulata (EOCR) on proliferation of human embryonic lung fibroblasts (HELFs), and to explore its protective effects on bleomycin (BLM)-induced lung fibrosis in rats.
METHODS: Routinely cultured HELFs during the logarithmic phase of growth were divided into control and treated groups, and applied for evaluation of inhibitory activity using methylthiazol tetrazolium (MTT) assay. A rat model of BLM-induced pulmonary fibrosis was used for the evaluation of antifibrotic effect of EOCR. Forty-two Sprague-Dawley rats were randomly divided into normal group, model group, prednisone group and different doses of EOCR groups. BLM was intratracheally instilled into all the rats except those in the normal group, and EOCR was orally given to BLM-treated rats at doses of 25, 50, 100 and 200 mg/kg once per day for four weeks. The rats in the normal group were intratracheally administered the same volume of saline. On the 28th day, rats were sacrificed under anesthesia, and the serum and lung tissues were collected. Superoxide dismutase (SOD) activities and malondialdehyde (MDA) contents in serum and lung tissues were analyzed with corresponding kits; type Ⅰ collagen (Col Ⅰ) content in lung tissues was evaluated with enzyme-linked immunosorbent assay; pulmonary fibrosis was assessed by lung histology; protein and mRNA expressions of connective tissue growth factor (CTGF) in lung tissues were measured with immunohistochemical and in situ hybridization semiquantitative image analyses, respectively.
RESULTS: The EOCR at different concentrations displayed inhibitory activity on proliferation of HELFs. In in vivo experiment, the weight gain of the rats in groups treated with EOCR at doses of 50, 100 and 200 mg/kg per day was significantly higher than those in the model group at the 7th, 14th, 21st and 28th day (P<0.05 or P<0.01). The scores of alveolitis and pulmonary fibrosis in the groups treated with EOCR at doses of 100 and 200 mg/kg per day were significantly lower than those in the model group (P<0.01); the SOD levels in serum and pulmonary tissues of the EOCR (50, 100 and 200 mg/kg) groups were markedly increased compared with the model group (P<0.01 ), while the MDA levels in both serum and pulmonary tissues were markedly reduced (P<0.05); the Col Ⅰ level in pulmonary tissues of the EOCR (100 and 200 mg/kg per day) groups were markedly lower than that of the model group (P<0.01); the protein and mRNA expressions of CTGF in the groups treated with EOCR at doses of 100 and 200 mg/kg per day were down-regulated compared with the model group (P<0.01).
CONCLUSION: The results indicate that EOCR has preventive effects on BLM-induced pulmonary fibrosis in rats. The mechanism may be via adjusting the unbalance of oxidation and antioxidation, down-regulating CTGF protein and mRNA expressions, and reducing collagen deposition and fibrosis.
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Please cite this article as:
Zhou XM, Zhao Y, He CC, Li JX. Preventive effects of Citrus reticulata essential oil on bleomycin-induced pulmonary fibrosis in rats and the mechanism. J Chin Integr Med / Zhong Xi Yi Jie He Xue Bao. 2012; 10(2): 200-209.
References:
1Han MK, Swigris J, Liu L, Bartholmai B, Murray S, Giardino N, Thompson B, Frederick M, Li D, Schwarz M, Limper A, Flaherty K, Martinez FJ. Gender influences Health-Related Quality of Life in IPF[J].Respir Med, 2010, 104(5): 724-730.  
2Agarwal R, Jindal SK. Acute exacerbation of idiopathic pulmonary fibrosis: a systematic review[J].Eur J Intern Med, 2008, 19(4): 227-235.  
3Bringardner BD, Baran CP, Eubank TD, Marsh CB. The role of inflammation in the pathogenesis of idiopathic pulmonary fibrosis[J].Antioxid Redox Signal, 2008, 10(2): 287-301.  
4Harari S, Caminati A. IPF: new insight on pathogenesis and treatment[J].Allergy, 2010, 65(5): 537-553.  
5Parra ER, Kairalla RA, Ribeiro de Carvalho CR, Eher E, Capelozzi VL. Inflammatory cell phenotyping of the pulmonary interstitium in idiopathic interstitial pneumonia[J].Respiration, 2007, 74(2): 159-169.  
6Dempsey DJ. Clinical review: Idiopathic pulmonary fibrosis — past, present and future[J].Respir Med, 2006, 100(11): 1871-1885.  
7Gomer RH, Lupher ML Jr. Investigational approaches to therapies for idiopathic pulmonary fibrosis[J].Expert Opin Investig Drugs, 2010, 19(6): 737-745.  
8Yang J, Cui Y, Kolb M. How useful is traditional herbal medicine for pulmonary fibrosis?[J].Respirology, 2009, 14(8): 1082-1091.  
9Jiang HD, Guan HS. MS80, a novel sulfated oligosaccharide, inhibits pulmonary fibrosis by targeting TGF-beta1 both in vitro and in vivo[J].Acta Pharmacol Sin, 2009, 30(7): 973-979.  
10Zhou XM, Zhang GC, Li JX, Hou J. Inhibitory effects of citrus extracts on the experimental pulmonary fibrosis[J].J Ethnopharmacol, 2007, 111(2): 255-264.  
11Zhou XM, Huang MM, He CC, Li JX. Inhibitory effects of citrus extracts on the experimental pulmonary fibrosis[J].J Ethnopharmacol, 2009, 126(1): 143-148.  
12Peterson JJ, Dwyer JT, Beecher GR, Bhagwat SA, Gebhardt SE, Haytowitz DB, Holden JM. Flavanones in oranges, tangerines (mandarins), tangors, and tangelos: a compilation and review of the data from the analytical literature[J].J Food Compost Anal, 2006, 19(Suppl): S66-S73.  
13Yu L, Li X, Liu S, Xu G, Liang Y. Comparative analysis of volatile constituents in Citrus reticulata Blanco using GC-MS and alternative moving window factor analysis[J].J Sep Sci, 2009, 32(20): 3457-3465.  
14Xu P. Comparison of pharmacological effects in water extract and essential oil of Citrus reticulata[J].Jiangxi Zhong Yi Xue Yuan Xue Bao, 1998, 10(4): 172-173. Chinese
15China Pharmacopoeia Commission. Pharmacopoeia of the People’s Republic of China (part one). 2005 ed[M]. Beijing: Chemical Industry Press, 2005. 53. Chinese
16Szapiel SV, Elson NA, Fulmer JD, Hunninghake GW, Crystal RG. Bleomycin-induced interstitial pulmonary disease in the nude, athymic mouse[J].Am Rev Respir Dis, 1979, 120(4): 893-839.  
17Ohkawa H, Ohishi N, Yagi K. Assay for lipid peroxides in animal tissues by thiobarbituric acid reaction[J].Anal Biochem, 1979, 95(2): 351-358.  
18Oyanagui Y. Reevaluation of assay methods and establishment of kit for superoxide dismutase activity[J].Anal Biochem, 1984, 142(2): 290-296.  
19Kohyama T, Yamauchi Y, Takizawa H, Itakura S, Kamitani S, Kato J, Nagase T. Clarithromycin inhibits fibroblast migration[J].Respir Med, 2008, 102(12): 1769-1776.  
20Chua F, Gauldie J, Laurent GJ. Pulmonary fibrosis: searching for model answers[J].Am J Respir Cell Mol Biol, 2005, 33(1): 9-13.  
21Moeller A, Ask K, Warburton D, Gauldie J, Kolb M. The bleomycin animal model: a useful tool to investigate treatment options for idiopathic pulmonary fibrosis?[J].Int J Biochem Cell Biol, 2008, 40(3): 362-382.  
22Gharaee-Kermani M, Ullenbruch M, Phan SH. Animal models of pulmonary fibrosis[J].Methods Mol Med, 2005, 117: 251-259.  
23Gao F, Kinnula VL, Myllrniemi M, Oury TD. Extracellular superoxide dismutase in pulmonary fibrosis[J].Antioxid Redox Signal, 2008, 10(2): 343-354.  
24Boyaci H, Maral H, Turan G, Bayiit , Dilliolugil M, Yildiz F, Tugay M, Pala A, Erin C. Effects of erdosteine on bleomycin-induced lung fibrosis in rats[J].Mol Cell Biochem, 2006, 281(1-2): 129-137.  
25Cairns JA, Walls AF. Mast cell tryptase stimulates the synthesis of type Ⅰ collagen in human lung fibroblasts[J].J Clin Invest, 1997, 99(6): 1313-1321.  
26Kothapalli D, Frazier KS, Welply A, Segarini PR, Grotendorst GR. Transforming growth factor beta induces anchorage-independent growth of NRK fibroblasts via a connective tissue growth factor-dependent signaling pathway[J].Cell Growth Differ, 1997, 8(1): 61-68.  
27Scotton CJ, Chambers RC. Molecular targets in pulmonary fibrosis: the myofibroblast in focus[J].Chest, 2007, 132(4): 1311-1321.  
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