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2017 ; 9
(8
): 2360-2368
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Dynamic expression of transformating growth factor-?1 and caveolin-1 in the lung
of Bleomycin-induced interstitial lung disease
#MMPMID28932540
Xing Y
; Wang L
; Wang H
; Kong X
; Zhan L
J Thorac Dis
2017[Aug]; 9
(8
): 2360-2368
PMID28932540
show ga
BACKGROUND: Interstitial lung disease (ILD) is a disease with high mortality
worldwide. Unfortunately, its prognosis is still very poor. Therefore, developing
the target molecular is very important for ILD diagnosis and treatment.
Caveolin-1 (Cav-1) can regulate the formation of fibrosis by linking to the
signaling pathway of transforming growth factor-?1 (TGF-?1), which is generally
considered to be the most effective approach to solve the problem of ILD.
METHODS: The rat model of ILD was induced by disposable transtracheal injection
of bleomycin hydrochloride. Rats were sacrificed in batches on days 7, 14, 21 and
28 after modeling, and the lung tissues was obtained for histopathological
examination (HE) and Masson staining. Expressions of TGF-?1 and Cav-1 in the
lungs were measured by western blot and real-time polymerase chain reaction
(RT-PCR). RESULTS: Pulmonary inflammation was observed in lung tissue from day 7
after modeling; fibrosis was observed from day 14 after modeling; the collagen
deposition reached the peak on day 21. Significant TGF-?1 up-regulation and Cav-1
down-regulation appeared in the inflammatory phase (7d); TGF-?1 expression level
reached the peak and Cav-1 expression level reached the minimum on day 21-28 with
the most obvious fibrosis. CONCLUSIONS: The rat model of bleomycin induced
pulmonary fibrosis can be used to dynamically observe the progress of ILD. In the
lung tissues from inflammation to fibrosis, TGF-?1 expression was significantly
up-regulated and Cav-1 expression was significantly down-regulated. The
regulation of two protein expressions is closely related to the occurrence and
development of ILD in rats. The regulation of TGF-?1 and Cav-1 expressions and
the balance between the two can be used as a possible target of ILD therapeutic
intervention.