Abstract:
BACKGROUND:Transforming growth factor-beta1 (TGF-beta1) exerts strong fibrogenic potential in culture-activated HSCs. Smad4 is a key intracellular mediator for the transforming growth factor-beta (TGF-beta) superfamily of growth factors. The aim of this study was to assess the effects of the antisense Smad4 gene on Ito cell line, LI90. METHODS:The recombinant retroviral vector pLXSN-Smad4 was constructed by cloning the rat antisense Smad4 cDNA into the retroviral vector pLXSN. Retroviruses with or without the antisense gene were obtained by transfecting pLXSN-Smad4 and pLXSN vectors into PA317 cells. Human hepatic stellate cells (HSCs) LI90 were infected with these retroviruses followed by selection with G418. The expression of Smad4 was detected by Northern and Western blots. Cell biological characteristics, including cell growth curve, 3H-TdR and 3H-proline uptake by HSCs and the production of extracellular matrix were assessed. RESULTS:mRNA and protein expressions of Smad4 in LI90 cells transfected with retrovirus containing the antisense Smad4 gene were much lower than those in LI90 cells transfected with empty vector or parental LI90 cells. Cells hypoexpressing the Smad4 gene exhibited a slower rate of growth, a lower uptake of 3H-TdR and 3H-proline (P < 0.01), and smaller production of th extracellular matrix, compared with parental LI90 cells and cells transfected with empty retrovirus. CONCLUSIONS:The antisense Smad4 gene can suppress the expression of the Smad4 gene, reduce endogenous production of Smad4 mRNA and protein, block TGF-beta1 signaling pathway, inhibit activation of Ito cells, obstruct the growth of Ito cells, decrease the production of the extracellular matrix (ECM). Our results may provide a basis for the development of antifibrotic gene therapy.
journal_name
Chin Med J (Engl)journal_title
Chinese medical journalauthors
Xu XB,Leng XS,He ZP,Liang ZQ,Lin K,Wei YH,Yu X,Peng JRkeywords:
subject
Has Abstractpub_date
2004-08-01 00:00:00pages
1170-7issue
8eissn
0366-6999issn
2542-5641journal_volume
117pub_type
杂志文章abstract:BACKGROUND:The SYNergy between percutaneous coronary intervention with TAXus and cardiac surgery Score II (SS-II) can well predict 4-year mortality in patients with complex coronary artery disease (CAD), and guide decision-making between coronary artery bypass graft surgery and percutaneous coronary intervention (PCI)....
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.162510
更新日期:2015-08-20 00:00:00
abstract:BACKGROUND:Over the years, the mechanical ventilation (MV) strategy has changed worldwide. The aim of the present study was to describe the ventilation practices, particularly lung-protective ventilation (LPV), among brain-injured patients in China. METHODS:This study was a multicenter, 1-day, cross-sectional study in...
journal_title:Chinese medical journal
pub_type: 杂志文章,多中心研究
doi:10.4103/0366-6999.185869
更新日期:2016-07-20 00:00:00
abstract:BACKGROUND:The In1.1C single nucleotide polymorphism (SNP) allele results in reduced RANTES transcription, which is associated with increased frequency of HIV-1 infection, and rapid progression to AIDS among HIV-1-infected individuals. This study aimed to study the mutant frequency and polymorphism of RANTES in Chinese...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2009-05-20 00:00:00
abstract:OBJECTIVE:To investigate the role of bax in a vincristine (VCR)-induced multidrug-resistant (MDR) human gastric cancer cell line, SGC7901/VCR, in which the Bax protein expression level was significantly lower compared with that in parent cells. METHODS:A bax eukaryotic expression vector was constructed and transfected...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2000-11-01 00:00:00
abstract:BACKGROUND:Few literatures pertain to the 16S ribosomal DNA (16S rDNA) analysis of bacteria contributing to primary and persistent endodontic lesions, with no information available for the Chinese population. As such, we investigated endodontic bacteria associated with primary and persistent endodontic lesions in adult...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2013-02-01 00:00:00
abstract:BACKGROUND:Colorectal cancer (CRC) is a heterogeneous disease; current research relies on cancer cell lines and animal cancer models, which may not precisely imitate inner human tumors and guide clinical medicine. The purpose of our study was to explore and further improve the process of producing three-dimensional (3D...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.191782
更新日期:2016-10-20 00:00:00
abstract:BACKGROUND:Prostate specific membrane antigen (PSMA) can facilitate the growth, migration, and invasion of the LNCaP prostate cancer cell lines, but the underlying molecular mechanisms have not yet been clearly defined. Here, we investigated whether PSMA serves as a novel regulator of the phosphatidylinositol 3-kinase ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2014-01-01 00:00:00
abstract::This paper reports the results of serological survey of 318,912 persons for nasopharyngeal carcinoma (NPC) in 21 cities and counties of south China. There were 8,441 persons with positive VCA-IgA antibody (single item positive) of EB virus (EBV), with a rate of 2.65%. In these VCA-IgA positive persons, 287 persons als...
journal_title:Chinese medical journal
pub_type: 杂志文章,多中心研究
doi:
更新日期:1995-04-01 00:00:00
abstract::Temporary arterial occlusion during intracranial aneurysm surgery is a safe and effective modality. It is not only an emergency measure for controlling aneurysmal bleeding, but also a helpful means for accurate and meticulous dissection and clipping of an intracranial aneurysm with the advantage of minimizing the chan...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1993-11-01 00:00:00
abstract:BACKGROUND:Myocardial protection during off-pump coronary artery bypass grafting (OPCABG) is a multifactorial problem in which maintaining stable systemic hemodynamics is very important. In this study passive graft perfusion (PGP) was applied to investigate the effect during and after OPCABG as evaluated by cardiac tro...
journal_title:Chinese medical journal
pub_type: 杂志文章,随机对照试验
doi:
更新日期:2007-02-05 00:00:00
abstract:OBJECTIVE:5-Fluorouracil (5-FU)-based combination therapies are standard treatments for gastrointestinal cancer, where the modulation of autophagy is becoming increasingly important in offering effective treatment for patients in clinical practice. This review focuses on the role of autophagy in 5-FU-induced tumor supp...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:10.4103/0366-6999.176069
更新日期:2016-02-20 00:00:00
abstract:OBJECTIVE:Sepsis remains a leading cause of death in many Intensive Care Units worldwide. Immunosuppression has been a primary focus of sepsis research as a key pathophysiological mechanism. Given the important role of the negative costimulatory molecules programmed cell death-1 (PD-1) and programmed death-ligand 1 (PD...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:10.4103/0366-6999.204113
更新日期:2017-04-20 00:00:00
abstract::The environment structure of natural nidi and epidemic areas of hemorrhagic fever with renal syndrome (HFRS) possesses characteristics of topography, hydrology, climate, soil, vegetation, and animals. The natural nidi and epidemic areas of HFRS are distributed mainly in plain and hilly regions under 500 meters above t...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1994-02-01 00:00:00
abstract:BACKGROUND:There are few reports of microsurgical treatment of dorsum sellae meningiomas-which, because of location, size, and differences in growth direction, clinical presentations, degree of surgical difficulty, have varied posttreatment sequelae. In pursuit of an optimal microsurgical treatment option for dorsum se...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2009-08-20 00:00:00
abstract:OBJECTIVE:The purpose of this study was to demonstrate the lumbar pedicle cortical bone trajectory (CBT) screw fixation technique, a new fixation technique for lumbar surgery. DATA SOURCES:The data analyzed in this review are mainly from articles reported in PubMed published from 1994 to 2014. STUDY SELECTION:Origina...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:Trocar-site hernia (TSH) is a serious complication after laparoscopic procedures. Although it is a rare entity, it can have life-threatening consequences. This study aimed to retrospectively analyze the potential associated factors for TSH following gynecologic laparoscopy and summarize prevention strategies...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000510
更新日期:2019-11-20 00:00:00
abstract::The effects of hypoxic endothelial cell conditioned medium (HECCM) on proliferation and collagen synthesis of cultured porcine pulmonary arterial smooth muscle cells (PASMCs) were studied by 3H-thymidine (3H-TdR) and 3H-proline incorporations, image analysis for determination of DNA content and colorimetric assay usin...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1995-11-01 00:00:00
abstract:BACKGROUND:Surgical resection is generally considered the main curative treatment for intrahepatic biliary cystadenocarcinoma (IBCA) or suspected IBCAs, but controversy exists regarding the prognosis for IBCAs. This study aimed to describe the clinicopathological characteristics of IBCA and identify prognostic factors ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.156108
更新日期:2015-05-05 00:00:00
abstract:BACKGROUND:In many studies, obstructive sleep apnea (OSA) has been shown to be an independent risk factor for cardiovascular disease. Conversely, there are few reports establishing possible relation between OSA and venous thromboembolism (VTE). In this study, the aim is to evaluate OSA via polysomnography in patients w...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2012-10-01 00:00:00
abstract:BACKGROUND:Spinal cord injury (SCI) is a worldwide medical concern. This study aimed to elucidate the mechanism underlying the protective effect of hyperbaric oxygen (HBO) against SCI-induced neurologic defects in rats via exploring the stromal cell-derived factor-1 (SDF-1)/CXC chemokine receptor 4 (CXCR4) axis and exp...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.1097/CM9.0000000000000115
更新日期:2019-03-20 00:00:00
abstract:BACKGROUND:Laser in situ keratomileusis (LASIK) has become an efficient and commonly performed procedure to reduce refractive errors. In order to further increase the postoperative visual quality, the wavefront-guided refractive surgery has been a research hotspot in customized surgery. This study was conducted to comp...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2008-01-20 00:00:00
abstract:BACKGROUND:Stenting a bifurcation lesion is technically challenging. No study has reported the clinical outcome of a dedicated bifurcation stent in China. We aimed to analyze the safety and clinical outcome of a novel side branch ostial stent (BIGUARD) stent in treating coronary bifurcation lesions. METHODS:Forty-seve...
journal_title:Chinese medical journal
pub_type: 临床试验,杂志文章
doi:
更新日期:2009-09-20 00:00:00
abstract:BACKGROUND:Receptor activator of nuclear factor kappa B (NF-κB) ligand (RANKL) and osteoprotegerin (OPG) have been recently shown to play important roles in bone resorption. The aim of this study was to investigate the possible association between the expression of bone resorption regulators (RANKL and OPG) and inflamm...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2011-07-01 00:00:00
abstract:OBJECTIVE:To study the mode of presentation, the tumor, nodes, metastasis (TNM) staging and the efficacy of multimodal treatment of breast cancer among Chinese women treated in Queen Mary Hospital. METHODS:The available records of all breast cancer patients treated between January 1980 and December 1994 were reviewed....
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1997-06-01 00:00:00
abstract:BACKGROUND:Few clinical studies or randomized clinical trial results have reported the impact of fast track surgery on postoperative insulin sensitivity. This study aimed to investigate the effects of fast track surgery on postoperative insulin sensitivity in patients undergoing elective open colorectal resection. MET...
journal_title:Chinese medical journal
pub_type: 杂志文章,随机对照试验
doi:
更新日期:2012-09-01 00:00:00
abstract:BACKGROUND:Studies have shown that abnormal activation of the sonic hedgehog pathway is closely related to tumorigenesis in central nervous system. This study aimed to investigate the role of the sonic hedgehog signaling pathway in the occurrence of brainstem and supratentorial glioma. METHODS:Real-time quantitative r...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2011-11-01 00:00:00
abstract:BACKGROUND:The tibial plateau is asymmetric with a larger medial plateau. We observed from clinical practice that the shape of the tibial plateau does not always present a larger medial plateau. Tibial plateau also showed other shapes. The purpose of this study was to analyze the anthropometric data of the proximal tib...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:Laparoendoscopic single-site surgery radical prostatectomy (LESS-RP) is a challenging urological procedure and needs to be further evaluated. This study was undertaken to illustrate the safety and initial results of pure LESS-RP with conventional available instruments. METHODS:A prospective clinical databas...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2012-11-01 00:00:00
abstract:BACKGROUND:Menopausal symptoms and sleep difficulty were physiological processes that were affected by genetic and other factors. This study was to investigate the prevalence of menopausal symptoms and sleep quality in menopausal transition (MT) and postmenopause (PM) women in Taiyuan, Shanxi. METHODS:A community-base...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.178961
更新日期:2016-04-05 00:00:00
abstract::Twenty-one patients, under 6 years of age, with root avulsion of the brachial plexus were treated from 1975 to 1987. Among them, 9 had root avulsion of the upper trunk, 2 root avulsion of the lower trunk with middle trunk broken, and 10 root avulsion of the whole brachial plexus. Follow-up of 16 patients showed excell...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1990-05-01 00:00:00