Abstract:
OBJECTIVE:To investigate an method for hepatic differentiation from embryonic stem cells (ES cells) in vitro and the resulting differentiation ratio, in order to develop a procedure for producing a new type of hepatocyte for hepatocyte replacement therapy in the treatment of liver failure. METHODS:ES cells from Balb/C mice were cultured and maintained in an undifferentiated state in gelatin-coated dishes using Dulbecco's modified Eagle's medium (DMEM) containing 1000 U/ml leukemia inhibitory factor (LIF). Then, LIF was withdrawn from the DMEM to allow the ES cells to develop into embryonic bodies (EBs). EBs were plated onto tissue culture dishes, and growth factors such as acidicfibroblast growth factor (aFGF) and hepatocyte growth factor (HGF) were added to the medium to promote directional differentiation. The course of development and differentiation was observed dynamically using an inversion microscope. The expression of hepatic proteins, such as alpha-fetoprotein (AFP), albumin (ALB), cytokeratin 8 (CK8), cytokeratin 18 (CK18), in cytoplasm was analyzed by immunocytochemistry (ICC). The concentration of ALB in the medium was determined dynamically by radioimmunoassay (RIA). RESULTS:ES cells replicated as clones, without differentiating, in DMEM containing LIF. They developed into EBs in medium without LIF. Our ICC assay showed that differentiating cells did not express hepatic proteins, such as AFP, ALB, CK8, and CK18 until day 7, day 9, day 11, and day 11, respectively (up to 2 days later when growth factors are not present). The concentration of AFP in the medium was first detected on day 8, at a concentration of 3.4 ng/ml, and increased to 22.8 ng/ml by day 15. The concentration of ALB in the medium was 0.2 micro g/ml on day 11, and increased to 2.2 micro g/ml by day 15. ALB-positive cells under ICC manifest morphological structures were consistent with normal mouse hepatocytes. The differentiation ratio of hepatocytes in the ES cell differentiation system was 30% on day 15 (significantly lower without the presence of growth factors). CONCLUSIONS:ES cells can differentiate into mature hepatocytes. Growth factors, such as aFGF and HGF, can enhance this differentiation and produce sufficient numbers of functional hepatocytes. This method may be a reliable new way of differentiating ES cells into hepatocytes for use in replacement therapy in the treatment of liver failure.
journal_name
Chin Med J (Engl)journal_title
Chinese medical journalauthors
Hu A,Cai J,Zheng Q,He X,Pan Y,Li Lkeywords:
subject
Has Abstractpub_date
2003-12-01 00:00:00pages
1893-7issue
12eissn
0366-6999issn
2542-5641journal_volume
116pub_type
杂志文章abstract:BACKGROUND:Congenital heart disease (CHD) is a common heart condition which does considerable harm to the health of children and adolescents. CHD epidemiological characteristics of Tibetan children whose ages ranged from 4 to 18 years were investigated in Qinghai Province. METHODS:A total of 32 578 Tibetan children, l...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2008-12-20 00:00:00
abstract:OBJECTIVE:Little information is available to guide treatment strategies regarding patients with unexpected positive cultures (UPC), including Propionibacterium acnes (PA), without overt signs of infection in revision shoulder arthroplasty (RSA). The purpose of our study was to analyze the prevalence, clinical meaning, ...
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:: ...
journal_title:Chinese medical journal
pub_type: 社论
doi:10.4103/0366-6999.247217
更新日期:2018-12-20 00:00:00
abstract:OBJECTIVE:To observe the characteristics of coronary microvascular lesions (CML) in the autopsied elderly cases with hypertensive left ventricular hypertrophy (LVH) and the difference of CML among the groups of essential hypertension (EHT), coronary heart disease (CHD) and diabetes (NIDDM) also with LVH. METHODS:A ret...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2002-05-01 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:To explore the response of nasal mucosa epithelial cells to hypoxia in terms of formation of nasal polyps (NP). METHODS:Epithelial cells of NP and inferior turbinate (IT) were cultured serum-free under normal oxygen and hypoxic circumstances with stimulation of IL-1 beta and TNF alpha. The vascular endotheli...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2003-02-01 00:00:00
abstract:OBJECTIVE:To evaluate the use of oxygen in neonates in the past, present and future. DATA SOURCES:The data are mainly from Pubmed with relevant published articles from the 1940s to the present with some information gathered from web searches. STUDY SELECTION:Studies evaluating the use of oxygen in premature and term ...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:
更新日期:2010-10-01 00:00:00
abstract:BACKGROUND:Dendritic cells (DCs) are the most important professional antigen presenting cells that play a key role in initiating adaptive immune responses. The depletion and dysfunction of DCs contribute to the development of immunodeficiency or immunoparalysis in some lung diseases. In the present study, we investigat...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2012-07-01 00:00:00
abstract:Objective:Endothelial cells (ECs) are important metabolic and endocrinal organs which play a significant role in regulating vascular function. Vascular ECs, located between the blood and vascular tissues, can not only complete the metabolism of blood and interstitial fluid but also synthesize and secrete a variety of b...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:10.4103/0366-6999.241805
更新日期:2018-10-05 00:00:00
abstract:OBJECTIVES:To study the interrelation between nitric oxide (NO) and endothelin-1 (ET1) in experimental acute hypoxic rats, and to evaluate the mechanism of acute hypoxic pulmonary hypertension affected by NO and ET1 and its intervention. METHODS:Nicotinamide adenine dinucleotide phosphate (NADPH) diaphorase histochemi...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1999-04-01 00:00:00
abstract:OBJECTIVE:To induce islet grafting tolerance by intravenous injection of anti-CD4, anti-CD8 immunotoxins and donor soluble antigen. METHODS:Fourteen days or 7 days prior to transplantation, the immunotoxin of anti-CD4, anti-CD8 200 micrograms respectively, and donor soluble antigen 500 micrograms were intravenously in...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1999-12-01 00:00:00
abstract:BACKGROUND:Although some studies have reported that aquaporin-4 (AQP4) plays a role in the post-ischemic edema formation and diffusion-weighted imaging (DWI), little is known about the AQP4 expression in stage of the reperfusion following acute cerebral ischemia, as well as the correlation between histopathology and DW...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2011-10-01 00:00:00
abstract:OBJECTIVE:To analyze the effect and mechanism of hyperbaric oxygen (HBO) treatment for severe brain injury (SBI). METHODS:Fifty-five patients were divided into a treatment group of 35 patients and a control group of 20 patients. We observed the alterations of clinical, brain electric earth map (BEAM), endothelin (ET) ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2001-04-01 00:00:00
abstract:BACKGROUND:Robotic assisted minimally invasive cardiac sugery is a new technique that uses small port sites and peripheral vessel cannulation for cardiopulmonary bypass (CPB) has been used. The right internal jugular vein (IJV) is commonly used for intraoperative venous access to the central circulation and identified ...
journal_title:Chinese medical journal
pub_type: 临床试验,杂志文章
doi:
更新日期:2013-07-01 00:00:00
abstract:BACKGROUND:Excessive expression of thymic stromal lymphopoietin (TSLP) has been demonstrated in asthmatic airway epithelia and in nasal epithelia from animal models of allergic rhinitis (AR), but the evidence of expression of TSLP in nasal epithelial cells (NECs) of patients with AR is lacking. We aimed to investigate ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2009-10-05 00:00:00
abstract:BACKGROUND:Orthotopic liver transplantation (OLT) has become the therapeutic option of choice for end-stage liver disease. The aim of this study was to investigate the changes of splenic morphology, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), apparent diffusion coefficient (ADC) values and explore their...
journal_title:Chinese medical journal
pub_type: 杂志文章,随机对照试验
doi:
更新日期:2014-01-01 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:Ulcerative colitis (UC) is associated with differential expression of genes involved in inflammation and tissue remodeling. MicroRNA (miRNA) plays an important role in the pathogenesis of UC by regulating the gene expression at the post-transcriptional level and control crucial physiological processes. This ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2013-01-01 00:00:00
abstract:OBJECTIVE:To understand whether very low density lipoprotein (VLDL) and oxidatively modified very low density lipoprotein (OX-VLDL) can stimulate vascular smooth muscle cells (SMCs) to express high level of monocyte chemotactic protein (MCP-1) mRNA. METHODS:LDL and VLDL were isolated from normal blood donors by densit...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1996-03-01 00:00:00
abstract:OBJECTIVE:To determine mutations of two common potassium channel subunit genes KCNQ1, KCNH2 causing long QT syndrome (LQTS) in the Chinese. METHODS:Thirty-one Chinese LQTS pedigrees were characterized for mutations in the two LQTS genes, KCNQ1 and KCNH2, by sequencing. RESULTS:Two novel KCNQ1 mutations, S277L in the ...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2003-09-01 00:00:00
abstract::It is difficult to make a precise diagnosis of intestinal tuberculosis and to differentiate it from Crohn's disease. For evaluating Polymerase Chain Reaction (PCR) assay in these two aspects, 36 specimens of intestinal tuberculosis from surgical resections and endoscopic biopsies and 26 Crohn's disease samples were su...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1995-03-01 00:00:00
abstract:OBJECTIVE:To evaluate the feasibility, safety and diagnostic accuracy of pharmacologic stress of (99m)Technetium-MIBI single-photon emission computed tomography (SPECT) with intravenous adenosine triphosphate (ATP) in patients with suspected coronary artery disease. METHODS:The study group included 263 patients who we...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2002-11-01 00:00:00
abstract::An epidemic of parenterally transmitted non-A, non-B hepatitis (PT-NANBH) occurred in plasmapheresis donors in Guan County, Hebei Province, China, in 1985. PT-NANBH was diagnosed by epidemiological studies and serological exclusion of HAV, HBV, CMV and EBV infections. Recently, 163 sera samples of 108 patients with PT...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:1991-06-01 00:00:00
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2006-11-05 00:00:00
abstract:OBJECTIVE:To investigate the complications of laparoscopic cholecystectomy in China. METHODS:All Chinese articles about laparoscopic cholecystectomy published between April 1994 and November 1995 were identified through CMCC (Chinese Medical Computerized Contents). From more than 600 titles, 105 articles were screened...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:
更新日期:1997-09-01 00:00:00
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journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2013-07-01 00:00:00
abstract:BACKGROUND:Successful antiretroviral therapy (ART) has been demonstrated to be effective in reducing the infectivity of human immunodeficiency virus (HIV). We conducted a study to predict the potential effect of ART on the spread of HIV in Chaoyang District, Beijing, China, using the Asian Epidemic Model (AEM). METHOD...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:10.4103/0366-6999.196571
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVE:This article aims to present a brief profile of the advances in prevention and treatment of myocardial injury in cancer therapy based on relevant literature or reports. DATA SOURCES:The data cited in this review were obtained from articles indexed in PubMed and China National Knowledge Internet (CNKI) up to ...
journal_title:Chinese medical journal
pub_type: 杂志文章,评审
doi:10.1097/CM9.0000000000000498
更新日期:2019-11-20 00:00:00
abstract:BACKGROUND:Now lung volume reduction surgery (LVRS) has become one of the most effective methods for the management of some cases of severe chronic obstructive pulmonary disease (COPD). We evaluated the mid-term effects of LVRS on pulmonary function in patients with severe COPD. METHODS:Ten male patients with severe C...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2007-04-20 00:00:00
abstract:OBJECTIVE:To investigate the effects of propofol, midazolam and thiopental sodium on outcomes and amino acid accumulation in focal cerebral ischemia-reperfusion in rats. METHODS:Male Sprague Dawley (SD) rats were scheduled to undergo 3-hour middle cerebral artery occlusion by intraluminal suture and 24-hour reperfusio...
journal_title:Chinese medical journal
pub_type: 杂志文章
doi:
更新日期:2003-02-01 00:00:00