Abstract:
:Cell density has profound impacts on the cell culture practices of human pluripotent stem cells. The regulation of cell growth, cell death, pluripotency and differentiation converge at high density, but it is largely unknown how different regulatory mechanisms act at this stage. We use a chemically defined medium to systemically examine cellular activities and the impact of medium components in high-density culture. We show that medium acidosis is the main factor that alters cell cycle, gene expression and cellular metabolism at high cell density. The low medium pH leads to inhibition of glucose consumption, cell cycle arrest, and subsequent cell death. At high cell density, the suppression of medium acidosis with sodium bicarbonate (NaHCO3) significantly increases culture capacity for stem cell survival, derivation, maintenance and differentiation. Our study provides a simple and effective tool to improve stem cell maintenance and applications.
journal_name
Int J Biol Scijournal_title
International journal of biological sciencesauthors
Liu W,Ren Z,Lu K,Song C,Cheung ECW,Zhou Z,Chen Gdoi
10.7150/ijbs.24681subject
Has Abstractpub_date
2018-04-05 00:00:00pages
485-496issue
5issn
1449-2288pii
ijbsv14p0485journal_volume
14pub_type
杂志文章abstract::Odor-detection in the malaria mosquito Anopheles gambiae involves large families of diverse proteins, including multiple odorant binding proteins (AgOBPs) and olfactory receptors (AgORs). The receptors AgOR1 and AgOR2, as well as the binding protein AgOBP1, have been implicated in the recognition of human host odors. ...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.6.614
更新日期:2010-10-08 00:00:00
abstract::Epithelial-to-mesenchymal transition (EMT) is a key process in EGFR-TKI resistance but the detailed mechanism is largely unknown. We aim to evaluate the role of interleukin-6 (IL-6) and insulin-like growth factor-1 receptor (IGR-1R) in EMT in non-small cell lung cancer (NSCLC). We used IL-6 to induce EMT in EGFR-TKI s...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.31999
更新日期:2019-07-20 00:00:00
abstract::The objective of this work was to evaluate the bioavailability of heme iron added to biscuit filling. It comprised two stages: first, the development of the heme iron enriched biscuit filling; second, the evaluation of the bioavailability of the mineral in fattening piglets. Two groups were selected randomly and fed: ...
journal_title:International journal of biological sciences
pub_type: 杂志文章,随机对照试验
doi:10.7150/ijbs.4.58
更新日期:2008-02-18 00:00:00
abstract::Emerging evidence has indicated that abnormal microRNAs (miRNAs) participated in carcinogenesis and tumor progression in hepatocellular carcinoma (HCC). Better understanding the association between miRNAs and HCC may contribute to discover novel therapeutic approaches for diagnosis and treatments. In the current study...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.33658
更新日期:2019-06-02 00:00:00
abstract::Pathogens have developed strategies to modify Dendritic Cells (DCs) phenotypes and impair their functions in order to create a safer environment for their survival. DCs responses to helminths and their derivatives vary among different studies. Here we show that excretory/secretory products of the cestode Taenia crassi...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.7.1391
更新日期:2011-01-01 00:00:00
abstract::RNA interference has been described as a powerful genetic tool for gene functional analysis and a promising approach for pest management. However, RNAi efficiency varies significantly among insect species due to distinct RNAi machineries. Lepidopteran insects include a large number of pests as well as model insects, s...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.10235
更新日期:2015-01-05 00:00:00
abstract::Chronic back pain is a global health problem affecting millions of people worldwide and carries significant economic and social morbidities. Intervertebral disc damage and degeneration is a major cause of back pain, characterised by histological and biochemical changes that have been well documented in animal models. ...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.5.388
更新日期:2009-06-03 00:00:00
abstract::This study aims to investigate the effect and mechanism of type 2 voltage-gated chloride channel (ClC-2) on myelin development of newborn rats' cerebral white matter with gestational diabetes mellitus (GDM). In this study, GDM model was induced in late pregnant rat model. The alteration of ClC-2 expression in various ...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.17716
更新日期:2017-01-15 00:00:00
abstract::Osteosarcoma (OS) is considered the most common type of primary malignant bone tumor, which has an urgent need for more effective treatment. Recently, chitinase 3 like 1 (Chi3L1) expression has been found in a variety of cancer cells. However it is not known whether Chi3L1 regulates the STAT3 pathway in OS cells. Here...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.37781
更新日期:2020-01-01 00:00:00
abstract::Retrospective and prospective studies show that lean mass or strength is positively associated with metabolic health. Mice deficient in myostatin, a growth factor that negatively regulates skeletal muscle mass, have increased muscle and body weights and are resistant to diet-induced obesity. Their leanness is often at...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.13525
更新日期:2016-04-01 00:00:00
abstract::Interleukin-8 (IL-8) is a common inflammatory factor, which involves in various non-specific pathological processes of inflammation. It has been found that increased endothelial permeability accompanied with high expression of IL-8 at site of injured endothelium and atherosclerotic plaque at early stages, suggesting t...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.6996
更新日期:2013-09-23 00:00:00
abstract::Cardiac and skeletal muscle tissue engineering provides a smart approach to overcome problems associated with organ transplantation and cardiac tissue and also lays a platform for superior alternative approaches in muscle regeneration. The aim of the study was to demonstrate cryogel scaffold potential in the field of ...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.6.371
更新日期:2010-07-03 00:00:00
abstract:PURPOSE:To test the hypothesis that cardiac morphologic differences between Ames dwarf and wild-type littermates might correlate with the increased longevity observed in the Ames dwarf mice. METHODS:Hearts removed from young adult (5-7 mo) and old (24-28 mo) Ames dwarf and wild-type littermates underwent histological ...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.6.475
更新日期:2010-09-01 00:00:00
abstract::The gene encoding PDX1 (pancreatic duodenum homeobox 1), the main transcription factor regulating the glucose-dependent transactivation of the insulin promoter in pancreatic beta-cells, clusters with two closely related homeobox genes (Gsh1 and Cdx2/3), all of them belonging to the ParaHox gene family. The ParaHox gen...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.4.48
更新日期:2008-02-06 00:00:00
abstract:BACKGROUND:The unfolded protein response, autophagy and endoplasmic reticulum (ER) stress-induced apoptosis regulate tumor cell fate and have become novel signaling targets for the development of cancer therapeutic drugs. Curcumin has been used to treat several different cancers, including ovarian cancer, in clinical t...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.5711
更新日期:2013-08-14 00:00:00
abstract::Pacemaker activity of the sinoatrial node has been studied extensively in various animal species, but is virtually unexplored in man. As such, it is unknown whether the fast sodium current (I(Na)) plays a role in the pacemaker activity of the human sinoatrial node. Recently, we had the unique opportunity to perform pa...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.5.201
更新日期:2009-01-01 00:00:00
abstract::Transforming growth factor β (TGF-β) signaling pathway plays important roles in many biological processes, including cell growth, differentiation, apoptosis, migration, as well as cancer initiation and progression. SMAD4, which serves as the central mediator of TGF-β signaling, is specifically inactivated in over half...
journal_title:International journal of biological sciences
pub_type: 杂志文章,评审
doi:10.7150/ijbs.23230
更新日期:2018-01-12 00:00:00
abstract::Background & aims: VEGFR-3 has been shown of great significance in lymph node metastasis and some malignancies, however, its expression in tumors and impact on outcome of intrahepatic cholangiocarcinoma (iCCA) remains unknown. The aim of this study was to assess the role of VEGFR-3 positive tumors for prognosis of iCC...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.26045
更新日期:2018-07-27 00:00:00
abstract::CKLF-like MARVEL transmembrane domain-containing member (CMTM) is a new gene family first cloned and reported in 2001. The CMTM family consists of nine members including CKLF and CMTM1-CMTM8, which are located on different chromosomes. Besides exhibiting extensive chemotactic activity, the CMTM family plays an importa...
journal_title:International journal of biological sciences
pub_type: 杂志文章,评审
doi:10.7150/ijbs.33733
更新日期:2019-09-07 00:00:00
abstract::Autism is a neurodevelopmental disorder with unknown etiology. In some cases, typically developing children regress into clinical symptoms of autism, a condition known as regressive autism. Protein kinases are essential for G-protein-coupled receptor-mediated signal transduction, and are involved in neuronal functions...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.4742
更新日期:2012-01-01 00:00:00
abstract::When pathogenic stresses are recognized by innate immune cells, inflammasomes are assembled and caspase-1 is activated, resulting in the conversion of pro-IL-18 into mature IL-18. Because natural killer (NK) cells express IL-18 receptors, IL-18 may play roles in immune functions of NK cells. In the present study, we e...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.22809
更新日期:2018-03-09 00:00:00
abstract::Dengue virus (DENV) causes the most prevalent arthropod-borne viral disease of humans worldwide. Glycosphingolipids (GSLs) are involved in virus infection by regulating various steps of viral-host interaction. However, the distinct role of GSLs during DENV infection remains unclear. In this study, we used mouse melano...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.15641
更新日期:2016-05-25 00:00:00
abstract::Angiogenesis plays an important role in myocardial repair after myocardial infarction (MI). Cardiac micro-vascular endothelial cells (CMECs) are important participants in myocardial angiogenesis processes. Recent studies have revealed that Nuclear factor-erythroid 2-related factor 2 (Nrf2), a master transcription fact...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.5887
更新日期:2013-07-07 00:00:00
abstract::Rheumatoid arthritis (RA) is characterized by synovial lining hyperplasia, which involves abnormal growth of fibroblast-like synoviocytes (FLSs). This study aimed to investigate the function and molecular mechanism of peptidylarginine deiminase type 4 (PADI4) in FLSs isolated from RA patients (RA-FLSs). FLSs were isol...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.16879
更新日期:2017-02-25 00:00:00
abstract::Objective: Recent studies demonstrate circulating serum spexin levels are reduced in obesity or type 2 diabetes mellitus (T2DM) patients and may play a role in glucose metabolism. The mechanism underlying is not known. In this study, we explore whether spexin has a role in insulin resistance and hepatic glucose metabo...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.31781
更新日期:2019-11-01 00:00:00
abstract::Germ cells produce sperm and eggs for reproduction and fertility. The Asian seabass (Lates calcarifer), a protandrous marine fish, undergoes male-female sex reversal and thus offers an excellent model to study the role of germ cells in sex differentiation and sex reversal. Here we report the cloning and expression of ...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.6797
更新日期:2014-02-06 00:00:00
abstract:BACKGROUND:Increasing evidences suggest that innate immunity is involved in cerebral ischemia-reperfusion (I/R) injury, but the liable innate immune receptors have not been completely elucidated. Here, we explored the role of the nucleotide-binding oligomerization domain (NOD)2, a member of the cytosolic NOD-like recep...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.10927
更新日期:2015-03-25 00:00:00
abstract::Foxp3⁺ regulatory T lymphocytes (Tregs) usually act as an immune suppressor and correlate with poorer survival in malignancies. This study aims to investigate the distribution and characterization of Foxp3(+) subset in peripheral blood mononuclear cells (PBMCs) and tumor tissues from extranodal NK/T cell lymphoma (ENK...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.7.1027
更新日期:2011-01-01 00:00:00
abstract::Melatonin is present in mammalian follicular fluid and plays an important role in regulating steroidogenesis in follicular cells. In this study, we report the effect of melatonin on steroidogenesis in the theca interna (TI) in small bovine follicles and theca cells (TCs) cultured in vitro. Treatment with melatonin sig...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.27912
更新日期:2019-01-01 00:00:00
abstract::In order to find a blood host and to select appropriate oviposition sites female Anopheles gambiae mosquitoes rely on olfactory cues which are sensed by olfactory sensory neurons (OSNs) located within morphologically different sensilla hairs. While the sharp type trichoid sensilla are most abundant and intensely studi...
journal_title:International journal of biological sciences
pub_type: 杂志文章
doi:10.7150/ijbs.8754
更新日期:2014-03-22 00:00:00