3,134 publications from this institution
Dried leaves of Marchantia convoluta are largely used to protect livers,and to treat tumefaction of skins in China. Flavonoids from Marchantia Convoluta (MCF) was one of the mostpotentially effective anti-inflammatory. MCF was studied here for its ability to inhibit the proliferation of 2,2,15 cells(clone cells derived from HepG2 cells that were transected with a plasmid containing HBV, DNA). All concentrations(5,10,20 and 40 :g/ml) of MCF inhibit hepatitis B surface antigen (HbsAg) and hepatitis B E antigen (HbeAg) in thecultured medium released from 2.2.15 cells. Analysis of morphological changes of MCF-treated phase- contrastmicroscope revealed a possible model of action for MCF to inhibit Proliferation of 2.2.15 cells by inducing apoptosis.
The value of a parameter such as heritability (h 2 ) or intra-dass correlation in best linear unbiased prediction (BLUP) with the animal model or a family selection index affects both the rate of response achieved and the rate of inbreeding. If in BLUP an estimate of h 2 is used which is biased upwards above its actual value, the rate of inbreeding can be substantially reduced with little reduction in the rate of response. Further, by mating individuals from families in which many are selected to others from families with few selected (compensatory mating), rates of inbreeding can be further reduced without substantial effect on response.
Gastric cancer remains one of the most lethal and prevalent malignancies, yet the cellular composition and developmental trajectory of its tumor populations are not fully understood. In this study, we performed single-cell multiome sequencing on paired tumor and adjacent tissue samples from gastric cancer patients. By integrating single-cell RNA sequencing (scRNA-seq) and single-cell Assay for Transposase-Accessible Chromatin using sequencing (scATAC-seq) data, we identified three primary epithelial components in gastric cancer: normal cells, metaplastic cells and cancer cells. Our analysis revealed that gastric isthmus stem cells exist in three distinct states in the context of gastric cancer: normal isthmus stem cells, SI + metaplastic isthmus stem cells (SI: Sucrase-Isomaltase, NCBI gene ID: 6476, Ensembl ID: ENSG00000090402), and cancer isthmus stem cells. SI + metaplastic isthmus stem cells serve as the cellular origin of gastric intestinal metaplasia, while cancer isthmus stem cells give rise to heterogeneous subpopulations of cancer cells. Furthermore, somatic mutation analysis demonstrated that cancer cells are derived from metaplastic cells. Collectively, our findings reveal the important role of isthmus stem cells in gastric carcinogenesis, reconstruct the lineage trajectory and establish a refined classification system for gastric cancer cells.
Abstract: The maintenance of diversity is, from a genetic perspective, one of the key aims in a conservation program. Because the most widely used measure of genetic diversity is the expected heterozygosity of the population, or gene diversity (GD), most research has been devoted to finding optimal strategies for maximizing this parameter. Little attention has been paid, however, to the development of strategies to manage allelic diversity (AD), the number of alleles maintained in the population. Using computer simulations, we show that the strategies that maximize GD, by managing contributions from parents, keep levels of AD as high as strategies maximizing AD itself, for a wide range of situations including different numbers of molecular markers used and the possibility of evaluating a number of offspring per parent to make decisions. Because maximization of GD also minimizes levels of inbreeding, this should be the strategy of choice in any conservationprogram.
PartitionTest test suite
Alzheimer’s disease (AD) is a progressive neurodegenerative disorder associated with memory impairment and cognitive deficit, which is characterized with low levels of the neurotransmitter acetylcholine in the brain of the patients. Histopathological hallmarks of AD include deposition of β-amyloid (Aβ) plaques and formation of neurofibrillary tangles. It is generally accepted that AChE inhibitors (AChEi) can alleviate the symptoms of AD. Currently, most of the drugs available for the treatment of AD are AChEi: tacrine, donepezil, rivastigmine and galantamine. The research of novel drug candidates has shown that natural products such as plant extracts and plant-originated compounds have enormous potential to become drug leads with neuroprotective activity. For example, galantamine is a natural alkaloid first obtained from Galanthus spp. (USFDA approval in 2001). Huperzine A, an alkaloid found in Huperzia spp., is an AChE inhibitor commercialized as a dietary supplement for memory support, used to treat AD symptoms in China. Nevertheless, the search of natural products for treatment of from plants still draws considerably attention, and the number of papers published every year in this field is far from decline. This issue, which includes both original research and review papers, focus on the basic and application of natural products for managing AD. Andrade et al. [1]
Outside front cover image: Plasmonic effects in nanomaterials, metal nanoparticles in particular, have been applied in a variety of fields, such as plasmon-enhanced spectroscopies (e.g. surface-enhanced Raman scattering, surface-enhanced fluorescence, plasmon-enhanced optical activity…), photocatalysis, cancer therapy, etc. The performance of plasmonic nanometals can be further enhanced by combining them with metal-organic frameworks (MOFs), which feature well-defined pore size, large surface-area, diverse chemical/physical information, and efficient capture of specific molecules. The resulting hybrid nanomaterials, known as plasmonic MOFs, offer improved and further extended applications through a synergistic activity. Application-oriented topologies and compositions of plasmonic MOFs can be precisely controlled by means of thermodynamic and kinetic parameters during the synthetic process. (DOI: https://doi.org/10.1002/smm2.1047)