Dual light source compensation method for improving the quality of LC-SLM holographic displays.

The inherent "grid" effect of LC-SLM in holographic displays can lead to issues such as the presence of zero-order spots and multi-level diffraction images, resulting in a decrease in the quality of reconstructed images. In this Letter, a dual light source compensation method is proposed to address this problem. By analyzing the influence of the LC-SLM "grid" effect on the diffraction field and the rule of change of light intensity distribution and position of the reconstructed image, the dual light source is introduced on the basis of the rule of change of energy distribution at the symmetric position of the reconstructed image so as to compensate for the quality of the display results. The results show that the method not only avoids the influence of zero-order spot and multi-level diffraction image on the holographic display results but also especially highlights that the uniformity of light energy distribution of the reconstructed image is greatly improved, which provides a reference for LC-SLM to perform a higher-quality holographic display.

Modeling drug-induced liver injury and screening for anti-hepatofibrotic compounds using human PSC-derived organoids.

Preclinical models that can accurately predict the toxicity and efficacy of candidate drugs to human liver tissue are in urgent need. Human liver organoid (HLO) derived from human pluripotent stem cells offers a possible solution. Herein, we generated HLOs, and demonstrated the utility of these HLOs in modeling a diversity of phenotypes associated with drug-induced liver injury (DILI), including steatosis, fibrosis, and immune responses. Phenotypic changes in HLOs after treatment with tool compounds such as acetaminophen, fialuridine, methotrexate, or TAK-875 showed high concordance with human clinical data in drug safety testings. Moreover, HLOs were able to model liver fibrogenesis induced by TGFß or LPS treatment. We further devised a high-content analysis system, and established a high-throughput anti-fibrosis drug screening system using HLOs. SD208 and Imatinib were identified that can significantly suppress fibrogenesis induced by TGFß, LPS, or methotrexate. Taken together, our studies demonstrated the potential applications of HLOs in drug safety testing and anti-fibrotic drug screening.

Acute liver steatosis translationally controls the epigenetic regulator MIER1 to promote liver regeneration in a study with male mice.

The early phase lipid accumulation is essential for liver regeneration. However, whether this acute lipid accumulation can serve as signals to direct liver regeneration rather than simply providing building blocks for cell proliferation remains unclear. Through in vivo CRISPR screening, we identify MIER1 (mesoderm induction early response 1) as a key epigenetic regulator that bridges the acute lipid accumulation and cell cycle gene expression during liver regeneration in male animals. Physiologically, liver acute lipid accumulation induces the phosphorylation of EIF2S1(eukaryotic translation initiation factor 2), which consequently attenuated Mier1 translation. MIER1 downregulation in turn promotes cell cycle gene expression and regeneration through chromatin remodeling. Importantly, the lipids-EIF2S1-MIER1 pathway is impaired in animals with chronic liver steatosis; whereas MIER1 depletion significantly improves regeneration in these animals. Taken together, our studies identify an epigenetic mechanism by which the early phase lipid redistribution from adipose tissue to liver during regeneration impacts hepatocyte proliferation, and suggest a potential strategy to boost liver regeneration.

Comparative analysis of codon usage patterns in chloroplast genomes of ten Epimedium species.

BACKGROUND: The Phenomenon of codon usage bias exists in the genomes of prokaryotes and eukaryotes. The codon usage pattern is affected by environmental factors, base mutation, gene flow and gene expression level, among which natural selection and mutation pressure are the main factors. The study of codon preference is an effective method to analyze the source of evolutionary driving forces in organisms. Epimedium species are perennial herbs with ornamental and medicinal value distributed worldwide. The chloroplast genome is self-replicating and maternally inherited which is usually used to study species evolution, gene expression and genetic transformation. RESULTS: The results suggested that chloroplast genomes of Epimedium species preferred to use codons ending with A/U. 17 common high-frequency codons and 2-6 optimal codons were found in the chloroplast genomes of Epimedium species, respectively. According to the ENc-plot, PR2-plot and neutrality-plot, the formation of codon preference in Epimedium was affected by multiple factors, and natural selection was the dominant factor. By comparing the codon usage frequency with 4 common model organisms, it was found that Arabidopsis thaliana, Populus trichocarpa, and Saccharomyces cerevisiae were suitable exogenous expression receptors. CONCLUSION: The evolutionary driving force in the chloroplast genomes of 10 Epimedium species probably comes from mutation pressure. Our results provide an important theoretical basis for evolutionary analysis and transgenic research of chloroplast genes.

Baohuoside I Inhibits the Proliferation of Hepatocellular Carcinoma Cells via Apoptosis Signaling and NF-kB Pathway.

Baohuoside I is a flavonoid isolated from Epimedium koreanum Nakai and has many pharmacological activities. However, its role in liver cancer remains unclear. This study aimed to investigate the inhibitory effect of Baohuoside I on the Human Hepatocellular Carcinoma (HCC) cell lines QGY7703, and underlying mechanisms. QGY7703 cells were used as the model to assess the function of Baohuoside I in vitro. The effects of Baohuoside I on QGY7703 cells' growth, proliferation, and invasiveness were confirmed by CCK-8, lactate dehydrogenase release, and invasion assays. Cell apoptosis was analyzed by flow cytometry, and the levels of cleaved Caspase-3, Bax, and Bcl-2 were quantified by western blot. Western blot analysis, nuclear translocation of NF-κB, and Q-PCR were used to measure the expression of affected molecules. In QGY7703 cells, Baohuoside I induced the expression of molecules related to NF-κB pathway. The toxicity of Baohuoside I on QGY7703 cells was also confirmed in vivo, in a tumor model. Baohuoside I had a significant toxic effect on QGY7703 cells from a concentration of 10 µM. This compound significantly inhibited the proliferation of QGY7703 cells by inducing apoptosis and downregulating NF-κB signaling pathway. Thus, Baohuoside I is a novel candidate drug and opens new possibilities of clinical strategies for HCC treatment.

[Study on GLI values of Polygonatum odoratum base on multi-temporal of unmanned aerial vehicle remote sensing].

Unmanned aerial vehicle(UAV) remote sensing and vegetation index have great potential in the field of Chinese herbal medicine planting. In this study, the visible light image of Polygonatum odoratum planting area in Changyi district of Jilin province were acquired by UAV, and the real-time monitoring of P. odoratum planting area was realized. The green leaf index(GLI) was established, and GLI values of P. odoratum were collected used the spatial sampling points. To compare the GLI values in different periods, it was found that the GLI values of P. odoratum have three stages changing rule of rising-gentle-falling related to the germination, vigorous growth and withered of P. odoratum growth. Meanwhile, the GLI values were compared with four biomass data of P. odoratum, including plant height, leaf area, chlorophyll a and chlorophyll b content in leaves, and it was found that the GLI value was related to the growth potential of P. odoratum. The GLI value with a rapid increase in rising stage or at a high level in the gentle stage means the P. odoratum was in a better growth potential. GLI value has a same change trend with plant height, and has certain correlation with plant height and leaf area. However, there is no obvious relationship between chlorophyll a and chlorophyll b contents in leaves and GLI value. The study clarified the change rule of GLI value of P. odoratum, explained the reason for the change of GLI value, and expanded the application range of GLI. The research shows that UAV and vegetation index can be applied to monitoring the Chinese herbal medicines planting, and provides a new idea for exploring more effective information extraction methods of Chinese herbal medicines.

[Investigation and analysis of influence of geographical environment factors on spatial distribution of flavonoid of Epimedium koreanum].

The study is aimed to clarify the spatial distribution of Epimedium koreanum( Ek) high-quality production areas. Through visiting and field investigation,collecting the distribution information of Ek samples,and based on the four kinds of flavonoids in Ek,the high-quality production areas and distribution of Ek distribution of the main environmental factors were drawn using GIS technology,the maximum entropy model( MaxEnt),geographical detector statistical analysis method,and the statistical significance of regression equation were obtained. Considering the content of 4 main flavonoids in Ek,the results of this study showed that the main environmental factors,such as precipitation,annual precipitation variation coefficient,annual average temperature and clay content exhibited the greatest influence on the growth suitability of Ek. Ek materials quality concentrated distribution in southeastern Jilin province Changbai mountain hinterland and northeastern Liaoning province. Ek with high content of epimedine A and epimedine C are mainly distributed in the southeastern Jilin province and northeastern Liaoning province,Ek with high epimedine B is distributed in eastern Liaoning province; high icariin Ek was found in most area of northeastern Liaoning province,a small amount distributed in the southeast of Jilin province. This study predicted the climate suitability distribution of Ek,and provided reference for the rational planning and establishment of the standardized cultivation base of Ek.

Toxic effects and mechanism of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) on Lemna minor.

To investigate the toxic effect and mechanism of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) in aquatic plants, in vivo and in vitro exposure to BDE-47 were conducted. After 14-d exposure to 5-20 µg/L BDE-47, the growth of Lemna minor plants was significantly suppressed, and the chlorophyll and soluble protein contents in fronds markedly decreased. Accordingly, the photosynthetic efficiency (Fv/Fm, PI) decreased. When the thylakoid membranes isolated from healthy fronds was exposed to 5-20 mg/L BDE-47 directly in vitro for 1 h, the photosynthetic efficiency also decreased significantly. In both the in vitro (5-20 µg/L) and in vivo (5-20 mg/L) experiments, BDE-47 led to an increased plasma membrane permeability. Hence, we concluded that BDE-47 had a direct toxicity to photosynthetic membranes and plasma membranes. However, direct effects on the activities of peroxidase (POD), malate dehydrogenase (MDH) and nitroreductase (NR) were not observed by adding 5-20 mg/L BDE-47 into crude enzyme extracts. The malondialdehyde (MDA) and superoxide anion radical (O2-) contents in the BDE-47 treated fronds were higher than those in the control fronds, suggesting that L. minor can not effectively relieve reactive oxygen species (ROS). The data above indicates that BDE-47 is toxic to L. minor through acting directly on biomembranes, which induces the production of ROS and thus causes remarkable oxidative damage to cells.

[Regionalization study of Dioscorea nipponica in Jilin province based on MaxEnt and ArcGIS].

At the urgent practical issue of resource protection and artificial cultivation area selection of Dioscorea nipponica, the dominant environmental factors affecting the distribution of D. nipponicain Jilin province were selected by field investigation and using the maximum information entropy model and geographic information technology. MaxEnt model study found that the standard deviation of seasonal variation of temperature, precipitation in October and other six environmental factors on the growth of D. nipponica are the greatest impacting factors. The range of suitability for the growth of D. nipponica was 4.612 08×10-6-0.544 31, and the regionalization study was divided into four parts: high fitness area, middle fitness area, low fitness area and unfavorable area. The high fitness area is concentrated in the central and southern areas of Jilin Province, using ArcGIS statistical environment factors in the appropriate area of the numerical situation. The results showed that the regionalization study of D. nipponica was basically the same as the actual situation. It is clear that the natural environment suitable for the growth of D. nipponica is also the basis for the protection of the resources and the selection of cultivated area.

[On origin of Oviductus Ranae in Chinese Pharmacopoeia].

OBJECTIVE: To discuss the problem about the origin of Oviduetus Ranae in the Chinese Pharmacopoeia according to historical documents, the researches reported recently and the author research. METHOD: Through comprehensive analysis of the documents and materials reported, the original animal sources of Oviduetus Ranae was discussed in terms of historical records, morphology, karyotype, Ag-Belt and isoenzyme electrophoresis, gene levels and so on. RESULT AND CONCLUSION: The original animal sources of Oviduetus Ranae is Rana dybowskii,its order element is an effective species in China. In order to avoid the problem of species confusion about the origin of Oviduetus Ranae, author suggests that R. dybowskii should be the original animal of Oviduetus Ranae.

[Quality evaluation on eighteen samples of forest frog's oviduct from different habitat of northeast China].

OBJECTIVE: To compare eighteen samples of Forest frog's oviduct from different regions of northeast China, in order to fomulate the quality evaluation standard. METHODS: According to the documents, comparing the target constituent of Forest frog's oviduct, including the mositure, ash, protein, lipid and expansibility were analysed. RESULTS: It was similar to the chemical constituent in Forest frog's oviduct from different habitiat of northeast China. CONCLUSION: The germplasm of this species is stable.

[Determination of cholesteryl palmitate in Oviductus Ranae by HPLC].

OBJECTIVE: To develop a new method for the determination of cholesteryl palmitate in Oviductus Ranae. METHOD: A HPLC method was set up, using Zorbax Silica column and cyclohexane-diethyl ether (40:1) as mobile phase with a flow rate of 1.0 mL x min(-1), and the UV detection wavelength was 203 nm. RESULT: The calibration curve was linear over the range of 0.60-8.92 microg (r = 0.9997), the average recovery of the method was 98.4%. RSD 1.8% (n = 6). CONCLUSION: The results showed that method was reliable and accurate.

[Study on the origin of Rana temporaria for quality Oviduetus Ranae].

OBJECTIVE: To determine the origin of Rana temporaria for quality Oviduetus Ranae in the light of historical documents and modern researches on the classification of Rana temporaria chensinensis. METHOD: Works of Chinese meteria medica of all ages, related historical documents and reports from home and abroad on researches of R. temporaria chensinensis were consulted, sorted out, analyzed and summarized. RESULT: The original Shange recorded in the works of Chinese meteria medica is R. temporaria chensinensis, which is the independent species, not one of species of European forest frogs. R. temporaria chensinensis is divided into 4 subspecies: R. temporaria chensinensis, Lanzhou, Kangding, and Changbaishan. The origin of R. temporaria is Changbaishan subspecies of R. temporaria chensinensis. CONCLUSION: Changbaishan subspecies of R. temporaria chensinensis is determined as the origin for quality Oviduetus Ranae.

[The studies on the chemical components of trutleback].

OBJECTIVE: Studies on the substance with nourishment Yin for a reasonable and rational auality appraise for turtleback. METHOD: To separate by chromatography and identifying with MS, 1H NMR, 13C NMR, IR. RESULT: Two compounds were separated and identified as hexadecanoyl cholesterol ester and cholesterol. CONCLUSION: The two compounds are isolated from turtleback for the first time.