Discovery of neddylation E2s inhibitors with therapeutic activity.

Neddylation is the writing of monomers or polymers of neural precursor cells expressed developmentally down-regulated 8 (NEDD8) to substrate. For neddylation to occur, three enzymes are required: activators (E1), conjugators (E2), and ligators (E3). However, the central role is played by the ubiquitin-conjugating enzymes E2M (UBE2M) and E2F (UBE2F), which are part of the E2 enzyme family.

Curriculum vitae of HDAC6 in solid tumors.

Histone deacetylase 6 (HDAC6) is the only member of the HDAC family that resides primarily in the cytoplasm with two catalytic domains and a ubiquitin-binding domain. HDAC6 is highly expressed in various solid tumors and participates in a wide range of biological activities, including hormone receptors, the p53 signaling pathway, and the kinase cascade signaling pathway due to its unique structural foundation and abundant substrate types. Additionally, HDAC6 can function as an oncogenic factor in solid tumors, boosting tumor cell proliferation, invasion and metastasis, drug resistance, stemness, and lowering tumor cell immunogenicity, so assisting in carcinogenesis.

Generation, secretion and degradation of cancer immunotherapy target PD-L1.

Cancer immunotherapy is a rapidly developing and effective method for the treatment of a variety of malignancies in recent years. As a significant immune checkpoint, programmed cell death 1 ligand 1 (PD-L1) and its receptor programmed cell death protein 1 (PD-1) play the most significant role in cancer immune escape and cancer immunotherapy. Though PD-L1 have become an important target for drug development and there have been various approved drugs and clinic trials targeting it, and various clinical response rate and adverse reactions prevent many patients from benefiting from it.

LSD1 deletion decreases exosomal PD-L1 and restores T-cell response in gastric cancer.

Background: Histone lysine-specific demethylase 1 (LSD1) expression has been shown to be significantly elevated in gastric cancer (GC) and may be associated with the proliferation and metastasis of GC. It has been reported that LSD1 repressed tumor immunity through programmed cell death 1 ligand 1 (PD-L1) in melanoma and breast cancer. The role of LSD1 in the immune microenvironment of GC is unknown.

SDC: An integrated database for sex differences in cancer.

Sex differences are evident in the incidence and mortality of diverse cancers. With the development of personalized approaches in cancer treatment, the impact of sex differences has not been systematically incorporated into preclinical and clinical cancer research. The molecular mechanisms underlying sex differences in cancer have not been elucidated.

Identification of the upstream regulators of KDM5B in gastric cancer.

Aims: Lysine-specific demethylase 5B (KDM5B) is an epigenetic regulator of chromatin that catalyzes the demethylation of histone 3 lysine 4. It is overexpressed in multiple cancer types and acts as a therapeutic target in cancer therapy. Nevertheless, its upstream regulatory pathway is not completely understood, prompting the search for the underlying biological factors driving KDM5B overexpression.

Lysine demethylase LSD1 delivered via small extracellular vesicles promotes gastric cancer cell stemness.

Several studies have examined the functions of nucleic acids in small extracellular vesicles (sEVs). However, much less is known about the protein cargos of sEVs and their functions in recipient cells. This study demonstrates the presence of lysine-specific demethylase 1 (LSD1), which is the first identified histone demethylase, in the culture medium of gastric cancer cells.

Insights into non-symbiotic plant growth promotion bacteria associated with nodules of Sphaerophysa salsula growing in northwestern China.

In addition to rhizobia, other non-symbiotic endophytic bacteria also have been simultaneously isolated from the same root nodules. The existence of non-symbiotic endophytic bacteria in leguminous root nodules is a universal phenomenon. The vast majority of studies have detected endophytic bacteria in other plant tissues.

Synthesis and biological evaluation of novel Jiyuan Oridonin A-1,2,3-triazole-azole derivatives as antiproliferative agents.

As a continuation of our research on developing potent and potentially safe anti-proliferative agents, two series of novel Jiyuan Oridonin A-1,2,3-triazole-azole hybrids were designed, synthesized and evaluated for their anti-proliferative activity against four selected cancer cell lines (MGC-803, MCF-7, PC-3, Eca-109). Some compounds with better growth inhibitory effects were chosen to carry out further studies in A549 and SMMC-7721. Most of the synthesized compounds exhibited moderate to good activity against all the cancer cell lines selected.

Design, synthesis and biological mechanisms research on 1,2,3-triazole derivatives of Jiyuan Oridonin A.

Two series of derivatives with 1,2,3-triazole as heterocyclic moiety of Jiyuan Oridonin A, a new ent-kaurene diterpenoid which was isolated from genus Isodon rubescens, were synthesized and biologically evaluated. All the derivatives possessed good anti-proliferative activities. Among them, compound 8g was found to significantly induce cell apoptosis and cell cycle arrest in MGC-803 via a series of signals activated by the increased intracellular ROS levels.

Antagonistic endophytic bacteria associated with nodules of soybean (Glycine max L.) and plant growth-promoting properties.

A total of 276 endophytic bacteria were isolated from the root nodules of soybean (Glycine max L.) grown in 14 sites in Henan Province, China. The inhibitory activity of these bacteria against pathogenic fungus Phytophthora sojae 01 was screened in vitro.

Rapid Identification and Characterization of Francisella by Molecular Biology and Other Techniques.

Francisella tularensis is the causative pathogen of tularemia and a Tier 1 bioterror agent on the CDC list. Considering the fact that some subpopulation of the F. tularensis strains is more virulent, more significantly associated with mortality, and therefore poses more threat to humans, rapid identification and characterization of this subpopulation strains is of invaluable importance.

Use of a Force-Torque Sensor for Self-Calibration of a 6-DOF Medical Robot.

The aim of this paper is to improve the position accuracy of a six degree of freedom medical robot. The improvement in accuracy is achieved without the use of any external measurement device. Instead, this work presents a novel calibration approach based on using an embedded force-torque sensor to identify the robot's kinematic parameters and thereby enhance the positioning accuracy.

[Screening and inhibition of antagonistic endophytic bacteria isolated from soybean (Glycine max)nodules against Alternaria longipes.].

Using Alternaria longipes as tested phytopathogen, endophytic bacteria isolated from soybean nodules were selected to study antagonistic effects by confrontation and metabolic liquid culture methods. The inhibited hyphae were determined by microscopic observation, and the screened strains were characterized by cell culture, physiological and biochemical tests, 16S rDNA sequencing, phylogenetic analysis and inoculation trials in greenhouse. The results indicated that the seven of the endophytes exerted more than 42% inhibitory effects after the first and the second screening.

[Screening probiotic endophytic bacteria from medicinal plant flex cornuta and the phytopathogen-inhibiting effect].

Culturable endophytic bacteria were isolated from medicinal plant Ilex cornuta by plate-spreading method, strains with strong inhibitory effect on phytopathogen were screened by confrontation culture and fermentation filtrate culture methods, and the morphological changes of phytopathogen hyphae treated with endophytic bacteria were examined by microscopy and micrograph. Their phylogenetic relationships were determined by homology analysis of the 16S rDNA sequences of PCR products and the taxonomic status of the selected strains was determined based on their morphology, physiology, biochemical test results and 16S rDNA sequence analysis. A total of 85 endophytic bacteria were isolated from the healthy roots, stems, leaves and fruits of I.

Colonization and plant growth promoting characterization of endophytic Pseudomonas chlororaphis strain Zong1 isolated from Sophora alopecuroides root nodules.

The endophytic strain Zong1 isolated from root nodules of the legume Sophora alopecuroides was characterized by conducting physiological and biochemical tests employing gfp-marking, observing their plant growth promoting characteristics (PGPC) and detecting plant growth parameters of inoculation assays under greenhouse conditions. Results showed that strain Zong1 had an effective growth at 28 ºC after placed at 4-60 ºC for 15 min, had a wide range pH tolerance of 6.0-11.

Diversity of endophytic bacteria within nodules of the Sphaerophysa salsula in different regions of Loess Plateau in China.

A total of 115 endophytic bacteria were isolated from root nodules of the wild legume Sphaerophysa salsula grown in two ecological regions of Loess Plateau in China. The genetic diversity and phylogeny of the strains were revealed by restriction fragment length polymorphism and sequencing of 16S rRNA gene and enterobacterial repetitive intergenic consensus-PCR. Their symbiotic capacity was checked by nodulation tests and analysis of nifH gene sequence.

Paracoccus sphaerophysae sp. nov., a siderophore-producing, endophytic bacterium isolated from root nodules of Sphaerophysa salsula.

An aerobic, brown-pigmented, non-spore-forming, endophytic bacterium, designated strain Zy-3(T), was isolated from root nodules of Sphaerophysa salsula, a native leguminous herb belonging to the family Leguminosae growing in north-western China. Cells of strain Zy-3(T) were non-motile, Gram-negative rods. Strain Zy-3(T) produced siderophores and showed antifungal activity.