53 results about "Extracellular signal" patented technology

Provided herein are compounds and methods of using compounds that selectively inhibit binding to one or more docking domain regions of an extracellular signal-regulated kinase (ERK) to inhibit in a cell having an extracellular signal-regulated kinase activity. Such methods may be used to inhibit cell proliferation of a neoplastic cell, to treat a cancer and further may be used in conjunction with administration of an anticancer drug at a reduced dosage to treat a cancer with a concomitant reduction in toxicity to an individual receiving the treatment. Also provided is a method to design and screen for compounds to inhibit binding within the extracellular signal-regulated kinase docking domain region, using at least in part computer-aided drug design modeling.

The invention discloses a compound with an MEK (Mitogen-activated and Extracellular signal-regulated Kinase) inhibiting function as well as a preparation method and application of the compound. The structure of the compound disclosed by the invention is as shown in a formula (I). The preparation method of the compound disclosed by the invention comprises the steps of forming a coumarin ring by adopting a Pechmann reaction mainly and carrying out structural modification of different sites. In the binding experiment of the compound disclosed by the invention and MEK, the binding activity is up to 54.57nM; the anti-proliferation effect IC50 (half maximal inhibitory concentration) value on the melanoma cell A375 is up to 1.23 micrometers; the anti-proliferation effect IC50 value on the colon cancer cell HT-29 is up to 2.13 micrometers; and the activity is higher than that of a positive control U0126. The novel structure type coumarins compound with the MEK inhibiting function shows good MEK binding activity, MEK inhibiting activity, ERK (Extracellular signal Regulated Kinase) pathway inhibiting activity, anti-tumor effect and antiviral effect and has broad application value. The formula (I) is as shown in the specification.

The invention discloses a novel CAR (Chimeric Antigen Receptor) and application of novel CAR modified T cells for treating cancer. The novel CAR is formed by an extracellular signal peptide, an antigen binding structural domain, an intracellular first conduction structural domain and an intracellular second conduction structural domain, and contains an intracellular first conduction structural domain NKp44 or an intracellular first conduction structural domain TREM1. According to the novel CAR disclosed by the invention, multiple CAR nucleotide sequences are separated and purified, and the CARand CAR-T cells which specifically aims at CD19 malignant hematologic tumor and mesothelin malignant solid tumor antigens. In a hematologic tumor and solid tumor killing test, the killing capacity ofthe CAR-T cells to tumor cells is obviously enhanced, and good safety and good anti-tumor activity in clinic application are expressed.

Disclosed are peptides having SEQ ID NOs: 1 to 24 that induce superoxide generation by human monocytes or neutrophils; that induce an intracellular calcium increase by human peripheral blood monocytes or neutrophils; binds to formyl peptide receptor or formyl peptide receptor-like 1; that induce chemotactic migration of human monocytes or neutrophils in vitro; that induce degranulation in formyl peptide receptor expressing cells or formyl peptide receptor-like 1 expressing cells; that stimulate extracellular signal regulated protein kinase phosphorylation via activation of formyl peptide receptor or formyl peptide receptor-like 1; or that stimulate Akt phosphorylation via activation of formyl peptide receptor or formyl peptide receptor-like 1.

The invention discloses application of an engineered T cell with an immune receptor for treatment of cancer. A chimeric antigen receptor consists of an extracellular signal peptide, an antigen bindingstructural domain, a first intracellular conduction structural domain and a second intracellular conduction structural domain and comprises the first intracellular conduction structural domain in theform of the immune receptor. The invention provides a plurality of amino acid sequences of the chimeric antigen receptor and provides the chimeric antigen receptor specific for CD19 malignant hematological tumors and CAR-T cells. In a blood tumor killing test, the ability of the CAR-T cells to kill tumor cells is significantly improved, and high safety and high antitumor activity are shown in clinical application.

The invention relates to a sorafenib tosylate-hydroxypropyl-beta-cyclodextrin clathrate compound and a preparation method thereof. Sorafenib plays the role of anticancer by inhibiting RAS/RAF/MEK (methyl ethyl ketone)/ERK (extracellular signal-regulated kinase) signal conducting channels and inhibiting tumor angiogenesis, and is directed to cancer cells instead of normal cells. The sorafenib is almost insoluble in water, and the average relative bioavailability of oral administration is 38% to 49%. According to the preparation method of the invention, the sorafenib tosylate-hydroxypropyl-beta-cyclodextrin clathrate compound is prepared based on the clathrate compound-forming property of hydroxypropyl-beta-cyclodextrin, thereby increasing medicine dissolvability, improving medicine dissolution and raising medicine bioavailability.

The present invention relates to a melanin biosynthesis inhibitor containing terrein compound as an effective ingredient. The terrein compound can be easily separated from Penicillium sp KCTC 26245, a fungal strain inhabited in domestic soil. It does not directly inhibit tyrosinase but inhibits the expression of MITF (microphthalmia-associated transcription factor) by activating ERK (extracellular signal-regulated kinase) in melanin chromatocytes to give whitening effect. So, the melanin biosynthesis inhibiting effect of the compound is much greater than that of any other conventional inhibitors, and further the effect can be raised when the compound is used together with other inhibitors, owing to their different mechanisms. Thus, the compound of the present invention can be effectively used as a skin trouble treating agent, a skin whitening agent and a browning inhibitor.

The invention discloses a polypeptide capable of regulating the activity of FGFR2 (Fibroblast Growth Factor Receptor 2). The amino acid sequence of the polypeptide is Asn-Leu-Gly-Gln-Glu-Leu-Ala-Phe-Arg-Val-Pro-Asn. The polypeptide disclosed by the invention can be specifically combined with the FGFR2, plays an obviously regulating role on the activity of the FGFR2, can outstanding inhibit the activity of p-ERK (Phospho-Extracellular Signal-Regulated Kinase) contained in the main downstream signal channel MAPK (Mitogen Activated Protein Kinase) of the FGFR2, has the advantages of low molecular weight, easiness for preparation, controllability in quality, low immunogenicity and the like and has good potential application value in the field of medicines.

The present disclosure provides a system for regulating expression of a target polynucleotide in a cell. The system may comprise a chimeric polypeptide comprising a gene modulating polypeptide fused in-frame with a heterologous nuclear localization domain. The heterologous nuclear localization domain may be operable to translocate the chimeric polypeptide to a cell nucleus upon activation by an active cellular signaling pathway. The cellular signaling pathway may be inducible in response to an extracellular signal. In response to the extracellular signal, the chimeric polypeptide may localizeto the cell nucleus and the gene modulating polypeptide may regulate expression of a target polynucleotide in the cell nucleus.

The invention discloses an application of Vandetanib to preparation of a targeted EphB4 anti-tumor drug, and belongs to the technical field of medicines. Experiments verify the application of the Vandetanib, and a molecular docking method, an SPR (surface plasmon resonance) method and MST (modulated scatterer technique) experiment results indicate that the Vandetanib can interact with EphB4. EphB4kinase experiments display that the Vandetanib can obviously inhibit EphB4 kinase activity. Proliferation of leukemic cells K562, JLTRG and H9 is remarkably inhibited. Besides, the Vandetanib remarkably inhibits expression of signal molecules p-PI3K p85/p55 and PI3K p85 at the downstream of the EphB4, and the phosphorylation level of MEK (methyl ethyl ketone) and ERK (extracellular signal-regulated kinase) is reduced. Therefore, the experiment results sufficiently support the application of the Vandetanib to an anti-leukemia drug and the targeted EphB4 anti-tumor drug.

Methods for treating intestinal inflammation by inhibiting Clostridium difficile toxin B-mediated activation of the epidermal growth factor receptor or by inhibiting Clostridium difficile toxin B-mediated activation of the extracellular signal-regulated kinase 1/2 are described.

Oxygen toxicity is one of the major risk factors in the development of the chronic lung disease or bronchopulmonary dysplasia in premature infants. Using proteomic analysis, we discovered mitochondrial aldehyde dehydrogenase (mtALDH or ALDH2) was down-regulated in neonatal rat lung after hyperoxic exposure. To study the role of mtALDH in hyperoxic lung injury, we overexpressed mtALDH in human lung epithelial cells (A549) and found that mtALDH significantly reduced hyperoxia-induced cell death. Compared to control cells (Neo-A549), the necrotic cell death in mtALDH overexpressing cells (mtALDH-A549) decreased from 25.3% to 6.5%, 50.5% to 9.1% and 52.4% to 15.06% after 24-, 48- and 72-hour hyperoxic exposure, respectively. The levels of intracellular and mitochondria-derived reactive oxygen species (ROS) in mtALDH-A549 cells after hyperoxic exposure were significantly lowered compared to Neo-A549 cells. mtALDH overexpression significantly stimulated extracellular signal regulated kinase (ERK) phosphorylation under normoxic and hyperoxic conditions. Inhibition of ERK phosphorylation partially eliminated the protective effect of mtALDH in hyperoxia-induced cell death, suggesting ERK activation by mtALDH conferred cellular resistance to hyperoxia. mtALDH overexpression augmented Akt phosphorylation and maintained the total Akt level in mtALDH-A549 cells under normoxic and hyperoxic conditions. Inhibition of PI3K activation by LY294002 in mtALDH-A549 cells significantly increased necrotic cell death after hyperoxic exposure, indicating that PI3K/Akt activation by mtALDH played an important role in cell survival after hyperoxia. Taken together, these data demonstrate that mtALDH overexpression attenuates hyperoxia-induced cell death in lung epithelial cells through reduction of ROS, activation of ERK/MAPK and PI3K/Akt cell survival signaling pathways.

The invention relates to the technical field of biology. High expression of kinase insert domain receptors (KDR) and platelet-derived growth factor receptors alpha (PDGFRA) can be viewed in multiple tumor tissues; and sorafenib directly inhibits tumor growth by inhibiting the activities of the KDR and the PDGFR and inhibiting a recombinant activated factor/ methyl ethyl ketone/ extracellular signal-regulated kinase (RAF/ MEK/ ERK) signal transduction pathway, and blocks the formation of new tumor vessels by inhibiting vascular endothelial growth factors (VEGF) and platelet-derived growth factors (PDGF), so that the sorafenib achieves double inhibiting and multi-target blocking anti-hepatic cell carcinoma (HCC) effects. Detection of KDR and PDGFR mRNA levels can assist doctors in forecasting the curative effect of medicaments and the clinical outcome of patients, and has important clinical significance. The invention aims to provide a kit capable of quickly, conveniently, sensitively and specifically detecting expression quantities of related genes KDR and PDGFRA of a sorafenib chemotherapeutic medicament. According to the kit, the KDR and PDGFR mRNA levels are detected by adopting a fluorescent quantitative polymerase chain reaction (PCR) technology with high sensitivity and specificity, so that the sensitivity and the specificity are remarkably improved; and the kit is quick in detection and high in flux, and can finish the detection in 3 to 4 hours.

The invention belongs to the field of biochemical engineering, and in particular relates to a chemical synthetic method of a low affinity ligand of an oxidized low density lipoprotein receptor CD36. The method comprises the following steps of: carrying out a chemical reaction on 4-Dimethylaminopyridine, N, N'-Dicyclohexylcarbodiimide, azelaic acid and 7-ketocholesterol; and obtaining oxLig-1 through extraction, sample mixing, packing, purification and collection. Experiments show that the chemically synthesized oxLig-1 has same physiological activity with that of oxLig-1 separated and purified from oxLDL (oxidized low density lipoprotein), and the oxLig-1 activates cell signaling mediated by CD36. According to the chemical synthetic method disclosed by the invention, oxLig-1 is synthesized by the chemical method, and oxLig-1 has a completely consistent chemical structure with that of the low affinity ligand of CD36 and can activate ERK (Extracellular Signal-Regulated Kinase) and JNK (Jun N-Terminal Kinase) and up-regulate expression of a cholesterol outflow gene, namely, a triphosadenine binding cassette transporter A1 (ABCA1).

The invention discloses a medicine T-VISA-PEA15 capable of effectively and specifically killing breast cancer cells. The sequence of a T-VISA-PEA15 therapy vector capable of effectively and specifically killing the breast cancer cells is shown as SEQ ID NO.1. A liposome of the medicine T-VISA-PEA15 liposome capable of effectively and specifically killing the breast cancer cells comprises a liposome and the T-VISA-PEA15 therapy vector coated by the liposome, wherein the nucleotide sequence of the T-VISA-PEA15 therapy vector is shown as SEQ ID NO.1. After being coated by the liposome and transferred, the T-VISA-PEA15 therapy vector is enriched on the breast cancer part, so as to effectively target the breast cancer ERK (extracellular signal-regulated kinase) target point and inhibit the breast cancer ERK target point from entering the nucleus, thereby promoting the apoptosis of tumor cells, but not killing the normal cells. The medicine T-VISA-PEA15 can be applied to a whole body and has of the advantages of high gene expression amount, long gene expression time, high gene expression efficiency, definite efficacy, low toxicity and side effect, no toxicity to liver and kidneys and wide prospect in the treatment of the breast cancer.

The invention provides a fungus secretory expression vector as well as a construction method and application thereof. The fungus secretory expression vector is a fungus secretory expression vector 74HSP formed by inserting extracellular signal peptide of a Six1d secretory protein N-terminal 23aa (MAPYSMVLLGALSILGFGAYAQE) into a 4665bp position of a pCT74 vector. According to the invention, a fungus secretory expression vector capable of effectively secreting plant protein to the outside of the pathogenic bacteria cell is successfully constructed and the target protein is effectively expressedin fungus and secreted into the plant in the infection process, so that the rapid identification of the plant gene function is realized.