16 results about "Cellular oxygen" patented technology

The invention relates to the technical field of biological medicines, and particularly discloses a nanocapsule SMCPM and application thereof in medicines for treating or preventing osteosarcoma and pulmonary metastasis. The SMCPM is composed of a photosensitizer Ce6 carried by mesoporous silicon oxide-manganese oxide particles, an NRF2 inhibitor ML385 and an OS targeting peptide PT-7. Experiments prove that the SMCPM is high in penetrating power and strong in cell killing effect; by down-regulating NRF2 expression and reversing nuclear translocation, a biochemical inhibitory microenvironment can be effectively repaired, the tolerance of cells to active oxygen and epithelial-mesenchymal transition activated and induced by a NOTCH1 signal axis are remarkably reduced, the oxidative stress level of the cells is enhanced, and PIT-induced immunogenic cell death is promoted; the released Mn < 2 + > and double-stranded DNA can regulate and control an immunosuppressive microenvironment by activating an STING pathway in cells, thereby inhibiting the growth of osteosarcoma and preventing lung metastasis.

The application discloses application of cell endogenous metabolites in preparation of medicines for treating and / or preventing aging. The cell endogenous metabolites are any one or combination of phosphocreatine, hypotaurine and / or phosphoethanolamine. The application finds that phosphocreatine, hypotaurine and phosphoethanolamine can effectively restore cell growth, reduce cell SA-beta-Gal staining intensity, improve cell mitochondrial function and increase ATP yield, restore cell mitochondrial membrane potential, alleviate damage caused by cell oxidative stress and premature aging, and also prolong the life of nematodes and restore exercise capacity in the middle of aging. Meanwhile, the three metabolites have a synergistic effect, and by adjusting the matching concentration of the three metabolites, the same cell protection effect can be achieved by mixed administration. Since the endogenous metabolites are accurate, efficient and safe, the three cell endogenous metabolites provided by the application can be used for preparing anti-aging medicines.

The present disclosure provides the use of catalase or a variant thereof or a nucleic acid sequence or a carrier or a delivery system in the preparation of a pharmaceutical composition or a cosmetic composition for scavenging reactive oxygen species (ROS), alleviating oxidative stress.

The application discloses a two-photon fluorescent probe and uses the same for tumor microenvironment monitoring. The application opens the two-photon fluorescent characteristics of the material by responding to the overexpression of SO2 and H2O2 at the tumor site in stages, monitors and indicates the changes of cell oxidative stress and homeostasis balance, and is further used for early diagnosis of diseases caused by internal environment homeostasis imbalance. The application regulates the cancer cell uptake capacity of the molecule by introducing suitable lipophilic and hydrophilic groups, increases the recognition site of biological thiols by introducing conjugated olefin bonds, and further realizes the step-by-step recognition of endogenous signal molecules by using the easiness of substitution reaction, enhances the fidelity of the signal, and is expected to realize the in-situ activated two-photon fluorescence, early and accurate diagnosis of a series of diseases such as cardiovascular diseases, Alzheimer's disease and the like induced by internal environment homeostasis imbalance.

The invention belongs to the technical field of biological medicine, and particularly relates to superoxide dismutase HSTM-SOD and application thereof. The amino acid sequence of the superoxide dismutase HSTM-SOD provided by the invention is selected from at least one of sequences as shown in SEQ ID NO: 1 to SEQ ID NO: 8, or a sequence with more than 80% of homology with the amino acid sequence. The HSTM-SOD with different sequences, which is provided by the invention, generally has excellent thermal stability, pH stability, good compatibility and super-strong membrane crossing capability; the HSTM-SOD shows remarkable capabilities in the aspects of promoting cell sunburn repair, promoting cell oxidative damage repair, resisting ferroptosis caused by TalaA, promoting wound healing of diabetic patients, improving age-related macular degeneration and the like, and has a wide application prospect.

The application provides application of pig's tooth saponin volatile oil in preparation of a medicine for treating cerebral ischemia-reperfusion injury, and a preparation method of the pig's tooth saponin volatile oil is as follows: pig's tooth saponin decoction pieces are taken, water and n-hexane are added, and volatile oil is obtained through steam distillation; the volatile oil is collected, anhydrous sulfuric acid is added, and water is removed; and the mixture is left overnight to obtain the pig's tooth saponin volatile oil. The prepared pig's tooth saponin volatile oil acts on key target points of VEGFA, SRC, MAPK8, PIK3CA and TNF through active ingredients of paeonol, linalool, methyl eugenol, anethole and eugenol, regulates multiple signal pathways of sphingolipids, TNF and VEGF, inhibits cell oxidative stress injury, inhibits release of inflammatory factors and regulates nerve function, so as to play a role in treating cerebral ischemia-reperfusion injury, and lay a foundation for further in-depth study on a treatment mechanism of pig's tooth saponin in treating 'opening the orifices and connecting the heart and the lung'.

The present disclosure provides compositions and methods for producing hydrogel matrix constructs. Methods of using hydrogel matrix constructs for tissue repair and regeneration and for the oxygenation of red blood cells are also disclosed.

The invention provides a preparation method of 5-methyl kaempferol carbon quantum dots. The method has the advantages that a green synthesis process is adopted, the safety is high, and the biocompatibility is good; the carbon quantum dots of the 5-methyl kaempferol prepared by the invention are used as an efficient ROS (reactive oxygen species) scavenger, have obvious antioxidant and anti-inflammatory effects, can obviously reduce oxidative injury of pulmonary epithelial cells, and can effectively promote lung injury repair of acute lung injury; compared with common kaempferol, the prepared carbon quantum dot of 5-methyl kaempferol has higher anti-inflammatory activity and better intracellular delivery efficiency, and has a better repairing effect on acute lung injury.

The subject invention relates to a novel compound and method for treating cancer in a subject using photodynamic therapy (PDT). The novel compound comprises zinc(II) phthalocyanine substituted with two or four nitric oxide (NO)-releasing moieties that release NO upon interaction with the intracellular glutathione, which reduces the cellular oxygen consumption rate, thus relieving the hypoxic status of cancer cells. Upon light irradiation, the novel compound generates reactive oxygen species (ROS), induces cytotoxicity under a hypoxic condition, overcoming the oxygen-dependent nature of PDT, and elicits the release of damage-associated molecular patterns, inducing the maturation of dendritic cells and triggering an antitumor immune response.

The application provides a near-infrared response magnesium-releasing and antioxidant double-layer microneedle and a preparation method and application thereof. The double-layer microneedle comprises a needle tip layer and a backing layer, the needle tip layer contains MoS2@PDA@Mg 2+ The application discloses a composite particle, which is composed of molybdenum disulfide nanosheets, surface-coated polydopamine and coordination-loaded magnesium ions. The preparation method comprises the following steps: one-step reaction of molybdenum disulfide, dopamine and magnesium salt to obtain the composite particle, and then preparation of the composite particle into a needle tip layer precursor solution together with GelMA, PVA and the like, and two-step light cross-linking molding with a backing layer precursor solution. The double-layer microneedle can rapidly release magnesium ions under near-infrared irradiation, the release amount is 4.6 times that of a non-irradiation group, can significantly scavenge DPPH, ABTS and other free radicals, can relieve cell oxidative stress induced by lipopolysaccharide, and can effectively promote new bone formation and trabecular reconstruction in a rat tooth socket model. The application realizes the synergistic effect of light-controlled magnesium release and antioxidant, and is suitable for the fields of neural microenvironment reconstruction and bone regeneration.

The invention provides a preparation method of carnosic acid carbon quantum dots. The method has the advantages that a green synthesis process is adopted, the safety is high, and the biocompatibility is good; the carbon quantum dots of the carnosic acid carbon quantum dots prepared by the preparation method disclosed by the invention are used as an efficient ROS scavenger, have remarkable antioxidant and anti-inflammatory effects, can remarkably reduce oxidative injury of pulmonary epithelial cells, and can effectively promote lung injury repair of acute lung injury; compared with carnosic acid, the carnosic acid carbon quantum dot prepared by the invention has higher anti-inflammatory activity and better intracellular delivery efficiency, and has a better repair effect on acute lung injury.

This invention belongs to the field of biomedical technology and discloses the application of the small molecule tripeptide Ser-Ser-Cys (SSC) in inhibiting the phenotypic transformation of vascular smooth muscle cells (VSMCs). SSC is an endogenous differentially expressed tripeptide screened and identified from the serum of hypertensive non-atherosclerotic patients using non-targeted metabolomics technology. In vitro experiments show that SSC can effectively inhibit angiotensin II (Ang II)-induced abnormal proliferation, migration, and phenotypic transformation from contractile to synthetic VSMCs. Its mechanism of action is related to the regulation of the Keap1 / Nrf2 signaling pathway, improvement of cellular oxidative stress, and mitochondrial function. This invention provides a new approach for using SSC in the preparation of drugs or functional foods for the prevention and treatment of hypertension-related vascular remodeling.

The invention provides application of a PPP1R15A gene in regulation and control of oxidative stress of cells, and belongs to the technical field of gene engineering. Experiments show that oxidative stress of bovine mammary epithelial cells can be inhibited by inhibiting expression of the PPP1R15A gene. The invention also provides an application of the siRNA for knocking out or inhibiting expression of the PPP1R15A gene in preparation of a medicine for inhibiting oxidative stress of cells, wherein the sequence of the siRNA is shown as SEQ ID NO.11 and SEQ ID NO.12. The invention also provides an application of the siRNA for knocking out or inhibiting expression of the PPP1R15A gene in preparation of a medicine for inhibiting oxidative stress of the cells. The siRNA provides a new direction for searching a novel anti-oxidative stress treatment strategy.

The present disclosure provides compositions and methods for producing hydrogel matrix constructs. Methods of using hydrogel matrix constructs for tissue repair and regeneration and for the oxygenation of red blood cells are also disclosed.

The invention discloses an oleic acid-crocetin compound preparation and application thereof, oleic acid and crocetin are adopted to form a mixed system to act on PC12 cells damaged by H2O2 induced oxidation, the survival rate of the PC12 cells can be obviously improved compared with the single use of crocetin with the same concentration, and the obvious effect does not exist after linoleic acid and linolenic acid are mixed with crocetin. The invention reveals that oleic acid can enhance the cell oxidative damage resistance of crocetin, provides a brand new scheme for research and development of reagents or compositions for resisting cell oxidative damage, and has important biomedical application value.

The invention provides application of an antioxidant XJB-5-131 in preparation of a preparation for relieving nano-plastic induced mammary epithelial barrier injury, and belongs to the technical field of medicines. According to the application disclosed by the invention, the influence of PS-NH2 on cell oxidative stress, mitochondrial function, iron metabolism and barrier function related protein expression is researched through an intervention experiment of a ferroptosis accelerant tert-butyl hydroperoxide and an antioxidant XJB-5-131. The result shows that the XJB-5-131 can be used for relieving the mitochondrial injury of the EpH4-Ev cells caused by the exposure of the PS-NH2, and relieving the ferroptosis and intercellular junction injury of the EpH4-Ev cells induced by the exposure of the PS-NH2.