752 results about "HeLa" patented technology

The invention provides a DNA detection and analysis method based on Cas9 nuclease and application thereof. The method comprises the following three steps: (1) carrying out PCR amplification on targetDNAs; (2) treating a PCR amplification product by using a CAT method; and (3) carrying out PCR amplification with DNAs treated by using the CAT method as a template. The method can successfully detectL1 and E6 / E7 genes of HPV16 and HPV18 in human cervical carcinoma cells. According to the invention, the method successfully avoids current key bottleneck problems in nucleic acid hybridization, designing of specific PCR primers and the like in the fields of nucleic acid detection and typing.

Polynucleotides, as well as polypeptides encoded thereby, that are differentially expressed in SCCC cells are provided. The polynucleotides find use in diagnosis of cancer, and classification of cancer cells according to expression profiles. The methods are useful for detecting cervical cancer cells, facilitating diagnosis of cervical cancer and the severity of the cancer (e.g., tumor grade, tumor burden, and the like) in a subject, facilitating a determination of the prognosis of a subject, and assessing the responsiveness of the subject to therapy.

The invention provides polypeptide. The structural formula of the polypeptide is as shown below (the structural formula is shown in the description). The invention further provides a polypeptide-siRNAinduction coassembly which is composed of polypeptide and siRNA. The invention further provides application of the polypeptide-siRNA induction coassembly to cell carrying. The invention further provides application of the polypeptide-siRNA induction coassembly to preparation of drugs for treating cervical cancer. After polypeptide and target siRNA are mixed and hatched for 5 minutes at the room temperature, stable and uniform nano particles can be formed. A cytotoxicity test proves that the coassembly nano particles have high biocompatibility, and the cytotoxicity and hemolysis toxicity of the coassembly nano particles are both low. A cell proliferation resistant test further verifies that the polypeptide-siRNA nano particles can effectively block a cervical cancer cell line HeLa in the G2 stage, so that growth of the cervical cancer line HeLa is hindered.

The invention relates to a surface-enhanced Raman technology based on signal-off and used for detecting intracellular telomerase activity. According to the technology, graphene, carbon nitride, MoS2, SiO2 and the like are taken as carriers, nano-gole or nano-silver with controllable dimension and morphology or a composite magnetic nano-particle with a core-shell structure is supported by the carriers, and then a hairpin probe containing a telomerase primer and a Raman molecule beacon is fixedly disposed on the nano=particle surface, so that the high-sensitivity high-selectivity SERS detection method based on signal-off is established. When a target exists, the primer extends and generates a DNA chain with a repeat sequence under the effect of telomerase, and the DNA chain is hybridized with the probe molecule, then the DNA hairpin structure is opened, a Raman signal molecule with the single-chain labeled end is far away from a Raman substrate, the Raman signal is reduced, and high-sensitivity detection on telomerase is realized. The probe prepared by taking Hela cervical carcinoma cell as a model realizes intracellular telomerase activity detection and dynamic detection on intracellular telomerase activity variation under effect of a telomerase inhibiting medicament. By using multiple cells for imaging, the probe is confirmed to be capable of distinguishing tumor cells and normal cells.

The invention discloses a water-soluble perylene bisimide compound and an application of a water-soluble perylene bisimide compound for preparing DNA intercalators, inhibiting cancer cell growth and resisting tumors, belonging to the technical field of biological drug chemical synthesis. A cationic amino functional group is introduced into perylene derivatives and single perylene systems, so that the water solubility is greatly improved, the amino functional group is bound to light stability of perylene derivatives, and a series of novel water-soluble perylene bisimide compounds are obtained. The synthetic compound can be effectively embedded into DNA double helix base pairs of the cell nucleus and can serve as a DNA intercalator. The synthetic compound has a planar rigid structure, can be specifically enriched on a fixed tissue cell nucleus, is high in fluorescence intensity and easy in fluorescence imaging and can be compared favorably with commercial cell nucleus dyes DAPI. The synthetic compound can effectively inhibit growth of cancer cells such as U2OS, HCT116, HeLa and AGS, has an obvious antitumor effect and can be applied to preparing antitumor drugs.

The invention discloses a water soluble mitochondrial targeting imaging probe and a preparation method thereof. The structural formula of compounds that form the water soluble mitochondrial targeting imaging probe can be formula (I), (II), (III), (IV), (V), or (VI). The water soluble mitochondrial targeting imaging probe has the characteristics of good water solubility, high resistance to photo-bleaching, high thermal stability, low toxicity, and high sensitivity. Hela, MCF-7, and NIH-3T3 cells are taken as the models to observe the distribution situation of the fluorescent probe in cells through a laser con-focal microscopy technology; the results show that the probe is mainly distributed in mitochondrial, and the targeting property is good. The test results show that the provided probe has the characteristic of strong mitochondrial targeting imaging performance on cancer cells and non-cancer cells; thus an effective means is provided for quantitatively research superoxide radicals in cells in time and space, and thus the pathologic and physiological mechanisms of active oxygen radicals can be researched.

The invention discloses a new medical application of oleanolic acid in cervical cancer resistance, and also discloses clinically acceptable pharmaceutical preparations such as tables, capsules, pills, injections and the like which are prepared by using oleanolic acid as a pharmaceutical raw material. The oleanolic acid pharmaceutical preparation of the present invention comprises 1%-99% of oleanolic acids and 99%-1% medicinal excipients (including other compatible drugs). The oleanolic acid and the pharmaceutical preparations thereof provided by the invention have an excellent anti-cervical cancer effect which is represented by significant inhibitory activity against in vitro human cervical cancer cells and significant tumor inhibitory activity against a transplanted tumor in nude mice of the cancer cell. In addition, the active components of the pharmaceutical preparation are traditional Chinese medicine extracts, so the preparation has the advantage of less toxic and side effect than chemotherapeutic drugs.

The present invention is application of medicine carrying chitosan-fatty acid grafting micelle in preparing targeting antitumor medicine carrier, especially antitumor medicine carrier targeting to lung cancer cell nucleus, cervical carcinoma cell nucleus and mammary cancer cell nucleus. The chitosan-fatty acid grafting micelle of the present invention has grafting carrier with low toxicity, and may be ingested fast by cell nucleus to target to cell nucleus and to raise the curative effect of antitumor medicine by up to 80 times. It has cell nucleus targeting function of permeating cell membrane fast with less destruction by intracellular lysosome. The grafting micelle with hydrophobic kernel can envelop hydrophobic antitumor medicine targeting cell nucleus to form medicine carrying grafting micelle. The present invention provides nanometer subcellular organelle administration for high efficiency low toxicity tumor treatment.

The invention relates an anticancer active part of fructus terminaliae billericae, and a preparation method of the anticancer active part. The invention comprises extraction of the part containing active components, study of a process for enriching by adopting macroporous absorption resin, identification of the active components in the active part, and use of the active part in in-vivo or in-vitroinhibition of liver cancer HepG2, lung cancer A549, lung adenocarcinoma NCI-H1703, gastric cancer BGC823, osteosarcoma cell MG-63, colorectal cancer HCT116, breast cancer MCF-7, neuroblastoma cells shsy5y, kidney cancer ACHN, normal liver cells L02, human breast ductal carcinoma cells ZR75-1, human colorectal adenocarcinoma cells Colo-205, human breast ductal carcinoma cells BT-474, human breastcancer cells T-47D, human cervical cancer cell line HeLa, liver cancer cells H22, and the like. The enrichment method applying the macroporous absorption resin to the anti-cancer active part of the fructus terminaliae billericae is simple in process, safe, non-toxic and low in production cost, and can be used for industrial production, thus having a great economic benefit and higher generalizationperformance.

The invention provides an ursolic acid derivative, which is N-[3beta-acetoxy-ursa-12- alkene-28-acyl]-aminoethylenediamine-folic acid. A natural product ursolic acid is structurally transformed to obtain N-[3beta-acetoxy-ursa-12- alkene-28-acyl]-aminoethylenediamine-folic acid (I), N-[3beta-acetoxy-ursa-12-alkene-28-acyl]-aminoethylenediamine (III) and N-[3beta-acetoxy-ursa-12- alkene-28-acyl]-aminoethylenediamine (IV). The in vitro cell proliferation inhibition test shows that the proliferation inhibition effect of the compounds I, III and IV on tested tumor cell lines HepG2, of BGC823, A-375, Hela and the like is superior to that of the ursolic acid, and the toxic effect of the compounds I, III and IV on human embryonic lung fibroblasts (HELF) is lower than that of the ursolic acid. The in vitro anti-tumor effect of the compound III is the best, and the compound I has certain targeting.

The invention discloses a method for preparing a cervical cancer resistant polypeptide from a tuna dark meat protein. The cervical cancer resistant polypeptide Gln-Tyr-Asp-Glu-Tyr-Trp is prepared by using tuna dark meat as a raw material and carrying out degreasing, enzymolysis with alkaline protease, ultrafiltration, gel filtration chromatography, cell membrane chromatography purification and reversed phase high performance liquid chromatography purification. The polypeptide has outstanding inhibiting effects on proliferation of cells for a human cervical cancer cell strain HeLa, has IC50 of 0.16mg / mL and can be used for preparing drugs for preventing and treating cervical cancers.