338 results about "Tumor formation" patented technology

The present invention relates to the use of self-assembling peptide amphiphiles to prevent tumor formation by transplanted stem cells. The present invention further relates to the use of self-assembling peptide amphiphiles to treat cancers.

The present invention relates to the field of pathological angiogenesis and arteriogenesis. in particular, a stress induced phenotype in a transgenic mouse (PIGF-/-) that does not produce Placental Growth Factor (PIGF) and that demonstrates an impaired vascular endothelial growth factor (VEGF)-dependent response. PIGF-deficiency has a negative influence on diverse pathological processes of angiogenesis, arteriogenesis and vascular leakage comprising ischemic retinopathy, tumour formation, pulmonary hypertension, vascular leakage (oedema formation) and inflammatory disorders. Molecules that can inhibit the binding of PIGF to its receptor (VEGFR-1), such as monoclonal antibodies and tetrameric peptides. Further, the use of these molecules to treat the latter pathological processes.

The present invention relates to the engineering of recombinant influenza viruses that express tumor-associated antigens. Expression of tumor-associated antigens by these viruses can be achieved by engineering specific epitopes into influenza virus proteins, or by engineering viral genes that encode a viral protein and the specific antigen as independent polypeptides. Tumor-bearing patients can be immunized with the recombinant influenza viruses alone, or in combination with another treatment, to induce an immune response that leads to tumor reduction. The recombinant viruses can also be used to vaccinate high risk tumor-free patients to prevent tumor formation in vivo.

The invention is directed to a method of detecting a malignancy or a pre-malignant lesion in breast or other tissue, or a pathologic condition, by detecting the presence of single-chain or two-chain forms of matriptase in the tissue. The invention is further directed to a method of treating malignancies, which have the phenotype of matriptase production by administering a tumor formation inhibiting effective amount of concentrate of Bowman-Birk inhibitor (BBIC), or other matriptase inhibitor. The invention also is directed to nucleic acids encoding a matriptase protein or fragments thereof, and their use for structure elucidation and modeling to identify other inhibitors of matriptase, as well as to methods of identifying matriptase modulating agents, including activators and inhibitors.

The invention belongs to the technical field of tissue engineering and particularly relates to adipose tissue source exosome gel, a preparation method and application. The adipose tissue source exosome gel is characterized by comprising an adipose tissue exosome and a solvent in a mass-volume ratio of (1-3):1, wherein an aquogel is served as the solvent. The preparation method comprises the following steps: treating an adipose tissue, acquiring an adipose tissue extract, acquiring the adipose tissue source exosome and preparing the adipose tissue source exosome gel. The adipose tissue source exosome gel is mainly used for promoting the fat regeneration. The invention particularly relates to the exosome extracted from the adipose tissue. When the exosome is applied to the nude mouse body, a new mature adipose tissue can be generated. The defects of insufficient seed cell resource, potential malignant transformation and tumor formation of the traditional tissue engineering can be overcome; the exosome has the advantage of easiness in storage and transportation; a new thought is supplied for acquiring the fat for the tissue engineering.

The present invention is directed to novel compounds and pharmaceutical compositions that inhibit the binding of the SDF-1 chemokine to the chemokine receptor CXCR4 and/or the binding of the SDF-1 or I-TAC chemokines to the chemokine receptor CCXCKR2 (CXCR7). These compounds are useful in preventing tumor cell proliferation, tumor formation, metastasis, inflammatory diseases, treatment of HIV infectivity, treatment of stem cell differentiation and mobilization disorders, and ocular disorders.

The present invention relates generally to novel compounds relating to the diagnosis and treatment of pathologies relating to the Hedgehog pathway, including but not limited to tumor formation, cancer, neoplasia, and non-malignant hyperproliferative disorders. The present invention includes novel compounds, novel compositions, methods of their use and methods of their manufacture, where such compounds are generally pharmacologically useful as agents in therapies whose mechanism of action involve methods of inhibiting tumorigenesis, tumor growth and tumor survival using agents that inhibit the Hedgehog and Smo signaling pathway.

The invention discloses a fusion protein of melittin and human mutant interleukin-2, which is characterized in that, a linker peptide gene is used to link the encoding genes of human mutant IL-2 and melittin. The invention can be used to screen cloning capable of improving CD8+T cell mediated CTL reactivity of the body after the tumor formation, the fusion protein can be used fine genetic medicament for the treatment of tumors.

Novel Wortmannin analogs and their use in inhibiting inhibiting PI-3-kinase activity in mammals as well as tumor formation in a subject are described herein.

The invention provides a biological artificial trachea and a preparation method thereof in combination with a 3D printing technology. Materials adopted for the biological artificial trachea simultaneously have flexibility and a certain mechanical strength, so that physical and mechanical properties of the trachea serving as a hollow organ in the chest are met. The artificial trachea is porous and loosened in structure and favorable for nutrient diffusion and ingrowth of autologous vessels. In addition, seed cells obtained by expansion of airway epithelial cells and cartilage cells of a receptor are printed on the trachea wall, and patients' rejection reaction to cells is avoided. Besides, the seed cells are composed of mature cells in terminal differentiation, the induced differentiation problem and the tumor formation risk caused by the use of stem cells can be avoided. The spatial distribution of the cells is accurately controllable in printing, and the restorative process is accelerated according to the histology regular distribution. Finally, a trachea support can be degraded in vivo, complications caused by the fact that foreign matter remains in vivo are reduced, and the risk of taking out the foreign matter through a second operation is avoided.

The present invention is directed to the administration of an HSV derived oncolytic virus and a PI3K/AKT/mTOR pathway inhibitor to treat various types of resistant tumors. Therapy-resistant tumor formation is one of the main causes for treatment failure in the clinic. The treatment methods and compositions disclosed herein sensitize resistant tumors to the treatment of herpes simplex virus (HSV)-based oncolytic virotherapy. Pre or co-treatment of resistant tumor cells with the mTOR inhibitor, rapamycin, or certain PI3K inhibitors, such as LY294002, can efficiently sensitize the tumors to HSV derived oncolytic viruses, whereby the replication and spread of the viruses are dramatically enhanced.

Methods for treating, preventing or delaying onset of tumor formation and other forms of cancer are disclosed. The methods involve administration of a complement inhibitor to inhibit C5a receptor signaling in the tumor microenvironment.

The invention relates to the genetic engineering field, in particular to a human EpCAM targeted genetically engineered lymphocyte, a preparation method and use thereof. Technically, the invention aimsto provide a new effective means for immunotherapy of tumors. The technical scheme for solving the technical problem of the invention firstly provides a single-chain antibody capable of recognizing human EpCAM, a chimeric antigen receptor (CAR) containing the single-chain antibody, a vector carrying the chimeric antigen receptor, and a lymphocyte modified by the chimeric antigen receptor. After specific recognition of EpCAM overexpressed tumor cells, the EpCAM targeted chimeric antigen receptor modified lymphocyte provided by the invention can play an anti-tumor role through cytokine releaseand cytotoxicity, and can remarkably tumor formation, tumor growth and lung metastasis in vivo, thus having good application prospect.

The invention discloses a method for inducing a rat liver cancer model by injecting diethyl nitrosamine DEN in coordination with microcystin MC-LR into a rat body through intraperitoneal injection. Indexes such as liver weight to body weight ratio, liver appearance, liver histopathological slicing and GST-Pi (Glutathione S-transferase) protein expression level clearly show liver cell injury phase, liver cell hyperplasia-hepatocirrhosis phase and liver cell carcinomatous change process in a rat liver cancer occurring process, and find that the liver cancer model induced by the DEN in coordination with the microcystin MC-LR has a more obvious effect at the same time than that induced by DEN independently; the tumor formation time is shorter; and the model is an ideal model for researching occurrence of the liver cancer of a human body. The model has the characteristic of clearly showing each stage for occurrence of the liver cancer and contributing to research of a liver cancer occurrence process mechanism, detection of precancerous lesion and development of treatment medicaments.

The invention relates to a three-dimensional culture system based on thermo-sensitive biogel. The three-dimensional culture system is prepared by combining the following reagents: thermo-sensitive biogel, digestive fluid required for separating and culturing tumor cells, a basal culture medium and a human intestinal stem cell culture medium. The invention also provides a method for establishing acolorectal cancer patient-derived xenograft model through the three-dimensional culture system based on thermo-sensitive biogel. The three-dimensional culture system has the advantages that colorectalcancer cells can be further amplified and grown in the three-dimensional culture system based on thermo-sensitive biogel, and the tumor formation capability of the colorectal cancer cells in the immune deficient mice can be enhanced. Polyclonal tumor cells cultured in the system have high subcutaneous tumor formation capability in nude mice. The three-dimensional culture system has the advantagesof simple preparation method and mature technology, and is capable of greatly reducing the time and the cost for establishing the human-derived colorectal cancer xenograft model.

Development of a physiologically relevant 3D model system for cancer research and drug development represents quite a challenge. We have adopted a 3D culture system based on a transglutaminase-crosslinked gelatin gel (Col-Tgel) to mimic tumor 3D microenvironment. The system has several unique advantages over other alternatives which include cell-matrix interaction sites provided by collagen derived peptides, a 3D construct suitable for reproducing the solid tumor microenvironment including multicellular tumor spheroids and metabolic gradients. In addition the controllable gel stiffness provides a wide range of mechanical restrictions; and compatibility with imaging based screening due to its transparent properties. In addition the Col-Tgel provides a cure-in-situ delivery vehicle for tumor xenograft formation in animals with a high take rate. Overall, this unique 3D system could provide a platform to accurately mimic in vivo situations to study tumor formation and progression both in vitro and in vivo, as well as for screening antineoplastic drugs and assessing the occurrence of drug resistance related to cancer cell stress.

The present invention, in one aspect, relates to a method of and apparatus for examining a target for tumors or lesions using what is referred to as ''Early Increase in microvascular Blood Supply'' (EIBS) that exists in tissues that are close to, but are not themselves, the abnormal tissue and in tissues that precede the development of such lesions or tumors. While the abnormal tissue can be a lesion or tumor, the abnofmal tissue can also be tissue that precedes formation of a lesion or tumor, such as a precancerous adenoma, aberrant crypt foci, tissues that precede the development of dysplastic lesions that themselves do not yet exhibit dysplastic phenotype, and tissues in the vicinity of these lesions or pre-dysplastic tissues.

The flavonoid family of phytochemicals, particularly those derived from soy, has received attention regarding their hormonal activity and their effects on human health and disease. The types and amounts of these compounds in soy and other plants are controlled by both constitutive expression and stress-induced biosynthesis. The health benefits of soy may therefore be dependent upon the amounts of the various hormonally active phytochemicals present. We have identified increased biosynthesis of the isoflavonoid phytoalexin compounds, Glyceollins I, II and III, in soy plants grown under stressed conditions (elicited soy), which exhibit marked anti-estrogenic effects on ER function. Here we demonstrate that specific glyceollins, isolated from elicited soy, displayed anti-estrogenic activity, suppressing basal and estrogen stimulated colony formation of ER-positive estrogen dependent breast cancer cells and inhibiting ER-dependent gene expression of progesterone receptor (PgR) and stromal derived factor-1 (SDF1/CXCL12). Examining the effects of glyceollin on in vivo tumor formation/growth we demonstrate the ability of glyceollins to significantly suppress basal and estrogen-stimulated tumor growth of ER-positive MCF-7 breast and BG-1 ovarian carcinoma cells in ovariectomized female nude mice. We further demonstrate that the effects of glyceollins on suppression of tumor growth correlate with inhibition of estrogen stimulated PgR expression. In contrast to the uterotropic activity of tamoxifen the glyceollins displayed no uterine agonist activity. The Glyceollin (I-III) compounds may represent an important component of the health effects of soy as well as represent novel anti-estrogens useful in the prevention or treatment of breast and ovarian carcinoma.

The invention discloses application research of an in-vivo tumor engineering human oophoroma tumor model established on the basis of an injectable collagen aquogel composite human oophoroma cells in a noninvasive subcutaneous injection form to a nude mouse. The injectable collagen aquogel stent used as a substrate material is compounded with human oophoroma cell SKOV3 to noninvasively establish the in-vivo tumor engineering human oophoroma tumor model at the nude mouse subcutaneous tissues; and compared with the traditional human oophoroma tumor model established in an independent cell injection mode under the condition of no stent material, the detection on the tumor model indicates that the malignancy of the human oophoroma tumor established on the basis of the injectable collagen aquogel is higher, and is more approximate to that of the human oophoroma tumor, and the in-vivo tumor model established in such a mode has smaller trauma possibility. The tumor model established by the method has higher tumor formation rate (up to 95%), which is about 15% higher than the traditional mode, thereby providing a more reliable tumor model for further research.