83 results about "Dendritic cell vaccine" patented technology

Disclosed is a vaccine that includes a dendritic cell loaded with a yeast vehicle and antigen. Also disclosed are methods of making the vaccine and using the vaccine to elicit cellular and humoral immune responses in a mammal. Additionally, a method to elicit an immune response by administration of a yeast vehicle and an antigen that is not complexed to the yeast vehicle is disclosed.

The invention belongs to the technical field of cellular immunology and specifically discloses a special-purpose kit for preparing human dendritic cell vaccines capable of largely secreting IL(Interleukin)-12. The kit consists of a monocyte separating-obtaining culture medium, a culture medium for promoting DC (Dendritic Cell) to induce and differentiate, an agent for promoting the DC to mature and a tumor antigen. The DC prepared by the special-purpose kit disclosed by the invention is mainly applied to treating cancer patients or preventing cancer high-risk population. The special-purpose kit disclosed by the invention has the advantage that the prepared DC can secrete a great deal of IL-12, so that T cells are promoted to differentiate towards Th1 type immune response direction; and meanwhile, the special-purpose kit has the advantages of being simple in preparation process, low in cost, easy for large-scale production, and the like.

The invention provides a preparation method and application of a new therapeutic vaccine for dendritic tumor cells. The therapeutic tumor vaccine is chemotherapeutic drug induced tumor antigen, wherein, the dendritic cells are loaded and activated. The chemotherapeutic medicament induced tumor antigen contains a plurality of immunostimulation molecules as well as tumor-associated and specific antigen, which can remarkably carry out chemotaxis and activation on immunocytes such as the dendritic cells, T-cells (thymus-dependent lymphocytes) and the like, stimulate the dendritic cells to be mature and express a plurality of cell factors and chemotactic factors, effectively induce immune response reaction with antigenic specificity and non-specificity and strengthen body immune function. The therapeutic vaccine provided by the invention can be used for preventing and treating tumors and has the characteristics of simple preparation process, low cost, strong specificity, obvious curative effect and the like.

The invention provides a preparation method of a large-scale culture dendritic cell vaccine. The preparation method comprises the following process steps of: performing in-vitro separation and purification on collected white blood cells in human peripheral blood by adopting a blood cell separation machine to obtain a large number of mononuclear cells, wherein the order of magnitude can be above 10<9>; using a human granulocyte-macrophage colony stimulating factor and interleukin 4 to induce the culture to obtain a large number of immature dendritic cells, wherein the order of magnitude can be above 10<8>; and loading a tumor specific antigen in the immature dendritic cells, and then obtaining the mature dendritic cell vaccine with an anti-tumor effect under the induction culture conditions of a tumor necrosis factor alpha and lipopolysaccharides. The invention further provides a multi-time and multi-treatment course clinical application of the dendritic cell vaccine obtained through the method.

Said invention provides tumor antigen mRNA sensitized dendritic cell tumor vaccine, preparation and use thereof, and medicinal composition of dendritic cell. Said tumor vaccine is specific mRNA modified dendritic cell vaccine which can stimulate body to produce specific immune response aiming at HER2 positive tumor, so it can be used in preventing and curing HER2 positive tumor such as breast cancer etc. said invention has high transfection efficiency, wide anti tumor gammarayspectrum and strong specificity.

The invention provides a preparation method of a breast cancer-specific epitope polypeptide-loaded dendritic cell vaccine, and the method comprises the following steps: loading dendritic cells with identified human leukocyte antigen A201 positive epitope polypeptide of human epidermal growth factor receptor 2, breast cancer drug resistance protein and IQ motif and Sec7 structural domain 1 protein which specifically express in breast cancer (namely polypeptide comprising the amino acid sequence shown in any of SEQ ID No.1-6) to prepare into the dendritic cell vaccine which can induce strong breast cancer-targeting cytotoxic T lymphocyte response. The invention also provides a kit comprising the breast cancer-specific epitope polypeptide-loaded dendritic cell vaccine.

The invention discloses a multi-epitope peptide-loaded DC (dendritic cell) therapeutic vaccine for HCV (hepatitis C viruses), relating to the technical field of virology and immunology. The multi-epitope peptide-loaded DC (dendritic cell) therapeutic vaccine is characterized in that two CTL epitopes (namely, a NS4B (1793-1801) SMMAFSAAL and a P7 (774-782) AAWYIKGRL) are used for constructing recombinant adenoviruses, then the recombinant adenoviruses are used for infecting human dendritic cells so as to prepare a multi-epitope DC vaccine. Detection results indicate that the multi-epitope peptide-loaded DC (dendritic cell) therapeutic vaccine for HCV (hepatitis C viruses) disclosed by the invention has an immunogenicity.

The invention discloses a dendrite-shaped cell vaccine for loading a recombination human heat shock protein 70 polypeptide composite, a method for preparing the same and application thereof. The preparation method comprises: preparing a dendrite-shaped cell by designing and synthesizing an antigen polypeptide, forming the composition by the antigen polypeptide and the recombination human heat shock protein 70(rhHSP70), and loading the composite on the dendritic cell (DC) to obtain the vaccine. The vaccine has the advantages of multi-target points, double adjuvants and high efficacy, and can be used for resisting tumors and treating infectious diseases. The preparation process is simple and fast, and low in cost.

The invention belongs to the technical field of cellular immunology, and particularly relates to a method for preparing a human dendritic cell vaccine. The method comprises the following steps: (1) separating a monocyte from peripheral blood mononuclear cells by an adherent method; (2) inducing the monocyte to differentiate into DC by using a DC culture medium, and adding a tumor antigen on the third day; (3) on the fifth day, adding a combined type DC maturity promoting agent of IL-1beta, IL-6, TNF-alpha, IFN-gamma and Mtb-HAg; and (4) on the sixth-seventh day, detecting the maturity degree of the DC and the secretion amount of IL-12. The prepared DC is mainly applied in treatment of cancer patients or prevention of high-risk cancer groups. The method has the advantages that the prepared DC can secrete a large amount of IL-12, thereby prompting T cells to differentiate in the direction of Th1-type immune response; and moreover, the method has the superiorities of simple preparation technology, low cost, easy large-scale production and the like.

The invention provides a preparation method of a tumor dendritic cell vaccine sensitized by glycosylated antigen MUC1 (mucoprotein 1). Glycosylation modified tumor antigen peptide is used for sensitizing externally cultured DC (Dendritic Cell) and then the activated DC cells are transfused to a tumor patient. The invention further provides an application of the tumor DC cell vaccine sensitized by the glycosylated MUC1 antigen in treatment of breast cancer and pancreatic cancer. The preparation method provided by the invention has the following advantages (1) the DC cell vaccine amplification efficiency is high; (2) the DC cells have high antigen activity; (3) the DC cells have high maturity degree, and side effects such as immune tolerance are prevented; and (4) small side effects are caused.

A vaccine containing AAH-loaded mature dendritic cells for treatment of AAH-expressing tumors in mammalian subjects. A method of producing primed dendritic cells is carried out by contacting isolated dendritic cells with an antigen such as AAH. Following the antigen-contacting step, the dendritic cells are contacted with a combination of cytokines such as GM-CSF and IFN-γ.

An immunotherapeutic strategy is disclosed that combines antigen-encoding DNA vaccine compositions combined with siRNA directed to pro-apoptotic genes, primarily Bak and Bax, the products of which are known to lead to apoptotic death. Gene gun delivery (particle bombardment) of siRNA specific for Bak and/or Bax to antigen-expressing DCs prolongs the lives of such DCs and lead to enhanced generation of antigen-specific CD8+ T cell-mediated immune responses in vivo. Similarly, antigen-loaded DC's transfected with siRNA targeting Bak and/or Bax serve as improved immunogens and tumor immunotherapeutic agents.

The invention provides a preparation method for a dendritic cell vaccine loaded by a tumor specific antigenic epitope polypeptide. The method comprises the following steps: adopting a human leucocyte antigen A201 positive epitope of an epithelial cell adhesion molecule identified by tumor specific expression, namely a polypeptide composed of amino acid sequences represented by any one of SEQ ID NO.1-6; loading dendritic cells by using the polypeptide of any one of the SEQ ID NO.1-6 to prepare the dendritic cell vaccine. The dendritic cell vaccine can be used for initiating a very strong target anti-tumor cytotoxic T lymphocyte effect. The invention further provides a kit for preparing the dendritic cell vaccine loaded by the tumor specific antigenic epitope polypeptide.

The invention relates to the fields of biotechnology and medicine, and provides a modified dendritic cell (DC); a dendritic cell is infected with MG-7Ag antigen mimic epitope tandem sequences loaded with a lentivirus vector, and a target antigen sequence is integrated into a dendritic cell genome. The invention provides a rapid culture scheme of the dendritic cell derived from a peripheral blood monocyte in vitro, and also provides a vaccine with an active ingredient of the modified dendritic cell. The vaccine is used for tumor prevention and active immunotherapy. The MG-7Ag antigen sequence-modified DC vaccine can obtain high-purity CTL cells and efficient target cell killing ability after DC-CTL co-culture, and the co-culture supernatant contains high-concentration IFN[gamma] secretion.After tumor attack, the tumorigenic volume of mice in a DC-CTL group is significantly smaller than that of mice in a control group, and the DC vaccine has great potential value in immunotherapy of MG-7Ag positive tumor.

The invention discloses an application of pleurotus ferulae polysaccharide (PFPS) in preparing a dendritic cell vaccine adjuvant. The PFPS has an effect of stimulating dendritic cell maturation so as to promote the immunoreaction of dendritic cell vaccines and improve the anti-tumor effect.

The invention relates to the technical field of biology, in particular to a method for preparing dendritic cell vaccine. The method is characterized by comprising the following preparation steps: (1) taking autologous blood of a patient, and separating red blood cells, mononuclear cells and plasma from separating medium of human lymphocyte; (2) adjusting concentration of the mononuclear cells; (3) adding the solution into a six-pore plate and performing adherence for 16 hours; (4) sucking and discharging non-adherent cells on the upper layer of each pore of the six-pore plate; (5) adding 3ml of dendritic cell (DC) culture medium, placing the solution in a carbon dioxide cultivating box with the concentration of carbon dioxide of 5% at the temperature of 37 DEG C to perform cultivation for 2-3 days; (6) performing half-quantity liquid changing; (7) enabling the concentration of the autologous tumor antigen in each pore of the six-pore plate to be 20 mu g/ml by loading the autologous tumor antigen in the sixth day; and (8) detecting the quantity and maturity of the matured DC cells after 24 hours. Compared with the prior art, the number of the matured DC cells at least reaches 1*107, and the maturity is larger than 85%.

The invention relates to a dendritic cell bacterin, in particular to a dendritic cell bacterin which can effectively promote the functional recovery of spinal cord injury and a manufacturing method thereof.

A human telomerase reverse-transcriptase (hTERT)/human interleukin 18 (hIL 18) fusion protein with composite function is prepared from 2 cell factors with similar or complementary functions through artificial reforming of their linking terminals and configuring. The expression of its carrier is created for increasing its target killing power to tumor cells and the dendritic cell mediated immune-effect. It can be used to prepare the dendritic cell vaccine for treating cancer.

The invention provides a preparation scheme of a novel HER2/neu gene-modified dendritic cell vaccine, which comprises: 1, constructing a lentivirus vector carrying the HER2/neu gene fragment; 2, preparing recombinant lentiviruses carrying the HER2/neu gene fragment by using the vector; and 3, infecting dendritic cells with the recombinant lentiviruses and obtaining the vaccine. Animal experiment proves the novel HER2/neu gene-modified dendritic cell vaccine can effectively prevent and treat HER2/neu positive tumors.

The invention discloses application of graphene oxide in preparing a dendritic cell function accelerant. The dendritic cell function is maturity and/or transfer ability of a dendritic cell. By joint incubation and simulative activation of graphene oxide with the immure dendritic cell originated from bone marrow in vitro, the expression level and Inflammatory response ability of costimulatory molecules and chemokine receptors of the dendritic cell are enhanced, so that the abilities of the dendritic cell in vivo migration and homing to lymphocyte are promoted. Compared with cell factor cocktail, graphene oxide has the advantages of low cost, stable structure, liability to obtain and relatively single composition, so that clinic conversion in preparation of a dendritic cell vaccine is further facilitated.