38 results about "Langerhan cell" patented technology

An object of the invention is to provide a method for delivery of macromolecules into biological cells, such as Langerhans cells (22) in the epidermis (20) of a patient, which includes the steps of coating electodes (16) in an electrode assembly (12) with solid phase macromolecules to be delivered, such as a DNA, and/or RNA vaccine or a protein-based vaccine, attaching the electrode assembly (12) having the coated electrodes (16) to an electrode assembly holder (13), providing a waveform generator (15), establishing electrically conductive pathways between the electrodes (16), and the waveform generator (15), locating the electrodes (16) such that the biological cells are situated therebetween, such as by penetrating the needle electrode (16) into the epidermis (20) above the epidermal basal lamina, and providing pulse waveform from the waveform generator (15) to the electrodes (16), such that macromolecule on the electrodes (16) is driven off of the electrodes (16), and delivered into the biological cells, such as the Langerhans cells (22).

A transcutaneous immunization system delivers antigen to immune cells without perforation of the skin, and induces an immune response in an animal or human. The system uses an adjuvant, preferably an ADP-ribosylating exotoxin, to induce an antigen-specific immune response (e.g., humoral and/or cellular effectors) after transcutaneous application of a formulation containing antigen and adjuvant to intact skin of the animal or human. The efficiency of immunization may be enhanced by adding hydrating agents (e.g., liposomes), penetration enhancers, or occlusive dressings to the transcutaneous delivery system. This system may allow activation of Langerhans cells in the skin, migration of the Langerhans cells to lymph nodes, and antigen presentation.

A method for entrapping migratory antigen presenting cells (APCs) and particularly Langerhans cells (LCs,) in vivo is provided. The method entails creating an artificial gradient of APC-attracting chemotactic factor in the homing path of APCs in vivo. Also provided is a composition for entrapping APCs and particularly, migratory LCs. In addition, a method for loading APCs in situ with antigen is provided. The method comprises entrapping APCs in vivo and subsequently loading the APCs in situ with antigen. Correspondingly, a composition for loading APCs in situ is also provided. Further provided is a method for stimulating the migration of entrapped APCs to draining lymph nodes. The ability to stimulate the migration of entrapped APCs to draining lymph nodes is useful, inter alia, for regulating an immune response in a subject. In addition, an in situ APC-based vaccine is provided which does not require any time-consuming, costly ex vivo manipulations.

The invention relates to a preparation method of small molecular weight dendrobium candidum polysaccharides. The preparation method comprises following steps: A, bacterial strain activation and expanding culture are carried out, wherein under aseptic conditions, an appropriate amount of a liquid culture medium is used for preparing a fusarium avenaceum bacterium suspension; B, high pressure homogenization is repeated for 5 to 10 times using a high pressure micro jet homogenizer so as to obtain a dendrobium candidum wall-broken homogenate; C, fermentation culturing is carried out, wherein an appropriate amount of a liquid culture medium is injected into a fermentation tank, the dendrobium candidum wall-broken homogenate and the fusarium avenaceum bacterium suspension are weighed, and are delivered into the fermentation tank for fermentation so as to obtain a fermentation liquid; and D, polysaccharide purification is carried out, wherein after fermentation, active carbon is used for decolouring, an obtained product is allowed to stand for 1h for absorption, filtering is carried out so as to remove residue and obtain a filtrate, vacuum pumping filtration is carried out so as to obtain a precipitate, the precipitate is washed with ethanol for three times, and vacuum drying is carried out so as to obtain the small molecular weight dendrobium candidum polysaccharides. The average molecular weight of the small molecular weight dendrobium candidum polysaccharides is lower than 300kDa; and the small molecular weight dendrobium candidum polysaccharides are capable of promoting propagation of skin probiotics, increasing the density of langerhans cells on skin, and improving skin immunity.

The invention relates to the use of CD14⁺ monocytes for the production of dendritic cells.

The invention comprises the use of CD14⁺ monocytes isolated from peripheral circulating blood for obtaining, by differentiation, at least one mixed population of Langerhans cells and interstitial dendritic cells, both Langerhans cells and interstitial dendritic cells being preconditioned and undifferentiated, and/or differentiated and immature, and/or mature, and/or interdigitated. The invention comprises their use in suspension, monolayer and three-dimensional cell and tissue models. The invention comprises the use of these cells and of these models as study models for the assessment of immunotoxicity/immunotolerance, for the development of cosmetic and pharmaceutical active principles and for the development and implementation of methods of cell and tissue therapy.

A method for efficient generation of neutrophils, eosinophils, macrophages, osteoclasts, dendritic cells an Langerhans cells from human embryonic stem cells is disclosed.

The invention relates to a composition for balancing skin micro-ecology as well as a preparation method and application thereof. The composition for balancing the skin micro-ecology comprises a saccharomycetes ferment filtrate, a bifida ferment lysate, a lactobacillus ferment, trehalose and a saccharide isomeride. According to the composition disclosed by the invention, all the components are matched with one another and have a synergistic effect, so that the composition for balancing the skin micro-ecology can preserve moisture, improve the skin barrier function, promote the proliferation ofskin beneficial bacteria, inhibit harmful bacteria, repair Langerhans cells damaged by ultraviolet rays and enhance the ultraviolet immune function of the skin. A sunscreen lotion containing the composition for balancing the skin micro-ecology can effectively preserve moisture and repair ultraviolet injury, can reduce inflammatory spots, improve skin flaws and enhance skin gloss, and has a wide development prospect in the field of cosmetics.

Influenza viruses have traditionally been administered by intramuscular injection. The invention is based on the idea of using alternative routes of delivery for influenza vaccines, more specifically routes that do not require as large a dose of antigen. Delivery of influenza antigen to the Langerhans cells is the route of choice according to the invention. This route has been found to be particularly useful for vaccinating patients who are naive to influenza virus (i.e. have not previously mounted an immune response to an influenza virus), which means that it is advantageous for immunising young children.

There is provided a method of activating a Langerhans cell (LC) exposed to a human papillomavirus (HPV) to induce a HPV-specific immune response, by administering to a subject an effective amount of a toll-like receptor (TLR) agonist, thereby activating the LC exposed to the HPV to induce the HPV-specific immune response.

Ecto-NTPDase function on Langerhans cells is demonstrated to counteract the nucleotide inflammatory response caused by certain types of chemical irritants. The present invention takes advantage of this observation by, first, providing methods for screening of chemicals for irritant potential based on their ability to induce nucleotide release from keratinocytes. Second, methods are provided for the prevention and treatment of inflammation using NTPDase protein or gene therapy. And third, there also are provided methods for screening candidate compounds for NTPDase modulatory activity, thereby identifying possible pro- and anti-inflammatory agents. Additionally, the role of NTPDases and P2 receptors in hyperactive immune conditions such as autoimmune diseases and allergic reactions such as allergic contact dermatitis has been demonstrated. Therefore, the invention also provides methods for the prevention and treatment of hyperactive immune conditions by using NTPDase inhibitors and/or P2 receptor inhibitors. Further provided are methods for screening candidate compounds for modulatory activity of NTPDase-mediated immune conditions, thereby identifying other possible immunotherapeutic agents.

This invention discloses one diabetes disease self antigen print agent case, whose islets of Langerhans cell extracts mixture protein composed of Langerhas element, glutamic acid decarboxylase and Langerhas cell; using protein print technique through SDS-polyacrylamide gel electrophoresis ranked by molecule size then into print film; its film bar comprises molecule of each Langerhans self antigen element to be put into reaction tank and serum; if it has antigen, then processing antigen combination and then adding enzyme cross and development agent in the zone; comparing with standard to judge whether serum has the antigen etc.

A one-step method for producing antigen loaded antigen-presenting cells from monocytes ex vivo has been found which comprises contacting the monocytes with a composition comprising an activator such as TNF alpha preferably in combination with at least one growth factor such as GM-CSF and at least one soluble or particulate antigen. According to the methods of the present invention, antigen-loaded dendritic cell vaccines can be generated within as little as three (3) days. In another method of the present invention, antigen loaded antigen-presenting cells are produced from monocytes ex vivo by contacting the monocytes with TNF alpha and granulocyte-macrophage colony stimulating factor at one time point to form antigen-presenting cells and then contacting antigen-presenting cells with soluble or particulate antigenic material antigen-presenting cells, wherein the antigen loaded antigen-presenting cells are produced in less than four days. The present invention also includes a vaccine which comprises monocyte-derived antigen loaded antigen-presenting cells, wherein the antigenpresenting cells are composed of two or more subsets selected from the group consisting of Langerhans cells with surface markers (CD 1 a+CD207+); interstitial dendritic cells with surface markers (CD 1a+CD207−); double negative dendritic cells with surface markers 20 (CD 1 a−CD 14−); and dendritic cells with surface markers (CD 14+CD 1 a−CD209+).

This invention provides an agent capable of destruction of CD52⁺ cells, including CD52⁺ dendritic cells, without affecting CD52 negative dendritic cells. CD52 negative dendritic cells include hut are not limited to Langerhans cells (LCs) or dermal-interstitial dendritic cells (DDC-IDCs). This invention also provides an agent capable or selective elimination of CD52⁺ dendritic cells. This invention further provides an agent capable of protection of CD52 negative dendritic cells as well as a composition comprising the above described agent, a pharmaceutical composition comprising an effective amount of the above agent, and a pharmaceutically acceptable carrier. Finally, this invention provides various uses of the above agent and the above compositions.

The present invention belongs to the field of medicine evaluating and detecting technology, and is especially process of constructing mouse skin Langerhans cell deletion model. Langerhans cell takes an important role in skin immune system. The mouse skin Langerhans cell deletion model constructing process includes adopting clobetasol propionate ointment as the model forming medicine and smearing it homogeneously onto the breast and abdominal skin of unhaired mouse. The histochemical staining and immunohistochemical experiments show that the said mouse model can well simulate the skin Langerhans cell deletion status, and may be used in screening skin immune medicine and in researching skin immune system inhibiting mechanism and medicine action mechanism. The present invention has simple process, short period, high repeatability, low cost and other advantages.

The invention discloses a method for regulating and controlling body immunoreaction through the regulation of skin DCs (dendritic cells)/ LCs (Epidermal Langerhans cells) by an electric signal to be presented to a T cell. The method comprises the following steps of: cells or skin tissues are put between an electrode A and an electrode B; a direct current power supply is connected between the electrode A and the electrode B; an electric field is formed between the electrode A and the electrode B; current enough to guide and control DCs/ LCs cell migration and localization is given; and therefore, the skin DCs/ LCs can be regulated through the electric signal to be presented to the T cell to regulate and control the body immunoreaction. The method disclosed by the invention has potential tobe used for preparing a novel vaccine adjuvant, or the method disclosed by the invention and other adjuvants are jointly used for regulating immunoreaction. The method can be used for targeting specific immunomodulators and accurate cancer treatment under a situation that the method is not induced and distributed by a chemical tendency, and common clinical side effects are reduced. Compared with existing common immunomodulators, the method disclosed by the invention has the advantages of a wide adjustable range and low cost, and is favorable for lightening the economic burdens of patients andthe society, and an operation condition of the method can be easily optimized.

The invention discloses a multi-effect youth-retaining gel containing fermentation filtrate of Ganoderma lucidum and a preparation method thereof, belonging to the facial care field, comprising the following raw materials in parts by weight: Ganoderma fermentation filtrate 0.1-1 part, polyol 1-10 parts, moisturizer 1-10 parts, thickener 0.2-2 parts, PH value regulator 0.2-2 part, antiallergic relaxant 0.2-3 parts, skin conditioner 0.3-3 part, whitening agent 0.5-5 part, preservative 0.1-1 part, essence 0.05-0.1 part, essence solubilizer 0.1-0.4 part, and 100 parts of deionized water. A Langerhans cell in human skin is activated by adde active ingredients of natural green Ganoderma lucidum and yeast extract into the multi-effect youth-retaining gel containing Ganoderma lucidum fermentationfiltrate, and the Langerhans cell in human skin is immunologically cascaded to enhance immunity and repair functions.

Novel genes expressed selectively by long-term dendritic cell (DC) lines (XS series) from murine epidermis which retain important features of resident epidermal Langerhans cells (LC) are provided. These genes encode distinct type II membrane-integrated polypeptides, each consisting of a cytoplasmic domain, a transmembrane domain, an extracellular connecting domain, and a C-terminal extracellular domain that exhibits significant homology to the carbohydrate recognition domains (CRD) of C-type lectins. Expression of both genes is highly restricted to cells of DC lineage (including epidermal LC). Thus, these genes encode new, DC-specific members of the C-type lectin family, now termed “DC-associated C-type lectin-1 and -2” (dectin-1 and dectin-2). Two isoforms of the dectin-1 molecule and five isoforms of the dectin-2 molecule have also been identified. The invention further provides His-tagged fusion proteins comprising 6× histidine and the extracellular domain of dectin-1 or dectin-2. Also provided are antibodies raised to synthetic peptides designed from the dectin-1 sequence or to the His-tagged fusion proteins described.

An in vitro culture method for inducing human umbilical cord blood cells CD34+ to differentiate into Langerhans cell includes culturing human umbilical cord blood cells CD34+ in a medium containing GM-CSF (granulocyte-macrophage colony stimulating factor), TNF-alpha (tumor necrosis factor-alpha), SCF (stem cell factor) and Flt3L (FMS-like tyrosine kinase 3 ligand), and differentiating the human umbilical cord blood cells CD34+ into Langerhans cells. The Langerhans cells generated are highly pure and high in yield, and have the functions of recognizing, absorbing and processing antigens and the function of activating immune response.

The invention relates to the use of a method in which by reducing in the blood of a mammal by administration of effectors the enzyme activity of dipeptidyl peptidase (DP IV) or enzyme activity similar to DP IV, the endogenous (or additionally exogenously administered) insulinotropic peptide gastric inhibitory polypeptide 1-42 (GIP1-42) and glucagon-like peptide amide-1 7-36 (GLP-17-36) (or similarly GLP-17-37 or analogues thereof) are decomposed in a causal sequence to a reduced extent by DP IV enzymes or those similar to DP IV. Consequently, the fall in the concentration of said peptide hormones or the analogues thereof is reduced or retarded. The increased stability, achieved by the action of DP IV effectors, of the incretine or the analogues thereof which are available endogenously or exogenously and consequently provided in increased numbers for insulinotropic stimulation of the incretine receptors of the Langerhans cells in the pancreas, changes the power of endogenous insulin thereby stimulating the metabolism of carbohydrates in the treated organism. The blood sugar level therefore drops below the glucose concentration, characteristic of hyperglycaemia, in the serum of the treated organism.

The invention relates to traditional Chinese medicine compositions, and particularly discloses a traditional Chinese medicine composition for treating human papilloma virus (HPV) infection and a preparing method and application thereof. Effective components of the traditional Chinese medicine composition are derived from sinopodophyllum hexandrum, cortex magnoliae officinalis, rhizoma polygoni cuspidati, air-plant herb, liquorice root, fructus kochiae, fructus bruceae, rhizoma smilacis glabrae and herba centellae. The traditional Chinese medicine composition is combined with the clinical treatment effect and condyloma acuminate animal model tests to constantly adjust the use quantities of all active pharmaceutical ingredients in the formula, and full play is given to the compatibility andsynthesis effects of all the active pharmaceutical ingredients in the traditional Chinese medicine prescription. The traditional Chinese medicine composition can effectively remove the human papillomavirus, has a significant treatment effect on HPV low-risk infection and HR-HPV positive cervical intraepithelial neoplasia low-grade lesions, and can increase the number of langerhans cells, and thusthe immunity of the body is enhanced.