摘要:
The present invention provides highly advantageous and efficient methods for spermatogonial stem cell (SSC) transfer for the generation of animals having valuable traits or genetic background.
摘要:
Compositions suitable for use as adjuvants in the preparation of vaccines, particularly those vaccines useful in the treatment of cancer, are provided. Methods for inhibiting tumor growth in an animal are also disclosed. Methods for immunizing an animal against cancer, such as prostate cancer, are also described. The adjuvants described are comprised of an extracellular matrix material, such as small intestinal submucosal (SIS) tissue. The preparations may take the form of sheets, gels, liquids (injectable), trocar, or other solid or semi-solid preparation. The invention provides for enhanced tumor inhibition of 2-fold or greater, compared to vaccine preparations without the extracellular matrix material, or from 4- to 5-fold, compared to preparations without the adjuvant promoting extracellular materials.
摘要:
Provided are methods for preparing gelled, solubilized extracellular matrix (ECM) compositions useful as cell growth scaffolds. Also provided are compositions prepared according to the methods as well as uses for the compositions. In one embodiment a device, such as a prosthesis, is provided which comprises an inorganic matrix into which the gelled, solubilized ECM is dispersed to facilitate in-growth of cells into the ECM and thus adaptation and/or attachment of the device to a patient.
摘要:
Improved insemination systems particularly adapted to use for sex-selected sperm sorting include systems which achieve superovulation and then multiple embryo production with sexed embryos. These systems combine with other techniques, including techniques for enhanced sheath fluid and other strategies which minimize stress on the sperm cells, and, potentially, a 2.9 percent sodium citrate sheath solution for bovine species and a hepes bovine gamete media for equine species. Improved collection systems and techniques for the process are described so that commercial application of sperms samples as well as the resulting animals may be achieved.
摘要:
A method for preserving spermatozoa (sperm) by air-drying. A semen sample is received and the sperm are separated from contaminants in the semen sample. The sperm may be separated from the semen sample by layering the semen sample onto a two-layer discontinuous percoll layer followed by centrifugation or by centrifuging the semen sample. The sperm concentrate is spread onto a sterile plate and allowed to air dry. The air-dried sperm may be stored at 0° C. to 8° C. The air-dried sperm may be recovered by adding a warm physiological solution to the air-dried sperm. The recovered sperm may be used for in vitro fertilisation or for intracystoplasmic sperm injection (ICSI).
摘要:
Sperm, oocyte, and embryo survival and function is improved in vivo or in vitro by the use of a polysaccharide containing arabinose, galactose and/or hexuronic acid. In particular, a nonspermicidal lubricant containing such a polysaccharide (e.g., gum arabic, pectin, or galacturonic acid) increases the fertilization potential of the sperm during coitus, artificial insemination or sperm collection. Similarly, a freezing medium containing a polysaccharide containing arabinose, galactose and/or hexuronic acid enhances sperm, oocyte, or embryo viability.
摘要:
The means and methods of inactivating viruses and other organisms in cell-containing or biopolymer-containing compositions comprising contacting such compositions with selective ethyleneimine oligomer inactivating agents are disclosed. The means and methods of this invention selectively modify functional nucleic acids in a cell-containing or biopolymer-containing composition using selective ethyleneimine oligomer inactivating agents, such as the trimer or tetramer without significant alteration of proteins or other biopolymers.
摘要:
A mathematical model, and membranes and devices based upon that model, to optimize protocols for the addition or removal of cryoprotectant to or from biological cells. This disclosure describes the use of four equations to predict optimal protocols to add or remove cryoprotectant to or from biological cells. The equations particularly require experimentally found data, specific to cell-type and species, regarding the osmotic tolerance of the cells, where osmotic tolerance refers to the cells ability to shrink or swell to various changes in osmolality without injury. The equations further require the cryoprotectant permeability coefficient and the water permeability coefficient of the particular cells' plasma membrane. These coefficients are found with experimental data of the knetic volume change of the cell-type to a known concentration and temperature of cryoprotectant. Also disclosed are particularly preferred methods and devices to add or remove cryoprotectant to or from these cells based upon these equations.
摘要:
A method for Avian sex-preselection by identifying sex-specific proteins for maternal immunization to embryonic proteins is described. Sex-preselection proteins are used in sexing offsprings.
摘要:
A substantially purified intra-acrosomal primate sperm antigen useful in a contraceptive vaccine is disclosed herein. The antigen remains associated with primate sperm after the acrosome reaction. In particular, it remains associated with the inner and outer acrosomal membranes. Modified antigens and fragments thereof prepared by protein modification techniques are also disclosed as well as methods for purifying and using the antigens. Also disclosed are monoclonal and polyclonal antibodies to the antigen and methods of making and using such antibodies. Methods of use include purification of the antigen or use in various diagnostic techniques. Also disclosed are cDNA, expression vectors, and transformed microorganisms that produce the antigen.