Abstract:
The present invention provides methods for identifying human developmental genes. The invention also provides methods of obtaining mammals having a promoterless reporter gene expressed from a gene which is homologous to a human developmental gene. Fragments of several embryonic stem cell transcripts which show developmental or tissue specific regulation are also disclosed.
Abstract:
The present invention relates to a method for detecting activated ras protein. The method includes immobilizing a protein on a solid support, incubating the immobilized protein with lysates from cultured cells, where the lysates include activated ras protein, and determining the amount of activated ras protein bound to the immobilized protein. The present invention also relates to a method of detecting ras oncogenic related malignancy in a human subject.
Abstract:
The device and methods herein disclosed were developed to allow a large number of small samples of organic tissue to be processed. The goal was to allow for the capture of these intracellular contents for study, use, and/or amplification. Though the device and specific protocols can be used to retrieve a variety of intracellular molecules one of the preferred embodiments particularly lends itself to the extraction of DNA. The electromagnetic device uses a set of terraced coils controlled in such a manner as to continually alternate polarity and thereby emulate the random motion of a manual mortar and pestle. This simulation of random motion is created through the arrangement of coils found in this invention. Methods were also developed to aid in the retrieval of DNA or other intracellular components using this device such that these components can be isolated and then used for study, amplification, or a variety of different purposes. Essentially the enclosed invention discloses a device and methodology which will allow for the rapid processing of many small tissue samples. This will assist in making such procedures as genotyping, genetic analysis, and gene mapping faster and more reliable on a large scale.
Abstract:
The invention provides a cell line comprising Kaposi's sarcoma-associated herpesvirus (KSHV). Preferably, the cell line is a body cavity-based lymphoma cell line, and more preferably, the cell line does not harbor Epstein-Barr virus. Two cell lines designated BC-2 and BC-3 are thus provided. These cell lines can be used in a method of propagating KSHV. The method comprises culturing the cell line, wherein the KSHV within the cell line thereby propagates. The BC-3 cell line, in particular, can be used in a method of propagating KSHV in the absence of Epstein-Barr virus. The method comprises culturing the cell line designated BC-3, wherein the KSHV within the cell line thereby propagates. Further provided is a purified viral suspension of KSHV, as well as a composition comprising purified KSHV and a suitable carrier.
Abstract:
The invention concerns mammalian recombinase genes (REC2) and their promoters. Over expression of REC2 in a cell is found to facilitate homologous recombination, particularly homologous recombination using a DNA/RNA chimeric oligonucleotide and to sensitize a cell to the apoptotic effects of irradiation. The REC2 promoter, in combination with a strong enhancer, e.g., a SV40 enhancer, was found to be a strong promoter following irridiation of the cells. A radiation induceable promoter can be used to sensitize a cell to radiation treatment by operably linking the radiation induceable promoter to a gene whose expression converts a prodrug to a drug such as a herpes thymidine kinase gene.
Abstract:
An ultra-low flow rate electrospray ionization (ESI) source provides flow rates in the range of 1.0 nL/min or less. The source is comprised of a needle (12) which is fabricated by laser-heated pulling of fused-silica tubing, followed by chemical etching and surface metallization. The pulling results in formation of a slowly tapering capillary (40) within the needle (12) which tapers to a tip (22) having a very small inner diameter. The etching process sharpens the outer wall (42) of the needle (12) to a very sharp tip, and the combination of these parameters results in the ultra-low flow rate capability. After a metal electrical contact (44) is formed on the exterior wall of the needle (12), an electrically insulating overcoating (46) is preferably deposited thereon which locks the contact (44) in place, thereby greatly increasing needle life, and also restricting the electrical contact point to the very tip of the needle (12). Although the use of the ultra-low flow rate ESI sources increases sensitivity to sampling errors, a mechanism is also provided to minimize one primary source of such errors, evaporation induced hydrodynamic flow, in capillary electrophoresis (CE). An injection system (60) is provided which enables a retractable droplet of buffer solvent to be positioned in contact with the tip end of the ESI needle during sample loading. This prevents evaporation from the tip end, thereby eliminating hydrodynamic flow into the distal end (63) of the capillary column (62) used in the CE process.
Abstract:
Ligase detection reaction is utilized to distinguish minority template in the presence of an excess of normal template with a thermostable ligase. This process can be carried out with a mutant ligase, thermostable ligase, or a modified oligonucleotide probe. This procedure is particularly useful for the detection of cancer-associated mutations. It has the advantage of providing a quantitative measure of the amount or ratio of minority template.
Abstract:
A method of diagnosing a condition or disease associated with MICROBIAL infections, congenital or acquired immunodeficiencies, inflammatory, auto-immune, allergic, or dermatologic diseases, sarcoidosis, immunoscenesence, sepsis, necrosis, malignancies, or vaccine administration, comprises obtaining a sample comprising T or B cells from a subject suspected of being afflicted with the condition selected from the group consisting of conditions associated with infections by congenital or acquired immunodeficiencies, inflammatory, auto-immune, allergic, or dermatologic diseases, sarcoidosis, immunoscenesence, sepsis, necrosis, malignancies, or vaccine administration.
Abstract:
Disorders mediated by vascular smooth muscle proliferation are treated by administering a vascular smooth muscle antiproliferative effective amount of an I2 imidazoline receptor agonist. The disorders include atherosclerosis, risk of blockage of artery after coronary angioplasty or blood vessel injury from non-angioplasty cause, and proliferative diabetic retinopathy. I2 imidazoline receptor agonists include idazoxan, UK 14,304, naphazoline, cirazoline and agmatine.
Abstract:
A laser scanning micrsocope (10) produces molecular excitation in a target material (14) by simultaneous absorption of three or more photons to thereby provide intrinsic three-dimensional resolution. Fluorophores having single photon absorption in the short (ultraviolet or visible) wavelength range are excited by a beam (16) of strongly focused subpicosecond pulses of laser light of relatively long (red or infrared) wavelength range. The fluorophores absorb at about one third, one fourth or even smaller fraction of the laser wavelength to produce fluoroscent images of living cells and other microscopic objects. The fluoroscent emission from the fluorophores increases cubicly, quarticly or even higher power law with the excitation intensity so that by focusing the laser light, fluorescence as well as photobleaching are confined to the vicinity of the focal plane. This feature provides depth of field resolution comparable to that produced by confocal laser scanning microscopes, and in addition reduces photobleaching and phototoxicity.