Abstract:
This invention relates to the static or continuous magnetic separation of specific entities from mixtures where the separation of target entities is clone in a one-step process. It is universally applicable to the harvest or removal of such entities for processing of biological molecules, cells of all types, virus particles, and the like, and for small- to large-scale separations of the same. By manipulation of the scientific principles that underlie this invention, specific targets can be conveniently captured for analysis, harvested or subjected to further processing on a collection surface free of bystander components. The principles employed and the methods disclosed completely obviate the need for washing of targeted entities such as cycles of resuspension and magnetic separation for removal of contaminating substances in the case of static separation or complex cycles of sample introduction and harvest to perform continuous processing.
Abstract:
Methods and apparatus for separation of rare cells of interest from a biological sample are provided. The present methods and apparatus effectively reduce fragile rare cell exposure to manipulations that adversely impact cell integrity and collection.
Abstract:
An apparatus and methods are provided for the magnetic separation of target bioentities. The apparatus includes a fluid chamber and a magnetic clement for drawing target bioentities toward a collection surface of the fluid chamber. The apparatus may include a positioning assembly operable to variable change the position and orientation of the fluid chamber relative to the magnetic element.
Abstract:
Method consists of placing a flexible container within a rigid frame and expanding the container by pneumatic or hydraulic pressure such that the walls of the container conform to the inside walls of the rigid frame thus forming a well-defined chamber. The system has the capability of reducing the volume of the chamber by adjusting the distance between the walls of the rigid container. The methods and systems so described are applicable to closed sterile systems that employ immunomagnetic isolation or purging of components from blood products. By providing a fixed volume and at least one surface upon which targeted entities can be magnetically deposited, target cells in the case of positive isolations can be magnetically held, flushed with wash buffers over them to remove entrapped cells and finally the recovery of product of very high purifies and at high yields.
Abstract:
An apparatus and methods are provided for the magnetic separation of target bioentities. The apparatus includes a fluid chamber and a magnetic element for drawing target bioentities toward a collection surface of the fluid chamber. The apparatus may include a positioning assembly operable to variable change the position and orientation f the fluid chamber relative to the magnetic element.
Abstract:
An apparatus and methods are provided for the magnetic separation of target bioentities. The apparatus include a fluid chamber and a magnetic element for drawing target bioentities toward a collection surface of the fluid chamber. The apparatus may include a positioning assembly operable to variable change the position and orientation of the fluid chamber relative to the magnetic element.
Abstract:
Disclosed is a high gradient magnetic separation apparatus for recovering magnetic ally labeled target entities from viscous and/or complex test media. The target entities are captured on a ferromagnetic element in which a magnetic field gradient is induced by a magnetic field source. The apparatus is designed to perform various operations on captured target entities. Methods of using the apparatus are also disclosed, e.g., for isolation of circulating tumor cells.