Abstract: The invention relates to extracorporeal methods of analyzing the presence or absence of mutations which cause familial hypercholesterolemia. The inventive methods describe the way in which said mutations can be detected using a DNA sample from an individual and comprising the following: chain reaction of the polymerase with primers which are complementary to the low-density lipoprotein receptor gene; analysis of the amplified product by sequencing; restriction analysis; single strand conformation polymorphism techniques; heteroduplex analysis and analysis of a device on top of a biochip glass support on which oligonucleotide probes are disposed, which can be used to detect the aforementioned mutations in the DNA.

Abstract: Method and device for the in vitro analysis of mRNA of genes involved in hematological neoplasias. The device, composed of probes which specifically hybridize with genes involved in hematological neoplasias, designed so that its behaviour in the hybridization is similar, permits the evaluation of the mRNA level in biological samples taken from subjects suspected to be suffering from hematological neoplasia and facilitating the comparison between the different samples and their grouping by similarity in the gene expression patterns, especially when the probes are disposed in the form of microarray. The application of the method of the invention to obtain and process data of gene expression differences from the device of the invention permits the identification of genes significant for distinguishing samples associated to hematological neoplasias, facilitates the diagnosis of neoplasias as CLL and permits making a prognosis of the evolution thereof.