This Standard Reference Material (SRM) is a frozen fish tissue homogenate that was prepared from fish collected from Lake Michigan, and is intended primarily for use in evaluating analytical methods for the determination of selected trace elements, methylmercury, total mercury, polychlorinated biphenyl (PCB) congeners, chlorinated pesticides, polybrominated diphenyl ether (PBDE) congeners, perf...

Pathologic diagnosis requires tissue fixation for histologic and immunohistologic analysis, and formalin is routinely used for this. The disadvantage of this fixative is its inability to preserve nucleic acids. Pathologic tumor diagnosis requires extensive molecular analyses, for which formalin fixation may be not adequate. Recently, an alcohol-based fixative (molecular fixative, MF) was descri...

There is a large amount of tissue stored in brain collections and brain banks, but little is known about whether formalin-fixed tissues and paraffin blocks stored for years in brain banks are suitable for the retrospective genetic studies. The study was carried out in order to: (i) compare DNA preservation in frozen, formalin-fixed and paraffin-embedded tissues stored for different periods; (ii...

Frozen section is a prominent point of intersection between surgeons and pathologists. It is regarded as the most definitive--but not the sole--form of intraoperative consultation. Its role in tissue triage, diagnosis, and intraoperative management should not be misconstrued as a shortcut to a definitive diagnosis. Although the pathologist remains in control of the tissue disposition, frozen se...

OBJECTIVE The purpose of this study was to histologically analyze allografts from cadaveric semitendinous muscle after cryopreservation at -80 degrees C in comparison to a control group kept at only -4 degrees C to test the hypothesis that the histological characteristics of the tissue are maintained when the tendons are kept at lower temperatures. METHODS In a tissue bank, 10 semitendinous t...

OBJECTIVES To translocation (externalization) of phosphatidylserine lead at least the five negative effects observed during cells cryopreservation: hypoxia, increasing of intracellular Ca2+, osmotic disruption of cellular membranes, generation of reactive oxygen species (ROS) and lipid peroxidation. The aim of this study was to test the intensiveness of the phosphatidylserine translocation imme...

PURPOSE The Cooperative Prostate Cancer Tissue Resource (CPCTR) is a National Cancer Institute-supported tissue bank that provides large numbers of clinically annotated prostate cancer specimens to investigators. This communication describes the CPCTR to investigators interested in obtaining prostate cancer tissue samples. EXPERIMENTAL DESIGN The CPCTR, through its four participating institut...

References [1] West MJ. New stereological methods for counting neurons. Analysis of cell death in the trochlear nucleus of the chick embryo: calibration of the optical dissector counting method reveals systematic bias. Differential tissue shrinkage and compression in the z-axis: implications for optical dissector counting in vibratome, plastic and cryosections. Use of cryostat sections from sna...