High endogenous avidin binding activity: an inexpensive and readily available marker for the differential diagnosis of kidney neoplasms.

It has been documented that some tissues, such as salivary gland, liver, cardiac and skeletal muscles and kidney, have high level endogenous biotin or endogenous avidin binding activity (EABA). Limited data is available on EABA in renal cell neoplasms. A tissue microarray (TMA) was constructed that included oncocytoma (n=30), chromophobe renal cell carcinoma (RCC) (n=18), clear cell RCC (n=45), clear cell RCC with granular/eosinophilic (G/E) features (n=19), papillary RCC (n=21), papillary RCC with G/E features (n=29) and benign renal tissues (n=31).

Alterations in the p16/pRb cell cycle checkpoint occur commonly in primary and metastatic human prostate cancer.

We examined the status of a cell cycle checkpoint by immunohistochemically staining for p16 and pRb using multiple tissue arrays generated from 49 primary and 23 hormone-sensitive metastatic human prostate cancers. We find that p16, a cell cycle inhibitor, is paradoxically overexpressed in 83% of proliferating primary prostate cancers and increased expression correlates with a more rapid treatment failure (P=0.01) and a higher histologic grade (P=0.

Tissue examination to monitor antiangiogenic therapy: a phase I clinical trial with endostatin.

Purpose: The purpose of this study was to determine the effect of the angiogenesis inhibitor endostatin on blood vessels in tumors and wound sites.

Experimental Design: In a Phase I dose escalation study, cancer patients were treated with daily infusions of human recombinant endostatin. Tumor biopsies were obtained prior to and 8 weeks after initiation of treatment.

Blood flow distribution in necrotic versus nonnecrotic rabbit hearts.

The spatial myocardial blood flow heterogeneity of the normal heart was previously investigated by means of the standard microsphere-defined regional myocardial blood flow in nonischemic hearts. We determined the probability density functions of coronary blood flows in the rabbit heart at selected macroautoradiographic 20-microns cross-sections of the left ventricle in nonischemic as well as infarcted hearts. Macroautoradiography gave us spatial resolutions of 0.

Imaging of acute myocardial infarction and reperfusion.

During the last 20 years there has been a large amount of investigation designed to determine what is the best way of imaging acute myocardial infarction (AMI) using radiopharmaceuticals. 99mTc pyrophosphate is ideal for cases where the clinical diagnosis cannot be made but it is insensitive to detect subendocardial AMI and is taken up by reversibly-injured myocytes. Antimyosin antibody imaging is specific for AMI but it is flow-dependent at low myocardial flows and it distributes in a nonuniform way in reperfused infarcts requiring high nuclear imaging (SPECT or PET) spatial resolution for proper measurement.