ABSTRACT
Nephrogenic adenoma a rare bladder, ureter, or urethral lesion, is of disputed pathogenesis, metaplastic and congenital etiologies both being implicated in its development. Since light and electron microscopy have been unable to fully resolve the lesion's pathogenesis, the authors used biotinylated lectins as probes and avidin-biotin peroxidase complex (ABC) as a visualant to study cases of nephrogenic adenomas and compared their lectin binding patterns with those of normal transitional epithelium, human embryonic kidneys, and cases of cystitis cystica and glandularis and squamous metaplasia of the bladder in an effort to clarify this issue. Only the epithelial lining of the luminal surface and tubuli in nephrogenic adenoma and tubules in embryonic kidney exhibited free PNA receptor sites. The striking staining similarities between the epithelial components of nephrogenic adenomas and mesonephric and metanephric tubules complement previous findings concerning the origin of nephrogenic adenoma.
Subject(s)
Adenoma/metabolism , Kidney Tubules/embryology , Receptors, Mitogen/analysis , Urinary Bladder Neoplasms/metabolism , Adenoma/etiology , Adenoma/pathology , Cystitis/metabolism , Cystitis/pathology , Glycoproteins/analysis , Hamartoma/pathology , Histocytochemistry , Humans , Kidney Tubules/analysis , Lectins/metabolism , Mesonephros/analysis , Metaplasia , Peanut Agglutinin , Polysaccharides/analysis , Staining and Labeling , Urinary Bladder/pathology , Urinary Bladder Neoplasms/etiology , Urinary Bladder Neoplasms/pathologyABSTRACT
Three different tests on houseflies (Musca domestica L.) revealed that both pheromone-free pseudoflies and male partner flies exhibit in the presence of mixtures of long-chain (Z)-9-alkenes or pure (Z)-9-tricosene enhanced releasing effects for two optical cues, which stimulate male houseflies to mating strikes and houseflies of both sexes to aggregation.
