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Basal Cell Carinoma

S A Maslakova, M Q Martindale, J L Norenburg
Nemerteans have been alleged to belong to a protostome clade called the Trochozoa that includes mollusks, annelids, sipunculids, echiurids, and kamptozoans and is characterized by, among other things, the trochophore larva. The trochophore possesses a prototroch, a preoral belt of specialized ciliary cells, derived from the trochoblast cells. Nemertea is the only trochozoan phylum for which presence of the trochophore larva possessing a prototroch had never been shown. However, so little is known about nemertean larval development that comparing it with development of other trochozoans is difficult...
July 2004: Evolution & Development
Svetlana A Maslakova, Mark Q Martindale, Jon L Norenburg
The first description of the cleavage program of the palaeonemertean Carinoma tremaphoros (a member of a basal clade of the Nemertea) is illustrated by confocal microscopy and microinjection and compared to development of more derived nemerteans and other eutrochozoans (Annelida, Mollusca, Sipunculida and Echiurida). Lineage tracers were injected into individual blastomeres of C. tremaphoros at the 2-, 4-, 8- and 16-cell stage. Subsequent development was followed to the formation of simple (so-called planuliform) planktonic larvae to establish the ultimate fates of the blastomeres...
March 15, 2004: Developmental Biology
H Tada, M Hatoko, A Tanaka, M Kuwahara, T Muramatsu
Reduction or absence of cell-cell adhesion molecules has been reported in various carinomas and the abnormal expression of these molecules contributes to the invasive and metastatic behavior of malignant tumor cells. In epidermal keratinocytes, the main cell-cell adhesion systems are adherens junctions and desmosomes. Previous studies have shown that, in skin carcinomas, the decreased expression of E-cadherin, major constitutional glycoprotein of adherens junctions, is associated with the invasive and metastatic ability of the tumor cells...
January 2000: Journal of Cutaneous Pathology
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