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  • H YAJIMA
  • 1964
I N an earlier study (Yajima, 1960) of centrifugation of the egg of Chironomus dorsalis, the author obtained various types of double malformation (double cephalon and double abdomen) which are correlated with the orientation of the egg at the time of centrifugation. As a result the author proposed (1) that the embryonic character of Chironomus was(More)
BACKGROUND Multi-walled carbon nanotubes (MWCNT)s are suspected to induce pulmonary and pleural cancers due to their asbestos-like configurations. Therefore, accurate measurement of inhaled nanotubes in target organs is crucial for assessing cancer risk. Conventionally, nanotubes are measured after combustion at high temperature for conversion into CO2;(More)
Tenascin-C is an adhesion modulatory matrix protein that is highly expressed in tumors; however, its biochemical activity involved in tumorigenesis is not fully understood. On the other hand, increasing evidence indicates the importance of integrin α5β1 in cancer development. We previously demonstrated that tenascin-C harbors a functional site that can be(More)
m-Acetylphenyl-beta-d-glucopyranosides and m-acetylphenyl-alpha/beta-d-mannopyranosides were synthesized by the Koenigs-Knorr, Mitsunobu, and Helferich reactions as key glycosylation reactions, respectively. Their spectroscopic properties and antioxidative activities were characterized as potential ultraviolet B-ray absorbents.
Oral administration of 2,4-dichloro-1-nitrobenzene (2,4-DCNB) causes kidney tumors in the rat. The objective of the present study was to identify the chemical structure of 2,4-DCNB metabolites in urine. Urine from 2,4-DCNB fed rats was more yellow than urine from control rats, exhibiting a broad UV-spectrum around a peak wavelength of 360 nm; the control(More)
Here, we show that fibronectin (FN) peptides derived from two distinct regions promote the insulin-induced adipocyte differentiation of ST-13 cells by preventing FN fibrillogenesis. ST-13 cells formed numerous FN fibrils under nonadipogenic conditions, whereas this FN fibrillogenesis was suppressed by adipose induction with insulin. The insulin-induced(More)
Anoikis, apoptosis because of loss of cell anchorage, is crucial for tissue homeostasis. Fibronectin not only provides a scaffold for cell anchorage but also harbors a cryptic antiadhesive site capable of inducing β1-integrin inactivation. In this study, this cryptic antiadhesive site is implicated in spontaneous induction of anoikis. Nontransformed(More)
Fibronectin plays important roles in erythropoiesis through the fibronectin receptors VLA-4 and VLA-5. However, the substantial role of these fibronectin receptors and their functional assignment in erythroid differentiation are not yet fully understood. Here, we investigated the effects of cell adhesion to fibronectin on erythroid differentiation using(More)
Here, we report biomodification of temperature-responsive culture surfaces with biotinylated biomolecules utilizing streptavidin and biotinylation of the surfaces. Poly(N-isopropylacrylamide-co-2-carboxyisopropylacrylamide) was covalently grafted onto tissue culture polystyrene (TCPS) dishes. Biotinylated Arg-Gly-Asp-Ser (RGDS) peptides with different(More)