Ultrastructural and Immunohistochemical Studies on Uptake and Distribution of FITC-Conjugated PLGA Nanoparticles Administered Intratracheally in Rats     

Hara K  Tsujimoto H  Huang CC  Kawashima Y  Ando R  Kusuoka O  Tamura K  Tsutsumi M 《Journal of toxicologic pathology》2012,25(1):19-26

Polylactide-glycolide (PLGA) nanoparticles have been developed as pulmonary drug delivery carriers. To investigate their behavior, small- (d50 = 74 nm) and large-sized (d50 = 250 nm) FITC-conjugated PLGA nanoparticles were intratracheally administered to rats and were traced for 5, 30 and 60 minutes and 24 hours after administration (HAT). Immunohistochemically, a, FITC-positive reaction was observed in type-I alveolar epithelial cells (type-I AEC), endothelial cells and alveolar macrophages in the lungs from 5 minutes after treatment (MAT) to 24 HAT in both nanoparticle groups. In the kidneys, a positive reaction was observed in proximal tubular epithelial cells at 30 MAT; the reaction peaked at 60 MAT and was reduced at 24 HAT, while no positive reaction was seen in other sites. Ultrascructurally, the number of membrane-bound vesicles, which were approximately 70 nm in size and hard to distinguish from pinocytic vesicles, apparently increased in type-I AEC and endothelial cells at 5 MAT in the small-sized group, in comparison with the control group receiving physiological saline. The number of vesicles in the large-sized group was almost same as that in the control group. On the other hand, in both nanoparticle groups, lysosomes filled with nanoparticles appeared in alveolar macrophages from 30 MAT to 24 HAT. These results indicate that PLGA nanoparticles might be quickly transferred from the alveolar space to the blood vessel via type-I alveolar epithelial cells and excreted into urine, and that there is a threshold for particle size, less than approximately 70 nm in diameter, with regard to absorption through the alveolar wall.  相似文献   

What is your diagnosis? Fine‐needle aspirate of a third eyelid mass in a Paint horse     

Gupta A  Bhaskaran M  Storey E  Carter RT  Wakamatsu N  Gaunt SD 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2012,41(2):299-300

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Renal expression and urinary excretion of liver-type fatty acid-binding protein in cats with renal disease     

Masaaki Katayama  Keiichi Ohata  Tamako Miyazaki  Rieko Katayama  Nobuko Wakamatsu  Misa Ohno  Tetsuro Yamashita  Tsuyoshi Oikawa  Takeshi Sugaya  Masao Miyazaki 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2020,34(2):761-769

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Venting of carbon dioxide-rich fluid and hydrate formation in mid-okinawa trough backarc basin     

Sakai H  Gamo T  Kim ES  Tsutsumi M  Tanaka T  Ishibashi J  Wakita H  Yamano M  Oomori T 《Science (New York, N.Y.)》1990,248(4959):1093-1096

Carbon dioxide-rich fluid bubbles, containing approximately 86 percent CO(2), 3 percent H(2)S, and 11 percent residual gas (CH(4) + H(2)), were observed to emerge from the sea floor at 1335- to 1550-m depth in the JADE hydrothermal field, mid-Okinawa Trough. Upon contact with seawater at 3.8 degrees C, gas hydrate immediately formed on the surface of the bubbles and these hydrates coalesced to form pipes standing on the sediments. Chemical composition and carbon, sulfur, and helium isotopic ratios indicate that the CO(2)-rich fluid was derived from the same magmatic source as dissolved gases in 320 degrees C hydrothermal solution emitted from a nearby black smoker chimney. The CO(2)-rich fluid phase may be separated by subsurface boiling of hydrothermal solutions or by leaching of CO(2)-rich fluid inclusion during posteruption interaction between pore water and volcanogenic sediments.  相似文献   

Treatment of poplar callus with ferulic and sinapic acids I: incorporation and enhancement of lignin biosynthesis     

Katsuyoshi Hamada  Yuji Tsutsumi  Kazuchika Yamauchi  Kazuhiko Fukushima  Tomoaki Nishida 《Journal of Wood Science》2003,49(4):333-338

Ferulic acid (FA), tetradeuteroferulic acid (DFA), sinapic acid (SA), or heptadeuterosinapic acid (DSA) was exogenously supplied to poplar (Populus alba L.) callus. Administration of FA or SA increased the lignin content of the callus to about twice that of the control callus. Gas chromatographic analysis of the alkali hydrolysate of the cell wall residue revealed that only a trace amount of SA was bound to the cell wall, and the amount of FA was less than 2% of the total callus lignin. Thioacidolysis of the DFA-treated callus indicated that DFA is effectively converted to both coniferyl and sinapyl alcohols and then incorporated into the corresponding lignin. Incorporation of DSA into syringyl lignin or guaiacyl lignin was not observed, but yields of syringyl lignin thioacidolysis products were markedly increased by DSA treatment of the callus. These results suggest that SA may not be a precursor of sinapyl alcohol and syringyl lignin per se, but it may induce or enhance the biosynthesis of syringyl lignin in poplar callus.  相似文献   

Lignification and peroxidase in tension wood ofEucalyptus viminalis seedlings     

Wataru Aoyama  Akira Matsumura  Yuji Tsutsumi  Tomoaki Nishida 《Journal of Wood Science》2001,47(6):419-424

Seedlings ofEucalyptus viminalis were grown for 50 days with their stems bent so tension wood would form. Every 10 days the lignin content, monomeric composition, and peroxidase activity in the tension wood were compared with those in the lower side (opposite wood) and in vertically grown controls. The lignin content in the developing tension wood started to decrease after 10 days of bending and kept decreasing for 50 days, whereas those in control plants and opposite wood remained almost unchanged. The yields of syringaldehyde from tension wood by nitrobenzene oxidation increased, and consequently the syringyl/ guaiacyl ratio of the lignin was higher in tension wood than in opposite wood and control plants. The peroxidase ionically bound to the cell walls (IPO) catalyzed oxidation of guaiacol and syringaldazine. The syringaldazineoxidizing activity of IPO from tension wood increased, whereas the activities of IPO from opposite wood and control plants did not show any marked change. In tension wood the increase in syringaldazine-oxidizing activity of IPO was consistent with an increase in the syringaldehyde yield. This suggests that IPO contributes to syringyl lignin deposition as other enzymes involved in the monolignol biosynthesis do in tension wood formation.This study was presented at the 50th Annual Meeting of the Japan Wood Research Society, Kyoto, April 2000  相似文献   

Pathogenicity of Eimeria tsunodai for Japanese quails (Coturnis coturnix japonica) and susceptibility of the coccidium to some drugs     

Y Tsutsumi  K Tsunoda 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1972,34(3):115-120

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Potential use of cholesterol lipoprotein profile to confirm obesity status in dogs     

Mori N  Lee P  Kondo K  Kido T  Saito T  Arai T 《Veterinary research communications》2011,35(4):223-235

A common sign of obesity, in dogs, is hyperlipidemia, which is characterized by hypercholesterolemia and/or hypertriglycemia. Hyperlipidemia can be caused by a quantitative increase in circulating lipoproteins (LP) or by a higher lipid concentration in the various LP classes. In this study, we sought to determine whether aberrations occur with cholesterol lipoprotein profile, especially with sub HDL-cholesterol fraction % in obese dogs. Using clinically healthy and disease free (no overt signs) body condition score classified obese dogs, of all ages, we attempted to determine the influence of age, gender and obesity status on cholesterol lipoprotein profiling. Overall, no aberration in pattern was observed in obese dogs <8 years of age. However, in older obese animals (≥8 years of age), the general aberration pattern to cholesterol lipoprotein observed was that a significant decrease in HDL2 and 3 fraction % occurs with a concomitant increase in either HDL1-Cho or VLDL and LDL -Cho fraction % depending on gender. Linear regression analysis indicated that obesity status appears to significantly affect total cholesterol, HDL2 and 3-Cho, VLDL and LDL-Cho levels (P = 0.02, 0.046, and 0.045, respectively), whereas it is borderline with HDL1-Cho (P = 0.062). On the other hand, age significantly influenced TG, Total cholesterol, and HDL1-Cho levels (P = 0.009, 0.006, and 0.002, respectively), while gender influenced VLDL and LDL-Cho (P = 0.024) level. Therefore, aberrations in cholesterol lipoprotein profile pattern might be of potential use to assess and diagnose obesity status, in conjunction with BCS, especially of older overweight animals which might be considered borderline obese.  相似文献   

The deficiency symptom of microelements on rice plant     

Akio Fujiwara  Michio Tsutsumi 《Soil Science and Plant Nutrition》2013,59(1):41-42

As the rice plant is usually cultured, in practice, on a waterlogged field associated with heavy irrigation, it could be supposed that the rice plant may be supplied with a sufficient amount of microelements and rarely suffers from a lack of them.  相似文献   

Intraocular and periocular lymphoma in dogs and cats: a retrospective review of 21 cases (2001–2012)     

Juri Ota‐Kuroki  John M. Ragsdale  Bhupinder Bawa  Nobuko Wakamatsu  Keiichi Kuroki 《Veterinary ophthalmology》2014,17(6):389-396

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