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8. Morphological and molecular differentiation in the rhodymenia corallina complex (Rhodymeniaceae, rhodophyta) from Central Peru [Diferenciación morfológica y molecular en el complejo rhodymenia corallina (Rhodymeniaceae, rhodophyta) de Perú Central]

Author

Perez-Alania M., Arakaki N., Gil-Kodaka P., Tellier F., and Ramírez M.E.

Subjects
COI-5P, purl.org/pe-repo/ocde/ford#1.06.03 [http], RbcL, Rhodymenia multidigitata, Phylogeny, Rhodymenia howeana
Abstract

Seven species of Rhodymenia have been recorded for the coast of Peru, where six of them grow on the central coast: R. corallina, R. howeana, R. multidigitata, R. flabellifolia, R. skottsbergii and R. californica. The most controversial taxonomically is R. corallina, from which R. howeana and R. multidigitata have been separated, only on the basis of external morphological characters (stipe form and frond habit). Recent and intensive collections of this species complex in the central coast of Peru (9°S to 15°S) have allowed gathering several morphotypes, evidencing high morphological variability, which makes difficult to differentiate each of the taxa involved. The aim of this work was to clarify the taxonomy of this complex by combining morphological data, both vegetative and reproductive, and genetic sequences through the use of rbcL and COI-5P markers. Specimens from Callao, type locality of R. howeana and R. multidigitata, were molecularly analyzed together with material from the central (Casma to Marcona, 9-15°S) and northern coast of Peru (Piura, 6°S), as well as northern Chile (Coquimbo, 30°S), solving two Rhodymenia groups. A first phylogenetic group, associated to R. corallina from Chile (Coquimbo, 30°S), is distributed along the entire Peruvian central coast (Casma to Marcona, 9-15°S), and a second group is restricted to the northern coast of Peru (Piura to Casma, 6-9°S). These groups differ in characters of external and reproductive morphology. Based on features of the tetrasporangial sori, R. howeana is recognized for northern Peru. © 2019, University of Valparaiso. All rights reserved.

Published
2019

9. Adenomas no funcionantes: análisis retrospectivo de 202 pacientes

Author

Slavinsky, P.T., Cervio, A., Sevlever, G., Arakaki, N., Antico, J., and Katz, D.A.

Subjects
Adenoma Chromophobe, Ki-67 Antigen, Radioterapia, Radiotherapy, Índice de proliferación Ki-67, Neurosurgery, Pituitary Neoplasms, Adenomas hipofisarios no funcionantes, Neurocirugía, Tumores hipofisarios
Abstract

RESUMEN Los pacientes con adenomas hipofisarios constituyen una población heterogénea y requieren un enfoque individualizado. El objetivo de nuestro trabajo fue analizar nuestra población con adenomas hipofisarios no funcionantes (ACNF) y evaluar factores pronóstico de crecimiento (como el Ki-67) que ayuden en la toma de decisiones. Se realizó un análisis retrospectivo de 202 pacientes, incluyendo evaluación basal, enfoque terapéutico y evolución tumoral en 2 grupos: pacientes con conducta expectante (n = 69) y pacientes con cirugía (n = 133). La serie tuvo 55% de pacientes mujeres y la edad media al diagnóstico fue de 49 años. Los motivos de consulta más frecuentes fueron incidentaloma hipofisario y alteraciones visuales. Radiológicamente, 83% fueron macroadenomas, 77% invasivos y 55% mostraron compromiso visual. Entre los adenomas invasores, el 53% tenían disfunción hipofisaria, siendo el hipogonadismo el hallazgo más frecuente. El tratamiento inicial fue la cirugía en el 65,8% realizándose por vía transnasal en el 79% de los casos. Las complicaciones más frecuentes fueron diabetes insípida transitoria e hiponatremia, con mayor incidencia de diabetes insípida permanente en la cirugía transcraneal. La inmunohistoquímica mostró gonatropinomas en el 43,4% de los casos y fue negativa en el 37,7%. Doce adenomas tuvieron índice de proliferación Ki-67 ≥3%. Luego de la cirugía 56,8% de los pacientes mejoraron el campo visual, 22,6% recuperó alguna función endocrina y 18,8% agregó un nuevo déficit. En pacientes no operados, se observó crecimiento tumoral en 5,6% de los adenomas Hardy 1-2 y en el 21% de los Hardy 3-4. Entre los adenomas operados, aquellos sin resto tumoral postoperatorio no presentaron recurrencia. De los tumores con remanente postoperatorio (78,6%) no irradiados, el 41,5% mostró recrecimiento lesional al seguimiento. Este porcentaje se eleva a 66,6% en aquellos con Ki-67 ≥3% y disminuye a 12% en los que recibieron radioterapia. ABSTRACT Patients with pituitary adenomas are a heterogeneous population and require an individualized approach. The aim of our study was to analyze our population of patients with nonfunctioning pituitary adenomas (NFA) and to evaluate prognostic growth factors (such as Ki-67) that help in decision making. A retrospective analysis of 202 patients, including baseline assessment, therapeutic approach and tumor evolution was performed in 2 groups: expectant management (n = 69) and surgery (n = 133). The mean age at diagnosis was 49 years, 55% women. The most frequent reasons for consultation were pituitary incidentaloma and visual impairment. Eighty three percent were macroadenomas, 77% invasive, and 55% with visual impairment. Among the invasive adenomas, 53% had pituitary dysfunction, with hypogonadism being the most frequent finding. The initial treatment was surgery in 65.8%, 79% of them through transnasal approach. The most frequent complications were transient diabetes insipidus and hyponatremia, with a higher incidence of permanent diabetes insipidus in transcranial surgery. The immunohistochemistry showed: 43.4% gonadotropinomas, 37.7% negative. Twelve adenomas had proliferation index Ki-67 ≥3%. After surgery, 56.8% improved the visual fields, 22.6% recovered some endocrine function and 18.8% added a new deficit. In non-operated patients, tumor growth was observed in 5.6% of the Hardy 1-2 adenomas and 21% of the Hardy 3-4 adenomas. Among the operated adenomas, those without postoperative tumor residue did not present recurrence. In tumors with non-irradiated postoperative remnant (78.6%), 41.5% increased. This percentage rises to 66.6% in those with Ki-67 ≥3%, and decreases to 12% in those who received radiotherapy.

Published
2018

16. Transport properties of Y1-xNdxCo2compounds

Author

Uchima, K, primary, Takeda, M, additional, Zukeran, C, additional, Nakamura, A, additional, Arakaki, N, additional, Komesu, S, additional, Takaesu, Y, additional, Hedo, M, additional, Nakama, T, additional, Yagasaki, K, additional, Uwatoko, Y, additional, and Burkov, A T, additional

Published
2012
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17. Effect of pressure on thermopower of EuNi2Ge2

Author

Nakamura, A, primary, Nakama, T, additional, Uchima, K, additional, Arakaki, N, additional, Zukeran, C, additional, Komesu, S, additional, Takeda, M, additional, Takaesu, Y, additional, Nakamura, D, additional, Hedo, M, additional, Yagasaki, K, additional, and Uwatoko, Y, additional

Published
2012
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19. RARE TUMORS

Author

Kiyotani, C., primary, Uno, T., additional, Ogiwara, H., additional, Morota, N., additional, Nakazawa, A., additional, Tsutsumi, Y., additional, Masaki, H., additional, Mori, T., additional, Sanz, J. A. S., additional, Guibelalde, M., additional, Tavera, A., additional, Herandez, I., additional, Ibanez, J., additional, Brell, M., additional, Mas, A., additional, Muller, H. L., additional, Gebhardt, U., additional, Warmuth-Metz, M., additional, Pietsch, T., additional, Sorensen, N., additional, Kortmann, R.-D., additional, Stapleton, S., additional, Gonzalez, I., additional, Steinbrueck, S., additional, Rodriguez, L., additional, Tuite, G., additional, Krzyzankova, M., additional, Mertsch, S., additional, Jeibmann, A., additional, Kordes, U., additional, Wolff, J., additional, Paulus, W., additional, Hasselblatt, M., additional, Nonaka, Y., additional, Hara, S., additional, Fukazawa, S., additional, Shimizu, K., additional, Ben-Arush, M., additional, Postovsky, S., additional, Toledano, H., additional, Peretz-Nahum, M., additional, Fujimura, J., additional, Sakaguchi, S., additional, Kondo, A., additional, Saito, Y., additional, Shimoji, K., additional, Ohara, Y., additional, Arakawa, A., additional, Saito, M., additional, Shimizu, T., additional, Benesch, M., additional, von Bueren, A. O., additional, Dantonello, T., additional, von Hoff, K., additional, Leuschner, I., additional, Claviez, A., additional, Bierbach, U., additional, Kropshofer, G., additional, Korinthenberg, R., additional, Graf, N., additional, Suttorp, M., additional, Kortmann, R. D., additional, Friedrich, C., additional, Klingebiel, T., additional, Koscielniak, E., additional, Rutkowski, S., additional, Mesa, M., additional, Sanchez, M., additional, Mejia, J., additional, Pena, G., additional, Dussan, R., additional, Cabeza, M., additional, Storino, A., additional, Dincer, F., additional, Roffidal, T., additional, Powell, M., additional, Berrak, S., additional, Wolff, J. E., additional, Fouyssac, F., additional, Delaunay, C., additional, Vignaud, J.-M., additional, Schmitt, E., additional, Klein, O., additional, Mansuy, L., additional, Chastagner, P., additional, Cruz, O., additional, Guillen, A., additional, Garcia, G., additional, Alamar, M., additional, Candela, S., additional, Roussos, I., additional, Garzon, M., additional, Sunol, M., additional, Muchart, J., additional, Rebollo, M., additional, Mora, J., additional, Diez, B., additional, Muggeri, A., additional, Arakaki, N., additional, Meli, F., additional, Sevlever, G., additional, Tsitouras, V., additional, Pettorini, B., additional, Fellows, G., additional, Blair, J., additional, Didi, M., additional, Daousi, C., additional, Steele, C., additional, Javadpour, M., additional, Sinha, A., additional, Hishii, M., additional, Ishii, H., additional, Miyajima, M., additional, Arai, H., additional, Dvir, R., additional, Sayar, D., additional, Levin, D., additional, Ben-Sirah, L., additional, Constantini, S., additional, Elhasid, R., additional, Gertsch, E., additional, Foreman, N., additional, Valera, E. T., additional, Brassesco, M. S., additional, Machado, H. R., additional, Oliveira, R. S., additional, Santos, A. C., additional, Terra, V. C., additional, Barros, M. V., additional, Scrideli, C. A., additional, Tone, L. G., additional, Merino, D., additional, Pienkowska, M., additional, Shlien, A., additional, Tabori, U., additional, Gilbertson, R., additional, Malkin, D., additional, Jeeva, I., additional, Chang, B., additional, Long, V., additional, Picton, S., additional, Burton, D., additional, Clark, S., additional, Kwok, C., additional, Mokete, B., additional, Rafiq, O., additional, Simmons, I., additional, Shing, M. M. K., additional, Li, C. K., additional, Chan, G. C. F., additional, Ha, S. Y., additional, Yuen, H. L., additional, Luk, C. W., additional, Ling, S. C., additional, Li, R. C. H., additional, Yoon, J. H., additional, Park, H. J., additional, Shin, H. J., additional, Park, B.-K., additional, Kim, J.-Y., additional, Jung, H. L., additional, Ra, Y. S., additional, Ghim, T. T., additional, Hartung, S., additional, Garami, M., additional, Traunecker, H., additional, Thall, P., additional, Mahajan, A., additional, Sumerauer, D., additional, Grillner, P., additional, Orrego, A., additional, Mosskin, M., additional, Gustavsson, B., additional, Holm, S., additional, Peters, N., additional, Rogers, M., additional, Chowdry, S., additional, Selman, W., additional, Mitchell, A., additional, Bangert, B., additional, Ahuja, S., additional, Laschinger, K., additional, Gold, D., additional, Stearns, D., additional, Wright, K., additional, Gupta, K., additional, Klimo, P., additional, Ellison, D., additional, Keating, G., additional, Eckel, L., additional, Giannini, C., additional, Wetjen, N., additional, Patton, A., additional, Zaky, W., additional, McComb, G., additional, Finlay, J., additional, Grimm, J., additional, Wong, K., additional, Dhall, G., additional, Gilles, F., additional, Ormandy, D., additional, Alston, R., additional, Estlin, E., additional, Gattamaneni, R., additional, Birch, J., additional, Kamaly-Asl, I., additional, Hemenway, M., additional, Rush, S., additional, Reginald, Y. A., additional, Nicolin, G., additional, Bartel, U., additional, Buncic, J. R., additional, Aguilera, D., additional, Flamini, R., additional, Mazewski, C., additional, Schniederjan, M., additional, Hayes, L., additional, Boydston, W., additional, MacDonald, T., additional, Fleming, A., additional, Jabado, N., additional, Saint-Martin, C., additional, Albrecht, S., additional, Ramsay, D. A., additional, Farmer, J. P., additional, Bendel, A., additional, Hansen, M., additional, Dugan, S., additional, and Mendelsohn, N., additional

Published
2012
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39. Mating disruption by a synthetic sex pheromone in the white grub beetle Dasylepida ishigakiensis (Coleoptera: Scarabaeidae) in the laboratory and sugarcane fields.

Author

Yasui, H., Wakamura, S., Fujiwara-Tsujii, N., Arakaki, N., Nagayama, A., Hokama, Y., Mochizuki, F., Fukumoto, T., Oroku, H., Harano, K., and Tanaka, S.

Subjects
BEETLES, PHEROMONES, ANIMAL sexual behavior, SUGARCANE, BUTANOL, PEST control
Abstract

A serious sugarcane pest, Dasylepida ishigakiensis, remains in the soil during most of its life cycle except for a short period for mating. Mating disruption by an artificial release of the sex pheromone (R)-2-butanol (R2B), therefore, may be a feasible method to control this pest. We examined the effects of artificial release of R2B and its related compounds, (S)-2-butanol (S2B) and the racemic 2-butanol (rac-2B), on the mating success of this beetle both in the laboratory and in the field. In flight tunnel experiments, almost all males orientated towards a R2B-releasing source and 40% of them landed on the source. When the atmosphere was permeated with R2B, the frequency of males landing on the model was significantly reduced. Both rac-2B and S2B were less effective, but substantial reduction in landing success by males was achieved at higher rac-2B concentrations. R2B released from polyethylene dispensers in sugarcane plots greatly reduced not only the proportion of females mated with males but also the number of males caught by R2B-baited traps, indicating that male mate-searching behaviour was strongly affected by the released R2B. Similar inhibitory effects on male behaviour were also observed when tube- or rope-type dispensers released high rac-2B concentrations in the field. These results indicate that it would be highly possible to control D. ishigakiensis through the disruption of the sexual communication by releasing either synthetic R2B or rac-2B. [ABSTRACT FROM AUTHOR]

Published
2012
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43. Prostaglandin E2 Predominantly Induces Production of Hepatocyte Growth Factor/Scatter Factor in Human Dental Pulp in Acute Inflammation.

Author

Ohnishi, T., Suwa, M., Oyama, T., Arakaki, N., Torii, M., and Daikuhara, Y.

Subjects
HEPATOCYTE growth factor, DENTAL pulp, PROSTAGLANDINS E, PULPITIS, INTERLEUKINS, DOSE-response relationship in biochemistry, MESSENGER RNA, REGENERATION (Biology)
Abstract

Hepatocyte growth factor (HGF), which is also known as the scatter factor, is a broad-spectrum and multifunctional cytokine, mediates epithelial-mesenchyme interaction, and is shown to be involved in the development and regeneration of various tissues, including tooth. Here, we report that HGF was present in adult human dental pulps, and its levels increased during acute inflammation of the tissue. Levels of HGF mRNA in dental pulps also increased with inflammation, as determined by reverse-transcription/polymerase chain-reaction. The production of HGF in fibroblasts from dental pulps in culture was dose-dependently stimulated by inflammatory cytokines such as interleukin (IL)-1α and tumor necrosis factor (TNF)-α, and by prostaglandin (PG) E2, as determined by an enzyme-linked immunosorbent assay. We also showed that indomethacin did not affect the increase in HGF production by the cells with IL-1α, TNF-α, and PGE2. The levels of HGF mRNA in the cells were simultaneously increased by these stimulants, as determined by Northern blotting. Since the production of PGs is known to increase at the beginning of inflammation, PGE2 may be involved in the regeneration of dental pulps by the induction of HGF expression after inflammation. [ABSTRACT FROM AUTHOR]

Published
2000
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44. Observations of the migration of adult Dasylepida ishigakiensis(Coleoptera: Scarabaeidae) from belowground to the soil surface and their reproductive status by MRI

Author

Fujiwara-Tsujii, N., Yasui, H., Sekiyama, Y., Horigane, A., Ono, H., and Arakaki, N.

Abstract

Field observations indicate that white grub beetles Dasylepida ishigakiensisNiijima et Kinoshita (Coleoptera: Scarabaeidae) pupate approximately 40 cm underground and then emerge from the soil surface as adults. Although the factors influencing adult emergence from the soil have been studied, the migration of adults from belowground to the surface has never been characterized. In this study, the vertical movement of virgin adults from natural eclosion depths to their emergence from the soil surface was investigated. Virgin adults were introduced at a depth of 40 cm from the soil surface in wooden-framed glass cases, and the vertical position of each individual was checked every day. Both females and males emerged near the soil surface at approximately day 50 after they were transferred from 24 °C to 18 °C conditions. The maturity of the ovaries in unemerged and emerged females was also observed by magnetic resonance imaging. All females that had emerged from the soil possessed developed oocytes, and most possessed mature eggs. The cross-sectional area of eggs was determined in magnetic resonance images and compared between unemerged and emerged females, and the egg areas of emerged females were significantly larger than those of unemerged females. Our results indicate that the timing of female emergence from soil corresponded to ovary maturity in this species.

Published
2013
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45. Sex pheromone components of pyralid mothsTerastia subjectalisandAgathodes ostentalis feedingon the coral tree,Erithrina variegata: Two sympatric species share common components in different ratios

Author

Wakamura, S. and Arakaki, N.

Abstract

Summary. Two common components, identified as ( E)-11-hexadecenal (E11-16:Ald) and ( E, E)-10,12-hexadecadienal ( E10 E12-16:Ald), were found in the extract of virgin females of two sympatric pyralid moths, Terastia subjectalis Lederer, and Agathodes ostentalis (Geyer). The amount of E11-16:Ald and E10E12-16:Ald was 0.12 and 2.8 ng/female for T. subjectalis and 2.0 and 1.8 ng/female for A. ostentalis, respectively. Hexadecanal (16:Ald) was also found at 0.7 ng/female in the extract of A. ostentalis, but EAG activity was unclear. In the field, T. subjectalis and A. ostentalis males were captured with species specific blends in the proportions of 5:95 and 50:50 blends. Blends attractive to one species did not attract the opposite one. Rubber septa loaded with 1 mg each of 5:95 and 50:50 blends of E11-16:Ald and E10E12-16:Ald were as attractive as two virgin females of T. subjectalis and A. ostentalis , respectively. This demonstrated that different ratios of shared pheromone components could provide species specific cues for critical mate location in the two sympatric pyralid moths. It is suggested that directional selection probably occurs in the pheromone blends in opposite directions in both species.

Published
2004
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46. Wolbachia–mediated parthenogenesis in the predatory thrips Franklinothrips vespiformis(Thysanoptera: Insecta)

Author

Arakaki, N., Miyoshi, T., and Noda, H.

Abstract

Wolbachiaare bacterial endosymbionts in arthropods and filarial nematodes. They cause thelytoky, which is a form of parthenogenesis in which females produce females without males, in hymenopteran insects. Infection of this parthenogenesisinducing Wolbachiahas been restricted to the order Hymenoptera, but was found in another insect order, Thysanoptera. A parthenogenetic colony of a predatory thrips Franklinothrips vespiformis(Aeolothripidae) possessed B-group Wolbachia. Male progeny were produced from this thrips by heat and tetracycline treatments. Males produced motile sperm, which were transferred to the female spermatheca by mating. However, the mating did not affect the sex ratios of the next generation, suggesting that the sperm do not fertilize the eggs.

Published
2001
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47. Involvement of oxidative stress in tumor cytotoxic activity of hepatocyte growth factor/scatter factor.

Author

Arakaki, N, Kajihara, T, Arakaki, R, Ohnishi, T, Kazi, J A, Nakashima, H, and Daikuhara, Y

Abstract

In this study, we show that N-acetylcysteine (NAC), a precursor of glutathione and an intracellular free radical scavenger, almost completely prevented hepatocyte growth factor (HGF)-suppressed growth of Sarcoma 180 and Meth A cells, and HGF-induced apoptosis, assessed by DNA fragmentation, and increase in caspase-3 activity, in Sarcoma 180 cells. The reduced form of glutathione also prevented HGF-suppressed growth of the cells as effective as NAC. Ascorbic acid partially prevented the effect of HGF, but other antioxidants such as superoxide dismutase, catalase, and vitamin E, and the free radical spin traps N-t-butyl-alpha-phenylnitrone and 3,3,5, 5-tetramethyl-1-pyrroline-1-oxide did not have protective effects. HGF caused morphological changes of the cells, many cells showing condensation and rounding, and enhanced the generation of intracellular reactive oxygen species (ROS) as judged by flow cytometric analysis using 2',7'-dichlorofluorescein diacetate. NAC completely prevented both HGF-induced morphological changes and the enhancement of ROS generation in the cells. However, NAC did not prevent the HGF-induced scattering of Madin-Darby canine kidney cells. To our knowledge, this is the first report that HGF stimulates the production of ROS, and our results suggest the involvement of oxidative stress in the mechanism by which HGF induces growth suppression of tumor cells.

Published
1999

50. Hepatocyte growth factor levels in Legionella pneumonia: A retrospective study

Author

Yara Satomi, Arakaki Noriko, Haranaga Syusaku, Tamaki Yuichiro, Tamayose Maki, Koide Michio, Hibiya Kenji, Furugen Makoto, Akamine Morikazu, Higa Futoshi, Tateyama Masao, and Fujita Jiro

Subjects
Infectious and parasitic diseases, RC109-216
Abstract

Abstract Background Hepatocyte growth factor (HGF) is known to be involved in the resolution of pulmonary inflammation and repair of acute lung injury. Legionella pneumonia is sometimes complicated by acute lung injury. Our study aimed to determine the role of serum HGF levels in Legionella pneumonia. Methods Sera from patients with Legionella pneumonia (42 cases), other bacterial pneumonia (33 cases), pulmonary tuberculosis (19 cases), and normal controls (29 cases) were collected. The serum HGF levels for each serum sample were determined by sandwich ELISA. Clinical and laboratory data were collected by reviewing the medical charts. Results Serum HGF levels were higher in patients with Legionella pneumonia than in those with other bacterial pneumonia, pulmonary tuberculosis, and controls. The HGF levels were compared with white blood cell counts, C-reactive protein, Alanine amino- transferase, and lactate dehydrogenase (LDH). The HGF levels were correlated to serum LDH levels. Moreover, serum HGF levels were significantly higher in non-survivors than in survivors. Conclusions HGF levels increased in severer pneumonia caused by Legionella, suggesting that HGF might play a significant role in the Legionella pneumonia.

Published
2011
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