Rick Kurashima

Tokyo Dental College

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Co-Authors

Todd E. Shelly

Hawaii Agriculture Research Center

Jon I. Nishimoto

Hawaii Agriculture Research Center

Thomas Fezza

Animal and Plant Health Inspection Service

David A. Dean

University of Rochester

Chiou Ling Chang

Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center

Christopher Albrecht

Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center

Eric B. Jang

Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center

Daniel Walega

J. Komatsu

Agricultural Research Service

D. O. McInnis

Agricultural Research Service

Cooperative Institutions

Agricultural Research Service

United States Department of Agriculture

Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center

U.S. Vegetable Laboratory

Tokyo Dental College

Animal and Plant Health Inspection Service

Hawaii Agriculture Research Center

Nagoya University

The University of Tokyo

University of California, Berkeley

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Weathering of Methyl Eugenol Solid Dispensers: Effects on Residual Amount, Release Rate, and Field Capture of Bactrocera dorsalis Males (Diptera: Tephritidae)

Florida Entomologist (2022)

Todd E. Shelly Rick Kurashima Lisa Mosser Rodolfo Mesa Martin Corinna Bazelet

La mosca oriental de la fruta, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae), es una plaga agrícola mundial que ataca una gran variedad de frutas y verduras de importancia comercial. Muchos países mantienen programas de trampeo para detectar incursiones de esta plaga, y el trampeo depende en gran medida del metil eugenol, un poderoso atrayente para los machos de B. dorsalis, que generalmente se aplica como líquido a una mecha de algodón contenida dentro de las trampas Jackson. Sin embargo, este método requiere mucho tiempo, incurre en una alta volatilidad (pérdida) del señuelo y conlleva riesgos para la salud. Los datos existentes indican que los dispensadores sólidos de metil eugenol son una alternativa viable en vez del uso de señuelos líquidos. Basado en el trabajo de campo en cafetal de Hawái, el presente estudio muestra diferencias no significativas en las capturas de machos de B. dorsalis silvestres en intervalos de 12 semanas entre trampas cebadas con una mecha que contiene 6 ml de metil eugenol líquido recién aplicado y trampas cebadas con una tapón polimérico u oblea que contenía una cantidad similar de metil eugenol. El contenido residual de metil eugenol también se midió para dispensadores sólidos durante el período de exposición a la intemperie, pero su atractivo duradero (≥ 12 semanas) impidió la identificación del nivel umbral del señuelo por debajo del cual los dispensadores sólidos eran ineficaces. Se discuten las implicaciones de estos hallazgos para los programas de trampeo.

Methyl eugenol

Bactrocera Dorsalis

10.1653/024.105.0307

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Citations (4)

Pericytes Are Odontoblast Progenitor Cells Depending on ER Stress

Journal of Dental Research (2025)

Takehito Ouchi Motonori Ando Rick Kurashima Masahiko Kimura Noriko Saito

Odontoblasts are terminally differentiated cells that exhibit mechanosensitivity and mineralization capacity. Mechanosensitive ion channels such as Piezo1 are present in odontoblasts and are associated with their physiological functions via Ca 2+ signaling. Both Ca 2+ signals via Ca 2+ influx from mechanosensitive ion channels and Ca 2+ release from Ca 2+ stores function as secondary messenger systems for various biological phenomena. The endoplasmic reticulum (ER) serves as an intracellular Ca 2+ store that mobilizes intracellular Ca 2+ . Changes in Ca 2+ concentration inside the ER are among the factors that cause ER stress. Perivascular cells are located around odontoblasts in the dental pulp. Although such formation indicates that perivascular cells interact with odontoblasts, their detailed profiles under developmental and pathological conditions remain unclear. In this study, we revealed that pericyte marker, neural/glial antigen 2 (NG2)–positive cells, in cell-rich zones (CZs) can differentiate into Piezo1-positive odontoblasts following genetic odontoblast depletion in mice, and modeled as odontoblast death after severe dentin injury and as reparative dentin formation. NG2-positive pericytes differentiated into odontoblasts faster than glial cells. To determine how NG2-positive cells differentiate into Piezo1-positive odontoblasts, we focused on the ER-stress sensor protein, activating transcription factor 6a (ATF6a). After genetic odontoblast depletion, NG2-positive cells regenerated in the odontoblast layer and were capable of acting as functional odontoblasts. In the presence of extracellular Ca 2+ , the application of a sarco/ER Ca 2+ -ATPase (SERCA) inhibitor, thapsigargin, known as an ER-stress inducer, increased the intracellular Ca 2+ concentration in the odontoblast lineage cells (OLCs). The increase was significantly inhibited by the application of a pharmacologic Piezo1 inhibitor, indicating that ER stress by SERCA inhibition augmented Piezo1-induced responses in odontoblast progenitor cells. However, the physiological activation of G q -coupled receptors by adenosine diphosphate did not induce Piezo1 activation. Gene silencing of ATF6a and/or NG2 impaired the mineralization of OLCs. Overall, ATF6a orchestrates the differentiation of NG2-positive pericytes into functional odontoblasts that act as sensory receptor cells and dentin-forming cells.

Piezo1

Thapsigargin

Cementoblast

10.1177/00220345241307944

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Field Capture of Male Oriental Fruit Flies (Diptera: Tephritidae) in Traps Baited with Solid Dispensers Containing Varying Amounts of Methyl Eugenol

Florida Entomologist (2021)

Todd E. Shelly Rick Kurashima Thomas Fezza

Detection of invasive populations of Bactrocera dorsalis relies on traps baited with the male-specific attractant methyl eugenol. Standard protocol involves applying 5 mL of liquid methyl eugenol (1% naled) to a cotton wick, which is then placed inside a Jackson trap. Because of the lure's high volatility, the lure is replaced every 6 wk. Prolonging the lure's longevity would increase trap servicing intervals and reduce associated costs. Conducted at 2 sites in Hawaii, the present study investigated the performance of weathered solid dispensers containing 3, 6, or 10 g of methyl eugenol, deployed with solid insecticidal strips, relative to freshly baited liquid-bearing cotton wicks. At the cooler site, the solid lure/toxicant combination captured as many males as the fresh liquid formulation for as long as 12 wk. At the warmer site, the solid lure/toxicant system had shorter longevity, apparently owing to the reduced effectiveness of the insecticidal strip over time.

Methyl eugenol

Toxicant

10.1653/024.103.00419

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Citations (8)

Field Capture of Male Mediterranean Fruit Flies (Diptera: Tephritidae) in Traps Baited with Varying Amounts of Trimedlure

Florida Entomologist (2020)

Todd E. Shelly Rick Kurashima

Detection of the Mediterranean fruit fly (medfly), Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), relies heavily on traps baited with the male attractant trimedlure. This lure is dispensed from solid polymeric plugs (2 g a.i.) that are changed out every 6 wk, because beyond this interval their attractiveness drops significantly below that of fresh lure. Existing data suggest that plugs loaded with 4 g of trimedlure may have longer attractancy, which would allow for longer servicing intervals with associated reductions in material and labor costs. The objective of the present study was to gather additional data on the effectiveness of plugs having trimedlure loadings greater than 2 g. In 4 field experiments conducted in Hawaii, the capture of male medflies was compared over 10 or 12 wk periods between control traps baited with 2 mL fresh liquid trimedlure on a cotton wick and treatment traps baited with aged plugs containing 2 to 4 g of the lure. In all experiments, 6-wk-aged plugs, regardless of the specific loading, attracted similar numbers of males as the fresh liquid lure. Conversely, in 3 of the 4 experiments, plugs aged for 10 or 12 wk attracted significantly fewer males than the fresh lure. The performance of plugs aged 8 wk was inconsistent, showing similar attractiveness as fresh lure in certain cases but not others. Based on these findings, we conclude that, counter to our expectations, the use of 4 g trimedlure plugs would not allow effective trapping over longer inter-servicing intervals.

Ceratitis capitata

10.1653/024.103.0403

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Citations (10)

Effects of Ascorbic Acid-Rich Bell Pepper on Development of Bactrocera latifrons (Diptera: Tephritidae)

Journal of Economic Entomology (1999)

Chiou Ling Chang Rick Kurashima

Journal Article Effects of Ascorbic Acid-Rich Bell Pepper on Development of Bactrocera latifrons (Diptera: Tephritidae) Get access Chiou Ling Chang, Chiou Ling Chang Tropical Fruit, Vegetable, and Ornamental Crop Research Laboratory, USDA-ARS, 2727 Woodlawn Drive, Honolulu, HI 96822 Search for other works by this author on: Oxford Academic PubMed Google Scholar Rick Kurashima Rick Kurashima Tropical Fruit, Vegetable, and Ornamental Crop Research Laboratory, USDA-ARS, 2727 Woodlawn Drive, Honolulu, HI 96822 Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Economic Entomology, Volume 92, Issue 5, 1 October 1999, Pages 1108–1112, https://doi.org/10.1093/jee/92.5.1108 Published: 01 October 1999

Ornamental plant

10.1093/jee/92.5.1108

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Citations (9)

Larval Development of <I>Ceratitis</I> c<I>apitata</I> (Diptera: Tephritidae) on a Meridic Diet

Annals of the Entomological Society of America (2001)

Chiou Ling Chang Rick Kurashima Christopher Albrecht

Journal Article Larval Development of Ceratitis capitata (Diptera: Tephritidae) on a Meridic Diet Get access Chiou Ling Chang, Chiou Ling Chang USDA–ARS, U. S. Pacific Basin Agricultural Research Center, 2727 Woodlawn Drive, Honolulu, HI 96822 Search for other works by this author on: Oxford Academic Google Scholar Rick Kurashima, Rick Kurashima USDA–ARS, U. S. Pacific Basin Agricultural Research Center, 2727 Woodlawn Drive, Honolulu, HI 96822 Search for other works by this author on: Oxford Academic Google Scholar Christopher P Albrecht Christopher P Albrecht USDA–ARS, U. S. Pacific Basin Agricultural Research Center, 2727 Woodlawn Drive, Honolulu, HI 96822 Search for other works by this author on: Oxford Academic Google Scholar Annals of the Entomological Society of America, Volume 94, Issue 3, 1 May 2001, Pages 433–437, https://doi.org/10.1603/0013-8746(2001)094[0433:LDOCCA]2.0.CO;2 Published: 01 May 2001 Article history Received: 25 September 2000 Published: 01 May 2001

Ceratitis capitata

Research center

10.1603/0013-8746(2001)094[0433:ldocca]2.0.co;2

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Citations (23)

Temporal control of gene expression from endogenous and exogenously-introduced DNAs in early embryogenesis of Xenopus laevis.

PubMed (1994)

K. Shiokawa Rick Kurashima Jun Shinga

We review here our studies on temporal control of the expression of genes in zygotic nucleus and of exogenously introduced genes in Xenopus embryos. For zygotic gene expression, our studies have revealed that mRNA synthesis, tRNA synthesis and rRNA synthesis initiates at the cleavage stage, MBT stage and late blastula stage, respectively. We also briefly summarize here results of the effects of weak bases on rDNA expression, nucleo-cytoplasmic transport and polysomal mobilization of newly-synthesized RNAs. For exogenously injected genes expression our data have shown the control of the expression by the promoter and configuration (circular or linear) of the injected DNAs but not necessarily by cellular changes that take place during the midblastula transition (MBT).

Blastula

Cleavage (geology)

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Citations (40)

Testing the Temporal Limits of Lures and Toxicants for Trapping Fruit Flies (Diptera: Tephritidae): Additional Weathering Studies of Solid Bactrocera and Zeugodacus Male Lures and Associated Insecticidal Strips

Todd E. Shelly Rick Kurashima David A. Dean Daniel Walega

Bactrocera

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Citations (4)

Wafers in Saddle Bags: A Novel Dispensing System for Male Lures Used to Detect Invasive Fruit Flies (Diptera: Tephritidae)

Todd E. Shelly Rick Kurashima Thomas Fezza Peter Cook Dylan Cook

Sterile Insect Technique

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Citations (2)

Field Capture of Male Melon Flies, Bactrocera cucurbitae (Coquillett), in Jackson Traps Baited with Cue-Lure Versus Raspberry Ketone Formate in Hawaii

Todd E. Shelly Rick Kurashima Jon I. Nishimoto

The melon fly, Bactrocera cucurbitae (Coquillett), is an invasive worldwide pest of vegetables, particularly various species of squashes and melons. Because it poses a serious economic threat, many countries operate continuous trapping programs to detect incipient infestations. Detection currently relies on traps baited with a chemical (cue-lure, CL) that is attractive to males of this species. Earlier research suggested that a chemically similar compound (raspberry ketone formate, RKF) is more attractive than CL and thus might improve surveillance efforts. The present study describes the results of field experiments in Hawaii that compare captures of B. cucurbitae males in traps baited with (1) CL liquid versus a solid formulation (so-called plugs) of RKF or (2) CL liquid versus RKF liquid. In the first experiment, the traps with CL liquid captured more males than traps baited with RKF plugs in three of the four study sites, with no difference observed between lures at the remaining area. In the second experiment, the traps baited with CL liquid captured more males than traps baited with RKF liquid at two of the four study areas, with no difference observed between lures at the remaining two sites. The discrepancy between earlier studies and the present one highlights the need for additional field testing of RKF to assess its value as a replacement for CL.

Bactrocera

Melon

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Citations (5)