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  1. Artikel ; Online: Comprehensive analysis of male-free reproduction in Monomorium triviale (Formicidae: Myrmicinae).

    Idogawa, Naoto / Sasaki, Tomonori / Tsuji, Kazuki / Dobata, Shigeto

    PloS one

    2021  Band 16, Heft 4, Seite(n) e0246710

    Abstract: We report comprehensive evidence for obligatory thelytokous parthenogenesis in an ant Monomorium triviale. This species is characterized by distinct queen-worker dimorphism with strict reproductive division of labor: queens produce both workers and new ... ...

    Abstract We report comprehensive evidence for obligatory thelytokous parthenogenesis in an ant Monomorium triviale. This species is characterized by distinct queen-worker dimorphism with strict reproductive division of labor: queens produce both workers and new queens without mating, whereas workers are completely sterile. We collected 333 nests of this species from 14 localities and three laboratory-reared populations in Japan. All wild queens dissected had no sperm in their spermathecae. Laboratory observation confirmed that virgin queens produced workers without mating. Furthermore, microsatellite genotyping showed identical heterozygous genotypes between mothers and their respective daughters, suggesting an extremely low probability of sexual reproduction. Microbial analysis detected no bacterial genera that are known to induce thelytokous parthenogenesis in Hymenoptera. Finally, the lack of variation in partial sequences of mitochondrial DNA among individuals sampled from across Japan suggests recent rapid spread or selective sweep. M. triviale would be a promising model system of superorganism-like adaptation through comparative analysis with well-studied sexual congeners, including the pharaoh ant M. pharaonis.
    Mesh-Begriff(e) Animals ; Ants/genetics ; Ants/physiology ; DNA, Mitochondrial/genetics ; Female ; Male ; Microsatellite Repeats ; Parthenogenesis ; Reproduction
    Chemische Substanzen DNA, Mitochondrial
    Sprache Englisch
    Erscheinungsdatum 2021-04-29
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0246710
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Route of pesticide spread on the body surface of Blattella germanica (Linnaeus): a NanoSuit-energy dispersive X-ray spectroscopy analysis.

    Takaku, Yasuharu / Shiraki, Katsumi / Suzuki, Chiaki / Takehara, Sayuri / Nishii, Hiroyuki / Sasaki, Tomonori / Hariyama, Takahiko

    Scientific reports

    2023  Band 13, Heft 1, Seite(n) 14335

    Abstract: Numerous studies have focussed on the mechanisms of entry of pesticides into insect body parts such as oral intake, penetration through the integument of the body wall, and inhalation through spiracles. However, little is known about how insecticides ... ...

    Abstract Numerous studies have focussed on the mechanisms of entry of pesticides into insect body parts such as oral intake, penetration through the integument of the body wall, and inhalation through spiracles. However, little is known about how insecticides spread to the points of entry or the paths on the body surface that are used to reach the target sites. In this study, elemental signals of pesticide-mimicking test solutions were tracked and their routes of spreading in experimental insects (Blattella germanica L.) were investigated using NanoSuit (a method of surface modification) and energy dispersive X-ray spectroscopy, combined with high-resolution scanning electron microscopy. When the test solution initially adhered to the dorsal and/or ventral body surface, it tended to spread horizontally to reach lateral plates. Whereas, when the solution directly adhered to the anterior side of the lateral plates, it spread to posterior segments. In this case, however, spreading in the opposite direction (i.e., the solution directly adhered to the posterior side of the lateral plates) was interrupted at a boundary erected by different groups of fine structures; each protrusion was large, and the arrangement was rather dense in the posterior segments. Morphological features of these fine structures and chemical characteristics of the hydrophobic surface substances potentially regulate the strength of the capillary force, which determines pesticide spreading.
    Mesh-Begriff(e) Animals ; Pesticides ; Insecticides ; Blattellidae ; Integumentary System ; Microscopy, Electron, Scanning
    Chemische Substanzen Pesticides ; Insecticides
    Sprache Englisch
    Erscheinungsdatum 2023-08-31
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-41474-x
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Connexin 45 is a novel suppressor of melanoma metastasis.

    Saito, Mikako / Tokunaga, Naruwa / Saito, Toshiki / Hatakenaka, Tomohiro / Sasaki, Tomonori / Matsuki, Nahoko / Minagawa, Seiya

    Cytotechnology

    2022  Band 75, Heft 2, Seite(n) 103–113

    Abstract: The expression spectra of connexin (Cx) isoforms were investigated in three mouse melanoma cell lines: B16-F1 (F1), B16-F10 (F10), and B16-BL6 (BL6). Metastatic potential intensity was higher in the order of F1, F10, and BL6. A remarkable behavior of : ...

    Abstract The expression spectra of connexin (Cx) isoforms were investigated in three mouse melanoma cell lines: B16-F1 (F1), B16-F10 (F10), and B16-BL6 (BL6). Metastatic potential intensity was higher in the order of F1, F10, and BL6. A remarkable behavior of
    Supplementary information: The online version contains supplementary material available at 10.1007/s10616-022-00563-x.
    Sprache Englisch
    Erscheinungsdatum 2022-12-17
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1035772-5
    ISSN 0920-9069
    ISSN 0920-9069
    DOI 10.1007/s10616-022-00563-x
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Effects of Tissue Flossing and Dynamic Stretching on Hamstring Muscles Function

    Hiroaki Kaneda, Naonobu Takahira, Kouji Tsuda, Kiyoshi Tozaki, Sho Kudo, Yoshiki Takahashi, Shuichi Sasaki, Tomonori Kenmoku

    Journal of Sports Science and Medicine, Vol 19, Iss 4, Pp 681-

    2020  Band 689

    Abstract: Tissue flossing aims to improve range of motion (ROM), reduce pain, and enhance injury prevention. However, evidence is lacking regarding its effects. Therefore, this study examined the effects of flossing on hamstring muscles function in comparison to ... ...

    Abstract Tissue flossing aims to improve range of motion (ROM), reduce pain, and enhance injury prevention. However, evidence is lacking regarding its effects. Therefore, this study examined the effects of flossing on hamstring muscles function in comparison to dynamic stretching (DS). Seventeen healthy young men ([mean ± SD] age, 23.2 ± 1.1 years; height, 1.72 ± 0.08 m; body mass, 63.5 ± 9.3 kg) volunteered as subjects in this randomized crossover trial. The subjects received flossing, DS, and control interventions in random order at least 1 week apart to eliminate the influence of the previous intervention. Flossing involved passive twisting and active movement using a floss band (Sanctband COMPRE Floss Blueberry, Sanct Japan Co., Ltd.). DS was performed for 4 minutes in 30-second sets consisting of 15 repetitions of 2 seconds stretching. The following were measured before and after each intervention: straight leg raise (SLR) test, passive knee extension (KE) test, passive torque, passive stiffness, fascicle length in the biceps femoris long head as an indication of hamstring muscles flexibility, and maximal isometric knee flexion contraction, maximal eccentric knee extension/flexion contraction, rate of force development, and muscle activity. Flossing yielded significant improvements in the SLR test (mean difference in post-intervention changes between interventions: 5.4°, percentage change from pre- to post-value: 13.4%, p = 0.004), passive KE test (6.2°, 4.5%, p < 0.001), passive torque at end-ROM (3.8 Nm, 4.7%, p = 0.03), and maximal eccentric knee flexion contraction (14.9% body weight, 8.2%, p = 0.03) than control. Moreover, flossing yielded 2.1-fold greater improvements in the passive KE test (3.8°, 4.5%, p = 0.03) and yielded significant improvements in the maximal eccentric knee extension contraction (29.9% body weight, 13.8%, p = 0.02) than DS. Therefore, flossing on hamstring muscles is more beneficial than DS with respect to increasing ROM and muscle exertion.
    Schlagwörter floss band ; fascia ; compression ; range of motion ; flexibility ; injury prevention ; Sports ; GV557-1198.995 ; Sports medicine ; RC1200-1245
    Thema/Rubrik (Code) 796
    Sprache Englisch
    Erscheinungsdatum 2020-12-01T00:00:00Z
    Verlag University of Uludag
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  5. Artikel ; Online: High-throughput genotyping of a full voltage-gated sodium channel gene via genomic DNA using target capture sequencing and analytical pipeline MoNaS to discover novel insecticide resistance mutations.

    Itokawa, Kentaro / Sekizuka, Tsuyoshi / Maekawa, Yoshihide / Yatsu, Koji / Komagata, Osamu / Sugiura, Masaaki / Sasaki, Tomonori / Tomita, Takashi / Kuroda, Makoto / Sawabe, Kyoko / Kasai, Shinji

    PLoS neglected tropical diseases

    2019  Band 13, Heft 11, Seite(n) e0007818

    Abstract: In insects, the voltage-gated sodium channel (VGSC) is the primary target site of pyrethroid insecticides. Various amino acid substitutions in the VGSC protein, which are selected under insecticide pressure, are known to confer insecticide resistance. In ...

    Abstract In insects, the voltage-gated sodium channel (VGSC) is the primary target site of pyrethroid insecticides. Various amino acid substitutions in the VGSC protein, which are selected under insecticide pressure, are known to confer insecticide resistance. In the genome, the VGSC gene consists of more than 30 exons sparsely distributed across a large genomic region, which often exceeds 100 kbp. Due to this complex genomic structure, it is often challenging to genotype full coding nucleotide sequences (CDSs) of VGSC from individual genomic DNA (gDNA). In this study, we designed biotinylated oligonucleotide probes from CDSs of VGSC of Asian tiger mosquito, Aedes albopictus. The probe set effectively concentrated (>80,000-fold) all targeted regions of gene VGSC from pooled barcoded Illumina libraries each constructed from individual A. albopictus gDNAs. The probe set also captured all orthologous VGSC CDSs, except some tiny exons, from the gDNA of other Culicinae mosquitos, A. aegypti and Culex pipiens complex, with comparable efficiency as a result of the high nucleotide-level conservation of VGSC. To improve efficiency of the downstream bioinformatic process, we developed an automated pipeline-MoNaS (Mosquito Na+ channel mutation Search)-which calls amino acid substitutions in the VGSC from NGS reads and compares those to known resistance mutations. The proposed method and our bioinformatic tool should facilitate the discovery of novel amino acid variants conferring insecticide resistance on VGSC and population genetic studies on resistance alleles (with respect to the origin, selection, and migration etc.) in both clinically and agriculturally important insect pests.
    Mesh-Begriff(e) Aedes/genetics ; Alleles ; Animals ; Culex/genetics ; DNA/metabolism ; Exons ; Genomics ; Genotype ; Insecticide Resistance/genetics ; Mutation ; Pyrethrins/pharmacology ; Sodium/metabolism ; Voltage-Gated Sodium Channels/genetics
    Chemische Substanzen Pyrethrins ; Voltage-Gated Sodium Channels ; DNA (9007-49-2) ; Sodium (9NEZ333N27)
    Sprache Englisch
    Erscheinungsdatum 2019-11-18
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2429704-5
    ISSN 1935-2735 ; 1935-2735
    ISSN (online) 1935-2735
    ISSN 1935-2735
    DOI 10.1371/journal.pntd.0007818
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Cheater genotypes in the parthenogenetic ant Pristomyrmex punctatus.

    Dobata, Shigeto / Sasaki, Tomonori / Mori, Hideaki / Hasegawa, Eisuke / Shimada, Masakazu / Tsuji, Kazuki

    Proceedings. Biological sciences

    2008  Band 276, Heft 1656, Seite(n) 567–574

    Abstract: Cooperation is subject to cheating strategies that exploit the benefits of cooperation without paying the fair costs, and it has been a major goal of evolutionary biology to explain the origin and maintenance of cooperation against such cheaters. Here, ... ...

    Abstract Cooperation is subject to cheating strategies that exploit the benefits of cooperation without paying the fair costs, and it has been a major goal of evolutionary biology to explain the origin and maintenance of cooperation against such cheaters. Here, we report that cheater genotypes indeed coexist in field colonies of a social insect, the parthenogenetic ant Pristomyrmex punctatus. The life history of this species is exceptional, in that there is no reproductive division of labour: all females fulfil both reproduction and cooperative tasks. Previous studies reported sporadic occurrence of larger individuals when compared with their nest-mates. These larger ants lay more eggs and hardly take part in cooperative tasks, resulting in lower fitness of the whole colony. Population genetic analysis showed that at least some of these large-bodied individuals form a genetically distinct lineage, isolated from cooperators by parthenogenesis. A phylogenetic study confirmed that this cheater lineage originated intraspecifically. Coexistence of cheaters and cooperators in this species provides a good model system to investigate the evolution of cooperation in nature.
    Mesh-Begriff(e) Animals ; Ants/genetics ; Ants/physiology ; Biological Evolution ; Genotype ; Parthenogenesis/genetics
    Sprache Englisch
    Erscheinungsdatum 2008-10-14
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209242-6
    ISSN 1471-2954 ; 0962-8452 ; 0080-4649 ; 0950-1193
    ISSN (online) 1471-2954
    ISSN 0962-8452 ; 0080-4649 ; 0950-1193
    DOI 10.1098/rspb.2008.1215
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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