Publications by authors named "Sakakura Y"

Marine organisms' lipid metabolism contributes to marine ecosystems by producing a variety of lipid molecules. Historically, research focused on the lipid metabolism of the organisms themselves. Recent microbiome studies, however, have revealed that gut microbial communities influence the amount and type of lipids absorbed by organisms, thereby altering the organism's lipid metabolism.

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Tetrodotoxin (TTX) is a potent neurotoxin that accumulates in Takifugu rubripes, commonly known as pufferfish, through the ingestion of TTX-bearing organisms as part of their food chain. Although researchers believe that pufferfish use TTX to relieve stress, data are not currently available on how TTX affects the gut microbiota of pufferfish. To address this gap, our study aimed to investigate whether administering TTX to fish could alter their gut microbiota and overall health under various salinity conditions, including 30.

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Background: Liquid embolization in neuroendovascular procedures carries the risk of embolizing an inappropriate vessel. Operators must pay close attention to multiple vessels during the procedure to avoid ischemic complications. We report our experience with real time artificial intelligence (AI) assisted liquid embolization and evaluate its performance.

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In this study, we investigated the acute toxicity, in vivo effects, oxidative stress, and gene expression changes caused by hypoxia on the brackish water flea Diaphanosoma celebensis. The no-observed-effect concentration (NOEC) of 48 h of hypoxia exposure was found to be 2 mg/L O. Chronic exposure to NOEC caused a significant decline in lifespan but had no effect on total fecundity.

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Article Synopsis
  • Neuroendovascular procedures require careful monitoring to prevent complications from unintended device movements, and AI advancements now allow for real-time notifications about these movements.
  • In a study involving nine patients, a real-time AI software was used during coil embolization to provide notifications for key device actions, with promising results in terms of accuracy and safety.
  • The AI system showed high precision and recall in detecting device movements, effectively aiding in the procedure without any reported adverse events, indicating its potential for future use in neuroendovascular therapies.
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Pufferfish saxitoxin- and tetrodotoxin (TTX)-binding protein (PSTBP) is considered to transfer TTX between tissues. The immunohistochemical distribution of PSTBP-homolog (PSTBPh) and TTX in the brain and pituitary of hatchery-reared juvenile tiger puffer Takifugu rubripes was investigated. PSTBPh was observed mainly in the pars intermedia of the pituitary.

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Here, we investigate the effects of acute and chronic exposure to arsenate (AsV) and arsenite (AsIII) in the marine medaka Oryzias melastigma. In vivo effects, biotransformation, and oxidative stress were studied in marine medaka exposed to the two inorganic arsenics for 4 or 28 days. An investigation of embryonic development revealed no effect on in vivo parameters, but the hatching rate increased in the group exposed to AsIII.

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Background: Neurointerventionalists must pay close attention to multiple devices on multiple screens simultaneously, which can lead to oversights and complications. Artificial intelligence (AI) has potential application in recognizing and monitoring these devices on fluoroscopic imaging.

Methods: We report out preliminary experience with a real time AI assistance software, Neuro-Vascular Assist (iMed technologies, Tokyo, Japan), in six patients who underwent carotid artery stenting.

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This article detailly describes the subtemporal-transtentorial STA-SCA bypass technique. Through temporal base drilling, copious cerebrospinal fluid evacuation before retraction, and sufficient retraction of the temporal lobe preserving the veins of the temporal base would be primodial to obtain an appropriate surgical field. Refrection of the tentrial free edge and identification of recipient SCA posterior to the entry point of the trochlear nerve into the cavernous sinus is a micro-anatomical key.

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Background: Washing with water is not inferior to washing with soaps and detergents in children with atopic dermatitis (AD) in remission during the fall-winter seasons. We investigated whether this finding varies during summer based on the type of cleanser (soaps and detergents).

Methods: This evaluator-blinded, pragmatic, randomized, and non-inferiority study enrolled patients with AD whose eczema was controlled following regular steroid ointment application 2 days/week.

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We examined neuronal responses of hypothalamic melanin-concentrating hormone (MCH) and corticotropin-releasing hormone (CRH) to background color in the self-fertilizing fish, Kryptolebias marmoratus. Fish were individually reared in lidless white or black cylindrical plastic containers for 15 days. The number of MCH-immunoreactive (ir) cell bodies in the nucleus lateralis tuberis (NLT) of the hypothalamus was significantly greater in the white-acclimated fish, while no significant differences were observed in the nucleus anterior tuberis (NAT) of the hypothalamus.

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Article Synopsis
  • Epidermal growth factor receptor (EGFR)-mutated squamous cell carcinoma (SCC) is rare compared to adenocarcinoma, and the effectiveness of osimertinib, a treatment known to work for adenocarcinoma, is uncertain for SCC.
  • An 83-year-old male with EGFR exon19 deletion SCC treated with osimertinib experienced disease progression after 18 days, leading to his death three weeks later.
  • Autopsy and next-generation sequencing indicated the presence of other genetic mutations (TP53 R158L, CDK6, and KRAS amplifications), suggesting these could explain osimertinib's failure in his case.
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We have previously detected tetrodotoxin (TTX) in the brain of the wild toxic torafugu Takifugu rubripes by immunohistochemistry and LC/MS analysis. We have also indicated that TTX is a stress-relieving substance in the brain and reduces agonistic interactions in torafugu juveniles. Although the toxicity of marine pufferfish in the Japanese waters has been extensively examined for food hygiene, whether wild toxic pufferfish generally possess TTX in the brain has not been investigated.

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Reports on the efficacy of second-line treatment with cytotoxic agents after treatment with immune checkpoint inhibitors are limited. Here, we retrospectively evaluated patients in the real-world clinical practice treated with docetaxel or docetaxel plus ramucirumab. Ninety-three patients treated with docetaxel or docetaxel plus ramucirumab as a second- or later-line therapy were included.

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: Vasopressors are used for treating maternal hypotension. However, the appropriate administration method and effects on newborns have not been reported. We evaluated maternal blood pressure fluctuation and neonatal findings in patients who received continuous vasopressor administration during elective cesarean sections and those who received bolus vasopressor administration upon onset of hypotension.

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Iron (Fe), a trace metal in coastal waters has increased significantly due to anthropogenic activities, however, few studies have examined its toxicity to marine organism reproduction and associated mechanisms. We employed two marine rotifers, the temperate Brachionus plicatilis, and tropical B. rotundiformis to investigate the toxicity of iron (FeSO•7HO) and its deleterious effects on reproductive features in females (sexual fecundity, abnormal resting eggs, and swimming speed) and males (lifespan, swimming speed, and spermatozoa quality) under lethal and sub-lethal exposure.

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Objective: Subarachnoid hemorrhage due to vertebral artery dissection is often fatal; however, its anatomical predictors remain unclear. We conducted a retrospective hospital-based case-control study to evaluate whether variations in the posterior communicating artery are associated with the risk of vertebral artery dissection with subarachnoid hemorrhage.

Materials And Methods: We obtained data from patients who underwent computed tomography angiography at our hospital between April 2010 and March 2020.

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We tested whether crowding stress affects the hypothalamo-pituitary-interrenal (HPI) axis of the self-fertilizing fish, Kryptolebias marmoratus, which is known to be aggressive in the laboratory conditions but sometimes found as a group from a single land crab burrow in the wild. The projection of corticotropin-releasing hormone (CRH) neurons to the adrenocorticotropic hormone (ACTH) cells in the pituitary was confirmed by dual-label immunohistochemistry; CRH-immunoreactive (ir) fibers originating from cell bodies located in the lateral tuberal nucleus (NLT) of the hypothalamus were observed to project to ACTH-ir cells in the rostral pars distalis of the pituitary. Then, fish were reared solitary or in pairs for 14 days, and the number of CRH-ir cell bodies in the NLT of the hypothalamus and cortisol levels in the body without head region were compared.

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Article Synopsis
  • - Allergic bronchopulmonary aspergillosis (ABPA) is an allergic reaction that makes bronchial asthma worse, and dupilumab has shown potential to reduce the need for glucocorticoids in patients with this condition.
  • - A 54-year-old woman diagnosed with ABPA experienced multiple asthma exacerbations and underwent glucocorticoid treatment, alongside itraconazole, but eventually transitioned to treatment with dupilumab.
  • - Remarkably, this case reports the first instance where a patient with ABPA was able to completely stop using glucocorticoids after starting dupilumab treatment.
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Chylothorax is a potentially fatal postoperative complication of neck, thoracic, and abdominal surgery in children. We report the case of a 3-month-old infant who developed persistent chylothorax with respiratory insufficiency successfully managed using a microsurgical technique and intraoperative embolotherapy. This was achieved using a combination of intermittent digital X rays and live near-infrared fluorescence imaging we have termed "dual imaging lymphangiography" to guide therapy in real time.

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Two euryhaline rotifers, the temperate species Brachionus plicatilis and tropical species Brachionus rotundiformis, were used to investigate the effects of iron (FeSO·7HO), an essential trace metal, on reproductive patterns and lifetables, including the metabolism of lipid and reactive oxygen species (ROS). B. plicatilis was more sensitive to iron with regard to sexual reproduction.

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  • In larviculture, rotifers are crucial as an initial food source for fish larvae, but their size and density must be managed properly to prevent mortality and developmental issues.
  • The study applied carbon and argon heavy-ion-beam irradiation to create rotifer mutants with larger sizes, assessing factors like lethality and growth rates.
  • Three promising rotifer mutants, TYC78, TYC176, and TYA41, demonstrated larger sizes and active population growth, indicating their potential as a solution for improving live feed in fish larviculture.
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  • The study investigates the effectiveness of second-line treatments for non-small cell lung cancer (NSCLC) patients with T790M-negative mutations or unknown causes of resistance after initial tyrosine kinase inhibitor (TKI) therapy.
  • A total of 39 patients were treated with either chemotherapy (28 patients) or second-generation TKIs (11 patients) after the first-line therapy, with median progression-free survival (PFS) and overall survival (OS) measured for both groups.
  • Results indicate no significant differences in PFS (5.4 months for chemotherapy vs. 3.4 months for TKIs) or OS (16.1 months for chemotherapy vs. 12.8 months for TKIs), suggesting that TKIs
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Calcification in lung nodules usually indicates a benign lesion. Here, we report the case of a 59-year-old male patient with a well defined 30 mm calcified nodule in his right upper lung lobe and calcified mediastinal lymph nodes. The mass was diagnosed as adenocarcinoma by transbronchial biopsy.

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