Publications by authors named "Hitomi Hayashi"

Article Synopsis
  • The study investigates the link between high-frequency oscillations (HFOs) captured in EEG and the clinical progression of Panayiotopoulos syndrome (PS) in children to see if HFOs can indicate seizure activity.
  • Out of 18 analyzed children, 72.2% showed HFOs, and those with HFOs experienced longer seizure activity and were often resistant to treatment.
  • The findings suggest that HFOs could serve as a biomarker for epilepsy and indicate when to reduce medication, as seizures were absent when HFOs were not present despite other EEG spikes.
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Background: The exploration of diet and nutrition as they relate to mental health and psychiatric disorders is a developing field. Anxiety, depression, and pharmacological treatments used to treat these disorders are likely to have side effects that induce decreases in activity and irregular eating habits, resulting in persistent nutritional imbalance. Unhealthy dietary patterns are associated with an increased risk of developing physical and mental health conditions.

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  • The US FDA has mandated the use of the Standard for Exchange of Nonclinical Data (SEND) for pharmaceutical companies developing new drugs in the US market.
  • The Japan Pharmaceutical Manufacturers Association (JPMA) initiated a project to analyze SEND datasets specifically for toxicology studies, uncovering variations in how data is populated.
  • The Taskforce Team recommends minimizing these variations in both SEND datasets and study protocols to improve data quality, making it easier for regulatory agencies to review and enhancing the overall efficiency of new drug development.
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The synergistic epidemics of substance use, violence, and HIV/AIDS, also known as the SAVA syndemic, disproportionately affects vulnerable women in the United States. Methamphetamine use is closely linked with physical and sexual violence, including intimate partner violence (IPV), which heightens women's vulnerability to HIV. This mixed methods study examined the prevalence and correlates of violence among women who use methamphetamine, ( = 209) enrolled in an HIV intervention study in San Diego, California.

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Coffin-Siris syndrome (CSS) is a congenital anomaly syndrome characterized by developmental delay, coarse facial features, and hypoplasia of the fifth digit's nail or phalanges. Herein, we report a case of the 8-year-old female patient who showed developmental delay associated with dysplasia in the macular and large toe area. Comprehensive genomic analysis showed no possible candidate variants, but the subsequent genomic copy number analysis revealed a novel exonic deletion in the coding region of AT-rich interactive domain-containing protein 1B (ARID1B), a gene responsible for CSS.

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Methamphetamine use, sexual relationship power (SRP), and partner violence (PV) are associated with increased risk of sexually transmitted infections (STIs) among women. The objective of our study was to examine the association of recent PV and SRP on STIs by partner type among HIV-negative, heterosexual women who use methamphetamine in San Diego, CA. Using baseline survey data from 209 women enrolled in FASTLANE II, an HIV behavioral intervention trial, we conducted logistic regression analyses to examine associations between PV, SRP, and self-reported lifetime STIs (e.

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Aim: Tacrolimus (TAC) is an important drug for inflammatory diseases. However, TAC has several limitations, such as variable trough concentrations among individuals and a high medication frequency. In this study, we created NK61060, a novel micellar TAC formulation, to circumvent these disadvantages.

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Article Synopsis
  • Previous studies indicated that NK105, a paclitaxel-loaded nanoparticle, exhibits stronger anti-tumor properties and less nerve damage compared to traditional delivery methods.
  • Pharmacokinetic analysis revealed that NK105 resulted in lower concentrations of paclitaxel in the dorsal root ganglion (DRG), which is linked to reduced peripheral neurotoxicity.
  • Size differences in delivery particles were key; smaller particles like the ones in PTX/CRE could enter the DRG, while the larger NK105 particles could not, limiting nerve exposure to the drug.
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Article Synopsis
  • The SAVA syndemic model illustrates how substance abuse, violence, and HIV risk combine to disproportionately affect certain populations, particularly among methamphetamine users.
  • A study involving 230 participants (108 men and 122 women) revealed high rates of intimate partner violence (IPV), with women experiencing slightly higher rates than men for both physical and sexual IPV.
  • Key findings indicated that lower social support and higher engagement in risky sexual behaviors while using meth were significant risk factors for IPV, suggesting the need for gender-specific interventions addressing these issues within the broader context of the SAVA syndemic.
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In the United States, intimate partner violence (IPV) against women disproportionately affects ethnic minorities. Further, disparities related to socioeconomic and foreign-born status impact the adverse physical and mental health outcomes as a result of IPV, further exacerbating these health consequences. This article reviews 36 U.

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  • The study investigated how ATP affects calcium ion responses in neurons and satellite cells from the nodose ganglion, focusing on the interactions between these cells.
  • ATP caused increases in intracellular calcium levels in both neurons and satellite cells, with specific receptor agonists and antagonists influencing these responses.
  • GABA was found to modulate the calcium responses in neurons, indicating that satellite cells may play a role in regulating neuronal excitability in the nodose ganglion.
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Recent studies have shown that epigenetic alterations correlate with carcinogenesis in various tissues. Identification of these alterations might help characterize the early stages of carcinogenesis. We comprehensively analyzed DNA methylation and gene expression in livers obtained from rats exposed to nitrosodiethylamine (DEN) followed by a promoter of hepatic carcinogenesis, phenobarbital (PB).

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We previously reported a toxicogenomics-based prediction model for hepatocarcinogens in which the expression patterns of signature genes following repeated doses of either genotoxic or non genotoxic compounds were similar. Based on the results of our prediction model, we hypothesized that repeated doses of non-genotoxic carcinogens might have initiating potential. Here, we conducted a two stage hepatocarcinogenesis study in rats exposed to the initiating agent nitrosodiethylamine (DEN), and hepatotoxic compounds thioacetamide (TAA), methapyrilene (MP) and acetaminophen (APAP) for 1-2 weeks followed by the liver tumor promoter phenobarbital (PB).

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Indole-3-carbinol (I3C) and phenobarbital (PB) are cytochrome P450 (CYP) 1A and CYP2B inducers, respectively, and have liver tumor-promoting effects in rats. In this study, we investigated the modifying effects on tumor promotion by I3C and PB co-administration. Six-week-old male F344 rats received a single intraperitoneal injection of N-diethylnitrosamine for initiation treatment.

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Hydrogen sulfide (H2S), a gasotransmitter, plays a variety of roles in the mammalian body including the cardiovascular system. Given evidence that H2S donors including NaHS inhibit human platelet aggregation, we examined and characterized the effects of NaHS on rabbit platelet aggregation and cytosolic Ca(2+) mobilization. Rabbit platelet aggregation was determined in platelet-rich plasma (PRP) and washed platelets.

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We have previously reported that hepatocarcinogens increase liver cells expressing p21(Cip1), a G1 checkpoint protein and M phase proteins after 28-day treatment in rats. This study aimed to identify early prediction markers of carcinogens available in many target organs after 28-day treatment in rats. Immunohistochemical analysis was performed on Ki-67, p21(Cip1) and M phase proteins [nuclear Cdc2, phospho-Histone H3 (p-Histone H3), Aurora B and heterochromatin protein 1α (HP1α)] with carcinogens targeting different organs.

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  • The study aimed to investigate the toxicity of citrinin (CTN) on kidneys and female reproductive organs in female BALB/c mice over repeated oral doses for 90 days.
  • Initial results from a 70-day study at doses of 1.25 and 7.5 ppm showed no significant toxicity, except a slight increase in ovary weight.
  • A follow-up 90-day study at higher doses of 15 and 30 ppm revealed no major toxicity, but an increase in ovary weights and large follicles at 15 ppm was observed, establishing this as the lowest-observable-adverse-effect level.
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We have previously reported that renal carcinogens examined in rats increase tubular cell proliferation and topoisomerase (Topo) IIα(+) cells. The present study was aimed at identifying early prediction markers of carcinogens after 28-day treatment in rats. Following gene expression screening by microarrays in renal tubules with renal carcinogens, immunohistochemical analysis and TUNEL-assay were performed with carcinogens targeting different organs.

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Objective: We assessed whether disease activity was associated with dietary habits, nutritional status, adipokines, and oxidative stress in patients with rheumatoid arthritis.

Methods: The subjects were 37 patients with RA. The assessment of the nutritional status included anthropometric and biochemical parameters.

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Omeprazole (OPZ) and β-naphthoflavone (BNF) are cytochrome P450 (CYP)1A inducers and have liver tumor promoting effects. In this study, we investigated the co-promoting and co-initiating effects of OPZ and BNF in rats. In Experiment 1, male rats were subjected to partial hepatectomy (PH), and given oral doses of 138 or 276 mg/kg OPZ, 0.

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Activators of tissue proteolysis including Stachybotrys microspora triprenyl phenol (SMTP)-7 are a new class of agents that are expected to be effective for amelioration of chronic tissue destructive diseases. The present study was performed to examine whether SMTP-7 is effective for the amelioration or protection of early-stage IgA nephropathy (IgAN) induced by nivalenol (NIV) in female BALB/c mice. In Experiment 1, mice were administered NIV at 24 ppm in diet for 8 weeks, and during the NIV treatment, they were intraperitoneally injected with SMTP-7 (10 mg/kg) three times a week.

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To determine the threshold dose of β-Naphthoflavone (BNF) that induces hepatocellular tumor promoting effects, reactive oxygen species (ROS) generation and thiobarbituric acid-reactive substance (TBARS) formation, and drug-metabolizing enzymes that protect against ROS generation, two-stage liver carcinogenesis model was used. Partial hepatectomized rats (n = 11 to 12) were fed diets containing 0, 0.03, 0.

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Omeprazole (OPZ), a proton pump inhibitor, is a cytochrome P450 (CYP) 1A1/2 inducer. Some CYP1A inducers are known to have liver tumor promoting effects in rats and the ability to enhance oxidative stress. In this study, we performed a two-stage liver carcinogenesis bioassay in rats to examine the tumor promoting effect of OPZ (Experiment 1) and to clarify a possible mechanism of action (Experiment 2).

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Some renal carcinogens can induce karyomegaly, which reflects aberrant cell division in the renal tubules, from the early stages of exposure. To clarify the cell cycle-related changes during the early stages of renal carcinogenesis, we performed immunohistochemical analysis of tubular cells in male F344 rats treated with carcinogenic doses of representative renal carcinogens for 28 days. For this purpose, the karyomegaly-inducing carcinogens ochratoxin A (OTA), ferric nitrilotriacetic acid, and monuron, and the non-karyomegaly-inducing carcinogens tris(2-chloroethyl) phosphate and potassium bromate were examined.

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Indole-3-carbinol (I3C) has a liver tumor promoting activity in rats, and is also known as a cytochrome p450 1A (CYP1A) inducer. The generation of reactive oxygen species (ROS) resulting from CYP1A induction due to I3C, is probably involved in the tumor promotion. To clarify whether ROS generation contributes to I3C's induction of hepatocellular altered foci, partially hepatectomized rats were fed a diet containing 0.

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