Publications by authors named "Daisuke Nishizawa"

Article Synopsis
  • The study explores how dietary habits may influence the prevention and management of schizophrenia (SCZ) and bipolar disorder (BD) in older adults, particularly in relation to genetic predispositions and lifestyle-related diseases.
  • A cohort of 730 older patients was assessed for their dietary habits across various food categories while calculating polygenic risk scores (PRSs) for SCZ and BD based on large-scale genetic studies.
  • Findings indicated that higher genetic risk for SCZ and BD is correlated with lower consumption of nutrient-rich foods like light-colored vegetables and soybeans, with notable differences in dietary impacts between types of BD, especially BD I.
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Midazolam is widely used for intravenous sedation. However, wide interindividual variability is seen in the sensitivity to midazolam. The association between genetic factors and interindividual differences in midazolam sensitivity remains unclear.

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Optical trapping is an effective tool for manipulating micrometer-sized particles, although its application to nanometer-sized particles remains difficult. The field of optical trapping has advanced significantly, incorporating more advanced techniques such as plasmonic structures. However, single-molecule trapping remains a challenge.

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Opioids are almost mandatorily used for analgesia for cancer pain and postoperative pain. Opioid analgesics commonly induce nausea as a side effect. However, the genetic factors involved are still mostly unknown.

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Electron dynamics of the Na10 chain and the Na10-N2 complex locally excited by an atomistic optical near-field are investigated using real-time time-dependent density functional theory calculations on real-space grids. Ultrafast laser pulses were used to simulate the near-field excitation under on- and off-resonance conditions. Off-resonance excitation did not lead to the propagation of the excitation through the Na10 chain.

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Aim: Abundant data are available on the effect of the A118G (rs1799971) single-nucleotide polymorphism (SNP) of the μ-opioid receptor OPRM1 gene on morphine and fentanyl requirements for pain control. However, data on the effect of this SNP on intraoperative remifentanil requirements remain limited. We investigated the effect of this SNP on intraoperative remifentanil requirements.

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Phantom tooth pain (PTP) is one type of non-odontogenic neuropathic toothache, which rarely occurs after appropriate pulpectomy or tooth extraction. The cause of PTP is unknown. We investigated pain-related genetic factors that are associated with PTP.

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Article Synopsis
  • Genetic factors, particularly Polygenic Risk Scores (PRSs), influence the likelihood of developing schizophrenia (SZ) and bipolar disorder (BD), with findings showing that SZ risk groups exhibit significant cognitive impairments.
  • Epigenome-wide association studies (EWASs) revealed numerous differentially methylated positions (DMPs) related to SZ in blood samples, highlighting a stark contrast between genetic SZ risk patients and those with lower genetic risks.
  • DNA Methylation Risk Scores (MRSs) for SZ were notably higher in SZ patients compared to healthy controls, especially among those with elevated genetic SZ risk, suggesting a potential epigenetic link to the disorder's pathogenesis.
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Patients with chronic pain are affected psychologically and socially. There are also individual differences in treatment efficacy. Insufficient research has been conducted on genetic polymorphisms that are related to individual differences in the susceptibility to chronic pain.

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  • Individual differences in postoperative nausea and vomiting (PONV) led to a genome-wide association study (GWAS) involving 806 patients who underwent elective surgery with general anesthesia.
  • The study identified specific single-nucleotide polymorphisms (SNPs), such as rs2776262 and rs140703637, linked to increased nausea, as well as additional SNPs for patients who received propofol.
  • Findings may help predict those at risk for PONV and improve prophylactic treatments in the future.
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Aims: Cigarette smoking is a preventable risk factor for various diseases such as cancer, ischemic stroke, cardiac stroke, and chronic obstructive pulmonary disease. Smoking cessation is of great importance not only for individual smokers but also for social health. Regarding current cessation therapies, the effectiveness of nicotine replacement is limited, and the cost of varenicline medication is considerable.

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Phantom tooth pain (PTP) is a rare and specific neuropathic pain that occurs after pulpectomy and tooth extraction, but its cause is not understood. We hypothesized that there is a genetic contribution to PTP. The present study focused on the gene, which encodes the α1C subunit of the Ca1.

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  • The study investigates the role of mitochondrial genetic variants in the development of bipolar disorder (BD), schizophrenia (SZ), and psychotic disorders (PSY) in a Japanese population, highlighting that previous research primarily focused on individuals of European ancestry.
  • Using quality control methods, researchers analyzed 45 genetic variants in 420 participants (BD patients, SZ patients, and healthy controls) to identify associations with the disorders.
  • Four specific variants showed significant associations with BD and PSY, particularly the rs200044200 variant, which was found only in BD patients, suggesting mitochondrial dysfunction may play a role in the pathogenesis of these disorders.
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  • * A genome-wide association study (GWAS) of 350 patients undergoing surgery aimed to find SNPs that influence the minimum effective concentration (MEC) of fentanyl post-op.
  • * The study found that the SNP rs966775 was linked to higher MECs of fentanyl, with its minor G allele associated with increased dosages; this has implications for personalized pain management in recovery.
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Autotaxin, encoded by the gene, is a known key element of neuropathic pain; however, its involvement in nociceptive pain processing remains unclear. We explored the associations between postoperative pain intensity, 24-h postoperative opioid dose requirements, and 93 -gene single-nucleotide polymorphisms (SNPs) in 362 healthy patients who underwent cosmetic surgery using the dominant, recessive, and genotypic models. Next, we validated the associations between relevant SNPs on the one hand and pain intensity and daily opioid dosages on the other in 89 patients with cancer-related pain.

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Chronic pain is reportedly associated with the transient receptor potential canonical 3 () gene. The present study examined the genetic associations between the single-nucleotide polymorphisms (SNPs) of the gene and chronic pain. The genomic samples from 194 patients underwent linkage disequilibrium (LD) analyses of 29 SNPs within and around the vicinity of the gene.

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  • * The study identified two specific single-nucleotide polymorphisms (SNPs) in the ANGPT1 gene, which were significantly associated with the amount of opioids required for pain relief (p < 5.0000 × 10−8).
  • * The results suggest that these SNPs and others could be used as indicators for predicting the effectiveness of opioid treatments in cancer pain management, paving the way for more personalized approaches to pain therapy.
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Article Synopsis
  • Genetic factors influence how individuals experience pain, prompting researchers to conduct a genome-wide association study (GWAS) focused on patients with cancer pain and the general population.
  • The study combined two cohorts: an exploratory group assessed using pain intensity ratings and opioid dosages, and a confirmatory group that evaluated habitual use of nonsteroidal anti-inflammatory drugs.
  • A novel single-nucleotide polymorphism (SNP) associated with pain was identified on chromosome 7, linked to the gene for pleiotrophin, which showed significant correlations with analgesic use, although its minor allele affected pain in the opposite way than expected.
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Background: Individuals with schizophrenia (SCZ) and bipolar disorder (BD) display cognitive impairments, but the impairments in those with SCZ are more prominent, supported by genetic overlap between SCZ and cognitive impairments. However, it remains unclear whether cognitive performances differ between individuals at high and low genetic risks for SCZ or BD.

Methods: Using the latest Psychiatric Genomics Consortium (PGC) data, we calculated PGC3 SCZ-, PGC3 BD-, and SCZ BD polygenic risk scores (PRSs) in 173 SCZ patients, 70 unaffected first-degree relatives (FRs) and 196 healthy controls (HCs).

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  • Individual differences exist in how people respond to opioid pain relief, leading researchers to explore specific genetic variations (SNPs) related to this sensitivity.
  • The study examined three SNPs (rs12496846, rs698705, and rs10052295) in patients who had major abdominal surgeries, focusing on the rs12496846 SNP's connection to pain relief needs.
  • Results revealed that carriers of the G allele of the rs12496846 SNP required more pain relief post-surgery and exhibited lower expression of the C3orf20 gene, suggesting this SNP might help predict how much pain relief a patient will need.
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Short tandem repeats (STRs) and variable number of tandem repeats (VNTRs) that have been identified at approximately 0.7 and 0.5 million loci in the human genome, respectively, are highly multi-allelic variations rather than single-nucleotide polymorphisms.

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Phantom tooth pain (PTP) is a rare and specific neuropathic pain that occurs after pulpectomy and tooth extraction, but its cause is not understood. We hypothesized that there is a genetic contribution to PTP. We focused on solute carrier family 17 member 9 (SLC17A9)/vesicular nucleotide transporter (VNUT) and purinergic receptor P2Y12 (P2RY12), both of which have been associated with neuropathic pain and pain transduction signaling in the trigeminal ganglion in rodents.

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Acute pain that is associated with herpes zoster (HZ) can become long-lasting neuropathic pain, known as chronic post-herpetic neuralgia (PHN), especially in the elderly. HZ is caused by the reactivation of latent varicella-zoster virus (VZV), whereas PHN is not attributed to ongoing viral replication. Although VZV infection reportedly induces neuronal cell fusion in humans, the pathogenesis of PHN is not fully understood.

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Pain sensitivity differs individually, but the mechanisms and genetic factors that underlie these differences are not fully understood. To investigate genetic factors that are involved in sensing cold pain, we applied a cold-induced pain test and evaluated protease-activated receptor 2 (PAR2/F2RL1) and transient receptor potential melastatin 8 (TRPM8), which are related to pain. We statistically investigated the associations between genetic polymorphisms and cold pain sensitivity in 461 healthy patients who were scheduled to undergo cosmetic orthognathic surgery for mandibular prognathism.

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