Human biodistribution and radiation dosimetry of two novel α-synuclein PET tracers, F-SPAL-T-06 and F-C05-05.

F-SPAL-T-06 and F-C05-05 are two novel positron emission tomography (PET) radioligands targeting α-synuclein fibrils. Our study aimed to evaluate the biodistribution, safety, and radiation dosimetry of each tracer in humans. Biodistribution and radiation dosimetry studies were carried out with two healthy volunteers for each tracer, F-SPAL-T-06 (one female and one male volunteer, both aged 63 years) and F-C05-05 (one female and one male volunteer, aged 63 and 73 years, respectively).

XFEL crystallography reveals catalytic cycle dynamics during non-native substrate oxidation by cytochrome P450BM3.

Cytochrome P450s are haem-containing enzymes, catalysing the regio- and stereospecific oxidation of non-activated hydrocarbons. Among these, the bacterial P450BM3 is a promising biocatalyst due to its high enzymatic activity. Given the significant conformational flexibility of this enzyme, understanding protein-substrate interactions and associated structural dynamics are crucial for designing P450BM3-based biocatalysts.

The efficacy and safety of FOLFOX therapy for advanced esophageal squamous cell carcinoma.

Cisplatin-based chemotherapy is the standard advanced esophageal squamous cell carcinoma (ESCC) treatment. However, the 5-fluorouracil plus L-leucovorin and oxaliplatin (FOLFOX) regimen is available in Japan as an alternative to cisplatin-based chemotherapy, but its efficacy and safety remain unclear. Hence, we aimed to evaluate patients with advanced ESCC who received FOLFOX therapy retrospectively.

ACLY Promotes Cardiac Fibrosis via the Regulation of DNL and Histone Acetylation.

Background: ATP citrate lyase (ACLY) is a key enzyme in de novo lipogenesis that generates acetyl-CoA from citrate. Although fatty acids are required for energy production and biomass synthesis in the heart, the regulatory mechanisms of ACLY-mediated de novo lipogenesis in pathological cardiac fibroblasts remain unknown. The aim of this study was to investigate the biological role of ACLY in cardiac remodeling.

U-shaped relationship between body mass index and intracerebral hemorrhage-related functional decline.

Background: Body mass index (BMI) is associated with the sites of intracerebral hemorrhage (ICH), which affect functional decline. However, the optimal BMI range for minimizing functional decline remains unclear. This study aimed to clarify the relationship between BMI and ICH-related functional decline.

Awake brain MRSI reveals anesthetic sensitivity and regional aging effects on [C]bicarbonate metabolism in mice.

Abnormalities and alterations in the glycolytic pathway in the pathology of neurodegenerative diseases and brain aging have received much attention, as clinical applications of proton-based magnetic resonance spectroscopy (MRS) have recently illuminated the elevation of lactate concentrations in the brains of patients with neurodegenerative diseases, including Alzheimer's disease. Hyperpolarized [1-C]pyruvate MRS has shown promise for neurological applications because it enables the real-time detection of glycolysis and oxidative phosphorylation flux. In studies of the mouse brain using hyperpolarized [1-C]pyruvate, there are few reports that the signal of [C]bicarbonate, a product of oxidative phosphorylation metabolized from [1-C]pyruvate, was detected using MR spectroscopic imaging (MRSI) that allows spatial mapping of metabolism, although there have been reports of [C]bicarbonate signals being detected by pulse-acquire sequences in the entire brain.

Adaptive walking performance is related to the hip joint position sense during active hip flexion rather than during passive hip flexion.

The purpose of this study was to investigate the relationship between hip joint position sense during active or passive hip flexion and adaptive walking performance across obstacles. After screening, 30 young men with the right dominant leg (age, 21 ± 2 years) participated in the experiment. To measure adaptive walking performance on the first day, the participants stepped over an obstacle underfoot with the left leg just high enough to avoid touching the obstacle.

Urinary Dopamine Levels Can Predict the Avidity of Post-Therapy [I]MIBG Scintigraphy in Unresectable or Metastatic Pheochromocytomas and Paragangliomas: A Preliminary Clinical Study.

: Pheochromocytomas and paragangliomas (PPGLs) are rare neuroendocrine tumors that produce catecholamines. Unresectable or metastatic PPGLs are treated with [I]metaiodobenzylguanidine (MIBG), but MIBG avidity is often heterogeneous. Identifying predictive factors for non-avid lesions on scintigraphy is clinically important.

312 nm UVB Phototherapy Limits Atherosclerosis by Regulating Immunoinflammatory Responses in Mice.

Aim: Our previous studies identified ultraviolet B (UVB) irradiation as a possible approach for preventing atherosclerosis. The aim of this study was to clarify the effect of 312 nm UVB, a wavelength similar to that of clinically available narrow-band UVB for the treatment of psoriasis, on atherosclerosis and the underlying mechanisms.

Methods And Results: Using a recently developed UVB-light-emitting diode device, we irradiated 6-week-old male atherosclerosis-prone apolipoprotein E-deficient mice with 312 nm UVB at 5 or 10 kJ/m² and examined its effect on the development of atherosclerosis and immunoinflammatory responses by performing histological analysis, flow cytometry, biochemical assays, and liquid chromatography/mass spectrometry-based lipidomics.

Recent topics in musculoskeletal imaging focused on clinical applications of AI: How should radiologists approach and use AI?

The advances in artificial intelligence (AI) technology in recent years have been remarkable, and the field of radiology is at the forefront of applying and implementing these technologies in daily clinical practice. Radiologists must keep up with this trend and continually update their knowledge. This narrative review discusses the application of artificial intelligence in the field of musculoskeletal imaging.

The effect of calcitonin gene-related peptide monoclonal antibodies on restless legs syndrome in patients with migraine.

Background: Calcitonin gene-related peptide monoclonal antibody (CGRP mAb) effects on restless legs syndrome (RLS) are unclear.

Methods: Fifteen migraine patients (aged 49.1 ± 5.

Investigating the synergistic effects of immunochemotherapy in esophageal squamous cell carcinoma.

Background: Although combinations of immune-checkpoint inhibitors (ICI) with chemotherapy have been approved for esophageal squamous cell carcinoma (ESCC), it remains unclear whether immunochemotherapy (ICT) offers advantages over the simple addition of individual monotherapies. This study aimed to investigate whether ICT exhibits a synergistic effect in patients with advanced ESCC.

Methods: Reconstructed individual patient data of 3330 patients were electronically extracted from the Kaplan-Meier (KM) curves of eight randomized-controlled trials (ATTRACTION-3, CheckMate648, KEYNOTE-181, KEYNOTE-590, RATIONALE-302, RATIONALE-306, ESCORT, and ESCORT-1st).

Clinical utility of comprehensive genomic profiling for advanced pancreatic cancer: insights from real-world data analysis.

Background: Precision medicine is a promising therapeutic strategy for pancreatic cancer. However, only a few patients are eligible for genotype-matched treatments because of the low detection rate of actionable genomic alterations, and the clinical application of comprehensive genomic profiling (CGP) in pancreatic cancer has not been completely investigated. CGP provides considerable information, including the prognosis and eligibility of patients for genotype-matched treatments, which can guide physicians' treatment strategies.

Late gadolinium enhancement in areas with electrically fractionated potentials during sinus rhythm in patients with atrial fibrillation.

The areas with electrically fractionated potentials (AEFP) during sinus rhythm are related to non-pulmonary vein triggers and may serve as substrates of atrial fibrillation (AF) maintenance. However, the histological properties of these compounds remain unclear. Therefore, we aimed to evaluate the late gadolinium enhancement (LGE) properties of AEFP in patients with AF.

Impact of unilateral knee restraint on symmetry adaptation and double-support phase dynamic stability during split-belt walking.

The split-belt treadmill task is an effective tool for studying walking adaptation, particularly the symmetry adaptation of spatiotemporal parameters such as step length and double support time. This study aimed to evaluate the relationship between symmetry adaptation of spatiotemporal parameters and dynamic stability during the double-support phase in split-belt walking. We hypothesized that restraining fast-side knee extension, which is necessary for step lengthening during adaptation, would decrease dynamic stability during the double-support phase.

Genome Wide Association Study on Muscle Stiffness Identified Novel Locus for Predisposition to Muscle Strain Injury.

Purpose: We aimed to screen the entire genome for genetic variants associated with passive muscle stiffness, which has been suggested as a risk factor for muscle strain injury.

Methods: This genome-wide association study (GWAS) on passive muscle stiffness included 350 physically active young Japanese individuals. Three hamstring constituents were measured using ultrasound shear wave elastography.

A phase two trial evaluating FOLFIRI plus aflibercept after failure of FOLFOXIRI plus bevacizumab in patients with unresectable metastatic colorectal cancer.

Background: FOLFOXIRI plus bevacizumab (BEV) is an option for first-line treatment of metastatic colorectal cancer (mCRC). However, there is no consensus on the optimal treatment strategy when disease progresses. The EFFORT open-label, multicenter, single-arm phase II study investigated whether FOLFIRI plus aflibercept retains activity after progression of FOLFOXIRI plus BEV treatment.

Elucidation of Postfusion Structures of the Measles Virus F Protein for the Structure-Based Design of Fusion Inhibitors.

Measles is a highly infectious disease and remains a major cause of childhood mortality worldwide. In some cases, the measles virus (MV) induces subacute sclerosing panencephalitis within several years of the acute infection. The infection of the target cells by MV is mediated by the F protein, in which two heptad repeat regions, HR1 and HR2, form a six-helix bundle before membrane fusion.

Metastatic Status and Dissection Effect of Regional/Extraregional Lymph Nodes in Japanese Patients with Squamous Cell Carcinoma of the Anal Canal: A Multicenter Retrospective Cohort Study.

Objectives: Squamous cell carcinoma of the anal canal (SCCA) is a rare condition. Standard treatment includes chemoradiotherapy, with surgical treatment reserved for limited cases. In the future, the decrease in surgical frequency makes it more difficult to pathologically assess the depth of tumor invasion and lymph node status; therefore, those studies based on relatively recent surgical cases may offer valuable insights into diagnosing and treating SCCA.

Traumatic internal carotid artery aneurysm distant from facial bone fractures treated with a flow diverter stent: A case report.

Background: Traumatic intracranial aneurysms (TICAs) can be fatal if ruptured. We report a case of a TICA, distant from facial bone fractures, successfully treated with flow diverter (FD) before rupture.

Case Presentation: A 20-year-old woman was admitted following a car accident.

Effective Repeated Production of γ-glutamylcysteine, Essential For Intracellular Glutathione Production, Using Cellulose-immobilized Phytochelatin Synthase-like Enzyme NsPCS.

γ-Glutamylcysteine (γ-EC) can increase intracellular glutathione (GSH) levels, which may prevent and alleviate age-related disorders and chronic diseases caused by oxidative damage. However, the commercial availability of γ-EC remains limited owing to its complex chemical synthesis from glutamate and cysteine. In this study, we have developed the method of the effective conversion of GSH to γ-EC to achieve the optimal reaction conditions for repeated batch production and potential application in industrial γ-EC production using the phytochelatin synthase-like enzyme NsPCS.

Scoping review of initiation criteria for inhaled nitric oxide in preterm infants (born <34 weeks) after 7 days of age.

Objectives: Inhaled nitric oxide (iNO) is a known treatment for pulmonary hypertension (PH) associated with bronchopulmonary dysplasia in preterm infants after 7 days of age (postacute phase). However, a consensus regarding the optimal criteria for initiating iNO therapy in this population in the postacute phase is currently lacking. This study, therefore, aimed to identify the criteria for initiating iNO therapy, alongside the associated clinical and echocardiographic findings, in this population.