Publications by authors named "Koji Ozaki"

Carrot () is cultivated in temperate regions for its taproot. Eastern and Western types have been differentiated. In Japan, the former type is categorized into Kintoki, Takinogawa oonaga, and Toso, with a few local cultivars.

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We report on a 16-year-old Japanese boy in whom an esophageal squamous cell carcinoma (ESCC) developed 12 years after allogeneic hematopoietic stem cell transplantation was performed for aplastic anemia. A high frequency of microsatellite instability was detected in samples of ESCC. Moreover, the detection of pathogenic variants, including single nucleotide substitution of TP53 (c.

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Article Synopsis
  • Novel therapies targeting BET proteins have shown promise in treating various cancers but resistance mechanisms are not well understood.
  • In the study, U937 cells treated with the BET inhibitor I-BET151 exhibited growth inhibition and apoptosis, while I-BET151-resistant U937R cells did not show these effects.
  • Combining I-BET151 with an IKK inhibitor improved apoptosis in both cell types and suggested that the resistance in U937R cells is linked to increased NF-κB signaling through BRD2 and BRD4 expression, indicating a potential therapeutic strategy to combat this resistance.
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Objective: This study measured serum and follicular fluid (FF) levels of biopterin, neopterin, vascular endothelial growth factor (VEGF), and macrophage colony-stimulating factor (M-CSF) in patients receiving mild ovarian stimulation for oocyte retrieval.

Patients And Methods: Infertile patients who underwent ovarian stimulation were divided into the following: Group 1, no oocyte retrieval (n = 12), and Group 2, retrieval of more than four oocytes (n = 13). Median total gonadotropin dose in both groups was 150 IU.

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There is a need for an effective and noninvasive treatment for intractable bone marrow edema syndrome of the hip. Forty-six patients with intractable bone marrow edema syndrome of the hip were retrospectively studied to compare the short-term clinical effects of treatment with high-energy extracorporeal shock wave therapy vs femoral head core decompression. The postoperative visual analog scale score decreased significantly more in the extracorporeal shock wave therapy group compared with the femoral head core decompression group (P<.

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Objectives: We aimed to construct reference ranges for time intervals of each component of cardiac flow velocity waveforms in normal fetuses, comparing those variables between right and left ventricles.

Methods: In 359 fetuses at the gestational age of 17-38 weeks, the durations of atrioventricular (AV) valve opening (AVVO), AV valve closure (AVVC), total E- (total-E) and A- (total-A) waves, total ejection time (total-ET), acceleration time (acc-E for E-wave, acc-A for A-wave, and acc-ET for ejection time), and deceleration time (dec-E for E-wave, dec-A for A-wave, and dec-ET for ejection time) were studied cross sectionally.

Results: Both right and left acc-E showed the strongest correlations with gestational age (r = 0.

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A 79-year-old male, with a history of percutaneous coronary intervention (PCI), was referred to our cardiovascular department for a detailed examination of blackout caused by sinus arrest only during meals. Ultrasound echocardiography showed normal cardiac contraction with no asynergy, irrespective of the remaining stenotic coronary lesion. An electrophysiological study revealed deteriorated atrioventricular nodal conduction at a Wenckebach point of 70 beats per minute.

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We examined the role of molecules related to drug resistance, such as P-glycoprotein (P-gp) and telomerase (TERT), signaling molecules of STATs and FLT3 in leukemia pathogenesis in de novo acute myeloid leukemia (AML), and myelodysplastic syndrome in the phase of overt leukemia (MDS-OL). Subjects were 18 patients with de novo AML, in which expression of P-gp, TERT, STAT3, STAT5, and FLT3 was observed in 11, 14, 16, 18, and 14 of patients, respectively. Phosphorylation of STAT3, STAT5, and FLT3 in patients with de novo AML was observed in 10 out of 14, 14 out of 18, and 10 out of 14 patients, respectively.

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Various anticancer drugs, including camptothecins and indolocarbazoles, target DNA topoisomerase I (Top1). We previously described the camptothecin-resistant colon cancer cell line DLDSNR6, which has a Gly365Ser missense mutation in Top1. In the present study, we established highly camptothecin-resistant sublines from DLDSNR6 cells by continuous exposure to higher camptothecin concentrations.

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Reproductive hormones exert their actions via receptors in diverse tissues. In this study, we examined the expression of estrogen receptors (ERalpha and ERbeta), progesterone receptor (PR), and follicle-stimulating hormone receptor (FSHR) in the adipose tissue and reproductive organs of mice following oral treatment with Dandelion T-1 extract (DT-1E) for 6 weeks. Quantitative assays by real-time reverse transcription polymerase chain reaction showed enhanced expression of ERalpha and ERbeta mRNA in the adipose tissue of mice fed a diet containing DT-1E compared with the control group fed a plain diet.

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Objective: To examine the effect of a low concentration of DHEAS on the expression of the androgen receptor, estrogen receptor alpha and beta, progesterone receptor, aromatase, 3-beta-hydroxysteroid dehydrogenase, and cyclooxygenase-2 in human preovulatory granulosa cells, and to measure their production of steroid hormones (estrone, estradiol, progesterone, androstenedione, and testosterone).

Design: Analysis of cultured primary human preovulatory granulosa cells by real-time reverse-transcriptase polymerase chain reaction and assays of hormone production.

Setting: Osaka City University Postgraduate School of Medicine.

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Background: Insulin-lowering agents are reported to be useful in treating polycystic ovary syndrome (PCOS) anovulation. It has been suggested that lower insulin levels secondarily affect ovarian tissue, although the direct mechanism of action has not yet been verified. Here we investigated if these agents directly affect the ovary.

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Prostaglandins play important roles for oocyte maturation and follicular rupture. Cyclooxygenase-2 (COX-2), an inducible isoform of a prostaglandin metabolic enzyme, is essential for the timed production of prostaglandins in the ovary. The aim of the present study is to examine expression and distribution of COX-2 in human ovarian follicles at each of the maturation stages.

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Objective: To evaluate 2 methods of processing testicular tissue for the retrieval of viable sperm from men with nonobstructive azoospermia.

Study Design: Fresh testicular tissue was obtained from nonobstructive azoospermia patients using a biopsy needle. The specimens were divided into 2 fractions.

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