Journal of Clinical Biochemistry and Nutrition最新文献

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Development of ratiometric sirtuin fluorescence probes via cleavage of a coumarin dye. 香豆素染料裂解制备比例型sirtuin荧光探针。
IF 1.9 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-03-01 Epub Date: 2025-11-26 DOI: 10.3164/jcbn.25-201
Mitsuyasu Kawaguchi, Ushio Komoda, Naoya Ieda, Yuhei Ohta, Hidehiko Nakagawa
{"title":"Development of ratiometric sirtuin fluorescence probes via cleavage of a coumarin dye.","authors":"Mitsuyasu Kawaguchi, Ushio Komoda, Naoya Ieda, Yuhei Ohta, Hidehiko Nakagawa","doi":"10.3164/jcbn.25-201","DOIUrl":"10.3164/jcbn.25-201","url":null,"abstract":"<p><p>Dysfunction of sirtuins (SIRTs), a family of NAD<sup>+</sup>-dependent histone deacetylases involved in epigenetic modulation of protein function and gene expression, is associated with both age-related metabolic diseases and cancers in mammals, and SIRT modulators are considered attractive therapeutic targets. However, although various SIRT detection methodologies have been developed, especially focusing on other enzymatic activities of SIRTs, such as long chain defatty-acylase activity, there has been little progress in developing methodologies capable of quantitatively evaluating SIRT activity. Herein, we present the first Förster resonance energy transfer (FRET)-based ratiometric fluorescence probes for SIRT1, containing fluorescein isothiocyanate (FITC) as a FRET acceptor, coumarin as a FRET donor and an H3K9 SIRT recognition peptide sequence. Cleavage by SIRT of firstly designed probe released the coumarin fluorophore and structural modification of the latter units yielded compounds with high SIRT1 selectivity and reactivity. We confirmed that these probes enabled the quantitative measurement of SIRT1 enzyme activity. They are expected to be useful tools in studies of epigenetic regulation mechanisms, and in high-throughput screening for drug discovery targeting SIRT.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 2","pages":"102-108"},"PeriodicalIF":1.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12989229/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147467960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Association between comprehensive dietary antioxidant index and stroke: mediating role of oxidative stress. 综合膳食抗氧化指数与脑卒中的关系:氧化应激的中介作用。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-11-07 DOI: 10.3164/jcbn.25-125
Meixuan Zheng, Shuyi Xiong
{"title":"Association between comprehensive dietary antioxidant index and stroke: mediating role of oxidative stress.","authors":"Meixuan Zheng, Shuyi Xiong","doi":"10.3164/jcbn.25-125","DOIUrl":"https://doi.org/10.3164/jcbn.25-125","url":null,"abstract":"<p><p>Consuming a diet high in antioxidants can help lower the risk of stroke. Although the association between the comprehensive dietary antioxidant index (CDAI) and stroke has not been extensively researched, it is a useful tool for evaluating the antioxidant capacity of the diet. To look at any possible processes that may be at play in the association between stroke risk and CDAI. The National Health and Nutrition Examination Survey (NHANES) database, which collected data on stroke patients between 2003 and 2018, was utilized. The study involved three independent variables: CDAI, stroke, serum albumin, and gamma-glutamyltransferase (GGT) as mediating factors. The association between CDAI and stroke was examined using logistic regression models, and the non-linear relationship between the two was investigated using restricted cubic splines (RCS). Furthermore, the possible mediating function of serum albumin and GGT in the connection between CDAI and stroke was examined by the use of mediation analysis. Spearman correlation coefficients were used to evaluate the relationship between the stroke risk and the CDAI component parts. 31,313 non-stroke participants and 1,215 stroke patients were included in this research. The data revealed a negative connection between CDAI and stroke (OR: 0.96, 95% CI: 0.93-0.99, <i>p</i><0.01) after controlling for all confounding factors. A 38% reduction in the risk of stroke was linked to the highest quartile level of CDAI (OR: 0.62, 95% CI: 0.48-0.80, <i>p</i><0.001). A non-linear negative connection (P-non-linear = 0.0346) between CDAI and stroke was revealed using RCS analysis. Significant mediation effects on the link between CDAI and stroke are attributed to serum albumin (10.98%; <i>p</i><0.001) and GGT (0.33%; <i>p</i><0.024), respectively. The Spearman correlation coefficient results showed that vitamin A (r = 0.76) and vitamin E (r = 0.75) in CDAI were most strongly correlated with stroke, while carotenoids reduce the risk of stroke by mediating serum albumin (Proportion of mediation = 25.16%). There was a negative correlation found between CDAI and stroke risk. It could be advantageous to consume more vitamin A and E to help avoid cardiovascular illnesses.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"52-59"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832140/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advances in redox imaging for cancer diagnosis and therapy. 氧化还原成像在癌症诊断和治疗中的应用进展。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-11-06 DOI: 10.3164/jcbn.25-211
Hironobu Yasui, Kazuhiro Kato, Tomoki Bo, Osamu Inanami
{"title":"Advances in redox imaging for cancer diagnosis and therapy.","authors":"Hironobu Yasui, Kazuhiro Kato, Tomoki Bo, Osamu Inanami","doi":"10.3164/jcbn.25-211","DOIUrl":"https://doi.org/10.3164/jcbn.25-211","url":null,"abstract":"<p><p>Cancer remains a leading cause of global morbidity and mortality, necessitating continuous innovations in diagnosis and therapy. Redox biology, the balance between reactive oxygen species production and antioxidant defenses, plays a central role in tumor initiation, progression, and therapeutic response. Elevated reactive oxygen species levels drive DNA damage, genomic instability, and tumor-promoting signaling, whereas adaptive antioxidant responses promote survival, therapeutic resistance, and recurrence. Chemotherapy and radiotherapy partly exert their cytotoxic effects through reactive oxygen species generation. However, tumors with enhanced redox-buffering capacity often evade reactive oxygen species-mediated killing. Ferroptosis, iron-dependent cell death driven by lipid peroxidation, is a key redox-linked pathway that synergizes with radiotherapy, offering new radiosensitization strategies. Redox imaging is a non-invasive approach to map oxidative and reductive dynamics in tumors. This review outlines the unique strengths of advancements, including optical imaging with redox-sensitive probes, positron emission tomography tracers targeting glutamine metabolism or system X<sub>c</sub> <sup>-</sup>, magnetic resonance imaging with nitroxide-based probes and dynamic nuclear polarization, and electron paramagnetic resonance imaging. Together, these developments underscore the potential of redox imaging as a research and clinical tool. By enabling functional tumor characterization, patient stratification, and treatment monitoring, redox-based imaging provides a framework for precision oncology and development of redox-modulating therapies.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"14-18"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832139/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DNA-mediated ZNF649 downregulation modulates the Hedgehog signaling pathway to reduce the sensitivity of gastric cardia cancer to 5-FU. dna介导的ZNF649下调Hedgehog信号通路,降低胃癌对5-FU的敏感性。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-11-01 DOI: 10.3164/jcbn.24-212
Ganshu Xia, Baozhong Li, Xiaolong Liang, Yunjie Wan, Zhiqiang Liu
{"title":"DNA-mediated ZNF649 downregulation modulates the Hedgehog signaling pathway to reduce the sensitivity of gastric cardia cancer to 5-FU.","authors":"Ganshu Xia, Baozhong Li, Xiaolong Liang, Yunjie Wan, Zhiqiang Liu","doi":"10.3164/jcbn.24-212","DOIUrl":"https://doi.org/10.3164/jcbn.24-212","url":null,"abstract":"<p><p>Gastric cardia adenocarcinoma (GCA), an aggressive gastric cancer with rising incidence and poor prognosis, often requires chemotherapy and surgery. This study aimed to explore the regulatory mechanism of ZNF649 on 5-FU sensitivity in GCA. ZNF649 expression in GCA was analyzed using The Cancer Genome Atlas (TCGA) database. The relationship between ZNF649 expression and methylation level was analyzed using MethylMix and MethPrimer. GCA data was used to predict ZNF649-related signaling pathways via gene set enrichment analysis (GSEA). qPCR, western blot, and immunohistochemistry were used to detect ZNF649 expression at mRNA and protein levels. MSP was used to detect ZNF649 methylation in clinical samples. Cell viability and apoptosis were assessed by CCK8 and flow cytometry. ZNF649 was downregulated in GCA tissues and cells, negatively correlating with DNA methylation in its promoter. Overexpressing ZNF649 increased GCA cell sensitivity to 5-FU, lowering IC50 values and enhancing apoptosis. ZNF649 negatively regulated the Hedgehog pathway. Knocking down ZNF649 activated Hedgehog signaling, reducing 5-FU sensitivity. DNA methylation silences ZNF649, activating the Hedgehog pathway and weakening GCA cell sensitivity to 5-FU. Targeting ZNF649 and the Hedgehog pathway may overcome 5-FU resistance in GCA patients.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"75-82"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832141/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shear stress stimuli-induced erythrocytes' mechanical damage, and its relation to erythrocytes' membrane oxidation and cellular aging. 剪切应力刺激引起的红细胞机械损伤及其与红细胞膜氧化和细胞老化的关系。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-10-04 DOI: 10.3164/jcbn.25-149
Nobuo Watanabe, Masataka Inoue, Yugo Kato, Rei Kubota, Daisuke Sakota, Koji Fukui
{"title":"Shear stress stimuli-induced erythrocytes' mechanical damage, and its relation to erythrocytes' membrane oxidation and cellular aging.","authors":"Nobuo Watanabe, Masataka Inoue, Yugo Kato, Rei Kubota, Daisuke Sakota, Koji Fukui","doi":"10.3164/jcbn.25-149","DOIUrl":"https://doi.org/10.3164/jcbn.25-149","url":null,"abstract":"<p><p>Several similarities between shear-stress-induced mechanically damaged erythrocytes and physiologically aged erythrocytes have been reported, including mechanical fragility, increased aggregability, altered membrane charge, and loss of membrane lipid. Additionally, we found that mechanically circulated blood using a centrifugal blood pump showed an increase in erythrocyte membrane oxidation. This raised the question of how much oxidation can be induced under shear stress and how it relates to cellular aging. Therefore, we investigated membrane oxidation in density-isolated erythrocytes (young and old) exposed to shear conditions. Human stored blood was exposed to shear stresses of 5, 10, 30, 60, and 90 ‍Pa for exposure times of 0, 5, 10, and 15 ‍min. The sheared blood was then layered onto a centrifuge tube preloaded with two Percoll density solutions (1.10 and 1.12 ‍g/ml). After centrifugation, erythrocytes from the two density layers were collected and designated as young and old erythrocytes, which were used as the study samples. Across all shear conditions, old erythrocytes showed higher lipid peroxide fluorescence per unit area compared with young erythrocytes. However, the rate of increase in oxidation before and after shear exposure was greater in young erythrocytes. These findings suggest that there may be a limit to the extent of membrane oxidation.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"37-42"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832134/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heme-porphyrin metabolism in photodynamic therapy associated with reactive oxygen species. 光动力治疗中与活性氧相关的血红素-卟啉代谢。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-10-23 DOI: 10.3164/jcbn.25-181
Hirofumi Matsui, Hiromu Ito
{"title":"Heme-porphyrin metabolism in photodynamic therapy associated with reactive oxygen species.","authors":"Hirofumi Matsui, Hiromu Ito","doi":"10.3164/jcbn.25-181","DOIUrl":"https://doi.org/10.3164/jcbn.25-181","url":null,"abstract":"<p><p>Photodynamic therapy is a cancer treatment that is minimally invasive and combines photosensitizers with laser irradiation. Among the photosensitizers used in photodynamic therapy, porphyrin compounds have been widely applied because they specifically accumulate in cancer cells, and this approach has already been introduced into clinical practice. However, the detailed mechanism of porphyrin accumulation in cancer cells has not yet been clarified. The authors focused on the structural similarity between heme and porphyrin and demonstrated that the heme carrier protein 1 (HCP1) functions as an importer not only for heme but also for porphyrins. In addition, the expression of HCP1 was found to be regulated by reactive oxygen species (ROS) generated in mitochondria. Certain adjuvant treatments-such as hyperthermia, radiation, and chemical compounds including anticancer drugs-induced mitochondrial ROS production and increased the accumulation of porphyrin compounds through the upregulation of HCP1, thereby enhancing the effectiveness of cancer therapy by laser irradiation. Furthermore, ROS derived from mitochondria were also implicated in the excretion mechanism of porphyrins. Since mitochondria are a major source of ROS through respiratory metabolism, their accurate regulation is essential for optimizing cancer therapy using photodynamic therapy.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832135/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reactive oxygen species generation by photothermal effects of adhesive near-infrared agents on the plasma membrane. 近红外胶粘剂在质膜上光热作用产生活性氧。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-10-17 DOI: 10.3164/jcbn.25-113
Saori Fujiwara, Toru Yoshitomi, Naoki Kawazoe, Guoping Chen, Hiroko Bando, Hisato Hara, Hirofumi Matsui
{"title":"Reactive oxygen species generation by photothermal effects of adhesive near-infrared agents on the plasma membrane.","authors":"Saori Fujiwara, Toru Yoshitomi, Naoki Kawazoe, Guoping Chen, Hiroko Bando, Hisato Hara, Hirofumi Matsui","doi":"10.3164/jcbn.25-113","DOIUrl":"https://doi.org/10.3164/jcbn.25-113","url":null,"abstract":"<p><p>Near-infrared photothermal cancer therapy has attracted increasing attention due to its non-invasiveness, high selectivity, and spatiotemporally controllable local treatment. A novel near-infrared photothermal agent was developed, consisting of a plasma membrane-adhesive indocyanine green conjugated with a polycation bearing quaternary ammonium salt groups, called adhesive indocyanine green, for locally administered near-infrared photothermal cancer therapy. In this study, the photothermal effects of adhesive indocyanine green on the plasma membrane were investigated using a rat gastric mucosal cancer cell line. Upon light irradiation, adhesive indocyanine green exhibited a photothermal effect without generating singlet oxygen. Due to electrostatic interaction, adhesive indocyanine green adhered to negatively charged polysaccharides on the plasma membrane of rat gastric mucosal cancer cells. When the cells were irradiated with near-infrared light at 808 ‍nm at 108 ‍J/cm<sup>2</sup>, levels of intracellular reactive oxygen species significantly increased despite the absence of a detectable temperature rise in the cell culture medium. These results indicate the generation of intracellular reactive oxygen species by the photothermal effects of plasma membrane-adhesive near-infrared photothermal agents.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"60-65"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832138/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Micheliolide reduces the damage, pyroptosis and oxidative stress of cardiomyocytes caused by OGD/R by regulating the AMPK signaling pathway. 米谢利内酯通过调节AMPK信号通路减轻OGD/R引起的心肌细胞损伤、焦亡和氧化应激。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-11-01 DOI: 10.3164/jcbn.25-159
Jinzhu Yin, Jin Qu, Zhaozheng Liu
{"title":"Micheliolide reduces the damage, pyroptosis and oxidative stress of cardiomyocytes caused by OGD/R by regulating the AMPK signaling pathway.","authors":"Jinzhu Yin, Jin Qu, Zhaozheng Liu","doi":"10.3164/jcbn.25-159","DOIUrl":"https://doi.org/10.3164/jcbn.25-159","url":null,"abstract":"<p><p>Myocardial ischemia-reperfusion (I/R) injury remains a devastating clinical problem, contributing substantially to morbidity and mortality worldwide. In the present study, we investigated the potential role of Micheliolide (MCL) in attenuating cardiac I/R injury. H9c2 cardiomyocytes were pretreated with MCL for 24 ‍h and then subjected to oxygen-glucose deprivation/reoxygenation (OGD/R). Cellular injury was evaluated by measuring cell viability and lactate dehydrogenase (LDH) release, while cell death was assessed using propidium iodide (PI) staining. Oxidative stress was determined by assessing superoxide dismutase (SOD) activity, malondialdehyde (MDA) content, and glutathione peroxidase (GSH-Px) activity, while the expression levels of AMP-activated protein kinase (AMPK), acetyl-CoA carboxylase (ACC), and pyroptosis-related proteins were examined by Western blotting. The results demonstrated that MCL significantly alleviated OGD/R-induced damage in H9c2 cells. Moreover, MCL inhibited OGD/R-induced oxidative stress and pyroptosis while enhancing AMPK pathway activation. Importantly, the protective effect of MCL was attenuated in the presence of the AMPK inhibitor Compound C, indicating that activation of the AMPK signaling pathway is required for MCL-mediated cytoprotection.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"66-74"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832142/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mixed lesions in premalignant colorectal polyps. 结直肠癌前息肉混合性病变。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-11-06 DOI: 10.3164/jcbn.25-187
Toru Arano, Toshihiro Nishizawa, Hidenobu Watanabe, Mari Mizutani, Teppei Akimoto, Masaya Sano, Hirotoshi Ebinuma, Hidekazu Suzuki, Keisuke Hata, Osamu Toyoshima
{"title":"Mixed lesions in premalignant colorectal polyps.","authors":"Toru Arano, Toshihiro Nishizawa, Hidenobu Watanabe, Mari Mizutani, Teppei Akimoto, Masaya Sano, Hirotoshi Ebinuma, Hidekazu Suzuki, Keisuke Hata, Osamu Toyoshima","doi":"10.3164/jcbn.25-187","DOIUrl":"https://doi.org/10.3164/jcbn.25-187","url":null,"abstract":"<p><p>Colonoscopists occasionally encounter mixed lesions with overlapping histological features. The frequency and combinations of such mixed colorectal polyps remain poorly understood. We comprehensively analyzed the frequencies and combinations of histologically mixed premalignant colorectal polyps. This study had a retrospective, single-center, cross-sectional design. Patients who underwent colonoscopy at the Toyoshima Endoscopy Clinic between March 2022 and July 2023 were eligible. We excised lesions diagnosed as conventional adenomas or clinically significant serrated polyps. Among these polyps, we focused on mixed lesions and analyzed their frequency and combinations. Among 9,682 resected colorectal lesions, 61 (0.63%) were classified as mixed lesions. The most common combination was microvesicular hyperplastic polyp (MVHP) + goblet cell-rich hyperplastic polyp (GCHP) (41.0%), followed by sessile serrated lesion (SSL) + traditional serrated adenoma (TSA) (21.3%), MVHP + conventional adenoma (9.8%), and TSA + conventional adenoma (9.8%). The mixed rates for MVHPs, GCHPs, SSLs, TSAs, and conventional adenomas were 2.3%, 3.7%, 2.9%, 53.5%, and 0.28%, respectively. Mixed MVHP + GCHP lesions were significantly larger than pure GCHPs (5.3 ‍mm vs 4.0 ‍mm, <i>p</i><0.01). The frequencies and combinations of mixed premalignant colorectal lesions found in this study may reflect the histogenesis of neoplasia and genetic mutations.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"83-87"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832143/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Carotenoid bioavailability in humans reflects the mammalian nocturnal bottleneck: a position paper. 类胡萝卜素在人类中的生物利用度反映了哺乳动物夜间的瓶颈:一份立场文件。
IF 1.7 4区 医学
Journal of Clinical Biochemistry and Nutrition Pub Date : 2026-01-01 Epub Date: 2025-10-17 DOI: 10.3164/jcbn.25-170
Junji Terao
{"title":"Carotenoid bioavailability in humans reflects the mammalian nocturnal bottleneck: a position paper.","authors":"Junji Terao","doi":"10.3164/jcbn.25-170","DOIUrl":"https://doi.org/10.3164/jcbn.25-170","url":null,"abstract":"<p><p>Recommended levels of dietary carotenoids remain uncertain, although their health benefits have gained renewed interest. One reason is that humans have a unique bioavailability of carotenoids compared to other mammals, which is not well understood. This position paper suggests that humans' bioavailability of dietary carotenoids reflects the mammalian nocturnal bottleneck-a period when the ancestors of modern mammals became nocturnal during the Mesozoic era to avoid predatory dinosaurs. The roles of carotenoids are closely linked to evolutionary processes involving light and vision. Vertebrates developed advanced color vision by using specific xanthophylls in their photoreceptor cells. In contrast, mammals' color vision declined due to their nocturnal lifestyle. Primates later returned to daytime activity and accumulated two xanthophylls, lutein and zeaxanthin, from their diet, in the macular lutea of the eyes, to protect color vision. Additionally, humans uniquely store β-carotene and lycopene in exposed skin. Throughout primate evolution, humans' ability to accumulate dietary carotenoids shifted from xanthophylls toward less polar carotenoids, including β-carotene and lycopene, unlike the high selectivity of xanthophylls observed in birds. Overall, carotenoid deposition in human tissues is not highly specialized, likely due to remnants of the mammalian nocturnal bottleneck. We should consider this when evaluating recommended carotenoid intake.</p>","PeriodicalId":15429,"journal":{"name":"Journal of Clinical Biochemistry and Nutrition","volume":"78 1","pages":"27-36"},"PeriodicalIF":1.7,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12832137/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146052347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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