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  1. Article ; Online: Standardization of PTH measurement by LC-MS/MS: a promising solution for interassay variability.

    Nakagawa, Yosuke / Komaba, Hirotaka

    Kidney international

    2024  Volume 105, Issue 2, Page(s) 244–247

    Abstract: Parathyroid hormone measurement is critical in managing chronic kidney disease-mineral bone disorders. However, there are several commercially available immunoassays with interassay variability. To address this, Cavalier et al. developed standardization ... ...

    Abstract Parathyroid hormone measurement is critical in managing chronic kidney disease-mineral bone disorders. However, there are several commercially available immunoassays with interassay variability. To address this, Cavalier et al. developed standardization of parathyroid hormone measurement by establishing regression equations of each assay against the liquid chromatography coupled to tandem mass spectrometry method. The recalibration successfully reduced interassay variability, allowing for more consistent interpretation. The proposed approach may pave the way for accurate interpretation of parathyroid hormone in clinical practice.
    MeSH term(s) Chromatography, Liquid/methods ; Liquid Chromatography-Mass Spectrometry ; Tandem Mass Spectrometry/methods ; Parathyroid Hormone ; Immunoassay/methods ; Reference Standards
    Chemical Substances Parathyroid Hormone
    Language English
    Publishing date 2024-01-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2023.11.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Roles of Parathyroid Hormone and Fibroblast Growth Factor 23 in Advanced Chronic Kidney Disease.

    Nakagawa, Yosuke / Komaba, Hirotaka

    Endocrinology and metabolism (Seoul, Korea)

    2024  

    Abstract: Parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF23) each play a central role in the pathogenesis of chronic kidney disease (CKD)-mineral and bone disorder. Levels of both hormones increase progressively in advanced CKD and can lead to ... ...

    Abstract Parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF23) each play a central role in the pathogenesis of chronic kidney disease (CKD)-mineral and bone disorder. Levels of both hormones increase progressively in advanced CKD and can lead to damage in multiple organs. Secondary hyperparathyroidism (SHPT), characterized by parathyroid hyperplasia with increased PTH secretion, is associated with fractures and mortality. Emerging evidence suggests that these associations may be partially explained by PTH-induced browning of adipose tissue and increased energy expenditure. Observational studies suggest a survival benefit of PTHlowering therapy, and a recent study comparing parathyroidectomy and calcimimetics further suggests the importance of intensive PTH control. The mechanisms underlying the regulation of FGF23 secretion by osteocytes in response to phosphate load have been unclear, but recent experimental studies have identified glycerol-3-phosphate, a byproduct of glycolysis released by the kidney, as a key regulator of FGF23 production. Elevated FGF23 levels have been shown to be associated with mortality, and experimental data suggest off-target adverse effects of FGF23. However, the causal role of FGF23 in adverse outcomes in CKD patients remains to be established. Further studies are needed to determine whether intensive SHPT control improves clinical outcomes and whether treatment targeting FGF23 can improve patient outcomes.
    Language English
    Publishing date 2024-05-16
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2802452-7
    ISSN 2093-5978 ; 2093-5978
    ISSN (online) 2093-5978
    ISSN 2093-5978
    DOI 10.3803/EnM.2024.1978
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Case report: Unilateral masticatory atrophy caused by pure trigeminal motor neuropathy.

    Kinugawa, Kaoru / Mano, Tomoo / Nakagawa, Yosuke / Hotta, Naoki / Sugie, Kazuma

    Radiology case reports

    2022  Volume 17, Issue 12, Page(s) 4542–4545

    Abstract: Pure trigeminal motor neuropathy (PTMN) is characterized by trigeminal motor weakness without signs of trigeminal sensory dysfunction or involvement of other cranial nerves. We describe a rare case of an 83-year-old man with weakness and atrophy of the ... ...

    Abstract Pure trigeminal motor neuropathy (PTMN) is characterized by trigeminal motor weakness without signs of trigeminal sensory dysfunction or involvement of other cranial nerves. We describe a rare case of an 83-year-old man with weakness and atrophy of the right masticatory muscle without any sensory disturbance. Brain computed tomography and magnetic resonance imaging revealed atrophy and fatty infiltration of the right masticatory muscle. Electromyography revealed abnormal spontaneous activity, chronic neurogenic motor unit potentials, and reduced interference patterns in the right temporalis and the masseter muscles. The patient was diagnosed with PTMN based on the clinical symptoms and examinations. Our case presents a rare clinical manifestation with unclear etiology.
    Language English
    Publishing date 2022-09-27
    Publishing country Netherlands
    Document type Case Reports
    ZDB-ID 2406300-9
    ISSN 1930-0433
    ISSN 1930-0433
    DOI 10.1016/j.radcr.2022.09.031
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: [Secondary osteoporosis. Disordered bone metabolism in chronic kidney disease.]

    Nakagawa, Yosuke / Komaba, Hirotaka

    Clinical calcium

    2019  Volume 28, Issue 12, Page(s) 1611–1618

    Abstract: In patients with chronic kidney disease(CKD), mineral metabolism abnormalities such as hyperphosphatemia, decreased 1,25-dihydroxyvitamin D, and elevated parathyroid hormone develop as kidney function declines, which lead to vascular calcification and a ... ...

    Abstract In patients with chronic kidney disease(CKD), mineral metabolism abnormalities such as hyperphosphatemia, decreased 1,25-dihydroxyvitamin D, and elevated parathyroid hormone develop as kidney function declines, which lead to vascular calcification and a variety of skeletal abnormalities, collectively termed renal osteodystrophy. Because CKD patients have increased risk of bone fractures, it is important to assess fracture risk by measuring bone mineral density and bone metabolism markers. In addition to management of secondary hyperparathyroidism, medications for osteoporosis could be a reasonable option for preventing fracture.
    MeSH term(s) Bone Density ; Chronic Kidney Disease-Mineral and Bone Disorder ; Humans ; Hyperparathyroidism, Secondary ; Osteoporosis/etiology ; Renal Insufficiency, Chronic
    Language Japanese
    Publishing date 2019-02-05
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2386417-5
    ISSN 0917-5857
    ISSN 0917-5857
    DOI CliCa181216111618
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Impact of beta-tricalcium phosphate on preventing tooth extraction-triggered bisphosphonate-related osteonecrosis of the jaw in rats.

    Funayama, Naoki / Yagyuu, Takahiro / Imada, Mitsuhiko / Ueyama, Yoshihiro / Nakagawa, Yosuke / Kirita, Tadaaki

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 16032

    Abstract: Antiresorptive or antiangiogenic drugs can cause medication-related osteonecrosis of the jaw that is refractory. Bisphosphonate-related osteonecrosis of the jaw (BRONJ) may be caused by procedures such as tooth extraction damage the alveolar bone, ... ...

    Abstract Antiresorptive or antiangiogenic drugs can cause medication-related osteonecrosis of the jaw that is refractory. Bisphosphonate-related osteonecrosis of the jaw (BRONJ) may be caused by procedures such as tooth extraction damage the alveolar bone, release bisphosphonates (BPs) and impede healing. This study investigated strategies for BRONJ prevention and molecular mechanisms of its onset. We assessed the effectiveness of filling extraction sockets with beta-tricalcium phosphate (β-TCP). Rats were administered zoledronic acid (ZA) 1.2 mg/kg once per week for 2 weeks, and a molar was extracted. They were randomly assigned to the β-TCP group (bone defects filled with 0.01 g of β-TCP) or control group. Tissue content measurements indicated 2.2 ng of ZA per socket in the β-TCP group and 4.9 ng in the control group, confirming BP distribution and BP adsorption by β-TCP in vivo. At 4 weeks after extraction, the β-TCP group had normal mucosal coverage without inflammation. Moreover, at 8 weeks after extraction, enhanced bone healing, socket coverage, and new bone formation were observed in the β-TCP group. Connective tissue in the extraction sockets suggested that local increases in BP concentrations may suppress the local autophagy mechanisms involved in BRONJ. Filling extraction sockets with β-TCP may prevent BRONJ.
    MeSH term(s) Animals ; Rats ; Humans ; Bisphosphonate-Associated Osteonecrosis of the Jaw/etiology ; Bisphosphonate-Associated Osteonecrosis of the Jaw/prevention & control ; Dental Care ; Tooth Extraction/adverse effects ; Calcium Phosphates ; Zoledronic Acid
    Chemical Substances beta-tricalcium phosphate ; Calcium Phosphates ; Zoledronic Acid (6XC1PAD3KF)
    Language English
    Publishing date 2023-09-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-43315-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Magnesium as a Janus-faced inhibitor of calcification.

    Nakagawa, Yosuke / Komaba, Hirotaka / Fukagawa, Masafumi

    Kidney international

    2020  Volume 97, Issue 3, Page(s) 448–450

    Abstract: Vascular calcification is a life-threatening complication in patients with chronic kidney disease. Magnesium is a potent inhibitor of calcification and attracting attention as a new therapeutic candidate. ter Braake and colleagues demonstrate that ... ...

    Abstract Vascular calcification is a life-threatening complication in patients with chronic kidney disease. Magnesium is a potent inhibitor of calcification and attracting attention as a new therapeutic candidate. ter Braake and colleagues demonstrate that magnesium supplementation strikingly prevents vascular calcification in Klotho knockout mice. However, these mice also show osteomalacia, indicating that magnesium has a Janus face. Maximizing the beneficial effects of magnesium without causing bone mineralization defects is an important next challenge.
    MeSH term(s) Animals ; Calcification, Physiologic ; Humans ; Magnesium ; Mice ; Minerals ; Renal Insufficiency, Chronic ; Vascular Calcification
    Chemical Substances Minerals ; Magnesium (I38ZP9992A)
    Language English
    Publishing date 2020-02-20
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2019.11.035
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Clinical Phenotypes and the Clinical Course of Bullous Pemphigoid Receiving Dipeptidyl Pepitidase-4 Inhibitor Treatment: An Analysis of Cases in a Single Japanese Center.

    Nakagawa, Yosuke / Toyoda, Masao / Saito, Nobumichi / Kaneyama, Noriko / Shimizu, Tomomichi / Mabuchi, Tomotaka / Fukagawa, Masafumi

    Internal medicine (Tokyo, Japan)

    2022  Volume 62, Issue 12, Page(s) 1715–1722

    Abstract: Objective Several studies have shown an increased risk of bullous pemphigoid (BP) when receiving dipeptidyl pepitidase-4 inhibitor (DPP-4i) treatment. The present study explored the associations of DPP-4i treatment with the clinical phenotypes and ... ...

    Abstract Objective Several studies have shown an increased risk of bullous pemphigoid (BP) when receiving dipeptidyl pepitidase-4 inhibitor (DPP-4i) treatment. The present study explored the associations of DPP-4i treatment with the clinical phenotypes and clinical course of BP. Methods We analyzed data of 146 patients with BP at Tokai University School of Medicine from December 1, 2009, to December 31, 2021. We obtained data by a retrospective medical record review and compared the bullous pemphigoid disease area index (BPDAI) between diabetes patients receiving DPP-4i treatment and those not receiving DPP-4i treatment. We employed multivariable linear regression models to explore the association between the DPP-4i treatment and the BPDAI scores. Results Among 53 BP patients with diabetes, 33 had developed BP during treatment with DPP-4i agents, among which vildagliptin was the most frequently used. The urticaria/erythema scores of the BPDAI were significantly lower in patients who developed BP while receiving DPP-4i treatment than among others. Of note, 69.2% of the patients who stopped DPP-4i treatment experienced complete remission, and the clinical course was more favorable in patients with lower scores for urticaria/erythema than among others. Conclusion These findings suggest that, in patients who developed BP while receiving DPP-4i treatment, a noninflammatory phenotype may indicate a high likelihood that DPP-4i treatment contributes to the development of BP. The discontinuation of DPP-4i should be carefully considered in close consultation with dermatologists.
    MeSH term(s) Humans ; Diabetes Mellitus/drug therapy ; Dipeptidyl-Peptidase IV Inhibitors/adverse effects ; Disease Progression ; East Asian People ; Erythema ; Pemphigoid, Bullous/chemically induced ; Phenotype ; Retrospective Studies ; Urticaria/chemically induced
    Chemical Substances Dipeptidyl-Peptidase IV Inhibitors
    Language English
    Publishing date 2022-11-02
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 32371-8
    ISSN 1349-7235 ; 0021-5120 ; 0918-2918
    ISSN (online) 1349-7235
    ISSN 0021-5120 ; 0918-2918
    DOI 10.2169/internalmedicine.0815-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Association of serum sodium levels with fractures and mortality in patients undergoing maintenance hemodialysis.

    Soeda, Keisuke / Komaba, Hirotaka / Nakagawa, Yosuke / Kawabata, Chiaki / Wada, Takehiko / Takahashi, Hiroo / Takahashi, Yuichiro / Hyodo, Toru / Hida, Miho / Suga, Takao / Kakuta, Takatoshi / Fukagawa, Masafumi

    Journal of nephrology

    2024  

    Abstract: Background: Hyponatremia is implicated in pathological bone resorption and has been identified as a risk factor for bone fracture in the general population. However, there are limited data on the association between serum sodium levels and fracture risk ...

    Abstract Background: Hyponatremia is implicated in pathological bone resorption and has been identified as a risk factor for bone fracture in the general population. However, there are limited data on the association between serum sodium levels and fracture risk in patients undergoing hemodialysis (HD).
    Methods: We analyzed a historical cohort of 2220 maintenance HD patients to examine the association between serum sodium levels and the risk of fracture and mortality. We also examined the association between serum sodium levels and osteoporosis, based on metacarpal bone mineral density, in a subcohort of 455 patients with available data. In addition, we examined the association between serum sodium levels and bone turnover markers in a separate cross-sectional cohort of 654 maintenance HD patients.
    Results: During a median follow-up of 5.4 years, 712 patients died, 113 experienced clinical fractures, and 64 experienced asymptomatic vertebral fractures. Lower serum sodium levels were associated with an increased risk of mortality (HR 1.06 per 1 mEq/L decrease; 95% CI 1.03-1.09) but not with the risk of clinical fracture (HR 1.04 per 1 mEq/L decrease; 95% CI 0.97-1.11). A similar lack of association was observed for asymptomatic vertebral fracture and any fracture. Serum sodium levels were also not associated with osteoporosis in a subcohort with available data (n = 455) or with bone alkaline phosphatase or tartrate-resistant acid phosphatase-5b in a separate cross-sectional cohort.
    Conclusion: Serum sodium levels were associated with mortality but not with fracture risk, osteoporosis, or bone turnover markers in maintenance HD patients.
    Language English
    Publishing date 2024-03-21
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 1093991-x
    ISSN 1724-6059 ; 1120-3625 ; 1121-8428
    ISSN (online) 1724-6059
    ISSN 1120-3625 ; 1121-8428
    DOI 10.1007/s40620-024-01904-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Serum Sclerostin Levels and Mortality in Hemodialysis Patients: An 8-Year Prospective Study.

    Nakagawa, Yosuke / Komaba, Hirotaka / Wada, Takehiko / Takahashi, Hiroo / Takahashi, Yuichiro / Hyodo, Toru / Hida, Miho / Suga, Takao / Kakuta, Takatoshi / Fukagawa, Masafumi

    American journal of nephrology

    2022  Volume 53, Issue 11-12, Page(s) 767–774

    Abstract: Introduction: Sclerostin is an osteocyte-derived inhibitor of bone formation and is increased in kidney failure. Sclerostin might be involved in the pathogenesis of vascular calcification, but few studies have examined the association between sclerostin ...

    Abstract Introduction: Sclerostin is an osteocyte-derived inhibitor of bone formation and is increased in kidney failure. Sclerostin might be involved in the pathogenesis of vascular calcification, but few studies have examined the association between sclerostin and mortality in hemodialysis patients.
    Methods: We analyzed a prospective cohort of 654 patients undergoing maintenance hemodialysis. The primary exposure variable was the baseline serum sclerostin level measured at study enrollment. The primary outcome was 8-year all-cause mortality. Mortality risk was assessed using Cox regression models adjusted for potential confounders.
    Results: During a median follow-up of 7.6 years (interquartile range, 4.1-8.0 years), 229 of the 654 participants died. In a univariate analysis, serum sclerostin levels were not associated with mortality (HR per doubling, 0.94; 95% CI, 0.76-1.17). This result was unchanged after adjustment for age, sex, dialysis vintage, diabetes, prior cardiovascular disease, and body mass index (HR per doubling, 0.92; 95% CI, 0.72-1.17). Similar results were obtained for cardiovascular mortality.
    Conclusion: Serum sclerostin levels were not associated with mortality in maintenance hemodialysis patients. Further research is required to determine the role of sclerostin in vascular calcification and cardiovascular disease in kidney failure.
    MeSH term(s) Humans ; Prospective Studies ; Cardiovascular Diseases ; Genetic Markers ; Bone Morphogenetic Proteins ; Renal Dialysis/adverse effects ; Vascular Calcification/etiology ; Renal Insufficiency/complications
    Chemical Substances Genetic Markers ; Bone Morphogenetic Proteins
    Language English
    Publishing date 2022-12-27
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604540-6
    ISSN 1421-9670 ; 0250-8095
    ISSN (online) 1421-9670
    ISSN 0250-8095
    DOI 10.1159/000528795
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Examination of Suprahyoid Muscle Resection and Other Factors Affecting Swallowing Function in Patients With Advanced Oral Cancer After Surgical Resection and Reconstruction.

    Nakayama, Yohei / Yamakawa, Nobuhiro / Ueyama, Yoshihiro / Yagyuu, Takahiro / Ueda, Nobuhiro / Nakagawa, Yosuke / Takahashi, Yuka / Arikawa, Sho / Kirita, Tadaaki

    The Journal of craniofacial surgery

    2022  Volume 33, Issue 8, Page(s) e840–e844

    Abstract: Dysphagia is one of the most common adverse effects associated with oral cancer therapy and could greatly impair postoperative quality of life. The objective of this study was to analyze postoperative swallowing outcomes and factors influencing ... ...

    Abstract Dysphagia is one of the most common adverse effects associated with oral cancer therapy and could greatly impair postoperative quality of life. The objective of this study was to analyze postoperative swallowing outcomes and factors influencing postoperative swallowing function in patients with advanced oral cancer who underwent primary reconstruction after surgical resection to identify patients at risk of experiencing severe dysphagia after immediate reconstruction of surgical defects, and to determine an ideal approach to provide appropriate perioperative interventions. The swallowing status was evaluated at 4 week postoperatively using the Functional Oral Intake Scale. We also analyzed the effects of patient, tumor, surgical, and other factors on postoperative swallowing function. The study included 67 patients. At 4 weeks postoperatively, 11 patients showed reduced swallowing function, whereas 56 patients showed good swallowing function. The number of resected suprahyoid muscles (odds ratio, 1.55; 95% confidence interval, 1.03-2.32; P=0.035) was an independent factor influencing postoperative swallowing function. Thus, among patients who underwent radical resection of oral cancer with primary reconstruction, those with extensive resection of the suprahyoid muscles were at higher risk of developing postoperative dysphagia. These findings are expected to facilitate increased vigilance for dysphagia, better counseling, and appropriate rehabilitation interventions.
    MeSH term(s) Humans ; Deglutition/physiology ; Deglutition Disorders/diagnosis ; Quality of Life ; Mouth Neoplasms/surgery ; Muscles
    Language English
    Publishing date 2022-07-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1159501-2
    ISSN 1536-3732 ; 1049-2275
    ISSN (online) 1536-3732
    ISSN 1049-2275
    DOI 10.1097/SCS.0000000000008770
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