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Sakai N, Hashimoto C, Yarimitsu S, Sawae Y, Komori M, Murakami T. A functional effect of the superficial mechanical properties of articular cartilage as a load bearing system in a sliding condition. BIOSURFACE AND BIOTRIBOLOGY 2016. [DOI: 10.1016/j.bsbt.2016.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Lavine SD, Cockroft K, Hoh B, Bambakidis N, Khalessi AA, Woo H, Riina H, Siddiqui A, Hirsch JA, Chong W, Rice H, Wenderoth J, Mitchell P, Coulthard A, Signh TJ, Phatorous C, Khangure M, Klurfan P, terBrugge K, Iancu D, Gunnarsson T, Jansen O, Muto M, Szikora I, Pierot L, Brouwer P, Gralla J, Renowden S, Andersson T, Fiehler J, Turjman F, White P, Januel AC, Spelle L, Kulcsar Z, Chapot R, Spelle L, Biondi A, Dima S, Taschner C, Szajner M, Krajina A, Sakai N, Matsumaru Y, Yoshimura S, Ezura M, Fujinaka T, Iihara K, Ishii A, Higashi T, Hirohata M, Hyodo A, Ito Y, Kawanishi M, Kiyosue H, Kobayashi E, Kobayashi S, Kuwayama N, Matsumoto Y, Miyachi S, Murayama Y, Nagata I, Nakahara I, Nemoto S, Niimi Y, Oishi H, Satomi J, Satow T, Sugiu K, Tanaka M, Terada T, Yamagami H, Diaz O, Lylyk P, Jayaraman MV, Patsalides A, Gandhi CD, Lee SK, Abruzzo T, Albani B, Ansari SA, Arthur AS, Baxter BW, Bulsara KR, Chen M, Delgado Almandoz JE, Fraser JF, Heck DV, Hetts SW, Hussain MS, Klucznik RP, Leslie-Mawzi TM, Mack WJ, McTaggart RA, Meyers PM, Mocco J, Prestigiacomo CJ, Pride GL, Rasmussen PA, Starke RM, Sunenshine PJ, Tarr RW, Frei DF, Ribo M, Nogueira RG, Zaidat OO, Jovin T, Linfante I, Yavagal D, Liebeskind D, Novakovic R, Pongpech S, Rodesch G, Soderman M, terBrugge K, Taylor A, Krings T, Orbach D, Biondi A, Picard L, Suh DC, Tanaka M, Zhang HQ. Training Guidelines for Endovascular Ischemic Stroke Intervention: An International Multi-Society Consensus Document. AJNR Am J Neuroradiol 2016; 37:E31-4. [PMID: 26892982 DOI: 10.3174/ajnr.a4766] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Uno K, Nishizawa D, Seo S, Takayama K, Matsumura S, Sakai N, Ohi K, Nabeshima T, Hashimoto R, Ozaki N, Hasegawa J, Sato N, Tanioka F, Sugimura H, Fukuda KI, Higuchi S, Ujike H, Inada T, Iwata N, Sora I, Iyo M, Kondo N, Won MJ, Naruse N, Uehara-Aoyama K, Itokawa M, Yamada M, Ikeda K, Miyamoto Y, Nitta A. The Piccolo Intronic Single Nucleotide Polymorphism rs13438494 Regulates Dopamine and Serotonin Uptake and Shows Associations with Dependence-Like Behavior in Genomic Association Study. Curr Mol Med 2016; 15:265-74. [PMID: 25817861 DOI: 10.2174/1566524015666150330145722] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 02/27/2015] [Accepted: 03/24/2015] [Indexed: 11/22/2022]
Abstract
Piccolo (PCLO) inhibits methamphetamine-induced neuropharmacological effects via modulation of dopamine (DA) uptake and regulation of the transport of synaptic vesicles in neuronal cells. Clinical studies have recently suggested that the single nucleotide polymorphism (SNP) rs13438494 in the intron 24 of the PCLO gene is associated with psychiatric disorder, in the meta-analysis of GWAS. Therefore, in this study, we attempted to evaluate the possible role of the PCLO SNP in the mechanisms of uptake of monoamines. To characterize rs13438494 in the PCLO gene, we constructed plasmids carrying either the C or A allele of the SNP and transiently transfected them into SH-SY5Y cells to analyze genetic effects on the splicing of PCLO mRNA. The C and A allele constructs produced different composition of the transcripts, indicating that the intronic SNP does affect the splicing pattern. We also transfected DA and serotonin (5-hydroxytryptamine; 5- HT) transporters into cells and analyzed their uptakes to elucidate the association to psychiatric disorders. In the cells transfected with the C allele, both the DA and 5-HT uptake were enhanced compared to the A allele. We also conducted a clinical study, in order to clarify the genetic associations. PCLO rs13438494 exhibits a relationship with the symptoms of drug dependence or related parameters, such as the age of first exposure to methamphetamine, eating disorders, tobacco dependence and fentanyl requirement. Our findings suggest that rs13438494 is associated with drug abuse and contributes to the pathogenesis of psychiatric disorders via modulation of neurotransmitter turnover.
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Shimizu K, Imamura H, Mineharu Y, Adachi H, Sakai C, Sakai N. Endovascular Treatment of Unruptured Paraclinoid Aneurysms: Single-Center Experience with 400 Cases and Literature Review. AJNR Am J Neuroradiol 2015; 37:679-85. [PMID: 26514613 DOI: 10.3174/ajnr.a4577] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/21/2015] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND PURPOSE Paraclinoid aneurysms have been increasingly treated endovascularly. The natural history of these aneurysms has gradually been elucidated. The purpose of this study was to assess the safety and efficacy of endovascular treatment for these aneurysms. MATERIALS AND METHODS We performed a retrospective review of 377 patients with 400 paraclinoid aneurysms treated between January 2006 and December 2012. Their clinical records, endovascular reports, and radiologic and clinical outcomes were analyzed. Because aneurysms ≥7 mm are at higher risk of rupture, we classified aneurysms as small (<7 mm) or large (≥7 mm). RESULTS Overall, 115 of the 400 aneurysms (28.8%) were large (≥7 mm). Thromboembolic complications were found significantly more often with large aneurysms than with small ones (7.4% vs 1.0%, P = .001). Hemorrhagic complications were found only with small aneurysms (0.7%). The 6-month morbidity rates were similar for small (1.0%) and large (0.8%) aneurysms. Immediate angiographic outcomes were similar (P = .37), whereas recurrences and retreatment occurred more frequently with large aneurysms (P = .001 and P = .007, respectively). Multivariate analysis showed that aneurysm size was the only independent predictor for recurrence (P = .005). Most recurrences (81%) were detected by scheduled angiography at 6 months. CONCLUSIONS Aneurysm size influenced the type of complication (thromboembolic or hemorrhagic) and the recurrence rate. Given the approximately 1% annual rupture rate for aneurysms ≥7 mm, analysis of our data supports the rationale of using prophylactic endovascular treatment for unruptured paraclinoid aneurysms ≥7 mm.
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Sakai N, Yabuuchi H, Kondo M, Matsuo Y, Kamitani T, Nagao M, Jinnouchi M, Yonezawa M, Kojima T, Yano Y, Honda H. Low-dose CT screening using hybrid iterative reconstruction: confidence ratings of diagnoses of simulated lesions other than lung cancer. Br J Radiol 2015; 88:20150159. [PMID: 26153902 DOI: 10.1259/bjr.20150159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the confidence ratings of diagnoses of simulated lesions other than lung cancer on low-dose screening CT with hybrid iterative reconstruction (IR). METHODS Simulated lesions (emphysema, mediastinal masses and interstitial pneumonia) in a chest phantom were scanned by a 320-row area detector CT. The scans were performed by 64-row and 160-row helical scans at various dose levels and were reconstructed by filtered back projection (FBP) and IR. Emphysema, honeycombing and reticular opacity were visually scored on a four-point scale by six thoracic radiologists. The ground-glass opacity as a percentage of total lung volume (%GGO), CT value and contrast-to-noise ratio (CNR) of mediastinal masses were calculated. These scores and values were compared between FBP and IR. Wilcoxon's signed-rank test was used (p < 0.05). Interobserver agreements were evaluated by κ statistics. RESULTS There were no significant differences in visual assessment. Interobserver agreement was almost perfect. CT values were almost equivalent between FBP and IR, whereas CNR with IR was significantly higher than that with FBP. %GGO significantly increased at low-dose levels with FBP; however, IR suppressed the elevation. CONCLUSION The confidence ratings of diagnoses of simulated lesions other than lung cancer on low-dose CT screening were not degraded with hybrid IR compared with FBP. ADVANCES IN KNOWLEDGE Hybrid IR did not degrade the confidence ratings of diagnoses on visual assessment and differential diagnoses based on CT value of mediastinal masses, and it showed the advantage of higher GGO conspicuity at low-dose level. Radiologists can analyse images of hybrid IR alone on low-dose CT screening for lung cancer.
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Uno K, Nishizawa D, Seo S, Sakai N, Ohi K, Nabeshima T, Hashimoto R, Ozaki N, Ikeda K, Miyamoto Y, Nitta A. [JSNP Excellent Presentation Award for CINP2014]. NIHON SHINKEI SEISHIN YAKURIGAKU ZASSHI = JAPANESE JOURNAL OF PSYCHOPHARMACOLOGY 2015; 35:57-58. [PMID: 26027072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Yamasaki T, Wakao S, Kawaji H, Suzuki T, Kamio Y, Amano S, Sameshima T, Sakai N, Tokuyama T, Dezawa M, Namba H. ET-67 * SUICIDE GENE THERAPY FOR GLIOMA USING MULTILINEAGE-DEFFERENTIATING STRESS ENDURING (MUSE) CELLS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou255.64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yamasaki T, Kawaji H, Kamio Y, Amano S, Sameshima T, Sakai N, Tokuyama T, Namba H. P01.22 * GENERATION OF GENETICALLY ENGINEERED INDUCED PLURIPOTENT STEM CELL-DERIVED NEURAL STEM CELLS WITHOUT USING VIRAL VECTORS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou174.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Suzuki D, Furukawa K, Aida T, Uno H, Miyauchi Y, Shimizu H, Ohtsuka M, Kato A, Yoshitomi H, Takayashiki T, Kuboki S, Takano S, Okamura D, Sakai N, Kagawa S, Miyazaki M. PP022-MON: Effects of Immunonutrition on Postoperative Complication, Stress Responses, and Cell-Mediated Immunity After Pancreaticoduodenectomy: Results from Two Randomized Controlled Studies. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50357-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wakhloo AK, Lylyk P, de Vries J, Taschner C, Lundquist J, Biondi A, Hartmann M, Szikora I, Pierot L, Sakai N, Imamura H, Sourour N, Rennie I, Skalej M, Beuing O, Bonafé A, Mery F, Turjman F, Brouwer P, Boccardi E, Valvassori L, Derakhshani S, Litzenberg MW, Gounis MJ. Surpass flow diverter in the treatment of intracranial aneurysms: a prospective multicenter study. AJNR Am J Neuroradiol 2014; 36:98-107. [PMID: 25125666 DOI: 10.3174/ajnr.a4078] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Incomplete occlusion and recanalization of large and wide-neck brain aneurysms treated by endovascular therapy remains a challenge. We present preliminary clinical and angiographic results of an experimentally optimized Surpass flow diverter for treatment of intracranial aneurysms in a prospective, multicenter, nonrandomized, single-arm study. MATERIALS AND METHODS At 24 centers, 165 patients with 190 intracranial aneurysms of the anterior and posterior circulations were enrolled. The primary efficacy end point was the percentage of intracranial aneurysms with 100% occlusion on 6-month DSA. The primary safety end point was neurologic death and any stroke through a minimum follow-up of 6 months. RESULTS Successful flow-diverter delivery was achieved in 161 patients with 186 aneurysms (98%); the mean number of devices used per aneurysm was 1.05. Clinical follow-up (median, 6 months) of 150 patients (93.2%), showed that the primary safety end point occurred in 18 subjects. Permanent neurologic morbidity and mortality were 6% and 2.7%, respectively. Morbidity occurred in 4% and 7.4% of patients treated for aneurysms of the anterior and posterior circulation, respectively. Neurologic death during follow-up was observed in 1.6% and 7.4% of patients with treated intracranial aneurysms of the anterior and posterior circulation, respectively. Ischemic stroke at ≤30 days, SAH at ≤7 days, and intraparenchymal hemorrhage at ≤7 days were encountered in 3.7%, 2.5%, and 2.5% of subjects, respectively. No disabling ischemic strokes at >30 days or SAH at >7 days occurred. New or worsening cranial nerve deficit was observed in 2.7%. Follow-up angiography available in 158 (86.8%) intracranial aneurysms showed 100% occlusion in 75%. CONCLUSIONS Clinical outcomes of the Surpass flow diverter in the treatment of intracranial aneurysms show a safety profile that is comparable with that of stent-assisted coil embolization. Angiographic results showed a high rate of intracranial aneurysm occlusion.
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Sakai N. The psychology of eating from the point of view of experimental, social, and applied psychology. PSYCHOLOGY IN RUSSIA: STATE OF ART 2014. [DOI: 10.11621/pir.2014.0102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Sakai N, Sato M, Charizanis K, Lee K, Swanson M, Nishino S. Sleep phenotype characterization of peripheral and central mouse models of myotonic dystrophy. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sakai N, Koizumi S, Yamashita S, Takehara Y, Sakahara H, Baba S, Oki Y, Hiramatsu H, Namba H. Arterial spin-labeled perfusion imaging reflects vascular density in nonfunctioning pituitary macroadenomas. AJNR Am J Neuroradiol 2013; 34:2139-43. [PMID: 23721898 DOI: 10.3174/ajnr.a3564] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Angiogenesis is very important in clinical features of pituitary adenomas. We investigated the relationship between the blood flow of nonfunctioning pituitary macroadenomas measured by arterial spin-labeled perfusion imaging and the microvessel attenuation of the tissue. MATERIALS AND METHODS Conventional MR imaging with contrast-enhanced T1WI and arterial spin-labeled perfusion imaging were performed before surgery in 11 consecutive patients with nonfunctioning pituitary macroadenomas. ROIs were drawn on the tumors, and the degrees of enhancement were calculated by dividing the signal intensity on the contrast-enhanced T1WI by that on the nonenhanced TIWI. As an index of tumor perfusion, a quantitative analysis was performed by using normalized tumor blood flow values calculated by dividing the mean value of the tumor region of interest by the mean region of interest values in the 2 cerebellar hemispheres. The relative microvessel attenuation was determined as the total microvessel wall area divided by the entire tissue area on CD-31-stained specimens. The degree of enhancement and the normalized tumor blood flow values were compared with relative microvessel attenuation. Additionally, intra- and postoperative tumor hemorrhages were visually graded. RESULTS The degree of enhancement was not correlated with relative microvessel attenuation. Statistically significant correlations were observed between normalized tumor blood flow values and relative microvessel attenuation (P < .05). At surgery, 3 cases were visually determined to be hypervascular tumors, and 1 of these cases had symptomatic postoperative hemorrhage. A statistically significant difference in normalized tumor blood flow values was observed visually between the intraoperative hypovascular and hypervascular groups (P < .05). CONCLUSIONS Arterial spin-labeled perfusion imaging reflects the vascular density of nonfunctioning pituitary macroadenomas, which may be useful in the preoperative prediction of intra- and postoperative tumor hemorrhage.
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Wakhloo A, Lylyk P, Vries JD, Biondi A, Taschner C, Hartmann M, Szikora I, Pierot L, Sakai N, Sourour N, Rennie I, Skalej M, Mery F, Turjman F, Brouwer P, Boccardi E, Gounis M, Surpass T. O-008 A New Generation of Flow Diverters for Endovascular Treatment of Intracranial Aneurysms - A Multicentre Preliminary Clinical and Angiographic Experience in 161 patients with 186 Aneurysms. J Neurointerv Surg 2013. [DOI: 10.1136/neurintsurg-2013-010870.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sakai N, Kubota Y, Shuin T. Statistically significant expression of B-myb in clinically advanced human renal-cell carcinomas. Int J Oncol 2012; 2:419-23. [PMID: 21573571 DOI: 10.3892/ijo.2.3.419] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
To find biologically critical factors for the tumor progression in human renal cell carcinoma (RCC), we examined expressions of c-myb and, c-myb homologous genes, A-myb and B-myb, in 34 primary human RCCs, normal kidneys and two metastatic tissues with Northern blot analysis. Seven cases (20%) exhibited positive B-myb expression. All 7 positive B-myb cases were associated with advanced stages and 5 of 7 cases had advanced metastasis. Interestingly, 2 metastatic tumors derived from the B-myb negative primary RCCs also exhibited B-myb expression. Statistical analysis proved that tumors with positive B-myb expression were significantly correlated with clinical stage III and IV (P<0.05). Four clinically advanced cases (12%) showed positive A-myb expression. These results suggest that B-myb gene expression might be involved in the progression of human RCCs. B-myb expression might be a good clinical marker for tumor aggressiveness and metastasis.
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Toyoda K, Sato S, Koga M, Yamamoto H, Nakagawara J, Furui E, Shiokawa Y, Hasegawa Y, Okuda S, Sakai N, Kimura K, Okada Y, Yoshimura S, Hoshino H, Uesaka Y, Nakashima T, Itoh Y, Ueda T, Nishi T, Gotoh J, Nagatsuka K, Arihiro S, Yamaguchi T, Minematsu K. Run-up to participation in ATACH II in Japan. JOURNAL OF VASCULAR AND INTERVENTIONAL NEUROLOGY 2012; 5:1-5. [PMID: 23230457 PMCID: PMC3517030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Intracerebral hemorrhage (ICH) is a major cause of morbidity and mortality in Japan. Seventeen Japanese institutions are participating in the Antihypertensive Treatment for Acute Cerebral Hemorrhage (ATACH) II Trial (ClinicalTrials.gov no. NCT01176565; UMIN 000006526). This phase III trial is designed to determine the therapeutic benefit of early intensive systolic blood pressure (BP) lowering for acute hypertension in ICH patients. This report explains the long run-up to reach the start of patient registration in ATACH II in Japan, including our preliminary study, a nationwide survey on antihypertensive treatment for acute ICH patients, a multicenter study for hyperacute BP lowering (the SAMURAI-ICH study), revision of the official Japanese label for intravenous nicardipine, and construction of the infrastructure for the trial.
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Santhi VA, Sakai N, Ahmad ED, Mustafa AM. Occurrence of bisphenol A in surface water, drinking water and plasma from Malaysia with exposure assessment from consumption of drinking water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 427-428:332-8. [PMID: 22578698 DOI: 10.1016/j.scitotenv.2012.04.041] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/16/2012] [Accepted: 04/16/2012] [Indexed: 05/15/2023]
Abstract
This study investigated the level of bisphenol A (BPA) in surface water used as potable water, drinking water (tap and bottled mineral water) and human plasma in the Langat River basin, Malaysia. BPA was present in 93% of the surface water samples at levels ranging from below limit of quantification (LOQ; 1.3 ng/L) to 215 ng/L while six fold higher levels were detected in samples collected near industrial and municipal sewage treatment plant outlets. Low levels of BPA were detected in most of the drinking water samples. BPA in tap water ranged from 3.5 to 59.8 ng/L with the highest levels detected in samples collected from taps connected to PVC pipes and water filter devices. Bottled mineral water had lower levels of BPA (3.3±2.6 ng/L) although samples stored in poor storage condition had significantly higher levels (11.3±5.3 ng/L). Meanwhile, only 17% of the plasma samples had detectable levels of BPA ranging from 0.81 to 3.65 ng/mL. The study shows that BPA is a ubiquitous contaminant in surface, tap and bottled mineral water. However, exposure to BPA from drinking water is very low and is less than 0.01% of the tolerable daily intake (TDI).
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Sakai N, Zhu L, Kurokawa A, Takeuchi H, Yano S, Yanoh T, Wada N, Taira S, Hosokai Y, Usui A, Machida Y, Saito H, Ichiyanagi Y. Synthesis of Gd2O3nanoparticles for MRI contrast agents. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1742-6596/352/1/012008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Van Sweringen H, Sakai N, Blanchard J, Schuster R, Tevar A, Edwards M, Lentsch A. Neutrophil, but not Hepatocyte, CXC Chemokine Receptor-2 is Critical to Acute Injury After Hepatic ischemia/Reperfusion. J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Sakai N, Kuboki S, Van Sweringen HL, Tevar AD, Schuster R, Blanchard J, Edwards MJ, Lentsch AB. CXCR1 deficiency does not alter liver regeneration after partial hepatectomy in mice. Transplant Proc 2011; 43:1967-70. [PMID: 21693308 DOI: 10.1016/j.transproceed.2011.03.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 02/22/2011] [Accepted: 03/09/2011] [Indexed: 01/13/2023]
Abstract
Previous studies have shown that CXC chemokines containing Glu-Leu-Arg (ELR) in their amino-terminus stimulate hepatocyte proliferation and liver regeneration after partial hepatectomy. These ELR+CXC chemokines bind to two receptors, CXCR1 and CXCR2. Previous work has shown that CXCR2 is involved in the proliferative effects of CXC chemokines. However, the function of CXCR1 during the regenerative response has not been studied. The aim of the current study was to investigate the role of CXCR1 in liver regeneration after partial hepatectomy. C57BL/6 (wild type) or CXCR1-/- mice were subjected to 70% partial hepatectomy or sham surgery and sacrificed on day 2 and 4 after operation. There were no significant differences in liver-to-body weight ratio or hepatocyte proliferation. The data suggest that CXCR1 does not mediate the proliferative effects of ELR+ CXC chemokines during liver regeneration after partial hepatectomy.
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Sakai N, Kitago Y, Takemoto K, Matsuda T, Ayabe T, Nagai T. Crystal structure analysis of the genetic encoded photosensitizer KillerRed. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311079992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Sakai N, Matsui Y, Nakayama A, Tsuda A, Yoneda M. Functional-dependent and size-dependent uptake of nanoparticles in PC12. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/304/1/012049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sakai N, Minematsu K, Hasegawa Y, Ogasawara K, Saito N, Taki W. P-028 First year results of merci embolectomy in Japan. J Neurointerv Surg 2011. [DOI: 10.1136/neurintsurg-2011-010097.62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Terao M, Sakai N, Higashiyama S, Kotobuki Y, Tanemura A, Wataya-Kaneda M, Yutsudo M, Ozono K, Katayama I. Cutaneous symptoms in a patient with cardiofaciocutaneous syndrome and increased ERK phosphorylation in skin fibroblasts. Br J Dermatol 2011; 163:881-4. [PMID: 20518782 DOI: 10.1111/j.1365-2133.2010.09875.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sakai N, Shimawaki S. Measurement of a number of indices of hand and movement angles in pianists with overuse disorders. J Hand Surg Eur Vol 2010; 35:494-8. [PMID: 20427408 DOI: 10.1177/1753193409352405] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Abduction angles of the thumb and little finger, hand span, length of thumb, middle finger and little finger were measured using radiographs of the right hand with the thumb and the little finger abducted, in a comparative study of 220 pianists with overuse disorder and 62 unaffected pianists. Overuse disorders included tenosynovitis, lateral and medial epicondylitis, forearm flexor muscle pain, distal tendinitis of the wrist extensors and flexors and intrinsic muscle pain. Hand span or other hand size parameters showed significant differences, while abduction angles showed no difference. The patients' group had smaller hand size than the controls when analyzed for tenosynovitis, epicondylitis and muscle pain. From these results we hypothesize that pianists with small hands tend to hyper-abduct and hyper-extend the thumb to attain greater hand span. Their little finger is also stiffer and the hypothenar muscle and the wrist flexors need greater strength to resist the reaction force in each piano key.
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Sakai N. Krabbe disease. DRUG FUTURE 2009. [DOI: 10.1358/dof.2009.034.11.1436083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hyogo T, Taki W, Negoro M, Takahashi A, Edura M, Hyodo A, Kobayashi S, Komiyama M, Kuwayama N, Matsumaru Y, Miyachi S, Murao K, Murayama Y, Nakahara I, Nemoto S, Sakai N, Satoh K, Sonobe M, Sugiu K, Terada T, Yoshimura S, Abe T, Itoh Y, Kiyosue H, Nagashima H, Nakamura M, Matsushima S. Japanese society of neuro-endovascular treatment specialist qualification system. Six years' experience and introduction of an animal model examination. Interv Neuroradiol 2008; 14:235-40. [PMID: 20557719 DOI: 10.1177/159101990801400302] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2008] [Accepted: 07/01/2008] [Indexed: 11/15/2022] Open
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78
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Sakai N. Momentum density of uncompensated electron spins measured by magnetic Compton scattering. Acta Crystallogr A 2008. [DOI: 10.1107/s010876730809555x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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79
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Sakai N, Morita A, Ushijima Y, Yao M, Watanabe N, Tanaka I. Crystal structure analysis of the oligo-peptide binding protein OppA complexed with peptides. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308091071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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80
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Yoshimura S, Kaku Y, Kokuzawa J, Hayashi K, Sakai N. Strategy for Prevention of Restenosis after PTA. Clinical and Basic Approaches. Interv Neuroradiol 2008; 10 Suppl 1:63-6. [PMID: 20587274 DOI: 10.1177/15910199040100s108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2004] [Accepted: 01/20/2004] [Indexed: 11/15/2022] Open
Abstract
SUMMARY Percutaneous transluminal angioplasty (PTA) has been a useful therapy to treat stenosis of cervical internal carotid artery (ICA) or vertebral artery (VA). Here we show that our clinical results regarding preventive effect of stenting on restenosis after PTA in the ICA and VA origin. We also show our experimental studies with gene transfer techniques aiming reduction of restenosis after balloon-injury in rat carotid artery. It has been reported that drug-eluting stent inhibits restenosis after coronary angioplasty. Further understanding of the mechanism of restenosis and application of these new modalities may lead to better clinical results in angioplasty of the craniocervical arteries.
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81
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Kobayashi T, Sakai N, Kobayakawa T, Akiyama S, Toda H, Saito S. Effects of Cognitive Factors on Perceived Odor Intensity in Adaptation/Habituation Processes: from 2 Different Odor Presentation Methods. Chem Senses 2007; 33:163-71. [DOI: 10.1093/chemse/bjm075] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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82
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Sakai C, Sakai N, Kuroiwa T, Ishihara H, Adachi H, Morizane A, Yano T, Kajikawa R, Yamagami H, Kobayashi J, Kondo K, Kikuchi H. Stenting for chronic total occlusion of the proximal subclavian artery. Interv Neuroradiol 2007; 13 Suppl 1:135-40. [PMID: 20566091 DOI: 10.1177/15910199070130s120] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2006] [Accepted: 01/15/2007] [Indexed: 11/16/2022] Open
Abstract
SUMMARY We report the results of 26 patients who underwent stent deployment for chronic total occlusion of proximal subclavian artery. From January 1998 to October 2005, 26 patients (18 male; mean age, 62.7 years, range 22 to 83 years), 28 lesions, underwent 29 procedures of stenting for chronic total occlusion of the proximal subclavian artery.Twenty-three patients had symptoms of claudication in their arm, no patients had subclavian steal syndrome.A brachial approach was used in 21 procedures, a femoral approach was used in five procedures, and combined femoral-brachial approach was required in three procedures. Primary stent deployment was success in 24 lesions (85.7%), and secondary procedure was success in one patient, totally 25 lesions (89.3%) were successfully treated by stenting. Procedure related complication occurred in four cases, including stent migration without symptoms in two procedures, hemianopsia on next day in a case, and TIA on unclear reason in one case. Permanent morbidity rate is 3.4% in procedure. Target lesion re-treatment required in three lesions, caused by subacute thrombosis, in-stent-restenosis, and dissection of the vessel by stent edge. The cases of subacute thrombosis and in-stent-restenosis were treated by re-PTA, and the case of dissection was treated by additional stenting. Secondary patency was 100%. We conclude that stenting for chronic total occlusion of subclavian arteries appears feasible and safe.
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83
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Abstract
Fibrocytes are supposed to be a circulating connective tissue cell progenitor, which consists of a novel population of peripheral blood cells. This distinct population of blood-borne cells shares markers of leukocytes as well as mesenchymal cells. Accumulating evidence indicates that fibrosis is characteristic of progressive chronic kidney diseases of any etiologies, resulting in kidney failure. We have uncovered that CCR7-positive fibrocytes migrate into the kidney in response to secondary lymphoid tissue chemokine (SLC/CCL21) and contribute to kidney fibrosis induced by unilateral ureteral obstruction in mice. In addition, the blockade of CCL21/CCR7 signaling by anti-CCL21 antibodies reduced kidney fibrosis, which was confirmed by a decrease in fibrosis in CCR7-null mice with concomitant reduction in macrophage recruitment along with reduced renal transcripts of monocyte chemoattractant protein-1 (MCP-1/CCL2). These findings suggest that fibrocytes dependent on CCL21/CCR7 signaling pathways contribute to the pathogenesis of kidney fibrosis, thereby providing that regulating fibrocytes may provide a novel therapeutic benefit for kidney fibrosis.
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84
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Yano T, Sakai N, Yamagami H, Kanefuji K, Kobayashi J, Adachi H, Ueno Y, Kunieda T, Morizane A, Osaka N, Kajikawa R, Sakai C, Kikuchi H. Revascularization procedure mainly by suction thrombectomy for acute cervical carotid occlusion. Interv Neuroradiol 2007; 13 Suppl 1:174-8. [PMID: 20566098 DOI: 10.1177/15910199070130s127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2006] [Accepted: 01/15/2007] [Indexed: 11/15/2022] Open
Abstract
SUMMARY In many cases, the prognosis for acute cervical carotid artery occlusion is poor. However, a standard treatment for the acute stage is not yet established. We report here the results of eight consecutive patients (mean age 71.5 years old) in which revascularization mainly by suction thrombectomy was performed under proximal protection during the acute phase. The occlusion sites were the intracranial internal carotid artery in five patients, tandem lesions of the internal carotid origin and intracranial vessel in two patients, and the common carotid artery in one patient. In addition, the subjects who received the treatment had an extent of infarction in MRI/DWI that was 1/3 or less of the internal carotid artery territory. The mean time from the onset to treatment commencement was 7.25 hours (2-28 hours). For the endovascular treatment, a guiding catheter with a balloon was used for proximal protection of the carotid artery. Revascularization was performed mainly by suction thrombectomy, and if a stenosed lesion was observed, PTA/stenting was added. Local fibrinolysis was not performed in combination with the above procedure. The treatment results were complete recanalization in three patients and partial recanalization in three patients. However, recanalization was not achieved in two patients. No hyperfusion syndrome or hemorrhagic infarction was observed postoperatively. All four patients in whom thrombi were successfully aspirated had occlusions proximal to the ophthalmic artery branch. In three of these four patients, complete recanalization was achieved. The revascularization procedure using suction thrombectomy under proximal protection was considered effective against the acute cervical carotid occlusions, in particular, those proximal to the ophthalmic artery branch.
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85
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Ishihara H, Sakai N, Kuroiwa T, Sakaguchi M, Morizane A, Sakai C, Yano T, Kajikawa R, Yamagami H, Kobayashi J. Percutaneous transluminal angioplasty and stenting for chronic total occlusion of intracranial carotid artery: a case report. Interv Neuroradiol 2006; 12:263-8. [PMID: 20569581 DOI: 10.1177/159101990601200310] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Accepted: 08/15/2006] [Indexed: 11/17/2022] Open
Abstract
SUMMARY Chronic total occlusion of cerebrovascular lesions is regarded as a contraindication to revascularization. We describe a case of chronic total occlusion of intracranial internal carotid artery that iwass successfully recanalized by endovascular treatment. A 72-year-old man who presented with slight right hemiparesis was proved to have chronic total occlusion of the left intracranial internal carotid artery. Percutaneous transluminal angioplasty/stenting was achieved using reversal of flow with the Parodi Anti-Embolic System. The present case indicates that percutaneous transluminal angioplasty/stenting can be an effective therapeutic option in selected patients with chronic total occlusion of cerebrovascular lesions.
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86
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Sawada M, Nakashima S, Banno Y, Yamakura H, Takenaka K, Shinoda J, Nishimura Y, Sakai N, Nozawa Y. Correction: Influence of Bax or Bcl-2 overexpression on the ceramide-dependent apoptosis pathway in glioma cells. Oncogene 2006. [DOI: 10.1038/sj.onc.1210105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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87
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Hara A, Wada T, Furuichi K, Sakai N, Kawachi H, Shimizu F, Shibuya M, Matsushima K, Yokoyama H, Egashira K, Kaneko S. Blockade of VEGF accelerates proteinuria, via decrease in nephrin expression in rat crescentic glomerulonephritis. Kidney Int 2006; 69:1986-95. [PMID: 16641924 DOI: 10.1038/sj.ki.5000439] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Vascular endothelial growth factor (VEGF) is a potent angiogenic factor that maintains the glomerular and peritubular capillary (PTC) network in the kidney. The soluble form of the VEGF receptor-1 (soluble fms-like tyrosine kinase 1 (sFlt-1)) is known to regulate VEGF activity by binding VEGF in the circulation. We hypothesized that VEGF may be beneficial for maintaining glomerular filtration barrier and vascular network in rats with progressive glomerulonephritis (GN). For blockade of VEGF activity in vivo, rats were transfected twice with plasmid DNA encoding the murine sFlt-1 gene into femoral muscle 3 days before and 2 weeks after the induction of antiglomerular basement membrane antibody-induced GN. Inhibition of VEGF with sFlt-1 resulted in massive urinary protein excretion, concomitantly with downregulated expression of nephrin in nephritic rats. Further, blockade of VEGF induced mild proteinuria in normal rats. Administration of sFlt-1 affected neither the infiltration of macrophages nor crescentic formation. In contrast, treatment of sFlt-1 accelerated the progression of glomerulosclerosis and interstitial fibrosis accompanied with renal dysfunction and PTC loss at day 56. VEGF may play a role in maintaining the podocyte function as well as renal vasculature, thereby protecting glomeruli and interstitium from progressive renal insults.
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88
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Horikawa Y, Morohashi T, Sano T, Sakai N, Yamada S, Sasa R. Fructooligosaccharides consumption inhibits the loss of iron from the incisor enamel surface in gastrectomized rat. Biol Trace Elem Res 2006; 112:263-71. [PMID: 17057265 DOI: 10.1385/bter:112:3:263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2005] [Revised: 11/30/1999] [Accepted: 11/21/2005] [Indexed: 11/11/2022]
Abstract
We examined the effects of fructooligosaccharides (FOS) on the reduction in the incisor iron content in gastrectomized rat. Twenty-eight 5- wk-old male Sprague-Dawley rats were divided into two groups: sham operated (bSH) and gastrectomized (bGX). After 4 wk, each group was divided into two subgroups according to the presence or absence of 7.5% FOS in the synthetic diet (SH, SH+FOS, GX, and GX+FOS). At 10 wk after surgery, the maxilla was prepared to examine the iron content of the incisor enamel surface at four points. These points corresponded to the iron content at 6, 7, 8, and 10 wk, respectively. Blood was collected to determine serum iron levels at 4 and 10 wk. The serum iron level significantly decreased at 4 and 10 wk in the GX group. At 10 wk, the level in the GX+FOS group significantly increased but did not reach that in the SH group. The iron content of the enamel surface time-dependently increased and no significant differences were seen between SH and GX+FOS at 8 and 10 wk. These results suggest that FOS consumption impaired the loss of enamel content following gastrectomy, and this effect preceded the effect on the serum iron level.
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89
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Miyake Y, Iwasaki Y, Terada R, Onishi T, Okamoto R, Sakai N, Sakaguchi K, Shiratori Y. Clinical characteristics of fulminant-type autoimmune hepatitis: an analysis of eleven cases. Aliment Pharmacol Ther 2006; 23:1347-53. [PMID: 16629940 DOI: 10.1111/j.1365-2036.2006.02894.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Although a few adult cases of fulminant-type autoimmune hepatitis have been reported, their clinical features and prognosis have remained uncertain. AIM To assess the clinical features and prognosis of patients with fulminant-type autoimmune hepatitis. METHODS Eleven patients (10%) diagnosed with fulminant-type autoimmune hepatitis in accordance with the 1999 criteria of the International Autoimmune Hepatitis Group were analysed. RESULTS All 11 patients were female, with a median age of 53 years. Five patients survived without liver transplantation, one received a liver transplantation, and five died without liver transplantation. Nine patients (82%) survived for 2 weeks or more following diagnosis, without liver transplantation. Except for the patient receiving a liver transplantation, serum total bilirubin levels measured during the clinical course were significantly higher in non-survivors than in survivors, although the accompanying serum alanine aminotransferase levels measured for the two groups were similar. Most significantly, serum total bilirubin levels in non-survivors worsened during days 8-15, while levels in survivors improved during the same period. CONCLUSIONS The short-term prognosis for patients with fulminant-type autoimmune hepatitis may be good. However, patients whose serum total bilirubin levels worsen during days 8-15 should be considered for liver transplantation.
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90
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Sakai C, Sakai N, Okada T, Kuroiwa T, Ishihara H, Morizane A, Yano T, Kikuchi H. Computed Tomography Angiography of Carotid Stent. Comparison of Various Self-expandable Stent in a Phantom Model. Interv Neuroradiol 2006; 12:189-92. [PMID: 20569629 DOI: 10.1177/15910199060120s133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2005] [Accepted: 12/15/2005] [Indexed: 11/15/2022] Open
Abstract
SUMMARY We evaluated Computed Tomography Angiography (CTA) of four different self-expandable stents in phantom model. Three stents ware made of nitinol and one was made of cobaltbased alloy. Each stent placed in plastic injector, filled with diluted iodinated contrast material, and placed on a plastic case filled with saline. CTA was performed on a four-detector CT scanner (detector collimation, 0.5mm: helical pitch 3.5). Axial and longitudinal reconstructions of CT imaging were compared with the instent attenuation. Three nitinol stents showed few artifact, and cobalt-based alloy stent was appeared artificial narrowing. In conclusion, CTA is useful for follow-up examination after carotid artery stenting (CAS) as a less invasive evaluation method.
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91
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Shimawaki S, Sakai N. Numerical and experimental analyses of the mechanical response of human fingertip pulp to loading. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)84660-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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92
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Sakai N, Shimawaki S. Mechanical response of fingertip and nail to compressive force. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)85657-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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93
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Ishigami M, Yamashita S, Sakai N, Miyauchi K, Yamamura T. Th-P15:79 New assay for remnant lipoprotein cholesterol using selective detergents and phospholipase D-clinical significance in postprandial hyperlipidemia. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82039-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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94
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Yamashita S, Sugimoto T, Hirano K, Hori M, Masuda Y, Okuno T, Uchida Y, Matsumoto K, Kawamoto T, Sakai N. Th-P15:86 Fasting serum apolipoprotein B-48 level can be a good marker of postprandial hyperlipidemia and coronary heart disease. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82046-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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95
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Sakai N, Shimawaki S. Mechanical responses and physical factors of the fingertip pulp. Appl Bionics Biomech 2006. [DOI: 10.1533/abbi.2006.0046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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96
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Yokokawa M, Yoshimura SH, Naito Y, Ando T, Yagi A, Sakai N, Takeyasu K. Fast-scanning atomic force microscopy reveals the molecular mechanism of DNA cleavage by ApaI endonuclease. ACTA ACUST UNITED AC 2006; 153:60-6. [PMID: 16948489 DOI: 10.1049/ip-nbt:20050018] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Newly developed fast-scanning atomic force microscopy (AFM) allows the dissection of molecular events such as DNA-enzyme reactions at the single-molecule level. With this novel technology, a model is proposed of the DNA cleavage reaction by a type IIP restriction endonuclease ApaI. Detailed analyses revealed that ApaI bound to DNA as a dimer and slid along DNA in a one-dimensional diffusion manner. When it encountered a specific DNA sequence, the enzyme halted for a moment to digest the DNA. Immediately after digestion, the ApaI dimer separated into two monomers, each of which remained on the DNA end and then dissociated from the DNA end. Thus, fast-scanning AFM is a powerful tool to aid the understanding of protein structures and dynamics in biological reactions at the single-molecule level in sub-seconds.
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97
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Murakami T, Sakai N, Sawae Y, Okamoto M, Ishikawa I, Kurohara Y. Time-dependent and depth-dependent compressive deformation of articular cartilage and chondrocytes. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)83853-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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98
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Sakai N, Shimawaki S. Hand motion analysis during touch-typing using VICON system with finger force plate. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)83577-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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99
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Nierman M, Rip J, Kuivenhoven J, Sakai N, Kastelein J, De Sain-Van Der Velden M, Stroes E, Prinsen B. Mo-P6:403 Enhanced APOB48 metabolism in lipoprotein lipase S447X carriers. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)80533-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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100
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Yoshida Y, Ishizawa T, Mitsuhashi Y, Kondo S, Ohta N, Sakai N. A patient with subaural arteriovenous malformation complicated by macrotia. Clin Exp Dermatol 2006; 31:151-2. [PMID: 16309524 DOI: 10.1111/j.1365-2230.2005.01958.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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