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  1. Article ; Online: Biomarkers for Alzheimer’s Disease in the Current State

    Serafettin Gunes / Yumi Aizawa / Takuma Sugashi / Masahiro Sugimoto / Pedro Pereira Rodrigues

    International Journal of Molecular Sciences, Vol 23, Iss 4962, p

    A Narrative Review

    2022  Volume 4962

    Abstract: Alzheimer’s disease (AD) has become a problem, owing to its high prevalence in an aging society ...

    Abstract Alzheimer’s disease (AD) has become a problem, owing to its high prevalence in an aging society with no treatment available after onset. However, early diagnosis is essential for preventive intervention to delay disease onset due to its slow progression. The current AD diagnostic methods are typically invasive and expensive, limiting their potential for widespread use. Thus, the development of biomarkers in available biofluids, such as blood, urine, and saliva, which enables low or non-invasive, reasonable, and objective evaluation of AD status, is an urgent task. Here, we reviewed studies that examined biomarker candidates for the early detection of AD. Some of the candidates showed potential biomarkers, but further validation studies are needed. We also reviewed studies for non-invasive biomarkers of AD. Given the complexity of the AD continuum, multiple biomarkers with machine-learning-classification methods have been recently used to enhance diagnostic accuracy and characterize individual AD phenotypes. Artificial intelligence and new body fluid-based biomarkers, in combination with other risk factors, will provide a novel solution that may revolutionize the early diagnosis of AD.
    Keywords Alzheimer’s disease (AD) ; biomarkers ; low or non-invasively ; machine-learning classification ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Subject code 610
    Language English
    Publishing date 2022-04-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Enantiomeric NMR signal separation mechanism and prediction of separation behavior for a praseodymium (III) complex with (S,S)-ethylenediamine-N,N-disuccinate.

    Aizawa, Sen-Ichi / Okano, Masaru

    Magnetic resonance in chemistry : MRC

    2020  Volume 58, Issue 10, Page(s) 941–948

    Abstract: Because choice of chiral nuclear magnetic resonance (NMR) shift reagents and concentration conditions have been made empirically by trials and errors for chiral NMR analyses, the prediction of NMR signal separation behavior is an urgent issue. In this ... ...

    Abstract Because choice of chiral nuclear magnetic resonance (NMR) shift reagents and concentration conditions have been made empirically by trials and errors for chiral NMR analyses, the prediction of NMR signal separation behavior is an urgent issue. In this study, the separation of enantiomeric and enantiotopic
    Language English
    Publishing date 2020-07-08
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1475029-6
    ISSN 1097-458X ; 0749-1581
    ISSN (online) 1097-458X
    ISSN 0749-1581
    DOI 10.1002/mrc.5062
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  3. Article ; Online: TiNbSn stems with gradient changes of Young’s modulus and stiffness reduce stress shielding compared to the standard fit-and-fill stems

    Kazuyoshi Baba / Yu Mori / Daisuke Chiba / Yoshiyuki Kuwahara / Hiroaki Kurishima / Hidetatsu Tanaka / Atsushi Kogure / Masayuki Kamimura / Norikazu Yamada / Susumu Ohtsu / Masamizu Oyama / Naoya Masahashi / Shuji Hanada / Eiji Itoi / Toshimi Aizawa

    European Journal of Medical Research, Vol 28, Iss 1, Pp 1-

    2023  Volume 10

    Abstract: Abstract Background The difference between Young’s moduli of the femur and the stem causes stress ... shielding (SS). TiNbSn (TNS) stem has a low Young’s modulus and strength with gradient functional properties ...

    Abstract Abstract Background The difference between Young’s moduli of the femur and the stem causes stress shielding (SS). TiNbSn (TNS) stem has a low Young’s modulus and strength with gradient functional properties during the change in elastic modulus with heat treatment. The aim of this study was to investigate the inhibitory effect of TNS stems on SS and their clinical outcomes compared to conventional stems. Methods This study was a clinical trial. Primary THA was performed using a TNS stem from April 2016 to September 2017 for patients in the TNS group. Unilateral THA was performed using a Ti6Al4V alloy stem from January 2007 to February 2011 for patients in the control group. The TNS and Ti6Al4V stems were matched in shape. Radiographs were obtained at the 1- and 3-year follow-ups. Two surgeons independently checked the SS grade and appearance of cortical hypertrophy (CH). The Japanese Orthopaedic Association (JOA) scores before and 1 year after surgery were assessed as clinical scores. Results None of the patients in the TNS group had grade 3 or 4 SS. In contrast, in the control group, 24% and 40% of patients had grade 3 and 4 SS at the 1- and 3-year follow-ups, respectively. The SS grade was lower in the TNS group than in the control group at the 1- and 3-year follow-ups (p < 0.001). The frequencies of CH in both groups were no significant difference at the 1- and 3-year follow-ups. The JOA scores of the TNS group significantly improved at 1 year after surgery and were comparable to control group. Conclusion The TNS stem reduced SS at 1 and 3 years after THA compared to the proximal-engaging cementless stem, although the shapes of the stems matched. The TNS stem could reduce SS, stem loosening, and periprosthetic fractures. Trial registration: Current Controlled Trials. ISRCTN21241251. https://www.isrctn.com/search?q=21241251 . The date of registration was October 26, 2021. Retrospectively registered.
    Keywords TiNbSn alloy ; Total hip arthroplasty ; Stress shielding ; Low Young’s modulus ; Functionally graded characteristics ; Medicine ; R
    Subject code 796
    Language English
    Publishing date 2023-07-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Enantiomeric NMR signal separation behavior and mechanism of samarium(III) and neodymium(III) complexes with (S,S)-ethylenediamine-N,N'-disuccinate.

    Aizawa, Sen-Ichi / Okano, Masaru / Kidani, Takahiro

    Chirality

    2017  Volume 29, Issue 6, Page(s) 273–281

    Abstract: ... ...

    Abstract Enantiomeric
    Language English
    Publishing date 2017-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1011639-4
    ISSN 1520-636X ; 0899-0042
    ISSN (online) 1520-636X
    ISSN 0899-0042
    DOI 10.1002/chir.22681
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  5. Article: Chiral and Achiral Pendant-Bound Poly(biphenylylacetylene)s Bearing Amide and/or Carbamate Groups: One-Handed Helix Formations and Chiral Recognition Abilities

    Ikai, Tomoyuki / Okuda, Shogo / Aizawa, Motoki / Yashima, Eiji

    Macromolecules. 2022 Aug. 09, v. 55, no. 16

    2022  

    Abstract: A series of cis-poly(biphenylylacetylene) (PBPA) derivatives bearing chiral and achiral pendant groups at the 4′-position of the biphenyl units through an amide (−NHCO−) or carbamate (−NHCOO−) linker were synthesized by polymerization of the ... ...

    Abstract A series of cis-poly(biphenylylacetylene) (PBPA) derivatives bearing chiral and achiral pendant groups at the 4′-position of the biphenyl units through an amide (−NHCO−) or carbamate (−NHCOO−) linker were synthesized by polymerization of the corresponding biphenylylacetylene (BPA) monomers that can be readily prepared in one step from a novel amino-functionalized BPA. An excess one-handed helix induction in the PBPAs through covalent and noncovalent chiral interactions and their chiral recognition abilities when used as chiral stationary phases for high-performance liquid chromatography were investigated. PBPAs bearing optically pure l-amino acid residues showed unique two-state helical conformational changes between the extended and contracted helices regulated by the solvent-mediated on/off switching of the intramolecular hydrogen-bonding formations between the pendants or at each pendant. The chiral recognition abilities of the helical PBPAs were significantly influenced by the kinds of the pendant l-amino acid residues. The preferred-handed contracted helical PBPA carrying an l-leucine-derived pendant showed an excellent chiral resolving power toward various racemic compounds including axially and point chiral compounds and chiral metal complexes. The elution orders of some racemates were completely reversed when its helical conformation was changed to the extended helix. On the other hand, the trans-enriched nonhelical l-leucine-bound PBPA derived from its preferred-handed cis-helical PBPA and achiral pendant-bound cis-helical PBPAs induced by noncovalent chiral interactions and subsequent static memory of the helicity showed a poor and no chiral recognition, respectively.
    Keywords amino acids ; biphenyl ; high performance liquid chromatography ; hydrogen bonding ; polymerization
    Language English
    Dates of publication 2022-0809
    Size p. 7023-7031.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1491942-4
    ISSN 1520-5835 ; 0024-9297
    ISSN (online) 1520-5835
    ISSN 0024-9297
    DOI 10.1021/acs.macromol.2c01362
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Discrimination between QRS and T Waves Using a Right Parasternal Lead for S-ICD in a Patient with a Single Ventricle.

    Nishiyama, Takahiko / Kimura, Takehiro / Nishiyama, Nobuhiro / Aizawa, Yoshiyasu / Fukuda, Keiichi / Takatsuki, Seiji

    Pacing and clinical electrophysiology : PACE

    2017  Volume 40, Issue 7, Page(s) 904–907

    Abstract: The subcutaneous implantable cardioverter-defibrillator (S-ICD) is a useful option for patients ... We report a case in which a right parasternal lead placement was indicated for an S-ICD in a resuscitated ... for selecting appropriate patients with congenital heart disease for S-ICD implantations. ...

    Abstract The subcutaneous implantable cardioverter-defibrillator (S-ICD) is a useful option for patients with a single ventricle (SV) in which transvenous leads are contraindicated because of intracardiac shunts. We report a case in which a right parasternal lead placement was indicated for an S-ICD in a resuscitated patient with an SV. There were significant changes in the magnitude of R to T waves ratio in the right compared to the left parasternal lead position. Screening in the right parasternal position is effective for selecting appropriate patients with congenital heart disease for S-ICD implantations.
    Language English
    Publishing date 2017-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 424437-0
    ISSN 1540-8159 ; 0147-8389
    ISSN (online) 1540-8159
    ISSN 0147-8389
    DOI 10.1111/pace.13046
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  7. Article ; Online: Relationship between surgical R0 resectability and findings of peripancreatic vascular invasion on CT imaging after neoadjuvant S-1 and concurrent radiotherapy in patients with borderline resectable pancreatic cancer.

    Yasuta, Sho / Kobayashi, Tatsushi / Aizawa, Hidetoshi / Takahashi, Shinichiro / Ikeda, Masafumi / Konishi, Masaru / Kojima, Motohiro / Kuno, Hirofumi / Uesaka, Katsuhiko / Morinaga, Soichiro / Miyamoto, Atsushi / Toyama, Hirochika / Takakura, Norihisa / Sugimachi, Keishi / Takayama, Wataru

    BMC cancer

    2020  Volume 20, Issue 1, Page(s) 1184

    Abstract: ... after neoadjuvant S-1 with concurrent radiotherapy were studied retrospectively. Peripancreatic major ...

    Abstract Background: Borderline resectable pancreatic cancer (BRPC) is frequently associated with positive surgical margins and a poor prognosis because the tumor is in contact with major vessels. This study evaluated the relationship between the margin-negative (R0) resection rate and findings indicating peripancreatic vascular invasion on multidetector computed tomography (MDCT) imaging after neoadjuvant chemoradiotherapy (NACRT) in patients with BRPC.
    Methods: Twenty-nine BRPC patients who underwent laparotomy after neoadjuvant S-1 with concurrent radiotherapy were studied retrospectively. Peripancreatic major vessel invasion was evaluated based on the length of tumor-vessel contact on MDCT. The R0 resection rates were compared between the progression of vascular invasion (PVI) group and the non-progression of vascular invasion (NVI) group.
    Results: There were 3 patients with partial responses (10%), 25 with stable disease (86%), and 1 with progressive disease (3%) according to the RECISTv1.1 criteria. Regarding vascular invasion, 9 patients (31%) were classified as having PVI, and 20 patients (69%) were classified as having NVI. Of the 29 patients, 27 (93%) received an R0 resection, and all the PVI patients received an R0 resection (9/9; R0 resection rate = 100%) while 90% (18/20) of the NVI patients underwent an R0 resection. The exact 95% confidence interval of risk difference between those R0 resection rates was - 10.0% [- 31.7-20.4%].
    Conclusions: Patients with BRPC after NACRT achieved high R0 resection rates regardless of the vascular invasion status. BRPC patients can undergo R0 resections unless progressive disease is observed after NACRT.
    Trial registration: UMIN-CTR, UMIN000009172 . Registered 23 October 2012.
    MeSH term(s) Aged ; Female ; Humans ; Male ; Middle Aged ; Neoadjuvant Therapy/methods ; Pancreatic Neoplasms/radiotherapy ; Pancreatic Neoplasms/surgery ; Prognosis ; Tomography, X-Ray Computed/methods
    Language English
    Publishing date 2020-12-02
    Publishing country England
    Document type Journal Article
    ISSN 1471-2407
    ISSN (online) 1471-2407
    DOI 10.1186/s12885-020-07698-0
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  8. Article ; Online: Polymer-Supported Optically Active fac(S)-Tris(thiotato)rhodium(III) Complex for Sulfur-Bridging Reaction With Precious Metal Ions.

    Aizawa, Sen-Ichi / Tsubosaka, Soshi

    Chirality

    2016  Volume 28, Issue 1, Page(s) 85–91

    Abstract: The optically active mixed-ligand fac(S)-tris(thiolato)rhodium(III) complexes, ΔL -fac(S)-[Rh(aet)2 ... L-cys-N,S)](-) (aet = 2-aminoethanethiolate, L-cys = L-cysteinate) () and ΔLL -fac(S)-[Rh(aet)(L-cys ... N,S)2 ](2-) were newly prepared by the equatorial preference of the carboxyl group ...

    Abstract The optically active mixed-ligand fac(S)-tris(thiolato)rhodium(III) complexes, ΔL -fac(S)-[Rh(aet)2 (L-cys-N,S)](-) (aet = 2-aminoethanethiolate, L-cys = L-cysteinate) () and ΔLL -fac(S)-[Rh(aet)(L-cys-N,S)2 ](2-) were newly prepared by the equatorial preference of the carboxyl group in the coordinated L-cys ligand. The amide formation reaction of with 1,10-diaminodecane and polyallylamine gave the diamine-bridged dinuclear Rh(III) complex and the single-chain polymer-supported Rh(III) complex with retention of the ΔL configuration of , respectively. These Rh(III) complexes reacted with Co(III) or Co(II) to give the linear-type trinuclear structure with the S-bridged Co(III) center and the two Δ-Rh(III) terminal moieties. The polymer-supported Rh(III) complex was applied not only to the CD spectropolarimetric detection and determination of a trace of precious metal ions such as Au(III), Pt(II), and Pd(II) but also to concentration and extraction of these metal ions into the solid polymer phase. Chirality 28:85-91, 2016. © 2015 Wiley Periodicals, Inc.
    Language English
    Publishing date 2016-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1011639-4
    ISSN 1520-636X ; 0899-0042
    ISSN (online) 1520-636X
    ISSN 0899-0042
    DOI 10.1002/chir.22546
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  9. Article ; Online: Efficacy of neoadjuvant chemotherapy with docetaxel, cisplatin and S-1 for resectable locally advanced gastric cancer.

    Migita, Kazuhiro / Nashimoto, Atsushi / Yabusaki, Hiroshi / Matsuki, Atsushi / Aizawa, Masaki

    International journal of clinical oncology

    2016  Volume 21, Issue 1, Page(s) 102–109

    Abstract: ... with S-1 adjuvant chemotherapy. We investigated the efficacy of neoadjuvant chemotherapy consisting ... of docetaxel, cisplatin and S-1 (DCS).: Methods: We retrospectively reviewed 59 patients who underwent ... December 2013 at Niigata Cancer Center Hospital. The patients received S-1 (40 mg/m(2) bid) on days 1-14 ...

    Abstract Background: The prognosis for locally advanced gastric cancer (AGC) remains unsatisfactory, even with S-1 adjuvant chemotherapy. We investigated the efficacy of neoadjuvant chemotherapy consisting of docetaxel, cisplatin and S-1 (DCS).
    Methods: We retrospectively reviewed 59 patients who underwent neoadjuvant DCS therapy for clinical stage III tumors or serosa-positive tumors between January 2009 and December 2013 at Niigata Cancer Center Hospital. The patients received S-1 (40 mg/m(2) bid) on days 1-14, and docetaxel (35 mg/m(2)) and cisplatin (35 mg/m(2)) on days 1 and 15 every 4 weeks.
    Results: Forty-three patients (72.9 %) received two courses of DCS therapy, while 16 patients (27.1 %) received one course of treatment. The clinical response rate of the primary tumor was 74.6 %, and the disease control rate was 100 %. A pathological response, defined as one-third or more of the affected tumor, was observed in 71.2 % of patients. The common grade 3/4 adverse events from chemotherapy were leucopenia (16.9 %), neutropenia (44.1 %), febrile neutropenia (8.5 %), anemia (10.2 %), anorexia (8.5 %) and nausea (6.8 %). Postoperative complications occurred in 11 patients (18.6 %). There was no treatment-related mortality or reoperation. The 3- and 5-year overall survival rates were 88 and 68.6 %, respectively. Clinical responders had a significantly higher survival rate than non-responders. Multivariate analysis identified clinical response as the only independent prognostic factor.
    Conclusions: Neoadjuvant DCS therapy demonstrated a very high clinical and pathological response rate with acceptable toxicities. Therefore, this therapy may improve the prognosis of locally AGC.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Anemia/chemically induced ; Anorexia/chemically induced ; Antineoplastic Combined Chemotherapy Protocols/adverse effects ; Antineoplastic Combined Chemotherapy Protocols/therapeutic use ; Chemotherapy, Adjuvant/adverse effects ; Cisplatin/administration & dosage ; Drug Combinations ; Febrile Neutropenia/chemically induced ; Female ; Gastrectomy/adverse effects ; Humans ; Male ; Middle Aged ; Nausea/chemically induced ; Neoadjuvant Therapy/adverse effects ; Neoplasm Staging ; Oxonic Acid/administration & dosage ; Prognosis ; Retrospective Studies ; Stomach Neoplasms/pathology ; Stomach Neoplasms/therapy ; Survival Rate ; Taxoids/administration & dosage ; Tegafur/administration & dosage
    Chemical Substances Drug Combinations ; Taxoids ; S 1 (combination) (150863-82-4) ; Tegafur (1548R74NSZ) ; docetaxel (15H5577CQD) ; Oxonic Acid (5VT6420TIG) ; Cisplatin (Q20Q21Q62J)
    Language English
    Publishing date 2016-02
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1400227-9
    ISSN 1437-7772 ; 1341-9625
    ISSN (online) 1437-7772
    ISSN 1341-9625
    DOI 10.1007/s10147-015-0851-2
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  10. Article ; Online: HPLC Separation of Sulforaphane Enantiomers in Broccoli and Its Sprouts by Transformation into Diastereoisomers Using Derivatization with (S)-Leucine.

    Okada, Makiko / Yamamoto, Atsushi / Aizawa, Sen-Ichi / Taga, Atsushi / Terashima, Hiroyuki / Kodama, Shuji

    Journal of agricultural and food chemistry

    2016  Volume 65, Issue 1, Page(s) 244–250

    Abstract: Racemic sulforaphane, which was derivatized with (S)-leucine (l-leucine), was resolved by reversed ... The S/R ratios of sulforaphane in broccoli samples were 1.5-2.6/97.4-98.5% for florets and 5.0-12.1/87.9 ... 95.0% for stems. The S/R ratios in broccoli sprout samples were higher than those in broccoli samples ...

    Abstract Racemic sulforaphane, which was derivatized with (S)-leucine (l-leucine), was resolved by reversed phase HPLC with UV detection. The optimum mobile phase conditions were found to be 10 mM citric acid (pH 2.8) containing 22% methanol at 35 °C using detection at 254 nm. Sulforaphane enantiomers in florets and stems of five brands of broccoli and leaves and stems of three brands of broccoli sprouts were analyzed by the proposed HPLC method. Both sulforaphane enantiomers were detected in all of the samples. The S/R ratios of sulforaphane in broccoli samples were 1.5-2.6/97.4-98.5% for florets and 5.0-12.1/87.9-95.0% for stems. The S/R ratios in broccoli sprout samples were higher than those in broccoli samples and were found to be 8.3-19.7/80.3-91.7% for leaves and 37.0-41.8/58.2-63.0% for stems. (S)-Sulforaphane detected in the broccoli and its sprout samples was positively identified by separately using an HPLC with a chiral column (Chiralpak AD-RH) and mass spectrometry.
    MeSH term(s) Brassica/chemistry ; Brassica/growth & development ; Chromatography, High Pressure Liquid/methods ; Isothiocyanates/chemistry ; Isothiocyanates/isolation & purification ; Leucine/chemistry ; Plant Leaves/chemistry ; Plant Leaves/growth & development ; Plant Stems/chemistry ; Plant Stems/growth & development ; Seedlings/chemistry ; Seedlings/growth & development ; Stereoisomerism
    Chemical Substances Isothiocyanates ; sulforaphane (GA49J4310U) ; Leucine (GMW67QNF9C)
    Language English
    Publishing date 2016-12-27
    Publishing country United States
    Document type Evaluation Study ; Journal Article
    ZDB-ID 241619-0
    ISSN 1520-5118 ; 0021-8561
    ISSN (online) 1520-5118
    ISSN 0021-8561
    DOI 10.1021/acs.jafc.6b04966
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