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Article ; Online: Mechanism of poly(

Nagasaka, Masanari / Kumaki, Fumitoshi / Yao, Yifeng / Adachi, Jun-Ichi / Mochizuki, Kenji

Physical chemistry chemical physics : PCCP

2024 Volume 26, Issue 18, Page(s) 13634–13638

Abstract: The cononsolvency mechanism of poly( ...

Abstract	The cononsolvency mechanism of poly(
Language	English
Publishing date	2024-05-08
Publishing country	England
Document type	Journal Article
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/d4cp00676c
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Article ; Online: Experimental and Theoretical Study for Core Excitation of Firefly Luciferin in Carbon K-Edge Spectra.

Kudo, Yuto / Kumaki, Fumitoshi / Nagasaka, Masanari / Adachi, Jun-Ichi / Noguchi, Yoshifumi / Koga, Nobuaki / Itabashi, Hideyuki / Hiyama, Miyabi

The journal of physical chemistry. A

2024 Volume 128, Issue 3, Page(s) 611–617

Abstract: Carbon (C) K-edge X-ray absorption spectra for firefly luciferin were measured and assigned using time-dependent density functional theoretical calculations for luciferin anion and dianion to elucidate the effect of hydroxy-group deprotonation. It was ... ...

Abstract	Carbon (C) K-edge X-ray absorption spectra for firefly luciferin were measured and assigned using time-dependent density functional theoretical calculations for luciferin anion and dianion to elucidate the effect of hydroxy-group deprotonation. It was found that the C K-edge spectra for luciferin had four characteristic peaks. The effect of deprotonation of the hydroxy group appears in the energy difference of the first and second peaks of these spectra. This energy difference is 1.0 eV at pH 7 and 2.3 eV at pH 10. The deprotonation of the hydroxy group can be distinguished based on the soft X-ray absorption spectra.
Language	English
Publishing date	2024-01-16
Publishing country	United States
Document type	Journal Article
ISSN	1520-5215
ISSN (online)	1520-5215
DOI	10.1021/acs.jpca.3c07504
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Article ; Online: Neuropil-like islands are a possible pathogenetic link between glioblastoma and gangliocytoma/ganglioglioma in a case of synchronous bilateral brain tumors.

Ishizawa, Keisuke / Adachi, Jun-Ichi / Tamaru, Jun-Ichi / Nishikawa, Ryo / Mishima, Kazuhiko / Sasaki, Atsushi

Neuropathology : official journal of the Japanese Society of Neuropathology

2023 Volume 44, Issue 2, Page(s) 126–134

Abstract: Neuropil-like islands (NIs) are a histologic hallmark of glioneuronal tumors with neuropil-like islands (GTNIs), but GTNIs are presently not considered a homogeneous entity. The essence of GTNI is likely its glial component, and NIs are now considered ... ...

Abstract	Neuropil-like islands (NIs) are a histologic hallmark of glioneuronal tumors with neuropil-like islands (GTNIs), but GTNIs are presently not considered a homogeneous entity. The essence of GTNI is likely its glial component, and NIs are now considered aberrant neuronal differentiation or metaplasia. The case we report herein is a 41-year-old woman who was synchronously affected by two brain tumors: one was a glioblastoma (glioblastoma multiforme, GBM), of isocitrate dehydrogenase (IDH)-wild type, with NIs in the left parietal lobe, and the other was histologically a composite gangliocytoma (GC)/anaplastic ganglioglioma (GG) with NIs in the right medial temporal lobe. While both tumors were genetically wild type for IDH, histone H3, and v-raf murine sarcoma viral oncogene homolog B1 (BRAF), the former tumor, but not the latter, was mutated for telomerase reverse transcriptase promoter gene (TERT). A recent systematic study using DNA methylation profiling and next-generation sequencing showed that anaplastic GG separate into other WHO tumor types, including IDH-wild-type GBM. It suggested a diagnostic scheme where an anaplastic GG is likely an IDH-wild-type GBM if it is a BRAF wild type, IDH wild type, and TERT promoter mutant tumor. The likely scenario in this patient is that the GBM results from the progression of GC/anaplastic GG due to the superimposed TERT promoter mutation and the propagation of newly generated GBM cells in the contralateral hemisphere. A systematic analysis using DNA methylation profiling and next-generation sequencing was not available in this study, but the common presence of NIs histologically noted in the two tumors could support this scenario. Although a sufficient volume of molecular and genetic testing is sine qua non for the accurate understanding of brain tumors, the importance of histologic observation cannot be overemphasized.
MeSH term(s)	Female ; Mice ; Animals ; Humans ; Adult ; Glioblastoma/complications ; Glioblastoma/genetics ; Glioblastoma/pathology ; Ganglioglioma/pathology ; Proto-Oncogene Proteins B-raf/genetics ; Ganglioneuroma/pathology ; Brain Neoplasms/complications ; Brain Neoplasms/genetics ; Brain Neoplasms/pathology ; Neuropil/pathology ; Isocitrate Dehydrogenase/genetics ; Isocitrate Dehydrogenase/metabolism ; Mutation ; Telomerase/genetics
Chemical Substances	Proto-Oncogene Proteins B-raf (EC 2.7.11.1) ; Isocitrate Dehydrogenase (EC 1.1.1.41) ; Telomerase (EC 2.7.7.49)
Language	English
Publishing date	2023-08-28
Publishing country	Australia
Document type	Case Reports
ZDB-ID	1483794-8
ISSN	1440-1789 ; 0919-6544
ISSN (online)	1440-1789
ISSN	0919-6544
DOI	10.1111/neup.12939
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Article ; Online: Clinical significance and pitfalls of human chorionic gonadotropin-related tumor markers for intracranial germinomas.

Suzuki, Tomonari / Shirahata, Mitsuaki / Adachi, Jun-Ichi / Mishima, Kazuhiko / Nishikawa, Ryo

Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery

2023 Volume 39, Issue 4, Page(s) 901–907

Abstract: Purpose: Measuring serum and cerebrospinal fluid human chorionic gonadotropin (hCG) is essential for the diagnosis of intracranial germ cell tumors. There are three types of hCG-related markers in clinical use: hCGβ, intact hCG, and total hCG. The best ... ...

Abstract	Purpose: Measuring serum and cerebrospinal fluid human chorionic gonadotropin (hCG) is essential for the diagnosis of intracranial germ cell tumors. There are three types of hCG-related markers in clinical use: hCGβ, intact hCG, and total hCG. The best marker for the diagnosis of intracranial germ cell tumors, especially germinoma, is currently unknown. This study aimed to evaluate the usefulness of these hCG-related markers. Methods: We investigated 19 serum samples obtained from 6 patients with histologically diagnosed germinoma treated in our institute. Serum hCGβ, intact hCG, and total hCG values were measured before, during, and after treatment. Samples with hCG values above the lower limits were considered positive. Results: The positivity rates of serum hCGβ, intact hCG, and total hCG were 6% (1/17), 47% (7/15), and 42% (8/19), respectively, with the latter two having significantly higher positivity rates than hCGβ (p = 0.041). Both intact and total hCGs showed similar values. The median values of hCGβ, intact hCG, and total hCG before treatment were 0.1 ng/mL, 4.6 mIU/mL, and 4.5 mIU/mL, respectively. Conclusion: Serum intact and total hCGs have higher detection rates than hCGβ in patients with germinoma using available commercial measurement tools.
MeSH term(s)	Humans ; Biomarkers, Tumor ; Clinical Relevance ; Chorionic Gonadotropin/cerebrospinal fluid ; Chorionic Gonadotropin, beta Subunit, Human/cerebrospinal fluid ; Germinoma/diagnosis ; Brain Neoplasms/diagnosis
Chemical Substances	Biomarkers, Tumor ; Chorionic Gonadotropin ; Chorionic Gonadotropin, beta Subunit, Human
Language	English
Publishing date	2023-02-06
Publishing country	Germany
Document type	Journal Article
ZDB-ID	605988-0
ISSN	1433-0350 ; 0302-2803 ; 0256-7040
ISSN (online)	1433-0350
ISSN	0302-2803 ; 0256-7040
DOI	10.1007/s00381-023-05856-w
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Zs.A 2036: Show issues

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Article ; Online: Operando time-resolved soft x-ray absorption spectroscopy for photoexcitation processes of metal complexes in solutions.

Kumaki, Fumitoshi / Nagasaka, Masanari / Fukaya, Ryo / Okano, Yasuaki / Yamashita, Shohei / Nozawa, Shunsuke / Adachi, Shin-Ichi / Adachi, Jun-Ichi

The Journal of chemical physics

2023 Volume 158, Issue 10, Page(s) 104201

Abstract: Operando time-resolved soft x-ray absorption spectroscopy (TR-SXAS) is an effective method to reveal the photochemical processes of metal complexes in solutions. In this study, we have developed the TR-SXAS measurement system for observing various ... ...

Abstract	Operando time-resolved soft x-ray absorption spectroscopy (TR-SXAS) is an effective method to reveal the photochemical processes of metal complexes in solutions. In this study, we have developed the TR-SXAS measurement system for observing various photochemical reactions in solutions by the combination of laser pump pulses with soft x-ray probe pulses from the synchrotron radiation. For the evaluation of the developed TR-SXAS system, we have measured nitrogen K-edge x-ray absorption spectroscopy (XAS) spectra of aqueous iron phenanthroline solutions during a photoinduced spin transition process. The decay process of the high spin state to the low spin state in the iron complex has been obtained from the ligand side by N K-edge XAS, and the time constant is close to that obtained from the central metal side by time-resolved Fe K-edge XAS in the previous studies.
Language	English
Publishing date	2023-03-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	3113-6
ISSN	1089-7690 ; 0021-9606
ISSN (online)	1089-7690
ISSN	0021-9606
DOI	10.1063/5.0129814
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Article: Miliary Tuberculosis during R-MPV Therapy in an Elderly Patient with Primary Central Nerve System Lymphoma: A Case Report.

Take, Yushiro / Shirahata, Mitsuaki / Sakai, Jun / Kubota, Yuichi / Suzuki, Tomonari / Adachi, Jun-Ichi / Maesaki, Shigefumi / Mishima, Kazuhiko / Nishikawa, Ryo

Case reports in oncology

2023 Volume 16, Issue 1, Page(s) 1054–1059

Abstract: Most elderly patients with tuberculosis (TB) have previously been infected ... ...

Abstract	Most elderly patients with tuberculosis (TB) have previously been infected with
Language	English
Publishing date	2023-09-29
Publishing country	Switzerland
Document type	Case Reports
ZDB-ID	2458961-5
ISSN	1662-6575
ISSN	1662-6575
DOI	10.1159/000530711
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Article: Successful Treatment of a CNS Tumor with BCOR Internal Tandem Duplication: A Case Report.

Mizuno, Reina / Sasaki, Atsushi / Suzuki, Tomonari / Adachi, Jun-Ichi / Shirahata, Mitsuaki / Nishikawa, Ryo / Mishima, Kazuhiko

NMC case report journal

2023 Volume 10, Page(s) 343–348

Abstract: A central nervous system (CNS) tumor with BCL-6 co-repressor (BCOR) internal tandem duplication (CNS tumor with BCOR ITD) is a rare tumor classified as an embryonal tumor by the World Health Organization classification (5th edition), and the prognosis is ...

Abstract	A central nervous system (CNS) tumor with BCL-6 co-repressor (BCOR) internal tandem duplication (CNS tumor with BCOR ITD) is a rare tumor classified as an embryonal tumor by the World Health Organization classification (5th edition), and the prognosis is generally poor. A successfully treated case is reported, and its treatment is discussed. A five-year-old boy presented with a one-month history of headache and vomiting. Magnetic resonance imaging showed a well-demarcated, left-frontal tumor without perifocal edema. The patient underwent complete resection without a neurological deficit. Anti-BCOR antibody showed strong immunoreactivity in tumor nuclei, and the tumor was diagnosed as a CNS tumor with BCOR ITD. The patient received craniospinal irradiation (CSI) comprising 23.4 Gy, followed by a boost to the primary site to a total dose of 30.6 Gy in daily fractions of 1.8 Gy. The chemotherapy comprised four cycles of vincristine, cyclophosphamide, and cisplatin with peripheral blood stem cell rescue. The clinical course was uneventful throughout the treatment, the tumor has not recurred for four years, and no neurological impairment was reported. CSI and multiagent chemotherapy were effective for a CNS tumor with BCOR ITD.
Language	English
Publishing date	2023-12-20
Publishing country	Japan
Document type	Case Reports
ISSN	2188-4226
ISSN	2188-4226
DOI	10.2176/jns-nmc.2023-0091
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Article ; Online: Cytopathological and histopathological features of cerebral granular cell astrocytoma: A case report.

Homma, Taku / Izu, Asami / Adachi, Jun-Ichi / Fukuoka, Masayoshi / Nishikawa, Ryo

Cytopathology : official journal of the British Society for Clinical Cytology

2021 Volume 33, Issue 1, Page(s) 132–137

Abstract: This report describes the cytological features of granular cell astrocytoma (GCA), to aid in the diagnosis of intraoperative frozen samples of brain lesions, and discuss cytological similarities and differences between GCA, two significant non-neoplastic ...

Abstract	This report describes the cytological features of granular cell astrocytoma (GCA), to aid in the diagnosis of intraoperative frozen samples of brain lesions, and discuss cytological similarities and differences between GCA, two significant non-neoplastic central nervous system lesions (brain infarction and demyelinating disorder), and three central nervous system tumours (gemistocytic astrocytoma, pleomorphic xanthoastrocytoma, and subependymal giant cell astrocytoma).
MeSH term(s)	Astrocytoma/diagnosis ; Astrocytoma/pathology ; Brain Neoplasms/diagnosis ; Brain Neoplasms/pathology ; Humans
Language	English
Publishing date	2021-10-13
Publishing country	England
Document type	Case Reports ; Journal Article
ZDB-ID	1034190-0
ISSN	1365-2303 ; 0956-5507 ; 1350-4037
ISSN (online)	1365-2303
ISSN	0956-5507 ; 1350-4037
DOI	10.1111/cyt.13063
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Zs.A 2926: Show issues

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Article ; Online: Primary intramedullary spinal cord pilocytic astrocytoma with anaplasia in an adult: illustrative case.

Kawasaki, Toshinari / Takayama, Motohiro / Kobayashi, Tamaki / Maki, Yoshinori / Shirahata, Mitsuaki / Adachi, Jun-Ichi / Homma, Taku / Ioroi, Yoshihiko

Journal of neurosurgery. Case lessons

2022 Volume 3, Issue 12

Abstract: Background: Primary intramedullary spinal cord (IMSC) pilocytic astrocytoma (PA) with anaplasia is extremely rare.: Observations: A 50-year-old man presented to our hospital with numbness of the left posterior rib region, back, and bilateral lower ... ...

Abstract	Background: Primary intramedullary spinal cord (IMSC) pilocytic astrocytoma (PA) with anaplasia is extremely rare. Observations: A 50-year-old man presented to our hospital with numbness of the left posterior rib region, back, and bilateral lower limbs. Contrast-enhanced T1-weighted magnetic resonance imaging (MRI) revealed an intramedullary lesion at T2-T3 with no contrast enhancement. The patient opted for conservative treatment. Eighteen months after the first consultation, the patient presented with slowly progressive numbness of the bilateral upper limbs, paraparesis, and dysuria, with rapid deterioration over the following 3 months. T1- and T2-weighted MRI revealed expansion of the intramedullary lesion, which extended from C7 to T5, and syringomyelia at C5-C6. Contrast-enhanced T1-weighted MRI revealed an enhancing intramedullary lesion at C7-T5. Open biopsy and C5-T5 laminectomy were performed for diagnosis and decompression. PA with anaplasia was diagnosed based on pathological and immunohistochemical findings. The patient received postoperative radiotherapy and chemotherapy. Lessons: Rapidly progressive IMSC PA with a change in contrast enhancement is extremely rare in adults. PA may undergo a spontaneous malignant transformation during its natural clinical course. In this case, the change in contrast enhancement may have been associated with the malignant transformation of the PA.
Language	English
Publishing date	2022-03-21
Publishing country	United States
Document type	Journal Article
ISSN	2694-1902
ISSN (online)	2694-1902
DOI	10.3171/CASE21702
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Article ; Online: True anaplastic oligoastrocytoma with dual genotype: illustrative case.

Mizuno, Reina / Homma, Taku / Adachi, Jun-Ichi / Mishima, Kazuhiko / Suzuki, Tomonari / Shirahata, Mitsuaki / Nishikawa, Ryo / Atushi, Sasaki

Journal of neurosurgery. Case lessons

2022 Volume 4, Issue 3, Page(s) CASE22146

Abstract: Background: The revised fourth edition of the World Health Organization classification of central nervous system tumors was published in 2016. Based on this classification, one of the infiltrating glioma entities named "oligoastrocytoma/anaplastic ... ...

Abstract	Background: The revised fourth edition of the World Health Organization classification of central nervous system tumors was published in 2016. Based on this classification, one of the infiltrating glioma entities named "oligoastrocytoma/anaplastic oligoastrocytoma" is discouraged. It is proposed that these mixed gliomas should be classified as diffuse astrocytoma/anaplastic astrocytoma or oligodendroglioma/anaplastic oligodendroglioma when analyzing their genetic alteration. Observations: A 78-year-old female underwent brain computed tomography (CT) because of a traffic accident. Cranial CT revealed a brain tumor in the left temporoparietal lobe; therefore, she was hospitalized. She underwent awake craniotomy. After the operation, she was treated with only local radiotherapy; the authors could not prescribe temozolomide, because she had had levetiracetam-induced pancytopenia. The remaining tumor neuroradiologically disappeared, and she was alive 40 months after the operation without tumor recurrence. Lessons: Histopathologically, this tumor was diagnosed as an anaplastic oligoastrocytoma with a distinct dual phenotype of astrocytoma and oligodendroglioma components. Genetically, these two components revealed astrocytoma and oligodendroglioma genotypes, respectively. Therefore, the authors considered the integrated diagnosis of the temporal tumor as a true anaplastic oligoastrocytoma with a dual genotype. Interestingly, this case also included an area composed of spindle to oval neoplastic cells that revealed intermediate genetic alterations between astrocytomas and oligodendrogliomas.
Language	English
Publishing date	2022-07-18
Publishing country	United States
Document type	Case Reports
ISSN	2694-1902
ISSN (online)	2694-1902
DOI	10.3171/CASE22146
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