Publications by authors named "Hamamura A"

Background: Diffuse intrinsic pontine glioma (DIPG) stands as the predominant type of brainstem glioma. It is characterized by a notably brief median survival period, with the majority of patients experiencing disease progression within six months following radiation therapy. This systematic review and meta-analysis aims to assess the efficacy and safety of hypofractionated radiotherapy (HFRT) compared to conventionally fractionated radiotherapy (CFRT) in DIPG treatment.

View Article and Find Full Text PDF
Article Synopsis
  • - A 63-year-old man with adult T-cell leukemia-lymphoma received a bone marrow transplant from an unrelated donor and was later diagnosed with invasive pulmonary aspergillosis (IPA) 17 days post-transplant.
  • - He initially improved with treatment using liposomal amphotericin B, but was switched to voriconazole due to worsening kidney function, and later experienced neurological issues.
  • - The patient passed away on day 62, with an autopsy revealing fungal infection in the lungs and a ruptured cerebral aneurysm, emphasizing the need for careful monitoring of transplant patients for fungal-related complications.
View Article and Find Full Text PDF
Article Synopsis
  • Caplacizumab, a therapy for immune-mediated thrombotic thrombocytopenic purpura (iTTP), shows benefits in achieving quicker platelet counts but is linked to slower recovery of ADAMTS13 activity.
  • A study compared acute iTTP patients treated with and without caplacizumab, highlighting that those on caplacizumab took longer to normalize ADAMTS13 activity, with significant differences in inhibitor levels and antibody titers.
  • The findings suggest that while caplacizumab helps improve platelet counts faster, it may delay the recovery of ADAMTS13 due to fewer plasma exchanges and later administration of rituximab.
View Article and Find Full Text PDF

An 18-year-old man underwent allogenic bone marrow transplantation (BMT) for Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ALL). Ph+ALL relapsed 3 months after the first BMT, and the patient underwent a second BMT. However, Ph+ALL relapsed 4 months after the second BMT, and he received a haploidentical peripheral blood stem cell transplantation (haplo-PBSCT) from his father.

View Article and Find Full Text PDF

Purpose: The efficacy and safety of stereotactic body radiation therapy (SBRT) for patients with nonspine bone metastases remains in question. A systematic review and meta-analysis were performed to evaluate SBRT treatment outcomes in nonspine bone metastases.

Methods And Materials: Eligible studies were retrieved from MEDLINE, Embase, Scielo, the Cochrane Library, and annual meeting proceedings through July 6, 2023.

View Article and Find Full Text PDF

Background: In 2012, the Brazilian government launched a radiotherapy (RT) expansion plan (PER-SUS) to install 100 linear accelerators. This study assesses the development of this program after eight years.

Methods: Official reports from the Ministry of Health (MoH) were reviewed.

View Article and Find Full Text PDF
Article Synopsis
  • CAR T-cell therapy has significantly changed the treatment landscape for patients with relapsed or refractory diffuse large B-cell lymphoma (r/r DLBCL), showing promising safety and effectiveness in a recent study.
  • In a study of 21 patients, 85.7% experienced cytokine release syndrome (CRS), with a 61.9% complete response rate at 3 months and notable survival rates at the 6-month follow-up.
  • Despite 38.1% of patients having comorbidities potentially affecting treatment eligibility, these did not significantly impact response rates or adverse events, indicating the therapy's efficacy even in real-world settings.
View Article and Find Full Text PDF

This prospective phase I trial aimed to determine the recommended dose of 3-day total marrow and lymphoid irradiation (TMLI) for a myeloablative conditioning regimen by increasing the dose per fraction. The primary end-point of this single-institution dose escalation study was the recommended TMLI dose based on the frequency of dose-limiting toxicity (DLT) ≤100 days posthematopoietic stem cell transplantation (HSCT); a 3 + 3 design was used to evaluate the safety of TMLI. Three dose levels of TMLI (14/16/18 Gy in six fractions over 3 days) were set.

View Article and Find Full Text PDF

Purpose: During the COVID-19 pandemic, patients with cancer are at increased risk of not having timely diagnosis and access to cancer treatment. The present study evaluated the COVID-19 pandemic impact on radiotherapy activity in Brazil.

Methods: A national-level study was performed to evaluate the RT utilization for prostate, breast, head & neck (HN), Gynecology (GYN), Gastrointestinal (GI), lung cancers, and bone/brain metastases.

View Article and Find Full Text PDF
Article Synopsis
  • Late-onset noninfectious pulmonary complications (LONIPC) significantly contribute to health issues in patients after allogeneic hematopoietic stem cell transplantation (HSCT).
  • A study over 10.3 years involving 167 long-term HSCT survivors found a consistent decline in lung function measurements, such as vital capacity and forced expiratory volume.
  • Restrictive lung function impairment emerged as a critical risk factor for increased mortality, indicating that lung function decline affects overall survival independently of LONIPC.
View Article and Find Full Text PDF

The impact of the killer immunoglobulin-like receptor (KIR)-ligand mismatch between donor and recipient in hematopoietic stem cell transplantation is controversial. Recently, it has been suggested that their effect on cord blood transplantation (CBT) differs among types of mismatched KIR-ligand and graft-versus-host disease (GVHD) prophylaxis. To investigate their role in acute myeloid leukemia (AML), mismatch of KIR2DL1, KIR3DL1, and KIR3DL2-ligand (HLA-C2, Bw4, and A3/11) were retrospectively assessed in patients undergoing CBT with GVHD prophylaxis comprising a calcineurin inhibitor plus methotrexate (CNI/MTX) or mycophenolate mofetil (CNI/MMF).

View Article and Find Full Text PDF

Purpose: The aim was to evaluate the effect of a topical formulation containing chitosan-coated Chamomilla recutita (L.) rauschert microparticles regarding the incidence, grade, and days for the appearance of radiodermatitis (RD) in women with breast cancer.

Methods: A double-blinded, controlled, randomized, phase II clinical trial developed with women diagnosed with breast cancer who will receive radiation therapy.

View Article and Find Full Text PDF

Therapy-related myelodysplastic syndromes (t-MDS) are generally progressive and associated with poorer outcomes than de novo MDS (d-MDS). To evaluate the outcome of allogeneic hematopoietic stem cell transplantation (allo-HSCT) for t-MDS, we conducted a propensity score matched-pair analysis of patients with t-MDS and d-MDS using a nationwide database. A total of 178 patients with t-MDS underwent allo-HSCT between 2001 and 2018, and 178 out of 3123 patients with d-MDS were selected.

View Article and Find Full Text PDF

Objectives: Stereotactic ablative radiotherapy (SABR) has been reported to be an effective treatment for oligometastatic disease from different primary cancer sites. Here we assess the effectiveness and safety of SABR for oligometastatic breast cancer patients by performing a meta-analysis.

Methods: Following PRISMA and MOOSE guidelines, a systematic review and meta-analysis was performed.

View Article and Find Full Text PDF

Objectives: To assess the patterns of failure and prognostic factors in Brazilian patients with glioblastoma multiforme (GBM) treated with radiotherapy (RT) and concurrent and adjuvant temozolomide (TMZ).

Methods: Patients with diagnosed GBM post-resection received postoperative RT. TMZ was administered concurrently at 75 mg/m2/day for 28 consecutive days and adjuvant therapy at 150-200 mg/m2/day for 5 days every 28 days.

View Article and Find Full Text PDF

The aim of this study was to evaluate whether there is a relationship between bleeding response and radiotherapy dose to palliate patients with local recurrence or progression of gastric cancer (GC). To this end, we conducted a systematic review and meta-analysis of observational studies that evaluated the bleeding response in patients with GC with local recurrence or progression. A meta-regression analysis between biological effective dose (BED) and bleeding response was performed, as was subgroup analysis to evaluate the outcome by BED level and radiotherapy (RT) technique.

View Article and Find Full Text PDF

Purpose: The purpose of this study was to evaluate the treatment efficacy of stereotactic body radiotherapy (SBRT) in oligometastatic prostate cancer recurrence and to assess whether there is any relationship between biologically effective dose (BED) and local control (LC).

Materials And Methods: Eligible studies were identified on Medline, Embase, and the Cochrane Library, and the proceedings of annual meetings through May 2019 were also identified. A meta-regression analysis was performed to assess whether there is a relationship between BED and LC.

View Article and Find Full Text PDF

Purpose: To compare the treatment outcomes of a cohort of prostate cancer patients treated with conventional schedule using IMRT or 3DRT technique.

Materials And Methods: Between 2010-2017, 485 men with localized prostate cancer were treated with conventional radiotherapy schedule with a total dose ≥74Gy using IMRT (231) or 3DCRT (254). Late gastrointestinal (GI) and genitourinary (GU) toxicity were retrospectively evaluated according to modifi ed RTOG criteria.

View Article and Find Full Text PDF

Objective: To build a model to evaluate the impact of salvage radiotherapy (SRT) in men with PSA rise or persistent PSA after undergoing radical prostatectomy (RP).

Materials And Methods: The study included 107 node-negative patients treated with SRT after RP at a single institution. Patients received SRT for either prostate-specific antigen (PSA) rising, or PSA persistence after RP.

View Article and Find Full Text PDF

To visualize oxytocin in the hypothalamo-neurohypophysial system, we generated a transgenic rat that expresses the oxytocin-monomeric red fluorescent protein 1 (mRFP1) fusion gene. In the present study, we examined the age-related changes of oxytocin-mRFP1 fluorescent intensity in the posterior pituitary (PP), the supraoptic nucleus (SON) and the paraventricular nucleus (PVN) of transgenic rats. The mRFP1 fluorescent intensities were significantly increased in the PP, the SON and the PVN of 12-, 18- and 24-month-old transgenic rats in comparison with 3-month-old transgenic rats.

View Article and Find Full Text PDF

Objective: Inter-organizational coordination is important for rehabilitation disaster relief. The 2011 Great East Japan Earthquake and Disaster was unprecedented, being geographically widespread and multifaceted. Faced with the crisis, rehabilitation professionals established the 10 Rehabilitation-Related Organizations of Rehabilitation Support Service (10-RRO).

View Article and Find Full Text PDF

Seizure causes autonomic, neuroendocrine and stress responses. We examined the effects of kainic acid (KA)-induced seizures on the expression of the arginine vasopressin (AVP)-enhanced green fluorescent protein (eGFP) in the locus coeruleus (LC), an area known to contain noradrenergic cells, in AVP-eGFP transgenic male and female rats, with the rationale to identify stressors which induce AVP synthesis in the LC. Subcutaneous (s.

View Article and Find Full Text PDF

Spiropyran is a photoresponsive molecule, and nonionic spiropyran is reversibly changed by UV irradiation to a hydrophilic polar, zwitterionic merocyanine isomer, and back again by visible light irradiation. A copolymer of nitrobenzospiropyran and methyl methacrylate, poly(NSP-co-MMA) was used as a material with a photosensitive surface. UV irradiation of the photosensitive surface of poly(NSP-co-MMA)-coated glass plates decreased the water contact angles (11 +/- 1 degrees ) and increased diameter of a water drop relative to the unexposed surface.

View Article and Find Full Text PDF

Purpose: The effects of functional training on physical Activities of Daily Living (ADL) based on the Health and Medical Service Law for the Elderly have been controversial. The aim of the present study was to explore its characteristics and influence with a large sample.

Subjects And Methods: 669 participants and 1,110 non-participants in functional training were recruited from 54 cities and villages in 1998.

View Article and Find Full Text PDF