Takazo Tanaka

ORCID: 0000-0002-0370-0323
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About
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Research Areas
  • Sexual Differentiation and Disorders
  • Iron Metabolism and Disorders
  • Sperm and Testicular Function
  • Assisted Reproductive Technology and Twin Pregnancy
  • Hormonal and reproductive studies
  • Renal function and acid-base balance
  • Pituitary Gland Disorders and Treatments
  • Cancer, Hypoxia, and Metabolism
  • Ovarian function and disorders
  • Clinical Laboratory Practices and Quality Control
  • Adrenal and Paraganglionic Tumors
  • Urological Disorders and Treatments

University of Tsukuba
2024-2025

Ibaraki Prefectural Central Hospital
2023

Background/Objectives: Modern societal stressors have been linked to declining testosterone levels among young men, contributing somatic, psychological, and sexual health problems. Despite growing evidence suggesting a link between trace elements testosterone-related symptoms, there are only few comprehensive analyses on younger populations. This study's aim was examine how serum modulate the relationship symptom severity. Methods: cross-sectional study included 225 men seeking infertility...

10.3390/nu17050867 article EN Nutrients 2025-02-28

Abstract Purpose To investigate whether seminal plasma (SP)/serum ratios of multiple trace elements (TEs) can classify patients with male subfertility. Methods SP/serum 20 TEs (lithium, sodium, magnesium, phosphorus, sulfur, potassium, calcium, manganese, iron, cobalt, copper, zinc, arsenic, selenium, rubidium, strontium, molybdenum, cesium, barium, and thallium) were calculated for healthy volunteers ( n = 4) those consulting subfertility 245). Volunteer semen samples collected by split...

10.1002/rmb2.12584 article EN cc-by Reproductive Medicine and Biology 2024-01-01

ABSTRACT Background Inductively coupled plasma mass spectrometry (ICP‐MS) is widely used for the accurate measurement of minerals. However, its application to serum essential mineral has not been fully evaluated. The present study aimed assess performance ICP‐MS minerals by comparing measurements those obtained using standard quantification methods. Methods Cross‐sectional data were collected from 282 participants a single facility in Japan. Serum concentrations eight key minerals, namely...

10.1002/jcla.25140 article EN cc-by Journal of Clinical Laboratory Analysis 2024-12-23

Abstract Background Abdominal nonfunctional paraganglioma is rare. Malignant potential of assessed by Grading Adrenal Pheochromocytoma and Paraganglioma score genetic testing, but testing not common. We present a case abdominal whose malignant was grading adrenal pheochromocytoma succinate dehydrogenase subunit B staining alternative to testing. Case presentation A 39-year-old Japanese man had right retroperitoneal tumor without symptoms. Uptake in the shown 123 I-meta-iodobenzylguanidine...

10.1186/s13256-023-03822-3 article EN cc-by Journal of Medical Case Reports 2023-03-22
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