The Yamanaka factors (YFs), a set of four transcription factors, are widely studied for their ability to dedifferentiate somatic cells into a pluripotent state. In a recent study, Shen and colleagues show that transient expression of YFs in the mouse brain expands the developing cortex and prevents cognitive decline in an Alzheimer's disease (AD) model.
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http://dx.doi.org/10.1016/j.molmed.2024.11.013 | DOI Listing |
Cells
December 2024
Department of Cell Signaling, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya 467-8603, Japan.
The Hippo pathway, a kinase cascade, coordinates with many intracellular signals and mediates the regulation of the activities of various downstream transcription factors and their coactivators to maintain homeostasis. Therefore, the aberrant activation of the Hippo pathway and its associated molecules imposes significant stress on tissues and cells, leading to cancer, immune disorders, and a number of diseases. Cellular senescence, the mechanism by which cells counteract stress, prevents cells from unnecessary damage and leads to sustained cell cycle arrest.
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January 2025
Department of Medical Science and Cardiorenal Medicine, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
A 69-year-old Japanese man developed abdominal pain, purpura, proteinuria, and hematuria while receiving treatment for pulmonary tuberculosis. A skin biopsy revealed IgA-positive leukocytoclastic vasculitis, and a renal biopsy showed IgA-positive mesangial proliferative glomerulonephritis with crescent formation. Based on these findings, we diagnosed IgA vasculitis with nephritis (IgAVN) and initiated treatment.
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January 2025
Department of Nephrology and Dialysis, Tokyo Metropolitan Institute for Geriatrics and Gerontology, 35-2 Sakae-Cho, Itabashi, Tokyo, 173-0015, Japan.
Am J Pathol
January 2025
Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
Tumor-infiltrating macrophages (Mϕs), known as tumor-associated macrophages (TAMs), play a crucial role in the tumor microenvironment. Immunohistochemistry (IHC) revealed that intratumoral CD68-positive Mϕs are associated with poor prognosis and clinicopathological factors in patients with hepatocellular carcinoma (HCC). Subsequently, an indirect co-culture system involving HCC cells and peripheral blood-derived Mϕs was developed.
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December 2024
Laboratory of Reproductive Endocrinology, Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4, Kagamiyama, Higashihiroshima, Hiroshima, 7398528, Japan. Electronic address:
Sperm cells are highly susceptible to oxidative stress, which decreases their motility and fertility. However, glutathione (GSH) plays a critical role in protecting sperm cells from oxidative damage, a common byproduct of mitochondrial oxidative phosphorylation. On the other hand, GSH biosynthesis in sperm is limited by the availability of cysteine (Cys), which is inherently unstable and found at low concentrations in boar seminal plasma.
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