Thymosin β15 is a small actin-binding protein upregulated in highly metastatic rat prostate cancer cells, relative to low metastatic cells.
CAT No: 10-101-100
Synonyms/Alias:Thymosin β15; Tβ15; Tb15; NB thymosin; NB thymosin beta; thymosin NB; TMSB15A; thymosin-like protein 8; TMSL8; TMSNB; thymosin beta-15A; thymosin beta 15A
Thymosin β15, also known as Tβ15, is a naturally occurring peptide belonging to the β-thymosin family, which is widely distributed in mammalian tissues. Structurally, it is characterized by its highly conserved amino acid sequence and notable for its actin-binding properties. Thymosin β15 plays a pivotal role in modulating the dynamics of the cytoskeleton, particularly in processes involving cell motility and tissue remodeling. Its unique biochemical profile has attracted significant interest from researchers in fields such as cell biology, molecular signaling, and experimental therapeutics, making it a valuable tool for advanced scientific investigations.
Cell Motility and Migration: Thymosin β15 is extensively utilized in studies exploring cell motility and migration. By binding to G-actin monomers, it regulates actin polymerization, which is fundamental for cellular movement. Researchers employ Tβ15 in in vitro assays to dissect the molecular mechanisms underlying wound healing, tissue regeneration, and cancer cell invasion. Its capacity to modulate cytoskeletal rearrangement helps elucidate the pathways that govern directional cell movement, offering insights into both normal physiological processes and pathological conditions such as metastasis.
Neurobiology Research: In the field of neurobiology, Tβ15 serves as a critical tool for investigating neuronal development and neuroplasticity. Scientists leverage its actin-sequestering properties to examine how cytoskeletal dynamics influence axonal growth, synapse formation, and neural circuit remodeling. Experimental models using Thymosin β15 provide valuable data on the molecular events that underpin neuronal migration and differentiation, contributing to a deeper understanding of neurodevelopmental disorders and potential strategies for neural repair.
Tissue Engineering: Thymosin β15 is increasingly integrated into tissue engineering protocols aimed at enhancing cell proliferation and scaffold colonization. By modulating the actin cytoskeleton, it supports the migration and organization of cells within biomaterial constructs, thereby improving the structural and functional integration of engineered tissues. Researchers utilize it to optimize conditions for tissue regeneration, particularly in musculoskeletal and cardiovascular applications, where coordinated cell movement is essential for successful tissue formation.
Cancer Biology: β15-Thymosin is a focus of attention in cancer biology due to its involvement in tumor cell migration and invasion. Experimental studies often employ this peptide to explore the regulatory networks that facilitate metastatic dissemination. By influencing actin dynamics, it assists in identifying molecular targets that could potentially disrupt the invasive behavior of malignant cells. Its use in cell-based assays helps clarify the interplay between cytoskeletal remodeling and oncogenic signaling pathways, advancing the search for novel anti-metastatic strategies.
Biomarker Discovery: Thymosin β15 has demonstrated potential as a biomarker in various research contexts. Its expression patterns are analyzed in tissue samples to assess correlations with physiological states or disease progression. Researchers employ quantitative techniques to measure its levels, aiming to identify signatures that may reflect cellular activity, tissue remodeling, or pathological transformation. Through such studies, Tβ15 contributes to the ongoing development of molecular profiling approaches in both basic and translational research.
Cellular Stress Response: In addition to its primary roles, β15-Thymosin is investigated for its involvement in cellular responses to stress and injury. By modulating actin dynamics, it participates in processes such as cytoskeletal stabilization and cellular adaptation to environmental changes. Experimental models using this peptide help unravel the molecular mechanisms that enable cells to withstand and recover from various forms of stress, offering new perspectives on cellular resilience and tissue homeostasis. Through these diverse research applications, Thymosin β15 continues to serve as a versatile and indispensable tool in the advancement of cellular and molecular sciences.
The purpose of this study was to define the inhibitive effects of dietary nickel chloride (NiCl2) on thymocytes in broilers fed on diets supplemented with 0, 300, 600, and 900 mg/kg of NiCl2 for 42 days. We examined the changes of cell cycle phase, percentages of apoptotic cells, T cell subsets, cytokines, and mRNA expression of apoptotic proteins (bcl-2, bax, and caspase-3) in thymocytes by flow cytometry and quantitative real-time polymerase chain reaction (qRT-PCR). In the NiCl2-treated broilers, the percentages of thymocytes in G0/G1 phase were increased, whereas thymocytes in the S phase and the proliferation index were decreased. The percentages of apoptotic thymocytes were increased. Also, the mRNA expression levels of bax and caspase-3 were increased, and mRNA expression levels of bcl-2 were decreased. The percentages of CD3(+), CD3(+)CD4(+), and CD3(+)CD8(+) T lymphocytes in the thymus and peripheral blood were diminished. Concurrently, thymic cytokine (interleukin-1 beta (IL-1β), interleukin-2 (IL-2), interleukin-10 (IL-10), interleukin-12 p35 subunit (IL-12p35), interleukin-12 p40 subunit (IL-12p40), interleukin-21 (IL-21), interferon gamma (IFN-γ), tumor necrosis factor alpha (TNF-α), thymosin β4, thymosin β10, and thymosin β15) mRNA expression levels were decreased. The abovementioned results showed that dietary NiCl2 in excess of 300 mg/kg inhibited thymocyte growth by arresting cell cycle, increasing apoptosis percentage, altering apoptotic protein mRNA expression levels, and downregulating cytokine expression levels.
Tang, K., Guo, H., Deng, J., Cui, H., Peng, X., Fang, J., ... & Yin, S. (2015). Inhibitive effects of nickel chloride (NiCl2) on thymocytes. Biological trace element research, 164(2), 242-252.
Motile cancer cells depend on assembly and disassembly of actin filaments to extend their leading edges as they move, so alterations in the expression or properties of actin binding proteins may influence their invasiveness. Tumor cell movements might be enhanced by overexpression or activating mutations of proteins that stimulate the actin system or lower expression or inactivation of proteins that act as negative regulators of the actin system. Some transformed cells express reduced levels of tropomyosin or α-actinin, proteins that stabilize actin filaments and actin filament bundles, and restoring their expression can reverse some transformed phenotypes. On the other hand, the increased expression of thymosin β15 and gelsolin, proteins implicated in the disassembly of the actin filaments, correlates with poor clinical outcome of cancer patients.
Maul, R. S., Song, Y., Amann, K. J., Gerbin, S. C., Pollard, T. D., & Chang, D. D. (2003). EPLIN regulates actin dynamics by cross-linking and stabilizing filaments. J Cell Biol, 160(3), 399-407.
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