We have collected the most exciting new research in the field of genetics and cellular reserach.
Exosomes: Roles and Therapeutic Potential in Pain
Pain is a signal that the human body is being damaged or attacked by disease. It significantly impacts quality of life and imposes a substantial economic burden. Current analgesic drugs fail to meet clinical application standards due to limited choice, inadequate efficacy, and side effects. Consequently, the development of new treatment strategies for pain relief is essential. Pain signals are conveyed by nociceptors via the central nervous system to the brain, with cell-to-cell communication serving as a crucial step in the sensory nociceptive process. Exosomes are extracellular vesicles involved in intercellular communication, capable of transporting and delivering biological macromolecules. Growing evidence suggests that exosomes contribute significantly to the pathological processes associated with pain-related diseases. Summarizing the characteristics of exosomes and their molecular cargo under various pain conditions, along with identifying specific exosomal signatures, is essential for the early diagnosis and treatment of such diseases. This review systematically elucidates the molecular and cellular mechanisms of exosomes in pain relief and evaluates their potential therapeutic value in pain management. We aim to deepen the understanding of exosome–pain interactions, thereby laying the foundation for developing novel and promising therapeutic strategies. Furthermore, we scrutinize the current status of clinical research on exosome-mediated analgesia and dissect the prevailing technical challenges and future research directions. Our objective is to provide clear scientific guidance and a theoretical basis to facilitate the clinical translation of exosome therapies.
Mesenchymal Stem Cells-Derived Exosomes: Next-Generation Nanomedicines Toward Scarless Wound Healing
The process of wound healing is intricate and, once disrupted, results in scar formation. Scar formation has negative physiological and psychological impacts on patients in addition to impeding the restoration of skin integrity and function. Increasing evidence indicates that factors such as angiogenesis, ECM deposition, and inflammation are all associated with scar formation. Given their excellent immunomodulatory and regenerative properties, mesenchymal stem cell-derived exosomes (MSCs-Exos) are increasingly favored in inhibiting scar formation during wound healing. This review begins with a summary of the key mechanisms of wound healing and scar formation, followed by the application of MSCs-Exos in attenuating the pathological process of scar formation, as well as its potential mechanisms of action. In addition, the current status and development prospects of engineered exosomes and hydrogel-combined exosomes in scar inhibition are further discussed. Finally, we evaluate the current challenges of using exosomes for scarless wound healing, including manufacturing standardization, dosing, delivery systems, and the lack of large-scale clinical data, which hold the potential to bridge the gap between the laboratory and the clinical.
Exerkine-loaded exosomes in muscle aging: a nexus of exercise, regeneration, and crosstalk
This review examines the critical role of extracellular vesicles, specifically exosomes, as mediators of intercellular and inter-organ communication in the context of skeletal muscle aging and regeneration. Skeletal muscle, traditionally viewed as a simple contractile tissue, is now recognized as a potent endocrine organ that secretes a diverse array of signaling molecules, collectively termed “exerkines,” in response to physical activity. We integrate contemporary evidence demonstrating how exercise modulates the release and molecular composition of muscle-derived exosomes, which in turn influence key cellular processes. The report details how exosomal cargo, including non-coding RNAs and proteins, regulates muscle stem cell activation and differentiation, counteracts age-related decline (sarcopenia) by modulating protein homeostasis and inflammation, and facilitates systemic metabolic crosstalk with distant tissues such as adipose tissue. We also critically discuss the burgeoning therapeutic potential of engineered exosomes for musculoskeletal health, while highlighting significant and interconnected challenges in the field, including the lack of standardized methodologies and regulatory frameworks. This review provides a nuanced perspective on the “exerkine” hypothesis, underscoring the potential of exercise-modulated exosomes as both diagnostic biomarkers and novel therapeutic agents for maintaining lifelong muscle health.
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A Split-Scar Study: Study of Surgical Scar Using Exosomes
Background
Exosomes have emerged as a promising therapeutic agent for various dermatological conditions such as acne, atopic dermatitis, and wound healing. This study aims to evaluate exosome’s efficacy in improving postoperative scars.
Methods
Ten patients underwent revision rhinoplasty with autologous costal cartilage, each with a 3 cm anterior chest incision scar were enrolled. Scars (mean 4.3 months postoperatively) were divided into medial and lateral halves; one half was treated with ASC-Exosome (experimental) and the other with hyaluronic acid (control). Outcomes were assessed using the Vancouver Scar Scale (VSS) and the Patient and Observer Scar Assessment Scale (POSAS).
Result
The experimental side treated with ASC-Exosome demonstrated improvements compared to the control side. Pigmentation improved significantly in the Observer Scar Assessment Scale (OSAS) group from week 3 onward, though no consistent changes were observed on the VSS. Pliability showed significant improvement in both OSAS and VSS, beginning at week 3 and persisting through week 8. Relief also improved in the OSAS group from weeks 4 to 8. While no vascularity differences were detected, one-year follow-up photographs confirmed superior improvements in scar height and thickness on the exosome-treated side. Patient Scar Assessment Scale (PSAS) indicated significant improvements in scar color by week 4, stiffness by week 3, and thickness by week 2. Irregularity showed significant differences at week 4 and week 8. No significant differences were noted in pain or itching between the sides.
Conclusions
Exosomes significantly improved scar quality, particularly pigmentation, pliability, and relief, and can represent a valuable option for postoperative scar management.
Exosomes as Precise Regulators of the Osteoimmune Microenvironment: Engineering Strategies for Bone Regeneration
Bone homeostasis is a dynamically orchestrated process that is intricately regulated by the immune system. The emerging field of osteoimmunology has demonstrated that bone homeostasis and repair are governed by a sophisticated crosstalk between immune and skeletal cells, in which immune signals play a critical role in modulating osteogenesis and osteoclastogenesis. Nevertheless, conventional bone repair strategies frequently overlook immune modulation, instead prioritizing structural support or direct osteoinductive effects. Exosomes—endogenous nanovesicles characterized by low immunogenicity and high bioavailability—have emerged as potent mediators within the immune–bone axis. These vesicles mediate intercellular communication by delivering functional cargo, including miRNAs, proteins, and lipids, across biological barriers, thereby enabling precise regulation of inflammatory responses and immune cell polarization. Importantly, exosomes can reprogram the local immune microenvironment from a pro-inflammatory to a regenerative, anti-inflammatory state, thus promoting enhanced bone healing in complex clinical conditions such as osteoporosis and bone defects. This review systematically examines the molecular mechanisms through which exosomes modulate immune responses in bone biology, highlights their pivotal role in reshaping the osteoimmune microenvironment, and discusses their transformative potential in the development of next-generation, precision-based therapeutic approaches for bone regeneration.
Vitamin D Status Modulates the Regenerative Potential of Serum Exosomes: A Therapeutic Strategy for Wound Healing
Background:
Vitamin D is a critical factor in immune regulation and epithelial regeneration. Vitamin D deficiency is commonly observed in diabetic patients and is associated with impaired wound healing. Circulating exosomes transport bioactive molecules and influence cellular behavior relevant to tissue repair.
Aim:
This study aimed to investigate the capacity of serum exosomes derived from individuals with/without diabetes and with different vitamin D statuses to enhance keratinocyte-mediated wound healing.
Methods:
Serum samples were collected from diabetic patients and healthy nondiabetic controls [22 participants in total: eight healthy volunteers and 14 patients with type 2 diabetes, of whom six were vitamin D-sufficient (>20 ng/mL) and eight were vitamin D-deficient (<20 ng/mL)]. Exosomes were isolated using ExoQuick™ and quantified using the ExoView R200 platform. HaCaT keratinocytes (HaCaT cells—human immortalized keratinocytes) were subjected to a wound healing assay and treated with serum-derived exosomes or with different concentrations of 1α,25(OH)₂D₃. Expressions of cytokeratin 14, E-cadherin, and vitamin D receptor were measured using immunofluorescence.
Results:
Exosomes from vitamin D-sufficient donors enhanced keratinocyte healing, while those from deficient diabetics were ineffective. 1α,25(OH)₂D₃ promoted proliferation up to a concentration of 100 nM, with inhibition at 200 nM. This biphasic response aligns with those of previous studies and suggests a threshold beyond which calcitriol may exert feedback-inhibitory or cytostatic effects. Regenerative efficacy aligned more with vitamin D status than glycemic metrics.
Conclusion:
Vitamin D status influences the regenerative efficacy of circulating exosomes. Stratifying diabetic patients by vitamin D levels may improve the outcomes of exosome-based therapies.
Potential role of exosomes derived from the tumor microenvironment in tumor progression and treatment
Exosomes are important intercellular communication substances that connect the intercellular communication between the tumor microenvironment and the premetastatic microenvironment during tumor progression. By carrying different regulatory substances, such as proteins, cytokines, nucleic acids, etc., to regulate tumor progression, including angiogenesis, invasion, metastasis, drug resistance and other aspects. In addition to their potential as diagnostic markers, exosomes can also be used as excellent drug delivery carriers. Due to their excellent targeting and histocompatibility, exosomes have considerable application prospects in tumor therapy. This reviews recent studies on tumor-related exosomes, summarizes the mechanisms of intercellular communication and regulation of exosomes in tumor microenvironment and pre-metastasis microenvironment, and summarizes the current research progress on exosomes in tumor therapy.
Orchestrating Tumor Metastasis: Exosomes as Master Regulators of the Local and Distant Microenvironment
Metastasis remains a critical challenge in oncology and constitutes the leading cause of cancer mortality. Recent studies have revealed that exosomes are involved in every step of the cascades of tumor invasion and metastasis. Therefore, it is necessary to further investigate the exosome-mediated intercellular communication network within the tumor microenvironment to elucidate the mechanisms of cancer metastasis. This review summarizes alterations in the tumor microenvironment at primary and metastatic sites during metastasis, encompassing processes such as epithelial-mesenchymal transition (EMT) induction, extracellular matrix (ECM) remodeling, immune suppression, and angiogenesis. In addition, we examine the role of exosomes in mediating tumor drug resistance and explore the clinical translational potential of exosomes in biomarker detection, drug delivery systems, and cancer vaccines.
