The Role of Mitochondria-Targeting miRNAs in Intracerebral Hemorrhage

Exosomal MicroRNA: an Effective Strategy for the Treatment of Intracerebral Hemorrhage

Intracerebral hemorrhage is a devastating type of stroke, and its pathological mechanism is very complex. Surgical treatment can effectively treat the primary injury caused by mechanical compression of hematoma after intracerebral hemorrhage. However, there is no effective treatment for the secondary injury caused by a series of pathological processes caused by extravasation of blood components, including inflammatory response, oxidative stress, and excitotoxicity. Therefore, there is an urgent need to develop a novel treatment regimen that can reverse the secondary damage of intracerebral hemorrhage. In recent years, as a powerful biomarker, the role of microRNAs (miRNAs) in diseases has been gradually disclosed. As nanocarriers, the miRNAs delivered by exosomes have become a new treatment method and are widely used in the treatment of various diseases. In this paper, the research progress on the mechanism of exosomal miRNAs in intracerebral hemorrhage and its value in prevention, diagnosis, and prognosis is summarized, hoping to provide some reference for the application of exosomal miRNAs in clinical treatment of intracerebral hemorrhage.

Targeting microRNA methylation: Innovative approaches to diagnosing and treating hepatocellular carcinoma

Hepatocellular carcinoma (HCC) stands as the most prevalent form of primary liver cancer and is frequently linked to underlying chronic liver conditions such as hepatitis B, hepatitis C, and cirrhosis. Despite the progress achieved in the field of oncology, HCC remains a significant clinical challenge, primarily due to its typically late-stage diagnosis and the complex and multifaceted nature of its tumor biology. These factors contribute to the limited effectiveness of current treatment modalities and result in poor patient prognosis. Emerging research has underscored the vital role of microRNAs (miRNAs)-small, non-coding RNA molecules that play a pivotal part in the post-transcriptional regulation of gene expression. These miRNAs are integral to a wide array of cellular functions, including proliferation, apoptosis, and differentiation, and their dysregulation is closely associated with the pathogenesis of various cancers, notably HCC. A major focus in recent studies has been on the epigenetic regulation of miRNAs through methylation, a key mechanism that modulates gene expression. This process, involving the addition of methyl groups to CpG islands in the promoter regions of miRNA genes, can result in either gene silencing or activation, influencing the expression of oncogenes and tumor suppressor genes. Such alterations have profound implications for tumor growth, metastasis, and resistance to treatment. Evidence suggests that aberrant miRNA methylation can serve as a powerful biomarker for early detection and prognosis in HCC and may present novel opportunities for therapeutic intervention. This review aims to provide a comprehensive overview of the current landscape of miRNA methylation in HCC, elucidating its significance in the molecular mechanisms of liver cancer and examining its potential for clinical application. By exploring the diagnostic and therapeutic potential of miRNA methylation, we seek to highlight its value in enhancing personalized treatment strategies and improving patient outcomes.

MicroRNAs in meningiomas: Potential biomarkers and therapeutic targets

Meningiomas, characterized primarily as benign intracranial or spinal tumors, present distinctive challenges due to their variable clinical behavior, with certain cases exhibiting aggressive features linked to elevated morbidity and mortality. Despite their prevalence, the underlying molecular mechanisms governing the initiation and progression of meningiomas remain insufficiently understood. MicroRNAs (miRNAs), small endogenous non-coding RNAs orchestrating post-transcriptional gene expression, have garnered substantial attention in this context. They emerge as pivotal biomarkers and potential therapeutic targets, offering innovative avenues for managing meningiomas. Recent research delves into the intricate mechanisms by which miRNAs contribute to meningioma pathogenesis, unraveling the molecular complexities of this enigmatic tumor. Meningiomas, originating from arachnoid meningothelial cells and known for their gradual growth, constitute a significant portion of intracranial tumors. The clinical challenge lies in comprehending their progression, particularly factors associated with brain invasion and heightened recurrence rates, which remain elusive. This comprehensive review underscores the pivotal role of miRNAs, accentuating their potential to advance our comprehension of meningioma biology. Furthermore, it suggests promising directions for developing diagnostic biomarkers and therapeutic interventions, holding the promise of markedly improved patient outcomes in the face of this intricate and variable disease.

Mechanism and treatment of intracerebral hemorrhage focus on mitochondrial permeability transition pore

Intracerebral hemorrhage (ICH) is the second most common subtype of stroke, characterized by high mortality and a poor prognosis. Despite various treatment methods, there has been limited improvement in the prognosis of ICH over the past decades. Therefore, it is imperative to identify a feasible treatment strategy for ICH. Mitochondria are organelles present in most eukaryotic cells and serve as the primary sites for aerobic respiration and energy production. Under unfavorable cellular conditions, mitochondria can induce changes in permeability through the opening of the mitochondrial permeability transition pore (mPTP), ultimately leading to mitochondrial dysfunction and contributing to various diseases. Recent studies have demonstrated that mPTP plays a role in the pathological processes associated with several neurodegenerative diseases including Parkinson's disease, Alzheimer's disease, Huntington's disease, ischemic stroke and ischemia-reperfusion injury, among others. However, there is limited research on mPTP involvement specifically in ICH. Therefore, this study comprehensively examines the pathological processes associated with mPTP in terms of oxidative stress, apoptosis, necrosis, autophagy, ferroptosis, and other related mechanisms to elucidate the potential mechanism underlying mPTP involvement in ICH. This research aims to provide novel insights for the treatment of secondary injury after ICH.

MiRNAs as potential therapeutic targets and biomarkers for non-traumatic intracerebral hemorrhage

Non-traumatic intracerebral hemorrhage (ICH) is the most common type of hemorrhagic stroke, most often occurring between the ages of 45 and 60. Hypertension is most often the cause of ICH. Less often, atherosclerosis, blood diseases, inflammatory changes in cerebral vessels, intoxication, vitamin deficiencies, and other reasons cause hemorrhages. Cerebral hemorrhage can occur by diapedesis or as a result of a ruptured vessel. This very dangerous disease is difficult to treat, requires surgery and can lead to disability or death. MicroRNAs (miRNAs) are a class of non-coding RNAs (about 18-22 nucleotides) that are involved in a variety of biological processes including cell differentiation, proliferation, apoptosis, etc., through gene repression. A growing number of studies have demonstrated miRNAs deregulation in various cardiovascular diseases, including ICH. In addition, given that computed tomography (CT) and/or magnetic resonance imaging (MRI) are either not available or do not show clear signs of possible vessel rupture, accurate and reliable analysis of circulating miRNAs in biological fluids can help in early diagnosis for prevention of ICH and prognosis patient outcome after hemorrhage. In this review, we highlight the up-to-date findings on the deregulated miRNAs in ICH, and the potential use of miRNAs in clinical settings, such as therapeutic targets and non-invasive diagnostic/prognostic biomarker tools.

Mitochondrial Dynamics in Neurodegenerative Diseases: Unraveling the Role of Fusion and Fission Processes

Neurodegenerative diseases (NDs) are a diverse group of disorders characterized by the progressive degeneration and death of neurons, leading to a range of neurological symptoms. Despite the heterogeneity of these conditions, a common denominator is the implication of mitochondrial dysfunction in their pathogenesis. Mitochondria play a crucial role in creating biomolecules, providing energy through adenosine triphosphate (ATP) generated by oxidative phosphorylation (OXPHOS), and producing reactive oxygen species (ROS). When they're not functioning correctly, becoming fragmented and losing their membrane potential, they contribute to these diseases. In this review, we explore how mitochondria fuse and undergo fission, especially in the context of NDs. We discuss the genetic and protein mutations linked to these diseases and how they impact mitochondrial dynamics. We also look at the key regulatory proteins in fusion (MFN1, MFN2, and OPA1) and fission (DRP1 and FIS1), including their post-translational modifications. Furthermore, we highlight potential drugs that can influence mitochondrial dynamics. By unpacking these complex processes, we aim to direct research towards treatments that can improve life quality for people with these challenging conditions.

COVID-19: Mechanisms, risk factors, genetics, non-coding RNAs and neurologic impairments

The novel coronavirus infection (COVID-19) causes a severe acute illness with the development of respiratory distress syndrome in some cases. COVID-19 is a global problem of mankind to this day. Among its most important aspects that require in-depth study are pathogenesis and molecular changes in severe forms of the disease. A lot of literature data is devoted to the pathogenetic mechanisms of COVID-19. Without dwelling in detail on some paths of pathogenesis discussed, we note that at present there are many factors of development and progression. Among them, this is the direct role of both viral non-coding RNAs (ncRNAs) and host ncRNAs. One such class of ncRNAs that has been extensively studied in COVID-19 is microRNAs (miRNAs) and long non-coding RNAs (lncRNAs). Moreover, Initially, it was believed that this COVID-19 was limited to damage to the respiratory system. It has now become clear that COVID-19 affects not only the liver and kidneys, but also the nervous system. In this review, we summarized the current knowledge of mechanisms, risk factors, genetics and neurologic impairments in COVID-19. In addition, we discuss and evaluate evidence demonstrating the involvement of miRNAs and lnRNAs in COVID-19 and use this information to propose hypotheses for future research directions.

A pH-sensitive liposomal co-delivery of fingolimod and ammonia borane for treatment of intracerebral hemorrhage

Intracerebral hemorrhage (ICH) is one of the most devastating types of stroke. This study aims to develop a new drug carrier with hematoma-specific response and high property. pH-sensitive liposomes (PSL) were developed. Fingolimod with ammonia borane were encapsulated in the phospholipid vesicles to integrate two drugs for treating ICH more effectively. pH sensitive PSL-FTY720/AB was characterized for various physicochemical parameters such as shape, surface morphology, vesicle size, zeta-potential, in-vitro drug release in different pH environment, cellular toxicity, in-vivo and ex-vivo tissue accumulation. In vivo results further confirmed that drug-loading nanoparticles effectively protected against ICH-induced brain injury through synergistic effect of anti-inflammation and anti-oxidation. Collectively, the present study confirmed that PSL-FTY720/AB can be an effective, safe, and a novel alternative treatment approach in ICH.