The emerging role of ferroptosis in inflammation

Synergistic effects of AgNPs and zileuton on PCOS via ferroptosis and inflammation mitigation

BACKGROUND

The most prevalent endocrine disorder affecting women is PCOS. Programmed death of ovarian cells has yet to be elucidated. Ferroptosis is a kind of iron-dependent necrosis featured by significantly Fe+2-dependent lipid peroxidation. The ongoing study aimed to reinforce fertility by combining therapy with AgNPs and (Zileuton) in PCOS rats' model.

METHODS

The study included 75 adult female rats divided into 5 groups; control, PCOS, PCOS treated with AgNPs, PCOS treated with Zileuton, and PCOS group treated with AgNPs and Zileuton. The study investigated the anti-ferroptotic, anti-inflammatory, antioxidant, antiapoptotic, histopathological and immunohistochemical examinations of COX-2 and VEGF.

RESULTS

The combination of AgNPs and Zileuton showed significant reduction of inflammatory mediators (IL-6, TNF-α, NFk-B) compared with diseased group (P-value < 0.05), regression of ferroptosis marks (Panx1 and TLR4 expression, Fe+2 levels) compared with diseased group (P-value < 0.05), depression of apoptotic marker caspase 3 level compared with diseased animals (P-value < 0.05), depression of MDA level, elevation of HO-1, GPx4 activity, and reduction of Cox2 and VEGF as compared with the diseased, AgNPs or zileuton-treated groups (P-value < 0.05).

CONCLUSION

The study showed that the combination of AgNPs and zileuton guards against, inflammation, apoptosis, and ferroptosis in PCO.

Ru single-atom nanozymes targeting ROS-ferroptosis pathways for enhanced endometrial regeneration in intrauterine adhesion therapy

Intrauterine adhesion (IUA) presents a significant challenge in gynecology, characterized by excessive fibrosis and compromised reproductive function, leading to severe infertility. Although biocompatible hydrogels integrated with stem cells offer a promising approach for IUA therapy, clinical applications remain limited. Recent studies have highlighted the role of ferroptosis and reactive oxygen species (ROS) in IUA pathogenesis, yet strategies targeting ferroptosis through antioxidant stress are underexplored. This study investigates the therapeutic effects and mechanisms of a Ru-Single-Atom Nanozyme (Ru-SAN) incorporated into chitosan hydrogel for treating IUA. Ru-SAN, which mimics the enzyme activities of catalase, superoxide dismutase, and glutathione peroxidase, effectively clears excess ROS and shows promise in treating oxidative stress-induced diseases. The results demonstrate the superior antioxidative capabilities of Ru-SAN, significantly suppressing the ROS-ferroptosis cycle at the injury site. This creates a favorable microenvironment for post-injury repair by inhibiting inflammation, enhancing mesenchymal-to-epithelial transformation, promoting angiogenesis, and polarizing M2 macrophages. Importantly, it mitigates adverse repair outcomes from inflammation and excessive collagen fiber deposition, ultimately restoring uterine glandular structures and thickness, thereby achieving the ultimate goal of restoring fertility and live birth rates. In conclusion, our study delineates a pioneering therapeutic approach leveraging the antioxidant properties of Ru-SAN to target ferroptosis, thereby offering an efficacious treatment for IUA.

Ferroptosis, from the virus point of view: opportunities and challenges

Ferroptosis is a new type of cell death, which is mainly dependent on the formation and accumulation of reactive oxygen species and lipid peroxides mediated by iron. It is distinct from other forms of regulation of cell death in morphology, immunology, biochemistry, and molecular biology. Various cell death mechanisms have been observed in many viral infections, and virus-induced cell death has long been considered as a double-edged sword that can inhibit or aggravate viral infections. However, understanding of the role of ferroptosis in various viral infections is limited. Special attention will be paid to the mechanisms of ferroptosis in mediating viral infection and antiviral treatment associated with ferroptosis. In this paper, we outlined the mechanism of ferroptosis. Additionally, this paper also review research on ferroptosis from the perspective of the virus, discussed the research status of ferroptosis in virus infection and classified and summarized research on the interaction between viral infections and ferroptosis.

A lipidomic approach towards identifying the effects of fragrance hydroperoxides on keratinocytes

BACKGROUND

Limonene and linalool are used in cosmetic products for their floral scents, but their oxidation products are strong contact allergens whose mechanisms of action are still not fully understood.

OBJECTIVES

The effects of limonene hydroperoxide (Lim-2-OOH) and linalool hydroperoxides (Lin-6/7-OOH) on the lipid profile of a human keratinocyte cell line (HaCaT) were evaluated. 2,4-Dinitrofluorobenzene (DNFB) was also included.

METHODS

Lim-2-OOH and Lin-6/7-OOH were synthesised according to previous methods. HaCaT cells were treated with allergens (10 μM) for 24 h and the cellular lipid extracts were analysed by C18 liquid chromatography with tandem mass spectrometry (LC-MS/MS). Data analysis was performed using Lipostar software. Statistical analysis was carried out using Metaboanalyst and R software.

RESULTS

All three sensitisers used caused significant changes in the lipidome of HaCaT cells in a similar trend. There was an upregulation in several plasmanyl/plasmenyl phospholipids (O-/P-phosphatidylcholines [PC] and O-/P-phosphatidylethanolamines [PE]), sphingolipids (HexCer) and triacylglycerol lipid species, and a decrease in some polyunsaturated fatty acids-containing phospholipid (PE and PC) species suggesting oxidative stress and inflammation.

CONCLUSIONS

This study is the first to evaluate the plasticity of the HaCaT cell lipidome in response to allylic hydroperoxide allergens Lim-2-OOH and Lin-6/7-OOH, together with the experimental contact allergen DNFB. These allergens are able to upregulate and downregulate certain lipid classes to a varying degree.

Cell death crosstalk in respiratory diseases: unveiling the relationship between pyroptosis and ferroptosis in asthma and COPD

Asthma and chronic obstructive pulmonary disease (COPD) are heterogeneous obstructive diseases characterized by airflow limitations and are recognized as significant contributors to fatality all over the globe. Asthma accounts for about 4, 55,000 deaths, and COPD is the 3rd leading contributor of mortality worldwide. The pathogenesis of these two obstructive disorders is complex and involves numerous mechanistic pathways, including inflammation-mediated and non-inflammation-mediated pathways. Among all the pathological categorizations, programmed cell deaths (PCDs) play a dominating role in the progression of these obstructive diseases. The two major PCDs that are involved in structural and functional remodeling in the progression of asthma and COPD are Pyroptosis and Ferroptosis. Pyroptosis is a PCD mechanism mediated by the activation of the Nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3 (NLRP3) inflammasome, leading to the maturation and release of Interleukin-1β and Interleukin-18, whereas ferroptosis is a lipid peroxidation-associated cell death. In this review, the major molecular pathways contributing to these multifaceted cell deaths have been discussed, and crosstalk among them regarding the pathogenesis of asthma and COPD has been highlighted. Further, the possible therapeutic approaches that can be utilized to mitigate both cell deaths at once have also been illustrated.

Emerging insights into the role of microRNAs regulation of ferroptosis in hepatocellular carcinoma

Hepatocellular carcinoma (HCC) is a major type of liver cancer and an important cause of cancer death. It has been reported that the hepatocyte death plays an important role in HCC. Ferroptosis is an iron-dependent programmed cell death characterized by the accumulation of free iron and lipid peroxidation. A series of studies have shown that ferroptosis contributes to the occurrence and development of HCC. MicroRNAs (miRNAs) are non-coding RNAs with a length of approximately 222 nt. In recent years, miRNAs have been shown to participate in regulating ferroptosis to play a vital role in HCC, but the related mechanisms are not fully understood. This review summarized the current understanding of ferroptosis, as well as the biogenesis and function of miRNAs, and focused on the role of miRNAs regulation of ferroptosis in HCC, with the hope of providing new targets and ideas for the treatment of HCC.

Exploring the potential active components and mechanisms of Tetrastigma hemsleyanum against ulcerative colitis based on network pharmacology in LPS-induced RAW264.7 cells

ETHNOPHARMACOLOGICAL RELEVANCE

Ulcerative colitis (UC) is a chronic form of inflammatory bowel disease, which current treatments often show limited effectiveness. Ferroptosis, a newly recognized form of programmed cell death has been implicated in UC pathogenesis, suggesting that it may be viable therapeutic target. Tetrastigma hemsleyanum (TH) has shown potential anti-UC effects, though it is unclear whether its therapeutic benefits are mediated by ferroptosis.

AIM OF THE STUDY

This study investigated the involvement of ferroptosis in the therapeutic effects of TH and identified key active components and pathways of TH against UC.

MATERIALS AND METHODS

The ethyl acetate extract of TH (TH_E) was found to be the most effective anti-inflammatory extract compared with the petroleum ether extract (TH_P), n-butanol extract (TH_N), and water-soluble extract (TH_W). TH_E's components were identified using UHPLC-MS/MS, ADME parameters, and network pharmacology. Additionally, TH_E's effects on ferroptosis were evaluated in an LPS-induced RAW264.7 cell model.

RESULTS

TH_E exhibited the strongest anti-inflammatory activity among four extracts. 10 compounds (Linolenic acid; Apigenin; Protocatechualdehyde; Asiatic acid; Quercetin; Isorhamnetin; Kaempferol; Azelaic acid; Oleic Acid; Palmitic acid) were selected from SwissADME database. Then a total of 281 targets for these 10 compounds and 1330 UC-related targets were identified from different database. Isorhamnetin was selected as the most promising anti-inflammatory component among 10 components. Furthermore, enrichment analysis revealed that ferroptosis was involved in UC development, with both TH_E and isorhamnetin exhibited inhibition of ferroptosis. Finally, isorhamnetin's anti-ferroptosis effects were linked to the Keap1/Nrf2/HO-1 pathway.

CONCLUSIONS

The results demonstrate that TH_E and isorhamnetin alleviate LPS-induced UC through restraining ferroptosis. Moreover, isorhamnetin's anti-UC properties are mediated by inhibiting ferroptosis via activation of the Keap1/Nrf2/HO-1 axis.

Targeting ferroptosis in the treatment of ulcerative colitis by traditional Chinese medicine: A novel therapeutic strategies

BACKGROUND

The incidence of ulcerative colitis (UC) has been rising rapidly in recent years, and there is currently no effective method to prevent its recurrence. Owing to its long treatment duration, difficulty in treatment, prolonged remission, and high costs, it has attracted global attention. Exploring safe, effective, and sustainable treatment regimens has become an urgent global issue. Traditional Chinese medicine (TCM) has unique advantages such as low cost, low drug resistance, and fewer side effects, and has accumulated rich experience in the treatment of UC.

PURPOSE

Ferroptosis, as a new form of non-apoptotic cell death, is characterized by iron homeostatic imbalance and lipid peroxidation in the redox system. Studies have shown that inhibited ferroptosis in intestinal epithelial cells can protect the intestinal mucosa. Targeted intervention in ferroptosis may be a new direction for the treatment of UC.

METHODS

We conducted a systematic literature search with Google Scholar, PubMed, Web of Science, ScienceDirect and X-mol databases have been utilized to retrieve relevant literature up to October 2024, using keywords included ferroptosis, Inflammatory bowel disease (IBD), UC, Crohn's disease and TCM, Chinese traditional prescription, Chinese medicine extract and active ingredients. The existing literature was comprehensively studied and sorted out.

RESULTS

Currently, UC is mainly treated with drugs, including corticosteroids, amino salicylates, biologics, and immunomodulators, but drug resistance and adverse reactions are common. Increasing evidence suggests that TCM may treat UC by interfering with ferroptosis. Scholars have confirmed that TCM can inhibit ferroptosis, and recent studies have shown that TCM can not only inhibit iron dependent lipid peroxidation in intestinal cells but also enhance the antioxidant and anti-inflammatory abilities of intestinal mucosa, thus playing a role in the treatment of UC. This review explores the relevance of TCM intervention in ferroptosis and the treatment of UC, discusses the possible mechanisms of ferroptosis in UC, and aims to provide a basis for the diagnosis and treatment of UC.

CONCLUSION

It is revealed that TCM targeted ferroptosis has a good application prospect in the treatment of UC, providing a theoretical basis for elucidating the pathogenesis of UC and the study of TCM targeting ferroptosis regulating lipid metabolism in the treatment of UC, and providing a new perspective for the treatment of IBD in the future.

Bovine milk-derived extracellular vesicles reduce oxidative stress and ferroptosis induced by Klebsiella pneumoniae in bovine mammary epithelial cells

BACKGROUND

Ferroptosis is characterized by increased production of reactive oxygen species (ROS) and membrane lipid peroxidation that can exacerbate inflammatory damage. Extracellular vesicles (EVs) isolated from bovine milk have many biological functions, including antioxidant properties. However, the role of EVs on Klebsiella pneumoniae-induced ferroptosis and oxidative stress in bovine mammary epithelial cells (bMECs) and murine mammary tissue is unclear. In this study, EVs were isolated from bovine colostrum, mature milk and clinical mastitis milk (defined as C-EVs, M-EVs and CM-EVs, respectively) and assessed by transmission electron microscopy, Western blot and transcriptome sequencing. Effects of EVs on K. pneumoniae-induced ferroptosis and oxidative stress in bMECs were evaluated with immunofluorescence and Western blot.

RESULTS

In bMECs, infection with K. pneumoniae induced oxidative stress, decreasing protein expression of Nrf2, Keap1 and HO-1 plus SOD activity, and increasing ROS concentrations. However, protein expression of GPX4, ACSL4 and S100A4 in bMECs, all factors that regulate ferroptosis, was downregulated by K. pneumoniae. Furthermore, this bacterium compromised tight junctions in murine mammary tissue, with low expression of ZO-1 and Occludin, whereas protein expression of Nrf2 and GPX4 was also decreased in mammary tissue. Adding C-EVs, M-EVs or CM-EVs reduced oxidative stress and ferroptosis in K. pneumoniae-infected bMECs in vitro and murine mammary tissues in vivo.

CONCLUSION

In conclusion, all 3 sources of milk-derived EVs alleviated oxidative stress and ferroptosis in K. pneumoniae-infected bMECs and mammary tissues.

Analysis of ferroptosis-related genes in cerebral ischemic stroke via immune infiltration and single-cell RNA-sequencing

Ischemic stroke (IS) represents a harmful neurological disorder with limited treatment options. Ferroptosis accounts for the iron-dependent, nonapoptotic cell death pattern, which shows the feature of fatal lipid ROS accumulation. Nonetheless, ferroptosis-related biomarkers for identifying IS early are currently lacking. The present study focused on investigating the possible ferroptosis-related biomarkers for IS and analyzing their effects on immune infiltration. Altogether five hub differentially expressed ferroptosis-related genes (DEFRGs) were identified from the relevant databases. Additionally, single-cell RNA-sequencing (seq) analysis was conducted for the comprehensive mapping of cell populations based on the IS database. These five hub DEFRGs were analyzed using gene set enrichment analysis, miRNA prediction, and single-cell RNA-seq analysis. A transient middle cerebral artery occlusion mouse model was constructed. We also adopted bioinformatics methods combined with western blot, changes to mitochondria, hematoxylin & eosin staining, Nissl staining, ROS fluorescence staining, immunohistochemistry, and quantitative real-time polymerase chain reaction (qRT-PCR) to show the involvement of ferroptosis in IS progression. The results revealed that nuclear factor erythroid-derived 2-like 2 (Nfe2l2) was the potential candidate biomarker for IS diagnosis, and ferroptosis may be suppressed via the Nfe2l2/HO-1 pathway. Thus, drug targeting Nfe2l2 can shed novel lights on IS treatment.

Adiponectin ameliorates traumatic brain injury-induced ferroptosis through AMPK- ACC1 signaling pathway

Various forms of neuronal death contribute to neurological injury after traumatic brain injury (TBI), leading to irreversible neurological deficits. Among these, ferroptosis is a form of regulated cell death characterized by the accumulation of iron-dependent lipid hydroperoxides and induced by the incorporation of polyunsaturated fatty acids (PUFAs) into cellular membranes. Adiponectin (APN), a cytokine secreted by adipocytes, have showed neuroprotective effects by binding to adiponectin receptors (AdipoRs), which are widely expressed in the central nervous system. However, the role of APN-AdipoRs signaling in ferroptosis after TBI remains unexplored. Our clinical analysis revealed a significant correlation between serum levels of APN and 6-month outcomes of TBI patients. Subsequent studies confirmed that TBI-induced ferroptosis was more pronounced in APN knockout mice compared to wild-type mice, while additional APN receptor agonist (AdipoRon) treatment significantly mitigated TBI induced ferroptosis. Furthermore, AdipoR1 knockdown significantly diminished the protective effects of AdipoRon against erastin-induced ferroptosis in primary neurons. Correspondingly, in the neuron-specific AdipoR1 conditional knockout (AdipoR1CKO) mice, neurons were more susceptible to ferroptosis after TBI, leading to increased brain edema and lesion volume, and exacerbated neurological deficits. Mechanically, activation of APN-AdipoR1 signaling promoted adenosine monophosphate activated protein kinase (AMPK) -mediated phosphorylation of acetyl-CoA carboxylase-1 (ACC1), thus suppressed the PUFAs biosynthesis, which determines theferroptosissensitivity of neurons. Taken together, these findings provided compelling evidence for the protective role of APN-AdipoR1 signaling against TBI-induced ferroptosis by inhibiting AMPK-ACC1.

Integrating Bulk and Single-Cell Transcriptomic Data to Identify Ferroptosis-Associated Inflammatory Gene in Alzheimer's Disease

Background

Ferroptosis is a form of programmed cell death triggered by iron-dependent lipid peroxidation, characterized by iron accumulation and elevated reactive oxygen species (ROS), leading to cell membrane damage. It is associated with a variety of diseases. However, the cellular and molecular links between ferroptosis, immune inflammation, and the brain-peripheral blood axis in Alzheimer's disease (AD) remain unclear.

Methods

We integrated bulk RNA-seq data from AD brain tissue and peripheral blood and refined the screening of AD candidate genes through differential gene expression analysis, weighted gene co-expression network analysis (WGCNA), and other approaches. Additionally, we analyzed single-cell RNA-seq (scRNA-seq) data from AD patients' brain tissue and peripheral blood, combined with scRNA-seq data from experimental autoimmune encephalomyelitis (EAE) mouse brain tissue. This enabled us to explore AD-related molecular mechanisms from a cell-type-specific perspective. Finally, candidate genes were validated in ferroptosis models using reverse transcription quantitative PCR (RT-qPCR) and immunofluorescence methods.

Results

Bulk RNA-seq analysis identified SLC11A1, an inflammatory gene associated with AD. Single-cell RNA-seq analysis further revealed that SLC11A1 expression was significantly elevated in the pro-inflammatory (M1-type) microglia and peripheral blood monocytes in AD. Moreover, we identified a microglial subpopulation in AD M1-type microglia that was highly associated with ferroptosis. This subpopulation simultaneously expressed characteristic markers of peripheral blood monocytes, suggesting that these cells may originate from peripheral blood monocytes, thereby triggering neuroinflammation through the ferroptosis pathway. Cell experiments confirmed that SLC11A1 was significantly upregulated in inflammatory microglia induced by ferroptosis.

Conclusion

This study reveals the key role of SLC11A1 in AD, particularly in the context of ferroptosis and immune inflammation. It provides a novel molecular mechanistic perspective and offers potential targets for future therapeutic strategies.

The Interplay Between Endoplasmic Reticulum Stress and Ferroptosis in Neurological Diseases

Many studies in the open literature have highlighted the critical roles of endoplasmic reticulum stress and ferroptosis in neurological diseases such as neurodegenerative diseases, brain injuries, and depression, indicating that they are involved in the onset and progression of these diseases. Therefore, it is essential to explore the regulatory mechanisms and potential interventions targeting endoplasmic reticulum stress and ferroptosis in neurological diseases. However, most existing research has primarily focused on the unidirectional mechanisms of endoplasmic reticulum stress and ferroptosis within the nervous system, with a lack of in-depth investigations into their interactions. In this paper, we first present an overview of the pathogenesis of endoplasmic reticulum stress and ferroptosis, along with their roles in neurological diseases. We then summarize the latest findings on the interaction mechanism between endoplasmic reticulum stress and ferroptosis from the perspectives of calcium iron homeostasis, reactive oxygen species, microenvironment, and related factors. Finally, we explore the potential molecular mechanisms and targeted interventions associated with endoplasmic reticulum stress and ferroptosis in neurological diseases.

Transcriptome and chromatin accessibility landscape of ovarian development at different egg-laying stages in taihe black-bone silky fowls

Taihe Black-Bone Silky Fowl (SF) is a famous local breed in China, known for its high nutritional and medicinal value. However, its low egg-laying rate significantly limits its economic benefits. This study aims to explore the ovarian development status, as well as the changes in the transcriptome and chromatin accessibility landscape at different egg-laying stages of SF, in order to reveal the epigenetic regulatory mechanisms underlying ovarian development in laying hens. The results showed that during peak egg-laying, serum levels of follicle stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2), and progesterone (P4) in the SF were higher than in the other laying periods. Meanwhile, the serum and ovarian matrix total antioxidant capacity (T-AOC) level decreased with increasing age, whereas the ovarian matrix malondialdehyde (MDA) level showed the opposite trend. Compared to the late laying period, several genes related to ovarian development and reproductive hormone secretion, including TDRD5, CCNO, CYP17A1, BMP15, and STAR, were upregulated during the peak egg-laying period. Additionally, we identified key transcription factors (TF) associated with different egg-laying periods. Specific TF, such as Fli1, Etv2, and AT2G15740, linked to the peak egg-laying period, play significant roles in cell and tissue development. The specific transcription factor Nr5a2, associated with the late laying period, has been shown to inhibit E2 production. Furthermore, genes related to poultry reproductive performance, such as STAR and WNT4, were found to be regulated by specific distal enhancers in open chromatin regions (OCR). In conclusion, this study elucidated the dynamic changes in the transcriptome and chromatin accessibility landscape during ovarian development in SF at different egg-laying stages and highlighted key TF, including Fli1, Etv2, and Nr5a2, as well as essential genes like STAR and WNT4 that regulate ovarian development. These findings provide valuable insights into the regulatory mechanisms influencing egg-laying performance in SF and offer new strategies for improving ovarian follicle development and egg production performance in poultry.

High Concentration of Iron Ions Contributes to Ferroptosis-Mediated Testis Injury

In order to explore the effect of excessive iron supplementation on ferroptosis in mouse testes, Kunming mice received injections of varying concentrations of iron. The organ weight, sperm density, and malformation rate were measured. Observations of pathological and ultrastructural alterations in spermatogenic tubules were conducted using haematoxylin eosin (HE) staining and transmission electron microscopy(TEM). Transcript levels of related genes and serum biochemical indicators were measured in mouse testicular tissue. The results showed that higher iron concentration inhibited the growth of mice; reduced the organ coefficients of the testis, heart, and liver; and increased the rate of sperm malformation and mortality. Supplementation with high levels of iron ions can adversely affect the male reproductive system by reducing sperm count, damaging the structure of the seminiferous tubules and causing sperm cell abnormalities. In addition, the iron levels also affected the immune response and blood coagulation ability by affecting the red blood cells, white blood cells and platelets. The results showed that iron ions can affect mouse testicular tissue and induce ferroptosis by altering the expression of ferroptosis-related genes. However, the degree of effect was different for the different concentrations of iron ions. The study also revealed the potential role of deferoxamine in inhibiting the occurrence of ferroptosis. Nevertheless, the damage caused to the testis by deferoxamine supplementation suggests the need for further research in this direction. This study provides reference for reproductive toxicity induced by environmental iron exposure and clarifies the mechanism of reproductive toxicity caused by iron overload and the important role of iron in the male reproductive system.

Advancements in programmed cell death research in antitumor therapy: a comprehensive overview

Cell death is a normal physiological process within cells that involves multiple pathways, such as normal DNA damage, cell cycle arrest, and programmed cell death (PCD). Cell death has been a hot spot of research in tumor-related fields, especially programmed cell death, which is a key form of cell death and is classified into different types according to the mechanism of occurrence, such as apoptosis, autophagy, necroptosis, pyroptosis, ferroptosis, and disulfidptosis. Given the important role of PCD in maintaining tissue homeostasis and inhibiting tumorigenesis and development, more and more basic and clinical studies are devoted to revealing its potential application in anti-tumor strategies. The purpose of this review is to systematically review the regulatory mechanisms of PCD and to summarize the latest research progress of anti-tumor treatment strategies based on PCD.

EGCG Alleviates DSS-Induced Colitis by Inhibiting Ferroptosis Through the Activation of the Nrf2-GPX4 Pathway and Enhancing Iron Metabolism

BACKGROUND

Ferroptosis is a regulated cell death process linked to various diseases. This study explored whether Epigallocatechin-3-gallate (EGCG), a tea-derived antioxidant, could regulate ferroptosis to alleviate dextran sulfate sodium (DSS)-induced colitis.

METHODS

A DSS-induced colitis model was used to assess EGCG's effects. Ferroptosis markers, oxidative stress, and iron metabolism were evaluated, alongside Nrf2-GPX4 pathway activation and ferritin (FTH/L) expression.

RESULTS

Iron dysregulation and oxidative stress contributed to DSS-induced colitis by activating ferroptosis in colonic epithelial cells. EGCG supplementation inhibited ferroptosis, reducing oxidative damage. Mechanistically, EGCG activated the Nrf2-GPX4 pathway, enhancing antioxidant defense, and improved iron metabolism by upregulating ferritin expression.

CONCLUSIONS

EGCG effectively suppressed DSS-induced ferroptosis and colitis, highlighting its potential as a ferroptosis inhibitor and therapeutic agent.

GPX4 expression changes in proximal tubule cells highlight the role of ferroptosis in IgAN

As an important mechanism of renal injury, oxidative stress (OS) is inseparable from the occurrence of renal fibrosis and the rapid progression of renal failure. However, the contribution of OS to IgA nephropathy (IgAN), the primary driver of chronic kidney disease remains uncertain. To investigate the effects of OS in IgAN, and identify the mechanisms of cell and tissue injury and protection, single-cell RNA sequencing (scRNA-seq) data and microarray data of IgAN were collected and analyzed. Through gene set variation analysis (GSVA), we identified significant alterations in the activity of multiple OS pathways within the proximal tubule cells (PTCs) of IgAN patients. Subsequent enrichment analysis revealed that the differentially expressed genes associated with OS in PTCs were primarily linked to the process of ferroptosis. Therefore, regulators of ferroptosis were collected to define the ferroptosis activity of PTCs in IgAN, and we found that the activity of suppressing ferroptosis was significantly enhanced. Moreover, being the central controller of ferroptosis, the expression of GPX4 in the PTCs of IgAN is extremely significant, which has been further verified by immunohistochemistry in kidney tissues of IgAN patients. Additionally, the GSVA of microarray data of IgAN indicated that the activity of driving ferroptosis and suppressing ferroptosis in tubulointerstitium were markedly decreased, however, the inhibition of ferroptosis in the tubulointerstitium of IgAN is relatively stronger. These findings demonstrate that ferroptosis inhibition may be a potential mechanism to alleviate OS injury in IgAN, and GPX4 could not only function as a specific marker for PTCs in IgAN but also represent a potential therapeutic target to halt the progression of the disease.

Luciferase-Based Reporter System for Investigating GPx4-Mediated Ferroptosis and Its Therapeutic Implications in Diabetes

Ferroptosis, a distinct form of regulated cell death, is characterized by iron-dependent lipid peroxide accumulation in cell membranes from dysregulated cellular iron homeostasis and compromised antioxidant defense mechanisms. Glutathione peroxidase 4 (GPx4) is crucial in the regulation of ferroptosis by controlling lipid peroxide accumulation. Recent research established the association of ferroptosis with several diseases, prompting investigation toward ferroptosis-targeted therapeutic approaches. However, there is a lack of sensor systems designed to evaluate ferroptosis modulation in intact cells. In this study, we developed a highly sensitive luciferase-based reporter system to study GPx4-mediated ferroptosis in cells. We constructed a novel vector flanking the GPx4 promoter driving luciferase gene expression, demonstrating ferroptosis-specific luciferase activity in transfected HEK293T cells. We established stable cells expressing the construct and optimized its suitability for high-throughput screening using well-established ferroptosis modulators. We identified eugenol, a phenolic compound, as a potent ferroptosis inhibitor using the developed reporter system. Eugenol demonstrated dose-dependent protection against ferroptosis-induced damage in pancreatic beta cells, as assessed by the expression of the key markers such as GPx4, SLC7A11, NRF2, and HO1. Further, we showed the regulation of iron levels and total iron-binding capacity of beta cells by eugenol in streptozotocin (STZ) -induced diabetic mice. Additionally, the diabetes-induced downregulation of GPx4 and antioxidant Nrf2 in pancreatic tissue was significantly mitigated by eugenol, as evidenced by both immunohistochemistry and gene expression analysis. This research validates the functionality of the ferroptosis sensor and offers an approach to develop antidiabetic therapy by targeting ferroptosis to protect beta-cell viability and function.

Exploration of the Biological Function of Ferroptosis in Bone Nonunion: An Analysis of Bioinformatics Combined Mendelian Randomization

To deeply investigate the mechanism of ferroptosis-related genes in the process of bone nonunion based on the GEO database. And using Mendelian randomization to explore the causal association of 15 trace elements with the occurrence of bone nonunion. Bone nonunion RNA-seq data were retrieved and downloaded from the GEO database. The differentially expressed genes in bone nonunion were identified using two differential expression analysis methods, "limma" and "WGCNA". Random Forest Tree, Support Vector Machine, and Lasso-cox were used to analyze and screen the genes related to ferroptosis in bone nonunion; A risk model of bone nonunion was constructed based on the screened ferroptosis-related genes; based on this, the pathway mechanism of ferroptosis-related genes involved in the occurrence and development of bone nonunion was further investigated. Mendelian randomization analysis was performed using inverse variance weighting as the main analysis method, and weighted median, Weighted mode, Mr-Egger, and Simple mode were used as complementary methods. Heterogeneity was detected using Cochran's Q test and funnel plot analysis, horizontal pleiotropy was detected using Mr-Egger intercept, and sensitivity analyses were performed using the "leave-one-out" method. PTGS2/PRKCA/MAPK14 all showed excellent diagnostic efficacy for bone nonunion. The risk prediction model based on PTGS2, PRKCA, and MAPK14 showed good predictive efficacy and clinical benefit rate for bone nonunion. Ferroptosis core gene PRKCA may be involved in the VEGF signaling pathway to affect the cell cycle and inhibit fracture healing. MR analysis suggests that Potassium and Vitamin E are protective factors for the development of bone nonunion. Ferroptosis genes PTGS2/PRKCA/MAPK14 are potential diagnostic targets for bone nonunion. The down-regulation of PRKCA expression may inhibit fracture healing through the VEGF signaling pathway during the growth of blood vessels at fracture breaks. The results of MR suggested that Potassium and Vitamin E have a promoting effect on fracture healing.

New curcumin derivative induces ferroptosis in MCF-7 cells through activating SLC7A11/GPX4 axis

Previous experiments have revealed that curcumin exerts potential antitumor effect by inducing apoptosis and ferroptosis of tumor cells. However, its low solubility and bioavailability, as well as fast metabolism limit its clinical use. The structural modification of curcumin is beneficial for the discovery of potential candidate drugs for cancer treatment. Here, three new series of curcumin derivatives including 25 compounds were synthesized at active sites on benzene ring and β-diketone moiety. Further antiproliferative activities against five cancer cell lines (Hela, A549, HepG2, MCF-7 and HT-29) in vitro showed that compound 4a-4e displayed remarkable anti-tumor effect against A549, HepG2, MCF-7 and HT-29. Of them, compound 4d is particularly prominent against MCF-7, with IC50 of 1.39 μM. Preliminary mechanism found that compound 4d could trigger ferrous ions and ROS accumulation, increase MDA level in MCF-7 cells, while significantly down-regulate GPX4 level in dose-dependent manner. Western Blot results discovered that compound 4d decreased the ratio of SLC7A11 to GAPDH and GPX4 to β-actin. Docking results indicated that compound 4d had good binding affinity to the active site of GPX4 (PDB ID: 7u4n and 7u4k). In conclusion, compound 4d may be potential anti-tumor agent, which induces ferroptosis in MCF-7 cells through activating SLC7A11/GPX4 axis.

Influence of Mesalazine on Ferroptosis-Related Gene Expression in In Vitro Colorectal Cancer Culture

Background/Objectives: Colorectal cancer (CRC) is one of the most common oncological disorders. Its fundamental treatments include surgery and chemotherapy, predominantly utilizing 5-fluorouracil (5-FU). Despite medical advances, CRC continues to present a high risk of recurrence, metastasis and low survival rates. Consequently, significant emphasis has been directed towards exploring novel types of cell death, particularly ferroptosis. Ferroptosis is characterized by iron imbalance and the accumulation of lipid peroxides and reactive oxygen species (ROS), leading to cellular damage and death. Thus, the discovery of safe inducers of ferroptosis, offering new hope in the struggle against CRC, remains crucial. In this study, we applied the concept of drug repositioning, selecting mesalazine (MES), a non-steroidal anti-inflammatory drug (NSAID), for investigation. Methods: The study was conducted on the colon cancer cell line DLD-1 and normal intestinal epithelial cells from the CCD 841 CoN cell line. Both cell lines were treated with MES solutions at concentrations of 10, 20, 30, 40, and 50 mM. Cytotoxicity was assessed using the MTT assay, while ferroptosis-related gene expression analysis was performed using oligonucleotide microarrays, with RT-qPCR used for validation. Results: MES effectively reduces the viability of DLD-1 cells while minimally affecting normal intestinal cells. Subsequent oligonucleotide microarray analysis revealed that MES significantly alters the expression of 56 genes associated with ferroptosis. Conclusions: Our results suggest that MES may induce ferroptosis in CRC, providing a foundation for further research in this area.

Identification of biomarkers associated with ferroptosis in macrophages infected with Mycobacterium abscessus using bioinformatic tools

Mycobacterium abscessus is a rapidly growing nontuberculous mycobacterium that causes severe pulmonary infections. Recent studies indicate that ferroptosis may play a critical role in the pathogenesis of M. abscessus pulmonary disease. We obtained gene expression microarray data from the Gene Expression Omnibus database, focusing on THP-1-derived macrophages infected with M. abscessus and uninfected controls. Differentially expressed genes related to ferroptosis were identified through weighted gene co-expression network analysis and the "limma" package, followed by gene set variation analysis and gene set enrichment analysis for enrichment assessment. To explore regulatory network relationships among hub genes, we constructed RBP-mRNA, ceRNA, and TF-mRNA networks. Additionally, a protein-protein interaction network was built, and functional enrichment analyses were conducted for the hub genes. The diagnostic value of these genes was assessed using receiver operating characteristic curves. Six differentially expressed genes associated with ferroptosis were identified in M. abscessus infection. The receiver operating characteristic curves demonstrated that these genes had excellent predictive value for the infection. Functional enrichment analysis showed that these genes were involved in immune responses, inflammation, cellular metabolism, cell death, and apoptosis. Pathway enrichment analysis revealed significant enrichment in pathways related to apoptosis, inflammation, and hypoxia. The RBP-mRNA network highlighted significant interactions between hub genes and key RNA-binding proteins, while the ceRNA network predicted that miRNAs and lncRNAs regulate ferroptosis-related genes NACC2 and ITPKB. Furthermore, interactions between the hub gene HSD3B7 and transcription factors LMNB1 and ASCL1 may promote ferroptosis in macrophages by influencing iron metabolism and reactive oxygen species production, contributing to the M. abscessus infection process. Our findings identified biomarkers linked to ferroptosis in M. abscessus infection, providing new insights into its pathogenic mechanisms and potential therapeutic strategies.

Hyperoxia-activated Nrf2 regulates ferroptosis in intestinal epithelial cells and intervenes in inflammatory reaction through COX-2/PGE2/EP2 pathway

The lack of knowledge about the mechanism of hyperoxia-induced intestinal injury has attracted considerable attention, due to the potential for this condition to cause neonatal complications. This study aimed to explore the relationship between hyperoxia-induced oxidative damage and ferroptosis in intestinal tissue and investigate the mechanism by which hyperoxia regulates inflammation through ferroptosis. The study systematically evaluated the effects of hyperoxia on oxidative stress, mitochondrial damage, ferroptosis, and inflammation of intestinal epithelial cells both in vitro and in vivo. The results showed that ferroptosis was involved in intestinal oxidative damage caused by hyperoxia and was regulated by Nrf2. Moreover, hyperoxia-induced oxidative damage regulated inflammation through ferroptosis by upregulating the COX-2/PGE2/EP2 signaling pathway. These findings have important implications for future clinical prevention and therapeutic approaches to neonatal organ injury caused by hyperoxia treatment.

Ginkgo biloba extract alleviates ferroptosis in lung epithelial cells induced by cigarette smoke extract through miR-3,619-5p/GPX4 axis

Ginkgo biloba extract (GBE), a therapeutic drug, has anti-inflammatory and antioxidant effects that protect cells from harmful substances. Although GBE has been extensively studied in the prevention and treatment of lung diseases, its mechanism of action in chronic obstructive pulmonary disease (COPD) is unclear. In the present study, cigarette smoke extract (CSE) and cigarette smoke (CS) were used to induce COPD in cell and animal models. The expression of related genes and proteins was detected, and cell damage and lung tissue damage were evaluated via CCK-8 assays, flow cytometry analyses, ELISA, and HE staining. In HBE cells, the expression of miR-3,619-5p was upregulated after CSE induction. However, GBE treatment alleviated the impact of CSE on HBE cell damage and alleviated COPD in vivo. In addition, GBE treatment increased the expression of GPX4 by inhibiting the expression of miR-3,619-5p, and it reduced the release of the IL-6, IL-8, and TNF-α inflammatory factors. Moreover, GBE treatment decreased the production of ROS and MDA, as well as decreased the expression of the ferroptosis-related protein ACSL4, and it promoted the production of GSH and the expression of FTH1. Further, GBE treatment improved cell viability, inhibited ferroptosis, and ultimately alleviated COPD. The present findings suggest that GBE alleviates the progression of COPD through the inhibitory effect of the miR-3,619-5p/GPX4 axis on the ferroptosis process and that GBE may be an effective treatment option for COPD.

Ginsenoside Rb1 targets to HO-1 to improve sepsis by inhibiting ferroptosis

Sepsis remains the leading cause of mortality among Intensive Care Unit (ICU) patients, with its pathogenesis and treatment not yet fully elucidated. Ferroptosis plays a critical role in sepsis, suggesting that ferroptosis-related genes may serve as potential therapeutic targets. This study aims to identify key ferroptosis-related genes in sepsis and explore targeted therapeutics. Through differential expression analysis of the GSE13940 and GSE26440 datasets, heme oxygenase-1 (HO-1) was identified as a hub gene associated with ferroptosis. Additionally, single-cell analysis of the GSE175453 dataset revealed a significant upregulation of HO-1 expression in monocyte lineages during sepsis. The cecal ligation and puncture (CLP) method was employed to induce sepsis in a mouse model, lung and intestinal tissues exhibited typical ferroptosis characteristics, with a significant increase in HO-1 expression. However, treatment with the HO-1 inhibitor zinc protoporphyrin (ZNPP) significantly ameliorated ferroptosis in CLP-induced lung and intestinal tissues, as well as in lipopolysaccharide (LPS)-induced THP-1 cells. Subsequently, molecular docking, surface plasmon resonance (SPR), and microscale thermophoresis (MST) experiments demonstrated that ginsenoside Rb1 specifically targets HO-1, identifying K18A as the key binding residue. Finally, experiments conducted both in vitro and in vivo verified that ginsenoside Rb1 significantly reduces HO-1 expression, inhibits ferroptosis in sepsis-induced lung, and intestinal tissues and THP-1 cells, and improves sepsis-induced pulmonary and intestinal damage. In conclusion, this study identifies HO-1 as a key ferroptosis target in sepsis and suggests ginsenoside Rb1 as a potential novel HO-1 inhibitor for the therapeutic approach of sepsis-induced organ dysfunction.

Ferroptosis in organ ischemia-reperfusion injuries: recent advancements and strategies

Ferroptosis is a newly discovered type of regulated cell death participated in multiple diseases. Different from other classical cell death programs such as necrosis and apoptosis, ferroptosis involving iron-catalyzed lipid peroxidation is characterized by Fe2+ accumulation and mitochondria alterations. The phenomenon of oxidative stress following organ ischemia-reperfusion (I/R) has recently garnered attention for its connection to the onset of ferroptosis and subsequent reperfusion injuries. This article provides a comprehensive overview underlying the mechanisms of ferroptosis, with a further focus on the latest research progress regarding interference with ferroptotic pathways in organ I/R injuries, such as intestine, lung, heart, kidney, liver, and brain. Understanding the links between ferroptosis and I/R injury may inform potential therapeutic strategies and targeted agents.

Dihydroquercetin Ameliorates Neuronal Ferroptosis in Rats After Subarachnoid Hemorrhage via the PI3K/AKT/Nrf2/HO-1 Pathway

Subarachnoid hemorrhage (SAH) is a specific type of stroke. Dihydroquercetin (DHQ), a flavonoid, is known for its various pharmacological properties. This study aimed to explore the roles and mechanisms of DHQ in influencing the progression of SAH. A rat SAH model was established using the endovascular perforation technique. Following SAH induction, DHQ was administered orally 1 h later. Assessments included SAH scores, neurological function, brain swelling, blood-brain barrier (BBB) integrity, neuronal damage, apoptosis levels, inflammation, and indicators of ferroptosis using various treatments. The HT22 cells were exposed to hemin to simulate SAH-like conditions under in vitro settings. Cell counting kit-8 assays, flow cytometry, enzyme?linked immunosorbent assay, BODIPY 581/591 C11 staining, western blot analysis, and biochemical kits were employed to evaluate the potential effects of DHQ. Moreover, the mechanisms responsible for the protective effect of DHQ were examined by western blot analysis. The in vivo findings revealed that DHQ mitigated neurological impairments, brain swelling, BBB disruption, and neuronal injury at 24 h post-SAH. DHQ also reduced neuronal degeneration, inflammation, and ferroptosis following SAH. The in vitro findings revealed that DHQ enhanced cell survival and reduced ferroptosis at 24 h following hemin exposure. Mechanistically, DHQ activated phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/protein kinase B (AKT)/nuclear factor erythroid 2-related factor 2 (Nrf2) signaling in SAH rats and hemin-treated HT22 cells to exert neuroprotective effects. In conclusion, this study reveals that DHQ can effectively decrease BBB permeability, brain edema, neurological dysfunctions, and ferroptosis post-SAH by activating the PI3K/AKT/Nrf2/HO-1 pathway.

Acupuncture ameliorates synovitis in mice with collagen-induced arthritis by repressing ferroptosis via butyric acid

It has been reported that the symptoms of rheumatoid arthritis (RA) can be ameliorated by acupuncture, an external treatment of traditional Chinese medicine. However, the immune mechanism underlying its action is elusive. Accordingly, this study investigated the role and mechanism of manual acupuncture (MA) in collagen-induced arthritis (CIA) in mice. The results demonstrated that MA or NaB treatment reduced Articular Index scores and right paw thickness and alleviated synovial inflammation and cartilage damage. MA or NaB treatment altered the content and relative abundance of short-chain fatty acids, particularly butyric and propionic acids, in feces. Additionally, MA or NaB treatment elevated SCD1, SREBP1, and GPX4 protein expression in synovial tissues and GSH-px contents in serum while decreasing ROS fluorescence intensity and MDA contents in peripheral blood. A linear correlation was found between the relative expression of SCD1 and SREBP1 in synovial tissues and the contents of propionic acids and butyric acids in feces, as well as between the contents of propionic acids and butyric acids. In summary, MA regulates butyric acids to inhibit ferroptosis, therefore suppressing inflammation in RA.

Interleukin-17D accelerates atherosclerosis through promoting endothelial cells ferroptosis via CD93/miR-181a-5p/SLC7A11 signaling

IL-17D has been found to induce inflammatory cytokines in endothelial cells, but its exact role in atherosclerosis (AS) is unclear. This study aims to explore IL-17D' function in AS development. The expression of IL-17D was examined in AS patients and mice, and its clinical significance was evaluated in patients with acute coronary syndrome (ACS). Apolipoprotein E and IL-17D deficient mice (ApoE-/-IL-17D-/-) were generated for this study. The inflammation response and ferroptosis status in vascular endothelial cells were assessed following IL-17D treatment. Flow cytometry was used to identify the functional receptor of IL-17D. Additionally, RNA-seq was utilized to analyze the miRNA expression profiles induced by IL-17D. Plasma levels of IL-17D were elevated in both AS patients and mice, and were correlated with an increased incidence of major adverse cardiovascular events (MACEs). ApoE-/-IL-17D-/- mice displayed reduced inflammation and fewer atherosclerotic lesions. Treatment with IL-17D resulted in elevated levels of IL-6, IL-8, and ROS, as well as impaired cell viability and GSH production in endothelial cells. Ferroptosis inhibitor (Fer-1) suppressed the proinflammatory effects by IL-17D. Furthermore, CD93 was identified as the functional receptor for IL-17D in endothelial cells. The inhibition of miR-181a-5p led to a significant increase in cell viability and GSH levels, alongside a reduction in ROS and IL-6/IL-8 levels, while the suppression of SLC7A11 abolished these effects. Our findings suggest that IL-17D promotes endothelial inflammation by causing ferroptosis via CD93/miR-181a-5p/SLC7A11 signaling pathway. These insights advance our understanding of the pathophysiology of AS and identify a potential target for therapeutic intervention.

Types of cell death in diabetic cardiomyopathy: insights from animal models

Approximately one-tenth of the global population is affected by diabetes mellitus, and its incidence continues to rise each year. In China, 1.4 million patients die from diabetes-related complications every year. Additionally, approximately 26% of patients with diabetes develop diabetic cardiomyopathy, with heart failure being one of the main causes of death in these patients. However, early detection of diabetic cardiomyopathy has proven to be difficult in a clinical setting; furthermore, there are limited guidelines and targeted means of prevention and treatment for this disease. In recent years, several studies have provided evidence for the occurrence of various forms of regulated cell death in diabetic myocardial cells, including apoptosis, necroptosis, ferroptosis, and cuproptosis, which are closely linked to the pathological progression of diabetic cardiomyopathy. Although most research on diabetic cardiomyopathy is currently in the animal trial phase, the inhibition of these regulatory cell death processes can limit or slow down the progression of diabetic cardiomyopathy. Therefore, this review discusses the appropriate animal experimental models currently available for diabetic cardiomyopathy and evaluates the roles of apoptosis, necroptosis, ferroptosis, and cuproptosis in diabetic cardiomyopathy. We hope to provide new methods and ideas for future research in diabetic cardiomyopathy.

Maresin1 Inhibits Ferroptosis via the Nrf2/SLC7A11/GPX4 Pathway to Protect Against Sepsis-Induced Acute Liver Injury

Purpose

Maresin 1 (MaR1) is a specialized pro-resolving mediator with anti-inflammatory properties that promotes tissue repair. This study aims to investigate the molecular involvement of MaR1 in protecting against sepsis-induced acute liver injury (SI-ALI).

Methods

In vivo, a murine SI-ALI model was established using the cecal ligation and puncture (CLP) paradigm, providing a system in which the mechanistic functions of MaR1 could be tested. These analyses were supplemented through in vitro assays in which Alpha mouse liver 12 (AML12) hepatocytes and RAW264.7 macrophages were co-cultured in a Transwell system, with lipopolysaccharide (LPS) stimulation being used to establish a sepsis model. These cells were treated with MaR1 and/or nuclear factor erythroid 2-related factor 2 (Nrf2)inhibitor, while lentiviral transduction was used to knock down Nrf2 within AML12 cells. Hepatic pathological damage was assessed through hematoxylin and eosin staining. Lipid peroxidation-related analyses were conducted through the use of thiobarbituric acid, ferrous ions, glutathione, and appropriate fluorescent probes for reactive oxygen species detection. Liver enzymes and inflammatory mediators were quantified using appropriate Enzyme-Linked Immunosorbent Assays (ELISAs). Protein concentrations were evaluated via Western blot analysis.

Results

The presence of ferroptosis in SI-ALI. MaR1 was found to proficiently suppress ferroptosis in SI-ALI. Mechanistically, MaR1 enhanced Nrf2 expression in AML12 hepatocytes, while the Nrf2 inhibitor ML-385 or Nrf2 siRNA mitigated MaR1's regulatory influence on ferroptosis. Meanwhile, the expressions of the downstream genes solute carrier family 7 member 11 (SLC7A11) and glutathione peroxidase 4 (GPX4) diminished, suggesting that MaR1 has a protective function via activating the Nrf2/SLC7A11/GPX4 pathway to mitigate ferroptosis in septic liver injury.

Conclusion

The results indicate that MaR1 mitigates SI-ALI via stimulating the Nrf2/SLC7A11/GPX4 pathway to suppress ferroptosis. Moreover, it offers significant potential as a new agent for the prevention of SI-ALI.

Ferroptosis in Cardiovascular Diseases and Ferroptosis-Related Intervention Approaches

OBJECTIVE

Cardiovascular diseases (CVDs) are major public health problems that threaten the lives and health of individuals. The article has reviewed recent progresses about ferroptosis and ferroptosis-related intervention approaches for the treatment of CVDs and provided more references and strategies for targeting ferroptosis to prevent and treat CVDs.

METHODS

A comprehensive review was conducted using the literature researches.

RESULTS AND DISCUSSION

Many ferroptosis-targeted compounds and ferroptosis-related genes may be prospective targets for treating CVDs and our review provides a solid foundation for further studies about the detailed pathological mechanisms of CVDs.

CONCLUSION

There are challenges and limitations about the translation of ferroptosis-targeted potential therapies from experimental research to clinical practice. It warrants further exploration to pursure safer and more effective ferroptosis-targeted thereapeutic approaches for CVDs.

Decoding ferroptosis: transforming orthopedic disease management

As a mechanism of cell death, ferroptosis has gained popularity since 2012. The process is distinguished by iron toxicity and phospholipid accumulation, in contrast to autophagy, apoptosis, and other cell death mechanisms. It is implicated in the advancement of multiple diseases across the body. Researchers currently know that osteosarcoma, osteoporosis, and other orthopedic disorders are caused by NRF2, GPX4, and other ferroptosis star proteins. The effective relief of osteoarthritis symptoms from deterioration has been confirmed by clinical treatment with multiple ferroptosis inhibitors. At the same time, it should be reminded that the mechanisms involved in ferroptosis that regulate orthopedic diseases are not currently understood. In this manuscript, we present the discovery process of ferroptosis, the mechanisms involved in ferroptosis, and the role of ferroptosis in a variety of orthopedic diseases. We expect that this manuscript can provide a new perspective on clinical diagnosis and treatment of related diseases.

Potential mechanisms of rheumatoid arthritis therapy: Focus on macrophage polarization

Rheumatoid arthritis (RA) is an autoimmune inflammatory disease that affects multiple organs and systems in the human body, often leading to disability. Its pathogenesis is complex, and the long-term use of traditional anti-rheumatic drugs frequently results in severe toxic side effects. Therefore, the search for a safer and more effective antirheumatic drug is extremely important for the treatment of RA. As important immune cells in the body, macrophages are polarized. Under pathological conditions, macrophages undergo proliferation and are recruited to diseased tissues upon stimulation. In the local microenvironment, they polarize into different types of macrophages in response to specific factors and perform unique functions and roles. Previous studies have shown that there is a link between macrophage polarization and RA, indicating that certain active ingredients can ameliorate RA symptoms through macrophage polarization. Notably, Traditional Chinese medicine (TCM) monomer component and compounds demonstrate a particular advantage in this process. Building upon this insight, we reviewed and analyzed recent studies to offer valuable and meaningful insights and directions for the development and application of anti-rheumatic drugs.

The role and mechanism of various trace elements in atherosclerosis

Atherosclerosis is a slow and complex disease that involves various factors, including lipid metabolism disorders, oxygen-free radical production, inflammatory cell infiltration, platelet adhesion and aggregation, and local thrombosis. Trace elements play a crucial role in human health. Many trace elements, especially metallic ones, not only maintain the normal functions of organs but also participate in basic metabolic processes. The latest studies have revealed a close correlation between trace elements and the occurrence and progression of atherosclerosis. The imbalance of these trace elements can induce atherosclerosis or accelerate its progression through various mechanisms, which poses a significant threat to human health. Therefore, exploring the specific mechanism of trace elements on atherosclerosis is highly significant. In this review, we summarized the roles and mechanisms of iron, copper, zinc, magnesium, and selenium homeostasis and imbalance in atherosclerosis development, in order to identify novel targets and therapeutic strategies for treating atherosclerosis.

Neural Precursor Cell-Expressed Developmentally Downregulated Protein 4 (NEDD4)-Mediated Ubiquitination of Glutathione Peroxidase 4 (GPX4): A Key Pathway in High-Glucose-Induced Ferroptosis in Corpus Cavernosum Smooth Muscle Cells

Pharmacological treatment of diabetes mellitus-induced erectile dysfunction (DMED) has become increasingly challenging due to the limited efficacy of phosphodiesterase type 5 inhibitors (PDE5i). As the global prevalence of DM continues, there is a critical need for novel therapeutic strategies to address DMED. In our previous studies, we found that Glutathione peroxidase 4 (GPX4), a ferroptosis inhibitor, can ameliorate DMED in diabetic rats. However, the specific role of GPX4 in corpus cavernosum smooth muscle cells (CCSMCs) and its regulatory mechanisms remain unclear. In this study, we established primary cultures of CCSMCs and systematically analyzed the role of GPX4 under high-glucose conditions. To further elucidate the upstream regulatory pathways of GPX4, we employed immunoprecipitation coupled with mass spectrometry (IP-MS) to identify potential interacting proteins. Additionally, co-immunoprecipitation (Co-IP) and cycloheximide (CHX) chase assays were conducted to explore the regulatory dynamics and post-translational stability of GPX4. Under high-glucose conditions, the expression of GPX4 in CCSMCs is significantly downregulated, leading to an increase in intracellular oxidative stress and heightened levels of ferroptosis, accompanied by dysfunction in smooth muscle cell relaxation. Furthermore, the CHX chase assay revealed that high glucose accelerates GPX4 protein degradation via the ubiquitin-proteasome pathway. Subsequent IP-MS identified NEDD4, an E3 ubiquitin ligase, as a potential interacting partner of GPX4. Further validation demonstrated that NEDD4 modulates the ubiquitination process of GPX4, thereby influencing its stability and expression. In conclusion, we identified NEDD4 as a key regulator of GPX4 stability through ubiquitin-mediated proteasomal degradation. These findings suggest potential therapeutic strategies targeting the NEDD4-GPX4 axis to alleviate DMED pathology.

Infection of Helicobacter pylori contributes to the progression of gastric cancer through ferroptosis

Helicobacter pylori (H. pylori) is a gram-negative pathogen that colonizes gastric epithelial cells, and its chronic infection is the primary risk factor for the development of gastric cancer (GC). Ferroptosis is an iron-dependent form of cell death characterized by intracellular lipid peroxide accumulation and reactive oxygen species (ROS) imbalance. There is evidence suggesting that pathogens can manipulate ferroptosis to facilitate their replication, transmission, and pathogenesis. However, the interaction between ferroptosis and H. pylori infection requires further elucidation. We reviewed the mechanism of ferroptosis and found that H. pylori virulence factors such as cytotoxin-associated gene A (CagA), vacuolating cytotoxin A (VacA), neutrophil-activating protein A (NapA), superoxide dismutase B (SodB), γ-glutamyl transpeptidase (gGT), lipopolysaccharide (LPS), and outer inflammatory protein A (OipA) affected glutathione (GSH), ROS, and lipid oxidation to regulate ferroptosis. It also affected the progression of GC by regulating ferroptosis-related indicators through abnormal gene expression after H. pylori infected gastric mucosa cells. Finally, we discuss the potential application value of ferroptosis inducers, inhibitors and other drugs in treating H. pylori-infected GC patients while acknowledging that their interactions are still not fully understood.

The connection between autophagy and ferroptosis in AKI: recent advances regarding selective autophagy

Acute kidney injury (AKI) is a significant issue in public health, displaying a high occurrence rate and mortality rate. Ferroptosis, a form of programmed cell death (PCD), is characterized by iron accumulation and intensified lipid peroxidation. Recent studies have demonstrated the pivotal significance of ferroptosis in AKI caused by diverse stimuli, including ischemia-reperfusion injury (IRI), sepsis and toxins. Autophagy, a multistep process that targets damaged organelles and macromolecules for degradation and recycling, also plays an essential role in AKI. Previous research has demonstrated that autophagy deletion in proximal tubules could aggravate tubular injury and renal function loss, indicating the protective function of autophagy in AKI. Consequently, finding ways to stimulate autophagy has become a crucial therapeutic strategy. The recent discovery of the role of selective autophagy in influencing ferroptosis has identified new therapeutic targets for AKI and has highlighted the importance of understanding the cross-talk between autophagy and ferroptosis. This study aims to provide an overview of the signaling pathways involved in ferroptosis and autophagy, focusing on the mechanisms and functions of selective autophagy and autophagy-dependent ferroptosis. We hope to establish a foundation for future investigations into the interaction between autophagy and ferroptosis in AKI as well as other diseases.

Efficacy of Bacillus clausii UBBC-07 and Bacillus coagulans Unique IS-2 in Mitigating Pulmonary Parameters in Patients With Moderate COVID-19 Symptoms

Probiotics have shown efficacy in preventing and reducing infections caused by common viruses, including rotavirus, norovirus, hepatitis, human papillomavirus (HPV), human immunodeficiency virus (HIV), and herpes simplex virus (HSV). A randomized, double-blind, placebo-controlled, three-arm parallel-group study was conducted on 56 patients with moderate COVID-19 symptoms. Patients were randomly assigned to one of the three groups: standard treatment combined with Bacillus clausii UBBC-07, standard treatment combined with Bacillus coagulans Unique IS-2, or standard treatment with a placebo. The probiotics were administered as an oral suspension containing 2 billion spores, taken twice daily for 14 days. The placebo group received distilled water administered twice daily for 14 days. Clinical recovery and respiratory parameters were assessed, with C-reactive protein (CRP), serum ferritin, and lactate dehydrogenase (LDH) levels measured on days one, seven, and 14, while D-dimer and interleukin-6 levels were evaluated on days one and 14. There was a significant reduction (p < 0.01) in serum ferritin levels for both Bacillus clausii UBBC-07 and Bacillus coagulans Unique IS-2 compared to the placebo group. The median reduction in serum ferritin levels on day seven was 345 μg/L (39.2%) in the Bacillus clausii UBBC-07 group, 350 μg/L (40.7%) in the Bacillus coagulans Unique IS-2 group, and 270 μg/L (30.9%) in the placebo group. By day 14, the reductions were 665 μg/L (75.6%) for the Bacillus clausii UBBC-07 group, 630 μg/L (73.3%) for the Bacillus coagulans Unique IS-2 group, and 595 μg/L (69.1%) for the placebo group. D-dimer levels were significantly reduced by the end of treatment (day 14) in the Bacillus coagulans Unique IS-2 group compared to the placebo group, with median decreases of 0.36 μg/ml (60.0%) for Bacillus coagulans Unique IS-2, 0.21 μg/ml (36.8%) for Bacillus clausii UBBC-07, and 0.22 μg/ml (34.4%) for the placebo group. No significant differences were observed in other biomarkers, including CRP, LDH, and interleukin-6. No adverse effects related to probiotic administration were observed, and the intervention was well tolerated by all patients. In conclusion, Bacillus coagulans Unique IS-2 and Bacillus clausii UBBC-07 may be considered adjunct therapies for mitigating COVID-19 infections.

Construction of a ferroptosis and hypoxia-related gene signature in cervical cancer to assess tumour immune microenvironment and predict prognosis

BACKGROUND

This study aimed to investigate the potential role of ferroptosis/hypoxia-related genes in cervical cancer to improve early management and treatment of cervical cancer.

METHODS

All data were downloaded from public databases. Ferroptosis/hypoxia-related genes associated with cervical cancer prognosis were selected to construct a risk score model. The relationship between risk score and clinical features, immune microenvironment and prognosis were analysed.

RESULTS

Risk score model was constructed based on eight signature genes. Drug prediction analysis showed that bevacizumab and cisplatin were related to vascular endothelial growth factor A. Risk score, as an independent prognostic factor of cervical cancer, had a good survival prediction effect. The two groups differed significantly in degree of immune cell infiltration, gene expression, tumour mutation burden and somatic variation.

CONCLUSIONS

We developed a novel prognostic gene signature combining ferroptosis/hypoxia-related genes, which provides new ideas for individual treatment of cervical cancer.

Yi-Qi-Jian-Pi-Xiao-Yu formula inhibits cisplatin-induced acute kidney injury through suppressing ferroptosis via STING-NCOA4-mediated ferritinophagy

BACKGROUND

The kidneys are the primary excretory organs for platinum drugs, making them susceptible to damage from these drugs. Cisplatin-induced acute kidney injury (CIAKI) is the most common side effect observed in patients undergoing clinical cisplatin treatment. A traditional Chinese medicinal preparation, the Yi-Qi-Jian-Pi-Xiao-Yu formula (YQJPXY), which is a modified formulation of the classical Chinese medicine formula Buyang Huanwu Decoction, has long been used in the treatment of clinical kidney diseases. It is expected to be used to ameliorate cisplatin-induced acute kidney injury. However, the mechanism of this YQJPXY for the treatment of cisplatin-induced acute kidney injury remains unclear.

PURPOSE

The objective of this study is to examine the impact of the YQJPXY on the inhibition of ferroptosis in cisplatin-induced acute kidney injury and to elucidate the underlying mechanisms.

METHODS

The active components of YQJPXY were analysed using UPLC-MS/MS. A comprehensive investigation was conducted to elucidate the effects and regulatory mechanisms of YQJPXY on CIAKI and ferroptosis in mice subjected to acute cisplatin treatment and in mice receiving cisplatin treatment after STING expression was inhibited using the STING inhibitor C176. The renoprotective effect of YQJPXY on cisplatin-treated mice was evaluated by measuring tissue damage, inflammation and pro-fibrosis. In addition, we employed network pharmacology and molecular docking methodologies to analyse the principal regulatory targets of YQJPXY. Furthermore, the expression of key proteins and markers of ferroptosis and iron metabolism, as well as the levels of key indicators related to STING-associated ferritinophagy, were examined by immunoblotting, immunohistochemistry, immunoprecipitation, quantitative real-time PCR (qPCR) and specific probes.

RESULTS

The results demonstrated that YQJPXY reduced the levels of indicators of injury, inflammation and pro-fibrosis in CIAKI mice, with renoprotective effects. Network pharmacological analyses revealed that ferroptosis might be the main biological process regulated by YQJPXY. Furthermore, molecular docking results indicated that STING might be a potential regulatory target of YQJPXY. Furthermore, YQJPXY treatment resulted in a significant reduction in MDA and 4-HNE levels, as well as the inhibition of ferroptosis and improvement in iron metabolic processes. Concomitantly, YQJPXY exhibited a robust protective effect on ferroptosis and iron metabolism homeostasis, as evidenced by its inhibitory action on ferritinophagy. Validation experiments utilising the cisplatin inhibitor C176 demonstrated that YQJPXY inhibits cisplatin-induced ferroptosis in kidney via STING-mediated ferritinophagy.

CONCLUSION

These suggest that YQJPXY alleviates cisplatin-induced acute kidney injury through suppressing ferroptosis via STING-NCOA4-mediated Ferritinophagy.

Sirtuins as Potential Targets for Neuroprotection: Mechanisms of Early Brain Injury Induced by Subarachnoid Hemorrhage

Subarachnoid hemorrhage (SAH) is a prevalent cerebrovascular disease with significant global mortality and morbidity rates. Despite advancements in pharmacological and surgical approaches, the quality of life for SAH survivors has not shown substantial improvement. Traditionally, vasospasm has been considered a primary contributor to death and disability following SAH, but anti-vasospastic therapies have not demonstrated significant benefits for SAH patients' prognosis. Emerging studies suggest that early brain injury (EBI) may play a crucial role in influencing SAH prognosis. Sirtuins (SIRTs), a group of NAD + -dependent deacylases comprising seven mammalian family members (SIRT1 to SIRT7), have been found to be involved in neural tissue development, plasticity, and aging. They also exhibit vital functions in various central nervous system (CNS) processes, including cognition, pain perception, mood, behavior, sleep, and circadian rhythms. Extensive research has uncovered the multifaceted roles of SIRTs in CNS disorders, offering insights into potential markers for pathological processes and promising therapeutic targets (such as SIRT1 activators and SIRT2 inhibitors). In this article, we provide an overview of recent research progress on the application of SIRTs in subarachnoid hemorrhage and explore their underlying mechanisms of action.

Iron homeostasis and neurodegeneration in the ageing brain: Insight into ferroptosis pathways

Ageing is a major risk factor for various chronic diseases and offers a potential target for developing novel and broadly effective preventatives or therapeutics for age-related conditions, including those affecting the brain. Mechanisms contributing to ageing have been summarized as the hallmarks of ageing, with iron imbalance being one of the major factors. Ferroptosis, an iron-mediated lipid peroxidation-induced programmed cell death, has recently been implicated in neurodegenerative diseases such as Alzheimer's disease (AD), Parkinson's disease (PD) and Huntington's disease (HD). Addressing ferroptosis offers both opportunities and challenges for treating neurodegenerative diseases, though the specific mechanisms remain unclear. This research explores the key processes behind how ferroptosis contributes to brain ageing, with a focus on the complex signaling networks that are involved. The current article aims to uncover that how ferroptosis, a specific type of cell death, may drive age-related changes in the brain. Additionally, the article also unveils its role in neurodegenerative diseases, discussing how understanding these mechanisms could open up new therapeutic avenues.

Vascular endothelial growth factor A inhibition remodels the transcriptional signature of lipid metabolism in psoriasis non-lesional skin in 12 h ex vivo culture

BACKGROUND

Vascular endothelial growth factor A (VEGF-A)-mediated angiogenesis is involved in the pathogenesis of psoriasis. VEGF-A inhibitors are widely used to treat oncological and ophthalmological diseases but have not been used in psoriasis management. The molecular mechanisms underlying the effects of VEGF-A inhibition in psoriatic skin remain unknown.

OBJECTIVES

To identify the genes and canonical pathways affected by VEGF-A inhibition in non-lesional and plaque skin ex vivo.

METHODS

Total RNA sequencing was performed on skin biopsies from patients with psoriasis (n = 6; plaque and non-lesional skin) and healthy controls (n = 6) incubated with anti-VEGF-A monoclonal antibody (bevacizumab, Avastin®) or human IgG1 isotype control for 12 h in serum-free organ culture. Differentially expressed genes between paired control and treated samples with adjusted p-values <0.1 were considered significant. Gene ontology and ingenuity pathway analysis was used to identify enriched biological processes, canonical pathways and upstream regulators.

RESULTS

VEGF-A inhibition upregulated the expression of genes involved in lipid metabolism. Pathway enrichment analysis identified the activation of pathways involved in fatty acids and lipid biosynthesis and degradation in non-lesional skin and ferroptosis in plaque skin. VEGF-A inhibition downregulated endothelial cell apoptosis in non-lesional psoriasis skin and members of the interferon family were identified as potential regulators of the effects of VEGF-A inhibition in non-lesional skin.

CONCLUSION

Early response to VEGF-A inhibition is associated with changes in lipid metabolism in non-lesional psoriasis skin and cellular stress in psoriasis plaque. More investigation is needed to validate these findings.

Molecular mechanisms of ferroptosis in cardiovascular disease

Ferroptosis is a newly recognized type of regulated cell death that is characterized by the accumulation of iron and lipid peroxides in cells. Studies have shown that ferroptosis plays a significant role in the pathogenesis of various diseases, including cardiovascular diseases. In cardiovascular disease, ferroptosis is associated with ischemia-reperfusion injury, myocardial infarction, heart failure, and atherosclerosis. The molecular mechanisms underlying ferroptosis include the iron-dependent accumulation of lipid peroxidation products, glutathione depletion, and dysregulation of lipid metabolism, among others. This review aims to summarize the current knowledge of the molecular mechanisms of ferroptosis in cardiovascular disease and discuss the potential therapeutic strategies targeting ferroptosis as a treatment for cardiovascular disease.

Silencing of CircTRIM25/miR-138-5p/CREB1 axis promotes chondrogenesis in osteoarthritis

BACKGROUND

Dysregulated circular RNAs (circRNAs) are involved in osteoarthritis (OA) progression.

OBJECTIVE

We aimed to explore the effect of hsa_circ_0044719 (circTRIM25) on the ferroptosis of chondrocytes.

METHODS

Chondrocytes were treated with interleukin (IL)-1β to generate cell model. Cellular behaviours were measured using cell counting kit-8, enzyme-linked immunosorbent assay, relevant kits, propidium iodide staining, and immunofluorescence assay. Quantitative real-time polymerase chain reaction was performed to examine the expression of circTRIM25, miR-138-5p, and cAMP responsive element binding protein 1 (CREB1), and their interactions were assessed using luciferase reporter analysis and RNA pull-down assay.

RESULTS

CircTRIM25 was upregulated in OA tissues and IL-1β-stimulated chondrocytes. Knockdown of circTRIM25 facilitated the viability and suppressed ferroptosis and inflammation of IL-1β-induced cells. CircTRIM25 served as a sponge of miR-138-5p, which directly targets CREB1. Downregulation of miR-138-5p abrogated the effect induced by knockdown of circTRIM25. Furthermore, enforced CREB1 reversed the miR-138-5p induced effect. Moreover, knockdown of circTRIM25 attenuated cartilage injury in vivo.

CONCLUSION

Silencing of circTRIM25 inhibited ferroptosis of chondrocytes via the miR-138-5p/CREB axis and thus attenuated OA progression.

Sodium Propionate Alleviates Atopic Dermatitis by Inhibiting Ferroptosis via Activation of LTBP2/FABP4 Signaling Pathway

Background

Atopic dermatitis (AD) is a common pediatric skin disease, with recent studies suggesting a role for ferroptosis in its pathogenesis. Sodium propionate (SP) has shown therapeutic potential in AD, yet its mechanism, particularly regarding ferroptosis modulation, remains unclear. This study aims to explore whether SP alleviates AD by modulating ferroptosis-related pathways through bioinformatic and in vitro analyses.

Methods

We analyzed the GEO AD cohort (GSE107361). Ferroptosis-related genes was compiled from the GeneCards Database and SP-associated therapeutic target genes were obtained from Swiss Target Prediction. To explore potential biological mechanisms, we employed Gene Set Variation Analysis (GSVA), Gene Ontology (GO), and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses. Weighted Gene Co-expression Network Analysis (WGCNA) and differential expression analysis identified key gene modules. We also established TNF-α/IFN-γ induced AD cell models using HaCat cells and collected cell samples for further experiments.

Results

The GSVA analysis demonstrated that ferroptosis-related genes could differentiate between healthy children and those with AD. The identified module includes genes with correlated expression patterns specifically linked to AD. Analysis using three algorithms identified potential therapeutic targets of SP. We screened 51 key genes related to AD and ferroptosis, selecting cyclin-dependent kinase 1 (CDK1) and latent transforming growth factor beta binding protein 2 (LTBP2) as co-expressed genes. Machine learning identified fatty acid binding protein 4 (FABP4) as a significant gene intersection of the 51 key genes. The bioinformatics analysis results were validated through cell experiments, showing that SP treatment increased the expression of the damaged skin genes loricrin (LOR) and filaggrin (FLG).

Conclusion

Our study indicates that SP may alleviate AD symptoms by modulating ferroptosis through the LTBP2/FABP4 pathway.

Echinacoside Alleviates Metabolic Dysfunction-Associated Steatotic Liver Disease by Inhibiting Ferroptosis via Nrf2/HMOX1 Pathway

Background: Metabolic dysfunction-associated steatotic liver disease (MASLD) is a chronic liver disease characterized by hepatic lipid accumulation, and echinacoside (ECH) has demonstrated antioxidant and anti-inflammatory effects across multiple conditions, it has demonstrated hepatoprotective effects. Ferroptosis represents a novel mechanism of cell demise, differing from apoptosis and autophagy. Emerging research indicates that ferroptosis in hepatocytes plays a role in the development of alcoholic liver disease. This study aimed to reveal the effect and potential mechanism of ECH on MASLD. Methods: The effect of ECH on the viability, lipid deposition, lipid peroxidation, mitochondrial of OA/PA-treated HepG2 cells were evaluated by Cell Counting Kit-8 assay, JC-1 and immunofluorescence assay. Meanwhile, the mechanism of ECH was assessed using transmission electron microscopy and immunofluorescence analysis. Moreover, db/db mice, a spontaneous type 2 diabetes mode, were intragastrically administered ECH by 300 mg/kg or an equivalent volume of saline. Body weight, lipids, and liver function were measured. liver pathology was performed. The mechanism of ECH in vivo was analyzed using Western blot and immunofluorescence analysis in db/db mice. Results: ECH attenuated lipid deposition, lipid peroxidation and ferroptosis induced by OA/PA in HepG2 cells. Mitochondrial morphology and function in HepG2 cells were also preserved by ECH. In db/db mice model of MASLD, ECH markedly ameliorated liver hepatocellular ballooning, inflammatory cell infiltration in the portal area, and fibrous tissue proliferation. ECH also increased the expression of Nrf2, HMOX-1, SLC7A11, and GPX4, and decreased the expression of ACSL4 in liver tissues. Mechanically, ECH repressed ferroptosis by activating the Nrf2/HO-1 signaling pathway. Conclusions: Our research revealed that ECH has the capability to modulate ferroptosis via the Nrf2-HMOX1pathway, consequently mitigating the progression of MASLD. This suggests that ECH has a potential role in the treatment of MASLD.