Genome-Wide Analysis of Simple Sequence Repeats and Efficient Development of Polymorphic SSR Markers Based on Whole Genome Re-Sequencing of Multiple Isolates of the Wheat Stripe Rust Fungus

Effects of sevoflurane and isoflurane on acute myocardial infarction model establishment in mice

The selection of anesthetic drugs in the preparation of an acute myocardial infarction (AMI) model is very important. We specifically focus on various effects of sevoflurane and isoflurane in a murine AMI model, which have not been previously compared. Furthermore, we evaluated success of our AMI model using following methods: echocardiography, TTC staining, and PCR testing. The results show that compared to the isoflurane group, the sevoflurane group mice had shorter anesthetic induction(66.40 ± 2.90S vs. 125.10 ± 6.30S P < 0.0001) and recovery times(28.00 ± 1.07S vs. 56.88 ± 4.14S, P < 0.0001), lower incidence of respiratory depression (0 % vs. 50.00 %, P = 0.0325), and more successful models (93.33 % vs. 60.00 %, P = 0.0801). There were no significant differences in cardiac function, infarction area(49.41 ± 4.18 % vs. 48.66 ± 3.79 %, P = 0.5266), or inflammatory factors in the myocardial infarction area between the two groups. Sevoflurane may therefore be a better choice for the establishment of AMI models in mice.

Functional dysconnectivity of the triple network in women with premenstrual syndrome

OBJECTIVE

Premenstrual syndrome (PMS) is a risk factor for female depression, linked to neural circuit dysfunction. This study investigates PMS-related brain network patterns, focusing on the triple network's integration and segregation.

MATERIALS & METHODS

The study enrolled 56 PMS patients and 67 healthy controls (HCs), assessed via the Daily Record of Severity of Problems (DRSP). Functional MRI (fMRI) was analyzed using independent component analysis (ICA) to calculate functional connectivity (FC) and functional network connectivity (FNC) within and between brain networks. Correlation analysis examined links between imaging metrics and DRSP scores.

RESULTS

Compared with HCs, PMS patients showed increased FC in the left inferior frontal gyrus of the salience network (SN). Additionally, there was increased FNC between the dorsal default mode network (dDMN), while a decrease was observed between the right execution network (RECN) and SN. Conversely, the FNC between RECN and dDMN was enhanced. Significant correlations were found between the FC values within the SN and DRSP scores. Similarly, the abnormal FNC pattern also correlated significantly with DRSP scores.

CONCLUSION

Triple-network dysconnectivity may serve as a biomarker for PMS, offering insights into its pathophysiology and potential targets for network-based neuromodulation therapies.

CLINICAL RELEVANCE STATEMENT

Identifying network dysconnectivities in PMS offers potential biomarkers for diagnosis and targets for neuromodulation therapy, ultimately improving symptom management and patient outcomes.

Cilostazol protective effect on nedaplatin-induced genotoxicity in cultured human lymphocytes

Background

Nedaplatin has demonstrated remarkable efficacy in combating various malignancies. However, the administration of nedaplatin has been associated with the induction of DNA damage within normal cells. Cilostazol is a phosphodiesterase III inhibitor with an antioxidant mechanism that could protect cells from genotoxicity. We aimed to evaluate the genotoxic effect of nedaplatin on cultured human lymphocytes and the potential protective effect of cilostazol on chromosomal damage induced by nedaplatin.

Methods

The proposed nedaplatin's genotoxic effect was studied in vitro by evaluating the frequencies of sister chromatid exchanges (SCEs) in human cultured lymphocytes. Both the mitotic and proliferative indices (MI and PI, respectively) were used to assess the cytotoxic effects of nedaplatin.

Results

Nedaplatin significantly increased the frequency of SCEs compared to control and cilostazol-treated cells. The chromosomal injury induced by nedaplatin was significantly reduced by pretreatment of cells with cilostazol (P < 0.0001). Treating with cilostazol alone also reduced the frequency of SCEs, MI, and PI compared to the control group. Nedaplatin induced significant decreases in the MI and PI compared to the control group. Pretreatment with cilostazol partially debilitated the nedaplatin-induced changes in MI but not PI.

Conclusion

Cilostazol ameliorated the genotoxicity of nedaplatin in cultured human lymphocytes.

A thorough analysis of data on the correlation between IL-16 polymorphisms and the susceptibility to knee osteoarthritis: A meta-analysis

BACKGROUND

Knee osteoarthritis (KOA) is a multifactorial condition affected by genetic and environmental factors. Studies have explored the relationship between IL-16 genetic polymorphisms and KOA risk, but findings have been inconclusive. This meta-analysis seeks to assess the association between IL-16 polymorphisms and KOA risk.

METHODS

A systematic literature search was conducted in several databases, including PubMed, Web of Science, EMBASE, SciELO, and CNKI, for studies published until June 1, 2024. Two independent researchers identified peer-reviewed articles in English, Portuguese, and Chinese using keywords related to "Knee Osteoarthritis" and "Interleukin 16." Relevant references were also manually reviewed for additional studies. Pooled odds ratios (ORs) and 95 % confidence intervals (CIs) were calculated to assess the association strength. Additionally, minor allele frequencies (MAFs), Hardy-Weinberg equilibrium (HWE) data, heterogeneity, publication bias, and Newcastle-Ottawa scores (NOS) were evaluated.

RESULTS

This analysis included 15 case-control studies, encompassing 1747 individuals with KOA and 1627 healthy controls. Within these studies, five investigated the genetic variations rs11556218 (584 cases, 542 controls), rs4778889 (583 cases, 543 controls), and rs4072111 (580 cases, 542 controls). The findings suggest that the IL-16 variants rs11556218 and rs4072111 may offer protection against KOA development, while no link exists between the rs4778889 variant and KOA susceptibility. The variability in IL-16 polymorphisms, particularly in Asian and Chinese populations, indicates different genetic associations with KOA risk. Strong results, supported by sensitivity analyses and the absence of significant publication bias, emphasize the influence of study methods on the relationship between these polymorphisms and KOA risk.

CONCLUSIONS

The analysis of three polymorphisms-rs11556218, rs4778889, and rs4072111-shows varying associations with KOA. Rs11556218 and rs4072111 offer protective effects in non-Asian populations, while rs4778889 shows no significant association across cohorts. Notably, rs11556218 and rs4072111 do not correlate with KOA susceptibility in Asian and Chinese populations, suggesting ethnic differences in genetic influences on KOA.

Functions of the fusogenic and non-fusogenic activities of Syncytin-1 in human physiological and pathological processes

Human endogenous retroviruses (HERVs), which represent the genetic remnants of ancient viral infections, constitute approximately 8 % of the human genome. Among the proteins encoded by these viruses, Syncytin-1, encoded by the env gene of the HERV-W family, functions as a vital fusion protein in placental development, in which it plays a pivotal role in facilitating the fusion of trophoblast cells to form the syncytiotrophoblast that is essential for maintaining the structural integrity and functional viability of the placenta. Recent studies have shown that in addition to its expression in the placenta, Syncytin-1 also plays key roles in a range of different tissues and cell types, influencing biological processes such as cell proliferation, apoptosis, and immune regulation. Abnormal expression of Syncytin-1 has been closely linked to the onset, progression, and metastasis of tumors, potentially promoting tumor invasion via mechanisms involving cell fusion and modulation of the immune microenvironment. Moreover, associations have been established between Syncytin-1 and neurological disorders, including multiple sclerosis and schizophrenia, in which it modulates neuroinflammation. In this review, we systematically examine the molecular structure and functional attributes of Syncytin-1, emphasizing its roles in cell fusion, tumor progression, and immune regulation, and discuss its potential applications as a therapeutic target and diagnostic biomarker.

Evaluation of phylogroup, sequence type, resistome and virulome in Escherichia coli resulting in feline bacterial cystitis and subclinical bacteriuria

There is limited information on E. coli from feline urine and whether associated virulence and antimicrobial resistance patterns contribute to disease manifestations. This study aimed to characterise E. coli isolates, sequence types (ST), antimicrobial resistance (ARG) and virulence associated genes (VAG) from cats in primary care with subclinical bacteriuria (SBU) or lower urinary tract infection (LUTI). Whole genome sequencing (WGS) was performed on E. coli isolates that had been stored from a longitudinal health monitoring programme. Clinical records were reviewed to determine underlying disease conditions, phenotypic susceptibility and SBU and LUTI status. Descriptive review of phylogroup and ST was assessed together with evaluation of ARG and VAG by ST and based on SBU or LUTI status. WGS data was available for 152 E. coli isolates from cats (n = 26 with LUTI, n = 126 with SBU). The most common phylogroup was B2 with ST73, ST80, ST83 and ST127 predominating and ST80 being associated with clinical LUTI. Evaluating all isolates, there was no difference in prevalence of MDR status, total VAG or ARG count from cats with SBU or LUTI. Exploring individual VAG, ibeA, an invasin, and kpsT, part of the group 2 polysaccharide capsule, were associated with LUTI whilst P-fimbrial genes (pap) were associated with SBU. Based on this study, evidence is limited that expression of LUTI is directly related to ST or virulome and there is no evidence for increased resistome with SBU. However, low prevalence of cats with clinical LUTI may have precluded identification of associations.

The effect of mitochondrial-associated endoplasmic reticulum membranes (MAMs) modulation: New insights into therapeutic targets for depression

Depression is a prevalent mental disorder with high morbidity and mortality and its pathogenesis remains exactly unclarified. However, mitochondria and endoplasmic reticulum (ER) are two highly dynamic organelles that perform an indispensable role in the development of depression. Mitochondrial dysfunction and ER stress are recognized as vital pathological hallmarks in depression. The changes of intracellular activities such as mitochondrial dynamics, mitophagy, energy metabolism and ER stress are closely correlated with the progression of depression. Moreover, organelles interactions are conducive to homeostasis and cellular functions, and mitochondrial-associated endoplasmic reticulum membranes (MAMs) serve as signaling hubs of the two organelles and the coupling of the pathological progression. The main roles of MAMs are involved in metabolism, signal transduction, lipid transport, and maintenance of its structure and function. At present, accumulating studies elucidated that MAMs have gradually become a novel therapeutic target in treatment of depression. In the review, we focus on influence of mitochondria dysfunction and ER stress on depression. Furthermore, we discuss the underlying role of MAMs in depression and highlight natural products targeting MAMs as potential antidepressants to treat depression.

Litchi40K v1.0: a cost-effective, flexible, and versatile liquid SNP chip for genetic analysis and digitalization of germplasm resources in litchi

Genetic breeding and molecular identification in varieties depend on high-performance genotyping tools. The high heterozygosity of the litchi genome contributes to increased resequencing costs and elevated error rates in hybridization-based genotyping methods. In this study, a liquid chip named Litchi40K v1.0 was developed with high-depth resequencing data from 875 litchi samples, and its efficacy was validated across three different populations. In the L. chinensis var. fulvosus population, three subpopulations characterized by spatial distribution, and a total of 1110 genes were identified in the genomic regions with subpopulation differentiation. Additionally, a total of 30 significant signals associated with diverse agronomic traits were identified. The H002 haplotype of LITCHI02696, dominant in the Sub2 subgroup, significantly increased the soluble solid content in the L. chinensis var. fulvosus population. In a hybrid F1 population, a high-density genetic map was constructed and 79 dwarfing-related QTLs were identified with the liquid chip. An NAC transcription factor was identified as a candidate gene with a heterozygous frameshift variant in the male parent. To facilitate the digitization of germplasm resources, 384 SNPs were selected, and the DNA fingerprint map revealed clear genetic relationships and a total of 10 potential synonym groups or instances of bud mutations were identified in 164 main cultivated litchi varieties. This study provides cost-effective, flexible, and versatile liquid chip for genetic analysis and digitalization of germplasm resources in litchi.

New biomarkers in IgA nephropathy

Currently, IgA nephropathy (IgAN) is the most common cause of chronic renal failure in patients with primary glomerulonephritis. However, IgAN diagnosis is usually performed by collecting a renal biopsy as gold standard to visualize pathological changes in the glomeruli. The randomized nature of this invasive procedure in clinical practice, together with the need to exclude patients with contraindications, often results in a limited number of eligible people. Therefore, over the past two decades, researchers have explored new biomarkers for IgAN to meet the urgent clinical need for rapid diagnosis and prognosis, as well as realistic prediction of IgAN progression. In addition to traditional common markers with low specificity to detect renal diseases, the classical antibody targeting galactose-deficient IgA1 has been progressively discovered. In addition, new types of diagnostic or prognostic biomarkers are emerging, including microRNA, complement factors, proteases, inflammatory molecules and serum or urinary metabolite profiles.

Human Enteric Glia Diversity in Health and Disease: New Avenues for the Treatment of Hirschsprung Disease

BACKGROUND & AIMS

The enteric nervous system (ENS), which is composed of neurons and glia, regulates intestinal motility. Hirschsprung disease (HSCR) results from defects in ENS formation; however, although neuronal aspects have been studied extensively, enteric glia remain disregarded. This study aimed to explore enteric glia diversity in health and disease.

METHODS

Full-thickness intestinal resection material from pediatric controls and patients with HSCR was collected, dissociated, and enriched for the ENS population through fluorescence-activated cell sorting. Single-cell RNA sequencing was performed to uncover the transcriptomic diversity of the ENS in controls and HSCR patients, as well as in wild-type and ret mutant zebrafish. Immunofluorescence and fluorescence in situ hybridization confirmed the presence of distinct subtypes.

RESULTS

Two major enteric glial classes emerged in the pediatric intestine: Schwann-like enteric glia, which are reminiscent of Schwann cells, and enteric glia expressing classical glial markers. Comparative analysis with previously published datasets confirmed our classification and revealed that although classical enteric glia are predominant prenatally, Schwann-like enteric glia become more abundant postnatally. In HSCR, ganglionic segments mirrored controls and aganglionic segments featured only Schwann-like enteric glia. Leveraging the regenerative potential of Schwann cells, we explored therapeutic options using a ret mutant zebrafish. Prucalopride, a serotonin-receptor (5-HT) agonist, induced neurogenesis partially rescuing the HSCR phenotype in ret+/- mutants.

CONCLUSIONS

Two major enteric glial classes were identified in the pediatric intestine, highlighting the significant postnatal contribution of Schwann-like enteric glia to glial heterogeneity. Crucially, these glial subtypes persist in aganglionic segments of patients with HSCR, offering a new target for their treatment using 5-HT agonists.

A culturally sensitive act-belong-commit-based school intervention reduces the burden of anxiety and depression in adolescents: A pilot cluster-randomized trial from Uganda

INTRODUCTION

Schools can be pivotal in addressing mental health challenges, especially in low-income settings like Uganda. However, randomized controlled trials tailored to cultural and contextual factors are scarce. This pilot cluster-randomized trial examines the impact of a culturally sensitive Act-Belong-Commit (ACT) intervention, combined with physical activity, sleep hygiene and stress management measures on anxiety and depression among Ugandan adolescents attending secondary school.

METHODS

A total of 2598 adolescents (1295 intervention; 1303 control; 1199 boys [46.1 %]; mean age 16.3 ± 1.0 years) from four secondary schools were randomized by school to either a 12-week, weekly two-hour teacher- and peer-led ACT intervention or a care-as-usual control. Anxiety (GAD-7) and depression (PHQ-9-A) were measured at baseline and immediately post-intervention. Childhood trauma (CTQ-SF), self-reported health, wealth, and food security were assessed at baseline. Linear mixed modeling was used to evaluate intervention effects.

RESULTS

At baseline, the mean GAD-7 score was 6.4 ± 4.4 and PHQ-9-A was 7.4 ± 5.1. The intervention group showed greater improvements in mental health, with moderate effects on anxiety (Cohen's d = 0.50, 95 % CI = 0.42-0.57) and small effects on depression (Cohen's d = 0.44, 95 % CI = 0.36-0.52). Moderation analyses were based on pre-specified baseline variables.

CONCLUSION

This pilot trial provides preliminary evidence that a culturally adapted ACT intervention combined physical activity, sleep hygiene and stress management measures may be a promising whole-school approach to reduce anxiety and depression in adolescents. Further trials with more clusters are needed.

Development of antibiotic resistome in premature infants

Preterm birth is a major concern in neonatal care, significantly impacting infant survival and long-term health. The gut microbiome, essential for infant development, often becomes imbalanced in preterm infants, making it crucial to understand the effects of antibiotics on its development. Our study analyzed weekly, 6-month, and 1-year stool samples from 100 preterm infants, correlating clinical data on antibiotic use and feeding patterns. Comparing infants who received no antibiotics with those given empirical post-birth treatment, we observed notable alterations in the gut microbiome's composition and an increase in antibiotic resistance gene abundance early in life. Although these effects diminished over time, their long-term clinical impacts remain unclear. Human milk feeding was associated with beneficial microbiota like Actinobacteriota and reduced antibiotic resistance genes, underscoring its protective role. This highlights the importance of judicious antibiotic use and promoting human milk to foster a healthy gut microbiome in preterm infants.

A novel F-box gene, SlSE2.2, is responsible for the stigma exsertion degree in tomato (Solanum lycopersicum)

Tomato stigma exsertion is an important trait in positional sterility genotypes, which can eliminate the need for manual emasculation and promote hybrid production. In this study, we discovered a new tomato accession, J59, with a stably inherited stigma exsertion trait. To explore the regulatory genes of the stigma exsertion trait, J59 and inserted stigma genotypes M82 were crossed to obtain mapping populations. Through three years mapping, a quantitative trait locus (QTL) associated with the stigma exsertion trait was narrowed down to a 52.635 kb interval on chromosome 2, Solyc02g087270 was identified as the candidate gene responsible for this trait, named SlSE2.2. This gene encoded an F-box protein of the FBA subfamily. Sequences analysis revealed that an 11 bp deletion occurred in the first exon of SlSE2.2 in J59, resulting in premature termination of translation. Subcellular localization revealed that SlSE2.2 is located to the nucleus. Knockout of SlSE2.2 increased anther and style lengths, which reduced the values of anther length minus pistil length, changing the relative length of anthers and pistils, called stigma exsertion degree, whereas, overexpression of SlSE2.2 showed the opposite phenotype. Hormone levels analysis revealed that SlSE2.2 negatively modulated IAA, ETH, and JA levels and positively modulated ABA content. Transcriptomic analysis showed that SlSE2.2 affected the expression of SlIAA19, SlIAA36, SlETR6, SlJAZ, and SlSnRK2 related to the hormone signal transduction. This study identified the important role of a new gene, SlSE2.2, which provided a helpful insight to explore the regulatory mechanisms of stigma exsertion degree in tomato.

Photothermal-enhanced ROS storm by hyaluronic acid-conjugated nanocatalysts to amplify tumor-specific photo-chemodynamic therapy and immune response

Integrating photodynamic therapy (PDT) and chemodynamic therapy (CDT) shows promising potential in tumor treatment. Nevertheless, the lack of specific tumor targeting, serious photobleaching, and poor photothermal effect of photosensitizers, the intracellular low Fenton reaction efficiency, and glutathione (GSH)-elicited reactive oxygen species (ROS) depletion profoundly restrict ROS-mediated cancer therapy. To enhance ROS generation with the assistance of photothermal therapy (PTT), the hyaluronic acid (HA)-decorated Fe-MIL-88B (MIL) nanocatalysts were fabricated for tumor-targeted delivery of photosensitizer IR820. The IR820@HA-coated MIL (IHM) nanocatalysts remarkably enhanced the photothermal conversion efficacy and singlet oxygen (1O2) production of IR820 and lowered IR820 photobleaching. The IHM nanocatalysts promoted the conversion of H2O2 into toxic ·OH upon thermo/acidity-enhanced Fe3+-mediated Fenton reaction and consumed GSH via Fe3+-elicited GSH oxidation. After being internalized by 4 T1 cancer cells via CD44-mediated endocytosis, the IHM nanocatalysts under irradiation of near-infrared (NIR) laser prominently produced hyperthermia and strong ROS storm, thereby causing apoptosis and ferroptosis via mitochondria damage and lipid peroxidation, and inducing immunogenic cell death (ICD). Through HA-mediated tumor targeting, the IHM nanocatalysts effectively accumulated in 4 T1 tumor and inhibited tumor growth and lung metastasis by PTT-enhanced PDT/CDT combined with ferroptosis and ICD-amplified antitumor immune response, showing great promise in future tumor treatment.

Genome-wide association analysis identified the involvement of MRPS22 in the regulation of Muscovy duck broodiness

Compared to Chinese domesticated duck, Muscovy duck is the only species that retains the broodiness characteristic. Strong broodiness seriously limits its reproductive performance. In order to explore the molecular mechanisms that regulate broody behavior in Muscovy duck, this study used whole genome resequencing (WGRS) to obtain genomic variation sites of Muscovy ducks and conducted association analysis with broody traits. A total of 6,131,623 Single Nucleotide Polymorphisms (SNPs)were obtained from 295 female Muscovy ducks. After genome wide association study (GWAS) with the total broody days, average broody days, broody frequency and the first day of broodiness, 39, 130, 29 and 138 significant SNPs were obtained, respectively. The key genes annotated to these SNPs loci include NCOA6, MRPS22, SCAP, CRY2, CK1δ and EZH1, which could be candidate genes regulating the broodiness of Muscovy ducks. Functional analysis showed that over expression of MRPS22 upregulated the expression of CYP19A1 to promote the synthesis of intracellular estradiol, and downregulated the expression of CYP11A1 and 3β-HSD to inhibit the synthesis of progesterone to regulate broodiness of Muscovy ducks. The genetic polymorphism results showed that MRPS22: g.19000662G>A was significantly associated with average broody days. The average broody days in GA mutant ducks increased by an average of 2.23 days compared to wild GG type, which can be used for molecular marker for broody behavior selection. In conclusion, our study revealed MRPS22 regulated the broody performance by affecting the synthesis of estradiol and progesterone, and g.19000662G>A in MRPS22 was significantly associated with average broody days of Muscovy duck.

The dynamic duo: Decoding the roles of hypoxia-inducible factors in neonatal hypoxic-ischemic brain injury

Neonatal hypoxic-ischemic encephalopathy (HIE) results in considerable mortality and neurodevelopmental disability, with a particularly high disease burden in low- and middle-income countries. Improved understanding of the pathophysiology underlying this injury could allow for improved diagnostic and therapeutic options. Specifically, hypoxia-inducible factors (HIF-1α and HIF-2α) likely play a key role, but that role is complex and remains understudied. This review analyses the recent findings seeking to uncover the impacts of HIF-1α and HIF-2α in neonatal hypoxic-ischemic brain injury (HIBI), focusing on their cell specific expression, time-dependant activities, and potential therapeutic implications. Recent findings have revealed temporal patterns of HIF-1α and HIF-2α expression following hypoxic-ischemic injury, with distinct functions for HIF-1α versus HIF-2α within the neonatal brain. Ongoing studies aimed at further revealing the relationship between HIF isoforms and developing targeted interventions offer promising avenues for therapeutic management which could improve long-term neurological outcomes in affected newborns.

Selenium deficiency impedes maturation of parvalbumin interneurons, perineuronal nets, and neural network activity

Selenoproteins are fundamental players in redox signaling that are essential for proper brain development and function. They are indispensable for the vitality of GABAergic parvalbumin-expressing interneurons (PVIs), a cell type characterized by fast-spiking activity and heightened rates of metabolism. During development, PVIs are preferentially encapsulated by specialized extracellular matrix structures, termed perineuronal nets (PNNs), which serve to stabilize synaptic structure and act as protective barriers against redox insults. Consequently, alterations in PVIs and PNNs are well chronicled in neuropsychiatric disease, and evidence from animal models indicates that redox imbalance during adolescence impedes their maturation. Herein, we examined the influence of selenium on maturation of neural network structure and activity in primary cortical cultures. Cultures grown in selenium-deficient media exhibited reduced antioxidant activity, impaired PNN formation, and decreased synaptic input onto PVIs at 28 days in vitro, which coincided with increased oxidative stress. Parallel studies to monitor longitudinal maturation of in vitro electrophysiological activity were conducted using microelectrode arrays (MEA). Selenium content affected the electrophysiological profile of developing cultures, as selenium-deficient cultures exhibited impairments in long-term potentiation in conjunction with reduced spike counts for both network bursts and in response to stimulation. Finally, similar PNN deficits were observed in the cortex of mice raised on a selenium-deficient diet, providing corroborative evidence for the importance of selenium in PNN development. In sum, these findings show the vital role of selenium for the development of GABAergic inhibitory circuits.

Arachidonic acid in aging: New roles for old players

BACKGROUND

Arachidonic acid (AA), one of the most ubiquitous polyunsaturated fatty acids (PUFAs), provides fluidity to mammalian cell membranes. It is derived from linoleic acid (LA) and can be transformed into various bioactive metabolites, including prostaglandins (PGs), thromboxanes (TXs), lipoxins (LXs), hydroxy-eicosatetraenoic acids (HETEs), leukotrienes (LTs), and epoxyeicosatrienoic acids (EETs), by different pathways. All these processes are involved in AA metabolism. Currently, in the context of an increasingly visible aging world population, several scholars have revealed the essential role of AA metabolism in osteoporosis, chronic obstructive pulmonary disease, and many other aging diseases.

AIM OF REVIEW

Although there are some reviews describing the role of AA in some specific diseases, there seems to be no or little information on the role of AA metabolism in aging tissues or organs. This review scrutinizes and highlights the role of AA metabolism in aging and provides a new idea for strategies for treating aging-related diseases.

KEY SCIENTIFIC CONCEPTS OF REVIEW

As a member of lipid metabolism, AA metabolism regulates the important lipids that interfere with the aging in several ways. We present a comprehensivereviewofthe role ofAA metabolism in aging, with the aim of relieving the extreme suffering of families and the heavy economic burden on society caused by age-related diseases. We also collected and summarized data on anti-aging therapies associated with AA metabolism, with the expectation of identifying a novel and efficient way to protect against aging.

Deciphering a cryptic minefield: A guide to Cryptosporidium gp60 subtyping

For 25 years, analysis of the gp60 gene has been the cornerstone of Cryptosporidium subtyping, particularly for Cryptosporidium hominis and Cryptosporidium parvum, during population-based and epidemiological studies. This gene, which encodes a 60 kDa glycoprotein, is highly polymorphic with several variable features that make it particularly useful for differentiating within Cryptosporidium species. However, while this variability has proven useful for subtyping, it has on occasion resulted in alternative interpretations, and descriptions of novel and unusual features have been added to the nomenclature system, resulting in inconsistency and confusion. The components of the gp60 gene sequence used in the nomenclature that are discussed here include "R" repeats, "r" repeats, alphabetical suffixes, "variant" designations, and the use of the Greek alphabet as a family designation. As the subtyping scheme has expanded over the years, its application to different Cryptosporidium species has also made the scheme more complex. For example, key features may be absent, such as the typical TCA/TCG/TCT serine microsatellite that forms a major part of the nomenclature in C. hominis and C. parvum. As is to be expected in such a variable gene, different primer sets have been developed for the amplification of the gp60 in various species and these have been collated. Here we bring together all the current components of gp60, including a guide to the nomenclature in various species, software to assist in analysing sequences, and links to useful reference resources with an aim to promote standardisation of this subtyping tool.

The quest to define cancer-specific systems parameters for personalized dosing in oncology

INTRODUCTION

Clinical trials in oncology initially recruit heterogeneous populations, without catering for all types of variability. The target cohort is often not representative, leading to variability in pharmacokinetics (PK). To address enrollment challenges in clinical trials, physiologically based pharmacokinetic models (PBPK) models can be used as a guide in the absence of large clinical studies. These models require patient-specific systems data relevant to the handling of drugs in the body for each type of cancer, which are scarce.

AREAS COVERED

This review explores system parameters affecting PK in cancer and highlights important gaps in data. Changes in drug-metabolizing enzymes (DMEs) and transporters have not been fully investigated in cancer. Their impaired expression can significantly affect capacity for drug elimination. Finally, the use of PBPK modeling for precision dosing in oncology is highlighted. Google Scholar and PubMed were mainly used for literature search, without date restriction.

EXPERT OPINION

Model-informed precision dosing is useful for dosing in sub-groups of cancer patients, which might not have been included in clinical trials. Systems parameters are not fully characterized in cancer cohorts, which are required in PBPK models. Generation of such data and application of cancer models in clinical practice should be encouraged.

Tongxinshu capsules in the treatment of stable angina pectoris due to qi deficiency and blood stasis in coronary heart disease: A multicenter, randomized, double-blind, placebo-controlled trial

OBJECTIVE

To evaluate the efficacy and safety of Tongxinshu (TXS) capsules as an adjunct treatment for stable angina pectoris (SA) with Qi deficiency and blood stasis.

METHODS

From September 2020 to January 2024, a multicenter, randomized, double-blind, placebo-controlled trial was conducted in three hospitals in China. A total of 120 patients with Qi deficiency and blood stasis-type SA were randomly assigned to the TXS capsule group or the placebo group (1:1). All patients received standardized Western medication and either TXS capsules or placebo capsules, administered as two capsules three times daily for eight weeks. The primary outcome measure was the angina stability score on the Seattle Angina Questionnaire (SAQ). Secondary outcome measures included other SAQ dimensions, traditional Chinese medicine (TCM) syndrome scores, quality of life assessed by the Minnesota Living with Heart Failure Questionnaire (MLHFQ), echocardiography, serum IL-6, lipid profile, and electrocardiogram changes. SAQ and TCM syndrome scores were measured at weeks 0, 4, and 8, with generalized estimating equations used for comparisons between groups at each time point. Other indices were collected at weeks 0 and 8. Adverse events (AEs) were meticulously recorded throughout the trial.

RESULTS

A total of 114 patients completed the trial, with 58 in the TXS capsule group and 56 in the placebo group. Over time, both groups exhibited significant improvements in angina stability (P < 0.05), with the TXS group showing more pronounced improvements at weeks 4 and 8 compared to the placebo group (P < 0.05). Compared to baseline, both groups showed significant improvements in other SAQ dimensions, TCM syndrome scores, and MLHFQ scores (P < 0.05) after 8 weeks of treatment. Between-group comparisons revealed that the TXS group had superior improvements in physical limitation, treatment satisfaction, and TCM syndrome scores at weeks 4 and 8 (P < 0.05). Angina frequency showed significant improvement only at week 4 (P < 0.05). There was no significant difference in disease perception between the groups (P > 0.05). At week 8, the TXS group demonstrated greater improvements in MLHFQ physical domain, emotional domain, and total scores compared to the placebo group (P < 0.05). No significant differences were found between the groups in other domains (P > 0.05). Additionally, compared to baseline, the placebo group showed reductions in IL-6 and LVFS after treatment (P < 0.05). No significant differences were observed between the groups in routine blood and urine tests, electrolytes, liver and kidney functions, and electrocardiograms post-treatment (P > 0.05). Three AEs were reported in the placebo group, while no AEs occurred in the TXS group, with no statistical difference between groups (P > 0.05).

CONCLUSION

The addition of TXS capsules to conventional Western medication significantly improves the severity and frequency of angina attacks, clinical symptoms, and quality of life in SA patients, with good safety (Registration number: ChiCTR2000039731).

Role of the sulfur-containing amino acid-ROS axis in cancer chemotherapeutic drug resistance

Chemotherapeutic drug resistance remains a major barrier to effective cancer treatment. Drug resistance could be driven in part by adaptive redox remodeling of cancer cells. Paradoxically, drug-resistant malignancies exhibit elevated reactive oxygen species (ROS), as well as amplified antioxidant defenses, which enable cancer cell survival under therapeutic stress. Central to this adaptation is glutathione (GSH), the predominant cellular antioxidant, whose synthesis relies on sulfur-containing amino acids (SAAs) - methionine and cysteine. This review delineates the metabolic interplay between methionine and cysteine in the transsulfuration pathway, highlighting their roles as precursors in GSH biosynthesis. We systematically summarize the key enzymes that drive GSH production and their contributions to resistance against platinum-based drugs and other chemotherapeutics. In addition to GSH synthesis, we summarize the roles of GSH antioxidant systems, including glutathione peroxidases (GPXs), peroxiredoxins (PRDXs), and thioredoxins (TRXs), which are critical in chemotherapeutic drug resistance through ROS scavenging. Recent advances reveal that targeting these enzymes, by pharmacologically inhibiting transsulfuration enzymes or disrupting GSH-dependent antioxidant cascades, can sensitize resistant cancer cells to ROS-mediated therapies. These findings not only clarify the mechanistic links between SAA metabolism and redox adaptation but also provide practical approaches to overcome chemotherapeutic drug resistance. By analyzing metabolic and redox vulnerabilities, this review highlights the therapeutic potential to restore chemosensitivity, offering new options in precision oncology medicine.

The role of hypoxia/ischemia preconditioning in ischemic stroke

Ischemic stroke can cause damage to neurons, resulting in neurological dysfunction. The main treatments in the acute phase include intravenous thrombolysis, endovascular stent-assisted vascular thrombectomy and antiplatelet therapy. Due to the limitations of the time window and the risk of early intracranial hemorrhage, finding active treatment plans is crucial for improving therapy. Preconditioning can enhance the tolerance to acute injuries such as ischemic stroke and mechanical brain injury. This tolerance, induced by stressors like ischemia and hypoxia, can become an effective and convenient treatment approach for ischemic stroke. The molecular mechanisms involved in preconditioning are extremely complex. This article focuses on the main preconditioning treatment methods for ischemic stroke, discusses the specific molecular mechanisms of different treatment methods, and explores their action pathways and effects on corresponding target cells, thus opening up a brand-new direction for the treatment strategies of ischemic stroke.

A Cross-Generational Methylomic Signature of Infant Maltreatment in Newborn Rhesus Macaques

BACKGROUND

Early-life adversity (ELA) results in detrimental physical and mental health outcomes. The impact of ELA can reverberate across generations, with epigenetic modifications being one of the proposed biological correlates of exposure to ELA. Here, we bridge the translational gap between rodent models and clinical studies by utilizing a nonhuman primate model to study the cross-generational epigenetic and functional footprints of physical maltreatment and neglect.

METHODS

Methylomic profiling was performed using the Illumina MethylationEPIC array platform, adapted for rhesus macaques. A total of 339,081 individual methylation sites were compared between newborn offspring of maltreated (n = 14, 8 female) and nonmaltreated (n = 12, 5 female) mothers.

RESULTS

We identified 409 differentially methylated positions (DMPs) and 7 differentially methylated regions associated with the cross-generational impact of infant maltreatment. A subsequent pathway enrichment analysis revealed 78 enriched pathways. Neonatal blood cortisol levels were significantly lower in animals with a maltreated mother (maltreated n = 13, 7 female; control n = 9, 4 female). Of the 409 DMPs, 46 showed an association with blood cortisol levels, 19 of which were found to potentially mediate the association between ancestral infant maltreatment and decreased blood cortisol levels. Finally, 137 of the DMPs were associated with a human trait in the EWAS Atlas, including child abuse and glucocorticoid exposure.

CONCLUSIONS

These findings provide deeper insight into the role of epigenetic alterations across generations after environmental insults and how this may impact the development of phenotypic alterations in offspring of individuals exposed to maltreatment.

Potential therapeutic effect of dimethyl fumarate on Treg/Th17 cell imbalance in biliary atresia

The imbalance between Tregs and proinflammatory Th17 cells in children with biliary atresia (BA) causes immune damage to cholangiocytes. Dimethyl fumarate (DMF), an immunomodulatory drug, regulates the Treg/Th17 balance in diseases like multiple sclerosis (MS). This study explores DMF's effect on Treg/Th17 balance in BA and its potential mechanism. The differential gene expression profiles in liver of BA and choledochal cyst (CC) patients were analyzed by single-cell RNA sequencing (scRNA-seq). Treg and Th17 cell frequencies in BA hilar lymph nodes (LNs) were determined by flow cytometry. CD3+ T cells were isolated from BA hilar LNs and treated with DMF in vitro to observe their differentiation. The effects of DMF were evaluated on BA mouse model, and enzyme-linked immunosorbent assay to measure biochemical markers and cytokine profiles. The Treg/Th17 ratio in the liver was determined by flow cytometry. Nuclear factor erythroid 2-related factor 2 (Nrf2) and its downstream antioxidant genes solute carrier family 7 member 1 (Slc7a11), heme oxygenase - 1 (Hmox1) was validated by q-PCR and Western blot. ScRNA-seq showed CD4+ T cells in BA liver were enriched in antioxidant pathways. The Treg/Th17 ratio in BA hilar LNs was significantly reduced compared to CC. In vitro, DMF promoted Treg differentiation and inhibited Th17 differentiation. In vivo, the Treg/Th17 ratio increased in the liver of the DMF 40 mg/kg group. In the 40 mg/kg DMF group, interleukin-17 A (IL-17 A) expression decreased as seen in pathological staining. DMF increased Nrf2, Hmox1, Slc7a11 mRNA and protein levels in DMF 40 mg/kg group. There is a Treg/Th17 imbalance in BA patients' hilar LNs, which DMF can restore in vitro. DMF improves the survival rate of BA mice and corrects the Treg/Th17 imbalance, possibly via the Nrf2/antioxidant response elements (ARE) pathway.

Molecular insights into vasicine and butyrylcholinesterase interactions: A complimentary biophysical, multi-spectroscopic, and computational study

Butyrylcholinesterase (BChE) plays a pivotal role in regulating acetylcholine (ACh) levels during the progression of Alzheimer's disease (AD), so emerged as an attractive target in AD treatment. Vasicine, a naturally occurring pyrroloquinazoline alkaloid, was identified as a natural BChE inhibitor (IC50 = 1.47 ± 0.37 μM) from Traditional Chinese Medicine database. No any detailed research concerning the binding behavior of BChE with small molecule. As the first case, the inhibitory mechanism of vasicine on BChE was investigated using multi-spectroscopic methods (including fluorescence quenching, ANS fluorescence probe, three-dimensional fluorescence, time-resolved fluorescence, circular dichroism), isothermal titration calorimetry, surface plasmon resonance, and computational approaches. As a reversible and mixed inhibitor, vasicine displayed moderate affinity for BChE with an affinity constant KD of 2.111 μM, its binding process was characterized as a spontaneous exothermic reaction with reduced entropy, primarily driven by hydrogen bonding interactions. Vasicine quenched the fluorescence of BChE through both static and dynamic quenching mechanisms, leading to an increase in the α-helix content and surface hydrophobicity of BChE. Furthermore, the fluctuation of the skeleton atoms in the vasicine-BChE complex system remained stable, indicating good stability within the simulated physiological environment. In addition, vasicine exerted good safety for PC12 cells. Above findings provide molecular insights into the inhibitory mechanism of vasicine against BChE for the first time, and offer valuable information for future structure modification and therapeutic applications of vasicine as a BChE inhibitor.

Comparative Analysis of the Total Proteome in Nonalcoholic Steatohepatitis: Identification of Potential Biomarkers

Nonalcoholic fatty liver disease is a hepatic condition characterized by excessive fat accumulation in the liver with advanced stage nonalcoholic steatohepatitis (NASH), potentially leading to liver fibrosis, cirrhosis, and cancer. Currently, the identification and classification of NASH require invasive liver biopsy, which has certain limitations. Mass spectrometry-based proteomics can detect crucial proteins and pathways implicated in NASH development and progression. We collected the liver and serum samples from choline-deficient, L-amino acid-defined high-fat diet fed NASH C57BL/6J mice and human serum samples to examine proteomic alterations and identify early biomarkers for NASH diagnosis. In-depth targeted multiple reaction monitoring scanning and immunoblotting assays were used to verify the biomarker candidates from mouse liver and serum samples, and enzyme-linked immunosorbent assay (ELISA) was employed to analyze human serum samples. The multiple reaction monitoring analysis of NASH liver revealed 50 proteins with altered expression (21 upregulated and 29 downregulated) that are involved in biological processes such as detoxification, fibrosis, inflammation, and fatty acid metabolism. Ingenuity pathway analysis identified impaired protein synthesis, cellular stress and defense, cellular processes and communication, and metabolism in NASH mouse liver. Immunoblotting analysis confirmed that the expression of proteins associated with fatty acid metabolism (Aldo B and Fasn) and urea cycle (Arg1, Cps1, and Otc) was altered in the mouse liver and serum. Further analysis on human serum samples using ELISA confirmed the increased expression of multiple proteins, including Aldo B, Asl, and Lgals3, demonstrating values of 0.917, 0.979, and 0.965 of area under the curve in NASH diagnosis. These findings offer valuable insights into the molecular mechanisms of NASH and possible diagnostic biomarkers for early detection.

Effect of serum antioxidants on cognitive dysfunction in first-episode and drug-naïve patients with major depressive disorder

BACKGROUND

Cognitive dysfunction is a persistent and difficult-to-treat symptom of major depressive disorder (MDD) and is receiving increasing attention. A balanced state of oxidative stress sustained by antioxidants is essential for normal functioning of brain, including learning capacity, emotional regulation, and cognitive function. The correlation between cognition and oxidative stress may also be altered in patients with mental disorders. This study aimed to explore the relationship between serum antioxidant levels and cognitive dysfunction in patients with MDD.

METHODS

We collected and matched cognitive performance data using the Measurement and Treatment Research to Improve Cognition in Schizophrenia Consensus Cognitive Battery (MCCB), serum antioxidants, and demographic and clinical characteristics of 105 first-episode drug-naïve patients with MDD and 53 healthy controls (HC) from February 2022 to October 2023, and then analyzed the differences between the two groups. HamiltonDepressionScale-17 and Young Mania Rating Scale (YMRS) were used to evaluate the clinical symptoms of the participants with MDD. Serum antioxidants, including albumin (ALB), uric acid (UA), and superoxide dismutase (SOD) were used to detect the level of oxidative stress in participants and its correlation with cognitive function. We then used a threshold for cognitive dysfunction of 1.5 standard deviations below the mean of the standard score to divide the participants with MDD into two groups to detect the relevant elements of the five different domains of cognitive dysfunction in MDD.

RESULTS

ALB levels were significantly lower in the MDD group (p = 0.001) after adjusting for years of education. The performance in all five domains of cognitive function was significantly worse in the MDD group than in the HC group (p < 0.001). Speed of processing (SOP) in the MDD group correlated with ALB (r = 0.261, p = 0.008), and UA (r = 0.295, p = 0.002) levels. We also explored the correlation between the attention/vigilance (AV) domain and the UA (r = 0.239, p = 0.015). YMRS score was risk factor of impairment of SOP domain in patients with MDD. Yet UA was a protective factor against SOP impairment, with a 0.006-fold reduction in the risk of SOP impairment for each 1-unit increase in UA.

CONCLUSIONS

As serum antioxidants, ALB and UA may serve as biomarkers of cognitive function in patients with MDD. Our findings contribute to the understanding of the potential ability of serum antioxidants to predict cognitive decline in patients with MDD.

Risk factors for falls in older people with pre-frailty: A systematic review and meta-analysis

BACKGROUND

Frailty is considered highly prevalent among the elderly, and falls are a severe adverse event that occurs at a significantly higher rate in frail elderly patients, leading to serious consequences. The pre-frailty stage represents a reversible transitional state between health and frailty, and targeted interventions for pre-frail older adults can effectively reduce the incidence of falls in this population. Existing studies have not definitely identified the risk factors for falls in pre-frail older adults. This paper explores the relevant risk factors for falls in pre-frail older adults.

METHODS

PubMed, Embase, Web of Science, Cochrane Library, CBM, CNKI, Wan fang, and VIP databases were searched for studies published from inception to 2023, without language restrictions. Observational studies were included in this systematic review that analyzed risk factors for accidental falls in pre-frail older adults. The NOS scale was used to evaluate the quality of cohort studies and case-control studies, while the AHRQ scale was used to evaluate the quality of the cross-sectional study. We utilized odds ratios (OR) and their corresponding 95 % confidence intervals (CI) to describe the statistical indicators. OR and 95 % CI values were directly extracted and organized in Excel. In cases where OR and CI values were not directly available, we extracted β and p values, calculated Exp using functions, and subsequently derived OR and 95 % CI using formulas. Finally, data pertaining to each risk factor were incorporated into RevMan 5.4 software for statistical analysis and effect size synthesis. We performed tests for heterogeneity and evaluated publication bias.

RESULTS

A total of 14,370 studies were initially identified, and 26 studies were included in the systematic review. Among these studies, 14 were of high quality, while the remaining 12 were of moderate quality. A total of 16 risk factors were identified as potential risk factors for falls in pre-frail older adults. Significant risk factors were peripheral neuropathy(OR = 3.18, 95 %CI:3.02-3.35), decreased gait speed(OR = 1.90, 95 %CI:1.60-2.27), decreased ability to perform activities of daily living(OR = 1.57, 95 % CI:1.42-1.75), grip strength decreases(OR = 1.53, 95 % CI:1.17-2.00), gender (female)(OR = 1.51, 95 % CI:1.39-1.64), pain(OR = 1.47, 95 %CI:1.41-1.54), history of falls(OR = 1.20, 95 %CI:1.13-1.28) and age(OR = 1.10, 95 %CI:1.07-1.14).

CONCLUSIONS

The occurrence of falls in pre-frail older adults is associated with multiple risk factors. These risk factors can provide clinical nursing staff with specific focal points for monitoring this population and devising targeted fall prevention measures, with the aim of reducing the incidence of falls in pre-frail older adults.

REGISTRATION

The systematic review was registered on the International Prospective Register of Systematic Review (CRD42023450670).

A multiple linear regression model calculates the anterior neck skin surface area in Chinese individuals: Implications for neck resurfacing and reconstruction

BACKGROUND

The normal value of anterior neck skin surface area (ANSSA) before scar contracture is essential for designing a skin flap of appropriate size to reconstruct the neck. However, to our knowledge, no relevant research has been reported. This study aimed to explore the normal value of ANSSA and to establish ANSSA calculation models.

METHODS

A total of 101 healthy volunteers were included in the training group, and 24 healthy volunteers and 24 patients with cervical scar contracture were included in the validation group. Anthropometric neck parameters were obtained using 3D stereophotogrammetry. Independent predictive factors were identified by multiple linear regression analyses, and ANSSA calculation models based on these factors were established.

RESULTS

The ANSSA of adult males and females was 13653.7 ± 1976.4 mm2 and 10142.1 ± 2199.8 mm2 in a neutral position, and 17846.5 ± 2365.7 mm2 and 14264.3 ± 1784.2 mm2 in an extended position, respectively. The ANSSA was significantly correlated with gender, weight, sternomental distance, and lateral neck length (p < 0.05). The adjusted r2 values of the neutral and extended ANSSA calculation models were 0.831 and 0.819 (p < 0.001).

CONCLUSIONS

This study quantified neck morphological features, and established ANSSA calculation models to assist surgeons in designing flap and preventing limited neck mobility caused by insufficient flap size. To our knowledge, this study made it possible for the first time to accurately calculate the wound area and the required flap area preoperatively, eliminating the rough estimation based on experience.

Oxidative alterations in exfoliated oral mucosa cells of patients with major depressive disorder

Objectives

This study aimed to investigate oxidative stress markers in the oral mucosal cells of individuals diagnosed with major depressive disorder (MDD).

Methods

A case-control design was used, including twenty patients diagnosed with MDD, based on the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) criteria, and twenty healthy controls. Oral exfoliated cells were collected from all participants. Intracellular levels of reactive oxygen species (ROS), mitochondrial membrane potential (ΔΨm), caspase-3 and -7 activity, and reduced glutathione (GSH) were measured in Arbitrary Fluorescence Units (AFU).

Results

The MDD group demonstrated significantly elevated intracellular ROS levels (p = 0.0012) and caspase-3 and -7 activity (p = 0.0171) in comparison to the control group. Additionally, a decrease in ΔΨm expression was observed in the oral cells of MDD patients (p = 0.0265), whereas GSH expression levels did not differ significantly between the two groups (p = 0.8908).

Conclusions

The findings indicate heightened oxidative stress in the oral exfoliated cells of individuals with MDD. This study supports the potential use of oral cells as a non-invasive biomarker source for assessing oxidative stress in depressive disorders.

Screening tools for malignancy in patients with cryptogenic stroke: Systematic review

Up to 20% of patients with cryptogenic ischemic stroke have an occult malignancy at the time of stroke presentation, providing an opportunity for early cancer detection. Despite this significant association, there is currently no consensus in international guidelines on how to systematically screen for malignancy in ischemic stroke patients. This review aims to summarize recent evidence on clinical features and scores, and predictive laboratory tests, that can guide malignancy screening in ischemic stroke patients. Our systemic search included PubMed, MEDLINE and Cochrane databases and yielded a total of 12 studies meeting the inclusion criteria for review. Elevated D-dimer levels and multiple infarcts in different cerebral circulations emerged as key markers. Based on the summarized data, we propose a flowchart for clinical decision-making regarding malignancy screening in patients with ischemic stroke. As the initial steps, we recommend using D-dimers cut-offs and stroke pattern on brain imaging to classify patients according to their risk profile. Based on the identified risk, we recommend a subsequent diagnostic workup addressing the most prevalent cancer types, including gastrointestinal tract, lung adenocarcinoma and gender-related cancer. The clinical implications of early malignancy screening and the need for evidence-based guidelines in cryptogenic stroke are discussed.

Noncoding variants and sulcal patterns in congenital heart disease: Machine learning to predict functional impact

Neurodevelopmental impairments associated with congenital heart disease (CHD) may arise from perturbations in brain developmental pathways, including the formation of sulcal patterns. While genetic factors contribute to sulcal features, the association of noncoding de novo variants (ncDNVs) with sulcal patterns in people with CHD remains poorly understood. Leveraging deep learning models, we examined the predicted impact of ncDNVs on gene regulatory signals. Predicted impact was compared between participants with CHD and a jointly called cohort without CHD. We then assessed the relationship of the predicted impact of ncDNVs with their sulcal folding patterns. ncDNVs predicted to increase H3K9me2 modification were associated with larger disruptions in right parietal sulcal patterns in the CHD cohort. Genes predicted to be regulated by these ncDNVs were enriched for functions related to neuronal development. This highlights the potential of deep learning models to generate hypotheses about the role of noncoding variants in brain development.

Local glycolysis-modulating hydrogel microspheres for a combined anti-tumor and anti-metastasis strategy through metabolic trapping strategy

Anti-glycolysis is well-recognized for inhibition of tumor proliferation. However, tumor metabolic heterogeneity confers great challenges in the therapeutic efficacy of glycolysis inhibitors. Here, a metabolic trapping strategy was employed to avoid metabolism heterogeneity in tumors. Unlike usual glycolysis inhibition, the glycolysis level was first promoted. Then excessive metabolite of lactate was transformed into H2O2 and hydroxyl radical by lactate oxidase (LOX) and MIL-101 (Fe) nanoparticles (MF). Finally, the ATP production was inhibited, and the tumor was suppressed by the generation of toxic reactive oxygen species (ROS). We realized this strategy via methacrylated gelatin (GelMA) hydrogel microspheres, co-loaded with metformin (MET) and LOX@MF. The results showed that MET was completely released within 2 h, followed by most LOX@MF released within 72 h. LOX@MF and MET synergistically suppressed tumor proliferation and angiogenesis both in vitro and in vivo. Compared with control, the primary tumor volume was reduced by 75.7 %, and the average number of lung metastasis nodules decreased from 15.5 to 1.0. Regarding the metabolism, higher glycolytic enzymes expressions were observed initially, followed by lower lactate and vascular endothelial growth factor (VEGF), and finally elevated ROS levels. Overall, our study provides new insights to improve metabolism heterogeneity-limited metabolic cancer therapy.

C-reactive protein expression in acute ischemic stroke blood clots: Implications for etiology

INTRODUCTION

C-reactive protein (CRP) is a prototypic inflammation marker, with elevated levels associated with an increased risk of cerebrovascular events. To determine whether CRP could be a useful biomarker of stroke etiology, we investigated CRP expression in acute ischemic stroke (AIS) clots from large-artery atherosclerosis (LAA), cardio-embolism (CE) and cryptogenic (Crypt) subtypes.

PATIENTS AND METHODS

We analysed clot samples from AIS patients (LAA, CE, Crypt; n = 50 each), collected across five stroke centres in France, Serbia, Spain, and Japan between February 2021 and February 2024, as part of the prospective Clotbase International Registry of 460 patients who underwent mechanical thrombectomy. Clot components were assessed using Martius Scarlet Blue staining. CRP expression was examined using immunohistochemistry and its co-localisation with clot components was detected using immunofluorescence. Clinical parameters were compared across etiologies.

RESULTS

CRP expression varied significantly among clots. Most clots (65%) had minimal (⩽1%) CRP and 35% showed substantial (>1%) CRP. CE group had significantly more clots with substantial CRP than LAA and Crypt (48% vs 30% and 26%; p = 0.048). Clots with substantial CRP contained more fibrin (28.9%) than those with low CRP (20.6%; p = 0.005). Confocal microscopy showed CRP co-localised with fibrin and white blood cells (WBCs).

DISCUSSION AND CONCLUSION

Significantly more AIS clots of CE expressed substantial CRP compared to those of LAA and Crypt, suggesting CE strokes may be more strongly linked to inflammation. Clots with substantial CRP expression displayed significantly more fibrin compared to those with minimal CRP expression, suggesting a potential association between inflammation and fibrin-rich clots. Further study of the relationship between CRP, fibrin and WBCs in clots may improve our understanding of the processes of thrombo-inflammation.

Quantification of Glutathione and Its Associated Spontaneous Neuronal Activity in Major Depressive Disorder and Obsessive-Compulsive Disorder

BACKGROUND

Glutathione (GSH) is a crucial antioxidant in the human brain. Although proton magnetic resonance spectroscopy using the Mescher-Garwood point-resolved spectroscopy sequence is highly recommended, limited literature has measured cortical GSH using this method in major psychiatric disorders.

METHODS

By combining magnetic resonance spectroscopy and resting-state functional magnetic resonance imaging, we quantified brain GSH and glutamate in the medial prefrontal cortex and precuneus and explored relationships between GSH levels and intrinsic neuronal activity as well as clinical symptoms among healthy control (HC) participants (n = 30), people with major depressive disorder (MDD) (n = 28), and people with obsessive-compulsive disorder (OCD) (n = 28).

RESULTS

GSH concentrations were lower in the medial prefrontal cortex and precuneus in both the MDD and OCD groups than in the HC group. In the HC group, positive correlations were noted between GSH and glutamate levels and between GSH and fractional amplitude of low-frequency fluctuations in both regions. However, while these correlations were absent in both patient groups, there was a weak positive correlation between glutamate and fractional amplitude of low-frequency fluctuations. Moreover, GSH levels were negatively correlated with depressive and compulsive symptoms in MDD and OCD, respectively.

CONCLUSIONS

These findings suggest that reduced GSH levels and an imbalance between GSH and glutamate could increase oxidative stress and alter neurotransmitter signaling, thereby leading to disruptions in GSH-related neurochemical-neuronal coupling and psychopathologies across MDD and OCD. Understanding these mechanisms could provide valuable insights into the processes that underlie these disorders and potentially become a springboard for future directions and advancing our knowledge of their neurobiological foundations.

Programmed cell death in nasopharyngeal carcinoma: Mechanisms and therapeutic targets

Programmed cell death is a type of autonomic and orderly cell death mode controlled by genes that maintain homeostasis and growth. Tumor is a typical manifestation of an imbalance in environmental homeostasis in the human body. Currently, several tumor treatments are designed to trigger the death of tumor cells. Nasopharyngeal carcinoma is one of the most common malignant tumors in China. It displays obvious regional and ethnic differences in its incidence, being typically high in the south and low in the north of China. Nasopharyngeal carcinoma is currently considered to be a polygenic inherited disease and is often mediated by the interaction between multiple genes or between genes and the environment. Apoptosis has long been considered the key to tumor treatment, while other cell death pathways have often been overlooked. The current study provides an overview of the relationship among apoptosis, autophagy, pyroptosis, necroptosis, ferroptosis, and nasopharyngeal carcinoma, and the regulatory pathways of nasopharyngeal carcinoma based on five cell death modes were synthesized from the view of molecule. We hope this review will help explore additional, novel programmed cell death targets for the treatment of nasopharyngeal carcinoma and thus promote in-depth research.

The complex interplay between redox dysregulation and mTOR signaling pathway in cancer: A rationale for cancer treatment

The mechanistic target of rapamycin (mTOR) is a highly conserved serine/threonine kinase that plays a critical role in regulating cellular processes such as growth, proliferation, and metabolism in healthy cells. Dysregulation of mTOR signaling and oxidative stress have been implicated in various diseases including cancer. This review aims to provide an overview of the current understanding of mTOR and its involvement in cell survival and the regulation of cancer cell metabolism as well as its complex interplay with reactive oxygen species (ROS). On the one hand, ROS can inhibit or activate mTOR pathway in cancer cells through various mechanisms. Conversely, mTOR signaling can induce oxidative stress in tumor cells notably due to the inhibition in the expression of antioxidant enzyme genes. Since mTOR is often activated and plays crucial role in cancer cell survival, the use of mTOR inhibitors, which often induce ROS accumulation, could be an interesting approach for cancer treatment. This review will address the advantages, disadvantages, combination strategies, and limitations associated with therapeutic modulation of mTOR signaling pathway in cancer treatment.

Glucose metabolism impairment in major depressive disorder

Major depressive disorder (MDD) is a common mental disorder with chronic tendencies that seriously affect regular work, life, and study. However, its exact pathogenesis remains unclear. Patients with MDD experience systemic and localized impairments in glucose metabolism throughout the disease course, disrupting various processes such as glucose uptake, glycoprotein transport, glycolysis, the tricarboxylic acid cycle (TCA), and oxidative phosphorylation (OXPHOS). These impairments may result from mechanisms including insulin resistance, hyperglycemia-induced damage, oxidative stress, astrocyte abnormalities, and mitochondrial dysfunction, leading to insufficient energy supply, altered synaptic plasticity, neuronal cell death, and functional and structural damage to reward networks. These mechanical changes contribute to the pathogenesis of MDD and severely interfere with the prognosis. Herein, we summarized the impairment of glucose metabolism and its pathophysiological mechanisms in patients with MDD. In addition, we briefly discussed potential pharmacological interventions for glucose metabolism to alleviate MDD, including glucagon-like peptide-1 receptor agonists, metformin, topical insulin, liraglutide, and pioglitazone, to encourage the development of new therapeutics.

Air pollution, temperature and mumps: A time-series study of independent and interaction effects

Understanding the associations of air pollutants and temperature with the incidence of mumps, and exploring the interaction effects of heat index (HI) and air pollutants, are crucial for disease intervention under the context of climate change. This time-series study was conducted in Jining city using data on daily mumps cases, meteorological factors and air pollutants obtained from 2015 to 2021. Distributed lag models combined with quasi-Poisson regressions were applied to examine these associations. The findings indicated a heightened risk of mumps in correlation with elevated exposure to PM2.5, PM10, and NO2. Specifically, the precent changes in the risk of mumps were 0.6 % and 0.3 % associated with per 10 μg/m3 increment in PM2.5 and PM10 at lag0 day, respectively. The cumulative effects of temperature were significantly associated with mumps, showing a "U"-shape pattern. Compared to the minimum effect value of 4 ℃, relative risk (RRs) of mumps for high and low temperature (at the 90th and 10th percentiles) were 1.961 (1.106-3.477) and 1.058 (0.976-1.158), respectively. There were significant synergistic effects between particulate matters (PMs) and HI. Compared to the low concentrations of PMs and normal heat index (NHI), co-exposure to high PMs and high heat index (HHI) has the highest risk (RRPM2.5: 1.32 and, RRPM10: 1.30). Individuals aged over 5 years was susceptible to particulate matters (PMs). Our results suggested that mitigating both PM and high temperature exposure may bring more health benefits for mumps incidence.

Diet interventions for depression: Review and recommendations for practice

OBJECTIVE

this paper aims to present the evidence for the role of diet in the prevention and treatment of depression, review the potential underlying mechanisms and provide practice recommendations for mental health clinicians.

METHODS

A literature review was conducted through searches of PubMed with the search terms 'depression', 'diet', 'prevention', 'treatment' and 'mechanisms' and combinations thereof. Additional articles were identified through hand searching.

RESULTS

Greater adherence to several healthy dietary patterns, traditional diets such as the Mediterranean diet and other diets such as the DASH diet are associated with or can treat symptoms of depression. Several limitations of the research were noted, many of which relate to inherent challenges of studying diet. Mechanisms by which dietary intervention can influence mood include the gut microbiome, modulation of inflammatory processes, reduction in oxidative stress and modulation of hypothalamic-pituitary-adrenal axis function. Recommendations for mental health clinicians to enable translation of the evidence into practice are provided.

CONCLUSION

Diet can play an important role in preventing and treating depression. Mental health clinicians are well placed to provide dietary counselling and to use clinical judgement in choosing the specific approach that reflects the needs of the patient but are encouraged to refer to a specialist dietitian where necessary.

Microglial activation and hypothalamic structural plasticity in HFD obesity: insights from semaglutide and minocycline

High-fat diet (HFD)-induced microglial activation contributes to hypothalamic inflammation and obesity, but the mechanisms linking microglia to structural changes remain unclear. This study explored the role of microglia in impairing hypothalamic synaptic plasticity in diet-induced obesity mice and evaluated the therapeutic potential of semaglutide (Sema) and minocycline (MI). Six-week-old C57BL/6J mice were divided into low-fat diet and HFD groups. At week 30, the HFD-fed mice were treated daily with Sema or MI for six weeks. Confocal microscopy assessed hypothalamic dendritic spines, synaptic organization, and microglia-synapse interactions. We also analyzed microglial morphology, CD68/CD11b colocalization with Iba-1, synaptic marker expression, and phagocytosis-related pathways (C1q, C3, CD11b). BV2 microglia were used to examine the direct effects of Sema or MI on microglia and validate the in vivo findings. HFD feeding induced microglial activation, as indicated by increased colocalization of CD68 or synaptophysin and CD11b with Iba-1, along with elevated C1q, C3, and CD11b expression, signaling enhanced synaptic phagocytosis. This was accompanied by reduced hypothalamic dendritic spines, decreased synaptic marker expression, and disrupted excitatory/inhibitory synaptic organization in the melanocortin system, as well as impaired glucose metabolism, disrupted leptin-ghrelin balance, and increased food intake and body weight. Sema and MI treatments reversed the pathological changes of microglial activation and restored hypothalamic synaptic structure, although their effects on synaptic organization and metabolic outcomes differed. Our findings highlight the key role of microglial activation in hypothalamic synaptic impairment in diet-induced obesity models, with Sema and MI possibly offering distinct therapeutic pathways to mitigate these impairments.

Treatment of acute pharyngitis in rats with season tea decoctions from traditional Chinese medicine through a synergistic and subtle regulation of ARNTL and BHLHE40

ETHNOPHARMACOLOGICAL RELEVANCE

While the seasonal variations in the human immune function and many infectious diseases are well-known, to develop therapeutic strategies regarding such seasonality is quite challenging. However, some traditional medical practices have already taken the seasonality into account, such as the "Season Tea" (ST) decoctions investigated in the present study.

AIM OF THE STUDY

We present a study of the ST decoctions from traditional Chinese medicine, which include four formulae designed for the four seasons, aiming to investigate their pharmacological commonality and distinction.

MATERIALS AND METHODS

A rat model of acute pharyngitis was utilized for the pharmacological study, and the effects of the ST decoctions were evaluated through histology, biomedical assays, microarray analysis, real-time quantitative PCR and Western blot.

RESULTS

The experimental data show that all of the four ST formulae display good pharmaceutical effects on acute pharyngitis, and circadian rhythm appears to be a significant pathway for investigating their pharmacological commonality and distinction. Specifically, while all of the four ST decoctions can regulate the circadian-rhythm-related genes ARNTL and BHLHE40, the regulation is along different directions with the modification of the supplements and the substrates in each ST formula.

CONCLUSION

These results indicate the correlation between the acute pharyngitis and circadian rhythm, and illustrate the possibility of synergistically and subtly regulating ARNTL and BHLHE40, which is significant for relevant drug development.

The latest research progress: Active components of Traditional Chinese medicine as promising candidates for ovarian cancer therapy

ETHNOPHARMACOLOGICAL RELEVANCE

Ovarian cancer ranks the first in the mortality of gynecological tumors. Because there are no obvious symptoms in the early stage of ovarian cancer, most patients are in the advanced stage of the disease at the time of diagnosis. The incidence of ovarian cancer is increasing year by year, and the incidence of ovarian cancer has a trend of younger age. In recent years. Traditional Chinese medicine (TCM) has a significant impact on improving the quality of life of cancer patients, reducing drug toxicity, preventing metastasis and recurrence, enhancing the efficacy of radiotherapy and chemotherapy, and prolonging survival time, so patients have benefited a lot.

AIM OF THE STUDY

This review summarizes the mechanisms and molecular pathways through which active ingredients of TCM act in ovarian cancer. It explores the advantages of TCM in treating ovarian cancer. This review provides theoretical support for the use of TCM in the treatment of ovarian cancer, offering new perspectives for its clinical prevention and treatment.

MATERIALS AND METHODS

This review conducted a literature search on PubMed, Web of Science, Wanfang Database, and China National Knowledge Infrastructure (CNKI) for relevant studies on TCM active ingredients in preventing ovarian cancer. The search terms included "ovarian cancer" combined with "Chinese herbal medicine," "Herbal medicine," "Traditional Chinese medicine," and "Active ingredients of Chinese medicine". Based on existing experimental and clinical research, the paper systematically summarized and analyzed the mechanisms of TCM in treating ovarian cancer.

RESULTS

Active ingredients of TCM inhibit the occurrence and development of ovarian cancer through inducing tumor cell apoptosis, inhibiting tumor cell proliferation, suppressing tumor cell migration and invasion, inducing tumor cell autophagy, promoting epithelial-mesenchymal transition, and enhancing the efficacy of radiotherapy and chemotherapy drugs. Chinese medicine provides a comprehensive treatment option for ovarian cancer patients, synergizing with radiotherapy and chemotherapy drugs to enhance treatment effectiveness and introduce new hope and possibilities in clinical therapy.

CONCLUSIONS

Active ingredients of TCM can inhibit the occurrence and development of ovarian cancer, but further clinical research is needed to support their application.

Risk factors for inflammatory bowel disease: an umbrella review

Introduction

Inflammatory bowel disease (IBD) represents a cluster of chronic idiopathic inflammatory disorders situated at the nexus of intricate interplays. The primary aim of the present investigation is to perform an umbrella review of metaanalyses, systematically offering a comprehensive overview of the evidence concerning risk factors for IBD.

Methods

To achieve this, we searched reputable databases, including PubMed, Embase, Web of Science, and the Cochrane Database of Systematic Reviews, from inception through April 2023. Two authors independently assessed the methodological quality of each metaanalysis using the AMSTAR tool and adhered to evidence classification criteria.

Results

In total, we extracted 191 unique risk factors in meta-analyses, including 92 significantly associated risk factors. The top ten risk factors were human cytomegalovirus (HCMV) infection, IBD family history, periodontal disease, poliomyelitis, campylobacter species infection, hidradenitis suppurativa, psoriasis, use of proton pump inhibitors, chronic obstructive pulmonary disease, and western dietary pattern.

Discussion

In conclusion, this umbrella review extracted 62 risk factors and 30 protective factors, most of which were related to underlying diseases, personal lifestyle and environmental factors. The findings in this paper help to develop better prevention and treatment measures to reduce the incidence of IBD, delay its progression, and reduce the burden of IBD-related disease worldwide.

Systematic review registration

https://www.crd.york.ac.uk/PROSPERO/, identifier CRD42023417175.

Relationships between emotional states, bipolar disorder, and gastrointestinal disorders: A two-sample Mendelian randomization study

BACKGROUND

Functional gastrointestinal symptoms are frequently observed in patients with bipolar affective disorder, but the causal relationship between these conditions remains unclear. To establish causality, this study utilized Mendelian randomization (MR) with data from large-scale genomic research. The investigation aimed to elucidate the relationship between emotional states, bipolar disorder, and functional gastrointestinal disorders (FGIDs).

METHODS

Summary statistics from GWAS were utilized for mood swings (UK biobank, N = 451,619), irritable mood (UK biobank, N = 373,733), bipolar disorder (UK biobank, N = 352,006),functional dyspepsia (FinnGen biobank, N = 194,071), and irritable bowel syndrome (UK biobank, N = 486,601). All GWAS summary statistics were derived from individuals of European ancestry. The primary analysis employed the inverse variance-weighted method for Mendelian randomization (MR). Additionally, we conducted tests for heterogeneity and pleiotropy to ensure the robustness of our results.

RESULTS

A suggestive positive causal relationship was identified between mood swings-related conditions and IBS using the inverse variance-weighted (IVW) method [mood swings-IBS: OR/95%CI: 3.221(2.417,4.294), P(1.42E-15); irritable mood-IBS: OR/95%CI: 1.881(1.615,2.191), P(4.56E-16); bipolar disorder-IBS: OR/95%CI: 1.003(1.001,1.006), P(0.009)]. For functional dyspepsia, a suggestive positive causal relationship was observed with mood swings [mood swings-FD: OR/95%CI: 2.827(1.124,7.109), P(0.027)]. In the reverse analysis, causal relationship was observed between IBS and emotional states [IBS and mood swings: OR/95%CI: 1.030(1.021,1.040), P(1.10E-10); IBS and irritable mood: OR/95%CI: 1.064(1.041,1.087), P(2.58E-08)].

CONCLUSIONS

Mood swings, irritable mood, and bipolar disorder were associated with an increased risk of functional gastrointestinal disorders (FGIDs). Additionally, reverse analysis revealed a causal relationship between irritable bowel syndrome (IBS) and both mood swings and irritable mood. These findings suggest that targeted emotional interventions may be beneficial for patients with FGIDs. Further research is warranted to explore the relationship between mood instability-related disorders and FGIDs, particularly IBS.

Gelsemium low doses protect against serum deprivation-induced stress on mitochondria in neuronal cells

ETHNOPHARMACOLOGICAL RELEVANCE

Gelsemium dynamized dilutions (GDD) are known as a remedy for a wide range of behavioral and psychological symptoms of depression and anxiety at ultra-low doses, yet the underlying mechanisms of the mode of action of G. sempervirens itself are not well understood.

AIM OF THE STUDY

The present study was designed to examine the neuroprotective effects of Gelsemium preparations in counteracting stress-related mitochondrial dysfunctions in neuronal cells.

MATERIALS AND METHODS

We started by studying how serum deprivation affects the mitochondrial functions of human neuroblastoma (SH-SY5Y) cells. Next, we looked into the potential of various Gelsemium dilutions to improve cell survival and ATP levels. After identifying the most effective dilutions, 3C and 5C, we tested their ability to protect SH-SY5Y cells from stress-induced mitochondrial deficits. We measured total and mitochondrial superoxide anion radicals using fluorescent dyes dihydroethidium (DHE) and the red mitochondrial superoxide indicator (MitoSOX). Additionally, we assessed total nitric oxide levels with 4,5-diaminofluorescein diacetate (DAF-2DA), examined the redox state using pRA305 cells stably transfected with a plasmid encoding a redox-sensitive green fluorescent protein, and analyzed mitochondrial network morphology using an automated high-content analysis device, Cytation3. Furthermore, we investigated bioenergetics by measuring ATP production with a bioluminescence assay (ViaLighTM HT) and evaluated mitochondrial respiration (OCR) and glycolysis (ECAR) using the Seahorse Bioscience XF24 Analyzer. Finally, we determined cell survival using an MTT reduction assay.

RESULTS

Our research indicates that Gelsemium dilutions (3C and 5C) exhibited neuroprotective effects by: - Normalizing total and mitochondrial superoxide anion radicals and total nitric oxide levels. - Regulating the mitochondrial redox environment and mitochondrial networks morphology. - Increasing ATP generation as well as OCR and ECAR levels, thereby reducing the viability loss induced by serum withdrawal stress.

CONCLUSIONS

These findings highlight that dynamized Gelsemium preparations may have neuroprotective effects against stress-induced cellular changes in the brain by regulating mitochondrial functions, essential for the survival, plasticity, and function of neurons in depression.

Organic carbon dry deposition outpaces atmospheric processing with unaccounted implications for air quality and freshwater ecosystems

Dry deposition is an important yet poorly constrained process that removes reactive organic carbon from the atmosphere, making it unavailable for airborne chemical reactions and transferring it to other environmental systems. Using an aircraft-based measurement method, we provide large-scale estimates of total gas-phase organic carbon deposition rates and fluxes. Observed deposition rates downwind of large-scale unconventional oil operations reached up to 100 tC hour-1, with fluxes exceeding 0.1 gC m-2 hour-1. The observed deposition lifetimes (τdep) were short enough (i.e., 4 ± 2 hours) to compete with chemical oxidation processes and affect the fate of atmospheric reactive carbon. Yet, much of this deposited organic carbon cannot be accounted for using traditional gas-phase deposition algorithms used in regional air quality models, signifying underrepresented, but influential, chemical-physical surface properties and processes. Furthermore, these fluxes represent a major unaccounted contribution of reactive carbon to downwind freshwater ecosystems that outweigh terrestrial sources, necessitating the inclusion of dry deposition in aquatic carbon balances and models.

Allogenic Vertebral Body Adherent Mesenchymal Stromal Cells Promote Muscle Recovery in Diabetic Mouse Model of Limb Ischemia

BACKGROUND

Chronic limb-threatening ischemia (CLTI) carries a significant risk for amputation, especially in diabetic patients with poor options for revascularization. Phase I trials have demonstrated efficacy of allogeneic mesenchymal stromal cells (MSC) in treating diabetic CLTI. Vertebral bone-adherent mesenchymal stromal cells (vBA-MSC) are derived from vertebral bodies of deceased organ donors, which offer the distinct advantage of providing a 1,000x greater yield compared to that of living donor bone aspiration. This study describes the effects of intramuscular injection of allogenic vBA-MSC in promoting limb perfusion and muscle recovery in a diabetic CLTI mouse model.

METHODS

A CLTI mouse model was created through unilateral ligation of the femoral artery in male polygenic diabetic TALLYHO mice. The treated mice were injected with vBA-MSC into the gracilis muscle of the ischemic limb 7 days post ligation. Gastrocnemius or tibialis muscle was assessed postmortem for fibrosis by collagen staining, capillary density via immunohistochemistry, and mRNA by quantitative real-time polymerase chain reaction (PCR). Laser Doppler perfusion imaging and plantar flexion muscle testing (MT) were performed to quantify changes in limb perfusion and muscle function.

RESULTS

Compared to vehicle (Veh) control, treated mice demonstrated indicators of muscle recovery, including decreased fibrosis, increased perfusion, muscle torque, and angiogenesis. PCR analysis of muscle obtained 7 and 30 days post vBA-MSC injection showed an upregulation in the expression of MyoD1 (P = 0.03) and MyH3 (P = 0.008) mRNA, representing muscle regeneration, vascular endothelial growth factor A (VEGF-A) (P = 0.002; P = 0.004) signifying angiogenesis as well as interleukin (IL-10) (P < 0.001), T regulatory cell marker Foxp3 (P = 0.04), and M2-biased macrophage marker Mrc1 (CD206) (P = 0.02).

CONCLUSIONS

These findings indicate human allogeneic vBA-MSC ameliorate ischemic muscle damage and rescue muscle function. These results in a murine model will enable further studies to develop potential therapies for diabetic CLTI patients.

Investigation of the circulatory microRNAs and their involvement in regulation of inflammation in patients with COVID-19

BACKGROUND

Dysregulated levels of cytokines may lead to cytokine storm, which has been implicated in the immunopathogenesis of coronavirus disease 2019 (COVID-19). Here in the current study, the role of microRNA (miR)-155-5p, miR-146a, and miR-221-3p in the regulation of the immune responses and inflammatory state in patients with COVID-19 was investigated.

METHODS

In this case-control study, peripheral blood samples were obtained from 75 COVID-19 subjects and 100 healthy controls. From the plasma samples, RNA was extracted and cDNA was synthesized, and subsequently the transcript level of miRNAs was measured by Real-time PCR. The plasma levels of interleukin (IL)-4 and interferon (IFN)-γ were determined using ELISA.

RESULTS

miR-155-5p (fold change = 1.87, P = 0.020) and miR-221-3p (fold change = 2.26, P = 0.008), but not miR-146a, was upregulated in the plasma sample of COVID-19 cases compared to controls. The level of IFN-γ (but not IL-4) was significantly higher in the plasma samples of COVID-19 patients compared to control group. The expression level of miR-155-5p (r = 0.35, corrected P = 0.066) and miR-221-3p (r = 0.25, corrected P = 0.066) had positive correlation with the plasma levels of IFN-γ.

CONCLUSIONS

IFN-γ pathway in involved in the pathogenesis of COVID-19 that is regulated through miR-155-5p and miR-221-3p. These miRNAs showed potential utility as biomarkers for predicting the severity of COVID-19.