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1.
Eur J Med Chem ; 276: 116602, 2024 Jun 22.
Article de Anglais | MEDLINE | ID: mdl-38971049

RÉSUMÉ

Zuranolone (SAGE-217) is a neuroactive steroid (γ-aminobutyric acid)A (GABAA) receptor positive allosteric modulator (PAM) as the first oral drug approved by the FDA in 2023, which is used to treat patients with postpartum depression (PPD). SAGE-217 has a "black box" warning with impairing ability to drive or engage in other potentially hazardous activities. In addition, SAGE-217 can cause CNS depressant effects such as somnolence and confusion, suicidal thoughts and behavior and embryo-fetal toxicity. Based on the structure-activity relationship (SAR) of SAGE-217, a total of 28 neuroactive steroids with novel pharmacophore at C-21 modulated SAGE-217 derivatives were designed and synthesized. The biological activities were evaluated by both synaptic α1ß2γ2 GABAA receptor and extrasynaptic α4ß3δ GABAA receptor cell assays. The optimal compound S28 exhibited much more potent potency and similar efficacy at extrasynaptic GABAA receptor than SAGE-217. Different from above, compound S28 exhibited similar potency and lower efficacy at synaptic GABAA receptor than SAGE-217, which were consistent with the analysis of molecular docking and dynamics simulation results. The appropriate lower efficacy at synaptic GABAA receptor of compound S28 might contribute to reduce the side effects of excessive sedation. Furthermore, compound S28 was demonstrated to have excellent in vivo pharmacokinetic (PK) parameters, robust in vivo pharmacodynamic (PD) effects and good safety profiles. Therefore, compound S28 represents a potentially promising treatment of PPD candidate that warrants further investigation.

2.
Life Sci ; 352: 122891, 2024 Jul 06.
Article de Anglais | MEDLINE | ID: mdl-38977060

RÉSUMÉ

There is a growing body of evidence suggesting that the composition of intestinal flora plays a significant role in regulating lipid metabolism. 2', 3', 5'-tri-O-acetyl-N6-(3-hydroxyphenyl) adenosine (IMMH007) is a new candidate compound for regulating blood cholesterol and other lipids. In this study, we conducted metagenomic and metabolomic analyses on samples from high-fat diet-fed (HFD) hamsters treated with IMMH007. Our findings revealed that IMM-H007 reversed the imbalance of gut microbiota caused by a high-fat diet. Additionally, it activated adiponectin receptor and pantothenate and CoA biosynthesis pathway-related genes, which are known to regulate lipid and glucose metabolism. Furthermore, IMM-H007 promotes cholesterol metabolism by reducing the abundance of genes and species associated with 7α-dehydroxylation and bile salt hydrolase (BSH). Metabolomics and pharmacological studies have shown that IMM-H007 effectively improved glucose and lipid metabolism disorders caused by HFD, reduced the aggregation of secondary bile acids (SBAs), significantly increased the content of hyodeoxycholic acid (HDCA), and also activated the expression of VDR in the small intestine. As a result, there was a reduction in the leakage of diamine oxidase (DAO) into the bloodstream in hamsters, accompanied by an upregulation of ZO-1 expression in the small intestine. The results suggested that IMM-H007 regulated glucose and lipid metabolism, promoted cholesterol metabolism through activating the expression of VDR, inhibiting inflammatory and improving the permeability of the intestinal barrier. Thus, our study provides new understanding of how IMM-H007 interacts with intestinal function, microbiota, and relevant targets, shedding light on its mechanism of action.

3.
Photochem Photobiol Sci ; 23(7): 1393-1415, 2024 Jul.
Article de Anglais | MEDLINE | ID: mdl-38850494

RÉSUMÉ

Photocatalytic technology is widely regarded as an important way to utilize solar energy and achieve carbon neutrality, which has attracted considerable attentions in various fields over the past decades. Metal halide perovskites (MHPs) are recognized as "superstar" materials due to their exceptional photoelectric properties, readily accessible and tunable structure, which made them intensively studied in solar cells, light-emitting diodes, and solar energy conversion fields. Since 2018, increased attention has been focused on applying the MHPs as a heterogeneous visible light photocatalyst in catalyzing organic synthesis reactions. In this review, we present an overview of photocatalytic technology and principles of heterogeneous photocatalysis before delving into the structural characteristics, stability, and classifications of MHPs. We then focus on recent developments of MHPs in photocatalyzing various organic synthesis reactions, such as oxidation, cyclization, C-C coupling etc., based on their classifications and reported reaction types. Finally, we discuss the main limitations and prospects regarding the application of metal halide perovskites in organic synthesis.

4.
CNS Neurosci Ther ; 30(5): e14749, 2024 05.
Article de Anglais | MEDLINE | ID: mdl-38739004

RÉSUMÉ

AIMS: A bone-invasive pituitary adenoma exhibits aggressive behavior, leading to a worse prognosis. We have found that TNF-α promotes bone invasion by facilitating the differentiation of osteoclasts, however, before bone-invasive pituitary adenoma invades bone tissue, it needs to penetrate the dura mater, and this mechanism is not yet clear. METHODS: We performed transcriptome microarrays on specimens of bone-invasive pituitary adenomas (BIPAs) and noninvasive pituitary adenomas (NIPAs) and conducted differential expressed gene analysis and enrichment analysis. We altered the expression of TNF-α through plasmids, then validated the effects of TNF-α on GH3 cells and verified the efficacy of the TNF-α inhibitor SPD304. Finally, the effects of TNF-α were validated in in vivo experiments. RESULTS: Pathway act work showed that the MAPK pathway was significantly implicated in the pathway network. The expression of TNF-α, MMP9, and p-p38 is higher in BIPAs than in NIPAs. Overexpression of TNF-α elevated the expression of MAPK pathway proteins and MMP9 in GH3 cells, as well as promoted proliferation, migration, and invasion of GH3 cells. Flow cytometry indicated that TNF-α overexpression increased the G2 phase ratio in GH3 cells and inhibited apoptosis. The expression of MMP9 was reduced after blocking the P38 MAPK pathway; overexpression of MMP9 promoted invasion of GH3 cells. In vivo experiments confirm that the TNF-α overexpression group has larger tumor volumes. SPD304 was able to suppress the effects caused by TNF-α overexpression. CONCLUSION: Bone-invasive pituitary adenoma secretes higher levels of TNF-α, which then acts on itself in an autocrine manner, activating the MAPK pathway and promoting the expression of MMP9, thereby accelerating the membrane invasion process. SPD304 significantly inhibits the effect of TNF-α and may be applied in the clinical treatment of bone-invasive pituitary adenoma.


Sujet(s)
Adénomes , Système de signalisation des MAP kinases , Matrix metalloproteinase 9 , Invasion tumorale , Tumeurs de l'hypophyse , Facteur de nécrose tumorale alpha , Facteur de nécrose tumorale alpha/métabolisme , Tumeurs de l'hypophyse/métabolisme , Tumeurs de l'hypophyse/anatomopathologie , Humains , Adénomes/anatomopathologie , Adénomes/métabolisme , Animaux , Matrix metalloproteinase 9/métabolisme , Système de signalisation des MAP kinases/physiologie , Système de signalisation des MAP kinases/effets des médicaments et des substances chimiques , Mâle , Lignée cellulaire tumorale , Femelle , Souris , Souris nude , Communication autocrine/physiologie , Communication autocrine/effets des médicaments et des substances chimiques , Adulte d'âge moyen , Tumeurs osseuses/métabolisme , Tumeurs osseuses/anatomopathologie , Adulte , Rats , Mouvement cellulaire/effets des médicaments et des substances chimiques , Mouvement cellulaire/physiologie , Transduction du signal/physiologie , Transduction du signal/effets des médicaments et des substances chimiques
5.
J Med Chem ; 67(10): 7870-7890, 2024 May 23.
Article de Anglais | MEDLINE | ID: mdl-38739840

RÉSUMÉ

Activation of AMP-activated protein kinase (AMPK) is proposed to alleviate hyperlipidemia. With cordycepin and N6-(2-hydroxyethyl) adenosine (HEA) as lead compounds, a series of adenosine-based derivatives were designed, synthesized, and evaluated on activation of AMPK. Finally, compound V1 was identified as a potent AMPK activator with the lipid-lowering effect. Molecular docking and circular dichroism indicated that V1 exerted its activity by binding to the γ subunit of AMPK. V1 markedly decreased the serum low-density lipoprotein cholesterol levels in C57BL/6 mice, golden hamsters, and rhesus monkeys. V1 was selected as the clinical compound and concluded Phase 1 clinical trials. A single dose of V1 (2000 mg) increased AMPK activation in human erythrocytes after 5 and 12 h of treatment. RNA sequencing data suggested that V1 downregulated expression of genes involved in regulation of apoptotic process, lipid metabolism, endoplasmic reticulum stress, and inflammatory response in liver by activating AMPK.


Sujet(s)
AMP-Activated Protein Kinases , Hyperlipidémies , Souris de lignée C57BL , Animaux , AMP-Activated Protein Kinases/métabolisme , Hyperlipidémies/traitement médicamenteux , Hyperlipidémies/métabolisme , Humains , Souris , Mâle , Macaca mulatta , Simulation de docking moléculaire , Administration par voie orale , Mesocricetus , Hypolipémiants/pharmacologie , Hypolipémiants/composition chimique , Hypolipémiants/synthèse chimique , Hypolipémiants/usage thérapeutique , Découverte de médicament , Relation structure-activité , Cricetinae
6.
Clin Transl Med ; 14(5): e1682, 2024 May.
Article de Anglais | MEDLINE | ID: mdl-38769659

RÉSUMÉ

BACKGROUND: The three-dimensional (3D) genome architecture plays a critical role inregulating gene expression. However, the specific alterations in thisarchitecture within somatotroph tumors and their implications for gene expression remain largely unexplored. METHODS: We employed Hi-C and RNA-seq analyses to compare the 3D genomic structures of somatotroph tumors with normal pituitary tissue. This comprehensive approachenabled the characterization of A/B compartments, topologically associateddomains (TADs), and chromatin loops, integrating these with gene expression patterns. RESULTS: We observed a decrease in both the frequency of chromosomal interactions andthe size of TADs in tumor tissue compared to normal tissue. Conversely, the number of TADs and chromatin loops was found to be increased in tumors. Integrated analysis of Hi-C and RNA-seq data demonstrated that changes inhigher-order chromat in structure were associated with alterations in gene expression. Specifically, genes in A compartments showed higher density and increased expression relative to those in B compartments. Moreover, the weakand enhanced insulation boundaries were identified, and the associated genes were enriched in the Wnt/ß-Catenin signaling pathway. We identified the gainedand lost loops in tumor and integrated these differences with transcriptional changes to examine the functional relevance of the identified loops. Notably, we observed an enhanced insulation boundary and a greater number of loops in the TCF7L2 gene region within tumors, which was accompanied by an upregulation of TCF7L2 expression. Subsequently, TCF7L2 expression was confirmed through qRT-PCR, and upregulated TCF7L2 prompted cell proliferation and growth hormone (GH) secretion in vitro. CONCLUSION: Our results provide comprehensive 3D chromatin architecture maps of somatotroph tumors and offer a valuable resource for furthering the understanding of the underlying biology and mechanisms of gene expression regulation.


Sujet(s)
Chromatine , Humains , Chromatine/génétique , Chromatine/métabolisme , Tumeurs de l'hypophyse/génétique , Tumeurs de l'hypophyse/anatomopathologie , Tumeurs de l'hypophyse/métabolisme , Cellules somatotropes/métabolisme , Cellules somatotropes/anatomopathologie
8.
Article de Anglais | MEDLINE | ID: mdl-38619107

RÉSUMÉ

OBJECTIVE: Diminished ovarian reserve (DOR) has been a major challenge in infertility treatment. The present study aimed to compare the efficacy of progestin-primed ovarian stimulation (PPOS) regimen and antagonist regimen in infertile patients aged 35 years or older with DOR. METHODS: A retrospective study of 289 in vitro fertilization (IVF) cycles from April 2016 to June 2022 was performed. Propensity score matching (PSM) was used to balance the baseline characteristics between the two groups at a ratio of 1:1. RESULTS: After matching, there were 87 cycles in the PPOS group and 87 cycles in the antagonist group. The primary outcome measures included the incidence of premature LH surge, the number of retrieved oocytes, and the number of mature oocytes, which were comparable between the two groups (all P values >0.05). There were no significant differences in laboratory indicators and final clinical outcomes between the two groups (all P values >0.05). CONCLUSIONS: For DOR patients aged 35 years or older, the number of retrieved oocytes and the number of mature oocytes were comparable between the PPOS and antagonist groups. Moreover, the two regimens showed no difference in the inhibition of premature LH surge.

9.
Nutr Diabetes ; 14(1): 23, 2024 Apr 23.
Article de Anglais | MEDLINE | ID: mdl-38653987

RÉSUMÉ

BACKGROUND: The number of patients with type 1 diabetes rises rapidly around the world in recent years. Maternal diabetes has a detrimental effect on reproductive outcomes due to decreased oocyte quality. However, the strategies to improve the oocyte quality and artificial reproductive technology (ART) efficiency of infertile females suffering from diabetes have not been fully studied. In this study, we aimed to examine the effects of nicotinamide mononucleotide (NMN) on oocyte maturation of mouse with type 1 diabetes mouse and explore the underlying mechanisms of NMN's effect. METHODS: Streptozotocin (STZ) was used to establish the mouse models with type 1 diabetes. The successful establishment of the models was confirmed by the results of body weight test, fasting blood glucose test and haematoxylin and eosin (H&E) staining. The in vitro maturation (IVM) rate of oocytes from diabetic mice was examined. Immunofluorescence staining (IF) was performed to examine the reactive oxygen species (ROS) level, spindle/chromosome structure, mitochondrial function, actin dynamics, DNA damage and histone modification of oocytes, which are potential factors affecting the oocyte quality. The quantitative reverse transcription PCR (RT-qPCR) was used to detect the mRNA levels of Sod1, Opa1, Mfn2, Drp1, Sirt1 and Sirt3 in oocytes. RESULTS: The NMN supplementation increased the oocyte maturation rate of the mice with diabetes. Furthermore, NMN supplementation improved the oocyte quality by rescuing the actin dynamics, reversing meiotic defects, improving the mitochondrial function, reducing ROS level, suppressing DNA damage and restoring changes in histone modifications of oocytes collected from the mice with diabetes. CONCLUSION: NMN could improve the maturation rate and quality of oocytes in STZ-induced diabetic mice, which provides a significant clue for the treatment of infertility of the patients with diabetes.


Sujet(s)
Diabète expérimental , Diabète de type 1 , Dynamines , Nicotinamide mononucléotide , Ovocytes , Espèces réactives de l'oxygène , Animaux , Souris , Femelle , Ovocytes/effets des médicaments et des substances chimiques , Diabète de type 1/traitement médicamenteux , Diabète de type 1/métabolisme , Diabète expérimental/traitement médicamenteux , Espèces réactives de l'oxygène/métabolisme , Nicotinamide mononucléotide/pharmacologie , Mitochondries/effets des médicaments et des substances chimiques , Mitochondries/métabolisme , Sirtuine-1/métabolisme , Sirtuine-3/métabolisme , Techniques de maturation in vitro des ovocytes/méthodes , Superoxide dismutase-1 , Altération de l'ADN/effets des médicaments et des substances chimiques , Streptozocine , Ovogenèse/effets des médicaments et des substances chimiques
10.
Chem Commun (Camb) ; 60(31): 4230-4233, 2024 Apr 11.
Article de Anglais | MEDLINE | ID: mdl-38526583

RÉSUMÉ

Lead-free perovskite microcrystals (MCs) have been regarded as promising potential photocatalysts, owing to their high molar extinction coefficient, low economic cost, adjustable light absorption range, and ample surface-active sites. Herein, C-3 thio/selenocyanation of indoles is demonstrated in high selectivity and yield by using lead-free double perovskite Cs2AgBiBr6 MCs under visible light irradiation. Moreover, the photocatalyst can be recycled at least 5 times without a significant decrease in catalytic activity.

11.
Int Immunopharmacol ; 130: 111761, 2024 Mar 30.
Article de Anglais | MEDLINE | ID: mdl-38422769

RÉSUMÉ

The chimeric antigen receptor T (CAR-T) cell therapy significantly enhances the prognosis of various hematologic malignancies; however, the systemic expansion of CAR-T cells also gives rise to severe cytokine release syndrome (CRS), and immune effector cell-associated neurotoxicity syndrome (ICANS). Despite the successful application of corticosteroids and tocilizumab in alleviating severe CRS in most patients, there are still individuals who experience life-threatening CRS without responding to the aforementioned therapies. In our retrospective cohort, we conducted an analysis of clinical and laboratory parameters, including inflammatory cytokines, in 17 patients from three centers who underwent therapeutic plasma exchange (TPE) for refractory CRS with or without ICANS following CAR-T products treatment. Our findings demonstrate a significant improvement in both clinical symptoms and laboratory parameters subsequent to TPE treatment. The rapid decrease in temperature and levels of inflammatory indexes indicates the remarkable scavenging efficacy of TPE against cytokine storm following CAR-T therapy. In conclusion, TPE may serve as a valuable and safe adjunct to corticosteroids and tocilizumab in the management of severe CRS resulting from CAR-T cell infusion. We eagerly await further prospective studies to validate this finding.


Sujet(s)
Anticorps monoclonaux humanisés , Syndromes neurotoxiques , Récepteurs chimériques pour l'antigène , Humains , Syndrome de libération de cytokines/thérapie , Syndrome de libération de cytokines/traitement médicamenteux , Récepteurs aux antigènes des cellules T , Échange plasmatique , Études prospectives , Études rétrospectives , Immunothérapie adoptive/méthodes , Syndromes neurotoxiques/traitement médicamenteux , Hormones corticosurrénaliennes/usage thérapeutique
12.
Chem Commun (Camb) ; 60(18): 2516-2519, 2024 Feb 27.
Article de Anglais | MEDLINE | ID: mdl-38324066

RÉSUMÉ

Allyl sulfones are important sulfur-containing compounds that have widespread applications in organic synthesis, medicinal chemistry and materials science. Herein, nickel-catalysed dehydrosulfonylation of unactivated allyl alcohols with aryl sulfonyl hydrazides without additional active agents under mild conditions was developed. A variety of functional allyl sulfones could be efficiently synthesized in the presence of air-stable Ni(acac)2 as the catalyst and 1,1'-bis(diphenylphosphino)ferrocene (DPPF) as the ligand.

13.
J Vis Exp ; (203)2024 Jan 26.
Article de Anglais | MEDLINE | ID: mdl-38345229

RÉSUMÉ

Round spermatids, characterized by their haploid genetic content, represent the precursor cells to mature spermatozoa. Through the innovative technique of round spermatid injection (ROSI), oocytes can be successfully fertilized and developed into viable fetuses. In a groundbreaking milestone achieved in 1995, the first mouse fetus was born through ROSI technology. ROSI has since emerged as a pivotal tool for unraveling the intricate mechanisms governing embryonic development and holds significant potential in various applications, including the acceleration of mouse generation and the production of genetically modified mice. In 1996, a milestone was reached when the first human fetus was born through ROSI technology. However, the clinical applications of this method have shown a fluctuating pattern of success and failure. To date, ROSI technology has not found widespread application in clinical practice, primarily due to its low birth efficiency and insufficient validation of fetal safety. This article provides a comprehensive account of the precise methods of performing ROSI in mice, aiming to shed new light on basic research and its potential clinical applications.


Sujet(s)
Injections intracytoplasmiques de spermatozoïdes , Spermatides , Grossesse , Mâle , Femelle , Souris , Animaux , Humains , Injections intracytoplasmiques de spermatozoïdes/méthodes , Spermatozoïdes , Ovocytes , Développement embryonnaire
14.
Ann Hematol ; 103(3): 969-980, 2024 Mar.
Article de Anglais | MEDLINE | ID: mdl-38214708

RÉSUMÉ

Chimeric antigen receptor T (CAR-T) cell therapy targeting CLL1 has been considered a potent weapon for patients with acute myeloid leukemia (AML). This study aims to evaluate the efficacy and toxicity of CLL1 CAR-T cell therapy in a larger cohort, with particular attention to cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS). Among the 32 patients assessed for efficacy, complete remission occurred in 71.88% (23/32) of cases and undetectable minimal residual disease in 14 patients. The CRS developed in all patients, with 8 individuals experiencing ICANS. Severe CRS and ICANS were observed in 11 and 2 patients, respectively. Furthermore, the Endothelial Activation and Stress Index (EASIX) and its derivatives measured before and after CLL1 CAR-T cell infusion were employed for predicting the severe complications. Significant differences were observed in EASIX scores on the day before lymphodepletion (Day BL, P = 0.023), -1 (P < 0.001), +1 (P < 0.001), and +3(P = 0.014); sEASIX scores on Day BL (P = 0.007), -1 (P < 0.001), +1 (P < 0.001), and +3 (P < 0.001); and mEASIX score on Day -1 (P = 0.004) between patients with mild and severe CRS/ICANS. Additionally, there was a significant difference in mEASIX scores between responders and non-responders on Day BL (P = 0.004) and Day -1 (P = 0.044). Our findings indicate that pre- and post-infusion assessments of EASIX/mEASIX/sEASIX scores serve as reliable prognostic indicators for severe CRS/ICANS and treatment response following CLL1 CAR-T cell therapy, which can assist physicians in implementing preemptive treatment strategies for potential severe complications and screening patients who are suitable candidates for CLL1 CAR-T cell therapy. EASIX/mEASIX/sEASIX scores serve as reliable prognostic indicators for severe CRS/ICANS following CLL1 CAR-T cell therapy. The preinfusion mEASIX scores of CLL1 CAR-T cells can effectively predict treatment response.


Sujet(s)
Leucémie aigüe myéloïde , Syndromes neurotoxiques , Récepteurs chimériques pour l'antigène , Humains , Syndrome de libération de cytokines , Leucémie aigüe myéloïde/diagnostic , Leucémie aigüe myéloïde/thérapie , Thérapie cellulaire et tissulaire
15.
Medicine (Baltimore) ; 102(48): e36236, 2023 Dec 01.
Article de Anglais | MEDLINE | ID: mdl-38050213

RÉSUMÉ

Lipoprotein(a) [Lp(a)] has been confirmed as a causal risk factor of atherosclerotic cardiovascular disease, but its role on circulation is not completely clear and is still being explored. Therefore, this study attempts to explore the relationship between Lp(a) and whole blood reducing viscosity (WBRV), to better understand the role of Lp(a) in circulatory and cardiovascular diseases. We retrospectively analyzed the data of consecutive subjects in the physical examination center of the Affiliated Hospital of Ningbo University Medical College from January 2022 to May 2022. Pearson or spearman correlation analysis was used to test the statistical relationship between 2 continuous variables according to whether they are normal; 131 participants were retrospectively enrolled in this study. The low-density lipoprotein concentration was associated with whole blood viscosity at low-shear (R = 0.220, P = .012), middle-shear (R = 0.226, P = .01), and high-shear viscosity (R = 0.212, P = .015), as well as plasma viscosity (RS = 0.207, P = .018). Lp(a) was not associated with whole blood viscosity at low, middle, and high shear rates, but was associated with WBRV at low shear (RS = 0.204, P = .019) and middle shear rates (RS = 0.197, P = .024). Lp(a) is associated with high WBRV, which may impart more insights into the role of Lp(a) in cardiovascular disease.


Sujet(s)
Viscosité sanguine , Maladies cardiovasculaires , Lipoprotéine (a) , Humains , Études transversales , Études rétrospectives , Facteurs de risque
16.
Front Mol Biosci ; 10: 1249744, 2023.
Article de Anglais | MEDLINE | ID: mdl-38143799

RÉSUMÉ

Introduction: Cadmium (Cd) is a hazardous environmental pollutant present in soil, water, and food. Accumulation of Cd in organisms can cause systematic injury and damage to the kidney. The Masson pine pollen aqueous extract (MPPAE) has attracted increasing attention due to its antioxidant activity and ability to enhance immunity. Methods: In this study, we investigated the potential of MPPAE to protect against Cd-induced kidney damage in rats and the underlying mechanism. The transcriptome and metabolome of rats with Cd-induced kidney damage, following treatment with MPPAE, were explored. Results: The concentrations of superoxide dismutase (SOD) and malondialdehyde (MDA) were both significantly altered after treatment with MPPAE. Furthermore, sequencing and analysis of the transcriptome and metabolome of rats with Cd-induced kidney damage, following treatment with MPPAE, revealed differential expression of numerous genes and metabolites compared with the untreated control rats. These differentially expressed genes (DEGs) included detoxification-related genes such as cytochrome P450 and the transporter. The differentially expressed metabolites (DEMs) included 4-hydroxybenzoic acid, L-ascorbate, and ciliatine. Conjoint transcriptome and metabolome analysis showed that several DEGs were correlated with DEMs. Conclusion: These preliminary findings indicate the potential of MPPAE for the treatment of toxic metal poisoning.

17.
Int J Mol Sci ; 24(24)2023 Dec 08.
Article de Anglais | MEDLINE | ID: mdl-38139111

RÉSUMÉ

It is widely recognized that macrophage cholesterol efflux mediated by the ATP-binding cassette transporter A1 (ABCA1) constitutes the initial and rate-limiting step of reverse cholesterol transport (RCT), displaying a negative correlation with the development of atherosclerosis. Although the transcriptional regulation of ABCA1 has been extensively studied in previous research, the impact of post-translational regulation on its expression remains to be elucidated. In this study, we report an AMP-activated protein kinase (AMPK) agonist called ((2R,3S,4R,5R)-3,4-dihydroxy-5-(6-((3-hydroxyphenyl) amino)-9H-purin-9-yl) tetrahydrofuran-2-yl) methyl dihydrogen phosphate (MP), which enhances ABCA1 expression through post-translational regulation rather than transcriptional regulation. By integrating the findings of multiple experiments, it is confirmed that MP directly binds to AMPK with a moderate binding affinity, subsequently triggering its allosteric activation. Further investigations conducted on macrophages unveil a novel mechanism through which MP modulates ABCA1 expression. Specifically, MP downregulates the Cav1.2 channel to obstruct the influx of extracellular Ca2+, thereby diminishing intracellular Ca2+ levels, suppressing calcium-activated calpain activity, and reducing the interaction strength between calpain and ABCA1. This cascade of events culminates in the deceleration of calpain-mediated degradation of ABCA1. In conclusion, MP emerges as a potentially promising candidate compound for developing agents aimed at enhancing ABCA1 stability and boosting cellular cholesterol efflux and RCT.


Sujet(s)
AMP-Activated Protein Kinases , Calpain , Calpain/métabolisme , AMP-Activated Protein Kinases/métabolisme , Cholestérol/métabolisme , Macrophages/métabolisme , Protéolyse , Membre-1 de la sous-famille A des transporteurs à cassette liant l'ATP/génétique , Membre-1 de la sous-famille A des transporteurs à cassette liant l'ATP/métabolisme
18.
Medicine (Baltimore) ; 102(47): e36113, 2023 Nov 24.
Article de Anglais | MEDLINE | ID: mdl-38013277

RÉSUMÉ

In the process of spermatogenesis and maturation, histones of the sperm nucleus were gradually replaced by protamine. Abnormal sperm nucleoprotein histotype conversion can make sperm DNA unstable and affect sperm function. The aim of this study is to investigate the impact of high and low proportion of sperm histone positivity in semen sample on embryonic development and assisted reproductive technology results, and to evaluate its diagnostic value in assisted reproduction. Sperm nuclear status was detected with aniline blue staining. Under acidic conditions, aniline blue combines with histones rich in lysine residues to form blue compounds. The groups were divided according to the critical value of sperm histone positive ratio of 30%. Using the intracytoplasmic sperm injection procedure, the fertilization rate and normal fertilization rate in the normal sperm histone positive ratio group were significantly higher than those in the abnormal group, and the difference was statistically significant (P < .001). Using the in vitro fertilization procedure, the effect of sperm histone positive ratio on each index was not statistically different. Overall the study provides some preliminary evidence that abnormal sperm histones may be a factor that affects the fertilization success of intracytoplasmic sperm injection procedures. However, more research is needed to confirm this finding to determine the exact mechanism by which abnormal sperm histones affect fertilization.


Sujet(s)
Chromatine , Histone , Grossesse , Femelle , Humains , Mâle , Sperme , Spermatozoïdes , Fécondation in vitro/méthodes , Développement embryonnaire
19.
Chem Asian J ; 18(23): e202300757, 2023 Dec 01.
Article de Anglais | MEDLINE | ID: mdl-37817327

RÉSUMÉ

A redox-neutral nickel-catalysed sulfonylation for arylsulfone synthesis was developed. (Hetero)aryl boronic acids reacted with potassium metabisulfite (K2 S2 O5 ) and readily available 2-chlorothiazoles in the presence of air-stable Ni(OTf)2 and 4,4-di-tert-butyl bipyridine (dtbpy) as a commercially available ligand to produce the corresponding 2-sulfonylthiazoles in moderate to excellent yields. This practical protocol tolerates a wide range of substrates including boronic acids and 2-chloro(benzo)thiazoles without additional bases, allowing the direct synthesis of functional arylsulfones.

20.
Front Endocrinol (Lausanne) ; 14: 1167776, 2023.
Article de Anglais | MEDLINE | ID: mdl-37854185

RÉSUMÉ

Objective: To investigate the clinical and pathological factors associated with preoperative hypothalamus invasion and postoperative outcomes of adamantinomatous craniopharyngiomas (ACPs) after the expanded endonasal approach (EEA) resection. Methods: Ninety-three specimens of ACPs, consisting of 71 primary and 22 recurrent tumors, were investigated for the expression of TGF-ß1, SMAD2, SMAD3, and ß-catenin by immunohistochemistry staining. The clinical information of relevant patients, including the extent of resection, hypothalamus invasion, endocrinopathy, complications, and prognosis, was reviewed. The relationships between the expression of these immunopathological markers and clinical factors were analyzed. Results: Endocrinological dysfunctions were more common in recurrent patients and primary patients with hypothalamus invasion in the comparisons. For recurrent patients, the rate of gross total resection (GTR) was significantly lower than for primary patients (63.6% vs. 90.1%, P = 0.007). According to radiological and intraoperative findings, invasive ACPs (IACPs) included 48 (67.6%) cases in primary tumors. The expression of TGF-ß1 and ß-catenin was significantly higher in recurrent tumors (P = 0.021 and P = 0.018, respectively) and IACPs (P = 0.008 and P = 0.004, respectively). The expression level of TGF-ß1 was associated with hypothalamus involvement (Puget grade, P = 0.05; Vile grade, P = 0.002), postoperative endocrinopathy (P = 0.01), and pituitary stalk preservation (P = 0.008) in primary patients. In addition, the extent of resection, treatment history, hypothalamic invasion, and level of TGF-ß1 expression had significant influences on tumor recurrence/progression after surgery separately. Conclusion: Our study demonstrated the potential role of TGF-ß1 in the regulation of hypothalamus invasion in ACPs and the prediction of prognosis after EEA surgery. The TGF-ß signaling pathway may represent a crucial mechanism in the aggressive behavior and progression of ACPs.


Sujet(s)
Craniopharyngiome , Tumeurs de l'hypophyse , Facteur de croissance transformant bêta-1 , Humains , bêta-Caténine , Craniopharyngiome/métabolisme , Craniopharyngiome/anatomopathologie , Craniopharyngiome/chirurgie , Récidive tumorale locale/anatomopathologie , Tumeurs de l'hypophyse/métabolisme , Tumeurs de l'hypophyse/anatomopathologie , Tumeurs de l'hypophyse/chirurgie , Transduction du signal , Facteur de croissance transformant bêta-1/biosynthèse
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