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2.
Elife ; 122024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39365728

RESUMEN

Mutations in the well-known Myostatin (MSTN) produce a 'double-muscle' phenotype, which makes it commercially invaluable for improving livestock meat production and providing high-quality protein for humans. However, mutations at different loci of the MSTN often produce a variety of different phenotypes. In the current study, we increased the delivery ratio of Cas9 mRNA to sgRNA from the traditional 1:2 to 1:10, which improves the efficiency of the homozygous mutation of biallelic gene. Here, a MSTNDel73C mutation with FGF5 knockout sheep, in which the MSTN and FGF5 dual-gene biallelic homozygous mutations were produced via the deletion of 3-base pairs of AGC in the third exon of MSTN, resulting in cysteine-depleted at amino acid position 73, and the FGF5 double allele mutation led to inactivation of FGF5 gene. The MSTNDel73C mutation with FGF5 knockout sheep highlights a dominant 'double-muscle' phenotype, which can be stably inherited. Both F0 and F1 generation mutants highlight the excellent trait of high-yield meat with a smaller cross-sectional area and higher number of muscle fibers per unit area. Mechanistically, the MSTNDel73C mutation with FGF5 knockout mediated the activation of FOSL1 via the MEK-ERK-FOSL1 axis. The activated FOSL1 promotes skeletal muscle satellite cell proliferation and inhibits myogenic differentiation by inhibiting the expression of MyoD1, and resulting in smaller myotubes. In addition, activated ERK1/2 may inhibit the secondary fusion of myotubes by Ca2+-dependent CaMKII activation pathway, leading to myoblasts fusion to form smaller myotubes.


Asunto(s)
Sistemas CRISPR-Cas , Factor 5 de Crecimiento de Fibroblastos , Miostatina , Animales , Miostatina/genética , Miostatina/metabolismo , Ovinos , Factor 5 de Crecimiento de Fibroblastos/genética , Factor 5 de Crecimiento de Fibroblastos/metabolismo , Fibras Musculares Esqueléticas/metabolismo , Fibras Musculares Esqueléticas/patología , Mutación , Técnicas de Inactivación de Genes , Hiperplasia/genética , Músculo Esquelético/metabolismo , Músculo Esquelético/patología
3.
Biometrics ; 80(4)2024 Oct 03.
Artículo en Inglés | MEDLINE | ID: mdl-39360905

RESUMEN

Optimizing doses for multiple indications is challenging. The pooled approach of finding a single optimal biological dose (OBD) for all indications ignores that dose-response or dose-toxicity curves may differ between indications, resulting in varying OBDs. Conversely, indication-specific dose optimization often requires a large sample size. To address this challenge, we propose a Randomized two-stage basket trial design that Optimizes doses in Multiple Indications (ROMI). In stage 1, for each indication, response and toxicity are evaluated for a high dose, which may be a previously obtained maximum tolerated dose, with a rule that stops accrual to indications where the high dose is unsafe or ineffective. Indications not terminated proceed to stage 2, where patients are randomized between the high dose and a specified lower dose. A latent-cluster Bayesian hierarchical model is employed to borrow information between indications, while considering the potential heterogeneity of OBD across indications. Indication-specific utilities are used to quantify response-toxicity trade-offs. At the end of stage 2, for each indication with at least one acceptable dose, the dose with highest posterior mean utility is selected as optimal. Two versions of ROMI are presented, one using only stage 2 data for dose optimization and the other optimizing doses using data from both stages. Simulations show that both versions have desirable operating characteristics compared to designs that either ignore indications or optimize dose independently for each indication.


Asunto(s)
Teorema de Bayes , Relación Dosis-Respuesta a Droga , Dosis Máxima Tolerada , Ensayos Clínicos Controlados Aleatorios como Asunto , Humanos , Ensayos Clínicos Controlados Aleatorios como Asunto/estadística & datos numéricos , Proyectos de Investigación , Simulación por Computador , Tamaño de la Muestra , Modelos Estadísticos , Biometría/métodos
4.
Langmuir ; 2024 Sep 12.
Artículo en Inglés | MEDLINE | ID: mdl-39264301

RESUMEN

Due to the easy oxidation of Sn2+, which leads to form tin vacancy defects and poor perovskite film quality, caused by the rapid crystallization rate in tin-based perovskite solar cells (PSCs), their efficiency lags far behind that of lead-based PSCs. To improve the photovoltaic (PV) performance and stability of FA0.9PEA0.1SnI3-based PSCs (T-PSCs), a small amount of Pb(SCN)2 is introduced into a perovskite precursor as an antioxidant, and acetaminophen (ACE) with various functional groups is used to modify a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/perovskite interface. The results show that the Pb(SCN)2 additive and ACE interfacial modification can not only optimize energy level alignment in T-PSCs but also inhibit Sn2+ oxidation to reduce the trap-state density, resulting in promoted carrier transport. The synergetic effect of the Pb(SCN)2 antioxidant and ACE interfacial modification significantly reduces nonradiative recombination and improves the PV performance and stability of T-PSCs. Consequently, the unsealed T-PSCs with the Pb(SCN)2 additive and ACE modification achieve a champion efficiency of 12.04% and maintain 99% of their initial PCE after being stored in N2 for more than 2100 h, while reference T-PSCs demonstrate a champion PCE of 6.20% and retain only 72% of its initial PCE. Moreover, the modified T-PSCs without encapsulation demonstrate much better stability in humid air.

5.
bioRxiv ; 2024 Sep 19.
Artículo en Inglés | MEDLINE | ID: mdl-39345610

RESUMEN

Necroptosis initiated by the host sensor Z-NA Binding Protein-1 (ZBP1) is essential for host defense against a growing number of viruses, including Herpes Simplex Virus-1 (HSV-1). Studies with HSV-1 and other necroptogenic stimuli in murine settings have suggested that ZBP1 triggers necroptosis by directly complexing with the kinase RIPK3. Whether this is also the case in human cells, or whether additional co-factors are needed for ZBP1-mediated necroptosis, is unclear. Here, we show that ZBP1-induced necroptosis in human cells requires RIPK1. We have found that RIPK1 is essential for forming a stable and functional ZBP1-RIPK3 complex in human cells, but is dispensable for the formation of the equivalent murine complex. The RIP Homology Interaction Motif (RHIM) in RIPK3 is responsible for this difference between the two species, because replacing the RHIM in human RIPK3 with the RHIM from murine RIPK3 is sufficient to overcome the requirement for RIPK1 in human cells. These observations describe a critical mechanistic difference between mice and humans in how ZBP1 engages in necroptosis, with important implications for treating human diseases.

6.
China CDC Wkly ; 6(36): 924-933, 2024 Sep 06.
Artículo en Inglés | MEDLINE | ID: mdl-39346688

RESUMEN

The rapid emergence and widespread transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have prompted governments worldwide to enact policies and measures to manage the virus's spread. These interventions have substantially contributed to controlling disease transmission. However, they have also significantly disrupted daily life, leading to increased public fatigue and resistance to sustained control measures, a phenomenon known as pandemic fatigue. To develop a comprehensive understanding of pandemic fatigue, this review systematically explores the concept and identifies quantitative indicators for measuring it. We reviewed studies on pandemic fatigue across various countries, summarized the contributing factors, and analyzed its impact on personal protective behaviors. Our findings indicate that the enforcement of health measures significantly influences the onset of pandemic fatigue, while individual perceptions of risk can negatively affect personal protective behaviors, creating a feedback loop with increasing fatigue. These results underscore the importance of considering the current severity of the pandemic and individual decision-making processes in the implementation of interventions. Enhancing our understanding of pandemic fatigue is essential for developing effective policy responses in preparation for future potential epidemics.

7.
bioRxiv ; 2024 Oct 10.
Artículo en Inglés | MEDLINE | ID: mdl-39314484

RESUMEN

Traditional neural decoders model the relationship between neural activity and behavior within individual trials of a single experimental session, neglecting correlations across trials and sessions. However, animals exhibit similar neural activities when performing the same behavioral task, and their behaviors are influenced by past experiences from previous trials. To exploit these informative correlations in large datasets, we introduce two complementary models: a multi-session reduced-rank model that shares similar behaviorally-relevant statistical structure in neural activity across sessions to improve decoding, and a multi-session state-space model that shares similar behavioral statistical structure across trials and sessions. Applied across 433 sessions spanning 270 brain regions in the International Brain Laboratory public mouse Neuropixels dataset, our decoders demonstrate improved decoding accuracy for four distinct behaviors compared to traditional approaches. Unlike existing deep learning approaches, our models are interpretable and efficient, uncovering latent behavioral dynamics that govern animal decision-making, quantifying single-neuron contributions to decoding behaviors, and identifying different activation timescales of neural activity across the brain. Code: https://github.com/yzhang511/neural_decoding.

8.
Eur Psychiatry ; 67(1): e58, 2024 Sep 25.
Artículo en Inglés | MEDLINE | ID: mdl-39320861

RESUMEN

BACKGROUND: Cardiometabolic diseases (CMDs) including heart disease, stroke, and type 2 diabetes have been individually linked to depression. However, their combined impact on depression risk is unclear. We aimed to examine the association between cardiometabolic multimorbidity and depression and explore the role of genetic background in this association. METHODS: Within the Swedish Twin Registry, 40,080 depression-free individuals (mean age 60 years) were followed for 18 years. Cardiometabolic multimorbidity was defined as having ≥2 CMDs. CMDs and depression were ascertained based on the National Patient Register. Cox regression was used to estimate the CMD-depression association in a classical cohort study design and a matched co-twin design involving 176 twin pairs. By comparing the associations between monozygotic and dizygotic co-twins, the contribution of genetic background was estimated. RESULTS: At baseline, 4809 (12.0%) participants had one CMD and 969 (2.4%) had ≥2 CMDs. Over the follow-up period, 1361 participants developed depression. In the classical cohort design, the multi-adjusted hazard ratios (95% confidence interval [CIs]) of depression were 1.52 (1.31-1.76) for those with one CMD and 1.83 (1.29-2.58) for those with ≥2 CMDs. CMDs had a greater risk effect on depression if they developed in mid-life (<60 years) as opposed to late life (≥60 years). In matched co-twin analysis, the CMD-depression association was significant among dizygotic twins (HR = 1.63, 95% CI, 1.02-2.59) but not monozygotic twins (HR = 0.90, 95% CI, 0.32-2.51). CONCLUSIONS: Cardiometabolic multimorbidity is associated with an elevated risk of depression. Genetic factors may contribute to the association between CMDs and depression.


Asunto(s)
Multimorbilidad , Sistema de Registros , Humanos , Masculino , Femenino , Persona de Mediana Edad , Suecia/epidemiología , Sistema de Registros/estadística & datos numéricos , Anciano , Depresión/epidemiología , Depresión/genética , Gemelos Monocigóticos/genética , Enfermedades Cardiovasculares/epidemiología , Enfermedades Cardiovasculares/genética , Gemelos Dicigóticos/estadística & datos numéricos , Diabetes Mellitus Tipo 2/epidemiología , Diabetes Mellitus Tipo 2/genética
9.
Res Sq ; 2024 Sep 02.
Artículo en Inglés | MEDLINE | ID: mdl-39281863

RESUMEN

Doublet microtubules (DMTs) are flagellar components required for the protist Trichomonas vaginalis (Tv) to swim through the human genitourinary tract to cause trichomoniasis, the most common non-viral sexually transmitted disease. Lack of DMT structures has prevented structure-guided drug design to manage Tv infection. Here, we determined the cryo-EM structure of native Tv-DMTs, identifying 29 unique proteins, including 18 microtubule inner proteins and 9 microtubule outer proteins. While the A-tubule is simplistic compared to DMTs of other organisms, the B-tubule features specialized, parasite-specific proteins, such as TvFAP40 and TvFAP35 that form filaments near the inner and outer junctions, respectively, to stabilize DMTs and enable Tv locomotion. Notably, a small molecule, assigned as IP6, is coordinated within a pocket of TvFAP40 and has characteristics of a drug molecule. This first atomic model of the Tv-DMT highlights the diversity of eukaryotic motility machinery and provides a structural framework to inform rational design of therapeutics.

10.
Fish Physiol Biochem ; 2024 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-39088110

RESUMEN

To investigate the influences of dietary protein and lipid levels on the growth, feed utilization, morphometric parameters, body composition, serum biochemical parameters, and lipid metabolism of golden pompano (Trachinotus ovatus), nine test diets containing three protein levels (35%, 40%, and 45%) and three lipid levels (8%, 13%, and 18%) were designed in the present study. Each diet (named D1-D9) was randomly assigned to feed triplicate groups of golden pompano juvenile (initial weight ~ 70 g) for 50 days. The results showed that the dietary lipid levels positively correlated with weight gain, specific growth rate, and protein efficiency ratio (PER), suggesting that the high lipid diets (18%) can be efficiently utilized in this fish species. The dietary protein levels have no significant influences on the growth and feed utilization except for the PER. Increasing dietary protein levels resulted in a decrease in hepatosomatic index (HSI), viscerosomatic index (VSI), and intestinal somatic index (ISI), while the dietary lipid level did not have a significant impact on morphological indices except for ISI. The dietary protein and lipid levels had no significant influences on the contents of crude lipid, crude ash, and moisture of whole body, while the crude protein contents was significantly affected by the dietary protein levels. Serum biochemical indexes, including cholesterol (CHO), triglycerides (TG), high-density lipoprotein cholesterol (HDL), and low-density lipoprotein cholesterol (LDL), as well as HDL/LDL ratio were significantly affected by the dietary lipid levels, but not by the dietary protein levels. The expression levels of genes and their associated proteins involved in hepatic lipogenesis (Srebp-1c and Fas) and fatty acids ß-oxidation (Pparα and Cpt-1) were up-regulated with increasing dietary lipid levels, while the former was up-regulated, and the latter was down-regulated with increasing dietary protein levels. Considering the present results in terms of growth performance, feed utilization, morphometric parameters, and lipid metabolism, the recommended dietary protein and lipid levels for golden pompano are 40% and 18%, respectively. The findings suggested that this species exhibits a significant protein-sparing effect on lipid utilization.

11.
Animals (Basel) ; 14(16)2024 Aug 14.
Artículo en Inglés | MEDLINE | ID: mdl-39199889

RESUMEN

Elongases of very-long-chain fatty acids (Elovls) are critical rate-limiting enzymes that are involved in LC-PUFA biosynthesis through catalyzing the two-carbon elongation of a pre-existing fatty acyl chain. Thus far, several Elovls have been extensively studied in teleost. However, the functional and physiological roles of Elovls in chondrichthyans have rarely been reported. In this study, we identified and characterized elovl2 from the endangered Chinese sturgeon (Acipenser sinensis) by whole genome scanning. The results show that the coding sequence of elovl2 was 894 bp in length, for a putative protein of 297 amnio acids. Comparative genomic analyses indicated that Chinese sturgeon elovl2 was evolutionarily conserved. Functional characterization in yeast demonstrated that the Chinese sturgeon Elovl2 could efficiently elongate C20 (ARA and EPA) and C22 (22:4n-6 and 22:5n-3) substrates, confirming its critical roles in LC-PUFA biosynthesis. Spatial and temporal expression analyses showed high elovl2 mRNA levels were detected in the liver and brain and showed an increase trend both in embryonic and post-hatching stages. Interestingly, diets with vegetable oils as lipid sources could significantly induce the high expression of elovl2 in Chinese sturgeon, implying that the endogenous LC-PUFA biosynthesis pathway was stimulated by lack of LC-PUFA in their diets. Our findings will enhance our understanding about the evolutionary and functional roles of elovl2 and provide novel insights into the LC-PUFA biosynthesis mechanism in vertebrates.

12.
J Mater Chem B ; 12(38): 9686-9694, 2024 Oct 02.
Artículo en Inglés | MEDLINE | ID: mdl-39193619

RESUMEN

The hypoxic microenvironment of solid tumors can lead to reduced therapeutic DNA damage to the tumor cells, thus diminishing tumor sensitivity to radiotherapy. Although hypoxic radiosensitizers can improve radiotherapy efficacy by enhancing the role of oxygen, their effects are limited by the uneven distribution of oxygen within solid tumor tissues. In this study, a novel radiosensitizer via leveraging gold complexes and metronidazole (MN) was synthesized to improve radiotherapeutic efficacy. The gold atoms incorporated in the radiosensitizer enabled efficient deposition of high-energy radiation; the hydrophobic metronidazole was reduced to hydrophilic aminoimidazole under hypoxia conditions and further promoted radiotherapy sensitization. The results of CCK-8 assays, Live/Dead assays, γ-H2AX immunofluorescence indicated that metronidazole-modified Au@BSA nanocomposites (NCs) exhibited excellent antitumor effects. The in vivo antitumor tests further showed an inhibition rate of 100%. These results demonstrated that the NCs successfully enhanced radiotherapy efficacy by the dual sensitization strategy. Overall, we believe this multimodal radiosensitizing nanocomplex can significantly inhibit tumor growth and metastasis, with their hypoxia-oriented characteristics ensuring a higher efficacy and safety.


Asunto(s)
Antineoplásicos , Oro , Metronidazol , Nanocompuestos , Fármacos Sensibilizantes a Radiaciones , Oro/química , Oro/farmacología , Metronidazol/química , Metronidazol/farmacología , Fármacos Sensibilizantes a Radiaciones/química , Fármacos Sensibilizantes a Radiaciones/farmacología , Nanocompuestos/química , Animales , Humanos , Ratones , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/síntesis química , Proliferación Celular/efectos de los fármacos , Ratones Endogámicos BALB C , Ensayos de Selección de Medicamentos Antitumorales , Tamaño de la Partícula , Neoplasias/tratamiento farmacológico , Ratones Desnudos , Femenino
13.
Animals (Basel) ; 14(15)2024 Jul 28.
Artículo en Inglés | MEDLINE | ID: mdl-39123722

RESUMEN

Inappropriate substitution of dietary fishmeal (FM) can adversely affect the growth, health, and metabolism of carnivorous fish species. To effectively reduce the amount of dietary FM in carnivorous largemouth bass (Micropterus salmoides), a terrestrial compound protein (Cpro) with chicken meal, bone meal, and black soldier fly protein was used to formulate four isoproteic (52%) and isolipidic (12%) diets, namely T1 (36% FM), T2 (30% FM), T3 (24% FM), and T4 (18% FM), for feeding juveniles (initial weight: ~12 g) for 81 days. Results indicated that the growth performance, feed efficiency, and morphological indicators, as well as muscle texture and edible quality of fish, did not differ significantly among the four groups. However, the muscle protein contents and ATP/AMP ratio of fish in the T4 group were significantly increased in comparison with those of fish in the T1 group, while the opposite was true for muscle glycogen. Compared with the T1 group, high serum total amino acid and MDA contents, as well as low AST activities, were observed in the T3 and T4 groups, and relatively high intestinal trypsin and lipase activities were found in the T2-T4 groups. The transcripts of intestinal proinflammatory cytokines (il-1ß, il-6, and tnf-α) were downregulated in the T2-T4 groups compared with T1 group, while the expression of anti-inflammatory cytokines (il-10) and tight junction (zo-1 and occludin) showed the reverse trend. The mRNA expression of positive regulators related to protein synthesis (sirt1, pgc1-α, pi3k, and akt) were significantly upregulated in the muscle of fish fed diets T3 and T4, while their negative regulators (4e-bp1) mRNA levels were downregulated. The results indicate that the dietary FM of largemouth bass could be effectively reduced to at least 18% by the Cpro, which is beneficial to health, digestion, and protein synthesis for maintaining accelerated growth.

14.
Aesthetic Plast Surg ; 2024 Aug 12.
Artículo en Inglés | MEDLINE | ID: mdl-39134680

RESUMEN

BACKGROUND: Mandibular genioplasty, a central procedure in oral and maxillofacial surgery, has traditionally relied on surgeon experience with potential limitations in precision. The advent of digital methods, particularly computer-aided design/computer-aided manufacturing (CAD/CAM), offers a promising alternative. This study aims to evaluate the efficacy of digital surgical guides in improving the precision of mandibular genioplasty. METHODS: A prospective analysis of 50 patients undergoing genioplasty was performed, 30 in the experimental group using digital surgical guides and 20 in the control group using traditional methods. Three-dimensional reconstructions were obtained using cone-beam computed tomography (CBCT) and digital scans. Osteotomy guides were 3D-printed based on group assignment. Postoperatively, accuracy was assessed by measuring distances between landmarks. RESULTS: The experimental group showed significantly reduced horizontal positioning errors in genioplasty advancement, with no significant differences in vertical errors. For genioplasty retraction, the experimental group showed fewer vertical positioning errors, while horizontal errors remained consistent. CONCLUSIONS: The use of digital surgical guides in mandibular genioplasty significantly improves surgical accuracy, resulting in improved outcomes and patient satisfaction. This study highlights the potential of digital methods in refining oral and maxillofacial surgical procedures. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

15.
Bioorg Chem ; 151: 107675, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39126868

RESUMEN

Rho-associated coiled-coil kinase (ROCK) is involved in multiple cellular activities regulating the actin cytoskeleton, such as cell morphology, adhesion, and migration. The inhibition of ROCK is a feasible strategy to suppress breast cancer metastasis. Herein, based on Belumosudil, a series of pyrazolo[1,5-a]pyrimidine derivatives as selective ROCK2 inhibitors were designed and synthesized. Through systematic investigation of SARs, the piperazine analog 7u was identified with optimum ROCK2 inhibitory activity (IC50 = 36.8 nM) and excellent selectivity over the isoform protein ROCK1 (>250-fold). Intriguingly, upon treatment with 7u, the arrangement of the MDA-MB-231 cytoskeleton was affected accompanied by the alteration of morphology. Furthermore, cell scratch and transwell assays indicated that 7u inhibited MDA-MB-231 cell migration and invasion in a dose-dependent manner. Ultimately, the binding model of 7u with ROCK2 well accounted for the superior activities of 7u as a promising ROCK2 inhibitor with the potential application in breast cancer metastasis treatment.


Asunto(s)
Antineoplásicos , Neoplasias de la Mama , Movimiento Celular , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Inhibidores de Proteínas Quinasas , Pirazoles , Pirimidinas , Quinasas Asociadas a rho , Humanos , Quinasas Asociadas a rho/antagonistas & inhibidores , Quinasas Asociadas a rho/metabolismo , Movimiento Celular/efectos de los fármacos , Pirimidinas/farmacología , Pirimidinas/química , Pirimidinas/síntesis química , Inhibidores de Proteínas Quinasas/farmacología , Inhibidores de Proteínas Quinasas/química , Inhibidores de Proteínas Quinasas/síntesis química , Neoplasias de la Mama/tratamiento farmacológico , Neoplasias de la Mama/patología , Relación Estructura-Actividad , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/síntesis química , Femenino , Pirazoles/farmacología , Pirazoles/química , Pirazoles/síntesis química , Estructura Molecular , Proliferación Celular/efectos de los fármacos , Línea Celular Tumoral , Descubrimiento de Drogas , Simulación del Acoplamiento Molecular
16.
Diabetes Metab Syndr Obes ; 17: 2693-2706, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39007156

RESUMEN

Purpose: To explore the correlation between hemoglobin, albumin, lymphocyte count, platelet count (HALP) score and type 2 diabetic retinopathy (DR). Methods: The study was conducted on 674 patients with type 2 diabetes (T2DM). According to the results of the fundus examination, they were divided into non-diabetic retinopathy group (NDR, n=388) and diabetic retinopathy group (DR, n=286). Collected patients baseline data, calculated HALP score, analyzed the correlation between HALP score and DR. Results: In all patients, male patients and female patients, the HALP score of the DR group was lower than that of the NDR group (P<0.001), and the HALP score was negatively correlated with the incidence of DR (P<0.05). HALP score was independent risk factors for DR, regardless of gender. In male patients, HALP score and DR had a linear relationship, but in female patients, HALP score and DR showed a nonlinear relationship, and HALP score was more sensitive to the onset of DR in male patients. The combined diagnostic model of HALP score, course of disease, SBP and BUN was used to diagnose DR, and it was found that the diagnostic value was the highest among male patients, with AUC of 0.761, sensitivity of 58.3% and specificity of 80.3%. Conclusion: HALP score was an independent risk factor for DR, attention should be paid to monitoring HALP score, especially in male T2DM patients. The accuracy of HALP score, disease course, SBP and BUN combined model diagnosis of DR was high, which can become a biological indicator for early screening of DR.

17.
Int Immunopharmacol ; 138: 112652, 2024 Sep 10.
Artículo en Inglés | MEDLINE | ID: mdl-38986301

RESUMEN

Tendinopathy is one of the most prevalent sports injury diseases in orthopedics. However, there is no effective treatment or medicine. Recently, the discovery of tendon stem cells (TSCs) provides a new perspective to find new therapeutic methods for Tendinopathy. Studies have shown that oxidative stress will inevitably cause TSCs injury during tendinopathy, but the mechanism has not been fully elucidated. Here, we report the oxidative damage of TSCs induced by H2O2 via ferroptosis, as well, treatment with H2O2 raised the proportion of mitochondria engulfed by autophagosomes in TSCs. The suppression of mitophagy by Mdivi-1 significantly attenuates the H2O2-induced ferroptosis in TSCs. Mechanically, H2O2 actives the cGAS-STING pathway, which can regulate the level of mitophagy. Interfering with cGAS could impair mitophagy and the classical ferroptotic events. In the rat model of tendinopathy, interference of cGAS could relieve tendon injury by inhibiting ferroptosis. Overall, these results provided novel implications to reveal the molecular mechanism of tendinopathy, by which pointed to cGAS as a potential therapeutic target for the treatment of tendinopathy.


Asunto(s)
Ferroptosis , Peróxido de Hidrógeno , Proteínas de la Membrana , Mitofagia , Nucleotidiltransferasas , Estrés Oxidativo , Transducción de Señal , Células Madre , Tendones , Mitofagia/efectos de los fármacos , Animales , Nucleotidiltransferasas/metabolismo , Proteínas de la Membrana/metabolismo , Células Madre/metabolismo , Tendones/patología , Tendones/metabolismo , Ratas , Peróxido de Hidrógeno/metabolismo , Humanos , Masculino , Ratas Sprague-Dawley , Tendinopatía/metabolismo , Tendinopatía/patología , Células Cultivadas
18.
Angew Chem Int Ed Engl ; 63(39): e202409763, 2024 Sep 23.
Artículo en Inglés | MEDLINE | ID: mdl-38954763

RESUMEN

Developing non-platinum group metal catalysts for the sluggish hydrogen oxidation reaction (HOR) is critical for alkaline fuel cells. To date, Ni-based materials are the most promising candidates but still suffer from insufficient performance. Herein, we report an unconventional hcp/fcc Ni (u-hcp/fcc Ni) heteronanocrystal with multiple epitaxial hcp/fcc heterointerfaces and coherent twin boundaries, generating rugged surfaces with plenty of asymmetric convex sites. Systematic analyses discover that such convex sites enable the adsorption of *H in unusual bridge positions with weakened binding energy, circumventing the over-strong *H adsorption on traditional hollow positions, and simultaneously stabilizing interfacial *H2O. It thus synergistically optimizes the HOR thermodynamic process as well as reduces the kinetic barrier of the rate-determining Volmer step. Consequently, the developed u-hcp/fcc Ni exhibits the top-rank alkaline HOR activity with a mass activity of 40.6 mA mgNi -1 (6.3 times higher than fcc Ni control) together with superior stability and high CO-tolerance. These results provide a paradigm for designing high-performance catalysts by shifting the adsorption state of intermediates through configuring surface sites.

19.
Lab Chip ; 24(15): 3718-3727, 2024 07 23.
Artículo en Inglés | MEDLINE | ID: mdl-38953554

RESUMEN

The in vitro recapitulation of tumor microenvironment is of great interest to preclinical screening of drugs. Compared with culture of cell lines, tumor organ slices can better preserve the complex tumor architecture and phenotypic activity of native cells, but are limited by their exposure to fluid shear and gradual degradation under perfusion culture. Here, we established a decellularized liver matrix (DLM)-GelMA "sandwich" structure and a perfusion-based microfluidic platform to support long-term culture of tumor slices with excellent structural integrity and cell viability over 7 days. The DLM-GelMA was able to secrete cytokines and growth factors while providing shear protection to the tumor slice via the sandwich structure, leading to the preservation of the tumor microenvironment where immune cells (CD3, CD8, CD68), tumor-associated fibroblasts (α-SMA), and extracellular matrix components (collagen I, fibronectin) were well maintained. Furthermore, this chip presented anti-tumor efficacy at cisplatin (20 µM) on tumor patients, demonstrating our platform's efficacy to design patient-specific treatment regimens. Taken together, the successful development of this DLM-GelMA sandwich structure on the chip could faithfully reflect the tumor microenvironment and immune response, accelerating the screening process of drug molecules and providing insights for practical medicine.


Asunto(s)
Dispositivos Laboratorio en un Chip , Microambiente Tumoral , Humanos , Microambiente Tumoral/efectos de los fármacos , Antineoplásicos/farmacología , Antineoplásicos/química , Cisplatino/farmacología , Cisplatino/química , Ensayos de Selección de Medicamentos Antitumorales/instrumentación , Animales , Hígado/metabolismo , Hígado/patología , Línea Celular Tumoral , Matriz Extracelular/metabolismo
20.
Yi Chuan ; 46(7): 581-586, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39016091

RESUMEN

Biodiversity losses along with the exponential growth of global human population and human-provoked over-exploitation of natural resources. Genetic factors played an important role in the conservation of endangered species. Conservation genetics is a cross-field disciplinary of genetics and conservation biology. The course of conservation genetics is not available in colleges and universities, and the course of genetics does not directly reflect the content of biological conservation. We have taught genetics with integrative thoughts of conservation biology. In the form of case studies, we have integrated recent advances of research and technology in the relevant fields into the genetics classroom. As a result, we improved the undergraduates' motivation and interest in active learning, provoked the mutual promotion of "basic knowledge of genetics, awareness of ecological protection, and cultivate interdisciplinary thinking", and set up the groundwork for cultivating interdisciplinary talents who not only master solid basic knowledge, but also have the concept of ecological civilization.


Asunto(s)
Conservación de los Recursos Naturales , Genética , Conservación de los Recursos Naturales/métodos , Humanos , Genética/educación , Enseñanza , Biología/educación
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