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1.
Plant Cell Physiol ; 64(10): 1146-1158, 2023 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-37540575

RESUMO

Auxin plays an essential role in modulating leaf development. However, its role in leaf development in rice (Oryza sativa L.) remains largely unknown. In this study, we found that PINOID (OsPID) and two Sister-of-PIN1s, termed PIN-FORMED1c (OsPIN1c) and OsPIN1d, are necessary for rice leaf development. The ospin1c ospin1d null mutant lines presented severe defects in leaf morphogenesis, including drooping and semi-drooping blades, an abnormally thickened sheath and lamina joint, and fused leaves with absent ligules and auricles. Loss-of-function ospid mutants displayed generally similar leaf morphology but lacked leaf fusion. Interestingly, misshaped leaf genesis displayed a preference for being ipsilateral. In addition, OsPIN1c and OsPID were commonly localized in the initiating leaf primordia. Furthermore, accompanied by the more severe organ morphogenesis in the ospin1c ospin1d ospid triple mutant, RNA sequencing analysis revealed that many genes essential for leaf development have an altered expression level. Together, this study furthers our understanding of the role auxin transport plays during leaf development in monocot rice.


Assuntos
Oryza , Proteínas de Plantas , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Oryza/metabolismo , Folhas de Planta/genética , Folhas de Planta/metabolismo , Ácidos Indolacéticos/metabolismo , Morfogênese/genética
2.
Plant J ; 106(1): 41-55, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33368800

RESUMO

The CUP-SHAPED COTYLEDON (CUC) genes (CUC1, CUC2 and CUC3) regulate organ boundary formation in Arabidopsis. However, the functions of their homologous genes in rice (Oryza sativa) are still unknown. Here, we have identified an orthologous gene of CUC1 and CUC2 in rice, named OsNAM. Subcellular localization and yeast two-hybrid assay results have suggested that OsNAM encodes a conserved nuclear NAC (NAM/ATAF1/CUC2) protein with a transcriptional activator. The null mutant osnam-1 presented a fused leaf structure, small panicles, reduced branches and aberrant floral organ identities when compared with those of the wild type. Beta-glucuronidase staining and GFP reporter lines indicated that OsNAM was expressed in young tissues and that its boundary enrichment expression was regulated by OsmiR164. Loss-of-function mutants for OsCUC3 resulted in no obvious defects throughout rice development. The osnam oscuc3 double mutant, however, resulted in severe leaf fusion of the first two leaves, while the osnam single mutant showed a similar phenotype from the seventh leaf. These results indicated that OsNAM and OsCUC3 act redundantly for boundary specification during post-embryonic development. Overall, we describe the biological functions of OsNAM and OsCUC3 in rice development and the expression characteristics of OsNAM. This work reveals the important role of CUC genes in rice.


Assuntos
Arabidopsis/fisiologia , Oryza/fisiologia , Arabidopsis/genética , Arabidopsis/metabolismo , Proteínas de Arabidopsis/genética , Proteínas de Arabidopsis/metabolismo , Regulação da Expressão Gênica de Plantas/genética , Regulação da Expressão Gênica de Plantas/fisiologia , Meristema/genética , Meristema/metabolismo , Meristema/fisiologia , Oryza/genética , Oryza/metabolismo , Folhas de Planta/genética , Folhas de Planta/metabolismo , Folhas de Planta/fisiologia , Plantas Geneticamente Modificadas/genética , Plantas Geneticamente Modificadas/metabolismo , Plantas Geneticamente Modificadas/fisiologia , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo
3.
Artigo em Inglês | MEDLINE | ID: mdl-34536567

RESUMO

The sesquiterpenoid methyl farnesoate (MF), a de-epoxide form of insect juvenile hormone III (JH III), plays an essential role in regulating many crucial physiological processes in crustaceans including vitellogenesis and reproduction. 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGR) is an important rate-limiting enzyme in the mevalonate pathway, which is critical for the synthesis of JH III and MF. In the present study, a full-length cDNA encoding HMGR (EsHMGR) in Eriocheir sinensis was isolated and characterised. Sequence analysis of EsHMGR revealed that it belongs to Class I HMGR family proteins with HMG-CoA-binding and NADPH-binding domains, both important for HMGR activity. In addition to its ubiquitous tissue expression, expression of EsHMGR was highly specific to the ovary, the main site of Vg synthesis. During ovarian development, EsHMGR expression in ovary displayed a stage-specific pattern, and was correlated with expression of vitellogenin (EsVg) in hepatopancreas, which suggests that EsHMGR possibly involved in vitellogenesis. To further investigate the functional role of EsHMGR in vitellogenin biosynthesis in E. sinensis, RNA interference-mediated gene silencing was carried out both in vitro and in vivo. Quantitative PCR results showed that injection of EsHMGR double-stranded RNA (dsRNA) led to a significant decrease in EsVg expression levels in ovary and hepatopancreas both in vitro and in vivo. Taken together, the results suggest that EsHMGR is involved in vitellogenin biosynthesis in female E. sinensis, which may provide a new resource for HMGR enzymes participating in reproduction in crustaceans.


Assuntos
Braquiúros/genética , Hidroximetilglutaril-CoA Redutases/genética , Vitelogênese/genética , Sequência de Aminoácidos , Animais , Sequência de Bases , Braquiúros/metabolismo , Clonagem Molecular , DNA Complementar/genética , Feminino , Perfilação da Expressão Gênica , Hepatopâncreas/metabolismo , Hidroximetilglutaril-CoA Redutases/metabolismo , Ovário/metabolismo , Filogenia , Interferência de RNA , Homologia de Sequência de Aminoácidos , Distribuição Tecidual , Vitelogeninas/biossíntese , Vitelogeninas/genética
4.
Cancer Sci ; 112(11): 4490-4500, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-34537997

RESUMO

Various cancer vaccines have been developed to generate and amplify antigen-specific T cell responses against malignancy. Among them, in situ vaccination is one of the most practical types as it can trigger immune responses without previous antigen identification. Here we reported a novel in situ vaccine by intratumoral injection of imiquimod and OX40 agonist. In mice bearing hepatic carcinoma, both the injected tumor and the noninjected tumor in the distant lesion of the same mice were suppressed after vaccination. Further studies found that this in situ vaccine triggered systemic tumor-specific responses, with one-fold increase of effector memory T cells properties and stronger toxicity of lymphocytes in spleen. Besides, we found that imiquimod upregulated the expression of OX40 on CD4+ T cells and thus enhanced the effectiveness of OX40 agonist. Five immune-positive-related pathways were activated after vaccination. This in situ vaccine caused little harm to normal organs and provided long-term protection against the same syngeneic tumor rechallenge. Due to its effectiveness, feasibility and safety, this strategy could potentially be applied to various types of late-stage solid tumors and worthy of further clinical research.


Assuntos
Antineoplásicos/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Vacinas Anticâncer/uso terapêutico , Imiquimode/uso terapêutico , Neoplasias Hepáticas/tratamento farmacológico , Receptores OX40/agonistas , Animais , Antineoplásicos/administração & dosagem , Antineoplásicos/efeitos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Linfócitos T CD4-Positivos/efeitos dos fármacos , Linfócitos T CD4-Positivos/metabolismo , Vacinas Anticâncer/administração & dosagem , Vacinas Anticâncer/efeitos adversos , Feminino , Imiquimode/administração & dosagem , Imiquimode/efeitos adversos , Memória Imunológica/efeitos dos fármacos , Imunoterapia , Injeções Intralesionais/métodos , Neoplasias Hepáticas/imunologia , Glicoproteínas de Membrana/metabolismo , Camundongos , Receptores OX40/metabolismo , Linfócitos T/efeitos dos fármacos , Receptor 7 Toll-Like/metabolismo , Microambiente Tumoral/efeitos dos fármacos , Microambiente Tumoral/imunologia , Vacinação/métodos
5.
Small ; 17(6): e2006882, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33470524

RESUMO

The inherent features of covalent organic frameworks (COFs) make them highly attractive for uranium recovery applications. A key aspect yet to be explored is how to improve the selectivity and efficiency of COFs for recovering uranium from seawater. To achieve this goal, a series of robust and hydrophilic benzoxazole-based COFs is developed (denoted as Tp-DBD, Bd-DBD, and Hb-DBD) as efficient adsorbents for photo-enhanced targeted uranium recovery. Benefiting from the hydroxyl groups and the formation of benzoxazole rings, the hydrophilic Tp-DBD shows outstanding stability and chemical reduction properties. Meanwhile, the synergistic effect of the hydroxyl groups and the benzoxazole rings in the π-conjugated frameworks significantly decrease the optical band gap, and improve the affinity and capacity to uranium recovery. In seawater, the adsorption capacity of uranium is 19.2× that of vanadium, a main interfering metal in uranium extraction.

6.
Pharmacol Res ; 152: 104623, 2020 02.
Artigo em Inglês | MEDLINE | ID: mdl-31899315

RESUMO

Gastric cancer remains the second most common tumor in China. Modified-Bu-zhong-yi-qi decoction (mBYD) as an adjuvant therapy for gastric cancer patients after chemotherapy could significantly prolong the survival time of patients. However, the potential anticancer mechanism for mBYD has not been well characterized. Here, we conducted a comprehensive study of mBYD on a gastric cancer xenograft model with MFC cells in 615 mice and patients. Our results showed that the survival times of the 5-FU + mBYD and mBYD groups were significantly longer than that of the control group. Moreover, the 5-FU + mBYD group had a longer survival time than the 5-FU group. Flow cytometry revealed that the value of CD4+/CD8+ in the mBYD group increased and that the proportions of CD8+PD-1+ T cells and PD-1+Treg cells were decreased when compared to the control group. Compared with the 5-FU group, CD8+PD-1+ T cells and Treg cells were both decreased when 5-FU was combined with mBYD. Further analysis showed that mBYD inhibited PD-L1 expression by the PI3K/AKT pathway in gastric cancer. An in vitro study also showed that mBYD directly promoted the proliferation, activation and cytotoxicity of T lymphocytes. Meanwhile, mBYD reduced the upregulation of CD8+PD-1+ T cells induced by chemotherapy in patients with gastric cancer. In conclusion, mBYD could modulate peripheral immunity and suppress the immune escape of tumors, which may be a promising therapy for gastric cancer.


Assuntos
Adenocarcinoma/tratamento farmacológico , Antineoplásicos/uso terapêutico , Medicamentos de Ervas Chinesas/uso terapêutico , Fluoruracila/uso terapêutico , Neoplasias Gástricas/tratamento farmacológico , Adenocarcinoma/imunologia , Adulto , Idoso , Animais , Antineoplásicos/farmacologia , Antígeno B7-H1/imunologia , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Combinação de Medicamentos , Sinergismo Farmacológico , Medicamentos de Ervas Chinesas/farmacologia , Feminino , Fluoruracila/farmacologia , Humanos , Imunização , Masculino , Camundongos , Pessoa de Meia-Idade , Receptor de Morte Celular Programada 1/imunologia , Neoplasias Gástricas/imunologia , Linfócitos T/efeitos dos fármacos , Linfócitos T/imunologia
7.
Angew Chem Int Ed Engl ; 59(40): 17684-17690, 2020 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-32583543

RESUMO

Uranium is a key resource for the development of the nuclear industry, and extracting uranium from the natural seawater is one of the most promising ways to address the shortage of uranium resources. Herein, a semiconducting covalent organic framework (named NDA-TN-AO) with excellent photocatalytic and photoelectric activities was synthesized. The excellent photocatalytic effect endowed NDA-TN-AO with a high anti-biofouling activity by generating biotoxic reactive oxygen species and promoting photoelectrons to reduce the adsorbed UVI to insoluble UIV , thereby increasing the uranium extraction capacity. Owing to the photoinduced effect, the adsorption capacity of NDA-TN-AO to uranium in seawater reaches 6.07 mg g-1 , which is 1.33 times of that in dark. The NDA-TN-AO with enhanced adsorption capacity is a promising material for extracting uranium from the natural seawater.

8.
MedComm (2020) ; 5(7): e618, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38974711

RESUMO

T-cell receptor (TCR) engineered T-cell therapy, unlike chimeric antigen receptor T-cell therapy, relies on the inherent ability of TCRs to detect a wider variety of antigenic epitopes, such as protein fragments found internally or externally on cells. Hence, TCR-T-cell therapy offers broader possibilities for treating solid tumors. However, because of the complicated process of identifying specific antigenic peptides, their clinical application still encounters significant challenges. Thus, we aimed to establish a novel "universal" TCR-T "artificial antigen expression" technique that involves the delivery of the antigen to tumor cells using DSPE-PEG-NY-ESO-1157-165 liposomes (NY-ESO-1 Lips) to express TCR-T-cell-specific recognition targets. In vitro as well as in vivo studies revealed that they could accumulate efficiently in the tumor area and deliver target antigens to activate the tumor-specific cytotoxic T-cell immune response. NY-ESO-1 TCR-T therapy, when used in combination, dramatically curbed tumor progression and extended the longevity of mice. Additionally, PD-1 blockage enhanced the therapeutic effect of the aforementioned therapy. In conclusion, NY-ESO-1 Lips "cursed" tumor cells by enabling antigenic target expression on their surface. This innovative technique presents a groundbreaking approach for the widespread utilization of TCR-T in solid tumor treatment.

9.
bioRxiv ; 2024 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-38328151

RESUMO

We report for the first time an anticancer benefit of tirzepatide-a dual glucagon-like peptide 1 and glucose-dependent insulinotropic polypeptide receptor agonist-in a model of obesity and breast cancer in female mice. Long-term tirzepatide treatment induced weight loss, mitigated obesity-driven changes in circulating metabolic hormone levels, and suppressed orthotopic E0771 mammary tumor growth. Relative to tirzepatide, chronic calorie restriction, an established anticancer intervention in preclinical models, promoted even greater weight loss, systemic hormonal regulation, and tumor suppression. We conclude that tirzepatide represents a promising pharmacologic approach for mitigating the procancer effects of obesity. Moreover, strategies promoting greater weight loss than achieved with tirzepatide alone may augment the anticancer benefits of tirzepatide.

10.
Front Cell Dev Biol ; 11: 1052942, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36875764

RESUMO

Gastric cancer (GC) is a potential dominant disease in tumor immunotherapy checkpoint inhibitors, and adoptive cell therapy have brought great hope to GC patients. However, only some patients with GC can benefit from immunotherapy, and some patients develop drug resistance. More and more studies have shown that long non-coding RNAs (lncRNAs) may be important in GC immunotherapy's prognosis and drug resistance. Here, we summarize the differential expression of lncRNAs in GC and their impact on the curative effect of GC immunotherapy, discuss potential mechanisms of activity in GC immunotherapy resistance regulated by lncRNAs. This paper reviews the differential expression of lncRNA in GC and its effect on immunotherapy efficacy in GC. In terms of genomic stability, inhibitory immune checkpoint molecular expression, the cross-talk between lncRNA and immune-related characteristics of GC was summarized, including tumor mutation burden (TMB), microsatellite instability (MSI), and Programmed death 1 (PD-1). At the same time, this paper reviewed the mechanism of tumor-induced antigen presentation and upregulation of immunosuppressive factors, as well as the association between Fas system and lncRNA, immune microenvironment (TIME) and lncRNA, and summarized the functional role of lncRNA in tumor immune evasion and immunotherapy resistance.

11.
Nanoscale ; 15(37): 15344-15351, 2023 Sep 29.
Artigo em Inglês | MEDLINE | ID: mdl-37698246

RESUMO

2D-material-based van der Waals heterostructures (vdWhs) have shown great potential in next-generation multi-functional microelectronic devices. Thanks to their sharp interface and ultrathin thickness, 2D p-n junctions with high rectification properties have been established by combining p-type monochalcogenides with n-type transition metal dichalcogenides. However, the anisotropic rectification together with the charge transfer and gate effect has not been clarified. Herein, the electrical anisotropy of p-SnS/n-MoS2 diodes was studied. Optimum ideality factors within 1.08-1.18 have been achieved for the diode with 6.6 nm thick SnS on monolayer MoS2, and a high rectification ratio of 3.1 × 104 with strong in-plane anisotropy is observed along the zigzag direction of SnS. A strong gate effect on the anisotropic series resistance has been verified and an effective tuning over the transport length of the SnS channel can be established through adjustment of the current orientation and gate voltage. A thickness-dependent minority carrier transport mechanism has also been demonstrated for the reverse drain current, and Fowler-Nordheim tunneling and direct tunneling are proposed for the increase of the reverse current of the thicker and thinner diodes, respectively. This work will provide another strategy for high-performance diodes based on vdWhs via the control of the current orientation and the gate effect.

12.
Bioeng Transl Med ; 8(6): e10585, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-38023696

RESUMO

T cell receptor-engineered T (TCR-T) cell therapy has demonstrated therapeutic effects in basic research and clinical trials for treating solid tumors. Due to the peptide-dependent recognition and the human leukocyte antigen (HLA)-restriction, TCR-T cell therapy is generally custom designed to target individual antigens. The lack of suitable universal targets for tumor cells significantly limits its clinical applications. Establishing a universal TCR-T treatment strategy is of great significance. This study designed and evaluated the HLA-peptide-addressing universal (HAUL) TCR-T cell therapy based on HLA-peptide (pHLA) loaded membrance fusogenic deliver system. The pHLA-NP-based tumor cell membrane modification technology can transfer the pHLA onto the surface of tumor cells through membrane fusogenic nanoparticles. Then tumor cells are recognized and killed by TCR-T cells specifically. The HAUL TCR-T cell therapy technology is a universal technology that enables tumor cells to be identified and killed by specific TCR-T cells, regardless of the HLA typing of tumor cells.

13.
Adv Sci (Weinh) ; 10(12): e2205044, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36755195

RESUMO

Chimeric antigen receptor (CAR)-T cell therapy is a transformative treatment against advanced malignancies. Unfortunately, once administrated in vivo, CAR-T cells become out of artificial control, and fierce response to CAR-T therapy may cause severe adverse events, represented by cytokine-release syndrome and on-target/off-tumor effects. Here, a nanomodified switch strategy is developed, leading to sustained and precise "on-tumor only" activation of CAR-T cells. Here, original gelatinase-responsive nanoparticles (NPs) are used to selectively deliver the heterodimerizing switch, which is the key component of switchable CAR with separated activation modules. The "NanoSwitch" is tumor-specific, thus inactivated switchable CAR-T cells do little harm to normal cells, even if the normal cells express the target of CAR-T. Owing to the sustained-release effect of NPs, the CAR-T cells are activated smoothly, avoiding sudden release of cytokine. These data introduce NanoSwitch as a universal and applicable solution to safety problems of CAR-T therapy regardless of the target.


Assuntos
Neoplasias , Receptores de Antígenos Quiméricos , Humanos , Receptores de Antígenos de Linfócitos T , Neoplasias/terapia , Citocinas , Linfócitos T
14.
PLoS One ; 17(10): e0274616, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36251640

RESUMO

Various physical information can be leaked while the encryption algorithm is running in the device. Side-channel analysis exploits these leakages to recover keys. Due to the sensitivity of deep learning to the data features, the efficiency and accuracy of side channel analysis are effectively improved with the application of deep learning algorithms. However, a considerable part of existing reserches are based on traditional neural networks. The effectiveness of key recovery is improved by increasing the size of the network. However, the computational complexity of the algorithm increases accordingly. Problems such as overfitting, low training efficiency, and low feature extraction ability also occur. In this paper, we construct an improved lightweight convolutional neural network based on the feature fusion network. The new network and the traditional neural networks are respectively applied to the side-channel analysis for comparative experiments. The results show that the new network has faster convergence, better robustness and higher accuracy. No overfitting has occurred. A heatmap visualization method was introduced for analysis. The new network has higher heat value and more concentration in the key interval. Side-channel analysis based on feature fusion network has better performance, compared with the ones based on traditional neural networks.


Assuntos
Algoritmos , Redes Neurais de Computação
15.
Cancer Lett ; 546: 215840, 2022 10 10.
Artigo em Inglês | MEDLINE | ID: mdl-35921969

RESUMO

T cell receptor-engineered T (TCR-T) cells targeting neoantigens present potential immunotherapy for solid tumors. With the continuous optimization of the entire production procedures, the manufacturing process of TCR-T cells is becoming more efficient and productive. However, clinical-scale manufacturing of TCR-T cells still encounters tremendous challenges. Here, we summarize the latest progress of neoantigen-targeted TCR-T cell therapy and focus on the technical difficulties in preparing personalized neoantigen-targeted TCR-T cells and the challenges in clinical applications. Possible approaches for improving TCR-T cell therapy are discussed as well in this review.


Assuntos
Antígenos de Neoplasias , Neoplasias , Terapia Baseada em Transplante de Células e Tecidos , Humanos , Imunoterapia , Receptores de Antígenos de Linfócitos T
16.
Se Pu ; 40(5): 469-476, 2022 May 08.
Artigo em Zh | MEDLINE | ID: mdl-35478006

RESUMO

A modified QuEChERS method, based on multi-walled carbon nanotubes (MWCNTs), was established for the detection of 10 pyrethroid pesticides (cyfluthrin, flucythrinate, fenpropathrin, bifenthrin, cyhalothrin, permethrin, cypermethrin, etofenprox, fenvalerate, deltamethrin) in tea, in combination with gas chromatography-tandem mass spectrometry (GC-MS/MS). The purification effects and dosages of four carbon nanomaterials, viz. single-walled carbon nanotubes (SWCNTs), MWCNTs, amino-modified MWCNTs, and graphene, were compared. An orthogonal experimental design was used to determine the optimal experimental conditions for sample pretreatment. The experimental factors governing the process were analyzed using variance. The results showed that the optimized sample pretreatment parameters were as follows. Acetonitrile was used as the extraction solvent with ultrasonic extraction for 35 min, while 60 mg MWCNTs, 200 mg PSA, and 200 mg C18, were used as purifiers. The effects of the extraction solvent and the carbon nanomaterials used on the recoveries of the 10 pyrethroid pesticides were significantly different (p<0.001), and the effect of extraction time on the recoveries was statistically different (p<0.05). The dosage of carbon nanomaterials had no significant effect on the recoveries (p>0.05). Good linearities were observed for the 10 pyrethroid pesticides in the concentration range of 0.01-2 mg/L. The limits of detection (LODs) and limits of quantification (LOQs) were in the ranges of 0.001-0.01 mg/kg and 0.005-0.04 mg/kg, respectively. The average recoveries of the pyrethroid pesticides spiked into blank samples of green tea were 91.4%-109.7%, and the relative standard deviations were 0.12%-9.80% (n=6). Furthermore, the matrix effects (MEs) of scented green tea, green tea, and black tea were evaluated. It was found that the addition of MWCNTs to the purifier can effectively reduce the matrix effect in green tea and black tea matrices. The developed method and the national standard method were used to detect the residues of the 10 pyrethroid pesticides in 120 tea samples available in the market. The results showed that cyfluthrin, deltamethrin, fenvalerate, permethrin, fenpropathrin, cypermethrin, bifenthrin and cyhalothrin were detected, and the contents obtained with the two methods were similar. Although pyrethroids were detected in most tea samples, the contents of all pesticide residues were below the maximum residue limits (MRLs). Therefore, the developed method is suitable for the rapid quantitative analysis of pesticide residues in tea.


Assuntos
Nanotubos de Carbono , Resíduos de Praguicidas , Praguicidas , Piretrinas , Cromatografia Gasosa-Espectrometria de Massas/métodos , Nanotubos de Carbono/análise , Nanotubos de Carbono/química , Permetrina/análise , Resíduos de Praguicidas/análise , Praguicidas/análise , Piretrinas/análise , Projetos de Pesquisa , Solventes/análise , Espectrometria de Massas em Tandem , Chá/química
17.
Front Pharmacol ; 13: 939555, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35837274

RESUMO

Ion channels are expressed in almost all living cells, controlling the in-and-out communications, making them ideal drug targets, especially for central nervous system diseases. However, owing to their dynamic nature and the presence of a membrane environment, ion channels remain difficult targets for the past decades. Recent advancement in cryo-electron microscopy and computational methods has shed light on this issue. An explosion in high-resolution ion channel structures paved way for structure-based rational drug design and the state-of-the-art simulation and machine learning techniques dramatically improved the efficiency and effectiveness of computer-aided drug design. Here we present an overview of how simulation and machine learning-based methods fundamentally changed the ion channel-related drug design at different levels, as well as the emerging trends in the field.

18.
J Hematol Oncol ; 15(1): 29, 2022 03 18.
Artigo em Inglês | MEDLINE | ID: mdl-35303900

RESUMO

BACKGROUND: Chimeric antigen receptor (CAR)-T cell therapy has demonstrated remarkable success in the treatment of hematologic malignancies, while the success has not yet been replicated in solid tumors. To some extent, the disappointing results can be attributed to the paucity and heterogeneity of target antigens in solid tumors since adequate antigens are the cornerstone for CAR-T cells to recognize and attack tumor cells. METHODS: We established a target-redirected universal CAR-T (TRUE CAR-T) cell therapeutic modality, in which exogenous antigens are loaded onto fusogenic nanoparticles to achieve in situ modification of cell membrane in solid tumors, providing targets for subsequent CAR-T cell therapy. The modification effect was evaluated by flow cytometry and confocal microscopic imaging. The in vivo metabolism and biodistribution of fusogenic antigen loaded nanoparticles (F-AgNPs) was explored using near infrared living imaging. Then F-AgNPs mediated in situ antigen modification were cooperated with corresponding CAR-T cell therapy, and its antitumor efficacy was evaluated using immune function experiments and further investigated in different tumor models. RESULTS: Using F-AgNPs, exogenous antigens were selectively modified onto tumor cell membranes through membrane fusion, spread deeper into tumor tissues through intercellular lipid transfer, further activating corresponding CAR-T cells and mediating antitumor immune responses towards multiple types of tumor cells, despite of their inherent antigen profiles. The cooperative treatment of F-AgNPs and CAR-T cell therapy successfully suppressed tumor proliferation and prolonged survival in both subcutaneous and peritoneally disseminated tumor models. CONCLUSION: The fusogenic nanoparticle-based in situ antigen modification overcome the limitation of target antigens paucity and heterogeneity in solid tumors, improving the efficacy and broadening the applications of CAR-T cells, thus establishing a novel TRUE CAR-T cell therapeutic modality with universal application and translational potential in immunotherapies for solid tumors.


Assuntos
Neoplasias , Receptores de Antígenos Quiméricos , Antígenos de Neoplasias , Terapia Baseada em Transplante de Células e Tecidos , Humanos , Imunoterapia Adotiva/métodos , Receptores de Antígenos de Linfócitos T/genética , Receptores de Antígenos de Linfócitos T/metabolismo , Distribuição Tecidual , Ensaios Antitumorais Modelo de Xenoenxerto
19.
Nat Commun ; 13(1): 7466, 2022 12 03.
Artigo em Inglês | MEDLINE | ID: mdl-36463242

RESUMO

In situ vaccination is a promising strategy to convert the immunosuppressive tumor microenvironment into an immunostimulatory one with limited systemic exposure and side effect. However, sustained clinical benefits require long-term and multidimensional immune activation including innate and adaptive immunity. Here, we develop a probiotic food-grade Lactococcus lactis-based in situ vaccination (FOLactis) expressing a fusion protein of Fms-like tyrosine kinase 3 ligand and co-stimulator OX40 ligand. Intratumoural delivery of FOLactis contributes to local retention and sustained release of therapeutics to thoroughly modulate key components of the antitumour immune response, such as activation of natural killer cells, cytotoxic T lymphocytes, and conventional-type-1-dendritic cells in the tumors and tumor-draining lymph nodes. In addition, intratumoural administration of FOLactis induces a more robust tumor antigen-specific immune response and superior systemic antitumour efficacy in multiple poorly immune cell-infiltrated and anti-PD1-resistant tumors. Specific depletion of different immune cells reveals that CD8+ T and natural killer cells are crucial to the in situ vaccine-elicited tumor regression. Our results confirm that FOLactis displays an enhanced antitumour immunity and successfully converts the 'cold' tumors to 'hot' tumors.


Assuntos
Carcinoma in Situ , Lactococcus lactis , Humanos , Ligante OX40 , Lactococcus lactis/genética , Imunoterapia , Fatores Imunológicos , Vacinação , Microambiente Tumoral
20.
Anim Reprod Sci ; 224: 106653, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33249353

RESUMO

Methyl farnesoate (MF), a de-epoxidized form of juvenile hormone (JH) Ⅲ in insects, may regulate developmental processes such as reproduction and ovarian maturation in crustaceans. Krüppel homolog 1 (Kr-h1) is a target response gene for the methoprene-tolerant (Met) protein that is a component of the JH signaling pathway in insects. In the present study, Es-Kr-h1 was cloned from E. sinensis and characterized to ascertain whether JH/MF signaling in insects is conserved in crustaceans. The findings with molecular structure analysis indicated Es-Kr-h1 contains seven zinc finger motifs (Zn2-Zn8) commonly conserved in other crustaceans, but the Zn1 motif was not detected to be present. The PCR results indicated that relative abundance of Es-Kr-h1 mRNA transcript in the hepatopancreas was greatest in the Stage Ⅱ, followed by the Stage Ⅳ ovarian developmental categories. The relative abundance of Es-Kr-h1 mRNA transcript in vitro was greater after MF addition to the hepatopancreas, however, not the ovarian tissues. The results from in vivo and eyestalk ablation experiments indicated the relative abundance of Es-Kr-h1 mRNA transcript was greater after MF treatment and bilateral eyestalk removal in the hepatopancreas, however, not ovarian tissues. Notably, there were effects of MF on relative abundance of Es-Kr-h1 mRNA transcript pattern. The Es-Kr-h1 protein, therefore, may be involved in MF-mediated vitellogenesis resulting from the response to Es-Met in E. sinensis, and the JH/MF signaling pathway is potentially conserved in crustaceans.


Assuntos
Braquiúros/efeitos dos fármacos , Ácidos Graxos Insaturados/farmacologia , Fatores de Transcrição Kruppel-Like/metabolismo , Vitelogênese/efeitos dos fármacos , Animais , Braquiúros/fisiologia , Regulação da Expressão Gênica/efeitos dos fármacos , Hormônios Juvenis/genética , Hormônios Juvenis/metabolismo , Fatores de Transcrição Kruppel-Like/genética , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/fisiologia
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