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1.
Langmuir ; 2024 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-38632903

RESUMO

We prepared BiOCl, BiO(ClBr), BiO(ClBrI), and BiO[ClBrI(CO3)0.5] materials using a simple coprecipitation method. It was found that adjusting the number of anions in the anion layer was conducive to adjusting the band structure of BiOX and could effectively promote the migration and separation of photogenerated carriers, thus improving the photocatalytic activity. We first selected methyl orange (MO) as the study pollutant and compared it with BiOCl, BiO(ClBr), and BiO(ClBrI). The first-order kinetic constants of MO degradation by BiO[ClBrI(CO3)0.5] increased by 90.3, 33.9, and 3.1 times, respectively. The photocatalytic degradation rate of methylene blue by BiO[ClBrI(CO3)0.5] was 89.5%, indicating the excellent photocatalytic performance of BiO[ClBrI(CO3)0.5]. The stability of BiO[ClBrI(CO3)0.5] was demonstrated through cyclic experiments and XRD analysis before and after the reaction. The photocatalytic degradation of MO by BiO[ClBrI(CO3)0.5] showed that h+ and 1O2 were the main active oxidizing species and •O2- was the secondary active substance. Overall, our work provides new ideas for the synthesis and degradation of organic pollutants by using two-dimensional anionic high-entropy materials.

2.
Medicine (Baltimore) ; 103(15): e37744, 2024 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-38608118

RESUMO

RATIONALE: This report presents a unique case of a patient diagnosed with Primary Sjögren's syndrome and a relatively rare traditional Chinese medicine pattern, known as the combined cold and heat pattern and cold-dampness syndrome. The patient's condition was successfully managed using Chinese herbal medicine, specifically the modified Da-Chai-Hu decoction and Linggui Zhugan decoction. PATIENT CONCERNS: A 56-year-old woman had chronic dry eye and mouth for over 10 years. She was initially managed with traditional Chinese herbal medicine (TCHM) prescriptions, including the Zengye decoction, but the therapeutic effects were unsatisfactory. As the disease progressed, she was diagnosed with an anxiety disorder due to symptoms of vexation and insomnia. Treatment with alprazolam and venlafaxine failed to alleviate these symptoms. Recently, her general condition gradually worsened, with symptoms including a bitter taste in her mouth, dizziness, hot flashes, chills, poor appetite, chest discomfort, and constipation. DIAGNOSES: After a series of examinations, including a Schirmer test and labial gland biopsy, she was diagnosed with Sjögren's syndrome. INTERVENTIONS: Despite regular treatment with pilocarpine, sodium hyaluronate eye drops, venlafaxine, and alprazolam, the dry mouth symptoms intensified. Consequently, she sought further intervention through the TCHM. OUTCOMES: After 8 weeks of treatment with the modified Da-Chai-Hu decoction and Linggui Zhugan decoction, she reported a significant improvement in her dryness-related symptoms and sleep quality. LESSONS: This case report demonstrates that TCHM can effectively treat Primary Sjögren's syndrome, and should be considered for broader applications. Furthermore, this underscores the importance of tailoring treatment formulas to patients by identifying their specific syndrome differentiation in a clinical setting.


Assuntos
Medicamentos de Ervas Chinesas , Síndrome de Sjogren , Humanos , Feminino , Pessoa de Meia-Idade , Alprazolam , Medicamentos de Ervas Chinesas/uso terapêutico , Medicina Tradicional Chinesa , Síndrome de Sjogren/complicações , Síndrome de Sjogren/diagnóstico , Síndrome de Sjogren/tratamento farmacológico , Cloridrato de Venlafaxina
3.
Nat Commun ; 15(1): 2901, 2024 Apr 04.
Artigo em Inglês | MEDLINE | ID: mdl-38575571

RESUMO

Simultaneous multi-target detection and multi-site gene editing are two key factors restricting the development of disease diagnostic and treatment technologies. Despite numerous explorations on the source, classification, functional features, crystal structure, applications and engineering of CRISPR-Cas13a, all reports use the contiguous target RNA activation paradigm that only enables single-target detection in vitro and one-site gene editing in vivo. Here we propose a noncontiguous target RNA activation paradigm of Cas13a and establish a CRISPR-Cas13a Gemini System composed of two Cas13a:crRNA binary complexes, which can provide rapid, simultaneous, highly specific and sensitive detection of two RNAs in a single readout, as well as parallel dual transgene knockdown. CRISPR-Cas13a Gemini System are demonstrated in the detection of two miRNAs (miR-155 and miR-375) for breast cancer diagnosis and two small RNAs (EBER-1 and EBER-2) for Epstein-Barr virus diagnosis using multiple diagnostic platforms, including fluorescence and colorimetric-based lateral flow systems. We also show that CRISPR-Cas13a Gemini System can knockdown two foreign genes (EGFP and mCherry transcripts) in mammalian cells simultaneously. These findings suggest the potential of highly effective and simultaneous detection of multiple biomarkers and gene editing of multiple sites.


Assuntos
Infecções por Vírus Epstein-Barr , MicroRNAs , Animais , Humanos , RNA/genética , Repetições Palindrômicas Curtas Agrupadas e Regularmente Espaçadas/genética , Sistemas CRISPR-Cas/genética , Infecções por Vírus Epstein-Barr/genética , Herpesvirus Humano 4/genética , Mamíferos/genética
4.
Int J Nanomedicine ; 19: 1749-1766, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38414527

RESUMO

Purpose: Triple-negative breast cancer (TNBC) is the most lethal subtype of breast cancer. However, the effect of current treatment strategies by inducing tumor cell apoptosis alone is not satisfactory. The growth, metastasis and treatment sensitivity of tumors can be strongly influenced by cancer-associated fibroblasts (CAFs) in the microenvironment. Effective cancer therapies may need to target not only the tumor cells directly but also the CAFs that protect them. Methods: Celastrol and small-sized micelles containing betulinic acid were co-encapsulated into liposomes using the thin-film hydration method (CL@BM). Folic acid was further introduced to modify liposomes as the targeting moiety (F/CL@BM). We established a novel NIH3T3+4T1 co-culture model to mimic the tumor microenvironment and assessed the nanocarrier's inhibitory effects on CAFs-induced drug resistance and migration in the co-culture model. The in vivo biological distribution, fluorescence imaging, biological safety evaluation, and combined therapeutic effect evaluation of the nanocarrier were carried out based on a triple-negative breast cancer model. Results: In the present study, a novel multifunctional nano-formulation was designed by combining the advantages of sequential release, co-loading of tretinoin and betulinic acid, and folic acid-mediated active targeting. As expected, the nano-formulation exhibited enhanced cytotoxicity in different cellular models and effectively increased drug accumulation at the tumor site by disrupting the cellular barrier composed of CAFs by tretinoin. Notably, the co-loaded nano-formulations proved to be more potent in inhibiting tumor growth in mice and also showed better anti-metastatic effects in lung metastasis models compared to the formulations with either drug alone. This novel drug delivery system has the potential to be used to develop more effective cancer therapies. Conclusion: Targeting CAFs with celastrol sensitizes tumor cells to chemotherapy, increasing the efficacy of betulinic acid. The combination of drugs targeting tumor cells and CAFs may lead to more effective therapies against various cancers.


Assuntos
Fibroblastos Associados a Câncer , Triterpenos Pentacíclicos , Neoplasias de Mama Triplo Negativas , Humanos , Animais , Camundongos , Lipossomos/farmacologia , Neoplasias de Mama Triplo Negativas/tratamento farmacológico , Neoplasias de Mama Triplo Negativas/patologia , Células NIH 3T3 , Ácido Betulínico , Tretinoína/farmacologia , Ácido Fólico/farmacologia , Linhagem Celular Tumoral , Microambiente Tumoral
5.
Eur J Obstet Gynecol Reprod Biol ; 295: 86-91, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38340595

RESUMO

PURPOSE: Endometrial polyps (EPs) are common gynecological disorders for which no clear etiology has been found. ADAMTS have been associated with a variety of diseases. This study aimed to investigate the potential correlation between serologic levels of ADAMTS 5, 9, and 12 in patients with EPs. METHODS: A total of 88 patients were categorized into two groups: the EPs group, consisting of recurrent EPs and first occurrence EPs, and a control group. The study compared the general information and serum levels of ADAMTS 5, 9, and 12 between the groups. RESULTS: Regarding the general data, a statistically significant age difference (p < 0.05) was observed, while no significant differences were found in the other variables. After considering age as a confounding factor, the previously observed statistical significance in the differences of ADAMTS5 and 9 between the groups diminished. However, it was found that the concentrations of ADAMTS12 in both the EPs group and the recurrent EPs group were significantly higher compared to the control group and the first occurrence EPs group (p < 0.05). ROC curves were generated to determine the critical values of ADAMTS12 for predicting EPs and recurrent EPs, which were found to be 0.6962 ng/ml (sensitivity: 100 %, specificity: 39.5 %) and 0.8768 ng/ml (sensitivity: 75.0 %, specificity: 76.3 %), respectively. CONCLUSION: Our findings revealed elevated serologic levels of ADAMTS12 in the EPs group, particularly in the recurrent EPs group. Furthermore, ADAMTS-12 was identified as a valuable biomarker for assisting in the diagnosis and prediction of EPs recurrence.


Assuntos
Doenças dos Genitais Femininos , Pólipos , Feminino , Humanos , Pólipos/diagnóstico , Pólipos/complicações , Metaloendopeptidases
6.
bioRxiv ; 2024 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-38260379

RESUMO

Dihydroceramide desaturases convert dihydroceramides to ceramides, the precursors of all complex sphingolipids. Reduction of DEGS1 dihydroceramide desaturase function causes pediatric neurodegenerative disorder hypomyelinating leukodystrophy-18 (HLD-18). We discovered that infertile crescent (ifc), the Drosophila DEGS1 homolog, is expressed primarily in glial cells to promote CNS development by guarding against neurodegeneration. Loss of ifc causes massive dihydroceramide accumulation and severe morphological defects in cortex glia, including endoplasmic reticulum (ER) expansion, failure of neuronal ensheathment, and lipid droplet depletion. RNAi knockdown of the upstream ceramide synthase schlank in glia of ifc mutants rescues ER expansion, suggesting dihydroceramide accumulation in the ER drives this phenotype. RNAi knockdown of ifc in glia but not neurons drives neuronal cell death, suggesting that ifc function in glia promotes neuronal survival. Our work identifies glia as the primary site of disease progression in HLD-18 and may inform on juvenile forms of ALS, which also feature elevated dihydroceramide levels.

7.
Plant Physiol ; 194(3): 1906-1922, 2024 Feb 29.
Artigo em Inglês | MEDLINE | ID: mdl-37987562

RESUMO

Salinity is a severe abiotic stress that limits plant survival, growth, and development. 14-3-3 proteins are phosphopeptide-binding proteins that are involved in numerous signaling pathways, such as metabolism, development, and stress responses. However, their roles in salt tolerance are unclear in woody plants. Here, we characterized an apple (Malus domestica) 14-3-3 gene, GENERAL REGULATORY FACTOR 8 (MdGRF8), the product of which promotes salinity tolerance. MdGRF8 overexpression improved salt tolerance in apple plants, whereas MdGRF8-RNA interference (RNAi) weakened it. Yeast 2-hybrid, bimolecular fluorescence complementation, pull-down, and coimmunoprecipitation assays revealed that MdGRF8 interacts with the transcription factor MdWRKY18. As with MdGRF8, overexpressing MdWRKY18 enhanced salt tolerance in apple plants, whereas silencing MdWRKY18 had the opposite effect. We also determined that MdWRKY18 binds to the promoters of the salt-related genes SALT OVERLY SENSITIVE 2 (MdSOS2) and MdSOS3. Moreover, we showed that the 14-3-3 protein MdGRF8 binds to the phosphorylated form of MdWRKY18, enhancing its stability and transcriptional activation activity. Our findings reveal a regulatory mechanism by the MdGRF8-MdWRKY18 module for promoting the salinity stress response in apple.


Assuntos
Malus , Tolerância ao Sal , Tolerância ao Sal/genética , Malus/metabolismo , Proteínas 14-3-3/genética , Proteínas 14-3-3/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Estresse Fisiológico/genética
8.
Nat Immunol ; 25(1): 102-116, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38012418

RESUMO

Chimeric antigen receptor (CAR) T cell therapies have successfully treated hematological malignancies. Macrophages have also gained attention as an immunotherapy owing to their immunomodulatory capacity and ability to infiltrate solid tumors and phagocytize tumor cells. The first-generation CD3ζ-based CAR-macrophages could phagocytose tumor cells in an antigen-dependent manner. Here we engineered induced pluripotent stem cell-derived macrophages (iMACs) with toll-like receptor 4 intracellular toll/IL-1R (TIR) domain-containing CARs resulting in a markedly enhanced antitumor effect over first-generation CAR-macrophages. Moreover, the design of a tandem CD3ζ-TIR dual signaling CAR endows iMACs with both target engulfment capacity and antigen-dependent M1 polarization and M2 resistance in a nuclear factor kappa B (NF-κB)-dependent manner, as well as the capacity to modulate the tumor microenvironment. We also outline a mechanism of tumor cell elimination by CAR-induced efferocytosis against tumor cell apoptotic bodies. Taken together, we provide a second-generation CAR-iMAC with an ability for orthogonal phagocytosis and polarization and superior antitumor functions in treating solid tumors relative to first-generation CAR-macrophages.


Assuntos
Neoplasias , Receptores de Antígenos Quiméricos , Humanos , Receptores de Antígenos de Linfócitos T , Linfócitos T , Linhagem Celular Tumoral , Receptores de Antígenos Quiméricos/genética , Imunoterapia Adotiva/métodos , Macrófagos/patologia , Microambiente Tumoral
9.
Explore (NY) ; 20(2): 256-260, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37612160

RESUMO

BACKGROUND: Adult-onset Still's disease (AOSD) is a rare yet well-documented polygenic and systemic autoinflammatory disease characterized by recurrent spiking fever, transient skin rash, arthralgia, and sore throat. Traditional Chinese medicine (TCM) holds a significant role in complementary and alternative medicine. This study presents a unique case of a female AOSD patient with concurrent Qi and fluid deficiency syndrome who received combined treatment with formulated Zhu Ye Shi Gao Decoction (ZYSGD). CASE PRESENTATION: In this case, a 28-year-old female patient presented with a 15-day history of fever and skin rash accompanied by sore throat, fatigue, myalgia, and arthralgia. Additionally, leucocytosis, aminotransferase abnormalities, and elevated inflammatory factor levels were observed. Infectious diseases, solid tumors, and hematological disorders were all ruled out. Anti-infective treatments proved ineffective, leading to the final diagnosis of AOSD. Glucocorticoid therapy provided only partial relief. Consequently, formulated ZYSGD and hepatoprotective drugs were added to the glucocorticoid treatment. Subsequently, the patient's symptoms and inflammatory biomarkers showed improvement. After discharge, the patient's condition remained stable while continuing the formulated ZYSGD in combination with 4 mg of Medrolol (qd) during a 10-month follow-up period. CONCLUSION: This case report suggests that formulated ZYSGD could be a viable option for complementary and alternative therapy for late-stage AOSD, especially in cases involving both Qi and body fluid imbalances.


Assuntos
Exantema , Faringite , Doença de Still de Início Tardio , Adulto , Humanos , Feminino , Medicina Tradicional Chinesa , Doença de Still de Início Tardio/tratamento farmacológico , Doença de Still de Início Tardio/complicações , Glucocorticoides/uso terapêutico , Qi , Exantema/complicações , Faringite/complicações , Artralgia/complicações
11.
Commun Biol ; 6(1): 1116, 2023 11 03.
Artigo em Inglês | MEDLINE | ID: mdl-37923818

RESUMO

Pathogenic mutations in mitochondrial DNA cause severe and often lethal multi-system symptoms in primary mitochondrial defects. However, effective therapies for these defects are still lacking. Strategies such as employing mitochondrially targeted restriction enzymes or programmable nucleases to shift the ratio of heteroplasmic mutations and allotopic expression of mitochondrial protein-coding genes have limitations in treating mitochondrial homoplasmic mutations, especially in non-coding genes. Here, we conduct a proof of concept study applying a screened DdCBE pair to correct the homoplasmic m.A4300G mutation in induced pluripotent stem cells derived from a patient with hypertrophic cardiomyopathy. We achieve efficient G4300A correction with limited off-target editing, and successfully restore mitochondrial function in corrected induced pluripotent stem cell clones. Our study demonstrates the feasibility of using DdCBE to treat primary mitochondrial defects caused by homoplasmic pathogenic mitochondrial DNA mutations.

12.
World J Clin Cases ; 11(28): 6902-6907, 2023 Oct 06.
Artigo em Inglês | MEDLINE | ID: mdl-37901019

RESUMO

BACKGROUND: Testicular mixed germ cell tumors (TMGCTs) are rare malignant tumors that are more common in men aged 20-40 years. TMGCTs comprise two or more types of germ cell tumors that primarily affect the testis. Their onset is undetectable; thus, early diagnosis is challenging. However, early recognition and diagnosis substantially improve patient prognosis. CASE SUMMARY: We evaluated a rare case of TMGCT in a male patient presenting with recurrent fever and left supraclavicular lymphadenectasis instead of testicular enlargement and pain, which may easily lead to misdiagnosis. We report the clinical signs and symptoms, histopathological characteristics, and immunohistochemical results of this case of malignant TMGCT. CONCLUSION: Our case, which was typical with multiple components, along with a literature review, may serve as a basis for early diagnosis.

13.
Mol Hortic ; 3(1): 7, 2023 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-37789495

RESUMO

The quantitative control of FLOWERING LOCUS T (FT) activation is important for the floral transition in flowering plants. However, the flowering regulation mechanisms in the day-neutral, summer-flowering chrysanthemum plant remain unclear. In this study, the chrysanthemum BBX7 homolog CmBBX7 was isolated and its flowering function was identified. The expression of CmBBX7 showed a diurnal rhythm and CmBBX7 exhibited higher expression levels than CmBBX8. Overexpression of CmBBX7 in transgenic chrysanthemum accelerated flowering, whereas lines transfected with a chimeric repressor (pSRDX-CmBBX7) exhibited delayed flowering. Yeast single hybridization, luciferase, electrophoretic mobility shift, and chromatin immunoprecipitation assays showed that CmBBX7 directly targets CmFTL1. In addition, we found that CmBBX7 and CmBBX8 interact to positively regulate the expression of CmFTL1 through binding to its promoter. Collectively, these results highlight CmBBX7 as a key cooperator in the BBX8-FT module to control chrysanthemum flowering.

14.
Anal Chim Acta ; 1279: 341769, 2023 Oct 23.
Artigo em Inglês | MEDLINE | ID: mdl-37827669

RESUMO

MicroRNA (miRNA) has gained significant attention as a potential biomarker for cancer clinics, and there is an urgent need for developing sensing strategies with high selectivity, sensitivity, and low background. In vitro diagnosis based on Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-Associated protein (CRISPR/Cas) technology could simplify the detection procedure, improve sensitivity and selectivity, and has broad application prospects as the next-generation molecular diagnosis technology. We propose a novel dual signal amplification strategy, called CENTER, which integrates the CRISPR/Cas12a system, an entropy-driven DNA signaling network, and strand displacement amplification to achieve ultrasensitive detection of miR-141, a potential marker for prostate cancer. The experimental results demonstrate that CENTER can distinguish single nucleotide mutations, and the strategy exhibits a good linear calibration curve ranging from 100 aM to 1 pM. Due to dual signal amplification, the detection limit is as low as 34 aM. We proposed a method for identifying miR-141 expressed in human serum and successfully distinguished between prostate cancer patients (n = 20) and healthy individuals (n = 15) with an impressive accuracy of 94%. Overall, CENTER shows great promise for the detection of miRNA.


Assuntos
Técnicas Biossensoriais , MicroRNAs , Neoplasias da Próstata , Masculino , Humanos , MicroRNAs/genética , Sistemas CRISPR-Cas , Neoplasias da Próstata/diagnóstico , Neoplasias da Próstata/genética , Calibragem , Entropia
15.
Am J Alzheimers Dis Other Demen ; 38: 15333175231206023, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37812498

RESUMO

OBJECTIVE: To investigate the incidence of delirium and its related risk factors in patients with senile dementia during hospitalization. METHODS: A retrospective analysis of clinical data of 157 patients over 65 with cognitive impairment who were hospitalized in the comprehensive ward from October 2019 to February 2023 was conducted. Patients were assigned into delirium and non-delirium groups according to whether they exhibited delirium during hospitalization. General information about the patients and Visual Analogue Scale (VAS) score, blood C-reactive protein level, and blood superoxide dismutase (SOD) level were recorded. Univariate analysis was used to identify potential risk factors for delirium, and factors with statistical significance were subjected to multivariate logistic regression analysis. A prediction line chart for delirium in elderly dementia patients was constructed using R 4.03 software, and the model was validated. RESULTS: Among the 157 patients with senile dementia, 42 patients exhibited delirium and 115 patients exhibited non-delirium. Multivariate logistic regression analysis showed that diabetes, cerebrovascular disease, VAS score ≥4 points, use of sedative drugs, and blood SOD <129 U/mL were independent risk factors for delirium during hospitalization in elderly dementia patients. A prediction nomogram was plotted based on the five risk factors, and receiver operating characteristic curve analysis presented an area under the curve of .875 (95% CI: .816-.934). The nomogram model was internally validated by the Bootstrap method, and the calibration curve showed good agreement between predicted and actual results. Hosmer-Lemeshow test demonstrated that the model had a good fit and high predictive ability. CONCLUSION: Diabetes, cerebrovascular disease, VAS ≥4 points, use of sedative drugs, and blood SOD <129 U/mL were independent risk factors for delirium in patients with senile dementia during hospitalization. The nomogram model had good accuracy and clinical application value for predicting delirium in this study.


Assuntos
Doença de Alzheimer , Transtornos Cerebrovasculares , Delírio , Diabetes Mellitus , Humanos , Idoso , Estudos Retrospectivos , Delírio/epidemiologia , Doença de Alzheimer/complicações , Fatores de Risco , Superóxido Dismutase , Hipnóticos e Sedativos
16.
Nat Commun ; 14(1): 5778, 2023 09 18.
Artigo em Inglês | MEDLINE | ID: mdl-37723178

RESUMO

The pro-inflammatory state of macrophages, underpinned by their metabolic condition, is essentially affecting their capacity of combating tumor cells. Here we find, via a pooled metabolic gene knockout CRISPR screen that KEAP1 and ACOD1 are strong regulators of the pro-inflammatory state in macrophages. We show that ACOD1 knockout macrophages, generated in our induced pluripotent stem cell-derived CAR-macrophage (CAR-iMAC) platform, are strongly and persistently polarized toward the pro-inflammatory state, which manifests in increased reactive oxygen species (ROS) production, more potent phagocytosis and enhanced cytotoxic functions against cancer cells in vitro. In ovarian or pancreatic cancer mouse models, ACOD1-depleted CAR-iMACs exhibit enhanced capacity in repressing tumors, leading to increased survival. In addition, combining ACOD1-depleted CAR-iMACs with immune checkpoint inhibitors (ICI), such as anti-CD47 or anti-PD1 antibodies, result in even stronger tumor suppressing effect. Mechanistically, the depletion of ACOD1 reduces levels of the immuno-metabolite itaconate, allowing KEAP1 to prevent NRF2 from entering the nucleus to activate an anti-inflammatory program. This study thus lays down the proof of principle for targeting ACOD1 in myeloid cells for cancer immunotherapy and introduces metabolically engineered human iPSC-derived CAR-iMACs cells with enhanced polarization and anti-tumor functions in adoptive cell transfer therapies.


Assuntos
Células-Tronco Pluripotentes Induzidas , Neoplasias Pancreáticas , Animais , Camundongos , Humanos , Proteína 1 Associada a ECH Semelhante a Kelch/genética , Fator 2 Relacionado a NF-E2/genética , Macrófagos
17.
Plant Physiol ; 193(4): 2413-2429, 2023 Nov 22.
Artigo em Inglês | MEDLINE | ID: mdl-37647542

RESUMO

Plant flowering time is induced by environmental and endogenous signals perceived by the plant. The MCM1-AGAMOUSDEFICIENS-Serum Response Factor-box (MADS-box) protein SHORT VEGETATIVE PHASE (SVP) is a pivotal repressor that negatively regulates the floral transition during the vegetative phase; however, the transcriptional regulatory mechanism remains poorly understood. Here, we report that CmSVP, a chrysanthemum (Chrysanthemum morifolium Ramat.) homolog of SVP, can repress the expression of a key flowering gene, a chrysanthemum FLOWERING LOCUS T-like gene (CmFTL3), by binding its promoter CArG element to delay flowering in the ambient temperature pathway in chrysanthemum. Protein-protein interaction assays identified an interaction between CmSVP and CmTPL1-2, a chrysanthemum homologue of TOPLESS (TPL) that plays critical roles as transcriptional corepressor in many aspects of plant life. Genetic analyses revealed the CmSVP-CmTPL1-2 transcriptional complex is a prerequisite for CmSVP to act as a floral repressor. Furthermore, overexpression of CmSVP rescued the phenotype of the svp-31 mutant in Arabidopsis (Arabidopsis thaliana), overexpression of AtSVP or CmSVP in the Arabidopsis dominant-negative mutation tpl-1 led to ineffective late flowering, and AtSVP interacted with AtTPL, confirming the conserved function of SVP in chrysanthemum and Arabidopsis. We have validated a conserved machinery wherein SVP partially relies on TPL to inhibit flowering via a thermosensory pathway.


Assuntos
Proteínas de Arabidopsis , Arabidopsis , Chrysanthemum , Arabidopsis/metabolismo , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Proteínas de Arabidopsis/metabolismo , Proteínas Correpressoras/genética , Chrysanthemum/genética , Chrysanthemum/metabolismo , Flores/fisiologia , Regulação da Expressão Gênica de Plantas
18.
Chemistry ; 29(53): e202301520, 2023 Sep 21.
Artigo em Inglês | MEDLINE | ID: mdl-37382237

RESUMO

Intermolecular [2+2] photodimerization provides a distinctive approach to construct photoresponsive fluorescent materials in a manner of switching on solid-state fluorescence. Herein, we report efficient photoactivation of bright solid-state fluorescence based on controllable intermolecular [2+2] photodimerization reaction of benzo[b]thiophene 1,1-dioxide (BTO) derivatives, which provides a simple and effective way to construct smart photoresponsive solid-state fluorescent materials. Rational choice of substituents in BTO molecular skeleton enables them to efficiently undergo photodimerization through regulating molecular stacking in crystal, and also leads to photoactivation of solid-state fluorescence due to the generation of brightly fluorescent photodimers. This intermolecular photodimerization reaction also offers an effective method to synthesize photostable AIEgens with purely through-space conjugation.

19.
Zhongguo Yi Xue Ke Xue Yuan Xue Bao ; 45(2): 341-345, 2023 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-37157086

RESUMO

We reported the comprehensive treatment of an elderly critically ill patient with pelvic fracture.The functions and quality of life of the patient were recovered after collaborative nursing by both family and hospital according to the general practice principle of both mental and physical rehabilitation.We summarized the diagnosis and treatment strategies of this case,aiming to provide reference for the clinical treatment of such cases.


Assuntos
Fraturas do Quadril , Humanos , Idoso , Fraturas do Quadril/reabilitação , Qualidade de Vida , Insuficiência de Múltiplos Órgãos
20.
Front Plant Sci ; 14: 1161539, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37077638

RESUMO

The 14-3-3 (GRF, general regulatory factor) regulatory proteins are highly conserved and are widely distributed throughout the eukaryotes. They are involved in the growth and development of organisms via target protein interactions. Although many plant 14-3-3 proteins were identified in response to stresses, little is known about their involvement in salt tolerance in apples. In our study, nineteen apple 14-3-3 proteins were cloned and identified. The transcript levels of Md14-3-3 genes were either up or down-regulated in response to salinity treatments. Specifically, the transcript level of MdGRF6 (a member of the Md14-3-3 genes family) decreased due to salt stress treatment. The phenotypes of transgenic tobacco lines and wild-type (WT) did not affect plant growth under normal conditions. However, the germination rate and salt tolerance of transgenic tobacco was lower compared to the WT. Transgenic tobacco demonstrated decreased salt tolerance. The transgenic apple calli overexpressing MdGRF6 exhibited greater sensitivity to salt stress compared to the WT plants, whereas the MdGRF6-RNAi transgenic apple calli improved salt stress tolerance. Moreover, the salt stress-related genes (MdSOS2, MdSOS3, MdNHX1, MdATK2/3, MdCBL-1, MdMYB46, MdWRKY30, and MdHB-7) were more strongly down-regulated in MdGRF6-OE transgenic apple calli lines than in the WT when subjected to salt stress treatment. Taken together, these results provide new insights into the roles of 14-3-3 protein MdGRF6 in modulating salt responses in plants.

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