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1.
Opt Express ; 32(11): 20401-20411, 2024 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-38859152

RESUMO

A FMCW LiDAR system of both the distributed feedback laser and external cavity laser is established in baseband beat notes, rather than up-conversion to an intermediate frequency to exclude flicker noise. Meanwhile, utilizing fast-scanning MEMS mirrors, high-quality real-time (1 fps) 4-D images of the slow-moving object (10 mm/s) can be directly constructed at the baseband with a central frequency as low as 100 kHz and a small Doppler shift. The proposed LiDAR architecture based on such a low-frequency baseband significantly improves the optical power budget on the transmitter side and eliminates the costly high-speed sampling circuits on the receiver side.

2.
Artigo em Inglês | MEDLINE | ID: mdl-38920069

RESUMO

BACKGROUND: Immune Checkpoint Inhibitors (ICIs) are becoming a new treatment approach for patients with unresectable hepatocellular carcinoma (uHCC). However, the results regarding its efficacy compared with the standard regimen of targeted therapy are not consistent. AIMS: Our aim was to conduct a meta-analysis of existing studies to reveal the differences in the efficacy and safety of the two systems of treatment. METHODS: The related studies were searched in PubMed, Web of Science, the Cochrane Library, and Embase from inception to June 30th, 2022. Data on overall survival (OS), progression-free survival (PFS), objective response rate (ORR), disease control rate (DCR), and rate of treatment- related adverse events (TrAEs) with their 95% confidence intervals (CI) were pooled and analyzed by Stata 12.0 software. RESULTS: A total of ten high-quality controlled clinical studies with 5,539 patients with uHCC were included. The hazard ratio (HR) of the OS and PFS were 0.80 (95% CI, 0.74-0.86) and 0.72 (95% CI, 0.58-0.89), respectively. In addition, the odds ratio (OR) of the ORR and DCR were 3.39 (95% CI, 2.75-4.17) and 1.20 (95% CI, 0.84-1.73), respectively. The ORR of ICIs monotherapy, ICIs plus anti-vascular endothelial growth factor (VEGF) and ICIs plus ICIs were 16% (95% CI, 0.13-0.18), 17% (95% CI, 0.10-0.27), and 20% (95% CI, 0.16-0.24), respectively. For all included studies, the OR of the overall TrAEs was 0.51(95% CI, 0.22-1.18), and grade ≥ 3 TrAEs was 0.78 (95% CI, 0.53-1.14). CONCLUSION: ICIs were more effective than targeted drugs concerning survival periods and ORR in patients with uHCC while maintaining a stable safety profile.

3.
Talanta ; 276: 126215, 2024 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-38723474

RESUMO

Antibody detection is the critical first step for tracking the spread of many diseases including COVID-19. Lateral flow immunoassay (LFIA) is the most commonly used method for rapid antibody detection because it is easy-to-use and inexpensive. However, LFIA has limited sensitivity when gold nanoparticles (AuNPs) are used as the signals. In this study, the endospores of Bacillus subtilis were used in combination with AuNP in a LFIA to detect antibodies. The endospores serve as a signal amplifier. The detection limit was about 10-8 M for anti-beta galactosidase antibody detection whereas the detection limit of conventional LFIA is about 10-6 M. Furthermore, the proposed methods have no additional user steps compared with the traditional LFIA. This method, therefore, improved the sensitivity 100-fold without compromising any advantages of LFIA. We believe that the proposed method will be useful for detection of antibodies against HIV, Zika virus, SARS-CoV-2, and so on.


Assuntos
Bacillus subtilis , Ouro , Limite de Detecção , Nanopartículas Metálicas , Bacillus subtilis/imunologia , Imunoensaio/métodos , Ouro/química , Nanopartículas Metálicas/química , Humanos , Esporos Bacterianos/imunologia , SARS-CoV-2/imunologia , Anticorpos Antivirais/imunologia , COVID-19/diagnóstico , COVID-19/imunologia , COVID-19/virologia , Zika virus/imunologia
4.
World J Gastrointest Surg ; 16(2): 554-570, 2024 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-38463369

RESUMO

BACKGROUND: For resectable hepatocellular carcinoma (HCC), radical hepatectomy is commonly used as a curative treatment. However, postoperative recurrence significantly diminishes the overall survival (OS) of HCC patients, especially with microvascular invasion (MVI) as an independent high-risk factor for recurrence. While some studies suggest that postoperative adjuvant therapy may decrease the risk of recurrence following liver resection in HCC patients, the specific role of adjuvant therapies in those with MVI remains unclear. AIM: To conduct a network meta-analysis (NMA) to evaluate the efficacy of various adjuvant therapies and determine the optimal adjuvant regimen. METHODS: A systematic literature search was conducted on PubMed, EMBASE, and Web of Science until April 6, 2023. Studies comparing different adjuvant therapies or comparing adjuvant therapy with hepatectomy alone were included. Hazard ratios (HRs) with 95% confidence intervals were used to combine data on recurrence free survival and OS in both pairwise meta-analyses and NMA. RESULTS: Fourteen eligible trials (2268 patients) reporting five different therapies were included. In terms of reducing the risk of recurrence, radiotherapy (RT) [HR = 0.34 (0.23, 0.5); surface under the cumulative ranking curve (SUCRA) = 97.7%] was found to be the most effective adjuvant therapy, followed by hepatic artery infusion chemotherapy [HR = 0.52 (0.35, 0.76); SUCRA = 65.1%]. Regarding OS improvement, RT [HR: 0.35 (0.2, 0.61); SUCRA = 93.1%] demonstrated the highest effectiveness, followed by sorafenib [HR = 0.48 (0.32, 0.69); SUCRA = 70.9%]. CONCLUSION: Adjuvant therapy following hepatectomy may reduce the risk of recurrence and provide a survival benefit for HCC patients with MVI. RT appears to be the most effective adjuvant regimen.

6.
Prenat Diagn ; 44(2): 167-171, 2024 02.
Artigo em Inglês | MEDLINE | ID: mdl-37749763

RESUMO

OBJECTIVE: To elucidate an etiology in a case with persistent oligohydramnios by prenatal diagnosis and actively treat the case to achieve good prognosis. METHODS: We performed whole exome sequencing (WES) of DNA from the fetus and parents. Serial amnioinfusions were conducted until birth. Pressors were required to maintain normal blood pressure. The infant angiotensin-converting enzyme (ACE) activity, angiotensin II (Ang II, a downstream product of ACE), and compensatory enzymes (CEs) activities were measured. Compensatory enzyme activities in plasma from age-matched healthy controls were also detected. RESULTS: We identified a fetus with a severe ACE mutation prenatally. The infant was born prematurely without pulmonary dysplasia. Hypotension and anuria resolved spontaneously. He had almost no ACE activity, but his Ang II level and CE activity exceeded the upper limit of the normal range and the upper limit of the 95% confidence interval of controls, respectively. His renal function also largely recovered. CONCLUSION: Fetuses with ACE mutations can be diagnosed prenatally through WES. Serial amnioinfusion permits the continuation of pregnancy in fetal ACE deficiency. Compensatory enzymes for defective ACE appeared postnatally. Renal function may be spared by preterm delivery; furthermore, for postnatal vasopressor therapy to begin, improving renal perfusion pressure before nephrogenesis has been completed.


Assuntos
Oligo-Hidrâmnio , Peptidil Dipeptidase A , Gravidez , Recém-Nascido , Masculino , Feminino , Humanos , Peptidil Dipeptidase A/genética , Diagnóstico Pré-Natal , Feto , Oligo-Hidrâmnio/diagnóstico por imagem , Oligo-Hidrâmnio/terapia , Parto Obstétrico
8.
J Biol Chem ; 300(1): 105556, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38097188

RESUMO

A renewable source of porcine macrophages derived from pluripotent stem cells (PSCs) would be a valuable alternative to primary porcine alveolar macrophages (PAMs) in the research of host-pathogen interaction mechanisms. We developed an efficient and rapid protocol, within 11 days, to derive macrophages from porcine PSCs (pPSCs). The pPSC-derived macrophages (pPSCdMs) exhibited molecular and functional characteristics of primary macrophages. The pPSCdMs showed macrophage-specific surface protein expression and macrophage-specific transcription factors, similar to PAMs. The pPSCdMs also exhibited the functional characteristics of macrophages, such as endocytosis, phagocytosis, porcine respiratory and reproductive syndrome virus infection and the response to lipopolysaccharide stimulation. Furthermore, we performed transcriptome sequencing of the whole differentiation process to track the fate transitions of porcine PSCs involved in the signaling pathway. The activation of transforming growth factor beta signaling was required for the formation of mesoderm and the inhibition of the transforming growth factor beta signaling pathway at the hematopoietic endothelium stage could enhance the fate transformation of hematopoiesis. In summary, we developed an efficient and rapid protocol to generate pPSCdMs that showed aspects of functional maturity comparable with PAMs. pPSCdMs could provide a broad prospect for the platforms of host-pathogen interaction mechanisms.


Assuntos
Macrófagos Alveolares , Células-Tronco Pluripotentes , Suínos , Animais , Endocitose , Hematopoese/efeitos dos fármacos , Lipopolissacarídeos/farmacologia , Macrófagos Alveolares/citologia , Macrófagos Alveolares/efeitos dos fármacos , Macrófagos Alveolares/metabolismo , Macrófagos Alveolares/virologia , Mesoderma/metabolismo , Células-Tronco Pluripotentes/citologia , Células-Tronco Pluripotentes/efeitos dos fármacos , Vírus da Síndrome Respiratória e Reprodutiva Suína/fisiologia , Transdução de Sinais/efeitos dos fármacos , Suínos/virologia , Fatores de Transcrição/metabolismo , Fator de Crescimento Transformador beta/metabolismo , Fatores de Tempo
9.
Research (Wash D C) ; 6: 0238, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37789987

RESUMO

The recently discovered ATi3Bi5 (A=Cs, Rb) exhibit intriguing quantum phenomena including superconductivity, electronic nematicity, and abundant topological states. ATi3Bi5 present promising platforms for studying kagome superconductivity, band topology, and charge orders in parallel with AV3Sb5. In this work, we comprehensively analyze various properties of ATi3Bi5 covering superconductivity under pressure and doping, band topology under pressure, thermal conductivity, heat capacity, electrical resistance, and spin Hall conductivity (SHC) using first-principles calculations. Calculated superconducting transition temperature (Tc) of CsTi3Bi5 and RbTi3Bi5 at ambient pressure are about 1.85 and 1.92 K. When subject to pressure, Tc of CsTi3Bi5 exhibits a special valley and dome shape, which arises from quasi-two-dimensional compression to three-dimensional isotropic compression within the context of an overall decreasing trend. Furthermore, Tc of RbTi3Bi5 can be effectively enhanced up to 3.09 K by tuning the kagome van Hove singularities (VHSs) and flat band through doping. Pressures can also induce abundant topological surface states at the Fermi energy (EF) and tune VHSs across EF. Additionally, our transport calculations are in excellent agreement with recent experiments, confirming the absence of charge density wave. Notably, SHC of CsTi3Bi5 can reach up to 226ℏ ·(e· Ω ·cm)-1 at EF. Our work provides a timely and detailed analysis of the rich physical properties for ATi3Bi5, offering valuable insights for further experimental verifications and investigations in this field.

10.
PLoS One ; 18(8): e0290164, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37582105

RESUMO

AIM: The aim of this study was to evaluate the efficacy and safety of the anticoagulants for the prevention of portal vein system thrombosis (PVST) in patients with cirrhosis after splenectomy and explore the optimal time of anticoagulant administration. METHODS: A systematic literature search was performed using PubMed, Embase and China Biology Medicine disc (CBM)databases, so as to screen out studies comparing the prognoses between cirrhotic post-splenectomy patients treated with and without anticoagulants. The parameters that were analyzed included the incidence of PVST and postoperative bleeding. RESULTS: With a total of 592 subjects, we included 8 studies (6 observational and 2 randomized trials) that fulfilled the inclusion criteria. We found that the incidence of PVST was significantly lower in the anticoagulation group during the first 6 months of anticoagulant administration. And the largest difference in the incidence of PVST between the anticoagulation and control groups was observed at 3 months (odds ratio 0.17(0.11~0.27); P = 0.767; I2 = 0.0%) and 6 months (OR = 0.21(0.11~0.40); P = 0.714; I2 = 0.0%) postoperatively. The incidence of bleeding was not significantly higher in the anticoagulation group (odds ratio 0.71 (0.30~1.71); P = 0.580; I2 = 0.0%). CONCLUSION: Low-molecular weight heparin (LMWH) and warfarin can decrease the incidence of PVST in post-splenectomy cirrhotic patients without an increased risk of bleeding. And the optimal use time of warfarin is 6 months after splenectomy.


Assuntos
Trombose Venosa , Varfarina , Humanos , Varfarina/uso terapêutico , Veia Porta/patologia , Heparina de Baixo Peso Molecular , Esplenectomia/efeitos adversos , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/prevenção & controle , Complicações Pós-Operatórias/epidemiologia , Trombose Venosa/etiologia , Trombose Venosa/prevenção & controle , Trombose Venosa/epidemiologia , Anticoagulantes/uso terapêutico , Cirrose Hepática/complicações , Cirrose Hepática/cirurgia
11.
Thromb J ; 21(1): 67, 2023 Jun 16.
Artigo em Inglês | MEDLINE | ID: mdl-37328882

RESUMO

Neutrophil extracellular traps (NETs) as special release products of neutrophils have received extensive attention. They are composed of decondensed chromatin and coated with nucleoproteins, including histones and some granulosa proteins. NETs can form a network structure to effectively capture and eliminate pathogens and prevent their spread. Not only that, recent studies have shown that NETs also play an important role in venous thrombosis. This review provides the most important updated evidence regarding the mechanism of NETs formation and the role of NETs in the process of venous thrombosis. The potential prophylactic and therapeutic value of NETs in venous thrombotic disease will also be discussed.

12.
J Ethnopharmacol ; 317: 116763, 2023 Dec 05.
Artigo em Inglês | MEDLINE | ID: mdl-37315646

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: As prevalent acute respiratory condition in clinical practice, acute lung injury has a quick start and severe symptoms which can harm patients physically. Chaihu Qingwen granules (CHQW) is a classic formula for the treatment of respiratory diseases. Clinical observation shows that CHQW has good efficacy in treating colds, coughs, and fevers. AIM OF THE STUDY: The aim of this study was to investigate the anti-inflammatory effect of CHQW on lipopolysaccharide (LPS)-induced acute lung injury (ALI) model in rats and to explore its potential mechanism, as well as to clarify its substance composition. MATERIALS AND METHODS: Male SD rats were randomly divided into the blank group, the model group, the ibuprofen group, the Lianhua Qingwen capsule group and the CHQW group (2, 4 and 8 g/kg, respectively). The LPS-induced acute lung injury (ALI) model in rats was established after pre-administration. The histopathological changes in the lung and the levels of inflammatory factors in bronchoalveolar lavage fluid (BALF) and serum of ALI rats were observed. The inflammation-related proteins toll-like receptor 4 (TLR4), inhibitory kappa B alpha (IκBα), phospho-IκBα (p-IκBα), nuclear-factor-kappa B (NF-κB), and NLR family pyrin domain containing 3(NLRP3) expression levels were measured by western blotting analysis and immunohistochemical analysis. The chemical composition of CHQW was identified by liquid chromatography-quadrupole-time of flight-mass spectrometry (LC-Q-TOF-MS). RESULTS: CHQW significantly ameliorated lung tissue pathological injury in LPS-induced ALI rats and decreased the release of inflammatory cytokines (interleukin-1ß, interleukin-17 and tumor necrosis factor-α) in BALF and serum. In addition, CHQW decreased the expression of TLR4, p-IκBα and NF-κB proteins, increased the level of IκBα, regulated the TLR4/NF-κB signaling pathway, and inhibited the activation of NLRP3. The chemical components of CHQW were analyzed by LC-Q-TOF-MS, and a total of 48 components were identified by combining information from the literature, mainly flavonoids, organic acids, lignans, iridoids and phenylethanoid glycosides. CONCLUSION: The results of this study showed that the pretreatment of CHQW had a strong protective effect on LPS-induced ALI in rats, reducing lung tissue lesions and decreasing inflammatory cytokines released in BALF and serum. The protective mechanism of CHQW may be related to the inhibition of the TLR4/NF-κB signaling pathway and NLRP3 activation. The main active ingredients of CHQW are flavonoids, organic acids, lignans, iridoids and phenylethanoid glycosides.


Assuntos
Lesão Pulmonar Aguda , NF-kappa B , Ratos , Masculino , Animais , NF-kappa B/metabolismo , Receptor 4 Toll-Like/metabolismo , Inibidor de NF-kappaB alfa , Proteína 3 que Contém Domínio de Pirina da Família NLR , Lipopolissacarídeos/farmacologia , Ratos Sprague-Dawley , Pulmão , Lesão Pulmonar Aguda/induzido quimicamente , Lesão Pulmonar Aguda/tratamento farmacológico , Lesão Pulmonar Aguda/metabolismo , Citocinas/metabolismo , Flavonoides/farmacologia , Flavonoides/uso terapêutico , Anti-Inflamatórios/efeitos adversos , Glicosídeos/farmacologia
13.
Zhongguo Gu Shang ; 36(4): 302-8, 2023 Apr 25.
Artigo em Chinês | MEDLINE | ID: mdl-37087616

RESUMO

OBJECTIVE: To compare clinical efficacy of No-touch technique and traditional retractor in treating calcaneal fracture. METHODS: Clinical data of 74 calcaneal fracture patients with closed Sanders typeⅡ to Ⅳ were retrospectively analyzed from July 2019 to June 2021. According to different treatment methods, the patients were divided into No-touch group and conventional group, 37 patinets in each group. In No-touch group, there were 25 males and 12 females, aged from 19 to 70 years old with an average of (42.64±14.16) years old;17 patients were typeⅡ, 14 patinets with type Ⅲ, 6 patients with type Ⅳ according to Sanders fracture classification;three 2.0 mm Kirschner wires were implanted into the talus body, talus neck, and cuboid bone, and the flap was turned upward to expose the operation area. In conventional group, there were 30 males and 7 females, aged from 19 to 67 years old with an average of (41.56±11.38) years old;17 patients with typeⅡ, 12 patients with type Ⅲ, 8 patients with type Ⅳ according to Sanders fracture classification;the operation was completed by exposing the operation area with traditional retractor. Operation time, postoperative incision complications, postoperaive American Orthopedic Foot and Ankle Society (AOFAS) ankle hind foot score at 6 months between two groups were compared. RESULTS: Seventy-four patients were followed up, and follow-up time in No-touch group ranged from 6 to 17 months with an average of(9.57±2.72) months, while in conventional group ranged from 6 to 16 months with an averge of(9.14±2.71) months, and no difference in follow-up between two groups (P>0.05). Operation time in No-touch group (55.67±7.94) min was shorter than that in conventional group (70.16±9.41) min (P<0.05);four patients in No-touch group occurred incision complications, while 8 patients in normal group, and had statistically difference(P<0.05). Daily activities and support, maximum walking distance (block), ground walking, limited degree of flexion, extension and valgus, foot alignment and total score of AOFAS scores in No-touch group was significantly higher than that of conventional group (P<0.05). There were no significant difference in pain degree, abnormal gait and ankle hind foot stability between two groups(P>0.05). According to AOFAS score, 19 patients got excellent result, 16 good and 2 poor in No-touch group;while 9 excellent, 24 good, and 4 poor in conventional group, and no difference between two groups (P>0.05). CONCLUSION: Compared with traditional retractor in treating calcaneal fracture, No-touch technology could significantly shorten operation time, reduce incidence of postopertive complications, while two methods could improve excellent and good rate of ankle joint function recovery after operation.


Assuntos
Traumatismos do Tornozelo , Calcâneo , Traumatismos do Pé , Fraturas Ósseas , Traumatismos do Joelho , Tálus , Masculino , Feminino , Humanos , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Idoso , Fixação Interna de Fraturas , Estudos Retrospectivos , Calcâneo/cirurgia , Fraturas Ósseas/cirurgia , Resultado do Tratamento , Articulação do Tornozelo , Complicações Pós-Operatórias
14.
Toxicol Appl Pharmacol ; 466: 116475, 2023 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-36931438

RESUMO

The drug-drug interactions (DDIs) between tacrolimus and voriconazole are highly variable among individuals. We aimed to develop a physiologically based pharmacokinetic (PBPK) model to predict the DDIs in people with different CYP3A5 and CYP2C19 alleles. First, pharmacokinetic data of humans receiving tacrolimus with or without voriconazole from the literature were used to construct and validate the PBPK model. Thereafter, we developed a model incorporating the metabolism of voriconazole mediated by CYP2C19 and the inhibitory effect of voriconazole on CYP3A4/5. Finally, the model was used to evaluate the dose adjustment of tacrolimus in people with different CYP3A5 and CYP2C19 alleles. When tacrolimus was administered alone (3 mg PO, single dose), the predicted AUC0-∞ of tacrolimus in CYP3A5 nonexpressers (19.22) was 3.5-fold higher than that in expressers (5.48). Following voriconazole (200 mg PO, bid) administration in human with different CYP2C19 genotypes, the AUC0-∞ of tacrolimus increased by 5.1- to 8.3-fold in CYP3A5 expressers and by 5.3- to 10.2-fold in CYP3A5 nonexpressers. The lower the gene expression level of CYP2C19 in the population, the higher the exposure to tacrolimus. When tacrolimus was combined with voriconazole (200 mg, bid; 400 mg, bid, on Day 1), the final model simulations suggested that the dose regimen of tacrolimus should be regulated to 0.15 mg/kg/day (qd) in CYP3A5 expressers with different CYP2C19 genotypes. For CYP3A5 nonexpressers, the dosing schedule of tacrolimus should be modified to 0.05 mg/kg/24 h for patients with 2C19 EM, 0.05 mg/kg/48 h for 2C19 IM and 0.05 mg/kg/72 h for 2C19 PM. In conclusion, a PBPK model with CYP3A5 and CYP2C19 polymorphisms was successfully established, providing more insights regarding the DDIs between tacrolimus and voriconazole to guide the clinical use of tacrolimus.


Assuntos
Citocromo P-450 CYP3A , Tacrolimo , Humanos , Voriconazol , Citocromo P-450 CYP3A/genética , Alelos , Imunossupressores , Citocromo P-450 CYP2C19/genética , Genótipo
15.
iScience ; 26(1): 105813, 2023 Jan 20.
Artigo em Inglês | MEDLINE | ID: mdl-36619974

RESUMO

Topological superconductors (TSC) become a focus of research due to the accompanying Majorana fermions. However, the reported TSC are extremely rare. Recent experiments reported kagome TSC AV3Sb5 (A = K, Rb, and Cs) exhibit unique superconductivity, topological surface states (TSS), and Majorana bound states. More recently, the first titanium-based kagome superconductor CsTi3Bi5 with nontrivial topology was successfully synthesized as a perspective TSC. Given that Cs contributes little to electronic structures of CsTi3Bi5 and binary compounds may be easier to be synthesized, here, by first-principle calculations, we predict five stable nonmagnetic kagome compounds Ti6X4 (X = Bi, Sb, Pb, Tl, and In) which exhibit superconductivity with critical temperature Tc = 3.8 K - 5.1 K, nontrivial Z 2 band topology, and TSS close to the Fermi level. Additionally, large intrinsic spin Hall effect is obtained in Ti6X4, which is caused by gapped Dirac nodal lines due to a strong spin-orbit coupling. This work offers new platforms for TSC and spintronic devices.

17.
Mitochondrial DNA B Resour ; 7(9): 1622-1623, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36106195

RESUMO

The complete chloroplast genome of Rubus pacificus, a representative species of R. sect. Malachobatus subsect. Stipulosi, has been characterized by reference-based assembly using Illumina paired-end data. The complete chloroplast genome is 156,255 bp in length, containing a large single-copy region (LSC) of 85,864 bp and a small single-copy region (SSC) of 18,849 bp, which are separated by a pair of inverted repeat regions (IR) of 25,771 bp. A total of 129 genes were predicted from the chloroplast genome, including 85 protein-coding genes, 36 tRNA genes, and eight rRNA genes. According to the present sampling, phylogenetic analysis reveals that R. pacificus and R. laciniatostipulatus form a strongly supported clade and R. sect. Malachobatus subsect. Stipulosi is not monophyletic.

18.
Entropy (Basel) ; 24(7)2022 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-35885214

RESUMO

Aiming to solve the problem of dense-frequency signals in the power system caused by the growing proportion of new energy, this paper proposes a dense-frequency signal-detection method based on the primal-dual splitting method. After establishing the Taylor-Fourier model of the signal, the proposed method uses the sparse property of the coefficient matrix to obtain the convex optimization form of the model. Then, the optimal solution of the estimated phasor is obtained by iterating over the fixed-point equation, finally acquiring the optimal estimation result for the dense signal. When representing the Taylor-Fourier model as a convex optimization form, the introduction of measuring-error entropy makes the solution of the model more rigorous. It can be further verified through simulation experiments that the estimation accuracy of the primal-dual splitting method proposed in this paper for dense signals can meet the M-class PMU accuracy requirements.

19.
Stem Cell Res Ther ; 13(1): 379, 2022 07 28.
Artigo em Inglês | MEDLINE | ID: mdl-35902973

RESUMO

BACKGROUND: Acute kidney injury (AKI) is a complex disease and can be generally divided into prerenal, intrarenal, and postrenal AKI (PR-AKI). Previous studies have shown that mesenchymal stem cells (MSCs)-derived extracellular vesicles have protective function on prerenal and intrarenal AKI treatment, but whether they have therapeutic efficacy on PR-AKI remains unclear. In this study, we investigated the therapeutic efficacy of allogeneic adipose mesenchymal stem cell-derived extracellular vesicles (ADMSCEVs) on cat models of PR-AKI. METHODS: The cat models of PR-AKI were established by using artificial urinary occlusion and then treated with ADMSCEVs. Histopathological section analysis, blood routine analysis, plasma biochemical test, imaging analysis, and plasma ultra-high performance liquid chromatography-MS/MS (UHPLC-MS/MS) were performed to evaluate the therapeutic efficacy of ADMSCEVs. RESULTS: Physiological and biochemical test showed that the ADMSCEVs could recover creatinine, urea nitrogen and plasma phosphorus to homeostasis efficiently. Blood routine analysis showed that leukocytes in PR-AKI cats with ADMSCEVs treatment returned to normal physiological range more quickly than that of control. UHPLC-MS/MS analysis revealed that the plasma metabolome profile of PR-AKI cats treated with ADMSCEVs was highly similar to that of normal cats. Furthermore, UHPLC-MS/MS analysis also revealed six metabolites (carnitine, melibiose, D-Glucosamine, cytidine, dihydroorotic acid, stachyose) in plasma were highly correlated with the dynamic process of PR-AKI on cats. CONCLUSIONS: We demonstrate the efficacy of ADMSCEVs in the treatment of PR-AKI on cats. Our study also suggests six metabolites to be novel PR-AKI markers and to be potential targets for ADMSCEVs therapy. Our findings will be useful to improve clinical treatment of both animal and human PR-AKI patients with ADMSCEVs in the future.


Assuntos
Injúria Renal Aguda , Vesículas Extracelulares , Transplante de Células-Tronco Hematopoéticas , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais , Injúria Renal Aguda/patologia , Injúria Renal Aguda/terapia , Animais , Vesículas Extracelulares/patologia , Humanos , Rim/patologia , Masculino , Transplante de Células-Tronco Mesenquimais/métodos , Células-Tronco Mesenquimais/patologia , Espectrometria de Massas em Tandem
20.
Zhongguo Zhong Yao Za Zhi ; 47(14): 3788-3797, 2022 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-35850836

RESUMO

The present study established specific chromatograms and a method for determining multiple primary components in Yinqiao Powder decoctions and compared the change rules of chemical composition in powder and piece decocting processes of Yinqiao Powder to provide a scientific basis for the modern research of preparations of Yinqiao Powder. Powder and piece decoctions of Yinqiao Powder were prepared. The specific chromatograms were determined and the content of 17 primary components was measured by high-performance liquid chromatography(HPLC), including adoxosidic acid, neochlorogenic acid, forsythoside E, loganic acid, chlorogenic acid, cryptochlorogenic acid, sweroside, forsythoside Ⅰ, forsythoside H, forsythoside A, isochlorogenic acid B, E-aldosecologanin, hesperidin, phillyrin, arctiin, liquiritigenin, and dipotassium glycyrrhizinate. The effect of decocting time on the chemical composition in powder and piece decoctions of Yinqiao Powder was investigated. As a result, the specific chromatogram similarities of powder decoctions of Yinqiao Powder with different decocting time were high, which indicated that their chemical compositions were similar, while the similarities of piece decoctions were low, suggesting similar chemical compositions with big differences. In powder decoctions, the concentrations of neochlorogenic acid, cryptochlorogenic acid, forsytherin H, and isochlorogenic acid B increased with the prolongation of decocting time, and those of adoxosidic acid, forsythoside E, forsythoside Ⅰ, E-aldosecologanin, phillyrin, dipotassium glycyrrhizinate, loganic acid, arctiin, sweroside, and liquiritigenin increased firstly and tended to be stable, while those of forsythoside A, chlorogenic acid, and hesperidin increased firstly and then decreased. In piece decoctions, the concentration of chlorogenic acid increased firstly and then decreased with the prolongation of decocting time, while those of the remaining 16 components showed an upward trend. The concentrations of adoxosidic acid, forsythoside E, forsythoside Ⅰ, E-aldosecologanin, phillyrin, dipotassium glycyrrhizinate, forsythoside A, forsythoside H, and chlorogenic acid in powder decoctions were higher than those in piece decoctions. The concentrations of hesperidin, loganic acid, phillyrin, sweroside, liquiritigenin, neochlorogenic acid, and cryptochlorogenic acid in powder decoctions were higher than those in piece decoctions within 40 min of decocting. The concentration of isochlorogenic acid B in powder decoctions was lower than that in piece decoction 10 min after decocting. The results showed that the decocting time and particle size of raw medicinal materials had certain effects on the content of chemical components in decoctions of Yinqiao Powder. Compared with the piece decocting, the powder decocting could achieve faster resolution of chemical components and higher concentrations, which confirmed the scientific evidence of the traditional powder decocting method of Yinqiao Powder. For the piece decocting of prescriptions of Yinqiao Powder, extraction time should be prolonged and extraction times should be increased to achieve the same effect as the powder decocting.


Assuntos
Medicamentos de Ervas Chinesas , Hesperidina , Neoplasias Primárias Múltiplas , Ácido Clorogênico/análise , Cromatografia Líquida de Alta Pressão/métodos , Medicamentos de Ervas Chinesas/química , Ácido Glicirrízico/análise , Humanos , Pós
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