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1.
J Nanosci Nanotechnol ; 21(1): 310-325, 2021 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-33213632

RESUMO

Scanning electron microscopy (SEM) was used to analyze and study micron-nanometer evaporite samples collected from Paleocene and Eocene drill cores in the Jiangling Depression. Accordingly, seven beds of potassium-bearing solid rocks were accurately identified. Sylvite, carnallite, syngenite, dolomite, thenardite, anhydrite, glauberite, halite, barite, celestite, and other solid salt minerals were found, and carnallite, syngenite, and thenardite were found for the first time in the Jiangling Depression. Sylvite, syngenite, and carnallite indicate that the Paleogene salt lakes in the Jiangling Depression had evolved to the sylvite stage and that prospecting for solid sylvite would be satisfactory. Micron-nanometer celestite is contained in the evaporites, from which we can infer that strontium may have been provided by deep formation water (or oil-field water). This finding is of great significance to studying the genesis of sylvite sediment in the Jiangling Depression. From the extensive development of primary glauberite beds typical of warm salt minerals in the Shashi Formation, it can be inferred that the late Paleogene paleoclimate in the Jiangling Depression of the Jianghan Basin was dry and hot. Based on the extensive distribution of micron-nanometer pyrite, siderite, iron and Fe2O3/FeO ratios in evaporite sediments and color analysis of mudstones, the evaporites in the study area formed in an underwater anoxic, reducing environment during sedimentation. Therefore, the evaporite sediments in the Paleocene-Eocene interval of the Jiangling Depression are proposed to have formed in a saltwater lake sedimentary environment, and the ancient lake was characterized by a deep-water salt lake sedimentary model.

2.
J Virol ; 2020 Nov 04.
Artigo em Inglês | MEDLINE | ID: mdl-33148792

RESUMO

The human immunodeficiency virus (HIV-1) envelope glycoprotein (Env) trimer is transported through the secretory pathway to the infected cell surface and onto virion particles. In the Golgi, the gp160 Env precursor is modified by complex sugars and proteolytically cleaved to produce the mature functional Env trimer, which resists antibody neutralization. We observed mostly uncleaved gp160 and smaller amounts of cleaved gp120 and gp41 Envs on the surface of HIV-1-infected or Env-expressing cells; however, cleaved Envs were relatively enriched in virions and virus-like particles (VLPs). This relative enrichment of cleaved Env in VLPs was observed for wild-type Envs, for Envs lacking the cytoplasmic tail and for CD4-independent, conformationally flexible Envs. On the cell surface, we identified three distinct populations of Envs: 1) the cleaved Env was transported through the Golgi, was modified by complex glycans, formed trimers that crosslinked efficiently, and was recognized by broadly neutralizing antibodies; 2) a small fraction of Env modified by complex carbohydrates escaped cleavage in the Golgi; and 3) the larger population of uncleaved Env lacked complex carbohydrates, crosslinked into diverse oligomeric forms, and was recognized by poorly neutralizing antibodies. This last group of more "open" Env oligomers reached the cell surface in the presence of Brefeldin A, apparently bypassing the Golgi apparatus. Relative to Envs transported through the Golgi, these uncleaved Envs were counterselected for virion incorporation. By employing two pathways for Env transport to the surface of infected cells, HIV-1 can misdirect host antibody responses towards conformationally flexible, uncleaved Env without compromising virus infectivity.IMPORTANCE The envelope glycoprotein (Env) trimers on the surface of human immunodeficiency virus (HIV-1) mediate the entry of the virus into host cells and serve as targets for neutralizing antibodies. The cleaved, functional Env is incorporated into virus particles from the surface of the infected cell. We found that an uncleaved form of Env is transported to the cell surface by an unconventional route, but this non-functional Env is mostly excluded from the virus. Thus, only one of the pathways by which Env is transported to the surface of infected cells results in efficient incorporation into virus particles, potentially allowing the uncleaved Env to act as a decoy to the host immune system without compromising virus infectivity.

3.
Chin J Acad Radiol ; : 1-6, 2020 Nov 16.
Artigo em Inglês | MEDLINE | ID: mdl-33225216

RESUMO

The COVID-19 epidemic has swept across China and spread to other countries. The rapid spreading of COVID-19 and panic combined with the lack of a hierarchical medical system in China have resulted in a huge number of hospital visiting which are overwhelming local medical system and increasing the incidence of cross infection. To meliorate this situation, we adopted the management concept of the system of Tiered Diagnosis and Treatment and developed an online tool for self-triage based on the mostly used multi-purpose smartphone app Wechat in China. This online tool helps people perform self-triage so that they can decide whether to quarantine at home or visit hospital. This tool further provides instructions for home quarantine and help patients make an appointment online if hospital visiting suggested. This smartphone application can reduce the burden on hospitals without losing the truly COVID-19 patients and protect people from the danger of cross infection.

5.
Pharmacol Res ; : 105299, 2020 Nov 07.
Artigo em Inglês | MEDLINE | ID: mdl-33171306

RESUMO

Parthanatos is a PARP1-dependent, caspase-independent, cell-death pathway that is distinct from apoptosis, necrosis, or other known forms of cell death. Parthanatos is a multistep pathway that plays a pivotal role in tumorigenesis. There are many molecules in the parthanatos cascade that can be exploited to create therapeutic interventions for cancer management, including PARP1, PARG, ARH3, AIF, and MIF. These critical molecules are involved in tumor cell proliferation, progression, invasion, and metastasis. Therefore, these molecular signals in the parthanatos cascade represent promising therapeutic targets for cancer therapy. In addition, intimate interactions occur between parthanatos and other forms of cancer cell death, such as apoptosis and autophagy. Thus, co-targeting a combination of parthanatos and other death pathways may further provide a new avenue for cancer precision treatment. In this review, we elaborate on the signaling pathways of canonical parthanatos and briefly introduce the non-canonical parthanatos. We also shed light on the role parthanatos and its associated components play in tumorigenesis, particularly with respect to the aforementioned five molecules, and discuss the promise targeted therapy of parthanatos and its associated components holds for cancer therapy.

6.
J Orthop Surg (Hong Kong) ; 28(3): 2309499020971863, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33176579

RESUMO

PURPOSE: Defect of Achilles tendon and overlying soft tissue remains a surgical challenge due to its insufficient blood supply and high requirement of function. This study aims to report the clinical efficacy of the composite sural neurocutaneous composite flap with gastrocnemius tendon on the complicated defect of Achilles region. METHODS: Seven cases of defects of Achilles tendon and overlying soft tissue were reconstructed by the composite sural neurocutaneous composite flaps with gastrocnemius tendons. It is important to keep the connection between gastrocnemius tendon and deep fascia of the composite flap during operation. The smallest and the largest areas of transferred skin flaps were 7.5 cm × 4.5 cm and 11 cm × 10 cm respectively. The size of gastrocnemius tendon ranged from 5 cm × 3 cm to 9 cm × 4 cm. Patients was evaluated by using the Arner-Lindholm scale at the last follow-up. RESULTS: Six flaps survived completely with no complication. One flap developed wound dehiscence and went on to heal by daily dressing. With 12-60 months follow-up, all patients gained satisfactory appearance and function of ankle, without tendon re-rupture or recurrent infection. Based on Arner-Lindholm scale, six cases were noted to be excellent and one was good. CONCLUSION: The composite sural neurocutaneous flap with gastrocnemius tendon is a viable and practical method to salvage Achilles tendon defect and overlying soft tissue coverage, with minimal adhesion and satisfactory function.

7.
Anal Methods ; 2020 Nov 11.
Artigo em Inglês | MEDLINE | ID: mdl-33174880

RESUMO

Vitamin D metabolites are fat-soluble vitamins that regulate broad spectrum of physiological and pathological processes. Accurate and high-throughput methods for the detection of vitamin D metabolites are essential to elucidate body functions. In this study, a sensitive and high throughput ultra-high performance liquid chromatography with tandem mass spectrometry (UHPLC-MS/MS) method was proposed for the accurate quantification of six vitamin D metabolites, including vitamin D2, vitamin D3, 25-hydroxyvitamin D2, 25-hydroxyvitamin D3, 1,25-dihydroxyvitamin D2, and 1,25-dihydroxyvitamin D3. Through the optimization of chromatographic and mass spectrometric conditions, only 20 µL serum or plasma could satisfy the quantification of six vitamin D metabolites. The limit of detection (LOD) was determined to be 0.02-0.05 pg mL-1. The validation method was carried out following the International Council for Harmonization (ICH) guidelines. All quantification performances, including linearity, accuracy, precision, extraction recovery and matrix effect, were investigated and were satisfactory for the accurate detection of vitamin D metabolites. A disease of the liver or kidney, the main organs for vitamin D metabolism, could lead to abnormal levels of vitamin D. Here, the established UHPLC-MS/MS method was further used for determination of vitamin D levels in plasma samples of patients after liver or kidney transplantation. Thirty-three liver transplant recipients (LTRs) and 63 kidney transplant recipients (KTRs) were included in this study. Vitamin D deficiency or insufficiency is common in KTRs and LTRs, with a prevalence of more than 99%.

8.
J Pharm Pharm Sci ; 23: 451-461, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33217255

RESUMO

PURPOSE: To compare the effectiveness and safety between abiraterone and enzalutamide in the treatment of patients with metastatic castration-resistant prostate cancer (mCRPC). METHODS: We systematically searched for relevant articles from PubMed, Cochrane, Embase from their inception through November 4, 2019. Available articles from conferences were searched. The endpoints were prostate-specific antigen (PSA) response, overall survival (OS), progression-free survival (PFS), number of patients with any adverse event (AE). RESULTS: 15 cohort studies involving 3546 participants were included in this meta-analysis. Pooled result showed that PSA response rate in the enzalutamide group was significantly greater than that in the abiraterone group (867 patients, risk ratio (RR) 0.69, 95% confidence interval (CI) 0.61-0.79, p<0.00001, I2=29%). There was no significant difference in the total incidence of AEs between two groups (730 patients, RR 0.42, 95% CI 0.14-1.31, p = 0.14, I2=84%). The common adverse events observed in the published articles were fatigue and perceived cognitive impairments. Patients who received enzalutamide had the higher risk to have the feeling of fatigue compared with abiraterone group (2555 patients, RR 0.45, 95% CI 0.24-0.85, p=0.01, I2=92%). And there was no statistical difference between two groups respect to the side effect of perceived cognitive impairments (1856 patients, RR 0.94, 95% CI 0.47-1.88, p=0.85, I2=15%). CONCLUSIONS: Our results demonstrated that enzalutamide was associated with higher PSA response rate compared to abiraterone in patients with mCRPC, and no significant difference was found between two groups in the overall AE. But enzalutamide use induced higher risk of the AE of fatigue.

9.
Int J Nanomedicine ; 15: 8231-8247, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33149572

RESUMO

Purpose: Wound healing, especially of infected wounds, remains a clinical challenge in plastic surgery. This study aimed to manufacture a novel and multifunctional wound dressing by combining graphene oxide/copper nanocomposites (GO/Cu) with chitosan/hyaluronic acid, providing significant opportunities for the therapy of wound repair in wounds with a high risk of bacterial infection. Methods: In this study, GO/Cu-decorated chitosan/hyaluronic acid dressings (C/H/GO/Cu) were prepared using sodium trimetaphosphate (STMP) crosslinking and the vacuum freeze-drying method, and chitosan/hyaluronic acid dressings (C/H) and GO-incorporated chitosan/hyaluronic acid dressings (C/H/GO) served as controls. The surface characterization, in vitro degradation under various pH values, antimicrobial potential, cytocompatibility and in vivo therapeutic efficacy in a bacteria-infected full-thickness skin defect model were systematically evaluated. Results: Our experimental results indicated that the acidic environment facilitated the release of copper (CuNPs and Cu2+) from the dressings, and prepared C/H/GO/Cu dressings exhibited significant in vitro antimicrobial activities against the two tested bacterial strains (ATCC35984 and ATCC25923). All three dressings showed satisfactory cytocompatibility with mouse fibroblasts (NIH/3T3-L1). Moreover, remarkably accelerated wound healing was found in the C/H/GO/Cu group, with controlled inflammatory infiltration and improved angiogenesis in granulation tissues. In addition, no pathological damage was noted in the tissue structures of the tested organs (heart, lung, liver and kidney) in any of the four groups. Conclusion: Collectively, GO/Cu-incorporated chitosan/hyaluronic acid dressings suggested a synergistic antimicrobial efficacy and acceptable biocompatibility both in vitro and in vivo, as well as a significantly accelerated healing process of bacteria-infected wounds. Thus, the multifunctional C/H/GO/Cu composite is expected to be a potential alternative for wound dressings, especially for the management of intractable wounds caused by bacterial infection.

10.
Artigo em Inglês | MEDLINE | ID: mdl-33141329

RESUMO

OBJECTIVE: Rate-limiting enzyme 3b-hydroxysteroid dehydrogenase type 1 (3ßHSD1) encoded by HSD3B1 catalyzes the transition of dehydroepiandrosterone (DHEA) to dihydrotestosterone (DHT). The HSD3B1 (1245C) variant renders 3bHSD1 of resistant to ubiquitination and degradation, leading to a large amount of protein accumulation in the cell. Multiple clinical studies have shown that this mutation was correlated with resistance to androgen-deprivation therapy in prostate cancer. However, the results were not consistent depending on different treatment strategy and in some researches, the number of observed cases was relatively small. METHODS: To determine the effects of HSD3B1 (1245C) variant on resistance to androgen-deprivation therapy in prostate cancer, we performed a meta-analysis of the available literature. Electronic database searches identified appropriately designed studies that detected HSD3B1 in prostate cancer. We conducted a systematic search of studies in the following databases: PubMed, and EMBASE published until August 10, 2020 using the following search terms: (HSD3B1 AND ((((prostate cancer) OR prostatic neoplasm) OR prostatic carcinoma) OR prostatic cancer). RESULTS: Eight researches were included in this research. The result validated that the HSD3B1 (1245C) variant allele was associated with a shorter PFS (HR, 1.97; 95% CI, 1.39-2.79; P = 0.0001) (homozygous wild-type group) in men with prostate cancer when treated with ADT, however, a higher PFS (HR, 0.68; 95% CI, 0.48-0.96; P = 0.03) when treated with ADT and CYP17A1 inhibitor. CONCLUSION: The HSD3B1 (1245C) variant is a predictor of ADT plus CYP17A1 inhibitor response in prostate cancer.

11.
Cell Rep ; 33(4): 108322, 2020 10 27.
Artigo em Inglês | MEDLINE | ID: mdl-33091382

RESUMO

Biotin-labeled molecular probes, comprising specific regions of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike, would be helpful in the isolation and characterization of antibodies targeting this recently emerged pathogen. Here, we design constructs incorporating an N-terminal purification tag, a site-specific protease-cleavage site, the probe region of interest, and a C-terminal sequence targeted by biotin ligase. Probe regions include full-length spike ectodomain as well as various subregions, and we also design mutants that eliminate recognition of the angiotensin-converting enzyme 2 (ACE2) receptor. Yields of biotin-labeled probes from transient transfection range from ∼0.5 mg/L for the complete ectodomain to >5 mg/L for several subregions. Probes are characterized for antigenicity and ACE2 recognition, and the structure of the spike ectodomain probe is determined by cryoelectron microscopy. We also characterize antibody-binding specificities and cell-sorting capabilities of the biotinylated probes. Altogether, structure-based design coupled to efficient purification and biotinylation processes can thus enable streamlined development of SARS-CoV-2 spike ectodomain probes.


Assuntos
Anticorpos Neutralizantes/imunologia , Anticorpos Antivirais/imunologia , Infecções por Coronavirus/imunologia , Sondas Moleculares/imunologia , Pneumonia Viral/imunologia , Glicoproteína da Espícula de Coronavírus/imunologia , Especificidade de Anticorpos/imunologia , Sítios de Ligação de Anticorpos/imunologia , Biotinilação , Microscopia Crioeletrônica , Humanos , Pandemias , Peptidil Dipeptidase A/metabolismo , Receptores Virais/metabolismo
12.
Technol Cancer Res Treat ; 19: 1533033820964231, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33073702

RESUMO

In this study we aimed to identify a set of prognostic factors for angioimmunoblastic T-cell lymphoma (AITL) and establish a novel prognostic model. The clinical data of 64 AITL patients enrolled to the Fourth Hospital of Hebei Medical University (from 2012 Jan to 2017 May) were retrospectively analyzed. The estimated 5-year overall survival and progression-free survival of this cohort of patients were 45.8% and 30.8%, respectively. Univariate analysis showed that age > 60 years, performance status ≥2, Ann Arbor stage III/IV, lactate dehydrogenase > 250 U/L, serum albumin (ALB) < 30 g/l, Coombs test positive, and Ki-67 rate ≥ 70% were significantly associated with poor prognosis. Multivariate analysis demonstrated that age > 60 years, ALB < 30 g/l, Ki-67 rate ≥ 70%, and Coombs test positive were independent prognosis factors for AITL. Here a new prognostic model, named as AITLI, was constructed using the top 5 significant prognostic factors for AITL prognostic prediction. The AITL patients were stratified into 3 risk groups: low, intermediate, and high risk groups. The new prognostic model AITLI showed better performance in predicting prognosis than the International Prognostic Index (IPI) and the prognostic index for PTCL, not otherwise specified (PIT) that were wisely used to predict the outcome for patients with other subtypes of lymphoma.

13.
J Clin Pharm Ther ; 2020 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-33015848

RESUMO

WHAT IS KNOWN AND OBJECTIVE: At present, studies on the usage of proton-pump inhibitors (PPIs) have universal significance. In clinical practice, PPIs are widely used to treat a variety of acid-related diseases, but they can be inappropriately prescribed, leading to increased medical costs and patient harm. The study comprehensively evaluated the clinical effects of a clinical pharmacist intervention on inappropriate PPI prescriptions in a tertiary general hospital hepatobiliary surgery ward. METHODS: A retrospective, single-centre intervention study covering the periods of July-December 2018 and July-December 2019 was conducted. In the intervention group, clinical pharmaceutical care was initiated by a clinical pharmacist in the hepatobiliary surgery ward. Outcomes, including the clinical pattern of PPI utilization, the rate of inappropriate PPI use and safety outcomes, were compared between the two periods. RESULTS AND DISCUSSION: In total, 1150 patients were admitted to the hepatobiliary surgery ward in our hospital in the study periods. Of these, 717 patients met the inclusion criteria for this study, and 420 and 297 patients were included in the preintervention and post-intervention groups, respectively. The PPI utilization rates before and after the intervention were 82.0% and 55.0%, respectively. The rates of inappropriate PPI use before and after the intervention were 48.9 and 22.7 per 100 patient-days, respectively. Clinical safety outcomes were nearly identical between before and after the intervention, but patients treated with PPIs were more likely to experience nosocomial pneumonia (2.4% vs. 0.6%). WHAT IS NEW AND CONCLUSION: The implementation of a clinical pharmacist intervention for PPI use decreased inappropriate PPI use during hospitalization without sacrificing clinical safety outcomes.

14.
J Clin Pharm Ther ; 2020 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-33085789

RESUMO

WHAT IS KNOWN AND OBJECTIVE: The incidence of diabetes has been rising worldwide and is expected to increase to affect 591.9 million people by 2035 in China. Strict control of blood glucose can significantly reduce the risk of diabetic complications, but traditional interventions lack continuity, timeliness and teleonomy. The development of mobile health management has become a hot topic, as a very popular app in China, WeChat platform, has a large number of users every day. Many studies show the health management of patients with diabetes through WeChat can achieve the ideal effect. This study aims to evaluate the application of WeChat based on clinical research data, provide clinical evidence for medical staff and promote the self-management of patients with diabetes. METHODS: The PubMed, EMBASE, Cochrane Library, CNKI and Wanfang database were searched to identify related reports that were published up to 9 March 2020. The quality of included studies was assessed by Cochrane Collaboration risk assessment tool. Measures of interest were mean difference (MD) and 95% confidence interval (CI). Random-effect model was used according to the absence or presence of significant heterogeneity. Heterogeneity among trials was evaluated by I2 test. Publication bias was assessed by funnel plots. RESULTS AND DISCUSSION: Thirty-eight articles involved 2,709 controls and 2,709 patients who used WeChat were identified. Relative to the traditional group, WeChat group had a lower level in fasting plasma glucose (FPG in mmol/L; MD: 1.36, 95% CI 1.10-1.62, P < .00001), so did 2hPG (MD: 1.91, 95% CI 1.48-2.35, P < .00001) and HbA1C (MD: 1.07, 95% CI 0.86-1.27, P < .00001). Self-efficacy scale improved significantly, including diet score (MD: -1.31, 95% CI -1.77 to -0.86, P < .00001), exercise score (MD: -1.92, 95% CI -2.44 to -1.40, P < .00001), medication taking score (MD: -1.45, 95% CI: -1.94 to -0.97, P < .00001), monitoring of blood glucose score (MD: -1.17, 95% CI -1.83--0.51, P = .0005) and foot care score (MD: -1.71, 95% CI -2.08 to -1.34, P < .00001). Patients' understanding of the disease and satisfaction with follow-up increased significantly, whereas the incidence of adverse reactions and complications decreased. WHAT IS NEW AND CONCLUSION: WeChat follow-up appears to be helpful to improve the level of blood glucose and self-management, reduce the incidence of adverse reactions and complications, and improve the satisfaction rate of patients with type 2 diabetes. It should be noted that this meta-analysis has limitations, such as small sample sizes and the low quality of included literature, as well as the lack of research in Western countries. Therefore, more high-quality studies with larger samples are needed in the future to verify our results.

15.
Hortic Res ; 7: 163, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33082970

RESUMO

The essential role of ethylene in fruit ripening has been thoroughly studied. However, the involvement of brassinosteroids (BRs) in the regulation of fruit ripening and their relationship with the ethylene pathway are poorly understood. In the current study, we found that BRs were actively synthesized during tomato fruit ripening. We then generated transgenic lines overexpressing or silencing SlCYP90B3, which encodes a cytochrome P450 monooxygenase that catalyzes the rate-limiting step of BR synthesis. The expression level of SlCYP90B3 was positively related to the contents of bioactive BRs as well as the ripening process in tomato fruit, including enhanced softening and increased soluble sugar and flavor volatile contents. Both carotenoid accumulation and ethylene production were strongly correlated with the expression level of SlCYP90B3, corroborated by the altered expression of carotenoid biosynthetic genes as well as ethylene pathway genes in transgenic tomato fruits. However, the application of the ethylene perception inhibitor 1-methycyclopropene (1-MCP) abolished the promotion effect of SlCYP90B3 overexpression on carotenoid accumulation. Taken together, these results increase our understanding of the involvement of SlCYP90B3 in bioactive BR biosynthesis as well as fruit ripening in tomato, thus making SlCYP90B3 a target gene for improvement of visual, nutritional and flavor qualities of tomato fruits with no yield penalty.

16.
Emerg Microbes Infect ; 9(1): 2091-2093, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32930052

RESUMO

We studied plasma antibody responses of 35 patients about 1 month after SARS-CoV-2 infection. Titers of antibodies binding to the viral nucleocapsid and spike proteins were significantly higher in patients with severe disease. Likewise, mean antibody neutralization titers against SARS-CoV-2 pseudovirus and live virus were higher in the sicker patients, by ∼5-fold and ∼7-fold, respectively. These findings have important implications for those pursuing plasma therapy, isolation of neutralizing monoclonal antibodies, and determinants of immunity.


Assuntos
Anticorpos Neutralizantes/sangue , Anticorpos Antivirais/sangue , Betacoronavirus/imunologia , Nucleocapsídeo/imunologia , Glicoproteína da Espícula de Coronavírus/imunologia , Adulto , Idoso , Anticorpos Neutralizantes/imunologia , Anticorpos Antivirais/imunologia , Antígenos Virais/imunologia , Infecções por Coronavirus/imunologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Testes de Neutralização , Pandemias , Pneumonia Viral/imunologia , Índice de Gravidade de Doença , Proteínas do Envelope Viral/imunologia
17.
Dis Markers ; 2020: 8842320, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32733621

RESUMO

Metabolic syndrome (MetS) is a health disorder characterized by metabolic abnormalities that predict an increased risk to develop cardiovascular disease (CVD) and type 2 diabetes. Biomarkers can provide an insight into the novel mechanism for MetS and can be potentially used for personalized response to therapies. We exploited a targeted HPLC-MS/MS method to characterize plasma amino acids and carnitine metabolic profile in MetS patients. A training set (40 cases and 40 controls) and validation set (80 MetS patients and 80 healthy controls) were carried out to find the metabolic profiles. We discovered two carnitine metabolites including hydroxydecanoyl carnitine and methylglutarylcarnitine. Our results indicated that the decreased level of hydroxydecanoyl carnitine and methylglutarylcarnitine may be associated with the risk of MetS. These biomarkers may improve the risk prediction and provide a novel tool for monitoring of the progression of disease and response to treatment in MetS patients.

18.
Colloids Surf B Biointerfaces ; 196: 111291, 2020 Jul 29.
Artigo em Inglês | MEDLINE | ID: mdl-32805591

RESUMO

One of the main diseases contributing to human death are malignant tumors. Phototherapy is a promising approach for cancer therapy, and functional nanoparticles with targeting ligands are commonly used to improve the therapeutic efficiency. However, recent studies have shown that nanoparticles in contact with a biological fluid can rapidly form a "protein corona" on their surface, which will remarkably decrease the targeting ability. Here, we describe the preparation of hybrid nanomaterials with Bi2S3 nanorods as the core, and fluorescein-isothiocyanate and folic acid-modified human serum albumin (HSA-FITC-FA) as the shell. By using fluorescent binding label (FITC) and imaging techniques, we discovered the image of the cell lysosomes, indicating that the photothermal therapy agent was predominantly targeted to and accumulated in lysosomes. Combined with photothermal therapy agent (Bi2S3 nanorods) and targeting ligand (FA), the obtained product shows enhanced photothermal therapy under near-infrared region laser irradiation. Additionally, SDS-PAGE shows that the modified HSA shell could remarkably reduce the reabsorption of protein corona from blood serum, minimized the adverse effect of protein corona on targetability. Taken together, the results indicate that our strategy has the potential for preparing efficient photothermal nanomaterials with image-guided subcellular organelle-targeting cancer cell ablation ability.

19.
Mikrochim Acta ; 187(9): 510, 2020 08 24.
Artigo em Inglês | MEDLINE | ID: mdl-32833097

RESUMO

Poly-o-methoxyaniline (POMA) and zinc oxide (ZnO) composites were prepared via in situ polymerization and characterized by thermogravimetry thermal analysis, X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and N2 sorption measurement. The composites show different morphology when the ratio of POMA and ZnO varies. At a ratio of 2:2, the composite shows thinner nanosheet structure with smooth surface and exhibits best response to NH3 at room temperature. The ZnO@POMA nanosheet sensor shows good selectivity and a wide response range (linear ranges from 0.05-1 pmm and 10-100 ppm of NH3). The lowest detection limit reaches 0.05 ppm. The sensor exhibits good reversibility. Based on the testing results of ultraviolet diffuse reflection spectroscopy and Kelvin probe technique, the adsorption and desorption of NH3 molecules on the sensing material and the formation of p-n heterostructure between ZnO and POMA and their synergistic effects are further explained. More importantly, the sensor possessed excellent moisture resistance. The overall test results of ZnO@POMA show that the sensor has good practical applicability for detecting trace NH3 at room temperature. Graphical abstract.

20.
J Clin Pharm Ther ; 2020 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-32776599

RESUMO

WHAT IS KNOWN AND OBJECTIVE: The aim of this study was to compare the prevalence of potentially inappropriate medications (PIMs) and potential prescribing omissions (PPOs) in elderly Chinese patients identified by the Screening Tool of Older Persons' Prescriptions/Screening Tool to Alert to Right Treatment (STOPP/START) version 2 (v2) and version 1 (v1). The secondary objective was to analyse the risk factors associated with the PIMs/PPOs. METHODS: This was a retrospective cross-sectional study, and all patients were aged ≥65 years and discharged from internal medical wards of Beijing Chaoyang Hospital in December 2018. STOPP/START v2 and STOPP/START v1 were used to detect PIMs/PPOs. The concordance between the two versions was calculated using kappa tests. A logistic regression analysis was carried out to determine variables independently associated with PIM/PPO use. RESULTS AND DISCUSSION: In the 662 patients included, the median age was 73 years and 361 were male (54.53%). PIMs were present in 36.1% and 47.7% of participants according to the STOPP v1 and STOPP v2, respectively. The prevalence of PPOs was 42.0% and 64.2% according to the START v1 and START v2, respectively. Drug prescribed without indication was the most common item in PIMs, whereas ACEIs were the drugs most frequently involved with PPOs according to the STOPP/START v2. Two versions of the STOPP criteria indicated a moderate coherence, whereas two versions of the START criteria showed poor accordance. Age (OR 1.029, 1.004-1.054), gender (OR 1.536, 1.103-2.138) and the number of prescribed medications (<5: OR 1; 5-9: OR 2.503, 1.173-5.342; ≥10: OR 4.324, 2.204-9.235) were associated factors with PIMs identified by the STOPP v2, whereas PPOs identified by the START v2 were independently associated with age (OR 1.039, 1.012-1.066), activities of daily living (ADL) score (OR 2.713, 1.818-4.048), the number of prescribed medications (<5: OR 1; 5-9: OR 2.704, 1.524-4.795; ≥10: OR 3.075, 1.704-5.549) and Charlson Comorbidity Index (OR 1.302, 1.110-1.529). WHAT IS NEW AND CONCLUSION: This study showed a high prevalence of PIMs/PPOs in aged internal medical ward inpatients in China, which was associated with various correlates. The STOPP/START v2 had a higher detection rate than v1.

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