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1.
J Ethnopharmacol ; 329: 118061, 2024 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-38614265

RESUMEN

ETHNOPHARMACOLOGICAL RELEVANCE: Fangji Huangqi Decoction (FHD) is frequently prescribed for the clinical treatment of wind-cold and wind-dampness pathogenic superficial deficiency syndrome. It also has a notable curative effect on rheumatoid arthritis (RA). AIM OF THE STUDY: The study aimed to explore the possible mechanism of FHD against RA and provided a theoretical basis for alternative therapies for RA. MATERIALS AND METHODS: We used UPLC-Q-TOF-MS to analysis the ingredients and absorbed blood components of FHD. At the same time, the collagen-induced arthritis (CIA) rat model was established to estimate the therapeutic effects on FHD by considering body weight, arthritis score, paw swelling, autonomous movement ability, and synovial microvessel counts. Subsequently, immunofluorescence, immunohistochemistry, and Western blot were employed to detect the anti-angiogenic capacity of FHD in vivo, as well as the levels of apoptosis and autophagy in the synovial tissue. In addition, flow cytometry and Western blot were used to assess the effects of FHD on apoptosis and autophagy in MH7A cells. The effects of FHD on the proliferation and migration of MH7A cells were measured by CCK8 assay, cell migration and, invasion experiments. Finally, a tube formation assay was performed to evaluate the angiogenic capacity of FHD in co-cultures of MH7A cells and HUVEC cells. RESULTS: Through testing of FHD's original formula, a total of 26 active ingredients have been identified, with 17 of them being absorbed into the bloodstream. FHD significantly improved the pathological symptoms and synovial hyperplasia of CIA rats. FHD could suppress the expression of HIF-1α, promote apoptosis in CIA rat synovial tissue, and suppress autophagy and angiogenesis. In vitro experiments showed that serum containing FHD inhibited the proliferation, migration, and invasion of MH7A cells, and also suppressed the expression of autophagy-related proteins while promoting apoptosis. FHD markedly repressed the expression of HIF-1α protein in TNF-α-stimulated MH7A cells and inhibited the tube formation capacity induced by MH7A cells in HUVEC cells. CONCLUSIONS: The study had proven that FHD played an excellent anti-RA role, which may be attributed to its potential mechanism of regulating the balance between autophagy and apoptosis in RA FLS by suppressing the HIF-1α, thus contributing to its anti-angiogenic activities.


Asunto(s)
Apoptosis , Artritis Experimental , Artritis Reumatoide , Autofagia , Medicamentos Herbarios Chinos , Subunidad alfa del Factor 1 Inducible por Hipoxia , Neovascularización Patológica , Animales , Apoptosis/efectos de los fármacos , Medicamentos Herbarios Chinos/farmacología , Autofagia/efectos de los fármacos , Artritis Reumatoide/tratamiento farmacológico , Artritis Experimental/tratamiento farmacológico , Artritis Experimental/patología , Ratas , Masculino , Humanos , Subunidad alfa del Factor 1 Inducible por Hipoxia/metabolismo , Neovascularización Patológica/tratamiento farmacológico , Línea Celular , Movimiento Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Células Endoteliales de la Vena Umbilical Humana/efectos de los fármacos , Membrana Sinovial/efectos de los fármacos , Membrana Sinovial/metabolismo , Antirreumáticos/farmacología , Angiogénesis
2.
Cancer Lett ; 589: 216828, 2024 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-38521199

RESUMEN

5-Fluorouracil (5-FU) resistance has always been a formidable obstacle in the adjuvant treatment of advanced colorectal cancer (CRC). In recent years, long non-coding RNAs have emerged as key regulators in various pathophysiological processes including 5-FU resistance. TRG is a postoperative pathological score of the chemotherapy effectiveness for CRC, of which TRG 0-1 is classified as chemotherapy sensitivity and TRG 3 as chemotherapy resistance. Here, RNA-seq combined with weighted gene correlation network analysis confirmed the close association of GAS6-AS1 with TRG. GAS6-AS1 expression was positively correlated with advanced clinicopathological features and poor prognosis in CRC. GAS6-AS1 increased the 50% inhibiting concentration of 5-FU, enhanced cell proliferation and accelerated G1/S transition, both with and without 5-FU, both in vitro and in vivo. Mechanistically, GAS6-AS1 enhanced the stability of MCM3 mRNA by recruiting PCBP1, consequently increasing MCM3 expression. Furthermore, PCBP1 and MCM3 counteracted the effects of GAS6-AS1 on 5-FU resistance. Notably, the PDX model indicated that combining chemotherapeutic drugs with GAS6-AS1 knockdown yielded superior outcomes in vivo. Together, our findings elucidate that GAS6-AS1 directly binds to PCBP1, enhancing MCM3 expression and thereby promoting 5-FU resistance. GAS6-AS1 may serve as a robust biomarker and potential therapeutic target for combination therapy in CRC.


Asunto(s)
Neoplasias Colorrectales , MicroARNs , ARN Largo no Codificante , Humanos , Fluorouracilo/farmacología , Fluorouracilo/uso terapéutico , ARN Largo no Codificante/metabolismo , MicroARNs/genética , Proliferación Celular , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/genética , Neoplasias Colorrectales/patología , Regulación Neoplásica de la Expresión Génica , Línea Celular Tumoral , Componente 3 del Complejo de Mantenimiento de Minicromosoma/genética , Componente 3 del Complejo de Mantenimiento de Minicromosoma/metabolismo , Proteínas de Unión al ADN/genética , Proteínas de Unión al ADN/metabolismo , Proteínas de Unión al ARN/genética , Proteínas de Unión al ARN/metabolismo
3.
J. physiol. biochem ; 80(1): 235-247, Feb. 2024. ilus, graf
Artículo en Inglés | IBECS | ID: ibc-EMG-580

RESUMEN

Both exercise and metformin are common effective clinical treatments of type 2 diabetic mellitus. This study investigated the functional role of exercise, metformin, and combination treatment on type 2 diabetic mellitus–induced muscle atrophy. In this experiment, a total of 10 BKS mice were set as the control group. A total of 40 BKS-db/db mice were randomly divided into the control group (db/db); the exercise intervention group (db/db + Ex), which ran on a treadmill at 7–12 m/min, 30–40 min/day, 5 days/week; the metformin administration group (db/db + Met), which was administered 300 mg/kg of metformin solution by gavage daily; and the exercise combined with metformin administration group (db/db + Ex + Met). After 8 weeks of intervention, their tibialis anterior muscles were removed. The levels of insulin signaling pathway proteins, ubiquitin proteasome, and autophagic lysosome–associated proteins were detected using western blot, the expression of MuRF1 and Atrogin-1 was detected using immunohistochemical staining, and the degradation of autophagosomes was detected using double-labeled immunofluorescence. The db/db mice exhibited reduced insulin sensitivity and inhibition of the autophagic–lysosome system, the ubiquitin–proteasome system was activated, and protein degradation was exacerbated, leading to skeletal muscle atrophy. Exercise and metformin and their combined interventions can increase insulin sensitivity, whereas exercise alone showed more effective in inhibiting the ubiquitin–proteasome system, improving autophagy levels, and alleviating skeletal muscle atrophy. Compared with metformin, exercise demonstrated superior improvement of muscle atrophy by promoting the synthesis and degradation of autophagy through the AMPK/ULK1 pathway. However, the combination treatment exhibits no synergistic effect on muscle atrophy. (AU)


Asunto(s)
Animales , Ratones , Diabetes Mellitus Tipo 2/complicaciones , Atrofia Muscular , Ejercicio Físico , Metformina , Autofagia , Inhibidores de Proteasoma
4.
Fitoterapia ; 173: 105780, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38135092

RESUMEN

In this study, 16 new ent-labdane-type diterpene glycosides, designated as goshonosides J1-J16 (1-16), along with nine previously known diterpene glycosides (17-25) were extracted from the fruits of Rubus chingii Hu. The structures of goshonosides J1-J16 were elucidated using various analytical techniques, such as nuclear magnetic resonance, electron capture detector ECD, high-resolution electrospray ionization mass spectrometry HREIMS, single-crystal X-ray diffraction, and hydrolysis. Furthermore, the isolates' efficacy in inhibiting the activity of phosphodiesterase type 5 A was evaluated. Goshonosides J1, J2, and G effectively inhibited the activity of the aforementioned enzyme (IC50 values: 6.15 ± 1.76, 3.27 ± 0.65, and 9.61 ± 2.36 µM, respectively). Our findings highlight the remarkable structural diversity of bioactive compounds in R. chingii Hu and offer insights into the use of this shrub.


Asunto(s)
Diterpenos , Rubus , Rubus/química , Estructura Molecular , Glicósidos/farmacología , Glicósidos/química , Fosfodiesterasas de Nucleótidos Cíclicos Tipo 5 , Diterpenos/farmacología
5.
Biotechnol J ; 18(8): e2200634, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37191095

RESUMEN

The sebaceous gland is a neuro-immuno-endocrine organ responsible for maintaining regular skin functions. Overdose exposure of UV and visible light (e.g., blue light) can cause sebocyte gland function disorders or even different diseases (e.g., chronic actinic dermatitis). Studying the mechanism of light-induced damage in sebaceous glands has been challenging, since ex vivo culture of sebaceous glands is difficult due to its short life in culture medium. To address this issue, a versatile 3D artificial sebocyte gland model was established using the inertial focusing effect for studying the impact of light damage and screening potential drugs. The artificial sebocyte gland exhibited specific biological function and structure similar to natural sebocyte glands. Using this artificial sebocyte gland, the interactions between the artificial organ and blue light or UV were studied. The results indicated that UV and blue light upregulated lipid secretion and downregulated cell viability within the sebocytes. Light damage intensified oxidative stress and promoted pro-inflammation cytokines (i.e., IL-1ß and TNF-α) production in the artificial sebocytes. Additionally, the therapeutic effects of cannabidiol, a clinically tested drug for treating acne, was also indicated on restoring light damaged sebaceous gland functions. These results indicate that the 3D artificial sebocyte gland could be a versatile, fast, and low-cost platform for skincare studies or drug screening.


Asunto(s)
Células Epiteliales , Glándulas Sebáceas , Evaluación Preclínica de Medicamentos , Expresión Génica , Citocinas
6.
Burns Trauma ; 10: tkac014, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35611318

RESUMEN

Acute and chronic wound infection has become a major worldwide healthcare burden leading to significantly high morbidity and mortality. The underlying mechanism of infections has been widely investigated by scientist, while standard wound management is routinely been used in general practice. However, strategies for the diagnosis and treatment of wound infections remain a great challenge due to the occurrence of biofilm colonization, delayed healing and drug resistance. In the present review, we summarize the common microorganisms found in acute and chronic wound infections and discuss the challenges from the aspects of clinical diagnosis, non-surgical methods and surgical methods. Moreover, we highlight emerging innovations in the development of antimicrobial peptides, phages, controlled drug delivery, wound dressing materials and herbal medicine, and find that sensitive diagnostics, combined treatment and skin microbiome regulation could be future directions in the treatment of wound infection.

7.
J Ethnopharmacol ; 292: 115241, 2022 Jun 28.
Artículo en Inglés | MEDLINE | ID: mdl-35351575

RESUMEN

ETHNOPHARMACOLOGICAL RELEVANCE: Zhibai Dihuang Granule (ZDG) is known as traditional Chinese patent medicine with the functions of "Ziyin decrease internal heat" in Traditional Chinses medicine. In clinical, it is also used to treat various kidney diseases. AIM OF THE STUDY: We aimed to provide a basis for the curative effect of ZDG on acute kidney injury induced by cisplatin (CIAKI). MATERIALS AND METHODS: The active compounds and protein targets of ZDG, as well as the potential targets of the CIAKI were searched from the database. The protein-protein interaction (PPI) network diagram and the drug-compounds-targets-disease network were constructed. Enrichment analysis was performed by Gene Ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG). Subsequently, the effect of ZDG on the prevention and treatment of CIAKI was experimentally validated in vivo and in vitro. RESULTS: From the database, we screened 22 active compounds of ZDG and 226 related targets. We obtained 498 gene targets related to CIAKI, among which 40 genes overlapped with ZDG-related targets. Go enrichment and KEGG analysis got 339 terms and 64 pathways, respectively. Based on the above study, we speculated that ZDG has the potential effect on treatment CIAKI, and the mechanism may be related to cell apoptosis and inflammation. The results in vitro experiments showed that ZDG reduced the cytotoxicity of cisplatin to HK-2 and 293T cells, but did not affect the antitumor effect of cisplatin. Moreover, in vivo experiments further proved that ZDG effectively controlled kidney damage caused by cisplatin in SD rats. The results showed that ZDG could regulate the expression of CASP3, p65 and MAPK pathway related proteins, suggesting that ZDG's prevention of CIAKI may be related to apoptosis and inflammatory response. CONCLUSIONS: Our study showed that ZDG could prevent and treat CIAKI by inhibiting cell apoptosis and inflammation, which provided a new efficacy and clinical application for ZDG.


Asunto(s)
Lesión Renal Aguda , Medicamentos Herbarios Chinos , Lesión Renal Aguda/inducido químicamente , Lesión Renal Aguda/tratamiento farmacológico , Animales , Cisplatino/toxicidad , Medicamentos Herbarios Chinos/farmacología , Medicamentos Herbarios Chinos/uso terapéutico , Femenino , Humanos , Inflamación/tratamiento farmacológico , Masculino , Medicina Tradicional China/métodos , Simulación del Acoplamiento Molecular , Farmacología en Red , Ratas , Ratas Sprague-Dawley
8.
Mol Nutr Food Res ; 66(8): e2100943, 2022 04.
Artículo en Inglés | MEDLINE | ID: mdl-35106903

RESUMEN

SCOPE: Curcumin is a natural polyphenol compound with multiple pharmacologic activities. The present study aims to explore the potential therapeutic properties of curcumin on intestinal inflammatory diseases, including its anti-inflammatory, antioxidant, and anti-apoptotic properties, as well as their associations with altered intestinal microbiome. METHODS AND RESULTS: DSS, i.e., Dextran Sulfate Sodium, (3%) is administered to C57BL/6J mice in the drinking water daily for 6 days in DSS and curcumin groups. Then, mice in curcumin groups are orally administered with 50 or 150 mg kg-1 curcumin for 7 days. On day 13, mice are sacrificed. Results show that oral administration with curcumin relieves macroscopic pathological manifestations, e.g., colon length and histological change. Moreover, it enhances intestinal barrier via increasing expression of tight junction proteins, e.g., occludin, ZO-1, claudin-3; alleviates DSS-induced intestinal apoptosis via suppressing caspase-3 pathway; mitigates intestinal inflammation via inhibiting the MAPK/NFκB/STAT3 pathway. It is also noticed that curcumin is beneficial for modulating abundance of some specific bacteria, including Akkermansia, Coprococcus, Roseburia, and Turicibacter, as well as families such as F16, Enterococcaceae, and Aerococcaceae. Most of the altered bacteria by curcumin are highly correlated with colitis-associated parameters. CONCLUSION: Curcumin shows therapeutic potential against colitis. It may be served as an alternative medicine or adjuvant therapy in the treatment of colitis.


Asunto(s)
Colitis , Curcumina , Microbioma Gastrointestinal , Animales , Bacterias , Colitis/inducido químicamente , Colitis/tratamiento farmacológico , Colitis/metabolismo , Colon/metabolismo , Curcumina/metabolismo , Curcumina/farmacología , Sulfato de Dextran/toxicidad , Modelos Animales de Enfermedad , Humanos , Mucosa Intestinal/metabolismo , Ratones , Ratones Endogámicos C57BL
9.
Langmuir ; 38(4): 1360-1367, 2022 02 01.
Artículo en Inglés | MEDLINE | ID: mdl-35060743

RESUMEN

An effective accumulation of the photosensitive drugs in the target tissues is a vital prerequisite for obtaining the optimal photodynamic or photothermal treatment effects during the lung cancer treatment. In this study, porous Fe3O4 nanoparticles were used to efficiently load the near-infrared photosensitive drug indocyanine green (ICG) in the pores (denoted as Fe/ICG) by electrostatic adsorption. Subsequently, Fe/ICG was modified with hyaluronic acid (HA) to construct a novel target nanoprobe (denoted as Fe/ICG@HA). Fe/ICG@HA exhibited not only excellent ICG loading and stability but also a significant uptake by the lung cancer cells owing to the targeting characteristics. Meanwhile, the nanoprobe improved the efficiency of thermal conversion and generation of singlet oxygen, thereby resulting in an optimal photothermal/photodynamic therapy effect. Based on the in vivo experiments and T2-magnetic resonance (MR) imaging, the nanoprobe was confirmed to possess excellent tumor-targeting abilities. Furthermore, under 808 nm laser irradiation, a significant therapeutic effect was observed on the tumor growth in the animal models. The proposed treatment strategy may provide a functional pathway for the targeted combined photothermal/photodynamic lung cancer therapy.


Asunto(s)
Neoplasias Pulmonares , Nanopartículas , Fotoquimioterapia , Animales , Línea Celular Tumoral , Ácido Hialurónico , Verde de Indocianina/farmacología , Neoplasias Pulmonares/diagnóstico por imagen , Neoplasias Pulmonares/tratamiento farmacológico , Fototerapia/métodos
10.
Chemosphere ; 294: 133536, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-34999101

RESUMEN

Discharge of decentralized livestock wastewater without effective treatment has become a common problem in rural areas, threatening the regional water environment. A new microcurrent-assisted multi-soil-layering (MSL) system was developed for treating rural decentralized livestock wastewater. The results showed the highest removal rates of chemical oxygen demand (COD) and total phosphorus (TP) in MSL systems reached 95.45% and 92.0%, respectively. The removal rate of total nitrogen (TN) in MSL systems ranged from 60 to 75%. The bacterial diversity changes among MSL systems showed that high-level height of bottom submergence had a positive effect on the abundance of denitrifying bacteria, while low-level height of bottom submergence had a positive impact on the abundance of nitrifying bacteria. The effect of low-level external voltage on bacterial abundance was better than that of high-level external voltage. Both high- and low-level influent C/N ratios had no significant effect on bacterial abundance. The metabolism and activity of microorganisms were promoted with microcurrent stimulation from the perspective of increased bacterial abundance in MSL systems with improved treatment performance.


Asunto(s)
Suelo , Aguas Residuales , Animales , Análisis de la Demanda Biológica de Oxígeno , Ganado , Nitrógeno/análisis , Fósforo/análisis , Suelo/química , Eliminación de Residuos Líquidos , Aguas Residuales/química
11.
Autophagy ; 18(8): 1879-1897, 2022 08.
Artículo en Inglés | MEDLINE | ID: mdl-34890308

RESUMEN

Mitophagy is a type of selective macroautophagy/autophagy that degrades dysfunctional or excessive mitochondria. Regulation of this process is critical for maintaining cellular homeostasis and has been closely implicated in acquired drug resistance. However, the regulatory mechanisms and influences of mitophagy in cancer are still unclear. Here, we reported that inhibition of CDK9 blocked PINK1-PRKN-mediated mitophagy in HCC (hepatocellular carcinoma) by interrupting mitophagy initiation. We demonstrated that CDK9 inhibitors promoted dephosphorylation of SIRT1 and promoted FOXO3 protein degradation, which was regulated by its acetylation, leading to the transcriptional repression of FOXO3-driven BNIP3 and impairing the BNIP3-mediated stability of the PINK1 protein. Lysosomal degradation inhibitors could not rescue mitophagy flux blocked by CDK9 inhibitors. Thus, CDK9 inhibitors inactivated the SIRT1-FOXO3-BNIP3 axis and PINK1-PRKN pathway to subsequently block mitophagy initiation. Moreover, CDK9 inhibitors facilitated mitochondrial dysfunction. The dual effects of CDK9 inhibitors resulted in the destruction of mitochondrial homeostasis and cell death in HCC. Importantly, a novel CDK9 inhibitor, oroxylin A (OA), from Scutellaria baicalensis was investigated, and it showed strong therapeutic potential against HCC and a striking capacity to overcome drug resistance by downregulating PINK1-PRKN-mediated mitophagy. Additionally, because of the moderate and controlled inhibition of CDK9, OA not led to extreme repression of general transcription and appeared to overcome the inconsistent anti-HCC efficacy and high normal tissue toxicity that was associated with existing CDK9 inhibitors. All of the findings reveal that mitophagy disruption is a promising strategy for HCC treatment and OA is a potential candidate for the development of mitophagy inhibitors.Abbreviations: BNIP3: BCL2 interacting protein 3; CCCP: carbonyl cyanide p-trichloromethoxy-phenylhydrazone; CDK9: cyclin dependent kinase 9; CHX: cycloheximide; CQ, chloroquine; DFP: deferiprone; DOX: doxorubicin; EBSS: Earle's balanced salt solution; E64d: aloxistatin; FOXO3: forkhead box O3; HCC: hepatocellular carcinoma; HepG2/ADR: adriamycin-resistant HepG2 cells; MMP: mitochondrial membrane potential; mito-Keima: mitochondria-targeted and pH-sensitive fluorescent protein; MitoSOX: mitochondrial reactive oxygen species; OA: oroxylin A; PB: phosphate buffer; PDX: patient-derived tumor xenograft; PINK1: PTEN induced kinase 1; POLR2A: RNA polymerase II subunit A; p-POLR2A-S2: Ser2 phosphorylation of RNA polymerase II subunit A; PRKN: parkin RBR E3 ubiquitin protein ligase; SIRT1: sirtuin 1.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Autofagia , Carcinoma Hepatocelular/patología , Quinasa 9 Dependiente de la Ciclina/metabolismo , Proteína Forkhead Box O3 , Humanos , Neoplasias Hepáticas/metabolismo , Proteínas de la Membrana/metabolismo , Mitocondrias/metabolismo , Mitofagia/genética , Proteínas Quinasas/metabolismo , Proteínas Proto-Oncogénicas/metabolismo , ARN Polimerasa II/metabolismo , ARN Polimerasa II/farmacología , Sirtuina 1/metabolismo , Ubiquitina-Proteína Ligasas/metabolismo
12.
J Plant Physiol ; 265: 153493, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-34403886

RESUMEN

As members of the pathogenesis-related protein (PR)-2 family, ß-1,3-glucanases play pivotal roles in plant defense. Previous study showed that the rice genome contains 16 genes encoding putative ß-1,3-glucanases, and the ß-1,3-glucanases in subfamily A were deduced to be involved in plant defense. However, there was limited direct evidence. In this study, the expression of rice ß-1,3-glucanases Gns2-Gns6 belonging to subfamily A in rice plant infection with Magnaporthe oryzae was investigated, and the enhanced expression of Gns6 during infection confirmed its crucial role in the defense of rice seedlings. Enzymological characterization revealed that Gns6 preferentially hydrolyzed laminarin, pachymaran, and yeast glucan. The ß-1,3; 1,6-glucanase Gns6 exhibited a specific activity of 1.2 U/mg with laminarin as the substrate. In addition, Gns6 could hydrolyze laminarin via an endo-type mechanism, yielding a series of oligosaccharides with various degrees of polymerization that are known immune elicitors in plants. Moreover, Gns6 exhibited a significant inhibitory effect against the formation of the germ tubes and appressoria, with potential applications in plant protection. Taken together, this study shows that Gns6 is an essential effector in the defensive response of rice against pathogenic fungi.


Asunto(s)
Antifúngicos/farmacocinética , Magnaporthe/efectos de los fármacos , Oryza/química , Oryza/genética , Enfermedades de las Plantas/prevención & control , Extractos Vegetales/genética , Extractos Vegetales/metabolismo , Extractos Vegetales/farmacocinética , Regulación de la Expresión Génica de las Plantas , Genes de Plantas
13.
Antimicrob Resist Infect Control ; 10(1): 16, 2021 01 18.
Artículo en Inglés | MEDLINE | ID: mdl-33461617

RESUMEN

BACKGROUND: Bloodstream infection (BSI) caused by multidrug-resistant Acinetobacter baumannii (MDR-AB) has been increasingly observed among hospitalized patients. The following study analyzed the epidemiology and microbiological characteristics of MDR-AB, as well as the clinical features, antimicrobial treatments, and outcomes in patients over a six years period in China. METHODS: This retrospective study was conducted in a large tertiary hospital in China between January 2013 and December 2018. The clinical and microbiological data of all consecutive hospitalized patients with MDR-AB induced bloodstream infection were included and analyzed. RESULTS: A total of 108 BSI episodes were analyzed. All MDR isolates belonged to ST2, a sequence type that has spread all over the world. Overall, ST2 strains showed strong biofilm formation ability, high serum resistance, and high pathogenicity. As for the clinical characteristics of the patient, 30-day mortality was 69.4% (75/108). The three main risk factors included mechanical ventilation, intensive care unit (ICU) stay, and thrombocytopenia; three protective factors included a change of antimicrobial regimen within 48 h after positive blood culture, use of the antibacterial agent combination, and more inpatient days. The most effective antibacterial regimen was the combination of cefoperazone/sulbactam and tigecycline. CONCLUSIONS: BSI caused by ST2 A.baumannii represents a difficult challenge for physicians, considering the high mortality associated with this infection. The combination of cefoperazone/sulbactam and tigecycline may be an effective treatment option.


Asunto(s)
Infecciones por Acinetobacter/tratamiento farmacológico , Antibacterianos/uso terapéutico , Farmacorresistencia Bacteriana Múltiple , Sepsis/tratamiento farmacológico , Virulencia , Infecciones por Acinetobacter/epidemiología , Acinetobacter baumannii/patogenicidad , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Cefoperazona , China/epidemiología , Infección Hospitalaria/tratamiento farmacológico , Infección Hospitalaria/epidemiología , Femenino , Mortalidad Hospitalaria , Humanos , Unidades de Cuidados Intensivos , Masculino , Pruebas de Sensibilidad Microbiana , Persona de Mediana Edad , Respiración Artificial , Estudios Retrospectivos , Factores de Riesgo , Sepsis/microbiología , Sulbactam , Trombocitopenia , Tigeciclina , Adulto Joven
14.
Stem Cell Res Ther ; 12(1): 45, 2021 01 07.
Artículo en Inglés | MEDLINE | ID: mdl-33413663

RESUMEN

BACKGROUND: Age-related bone loss plays a vital role in the development of osteoporosis and osteoporotic fracture. Bone marrow stromal cell (BMSC) senescence is highly associated with osteoporosis and limits the application of BMSCs in regenerative medicine. Hypoxia is an essential component for maintaining the normal physiology of BMSCs. We have reported that activation of hypoxia-induced factor by deletion of von Hippel-Lindau gene in osteochondral progenitor cells protected mice from aging-induced bone loss. However, whether pharmacologically manipulation of hypoxic niche would attenuate age-related bone loss and dysfunction of BMSCs is not well understood. METHODS: Twelve-month-old Sprague-Dawley rats were used as an aged model and were intraperitoneally injected with Desferal® (20, 60 mg/kg weight or vehicle), three times a week for a continuous 8-week period. Two-month-old young rats were set as a reference. After 8 weeks, micro-CT and HE staining were performed to determine the effect of Desferal® on bone loss. In order to investigate the effects of Desferal® on BMSC senescence, 12-month-old rats were treated with high-dose Desferal® (60 mg/kg weight) daily for 10 days. BMSCs were isolated and evaluated using CCK-8 assay, colony-forming cell assay, cell differentiation assay, laser confocal for reactive oxygen species (ROS) level, senescence-associated ß-galactosidase (SA-ß-gal) staining, and molecular expression test for stemness/senescence-associated genes. RESULTS: Micro-CT and HE staining showed that high-dose Desferal® significantly prevented bone loss in aged rats. Compared with vehicle group, the ex vivo experiments showed that short-term Desferal® administration could promote the potential of BMSC growth (proliferation and colony formation ability) and improve the rebalance of osteogenic and adipogenic differentiation, as well as rejuvenate senescent BMSCs (ROS level and SA-ß-gal staining) and revise the expression of stemness/senescence-associated genes. The potential of BMSCs from 12M-H-Desferal® group at least partly revised to the level close to 2-month-old group. CONCLUSIONS: The current study suggested that Desferal®, an iron-chelating agent, could alleviate age-related bone loss in middle-aged rats. Meanwhile, we found that short-term intraperitoneal injection of Desferal® partly rejuvenate BMSCs from aged rats. Overall, we demonstrated a novel role of Desferal® in rejuvenating aged BMSCs and preventing age-related bone loss.


Asunto(s)
Células Madre Mesenquimatosas , Osteoporosis , Animales , Células de la Médula Ósea , Diferenciación Celular , Células Cultivadas , Senescencia Celular , Deferoxamina , Inyecciones Intraperitoneales , Ratones , Osteogénesis , Ratas , Ratas Sprague-Dawley
15.
Water Res ; 187: 116437, 2020 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-33002773

RESUMEN

This study presents an approach for eutrophication evaluation based on the technique for order preference by similarity to an ideal solution (TOPSIS) method and Monte Carlo simulation (MCS). The MCS is employed to produce a normally distributed dataset based on the observed data while the TOPSIS method and membership function are used to evaluate the level of eutrophication. Herein, a eutrophication problem in Lake Erhai is evaluated to check the performance of the proposed approach. The evaluation results were consistent with the real situation when the coefficient P in the membership function is equal to 1. Moreover, the developed approach is able to (i) deal with evaluation items with inherent fuzziness and uncertainties, (ii) improve the reliability of evaluation results via MCS, and (iii) raise the tolerance to errors in measured data. A global sensitivity analysis indicated that the potassium permanganate index (CODMn) and Secchi disc (SD) are the most sensitive factors in the developed approach. Finally, a range for the coefficient P value in the membership function was recommended.


Asunto(s)
Lagos , Fósforo , China , Eutrofización , Método de Montecarlo , Nitrógeno/análisis , Fósforo/análisis , Reproducibilidad de los Resultados
16.
Acta Pharmacol Sin ; 41(9): 1167-1177, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32737471

RESUMEN

Human infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes coronavirus disease 2019 (COVID-19) and there is no cure currently. The 3CL protease (3CLpro) is a highly conserved protease which is indispensable for CoVs replication, and is a promising target for development of broad-spectrum antiviral drugs. In this study we investigated the anti-SARS-CoV-2 potential of Shuanghuanglian preparation, a Chinese traditional patent medicine with a long history for treating respiratory tract infection in China. We showed that either the oral liquid of Shuanghuanglian, the lyophilized powder of Shuanghuanglian for injection or their bioactive components dose-dependently inhibited SARS-CoV-2 3CLpro as well as the replication of SARS-CoV-2 in Vero E6 cells. Baicalin and baicalein, two ingredients of Shuanghuanglian, were characterized as the first noncovalent, nonpeptidomimetic inhibitors of SARS-CoV-2 3CLpro and exhibited potent antiviral activities in a cell-based system. Remarkably, the binding mode of baicalein with SARS-CoV-2 3CLpro determined by X-ray protein crystallography was distinctly different from those of known 3CLpro inhibitors. Baicalein was productively ensconced in the core of the substrate-binding pocket by interacting with two catalytic residues, the crucial S1/S2 subsites and the oxyanion loop, acting as a "shield" in front of the catalytic dyad to effectively prevent substrate access to the catalytic dyad within the active site. Overall, this study provides an example for exploring the in vitro potency of Chinese traditional patent medicines and effectively identifying bioactive ingredients toward a specific target, and gains evidence supporting the in vivo studies of Shuanghuanglian oral liquid as well as two natural products for COVID-19 treatment.


Asunto(s)
Betacoronavirus/efectos de los fármacos , Infecciones por Coronavirus , Medicamentos Herbarios Chinos , Flavanonas , Flavonoides , Pandemias , Neumonía Viral , Replicación Viral/efectos de los fármacos , Administración Oral , Animales , Antivirales/química , Antivirales/farmacología , Betacoronavirus/fisiología , COVID-19 , Chlorocebus aethiops , Infecciones por Coronavirus/tratamiento farmacológico , Infecciones por Coronavirus/virología , Medicamentos Herbarios Chinos/química , Medicamentos Herbarios Chinos/farmacología , Pruebas de Enzimas , Flavanonas/química , Flavanonas/farmacocinética , Flavonoides/química , Flavonoides/farmacocinética , Humanos , Neumonía Viral/tratamiento farmacológico , Neumonía Viral/virología , SARS-CoV-2 , Células Vero , Replicación Viral/fisiología
17.
BMC Microbiol ; 20(1): 203, 2020 07 09.
Artículo en Inglés | MEDLINE | ID: mdl-32646366

RESUMEN

BACKGROUND: Pseudomonas aeruginosa is the most common Gram-negative pathogen responsible for chronic wound infections, such as diabetic foot infections, and further exacerbates the treatment options and cost of such conditions. Hypertonic glucose, a commonly used prolotherapy solution, can accelerate the proliferation of granulation tissue and improve microcirculation in wounds. However, the action of hypertonic glucose on bacterial pathogens that infect wounds is unclear. In this study, we investigated the inhibitory effects of hypertonic glucose on multidrug-resistant P. aeruginosa strains isolated from diabetic foot infections. Hypertonic glucose represents a novel approach to control chronic wound infections caused by P. aeruginosa. RESULTS: Four multidrug-resistant P. aeruginosa clinical strains isolated from diabetic foot ulcers from a tertiary hospital in China and the reference P. aeruginosa PAO1 strain were studied. Hypertonic glucose significantly inhibited the growth, biofilm formation, and swimming motility of P. aeruginosa clinical strains and PAO1. Furthermore, hypertonic glucose significantly reduced the production of pyocyanin and elastase virulence factors in P. aeruginosa. The expression of major quorum sensing genes (lasI, lasR, rhlI, and rhlR) in P. aeruginosa were all downregulated in response to hypertonic glucose treatment. In a Galleria mellonella larvae infection model, the administration of hypertonic glucose was shown to increase the survival rates of larvae infected by P. aeruginosa strains (3/5). CONCLUSIONS: Hypertonic glucose inhibited the growth, biofilm formation, and swimming motility of P. aeruginosa, as well as reduced the production of virulence factors and quorum sensing gene expression. Further studies that investigate hypertonic glucose therapy should be considered in treating chronic wound infections.


Asunto(s)
Farmacorresistencia Bacteriana Múltiple/efectos de los fármacos , Solución Hipertónica de Glucosa/farmacología , Pseudomonas aeruginosa/crecimiento & desarrollo , Factores de Virulencia/genética , Proteínas Bacterianas/genética , Biopelículas/efectos de los fármacos , China , Pie Diabético/microbiología , Regulación Bacteriana de la Expresión Génica/efectos de los fármacos , Humanos , Pruebas de Sensibilidad Microbiana , Viabilidad Microbiana/efectos de los fármacos , Elastasa Pancreática/genética , Pseudomonas aeruginosa/genética , Pseudomonas aeruginosa/aislamiento & purificación , Pseudomonas aeruginosa/patogenicidad , Piocianina/genética , Percepción de Quorum , Centros de Atención Terciaria
18.
Res Vet Sci ; 130: 230-236, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32224352

RESUMEN

Houhai acupoint (HA) is a site for acupuncture stimulation, located in the fossa between the anus and tail base in animals. To evaluate HA as a potential immunization site, the immune responses were compared when HA and the conventional site nape were vaccinated in rats. The results showed that injection of a porcine epidemic diarrhea virus (PEDV) vaccine in HA induced significantly higher IgG, IgG1, IgG2, splenocyte proliferation and mRNA expression of IL-2, IL-4 and IFN-γ than in the nape. To search for the underlying mechanisms, the draining lymph nodes for HA and the nape were investigated. When rats were injected in HA with Indian ink, 11 lymph nodes including caudal mesenteric lymph node and bilateral gluteal lymph nodes, posterior inguinal lymph nodes, lumbar lymph nodes, internal iliac lymph nodes and popliteal lymph nodes were visibly stained with the ink and injection of a model antigen ovalbumin (OVA) in HA resulted in detection of OVA by western blotting while in the same lymph nodes only a pair of lymph nodes (central brachial lymph nodes) were observed when Indian ink or OVA was injected in the nape. IL-2 mRNA expression was detected in all the lymph nodes when PEDV vaccine was injected. Therefore, the enhanced immune response elicited by vaccination in HA may be attributed to more lymphocytes activated.


Asunto(s)
Puntos de Acupuntura , Inmunidad Celular/efectos de los fármacos , Ganglios Linfáticos/fisiopatología , Linfocitos/inmunología , Vacunación/veterinaria , Animales , Femenino , Ratas , Ratas Sprague-Dawley
19.
Zhongguo Zhong Yao Za Zhi ; 45(24): 6012-6019, 2020 Dec.
Artículo en Chino | MEDLINE | ID: mdl-33496142

RESUMEN

The study aimed to investigate the effect and mechanism of aspirin combined with vinorelbine on the proliferation and apoptosis of non-small cell lung cancer cells. 3-(4-dimethylthiazolyl-2)-2-diphenyltetrazolium bromide(MTT) was used to detect the cytotoxic effect of aspirin and vinorelbine on H460 and A549 cells, and half of inhibitory concentration(IC_(50)) value of drugs as well as synergistic effect were calculated. The results showed that both aspirin and vinorelbine inhibited the cancer cells proliferation by a concentration-dependent manner with IC_(50 )values of 1.553 mmol·L~(-1) and 0.033 µmol·L~(-1) in H460 cells, respectively. The IC_(50 )values of aspirin and vinorelbine were 1.70 mmol·L~(-1)and more than 20 µmol·L~(-1) in A549 cells. The combination index(CI) value was used to evaluate the combined effect of two drugs. Aspirin combined with vinorelbine had synergistic effects at the ratio of 100∶1 on H460 cells and 1∶10 on A549 cells(CI<1). Clone formation and 4',6-diamidino-2-phenylindole(DAPI)/propidium iodide(PI) staining assays were used to verify the effect of the combination of two drugs on proliferation of H460 cells. Compared with the aspirin single group, the combination group had stronger inhibitory effect on the proliferation of H460 cells and the clone formation rate was 49.5%(P<0.05). Furthermore, apoptosis, mitochondrial membrane potential, reactive oxygen species and Western blot experiments were used to explore the synergistic mechanism of aspirin combined with vinorelbine in inhibiting cell proliferation. The results showed that the cancer cell apoptosis rate was 52.8%, the mitochondrial membrane potential was decreased to 33.1%, and the levels of reactive oxygen species was increased to 73.3% in combination group, which were significantly different from those of the single drug treatment groups(P<0.05). Western blot showed that combination group significantly up-regulated the expressions of Bax, p53, cleaved caspase-3 and cytochrome C, while down-regulated the expression of anti-apoptosis proteins such as Bcl-xL and Bcl-2 when compared with single groups. Our results suggested that aspirin combined with vinorelbine could synergistically inhibit the proliferation of H460 cells by inducing the cell apoptosis through the mitochondrial pathway.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas , Neoplasias Pulmonares , Apoptosis , Aspirina , Línea Celular Tumoral , Proliferación Celular , Humanos , Vinorelbina
20.
J Zhejiang Univ Sci B ; 20(8): 679-686, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31273965

RESUMEN

OBJECTIVE: To evaluate the safety and effectiveness of eyelid margin cleaning using Deep Cleaning Device for the treatment of meibomian gland dysfunction-associated dry eye. METHODS: This was a prospective, randomized, open-label, investigator-masked, and self-controlled study. We randomly assigned one eye of patients with meibomian gland dysfunction-associated dry eye to the treatment group, and the other eye to the control group. Both groups received artificial tears and lid warming; the treatment group received an additional one-time in-office eyelid margin cleaning using Deep Cleaning Device. Non-invasive tear break-up time (NITBUT) and tear meniscus height (TMH) of each eye, and Standard Patient Evaluation for Eye Dryness II (SPEED II) score of each patient were evaluated before and at one week after treatment. RESULTS: Thirty eyes of 15 patients were enrolled. No adverse effects occurred during the treatment. Compared with the baseline values, the SPEED score decreased significantly at one week after treatment (mean±95% confidence interval, 11.00±0.99 vs. 5.67±1.67, P<0.0001), the NITBUT-first in the treatment group increased significantly at one week after treatment ((4.74±1.27) s vs. (7.49±2.22) s, P=0.01). The NITBUT-first was significantly longer in the treatment group ((7.49±2.22) s) than in the control group ((5.17±0.91) s) at one week after treatment (P=0.042). No significant differences were found in other tear film parameters between the two groups. CONCLUSIONS: Eyelid margin cleaning using the novel Deep Cleaning Device is a convenient, effective, and safe treatment for patients with meibomian gland dysfunction-associated dry eye.


Asunto(s)
Síndromes de Ojo Seco/terapia , Párpados/fisiopatología , Disfunción de la Glándula de Meibomio/terapia , Lágrimas , Adulto , Anciano , Femenino , Humanos , Hipertermia Inducida , Masculino , Persona de Mediana Edad , Estudios Prospectivos
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