BioTech最新文献

筛选
英文 中文
Production, Kinetic/Thermodynamic Study, and Evaluation of the Influence of Static Magnetic Field on Kinetic Parameters of β-Fructofuranosidase from Aspergillus tamarii Kita UCP 1279 Produced by Solid-State Fermentation. 柽柳曲霉UCP 1279固态发酵β-果糖糠醛苷酶的生产、动力学/热力学研究及静磁场对动力学参数影响的评价
BioTech Pub Date : 2023-03-03 DOI: 10.3390/biotech12010021
Rodrigo Lira de Oliveira, Aldeci França Araújo Dos Santos, Bianca Alencar Cardoso, Thayanne Samille da Silva Santos, Galba Maria de Campos-Takaki, Tatiana Souza Porto, Camila Souza Porto
{"title":"Production, Kinetic/Thermodynamic Study, and Evaluation of the Influence of Static Magnetic Field on Kinetic Parameters of β-Fructofuranosidase from <i>Aspergillus tamarii</i> Kita UCP 1279 Produced by Solid-State Fermentation.","authors":"Rodrigo Lira de Oliveira,&nbsp;Aldeci França Araújo Dos Santos,&nbsp;Bianca Alencar Cardoso,&nbsp;Thayanne Samille da Silva Santos,&nbsp;Galba Maria de Campos-Takaki,&nbsp;Tatiana Souza Porto,&nbsp;Camila Souza Porto","doi":"10.3390/biotech12010021","DOIUrl":"https://doi.org/10.3390/biotech12010021","url":null,"abstract":"<p><p>β-fructofuranosidases (FFases) are enzymes involved in sucrose hydrolysis and can be used in the production of invert sugar and fructo-oligosaccharides (FOS). This last is an important prebiotic extensively used in the food industry. In the present study, the FFase production by <i>Aspergillus tamarii</i> Kita UCP 1279 was assessed by solid-state fermentation using a mixture of wheat and soy brans as substrate. The FFase presents optimum pH and temperature at 5.0-7.0 and 60 °C, respectively. According to the kinetic/thermodynamic study, the FFase was relatively stable at 50 °C, a temperature frequently used in industrial FOS synthesis, using sucrose as substrate, evidenced by the parameters half-life (115.52 min) and <i>D</i>-value (383.76 min) and confirmed by thermodynamic parameters evaluated. The influence of static magnetic field with a 1450 G magnetic flux density presented a positive impact on FFase kinetic parameters evidenced by an increase of affinity of enzyme by substrate after exposition, observed by a decrease of 149.70 to 81.73 mM on <i>K<sub>m</sub></i>. The results obtained indicate that FFases present suitable characteristics for further use in food industry applications. Moreover, the positive influence of a magnetic field is an indicator for further developments of bioprocesses with the presence of a magnetic field.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10046036/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9202480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development and Evaluation of Chitosan-Based Food Coatings for Exotic Fruit Preservation. 外来水果保鲜用壳聚糖基食品涂料的研制与评价。
BioTech Pub Date : 2023-02-13 DOI: 10.3390/biotech12010020
Juan Camilo Zárate-Moreno, Diana Marcela Escobar-Sierra, Rigoberto Ríos-Estepa
{"title":"Development and Evaluation of Chitosan-Based Food Coatings for Exotic Fruit Preservation.","authors":"Juan Camilo Zárate-Moreno,&nbsp;Diana Marcela Escobar-Sierra,&nbsp;Rigoberto Ríos-Estepa","doi":"10.3390/biotech12010020","DOIUrl":"https://doi.org/10.3390/biotech12010020","url":null,"abstract":"<p><p>Chitosan has gained agro-industrial interest due to its potential applications in food preservation. In this work, chitosan applications for exotic fruit coating, using feijoa as a case of study, were evaluated. For this, we synthetized and characterized chitosan from shrimp shells and tested its performance. Chemical formulations for coating preparation using chitosan were proposed and tested. Mechanical properties, porosity, permeability, and fungal and bactericidal characteristics were used to verify the potential application of the film in the protection of fruits. The results indicated that synthetized chitosan has comparable properties to commercial chitosan (deacetylation degree > 82%), and, for the case of feijoa, the chitosan coating achieved significant reduction of microorganisms and fungal growth (0 UFC/mL for sample 3). Further, membrane permeability allowed oxygen exchange suitable for fruit freshness and natural physiological weight loss, thus delaying oxidative degradation and prolonging shelf-life. Chitosan's characteristic of a permeable film proved to be a promising alternative for the protection and extension of the freshness of post-harvest exotic fruits.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944848/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9327262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Fabrication of a Polycaprolactone/Chitosan Nanofibrous Scaffold Loaded with Nigella sativa Extract for Biomedical Applications. 黑草萃取物负载聚己内酯/壳聚糖纳米纤维支架的制备
BioTech Pub Date : 2023-02-12 DOI: 10.3390/biotech12010019
Qasim Shakir Kahdim, Najmeddine Abdelmoula, Hassan Al-Karagoly, Salim Albukhaty, Jabbar Al-Saaidi
{"title":"Fabrication of a Polycaprolactone/Chitosan Nanofibrous Scaffold Loaded with <i>Nigella sativa</i> Extract for Biomedical Applications.","authors":"Qasim Shakir Kahdim,&nbsp;Najmeddine Abdelmoula,&nbsp;Hassan Al-Karagoly,&nbsp;Salim Albukhaty,&nbsp;Jabbar Al-Saaidi","doi":"10.3390/biotech12010019","DOIUrl":"https://doi.org/10.3390/biotech12010019","url":null,"abstract":"<p><p>In this study, biocompatible electrospun nanofiber scaffolds were produced using poly(-caprolactone (PCL)/chitosan (CS) and <i>Nigella sativa</i> (NS) seed extract, and their potential for biomedical applications was investigated. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), total porosity measurements, and water contact angle measurements were used to evaluate the electrospun nanofibrous mats. Additionally, the antibacterial activities of <i>Escherichia coli</i> and <i>Staphylococcus aureus</i> were investigated, as well as cell cytotoxicity and antioxidant activity, using MTT and DPPH assays, respectively. The obtained PCL/CS/NS nanofiber mat was observed by SEM to have a homogeneous and bead-free morphology, with average diameters of 81.19 ± 4.38 nm. Contact angle measurements showed that the wettability of the electrospun PCL/Cs fiber mats decreased with the incorporation of NS when compared to the PCL/CS nanofiber mats. Efficient antibacterial activity against <i>S. aureus</i> and <i>E. coli</i> was displayed, and an in vitro cytotoxic assay demonstrated that the normal murine fibroblast cell line (L929 cells) remained viable after 24, 48, and 72 h following direct contact with the produced electrospun fiber mats. The results suggest that the PCL/CS/NS hydrophilic structure and the densely interconnected porous design are biocompatible materials, with the potential to treat and prevent microbial wound infections.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944449/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9327260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
In Vitro Anti-HIV-1 Activity of Chitosan Oligomers N-Conjugated with Asparagine and Glutamine. 天冬酰胺和谷氨酰胺偶联壳聚糖低聚物体外抗hiv -1活性研究。
BioTech Pub Date : 2023-02-08 DOI: 10.3390/biotech12010018
Fatih Karadeniz
{"title":"In Vitro Anti-HIV-1 Activity of Chitosan Oligomers <i>N</i>-Conjugated with Asparagine and Glutamine.","authors":"Fatih Karadeniz","doi":"10.3390/biotech12010018","DOIUrl":"https://doi.org/10.3390/biotech12010018","url":null,"abstract":"<p><p>Chitosan oligomers (COS) are polysaccharides obtained by the hydrolyzation of chitosan. They are water-soluble, biodegradable, and have a wide range of beneficial properties for human health. Studies have shown that COS and its derivatives possess antitumor, antibacterial, antifungal, and antiviral activities. The goal of the current study was to investigate the anti-human immunodeficiency virus-1 (HIV-1) potential of amino acid-conjugated COS compared to COS itself. The HIV-1 inhibitory effects of asparagine-conjugated (COS-N) and glutamine-conjugated (COS-Q) COS were evaluated by their ability to protect C8166 CD4+ human T cell lines from HIV-1 infection and infection-mediated death. The results show that the presence of COS-N and COS-Q was able to prevent cells from HIV-1-induced lysis. Additionally, p24 viral protein production was observed to be suppressed in COS conjugate-treated cells compared to COS-treated and untreated groups. However, the protective effect of COS conjugates diminished by delayed treatment indicated an early stage inhibitory effect. COS-N and COS-Q did not show any inhibitory effect on the activities of HIV-1 reverse transcriptase and protease enzyme. The results suggest that COS-N and COS-Q possess an HIV-1 entry inhibition activity compared to COS and further studies to develop different peptide and amino acid conjugates containing N and Q amino acids might yield more effective compounds to battle HIV-1 infection.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9327261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Heterologous Expression of Recombinant Human Cytochrome P450 (CYP) in Escherichia coli: N-Terminal Modification, Expression, Isolation, Purification, and Reconstitution. 重组人细胞色素P450 (CYP)在大肠杆菌中的异源表达:n端修饰、表达、分离、纯化和重组
BioTech Pub Date : 2023-02-07 DOI: 10.3390/biotech12010017
Tao Shang, Chee Mun Fang, Chin Eng Ong, Yan Pan
{"title":"Heterologous Expression of Recombinant Human Cytochrome P450 (CYP) in <i>Escherichia coli</i>: N-Terminal Modification, Expression, Isolation, Purification, and Reconstitution.","authors":"Tao Shang,&nbsp;Chee Mun Fang,&nbsp;Chin Eng Ong,&nbsp;Yan Pan","doi":"10.3390/biotech12010017","DOIUrl":"https://doi.org/10.3390/biotech12010017","url":null,"abstract":"<p><p>Cytochrome P450 (CYP) enzymes play important roles in metabolising endogenous and xenobiotic substances. Characterisations of human CYP proteins have been advanced with the rapid development of molecular technology that allows heterologous expression of human CYPs. Among several hosts, bacteria systems such as <i>Escherichia coli</i> (<i>E. coli</i>) have been widely used thanks to their ease of use, high level of protein yields, and affordable maintenance costs. However, the levels of expression in <i>E. coli</i> reported in the literature sometimes differ significantly. This paper aims to review several contributing factors, including N-terminal modifications, co-expression with a chaperon, selections of vectors and <i>E. coli</i> strains, bacteria culture and protein expression conditions, bacteria membrane preparations, CYP protein solubilizations, CYP protein purifications, and reconstitution of CYP catalytic systems. The common factors that would most likely lead to high expression of CYPs were identified and summarised. Nevertheless, each factor may still require careful evaluation for individual CYP isoforms to achieve a maximal expression level and catalytic activity. Recombinant <i>E. coli</i> systems have been evidenced as a useful tool in obtaining the ideal level of human CYP proteins, which ultimately allows for subsequent characterisations of structures and functions.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944785/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9327266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Separating and Purifying Mycosporine-like Amino Acids from Cyanobacteria for Application in Commercial Sunscreen Formulations. 从蓝藻中分离和纯化类真菌菌素氨基酸用于商业防晒配方。
BioTech Pub Date : 2023-02-03 DOI: 10.3390/biotech12010016
Valeria Candelo, Carole Anne Llewellyn
{"title":"Separating and Purifying Mycosporine-like Amino Acids from Cyanobacteria for Application in Commercial Sunscreen Formulations.","authors":"Valeria Candelo,&nbsp;Carole Anne Llewellyn","doi":"10.3390/biotech12010016","DOIUrl":"https://doi.org/10.3390/biotech12010016","url":null,"abstract":"<p><p>Using algal-derived mycosporine-like amino acids (MAAs) in sunscreen formulations is constrained by low cellular concentrations of MAAs and by the high costs associated with harvesting algal cells and extracting the MAAs. Here, we report an industrial scalable method using a membrane filtration approach to purify and concentrate aqueous extracts of MAAs. The method includes an additional biorefinery step enabling purification of phycocyanin, an established valuable natural product. Cultivated cells of the cyanobacterium <i>Chlorogloeopsis fritschii</i> (PCC 6912) were concentrated and homogenised to produce a feed for sequential processing through three membranes of decreasing pore size to obtain a retentate and permeate for each step. Microfiltration (0.2 µm) was used to remove cell debris. Ultrafiltration (10,000 Da) was used to remove large molecules and recover phycocyanin. Finally, nanofiltration (300-400 Da) was used to remove water and other small molecules. Permeate and retentate were analysed using UV-visible spectrophotometry and HPLC. The initial homogenised feed had a shinorine concentration of 5.6 ± 07 mg L<sup>-1</sup>. The final nanofiltered retentate resulted in a 3.3 times-purified concentrate (shinorine concentration of 18.71 ± 0.29 mg L<sup>-1</sup>). Significant process losses (35%) highlight scope for improvement. Results confirm the potential of membrane filtration to purify and concentrate aqueous solutions of MAAs with simultaneous separation of phycocyanin highlighting a biorefinery approach.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944071/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10765420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Industrial Biotechnology Conservation Processes: Similarities with Natural Long-Term Preservation of Biological Organisms. 工业生物技术保存过程:与生物有机体自然长期保存的相似性。
BioTech Pub Date : 2023-01-31 DOI: 10.3390/biotech12010015
Alexis Laurent, Corinne Scaletta, Philippe Abdel-Sayed, Wassim Raffoul, Nathalie Hirt-Burri, Lee Ann Applegate
{"title":"Industrial Biotechnology Conservation Processes: Similarities with Natural Long-Term Preservation of Biological Organisms.","authors":"Alexis Laurent,&nbsp;Corinne Scaletta,&nbsp;Philippe Abdel-Sayed,&nbsp;Wassim Raffoul,&nbsp;Nathalie Hirt-Burri,&nbsp;Lee Ann Applegate","doi":"10.3390/biotech12010015","DOIUrl":"https://doi.org/10.3390/biotech12010015","url":null,"abstract":"<p><p>Cryopreservation and lyophilization processes are widely used for conservation purposes in the pharmaceutical, biotechnological, and food industries or in medical transplantation. Such processes deal with extremely low temperatures (e.g., -196 °C) and multiple physical states of water, a universal and essential molecule for many biological lifeforms. This study firstly considers the controlled laboratory/industrial artificial conditions used to favor specific water phase transitions during cellular material cryopreservation and lyophilization under the Swiss progenitor cell transplantation program. Both biotechnological tools are successfully used for the long-term storage of biological samples and products, with reversible quasi-arrest of metabolic activities (e.g., cryogenic storage in liquid nitrogen). Secondly, similarities are outlined between such artificial localized environment modifications and some natural ecological niches known to favor metabolic rate modifications (e.g., cryptobiosis) in biological organisms. Specifically, examples of survival to extreme physical parameters by small multi-cellular animals (e.g., tardigrades) are discussed, opening further considerations about the possibility to reversibly slow or temporarily arrest the metabolic activity rates of defined complex organisms in controlled conditions. Key examples of biological organism adaptation capabilities to extreme environmental parameters finally enabled a discussion about the emergence of early primordial biological lifeforms, from natural biotechnology and evolutionary points of view. Overall, the provided examples/similarities confirm the interest in further transposing natural processes and phenomena to controlled laboratory settings with the ultimate goal of gaining better control and modulation capacities over the metabolic activities of complex biological organisms.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944097/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10765421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cell Immortalization: In Vivo Molecular Bases and In Vitro Techniques for Obtention. 细胞永生化:体内分子基础和体外获得技术。
IF 2.7
BioTech Pub Date : 2023-01-28 DOI: 10.3390/biotech12010014
Javier Curi de Bardet, Celeste Ramírez Cardentey, Belkis López González, Deanira Patrone, Idania Lores Mulet, Dario Siniscalco, María de Los Angeles Robinson-Agramonte
{"title":"Cell Immortalization: In Vivo Molecular Bases and In Vitro Techniques for Obtention.","authors":"Javier Curi de Bardet, Celeste Ramírez Cardentey, Belkis López González, Deanira Patrone, Idania Lores Mulet, Dario Siniscalco, María de Los Angeles Robinson-Agramonte","doi":"10.3390/biotech12010014","DOIUrl":"10.3390/biotech12010014","url":null,"abstract":"<p><p>Somatic human cells can divide a finite number of times, a phenomenon known as the Hayflick limit. It is based on the progressive erosion of the telomeric ends each time the cell completes a replicative cycle. Given this problem, researchers need cell lines that do not enter the senescence phase after a certain number of divisions. In this way, more lasting studies can be carried out over time and avoid the tedious work involved in performing cell passes to fresh media. However, some cells have a high replicative potential, such as embryonic stem cells and cancer cells. To accomplish this, these cells express the enzyme telomerase or activate the mechanisms of alternative telomere elongation, which favors the maintenance of the length of their stable telomeres. Researchers have been able to develop cell immortalization technology by studying the cellular and molecular bases of both mechanisms and the genes involved in the control of the cell cycle. Through it, cells with infinite replicative capacity are obtained. To obtain them, viral oncogenes/oncoproteins, myc genes, ectopic expression of telomerase, and the manipulation of genes that regulate the cell cycle, such as p53 and Rb, have been used.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944833/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10765419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Synergistic pH-Responsive Serum Albumin-Based Drug Delivery System Loaded with Doxorubicin and Pentacyclic Triterpene Betulinic Acid for Potential Treatment of NSCLC. 含有多柔比星和五环三萜桦木酸的基于血清白蛋白的协同 pH 响应给药系统,有望用于治疗 NSCLC。
IF 2.7
BioTech Pub Date : 2023-01-26 DOI: 10.3390/biotech12010013
Zally Torres-Martinez, Daraishka Pérez, Grace Torres, Sthephanie Estrada, Clarissa Correa, Natasha Mederos, Kimberly Velazquez, Betzaida Castillo, Kai Griebenow, Yamixa Delgado
{"title":"A Synergistic pH-Responsive Serum Albumin-Based Drug Delivery System Loaded with Doxorubicin and Pentacyclic Triterpene Betulinic Acid for Potential Treatment of NSCLC.","authors":"Zally Torres-Martinez, Daraishka Pérez, Grace Torres, Sthephanie Estrada, Clarissa Correa, Natasha Mederos, Kimberly Velazquez, Betzaida Castillo, Kai Griebenow, Yamixa Delgado","doi":"10.3390/biotech12010013","DOIUrl":"10.3390/biotech12010013","url":null,"abstract":"<p><p>Nanosized drug delivery systems (DDS) have been studied as a novel strategy against cancer due to their potential to simultaneously decrease drug inactivation and systemic toxicity and increase passive and/or active drug accumulation within the tumor(s). Triterpenes are plant-derived compounds with interesting therapeutic properties. Betulinic acid (BeA) is a pentacyclic triterpene that has great cytotoxic activity against different cancer types. Herein, we developed a nanosized protein-based DDS of bovine serum albumin (BSA) as the drug carrier combining two compounds, doxorubicin (Dox) and the triterpene BeA, using an oil-water-like micro-emulsion method. We used spectrophotometric assays to determine protein and drug concentrations in the DDS. The biophysical properties of these DDS were characterized using dynamic light scattering (DLS) and circular dichroism (CD) spectroscopy, confirming nanoparticle (NP) formation and drug loading into the protein structure, respectively. The encapsulation efficiency was 77% for Dox and 18% for BeA. More than 50% of both drugs were released within 24 h at pH 6.8, while less drug was released at pH 7.4 in this period. Co-incubation viability assays of Dox and BeA alone for 24 h demonstrated synergistic cytotoxic activity in the low μM range against non-small-cell lung carcinoma (NSCLC) A549 cells. Viability assays of the BSA-(Dox+BeA) DDS demonstrated a higher synergistic cytotoxic activity than the two drugs with no carrier. Moreover, confocal microscopy analysis confirmed the cellular internalization of the DDS and the accumulation of the Dox in the nucleus. We determined the mechanism of action of the BSA-(Dox+BeA) DDS, confirming S-phase cell cycle arrest, DNA damage, caspase cascade activation, and downregulation of epidermal growth factor receptor (EGFR) expression. This DDS has the potential to synergistically maximize the therapeutic effect of Dox and diminish chemoresistance induced by EGFR expression using a natural triterpene against NSCLC.</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2023-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944877/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10288077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Varietal Differences in Juice, Pomace and Root Biochemical Characteristics of Four Rhubarb (Rheum rhabarbarum L.) Cultivars. 四种大黄(Rheum rhabarbarum L.)汁液、果渣及根生化特性的品种差异品种。
BioTech Pub Date : 2023-01-19 DOI: 10.3390/biotech12010012
Viktor Kharchenko, Nadezhda Golubkina, Alessio Tallarita, Maria Bogachuk, Helene Kekina, Anastasia Moldovan, Vladimir Tereshonok, Marina Antoshkina, Olga Kosheleva, Sergey Nadezhkin, Gianluca Caruso
{"title":"Varietal Differences in Juice, Pomace and Root Biochemical Characteristics of Four Rhubarb (<i>Rheum rhabarbarum</i> L.) Cultivars.","authors":"Viktor Kharchenko,&nbsp;Nadezhda Golubkina,&nbsp;Alessio Tallarita,&nbsp;Maria Bogachuk,&nbsp;Helene Kekina,&nbsp;Anastasia Moldovan,&nbsp;Vladimir Tereshonok,&nbsp;Marina Antoshkina,&nbsp;Olga Kosheleva,&nbsp;Sergey Nadezhkin,&nbsp;Gianluca Caruso","doi":"10.3390/biotech12010012","DOIUrl":"https://doi.org/10.3390/biotech12010012","url":null,"abstract":"<p><p>The complex evaluation of varietal biochemical differences in rhubarb juice, pomace and roots is highly useful to develop an efficient processing technology. Research was carried out to compare four rhubarb cultivars (Malakhit, Krupnochereshkovy, Upryamets and Zaryanka) in terms of the quality and antioxidant parameters of juice, pomace and roots. The laboratory analyses showed a high juice yield (75-82%) with a relatively high content of ascorbic acid (125-164 mg L<sup>-1</sup>) and other organic acids (16-21 g L<sup>-1</sup>). Citric, oxalic and succinic acids accounted for 98% of the total acids amount. The juice of the cultivar Upryamets demonstrated high levels of the natural preservatives sorbic (36.2 mg L<sup>-1</sup>) and benzoic acids (11.7 mg L<sup>-1</sup>), which are highly valuable in juice production. The juice pomace proved to be an excellent source of pectin and dietary fiber, whose concentrations reached 21-24% and 59-64%, respectively. The total antioxidant activity decreased according to the following sequence: root pulp (161-232 mg GAE g<sup>-1</sup> d.w.) > root peel (115-170 mg GAE g<sup>-1</sup> d.w.) > juice pomace (28.3-34.4 mg GAE g<sup>-1</sup> d.w.) > juice (4.4-7.6 mg GAE g<sup>-1</sup> f.w.), suggesting that root pulp is a highly valuable antioxidant source. The results of this research highlight the interesting prospects of the complex rhubarb plant processing for the production of juice, containing a wide spectrum of organic acids and natural stabilizers (sorbic and benzoic acids), dietary fiber and pectin (juice pomace) and natural antioxidants (roots).</p>","PeriodicalId":34490,"journal":{"name":"BioTech","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9944475/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10765418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信