Advance on anti-tumor theranostics and biosafety of bismuth-based nanomedicine / 药学学报

Nanomedicine is one of the most promising fields in biomedicine. Inorganic nanomaterials stand out among many nanomaterials due to their excellent physicochemical properties, stable chemical properties and high biocompatibility. As an inorganic nanomaterial, bismuth-based nanomaterials have the advantages of adjustable band gap, low toxicity, easy functionalization, large X-ray attenuation coefficient, high photothermal conversion efficiency and long cycle half-life, so they have good promising application in cancer diagnosis and treatment. This review summarizes the recent research progress of bismuth-based nanomaterials in tumor diagnosis, treatment and biosafety, which provides a theoretical basis for the design and exploitation of a new generation of bismuth-based nanomedicine systems.

Application and mechanism of nanomedicine and nanomaterials in antibacterial infection therapy / 药学学报

Antibacterial therapy is a global health issue. The antibiotic resistance is becoming an increasingly serious threat, which caused by misuse and overuse of antibacterial agents combined with the emergence of new resistance mechanism. The resulting infection treatment risk and incidence of the spread of disease, severe cases and deaths are increased in different degrees. With the extensive application of biomaterials and nanotechnology to biomedicine, extensive research has been conducted on antibacterial infection. With the specific physicochemical properties like optical, electric and magnetic and high penetration, inorganic nanomaterials can produce natural antibacterial effect. Nanomedicine can be designed to allow controlled drug release and targeting effect, thus demonstrated better antibacterial efficiency. In this review, the mechanism of antibacterial resistance is described, and the antibacterial infection research on inorganic nanomaterials, as well as nano-drug delivery system including liposomes, nanoparticles, dendrimers and biomimetic nanocarriers are summarized. Nanomaterials and nanotechnology offer promising strategies for the development of new agents that can improve efficacy on antibacterial infections and overcome antibiotic resistance potentially.

Research progress on toxic mechanisms of cadmium sulfide nanomaterials / 上海预防医学

Cadmium sulfide nanoparticles are a new type of semiconductor nanomaterials used in many applications. Studies have shown that cadmium sulfide nanoparticles have toxic effects on the reproductive system， liver， and kidney of the body， and the toxicities are affected by various factors. This paper summarized the current research on the toxicity of cadmium sulfide nanoparticles at home and abroad， and reviewed the latest research progress on the mechanisms of its toxic effects and influencing factors.

Application of nanomaterial-based biosensors in airborne pathogen surveillance / 中华微生物学和免疫学杂志

COVID-19 is a novel respiratory infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The continuous emergence of SARS-CoV-2 variants poses a serious threat to the public health. A bedside device with high specificity and sensitivity for real-time and rapid detection is of great value for the prevention and control of COVID-19. Moreover, understanding the transmission behavior of airborne pathogens such as SARS-CoV-2 is also vital for scientific disease prevention. Biosensors are devices that can convert biomolecular reaction signals into detectable physical or chemical signals and have been increasingly used for the detection and analysis of pathogenic microorganisms. Biosensors bases on the conventional detection methods such as colony counting, immunoassays and molecular techniques are often time-consuming, labor-intensive and complicated. Nanomaterial-based biosensors are more portable and can be used for rapid on-site detection. This review summarized the progress in biosensors for pathogen detection and the application of nanomaterial based-biosensors in the surveillance of airborne pathogens.

Research progress in nanomaterials in hemostasis / 药学实践杂志

Nanomaterials, with the advantages of unique microstructure, have been widely used in the fields of material manufacturing, microelectronics and computer technology, medicine and health, environment and energy. Compared with traditional hemostatic materials, nanomaterials can improve the bioavailability and stability of traditional hemostatic drugs to a certain extent, enhance the controlled and targeted release of drugs, which lay a good foundation for the development of new-style modern hemostatic nanomaterials. This paper reviews the advanced design and application progress of various nanomaterials in hemostasis, such as liposomes, nanoparticles, self-assembled nano peptides, nanofibers, etc. Finally, the challenges and prospects of hemostatic nanomaterials are briefly described.

Research Progress on Electrochemical Biosensors for Breast Cancer Detection Based on Nanomaterials / 中国医疗器械杂志

Breast cancer is one of the most serious diseases threatening women's life and health in the world, and the mortality rate is the second in the world. With the progress of nanotechnology and the advantages of nanomaterials in the field of electrochemistry and biosensor, various nanomaterials have been applied in electrochemical biosensors. This makes the electrochemical nano-biosensor in the field of rapid detection of breast cancer has been widely concerned and studied. This paper introduces the important components of electrochemical nano-biosensor for breast cancer detection and the research progress of each component in breast cancer detection, as well as the performance of electrochemical nano biosensor in breast cancer detection and the prospect of its application.

Varying the vegetative and morphological traits of Thymus kotschyanus L. submitted to potassium silicate nanoparticles, superabsorbent hydrogel, effective microorganisms, and animal manure / Variação das características vegetativas e morfológ icas de thymus kotschyanus l. submetida a nanopartículas de silicato de potássio, o hidrogel superabsorvente, os microorgan ismos efetivos e o esterco animal

To study the effects of some new facilitators on the vegetative and morphological traits of Thymus kotschyanus, nine treatments were tested in the experimental rangeland field at the University of Mohaghegh Ardabili, Ardabil, Iran. Treatments included control, potassium silicate nanoparticles (PSN) with two levels of 500 and 1000 mg/lit, superabsorbent hydrogel (SH) with two levels of 10 and 30 g/kg, animal manure (AM) with two levels of 100, 200 g/kg, and effective microorganisms (EM) with two levels of 1 and 2%. Data were subjected to one-way analysis of variance (ANOVA). Results of mean comparisons of treatments for Thymus kotschyanus characteristics showed that the highest amount of studied traits were observed in the treated SH 30 g/kg. These traits include plant height (19.44 cm), basal area (4.66 cm), canopy cover (99.11%), number of secondary branches (9.44) and depth of rooting (16.49 cm), aerial parts volume (26.77 cm3), root volume (17.66 cm3), aerial parts fresh weight (14.40 g), aerial parts dry weight (7.18 g), root fresh weight (3.98 g), and root dry weight (2.07 g). In general, the impact of treatments on Thymus growth traits were ranked as follows: SH 30 g/kg, PSN 1000 mg/lit, AM 200 g/kg, SH 10 g/kg, PSN 500 mg/lit, AM 100 g/kg, EM 2%, and EM 1%. In addition,the lowest plant traits were found in control. Overall, it is recommended extending the cultivation of this native medicinal plant by considering ecological conditions in each region. In addition, to promote the establishment and facilitate the growth of planted species, it is recommended using the facilitators utilized in the present work.

Para estudar os efeitos de alguns novos facilitadores sobre as características vegetativas e morfológicas de Thymus kotschyanus L., nove tratamentos foram testados no campo experimental de pastagens na Universidade de Mohaghegh Ardabili, Ardabil, Irã. Os tratamentos incluíram controle, nanopartículas de silicato de potássio (PSN) com dois níveis de 500 e 1000 mg/L, hidrogel superabsorvente (SH) com dois níveis de 10 e 30 g/kg, esterco animal (AM) com dois níveis de 100 e 200 g/kg e microorganismos efetivos (EM) com dois níveis de 1 e 2%. Os dados foram submetidos a uma análise de variância unidirecional (ANOVA). Os resultados das comparações médias dos tratamentos para as características de Thymus kotschyanus L. mostraram que a maior quantidade das características estudadas foi observada no tratamento com SH 30 g/kg. Essas características incluem altura de plantas (19,44 cm), área basal (4,66 cm), cobertura de dossel (99,11%), número de ramos secundários (9,44) e profundidade de enraizamento (16,49 cm), volume de partes aéreas (26,77 cm3), volume de raiz (17,66 cm3), peso fresco de partes aéreas (14,40 g), peso seco de partes aéreas (7,18 g), peso fresco de raiz (3,98 g) e peso seco de raiz (2,07 g). Em geral, o impacto dos tratamentos nas características de crescimento de Thymus foi classificado da seguinte forma: SH 30 g/kg, PSN 1000 mg/L, AM 200 g/kg, SH 10 g/kg, PSN 500 mg/L, AM 100 g/kg, EM 2% e EM 1%. Além disso, as características mais baixas da planta foram encontradas no controle. Em geral, recomenda-se estender o cultivo desta plantamedicinal nativa considerando as condições ecológicas em cada região. Além disso, para promover o estabelecimento e facilitar o crescimento de espécies plantadas, recomenda-se utilizar os facilitadores utilizados no presente trabalho.

Application of Nanotechnology in Targeting of Cancer Stem Cells: A Review

Cancer is increasingly apparent as a systems-level, network happening. The central tendency of malignant alteration can be described as a two-phase procedure, where an initial increase of network plasticity is followed by reducing plasticity at late stages of tumor improvement. Cancer stem cells (CSCs) are cancer cells that take characteristics associated with normal stem cells. Cancer therapy has been based on the concept that most of the cancer cells have a similar ability to separate metastasise and kill the host. In this review, we addressed the use of nanotechnology in the treatment of cancer stem cells.

Research advances in the detection of miRNA / 药物分析学报

MicroRNAs (miRNAs) are a family of endogenous, small (approximately 22 nucleotides in length), noncoding, functional RNAs. With the development of molecular biology, the research of miRNA bio-logical function has attracted significant interest, as abnormal miRNA expression is identified to contribute to serious human diseases such as cancers. Traditional methods for miRNA detection do not meet current demands. In particular, nanomaterial-based methods, nucleic acid amplification-based methods such as rolling circle amplification (RCA), loop-mediated isothermal amplification (LAMP), strand-displacement amplification (SDA) and some enzyme-free amplifications have been employed widely for the highly sensitive detection of miRNA. MiRNA functional research and clinical diagnostics have been accelerated by these new techniques. Herein, we summarize and discuss the recent progress in the development of miRNA detection methods and new applications. This review will provide guidelines for the development of follow-up miRNA detection methods with high sensitivity and spec-ificity, and applicability to disease diagnosis and therapy.

Research progress of long-wavelength light-triggered photodynamic therapy for malignant tumor treatment / 国际生物医学工程杂志

Malignant tumor is one of the most deadly diseases in the world. Researches focus on finding tumor therapy with better therapeutic efficiency and fewer side effects. Improving the therapeutic effect and reducing the side effects are the two hot topics in the field of malignant tumors treatment. As one of the new methods for non-invasive treatment of malignant tumors, photodynamic therapy (PDT) has the advantage of low cytoxicity and low drug resistance. PDT induces reactive oxygen species (ROS) production by irradiating light to specific sites, causing tumor cell apoptosis and necrosis, and achieving therapeutic purposes. Compared with the traditional PDT, long-wavelength light-triggered photodynamic therapy has deep tissue penetration and less cytoxicity. In this paper, the technical development of the long-wavelength light-triggered PDT was summarized including photosensitizers, two-photon activated PDT and upconversion PDT. The research progress of this therapeutic method in the treatment of malignant tumors was also reviewed.

Preparation and evaluation of fluorescent carbon dots (CDs) and CDs based immunofluorescence probe / 医疗卫生装备

Objective To fabricate an immunofluorescence probe system of carbon dots conjugated antibody based on antigen-antibody reaction principles.Methods A green one-step microwave assisted pyrolysis method was applied to preparing fluorescent carbon dots (CDs) using aminoglucose as carbon source and the obtained CDs were conjugated with antibody via EDC/NHS reactions to build CDs based fluorescent probe.Furthermore,the properties of CDs and CDs based probe system were evaluated by Fourier transform infrared (FTIR) spectra,transmission electron microscopy (TEM),UV-vis absorption and so on.Results The as-prepared CDs showed excellent fluorescence and hydrophilicity and CDs based immunofluorescence probe exhibited the capability of quick detection of E.coli O157:H7.Cinclusion Fluorescent CDs as one new emerging environment-friendly nanomaterial has great potential in biosensors.

Definición de nanomateriales para Colombia / Definition of Nanomateriais for Colombia / Definição de nanomateriais para a Colômbia

Debido a la creciente producción y uso de nanomateriales para actividades de investigación y desarrollo en Colombia, es necesario establecer una definición del término nanomaterial que facilite la toma de decisiones en torno a iniciativas de carácter regulatorio y de normatividad. Se presenta la definición de nanomateriales para Colombia que ha adoptado el Consejo Nacional Asesor de Nanociencia y Nanotecnología adscrito a la Red Colombiana de Nanociencia y Nanotecnología.

Due to the increasing production and use of nanomaterials in research and development activities in Colombia, it is necessary to define the nanomaterial term in order to facilitate decision-making process regarding initiatives with a regulatory or normative character. This article presents the nanomaterials definition that has been adopted by the National Advisory Council for Nanoscience and Nanotechnology, a Colombian Network of Nanoscience and Nanotechnology.

Dada a crescente produção e utilização de nanomateriais para a pesquisa e desenvolvimiento na Colombia, é urgente estabelecer uma definição do termo de nanomaterial para facilitar a tomada de decisão sobre iniciativas na regulamentação e as leis. É apresentada uma definição de nanomateriais para a Colombia que aprovou o Conselho Consultivo Nacional de Nanociência e Nanotecnologia ligado à Rede Colombiana de Nanociência e Nanotecnologia.

Cell death induced by nanomaterials:research progress / 中国药理学与毒理学杂志

With the wide use of nanomaterials in biomedicine,materials,chemicals and other fields,their environmental exposure and cellular toxicity have come to the attention of researchers as a new research area in the field of nanotoxicology and nanomedicine. Researches on the toxic effects of nanomaterials have not only provided of a theoretical basis for safety evaluation of nanomaterials ,but also promoted the have applications of nanotechnology. Numerous studies have revealed cell death is closely associated with the toxicity of nanomaterials. In this paper,we elaborated on the roles of three key cell death modes in nanotoxicity,including autophagy,apoptosis,and necrosis. Furthermore,the pos?sible mechanisms involved in these three modes were explored. All this will provide reference for safety evaluation of nanomaterials.

Results of toxicity for medical nanomaterialsin vitro / Монголын Анагаах Ухаан

BACKGROUND:Nano is a key technology to bring accelerated development in science, economy and business in 21stcentury. Besides lots of advantages contained in nanoproducts, cytotoxic effects on human and environmentmay occur due to their extreme small size and large surface area and it promotes chemical reaction andactivates reactive oxygen species in the cell. In the last few decades, human and environment exposureof nanomaterials have been increasing, but research papers related to nanomaterial toxicity have beenpoor.GOAL: Determination of nanomaterial toxicity in medical applicationMATERIALS AND METHODS:Totally 21 nanomaterials collected in this study including imported nano-medicines, disinfectantspray, cleaning solution and experimental nanomaterial produced in Mongolia. The particle sizesof nanomaterialswere determined by Cross correlation analysis and X-Ray diffraction analysis, andmutagenicity was determined by Ames test.RESULTS:The particle sizes of nanomaterials in 5 of 21 were measured at the range of 1 – 100nm and 5 of 21nanomaterials were determined as mutagenic by Ames test.CONCLUSION:Ingredients and production methods can be one of causes of nanomaterial toxicity. Therefore, morespecific methods are needed to reveal cytotoxicity of nanomaterials in the future.

The Application and evaluation of Nano-dispersion systems of nanomaterials in medical devices / 中国医学装备

Objective:To evaluate the methods of nano-dispersion systems and the stability of samples in medical devices.Methods: By analyzing the cause of agglomeration and comparing kinds of methods to orient the elements of nano-dispersion Systems and the evaluation means. Results: To obtain the repetitive results, the foundation methods of nano-dispersion systems should be recorded in detail and all the following tests should be based on it.Conclusion: The constitution and evaluation of a dispersion system in obtaining representative and reproducible results in biological evaluation is very important and should be studied case by case.

The new generation drug- eluting stents and their effects of anti- thrombosis / 介入放射学杂志

This paper aims to make a comprehensive review about the new generation drug-eluting stents and their effects of anti-thrombosis to decrease stent thrombosis (ST), which are very helpful for interventional radiologists, especially for cardiologists who are engaged in percutaneous coronary interventional therapy. Based on the review of recently published academic papers and the investigation of the manufacturers and market of stent, the main factors related to ST complication which is associated with new generation drug-eluting stents are retrospectively and briefly analyzed. Besides, a variety of new generation drug-eluting stents with anti-thrombosis effect that are being successfully developed recently with new technology and new materials, including the renewal or improvement of the stent platform, loaded drug, carrier and its loading technology, etc. are comprehensively described in this paper in a combination way of vivid pictures with corresponding essay. In addition, the development and the prospect in clinical application of biodegradable drug-eluting stents are also briefly discussed in this paper.

Physical damage -the origin of nanotoxicity / 中国药理学与毒理学杂志

Despite tre mendous research efforts have been devoted to the analysis of nanoparticles (NPs)biohazard,the potential mechanism for nanotoxicity has not yet been syste mati-cal y elucidated.This review intends to point out the confusions about nanotoxicity in the field and tries to look into the mecha-nism from a new perspective.Currently,there are three puzzles:① no relationship between dose and toxicity could be observed in nanotoxicity;②there is a theory for the″size effects″,however, it cannot explain some cases contrary to the doctrine;③ NPs made of different materials with various sizes could have the same toxic effects through sti mulating oxidative stress.In fact, human body is co mposed of various biological molecules,and the biological function of a living syste m is reflected by the inter-actions and conversions of those molecules.NPs,on the other hand,are the invader of human body which has no ability to transport or convert or digest the foreigner.Thus,NPs could cause celldamage due to the physical blockage of micro-circula-tion,celldestruction due to membrane rando m insertion,and celldysfunction due to physical contacting with big biological mole-cules.The physical damages caused by various NPs could be divided into three categories:adhesion lesion,card inlay and puncture.Above al ,by analyzing wide spectrum of NPs varying in co mposition,shape and size,the author draws a conclusion that physical damage is the origin of nanotoxicity.

Applications of upconversion nanoparticles for cancer photodynamic therapy / 中国肿瘤临床

The advent of nanoscience and nanotechnology offers unprecedented opportunities in nanomedicine, such as increas-ing therapeutic efficiency and decreasing undesired side effects in cancer treatment. Photodynamic therapy (PDT) is a non-invasive pho-totherapy-based method that is applied in the treatment of cancer and other diseases and has important clinical value. PDT can be com-bined with other therapies to realize the synergistic treatment. The emergence of up-conversion nanomaterials provides a fundamental method to solve the problem of photodynamic therapy of deep tumors. Moreover, the versatile preparation and surface modification methods facilitate the fine-tuning of the emission spectrum of up-conversion nanomaterials and the improvement of the photosensitiz-er's loading capacity. This study reviews the development in design and application of up-conversion nanomaterials for PDT of cancer.

Modern cells methods of the toxicity for nano medical products / Монголын Анагаах Ухаан

With the development of nanotechnology, nanomaterials are being widely used in manyindustries aswell as in medicine and pharmacology. Despite the many proposed advantages of nanomaterials,increasing concerns have been expressed on their potential adverse human health effects. In recentyears, application of nanotechnology in medicine has been defined as nanomedicine. Techniquesin nanomedicine make it possible to deliver therapeutic agents into targeted specific cells, cellularcompartments, tissues, and organs by using nanoparticulate carriers. Because nanoparticlespossess different physicochemical properties than their fine-sized analogues due to their extremelysmall size and large surface area, they need to be evaluated separately for toxicity and adversehealth effects. In addition, in the field of nanomedicine, intravenous and subcutaneous injectionsof nanoparticulate carriers deliver exogenous nanoparticles directly into the human body withoutpassing through thenormal absorption process. These nanoparticulate carriers themselves maybe responsible for toxicity and interaction with biological macromolecules within the human body.Second, insoluble nanoparticulate carriers may accumulate in human tissues or organs. Therefore,it is necessary to address the potential health and safety implications of nanomaterials used innanomedicine. Toxicological studies for biosafety evaluation of these nanomaterials will be importantfor the continuous development of nanomedical science. This review summarizes the currentknowledge on toxicology of nanomaterials, particularly on those used in nanomedicine.

Application of novel nanoparticles carriers in drug or gene delivery / 中国药学杂志

OBJECTIVE: To summary the application of new types of nanoparticles carriers emerged in recent years in drug or gene delivery. METHODS: By sorting, analyzing and summarizing domestic and foreign literatures, the characteristics, in vivo and in vitro properties and the applications in pharmacy of novel nanoparticles carriers such as nano cochleates, virus-like particles, hydrogel nanoparticles, gold nanoshells, carbon nanomaterials, quantum dots and dendrimers were reviewed and elaborated. RESULTS AND CONCLUSION: Nanoparticles possess special physical and chemical properties which could improve the stability and bioavailability of drugs and have a targeting and sustained release effect.