Delivery of b-galactosidase gene in vivo with amphyphylic and combined liposomes

Author(s):  
Е.В. Богданенко ◽  
Р.И. Жданов

Цель исследования. Получение безопасного и эффективного вектора в целях генной терапии остается актуальной и нерешенной задачей, несмотря на усилия многих лабораторий в мире. Синтез веществ, имеющих сродство к ДНК и стабилизирующих ее спираль, а также обладающих группировками, опознаваемыми клетками нужных органов, является одним из перспективных направлений в таких исследованиях. Целью данной работы было изучение эффективности переноса в различные органы мышей репортерного гена бактериальной b-галактозидазы липосомами, содержащими синтетические холестериновые производные олигоэтиленпропиленимина (дихоленим и трихоленим), а также лактозилированный диглицерид (лактозолипид, LacS). Методика. Предварительно электронномикроскопически была подтверждена способность холенимов образовывать комплексы с ДНК оптимальных для трансфекции размеров (100-200 нм). Проверка холенимов на токсичность in vivo и введение липосом (фосфатидилхолин (ФХ)/дихоленим, ФХ/трихоленим и ФХ/лактозолипид/дихоленим в комплексе с плазмидой pCMV-SPORT-b-gal) в воротную вену печени проводились на самцах мышей линии ICR массой 30-40 г. Контролем служили интактные животные. Результаты. Cпособность холенимов образовывать комплексы с ДНК была подтверждена электронными микрофотографиями. Размеры комплексов (100-200 нм) оказались оптимальными для трансфекции in vivo , а холенимы - нетоксичными. Через 2 сут. после введения комплексов гистохимически на криосрезах внутренних органов животных с Х-Gal (субстрат) обнаружена отчетливо выраженная трансфекция органов, в том числе печени - главного объекта генной терапии. Заключение. Лактозилированный липид LacS и производные олигоэтиленпропиленимина холенимы являются безопасными, не менее и эффективными для достижения экспрессии функционального гена in vivo , чем коммерческие препараты, и перспективными для эффективной адресной доставки генов. The purpose of the work. Receipt of safe and effective vector for the purpose of genetic therapy remains the topical and unsolved problem inspite of many laboratories efforts in the world. Synthesis of substances which have affinity to DNA and stabilize its helix and also have the moieties recognized with the cells of the desired organs is one of the perspective ways in these investigations. Study of the effectivity of b-galactosidase bacterial reporter gene transfer with liposomes containing synthetic cholesteroyl derivatives of the oligoethylen/propylen/imine dicholenim and tricholenim and also lactosylated diglycerid (lactosolipid, LacS) to mouse organs was the purpose of this work. Methods. Previously ability of cholenims to form complexes with DNA of the optimal for transfection size (100-200 nm) was confirmed by electron microscopy technique. Testing the non-toxicity of cholenims in vivo and injections of phosphatidylcholine(Ph)/dicholenim, Ph/tricholenim and Ph/lactosolipid/dicholenim liposomes complexed with the pCMV-SPORT-b-gal plasmid to the liver portal vein were carried out on the mouse males of the ICR strain of 30-40 g of weight. The intact animals were as a control. Results. The ability of cholenims to form complexes with DNA was confirmed with electron micrographs. Complex sizes (100-200 nm) were optimal for in vivo transfection, and holenims were found non-toxic ones. The well-marked transfection of the animal’s inner organs including liver which is the main target of the genetic therapy was detected in two days after injection of the complexes by histochemical reaction of the cryosections with Х-Gal and the consequent light microscopy of the sections. Conclusion. It is concluded that the lactosylated lipid LacS and the oligoethylen/propylen/imine derivatives cholenims are not less safe and effective for achieving expression of the functional gene in vivo than the commercial ones and are promising for the effective targeted gene delivery.

1984 ◽  
Vol 51 (02) ◽  
pp. 248-253 ◽  
Author(s):  
R J Dupe ◽  
P D English ◽  
R A G Smith ◽  
J Green

SummaryA quantitative model of venous thrombosis in the beagle dog is described. The model was adapted to permit ageing of isolated experimental clots in vivo. A model of acute pulmonary embolism in this species is also described. In the venous thrombosis model, infusion of streptokinase (SK) or SK-activated human plasmin gave significant lysis but bolus doses of SK. plasmin complex were ineffective. Active site anisoylated derivatives of SK. plasminogen complex, SK-activated plasmin and activator-free plasmin were all active when given as bolus doses in both models. At lytic doses, the acyl-enzymes caused fewer side-effects attributable to plasminaemia than the corresponding unmodified enzymes.


2020 ◽  
Vol 26 ◽  
Author(s):  
Sridevi Vaadala ◽  
Naveen Ponneri ◽  
Venkat Shashank Karnam ◽  
Ramachandra Reddy Pamuru ◽  
Mohammed Arifullah

Background: Phytoestrogens are non-endocrine, non-steroidal secondary derivatives of plants and consumed through plant-based diet also named as “dietary estrogens”. The major sources of phytoestrogens are soy and soy-based foods, flax seed, chickpeas, green beans, dairy products, etc. The dietary inclusion of phytoestrogen based foods play a crucial role in the maintenance of metabolic syndrome cluster including obesity, diabetes, blood pressure, cancer, inflammation, cardiovascular diseases, postmenopausal ailments and their complications. In recent days, phytoestrogens are the preferred molecules for hormone replacement therapy. On the other hand, they act as endocrine disruptors via estrogen receptor mediated pathways. These effects are not restricted to adult males or females and identified even in development. Objective: Since phytoestrogenic occurrence is high at daily meal for most people from all over the world, they focused to study for its beneficiary effects towards developing pharmaceutical drugs for treating various metabolic disorders by keeping an eye on endocrine disruption. Conclusion: The present review emphasizes the pros and cons of phytoestrogens on human health, which may help to direct the pharmaceutical industry to produce various phytoestrongen based drugs against various metabolic disorders.


2013 ◽  
Vol 10 (8) ◽  
pp. 741-747 ◽  
Author(s):  
Roberta Soares ◽  
Roberta Corrales ◽  
Fernanda Lopes ◽  
Marcio Alves ◽  
Adilson Silva ◽  
...  

2020 ◽  
Vol 16 ◽  
Author(s):  
Lucas da Silva Santos ◽  
Matheus Fillipe Langanke de Carvalho ◽  
Ana Claudia de Souza Pinto ◽  
Amanda Luisa da Fonseca ◽  
Julio César Dias Lopes ◽  
...  

Background: Malaria greatly affects the world health, having caused more than 228 million cases only in 2018. The emergence of drug resistance is one of the main problems in its treatment, demonstrating the urge for the development of new antimalarial drugs. Objective: Synthesis and in vitro antiplasmodial evaluation of triazole compounds derived from isocoumarins and a 3,4- dihydroisocoumarin. Method: The compounds were synthesized in 4 to 6-step reactions with the formation of the triazole ring via the Copper(I)-catalyzed 1,3-dipolar cycloaddition between isocoumarin or 3,4-dihydroisocoumarin azides and terminal alkynes. This key reaction provided compounds with an unprecedented connection of isocoumarin or 3,4-dihydroisocoumarin and the 1,2,3-triazole ring. The products were tested for their antiplasmodial activity against a Plasmodium falciparum chloroquine resistant and sensitive strains (W2 and 3D7, respectively). Results: Thirty-one substances were efficiently obtained by the proposed routes with an overall yield of 25-53%. The active substances in the antiplasmodial test displayed IC50 values ranging from 0.68-2.89 μM and 0.85-2.07 μM against W2 and 3D7 strains, respectively.


Author(s):  
Ya-Nan Li ◽  
Ni Ning ◽  
Lei Song ◽  
Yun Geng ◽  
Jun-Ting Fan ◽  
...  

Background: Deoxypodophyllotoxin, isolated from theTraditional Chinese Medicine Anthriscus sylvestris, is well-known because of its significant antitumor activity with strong toxicity in vitro and in vivo. Objective: In this article, we synthesized a series of deoxypodophyllotoxin derivatives, and evaluated their antitumor effectiveness.Methods:The anti tumor activity of deoxypodophyllotoxin derivatives was investigated by the MTT method. Apoptosis percentage was measured by flow cytometer analysis using Annexin-V-FITC. Results: The derivatives revealed obvious cytotoxicity in the MTT assay by decreasing the number of late cancer cells. The decrease of Bcl-2/Bax could be observed in MCF-7, HepG2, HT-29 andMG-63 using Annexin V-FITC. The ratio of Bcl-2/Bax in the administration group was decreased, which was determined by the ELISA kit. Conclusion: The derivatives of deoxypodophyllotoxin could induce apoptosis in tumor cell lines by influencing Bcl-2/Bax.


1984 ◽  
Vol 49 (1) ◽  
pp. 110-121 ◽  
Author(s):  
Jiří Křepelka ◽  
Drahuše Vlčková ◽  
Milan Mělka

Alkylation of derivatives of 4-aryl-1-naphthols (I-V) by 2,3-epoxypropyl chloride in methanolic sodium hydroxide gave epoxy derivatives VI, VIII, IX, XI and XII, apart from products of cleavage of the oxirane ring, VII and X. Analogous alkylation of compounds I, IV and V by 2-(N,N-diethylamino)ethyl chloride hydrochloride in a two-phase medium afforded basic ethers XIII to XV. The cleavage of the oxirane ring in compound VI by the action of primary and secondary amines, piperidine and substituted piperazines led to compounds XVI-XXIV. Reaction of thionyl chloride with compounds XXI, XXII and XXIV gave chloro derivatives XXV-XXVII.Exposure of compound XXII to 4-methylbenzenesulfonyl chloride produced compound XXVIII, retaining the secondary alcoholic group. In an antineoplastic screening in vivo none of the compounds prepared had an appreciable activity. Compound XVII, being an analogue of propranolol, was used in the test of isoproterenolic tachycardia, and showed a beta-lytic effect comparable with that of propranol.


2014 ◽  
Vol 74 ◽  
pp. 742-750 ◽  
Author(s):  
Chengyuan Liang ◽  
Juan Xia ◽  
Dong Lei ◽  
Xiang Li ◽  
Qizheng Yao ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document