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SILVER NANOPARTICLES AND NEGLECTED DISEASES

SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

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Page 1: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

SILVER NANOPARTICLES

AND NEGLECTED DISEASES

Page 2: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Goal

Cutaneous leihmaniasis

Page 3: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Ulcera Buruli is a skin diseases and of soft tissues with the possibility of physical incapacity. It is produced byan environmental pathogens,Mycobacterium ulcerans, that producea destructive toxin. Mainly attack children at the Sub-Sahara in Africaregion.

N. Durán, 2º Reunião Ciência Tecnologia Sociedade Buenos Aires-Argentina, 5-8 de Junho, 2006.

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Traditionally, the pharmaceutical therapy has been considered inefficient, but recent results suggest a combination of antibiotics that include Rifampicin and Streptomycin or amikacine are adequate to kill M. ulcerans in human lesions [WHO, Wkly Epidemiol. Rec. 78, 163-168 (2003).

N. Durán, 2º Reunião Ciência Tecnologia Sociedade Buenos Aires-Argentina, 5-8 de Junho, 2006.

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PREPARAÇÃO

Sintese química de nanoparticulas de prata

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PREPARAÇÃO

Biosynthesis of silver nanoparticles

Fusarium oxysporum was grown by 7 days

Absorptions were measured in UV-Vis

The biomass was filtrated and AgNO3 (10 mM) was added in the fungal liquid

The biomass was filtrated and resuspended in sterile water

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Silver nanoparticlesSize: 1,6 nm (biosynthesis)

Durá et al. J. Nanobiotechnol. 2005

Silver nanoparticlesSize: 175 nm

(Chemical synthesis)

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CLIN

CLIN

CLIN

CLINCLIN

CLIN

CLIN

CLIN

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Sitio de ação de antibioticos

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Antibacteria Assay

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O QUE FAZEM AS NANOPARTICULAS DE PRATA?

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SKIN PERMEATION IN VITRO

Human abdominal skin

The nanoparticles did not reach the receptor compartment

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DOENÇAS DE PELE

ACNE

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Propiobacterium acnes bacteria

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Contra a bacteria Propiobacterium acnesassociada em parte com a inflamação doacne

Clindamycin Emulsão topica 1% ou gel

Liga-se as subunidades ribossomais 50S e Inibe a síntese de proteínas

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CLIN

CLIN

CLIN

CLINCLIN

CLIN

CLIN

CLIN

CLIN

CLIN

CLIN

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ACNE

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PAPEL DE NANOPARTICULAS

DE PRATA EM QUEIMADURAS

Page 21: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Silver nanoparticles formulation from Agharkar Research Institute, Pune-IndiaA) Treatment with Ag-formulation showed 90% healing after 4 weeks. B) Treated with conventional medicine healed only 60%. C) After 4 months part treated with Ag-form. showed healing with normal skin textureD) treatment with conventional medicine showed healing with some scars.

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Jun Tian, Kenneth K. Y. Wong, Chi-Ming Ho, Chun-Nam Lok,Wing-Yiu Yu,] Chi-Ming Che, Jen-Fu Chiu, and Paul K. H. Tam. Topical delivery of silver nanoparticles promotes wound healing.ChemMedChem.(2007)2,129-136.

• Preparation of the dressings:• Nanosilver-coated dressing: Initial experiments were carried

out by using silver nanoparticle grafted dressing (silver content: 2.75 mgg1, Anson Nanotechnology Group Co., Ltd. Hong Kong). A piece of silver nanoparticle-coated dressing (4H3 cm2) weighed 0.1737 g. This corresponds to 0.4777 mg of silver nanoparticles on each piece. Transmission electron microscopy revealed that silver nanoparticles were spherical, with diameters of 149.8 nm based on 750 particle measurements on five sites of interest. Subsequently experiments were performed with silver nanoparticles (1 mm) synthesized by borohydride reduction of AgNO3 in the presence of citrate as a stabilizing agent, as previously described.[45] Similar efficacy with silver nanoparticle dressing was confirmed (data not shown).

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SSDNTND

Silver Nano Silver sulfadiazine

E:epidermidHF: hair follicles

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CULTURA DE MICRORGANISMOS NO PANO DA FERIDA NOS DIAS 1, 3, 5, 7 E 10 NOS ANIMAIS TRATADOS COM ND (GRIS), SSD (BRANCO E NÃO TRATADO (GRIS ESCURO)

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silver nanoparticles can modulate local and systemic inflammatory response following burn injury by cytokine modulation.

ND▄ No treatment▲ SSD

IL-6 TGF-beta IL-10

VGEF IFN-gama

IL-6 aumenta inflamaçãoTGF-beta auenta inflamaçãoIl-10regula citokinasVGEF (vascular endotelial growth factor) promove cicatrizaçãoIFN-gama aumenta colageno

Page 26: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

NANOPARTICULAS DE OURO APLICADAS COMO

CARREGADORES DE ANTICANCER

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Page 28: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Alves et al. Patente Braz. PIBr 0502657-1 (2005).

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NANOPARTICULAS DE OXIDO DE FERRO

COMO CARREGADORES DE

FÁRMACOS

Page 32: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Lewin et al. Nat. Biotechnol. 18, 410 (2000)

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NANOPARTICULAS DE PRATA DE SINTESE FUNFICA E SUA

APLICAÇÃO EM FIBRAS TEXTEIS

Page 36: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Staphylococcus aureus Klebisiela pneumoniae

Algodão 100%

Nanoparticulas

Impregnação em

tecido têxtil para

atividade biocida

Teste oligodinamico

Durán et al. Patente Braz. PIBr 0605681-4 (2006)

Page 37: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

1) Algodão 100% e 2) poliester 100% 3) Cultura de Staphylococus

aureus e 4) Teste com tecido algodão impregnado com

nanopartículas de prata frente à cultura bacteriana e 5) teste do

tecido poliester impregnado com nanopartículas de prata frente à

cultura bacteriana 1

3

4

2

Page 38: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

ATIVIDADE BIOCIDA DO TECIDO IMPREGNADO (ALGODÃO) COM NANOPARTÍCULAS DE PRATA

frente a bactéria S. aureus

Page 39: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

MICROSCOPIA ELETRÔNICA DE VARREDURA DO TRATAMENTO DE ALGODÃO COM NANOPARTICULAS DE PRATA

Durán et al. J. Biomed. Nanotechnol. 3, 203-208 (2007).

Tecido Controle (sem nanopartículas de prata)

Tecido com nanopartículas de

prata

Page 40: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

ATIVIDADE BIOCIDA DO TECIDO IMPREGNADO

(POLIÉSTER) COM NANOPARTÍCULAS DE PRATA frente a

bactéria S. aureus

M.O do Poliéster

impregnado com

nps.

M.O das amostras não impregnadas

Page 41: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

MATERIAS PARA FERIMENTOS

Área superficial grande de partículas de prata tamanho nano melhora a

efetividade antibacteriana

-melhora os tempos de recuperação-mata bactéria mais rápido com nanoparticulas que outras formas de prata

Page 42: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

NANOPARTICULAS METALICAS

NO MEIOAMBIENTE

Page 43: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Zhang, J. NANOPART. RES. 5, 323-332 (2003)    

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99% de tetracloroeteno foi removido em poucos dias com a

adição de nanopartículas de Fe/Pd

10-100 nm

Nano (50 nm) foram 25x mais eficientes que micro de 10 m

Page 45: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis
Page 46: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

As partículas podem permear ate 20 m de distância pelo solo

e permanecem reativas por 4-8 semanas

Page 47: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

CHLORPYRIFOS MALATHION

ENDOSULFAN

ELIMINAÇÃO DE PESTICIDAS POR ADSORÇÃO EM NANOPARTÍCULAS

METÁLICAS

Nair et al. Pramana J. Phys. (India) 65, 631-640 (2005) (www.iitm.ac.in)

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Au@citrate nanoparticles

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Gestão e eliminação de contaminação

Tratamento e Remediação

Tratamento com ferro…

Usado para tratamento por muitos anos de aqüíferos. O ferro reduz quimicamente o material orgânico e contaminantes ambientais inorgânicos. Comumente envolve ferro granulado ou “microescala” ( 50 m ou 50,000 nm).

e Nanotecnologia

Ferro de tamanho nano aumenta a reação. Aumenta mais ainda por acoplamento com outros metais (Fe/Pd)* em nanoescala. Nano Fe0 é mais reativo e efetivo que em microescala. Tamanhos menores o fazem mais flexível-penetra a áreas difícil aceso.

* Elliot and Zhang ES&T 2001, 35, 4922-4926

Page 50: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Kamat, P.V, et al. J.Phys.Chem. B 2002, 106,788-794.

Oxido de Zinco (ZnO) de tamanho nano “sente” poluentes orgânicos indicado pela mudança do sinal de emissão na região do visível.

A capacidade de sensor significa que a fase energética da oxidação somente ocorre quando o poluente está presente.

“Sentir e Eliminar” Uma estratégia para

tratamento de poluentes

“Sentir e Eliminar” Uma estratégia para

tratamento de poluentes

O ZnO “elimina” os poluentes via oxidação fotocatalítica para formar compostos mais benignos para o ambiente

Multifuncionalidade e “esperteza” é altamente desejável para aplicações ambientais.

Papel duplo do filme de semicondutor ZnO como um

sensor e fotocatalisador

>300 nm

UV

Page 51: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

NANOPARTICULAS METALICAS EM

BIOTECNOLOGIA

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Diminuição da afinidade

pelo substrato (baixa flexibilidade)

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Kim et al. J. Mol.Catal. B. Enzyme 39, 62 (2006)

IMOBILIZAÇÃO DE LIPASE EM NANOPARTICULAS DE SILICA MODIFICADA

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Page 56: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

Aminopropiltrietoxisilano

Glutaraldeido

Fe3O4)}}}---(O)3 -Si-( CH2)3NH=CH-CH2-CH2-CH2-CO-H

H2N- {Enzyme}

Fe3O4)}}}---(O)3 -Si-( CH2)3NH=CH-CH2-CH2-CH2-CH=N-{Enzyme}

NOTA: MAIOR A CADEIA MAYOR ATIVIDADE

Fe3O4

Fe3O4

Celulase

Celulase

CELLULASE IMMOBILIZATION ON Fe3O4 AND CHARACTERIZATION, Garcia et al.Biotechnol. Bioeng. 33, 321-326 (1989).

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CARACTERISTICAS

Efeito do pH e de temperatura na atividade dacelulase imobilizada e na livre

Imobilizada: pH 5.5 temp. otima: 50oC t1/2 272 h

livre: pH 4.0 temp. otima: 45oC t1/2 0.77 h

Estabilidade termica da imobilizada a 40oC, pH 4.5 e agitação 120 oscilações/min30 horas perde 40% da atividade.100 horas perde 50% da atividade

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IMOBILIZAÇÃO DA CELULASE

Razão peso cel.--------------------- Prot. adic. Prot agua Prot. lig. Ativ.espe. Peso suporte (mg) (unis/g supor)----------------------------------------------------------------------------------0.03 7.3 6.65 0.65 2.66 ----------------------------------------------------------------------------------

Ativ. Especif. livre Ativ. Especif.Imob. Eficie(umol gluc/g prot./h) (umol gluc./g prot. lig/h) reten

enz (%)-------------------------------------------------------------------------

0.03 4219,7 5410.3 128.2

Page 59: SILVER NANOPARTICLES AND NEGLECTED DISEASES. Goal Cutaneous leihmaniasis

ALGUNS DOS PRODUTOS COM

NANOPARTICULAS METALICAS

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Zaine: Muito provavelmente pode ocorrer absorção sistêmica ou mesmo geração de radicais livres e danos ao DNA em camadas mais profundas da pele devido a reações fotocatalíticas ocasionadas por dioxido de titanio e de zinco

Zaine: Muito provavelmente pode ocorrer absorção sistêmica ou mesmo geração de radicais livres e danos ao DNA em camadas mais profundas da pele devido a reações fotocatalíticas ocasionadas por dioxido de titanio e de zinco

Aplicações

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Zaine:Zaine: Aplicações

COSMÉTICOS

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REDE NANOTUB0SDE CARBONOCNPq/MCT

ACKNOWLEDGEMENTS

CNPq/MCT