BRPI1006850B1 - Processo para determinar a susceptibilidade para contrair infecção nosocomial - Google Patents
Processo para determinar a susceptibilidade para contrair infecção nosocomial Download PDFInfo
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- BRPI1006850B1 BRPI1006850B1 BRPI1006850-3A BRPI1006850A BRPI1006850B1 BR PI1006850 B1 BRPI1006850 B1 BR PI1006850B1 BR PI1006850 A BRPI1006850 A BR PI1006850A BR PI1006850 B1 BRPI1006850 B1 BR PI1006850B1
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Abstract
Description
- • a SIRS é uma resposta sistêmica inflamatória desencadeada por uma variedade de causas infecciosas ou não.
- • a sepse é uma síndrome de resposta sistêmica inflamatória em relação com uma infecção,
- • uma sepse severa é uma sepse associada a uma hipotensão arterial e/ou hipoperfusão e/ou disfuncionamento de pelo menos um órgão,
- • o choque séptico é uma sepse severa associada a uma hipotensão persistente e pode ser qualificado:
- • pela presença de um local infeccioso identificado,
- • por uma hipotensão persistente apesar dos enchimentos adequados e dos tratamentos vasopressores.
• uma etapa de lise das células presentes na amostra biológica, a fim de liberar os ácidos nucleicos contidos nos envoltórios proteicos e/ou lipídicos dos micro-organismos (como restos celulares que perturbam as reações posteriores). A título de exemplo, podem-se aplicar os métodos de lise, tais como descrito nos pedidos de patente:
- ○ WO-A-00/05338 sobre a lise mista magnética e mecânica,
- ○ WO-A-99/5304 sobre a lise elétrica, e
- ○ WO-A-99/15321 sobre a lise mecânica.
- • uma etapa de purificação, permitindo a separação entre os ácidos nucleicos e os outros constituintes celulares ampliados na etapa de lise. Essa etapa permite geralmente concentrar os ácidos nucleicos. A título de exemplo, podem-se utilizar partículas magnéticas eventualmente revestidas de oligonucleotídeos, por adsorção ou cova-lência (vide, a esse respeito, Patentes US-A-4,672,040 e US-A-5,750,338), e assim purificar os ácidos nucleicos que se fixaram sobre essas partículas magnéticas, por uma etapa de lavagem. Essa etapa de purificação dos ácidos nucleicos é particularmente interessante, caso se deseje amplificar posteriormente esses ácidos nucleicos. Um modo de realização particularmente interessante dessas partículas magnéticas é descrito nos pedidos de patentes: WO-A-97/45202 e WO-A-99/35500. Um outro exemplo interessante de método de purificação dos ácidos nucleicos é a utilização de sílica, seja sob a forma de coluna, seja sob a forma de partículas inertes (2) ou magnéticas (Merck: MagPrep□ Sílica, Promega: MagneSil® Paramagnetic particles). Outros métodos muito difundidos se baseiam sobre resinas trocadoras de íons em coluna ou em formato particular para magnético (Whatman: DEAE-Magarose) (Levison PR et al., J. Chromatography, 1998, p. 337-344). Um outro método muito pertinente, mas não exclusivo para a invenção é aquele da adsorção sobre um suporte de óxido metálico (Société Xtrana: matrice Xtra-Bind®). Essa etapa de extração pode ser feita em autômatos. O autômato easyMAG® é particularmente adaptado.
- 1) após terem sido extraídos os ARN totais de uma amostra biológica, realiza-se uma etapa de transcrição inversa, tal como descrita anteriormente, a fim de obter os diferentes ADN complementares dos diferentes mensageiros de ARN inicialmente presentes na amostra biológica (ou ADNc);
- 2) amplificam-se especificamente os ADNc. Nesse caso, o reagente específico utilizado compreende pelo menos um iniciador de amplificação específico do gene-alvo, tal como definido anteriormente. Essa etapa pode ser realizada notadamente por uma reação de amplificação de tipo PCR ou por qualquer outra técnica de amplificação apropriada; e
- 3) determina-se a expressão do gene-alvo, quantificando os ADNc. Os ADNc podem ser quantificados notadamente pela utilização de uma faixa de quantificação obtida por uma reação de amplificação conduzida até à saturação. A fim de considerar a variabilidade de eficácia enzimática que pode ser observada, quando das diferentes etapas (transcrição inversa,.PCR...), pode-se normalizar a expressão do gene-alvo dos diferentes grupos de pacientes, pela determinação simultânea da expressão de um gene dito de família, cuja expressão é similar nos diferentes grupos de pacientes. Realizando-se uma relação entre a expressão do gene-alvo e a expressão do gene de família, corrige-se assim qualquer variabilidade entre as diferentes experiências. O técnico poderá se referir notadamente às seguintes publicações [6,7].
- 1) após ter extraído os ARN totais de uma amostra biológica, realiza-se uma etapa de transcrição inversa, tal como descrita anteriormente, a fim de obter as diferentes ADN complementares dos diferentes mensageiros de ARN inicialmente presentes na amostra biológica (ou ADNc);
- 2) imobiliza-se os ADNc sobre uma membrana;
- 3) determina-se a expressão do gene-alvo, hibridizando-se os ADNc com sondas de hibridização específicas do gene-alvo previamente marcadas. Essas técnicas de hibridização são bem conhecidas do técnico, e pode-se citar notadamente a técnica de Northern blot. Essa reação de hibridização pode ser realizada após uma etapa de amplificação específica dos ADN complementares dos mensageiros de ARN de um gene-alvo, quando notadamente o gene é ligeiramente expresso.
- a) se dispõe de uma amostra biológica de um paciente e se extrai material biológico da amostra biológica;
- b) se dispõe de pelo menos um reagente específico de um produto de expressão de pelo menos um gene-alvo escolhido dentre os genes-alvo S100A9 e S100A8;
- c) se determina a expressão de pelo menos um dos genes-alvo S100A9 e S100A8, uma superexpressão em relação a um valor limite determinado sendo uma indicação de uma susceptibilidade para contrair uma infecção nosocomial.
- a) se dispõe de uma amostra biológica de um paciente e se extrai material biológico da amostra biológica;
- b) se dispõe de pelo menos um reagente específico de um produto de expressão de pelo menos um gene-alvo escolhido dentre os genes-alvo S100A9 e S100A8;
- c) se determina a expressão de pelo menos um dos genes-alvo S100A9 e S100A8, uma sub-expressão em relação a um valor limite determinado sendo uma indicação de um prognóstico da evolu-ção da síndrome séptica e uma super-expressão em relação a um valor limite determinado sendo uma indicação de um mau prognóstico da evolução da síndrome séptica.
Tabela 3OR : Razão Ímpar
Cl : intervalo de confiança
P : limite de significatividade
Claims (10)
- Processo para determinar a susceptibilidade para contrair uma infecção nosocomial em um paciente que desenvolveu choque séptico, caracterizado pelo fato de que:
- (a) uma amostra biológica é obtida de um paciente e um ácido nucleico ou uma proteína é extraído da amostra biológica;
- (b) pelo menos um reagente específico de um produto de expressão de um gene-alvo, que é o gene-alvo S100A9, é preparado;
- (c) a expressão de pelo menos o gene-alvo S100A9 é determinada, uma superexpressão em relação a um valor limite determinado sendo uma indicação de uma suscetibilidade para contrair uma infecção nosocomial.
- Processo de acordo com a reivindicação 1, caracterizado pelo fato de que a expressão do gene-alvo S100A8 é determinada na etapa (c), por uma superexpressão do gene-alvo S100A8 em relação a um valor limite determinado sendo uma indicação de uma susceptibilidade para contrair uma infecção nosocomial.
- Processo de acordo com a reivindicação 1 ou 2, caracterizado pelo fato de que a amostra biológica foi coletada de um paciente que apresenta uma resposta sistêmica inflamatória associada ou não a uma infecção.
- Processo de acordo com a reivindicação 1 ou 2, caracterizado pelo fato de que a amostra biológica é uma amostra sanguínea.
- Processo de acordo com qualquer uma das reivindicações 1 a 4, caracterizado pelo fato de que o reagente específico do produto de expressão do gene S100A9 compreende dois iniciadores de amplificação específicos do gene-alvo S100A9.
- Processo de acordo com qualquer uma das reivindicações 2 a 4, caracterizado pelo fato de que o reagente específico do produto de expressão do gene S100A8 compreende dois iniciadores de amplificação específicos do gene-alvo S100A8.
- Processo de acordo com qualquer uma das reivindicações 1 a 4, caracterizado pelo fato de que o reagente específico do produto de expressão do gene S100A9 compreende pelo menos uma sonda de hibridização específica do gene-alvo S100A9.
- Processo de acordo com qualquer uma das reivindicações 2 a 4, caracterizado pelo fato de que o reagente específico do produto de expressão do gene S100A8 compreende pelo menos uma sonda de hibridização específica do gene-alvo S100A8.
- Processo de acordo com qualquer uma das reivindicações 1 a 4, caracterizado pelo fato de que o reagente específico do produto de expressão do gene S100A9 compreende pelo menos um anticorpo específico da molécula S100A9.
- Processo de acordo com qualquer uma das reivindicações 2 a 4, caracterizado pelo fato de que o reagente específico do produto de expressão do gene S100A8 compreende pelo menos um anticorpo específico da molécula S100A8.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0950305 | 2009-01-19 | ||
| FR0950306A FR2941240B1 (fr) | 2009-01-19 | 2009-01-19 | Procede pour determiner la sensibilite d'un patient a contracter une infection nosocomiale. |
| FR0950306 | 2009-01-19 | ||
| FR0950305A FR2941239B1 (fr) | 2009-01-19 | 2009-01-19 | Procede pour determiner la susceptibilite a contracter une infection nosocomiale chez un patient presentant une reponse systemique inflammatoire associee ou non a une infection. |
| PCT/FR2010/050070 WO2010082004A1 (fr) | 2009-01-19 | 2010-01-18 | Procedes pour determiner la susceptibilite a contracter une infection nosocomiale chez un patient et pour etablir un pronostic d'evolution d'un syndrome septique |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| BRPI1006850A2 BRPI1006850A2 (pt) | 2016-08-09 |
| BRPI1006850B1 true BRPI1006850B1 (pt) | 2021-04-06 |
| BRPI1006850B8 BRPI1006850B8 (pt) | 2021-07-27 |
Family
ID=42101520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BRPI1006850A BRPI1006850B8 (pt) | 2009-01-19 | 2010-01-18 | processo para determinar a susceptibilidade para contrair infecção nosocomial |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US11299768B2 (pt) |
| EP (1) | EP2379752B1 (pt) |
| JP (2) | JP5832903B2 (pt) |
| KR (2) | KR101834993B1 (pt) |
| CN (2) | CN102301008B (pt) |
| BR (1) | BRPI1006850B8 (pt) |
| ES (1) | ES2556771T3 (pt) |
| MX (1) | MX2011007624A (pt) |
| RU (2) | RU2525707C2 (pt) |
| WO (1) | WO2010082004A1 (pt) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2970975B1 (fr) | 2011-01-27 | 2016-11-04 | Biomerieux Sa | Procede et kit pour determiner in vitro le statut immunitaire d'un individu |
| FR2988479B1 (fr) * | 2012-03-23 | 2014-12-19 | Hospices Civils Lyon | Procede de determination de la susceptibilite aux infections nosocomiales |
| FR3010792B1 (fr) | 2013-09-18 | 2017-03-17 | Biomerieux Sa | Procede d'evaluation du risque de mortalite chez les patients qui presentent une reponse inflammatoire systemique (sirs) ou des syndromes septiques |
| FR3101358A1 (fr) * | 2019-09-27 | 2021-04-02 | Bioaster | Procédé pour déterminer le risque de survenue d’une infection associée aux soins chez un patient |
| RU2743453C1 (ru) * | 2020-07-03 | 2021-02-18 | Федеральное Государственное Бюджетное Научное Учреждение "Федеральный Научно-Клинический Центр Реаниматологии И Реабилитологии" (Фнкц Рр) | Способ прогнозирования инфекционных осложнений критических состояний |
| KR102501195B1 (ko) | 2020-07-21 | 2023-02-21 | 주식회사 카카오헬스케어 | 병원의 의사결정 장치, 방법, 컴퓨터 판독 가능한 기록매체 및 컴퓨터 프로그램 |
| FR3125300A1 (fr) * | 2021-07-19 | 2023-01-20 | Biomerieux | Utilisation du virus torque teno (ttv) en tant que marqueurs pour determiner le risque de complication chez un patient admis au sein d’un etablissement de sante |
| EP4414456A1 (en) | 2023-02-13 | 2024-08-14 | Biomérieux | Method using a transcriptomic score for assessing the clinical outcome of a patient in a clinical setting, and means for its implementation |
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|---|---|
| KR20180026561A (ko) | 2018-03-12 |
| WO2010082004A9 (fr) | 2010-09-30 |
| KR101834993B1 (ko) | 2018-03-06 |
| CN102301008A (zh) | 2011-12-28 |
| RU2011134644A (ru) | 2013-02-27 |
| JP6254975B2 (ja) | 2017-12-27 |
| EP2379752B1 (fr) | 2015-09-30 |
| RU2014122607A (ru) | 2015-12-10 |
| RU2525707C2 (ru) | 2014-08-20 |
| CN103923980A (zh) | 2014-07-16 |
| US20110250592A1 (en) | 2011-10-13 |
| EP2379752A1 (fr) | 2011-10-26 |
| JP5832903B2 (ja) | 2015-12-16 |
| KR20110111491A (ko) | 2011-10-11 |
| US11299768B2 (en) | 2022-04-12 |
| BRPI1006850A2 (pt) | 2016-08-09 |
| CN103923980B (zh) | 2017-01-11 |
| JP2016005453A (ja) | 2016-01-14 |
| WO2010082004A1 (fr) | 2010-07-22 |
| JP2012514993A (ja) | 2012-07-05 |
| RU2663724C2 (ru) | 2018-08-08 |
| CN102301008B (zh) | 2015-05-13 |
| MX2011007624A (es) | 2011-10-12 |
| BRPI1006850B8 (pt) | 2021-07-27 |
| ES2556771T3 (es) | 2016-01-20 |
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