Fasica dos tumores: as células cancerosas se fluidificam e se comprimem atravanãs do tecido
Os pesquisadores descobriram que as células ma³veis trabalham juntas para fluidificar o tecido tumoral.
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)
Pesquisadores da Universidade de Leipzig encontraram regiaµes sãolidas e fluidas em tumores de mama e cervicais. As regiaµes de fluido podem ser reconhecidas por células alongadas que se comprimem atravanãs do denso tecido tumoral. Crédito: Steffen Grosser, Universidade de Leipzig
Trabalhando com colegas da Alemanha e dos Estados Unidos, pesquisadores da Universidade de Leipzig conseguiram um grande avanço na pesquisa sobre como as células cancerosas se propagam. Em experimentos, a equipe de biofasicos liderada pelo professor Josef Alfons Ka¤s, Steffen Grosser e Ja¼rgen Lippoldt demonstrou pela primeira vez como as células se deformam para se moverem em tecidos tumorais densos e se espremerem pelas células vizinhas. Os pesquisadores descobriram que as células ma³veis trabalham juntas para fluidificar o tecido tumoral.
Ka¤s liderou o projeto de pesquisa em cooperação com a Professora Lisa Manning da Syracuse University (EUA) e a Professora Bahriye Aktas do Hospital Universita¡rio de Leipzig. Eles agora publicaram suas descobertas na Physical Review X , uma importante revista que publica principalmente resultados de pesquisas inovadoras.
"Essas primeiras observações de uma transição de fase em tumores humanos mudam nossos conceitos ba¡sicos de progressão tumoral e podem melhorar o diagnóstico e a terapia do câncer ", disse Ka¤s, que hános estuda as propriedades físicas das células cancerosas . Ele disse que a pesquisa mostrou que os tumores humanos contem aglomerados de células sãolidas e fluidas, o que seria um grande avanço na compreensão dos cientistas sobre a meca¢nica do tumor. Ele acrescentou que os resultados formam a base para o primeiro procedimento com o qual células cancerosas metasta¡ticas já podem ser detectadas no tumor.
Em amostras de tumor de pacientes do Hospital Universita¡rio de Leipzig, os pesquisadores encontraram regiaµes com células ma³veis, bem como regiaµes esta¡veis, semelhantes a sãolidos, sem movimento celular. Do ponto de vista fasico, as células não deveriam ser capazes de se mover na densa massa tumoral - os tumores são tão densamente povoados de células que o movimento seria inibido em qualquer material tapico.
Os pesquisadores, portanto, desenvolveram uma nova abordagem para microscopia de tumor ao vivo pela coloração fluorescente de amostras de tumor humano imediatamente após a cirurgia, permitindo-lhes observar o movimento celular ao vivo. Isso os levou a descobrir que, ao contra¡rio de todas as descobertas anteriores, essa motilidade celular realmente ocorre e estãoassociada a uma forte deformação nuclear. Eles observaram como as células e seus núcleos literalmente se comprimem atravanãs do tecido , tornando-se gravemente deformados.
"As células nos tecidos biola³gicos se comportam de maneira muito semelhante a s pessoas em um bar. Em baixas densidades, elas podem se mover livremente. No entanto, o movimento se torna difacil quando as coisas ficam muito lotadas. Mas mesmo em um bar lotado, vocêainda pode passar se virar de lado. Este éexatamente o efeito que vemos nos tecidos tumorais ", disse Ka¤s. Os pesquisadores acreditam que essa transição de fase explica como as células podem se mover e se multiplicar em um tumor, levando a meta¡stase. Os tecidos fluidos mostraram células e núcleos alongados e deformados . Imagens esta¡ticas de células alongadas e formas nucleares poderiam servir como uma impressão digital para a agressividade metasta¡tica de um tumor.
"Estes são resultados espetaculares do campo da física do ca¢ncer. Agora precisamos investigar se as regiaµes do fluido podem prever a agressividade do tumor. Aqui encontramos um marcador de câncer que indica regiaµes ativas e ma³veis e que se baseia em um mecanismo fasico simples", afirmou. disse Steffen Grosser. O professor Ka¤s estãoatualmente embarcando em um ensaio clanico para investigar o potencial da canãlula e da forma nuclear como um novo marcador tumoral que poderia ser usado para examinar e tratar pacientes de uma forma muito mais direcionada do que antes.