12 research outputs found

    Bioenergetic status and hypoxia in Lewis lung carcinoma assessed by 31P NMR spectroscopy: correlation with tumor progression

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    Aim: Π’o evaluate the hypoxia level and some indices of Lewis lung carcinoma energy metabolism by means of 31Π  NMR spectroscopy in perchloric acid (PCA) tissue extracts during growth of primary tumor and metastasis. Мaterials and Methods: C57Bl/6 mice-bearing Lewis lung carcinoma were used in this study. Tumor energy metabolism was studied by 31P NMR spectroscopy and the metabolic NMR ratios were used as parameters for metabolic status and hypoxia level. Results: It was shown that growth of primary tumor is accompanied with increase of Pi/PCr, Pi/bNΠ’P and PME/bNΠ’P ratios that reflect drop of tumor energy status and oxygenation level in tumor tissue. These changes in relevant metabolic ratios correlate with enlargement of primary tumor volume (r = 0.87, p = 0.0045; r = 0.90, p = 0.0012; r = 0.764, p = 0.05, respectively) as well as with the number of lung metastases (rs = 0.761, p = 0.028; rs = 0.86, p = 0.0049; rs = 0.77, p = 0.040, respectively). Conclusion: In present study it was shown that 31Π  NMR spectroscopy of PCA tumor tissue extracts may be used as reliable method for the assessment of the level of oxygenation as well as changes in energy metabolism in the experimental tumors. It may be helpful to evaluate the energy status of human tumors by investigation both of biopsy and surgical specimens. Hypoxia and hypoxia-associated metabolic events in primary tumor are linked with malignant progression, in particular metastasis.ЦСль: ΠΎΠΏΡ€Π΅Π΄Π΅Π»ΠΈΡ‚ΡŒ ΡƒΡ€ΠΎΠ²Π΅Π½ΡŒ гипоксии ΠΈ Π½Π΅ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ ΠΏΠΎΠΊΠ°Π·Π°Ρ‚Π΅Π»ΠΈ энСргСтичСского ΠΌΠ΅Ρ‚Π°Π±ΠΎΠ»ΠΈΠ·ΠΌΠ° ΠΊΠ°Ρ€Ρ†ΠΈΠ½ΠΎΠΌΡ‹ Π»Π΅Π³ΠΊΠΎΠ³ΠΎ Π›ΡŒΡŽΠΈΡ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ 31Π  ЯМР-спСктроскопии ΠΏΠ΅Ρ€Ρ…Π»ΠΎΡ€Π½Ρ‹Ρ… (РБА) экстрактов Ρ‚ΠΊΠ°Π½ΠΈ Π² процСссС роста ΠΏΠ΅Ρ€Π²ΠΈΡ‡Π½ΠΎΠΉ ΠΎΠΏΡƒΡ…ΠΎΠ»ΠΈ ΠΈ Π΅Π΅ мСтастазировании. МaΡ‚Π΅Ρ€ΠΈΠ°Π»Ρ‹ ΠΈ ΠΌΠ΅Ρ‚ΠΎΠ΄Ρ‹: использовали Π² исслСдовании ΠΌΡ‹ΡˆΠ΅ΠΉ C57Bl/6 с ΠΏΠ΅Ρ€Π΅Π²ΠΈΠ²Π½ΠΎΠΉ ΠΊΠ°Ρ€Ρ†ΠΈΠ½ΠΎΠΌΠΎΠΉ Π»Π΅Π³ΠΊΠΎΠ³ΠΎ Π›ΡŒΡŽΠΈΡ. ЭнСргСтичСский ΠΌΠ΅Ρ‚Π°Π±ΠΎΠ»ΠΈΠ·ΠΌ ΠΎΠΏΡƒΡ…ΠΎΠ»ΠΈ ΠΈΠ·ΡƒΡ‡Π°Π»ΠΈ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ ЯМР спСктроскопии, oΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΡ фосфорсодСрТащих ΠΌΠ΅Ρ‚Π°Π±ΠΎΠ»ΠΈΡ‚ΠΎΠ² использовали Π² качСствС ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€ΠΎΠ² мСтаболичСского статуса ΠΈ уровня гипоксии. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹: установлСно, Ρ‡Ρ‚ΠΎ рост ΠΏΠ΅Ρ€Π²ΠΈΡ‡Π½ΠΎΠΉ ΠΎΠΏΡƒΡ…ΠΎΠ»ΠΈ сопровоТдаСтся ΡƒΠ²Π΅Π»ΠΈΡ‡Π΅Π½ΠΈΠ΅ΠΌ ΡΠΎΠΎΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΠΉ Pi/PCr, Pi/Ξ²NΠ’P and PME/Ξ²NΠ’P Π² ΠΎΠΏΡƒΡ…ΠΎΠ»ΠΈ, Ρ‡Ρ‚ΠΎ ΠΎΡ‚Ρ€Π°ΠΆΠ°Π΅Ρ‚ сниТСниС уровня биоэнСргСтичСского статуса ΠΈ уровня оксигСнации Π² ΠΎΠΏΡƒΡ…ΠΎΠ»ΠΈ. Π­Ρ‚ΠΈ измСнСния ΡΠΎΠΎΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΠΉ Π²Π°ΠΆΠ½Ρ‹Ρ… мСтаболичСских ΠΏΠΎΠΊΠ°Π·Π°Ρ‚Π΅Π»Π΅ΠΉ ΠΊΠΎΡ€Ρ€Π΅Π»ΠΈΡ€ΡƒΡŽΡ‚ с ΡƒΠ²Π΅Π»ΠΈΡ‡Π΅Π½ΠΈΠ΅ΠΌ объСма ΠΏΠ΅Ρ€Π²ΠΈΡ‡Π½ΠΎΠΉ ΠΎΠΏΡƒΡ…ΠΎΠ»ΠΈ (r = 0,87, p = 0,0045; r = 0,90, p = 0,0012; r = 0,764, p = 0,05 соотвСтствСнно) ΠΈ количСством ΠΌΠ΅Ρ‚Π°Ρ‚Π°Π·ΠΎΠ² Π² Π»Π΅Π³ΠΊΠΈΡ… (rs = 0,761, p = 0,028; rs = 0,86, p = 0,0049; rs = 0,77, p = 0,040 соотвСтствСнно). Π’Ρ‹Π²ΠΎΠ΄Ρ‹: установлСно, Ρ‡Ρ‚ΠΎ 31Π  ЯМР-спСктроскопия PCA Ρ‚ΠΊΠ°Π½Π΅Π²Ρ‹Ρ… экстрактов ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ Π½Π°Π΄Π΅ΠΆΠ½Ρ‹ΠΌ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ ΠΎΡ†Π΅Π½ΠΊΠΈ уровня оксигСнации ΠΈ биоэнСргСтичСского статуса ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… ΠΎΠΏΡƒΡ…ΠΎΠ»Π΅ΠΉ. Π­Ρ‚ΠΎΡ‚ ΠΌΠ΅Ρ‚ΠΎΠ΄ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ ΠΏΠΎΠ»Π΅Π·Π½Ρ‹ΠΌ ΠΏΡ€ΠΈ ΠΎΡ†Π΅Π½ΠΊΠ΅ энСргСтичСского ΠΌΠ΅Ρ‚Π°Π±ΠΎΠ»ΠΈΠ·ΠΌΠ° ΠΎΠΏΡƒΡ…ΠΎΠ»Π΅ΠΉ Ρ‡Π΅Π»ΠΎΠ²Π΅ΠΊΠ°, Π² частности ΠΏΡ€ΠΈ исслСдовании биопсийного ΠΈ ΠΎΠΏΠ΅Ρ€Π°Ρ†ΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π°. Гипоксия ΠΈ гипоксия-ассоциированныС измСнСния ΠΌΠ΅Ρ‚Π°Π±ΠΎΠ»ΠΈΠ·ΠΌΠ° Π² ΠΏΠ΅Ρ€Π²ΠΈΡ‡Π½ΠΎΠΉ ΠΎΠΏΡƒΡ…ΠΎΠ»ΠΈ связаны со злокачСствСнной прогрСссиСй, Π² частности с мСтастазированиСм

    An arsenal of magnetic nanoparticles; Perspectives in the treatment of cancer

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    Nanomedicine is an emerging field, which constitutes a new direction in the treatment of cancer. Magnetic nanoparticles (MNPs) can circumvent vascular tissue to concentrate at the site of the tumor. Under the influence of an external, alternating magnetic field, MNPs generate high temperatures within the tumor and ablate malignant cells while inflicting minimal damage to healthy host tissue. Due to their theranostic properties, they constitute a promising candidate for the treatment of cancer. A critical review of the type, size and therapeutic effect of different MNPs is presented, following an appraisal of the literature in the last 5 years. This is a multibillion dollar industry, with a few studies moving to clinical trials within the next 5 years
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