54 research outputs found
ΠΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΊΠ°ΡΠΏΠ°Π·Ρ-2 Π² ΠΊΠ»Π΅ΡΠΊΠ°Ρ Π’-ΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠΉ Π»ΠΈΠΌΡΠΎΠΌΡ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° Jurkat ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ ΠΏΠ΅ΡΠ΅ΠΊΠ»ΡΡΠ°ΡΡΠ΅Π³ΠΎ ΡΠΏΠ»Π°ΠΉΡΠΈΠ½Π³ ΠΎΠ»ΠΈΠ³ΠΎΠ½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄Π° ΠΊ Π΅Ρ ΠΏΡΠ΅-ΠΌΠ ΠΠ
Caspase-2 is a key enzyme thinvolved in induction of apoptosis. The caspase-2 level is regulated by alternative splicing (AS) of its mRNA. The aim of this work was to determine the ability of an oligonucleotide complementary to Casp-2 pre-mRNA to induce AS. This oligonucleotide blocked the binding of splicing-regulating proteins to their sites at the end of exon 9 of Casp-2 pre-mRNA, leading to induction of AS of Casp-2 mRNA. The decrease in expression of full-size active splice-variant (Casp-2L) and the increase the expression of a shortened variant (Casp-2S) was demonstrated in human T-cell lymphoma Jurkat cell line. The expression level of total Casp-2 remained unchanged. Disproportion of splice variants of Casp-2 led to inhibition of enzymatic activity of caspase-2.ΠΠ°ΡΠΏΠ°Π·Π°-2 ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠ΅ΡΠΌΠ΅Π½ΡΠΎΠΌ, ΡΡΠ°ΡΡΠ²ΡΡΡΠΈΠΌ Π² ΠΈΠ½Π΄ΡΠΊΡΠΈΠΈ Π°ΠΏΠΎΠΏΡΠΎΠ·Π°. ΠΠΎΠ»ΠΈΡΠ΅ΡΡΠ²ΠΎ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠ΅ΡΠΌΠ΅Π½ΡΠ° ΠΊΠ°ΡΠΏΠ°Π·Ρ-2 ΡΠ΅Π³ΡΠ»ΠΈΡΡΠ΅ΡΡΡ Π°Π»ΡΡΠ΅ΡΠ½Π°ΡΠΈΠ²Π½ΡΠΌ ΡΠΏΠ»Π°ΠΉΡΠΈΠ½Π³ΠΎΠΌ (ΠΠ‘) Π΅Ρ ΠΌΠ ΠΠ. Π¦Π΅Π»ΡΡ Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ Π±ΡΠ»ΠΎ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΠΈ ΠΎΠ»ΠΈΠ³ΠΎΠ½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄Π°, ΠΊΠΎΠΌΠΏΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠ΅-ΠΌΠ ΠΠ Casp-2, ΠΈΠ½Π΄ΡΡΠΈΡΠΎΠ²Π°ΡΡ ΠΠ‘. ΠΠ°Π½Π½ΡΠΉ ΠΎΠ»ΠΈΠ³ΠΎΠ½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄ Π±Π»ΠΎΠΊΠΈΡΠΎΠ²Π°Π» ΡΠ²ΡΠ·ΡΠ²Π°Π½ΠΈΠ΅ ΡΠ΅Π³ΡΠ»ΠΈΡΡΡΡΠΈΡ
ΡΠΏΠ»Π°ΠΉΡΠΈΠ½Π³ Π±Π΅Π»ΠΊΠΎΠ² ΡΠΎ ΡΠ²ΠΎΠΈΠΌΠΈ ΡΠ°ΠΉΡΠ°ΠΌΠΈ Π½Π° ΠΊΠΎΠ½ΡΠ΅ ΡΠΊΠ·ΠΎΠ½Π° 9 ΠΏΡΠ΅-ΠΌΠ ΠΠ Casp-2, ΡΡΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΠ»ΠΎ ΠΊ ΠΈΠ½Π΄ΡΠΊΡΠΈΠΈ ΠΠ‘ ΠΌΠ ΠΠ Casp-2: ΠΏΠΎΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ ΠΏΠΎΠ»Π½ΠΎΡΠ°Π·ΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΏΠ»Π°ΠΉΡ-Π²Π°ΡΠΈΠ°Π½ΡΠ° Casp-2L ΠΈ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ ΡΠΊΠΎΡΠΎΡΠ΅Π½Π½ΠΎΠ³ΠΎ Π²Π°ΡΠ°Π½ΡΠ° Casp-2S Π² ΠΊΠ»Π΅ΡΠΊΠ°Ρ
Π’-ΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠΉ Π»ΠΈΠΌΡΠΎΠΌΡ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° Π»ΠΈΠ½ΠΈΠΈ Jurkat. ΠΡΠΈ ΡΡΠΎΠΌ ΡΡΠΎΠ²Π΅Π½Ρ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ ΠΎΠ±ΡΠ΅ΠΉ Casp-2 Π½Π΅ ΠΈΠ·ΠΌΠ΅Π½ΡΠ»ΡΡ. ΠΠ°ΡΡΡΡΠ΅Π½ΠΈΠ΅ ΠΏΡΠΎΠΏΠΎΡΡΠΈΠΈ ΡΠΏΠ»Π°ΠΉΡ-Π²Π°ΡΠΈΠ°Π½ΡΠΎΠ² Casp-2 ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΠ» ΠΊ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ΅ΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠ²Π½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΊΠ°ΡΠΏΠ°Π·Ρ-2
Observation Of Very High Energy Cosmic-ray Families In Emulsion Chambers At High Mountain Altitudes (i)
Characteristics of cosmic-ray hadronic interactions in the 1015 - 1017 eV range are studied by observing a total of 429 cosmic-ray families of visible energy greater than 100 TeV found in emulsion chamber experiments at high mountain altitudes, Chacaltaya (5200 m above sea level) and the Pamirs (4300 m above sea level). Extensive comparisons were made with simulated families based on models so far proposed, concentrating on the relation between the observed family flux and the behaviour of high-energy showers in the families, hadronic and electromagnetic components. It is concluded that there must be global change in characteristics of hadronic interactions at around 1016 eV deviating from thise known in the accelerator energy range, specially in the forwardmost angular region of the collision. A detailed study of a new shower phenomenon of small-pT particle emissions, pT being of the order of 10 MeV/c, is carried out and its relation to the origin of huge "halo" phenomena associated with extremely high energy families is discussed as one of the possibilities. General characteristics of such super-families are surveyed. Β© 1992.3702365431Borisov, (1981) Nucl. Phys., 191 BBaybrina, (1984) Trudy FIAN 154, p. 1. , [in Russian], Nauka, MoscowLattes, Hadronic interactions of high energy cosmic-ray observed by emulsion chambers (1980) Physics Reports, 65, p. 151Hasegawa, ICR-Report-151-87-5 (1987) presented at FNAL CDF Seminar, , Inst. for Cosmic Ray Research, Univ. of TokyoCHACALTAYA Emulsion Chamber Experiment (1971) Progress of Theoretical Physics Supplement, 47, p. 1Yamashita, Ohsawa, Chinellato, (1984) Proc. 3rd Int. Symp. on Cosmic Rays and Particle Physics, p. 30. , Tokyo, 1984, Inst. for Cosmic Ray Research, Univ. of Tokyo(1984) Proc. 3rd Int. Symp. on Cosmic Rays and Particle Physics, p. 1. , Tokyo, 1984Baradzei, (1984) Proc. 3rd Int. Symp. on Cosmic Rays and Particle Physics, p. 136. , Tokyo, 1984Yamashita, (1985) J. Phys. Soc. Jpn., 54, p. 529Bolisov, (1984) Proc. 3rd Int. Symp. on Cosmic rays and Particle Physics, p. 248. , Tokyo, 1984, Inst. for Cosmic Ray Research, Univ. of TokyoTamada, Tomaszewski, (1988) Proc. 5th Int. Symp. on Very High Energy Cosmic-Ray Interactions, p. 324. , Lodz, 1988, Inst. for Cosmic Ray Research, Univ. of Tokyo, PolandHasegawa, (1989) ICR-Report-197-89-14, , Inst. for Cosmic Ray Research, Univ. of TokyoCHACALTAYA Emulsion Chamber Experiment (1971) Progress of Theoretical Physics Supplement, 47, p. 1Okamoto, Shibata, (1987) Nucl. Instrum. Methods, 257 A, p. 155Zhdanov, (1980) FIAN preprint no. 45, , Lebedev Physical Institute, MoscowSemba, Gross Features of Nuclear Interactions around 1015eV through Observation of Gamma Ray Families (1983) Progress of Theoretical Physics Supplement, 76, p. 111Nikolsky, (1975) Izv. Akad. Nauk. USSR Ser. Fis., 39, p. 1160Burner, Energy spectra of cosmic rays above 1 TeV per nucleon (1990) The Astrophysical Journal, 349, p. 25Takahashi, (1990) 6th Int. Symp. on Very High Energy Cosmic-ray Interactions, , Tarbes, FranceRen, (1988) Phys. Rev., 38 D, p. 1404Alner, The UA5 high energy simulation program (1987) Nuclear Physics B, 291 B, p. 445Bozzo, Measurement of the proton-antiproton total and elastic cross sections at the CERN SPS collider (1984) Physics Letters B, 147 B, p. 392Wrotniak, (1985) Proc. 19th Cosmic-Ray Conf. La Jolla, 1985, 6, p. 56. , NASA Conference Publication, Washington, D.CWrotniak, (1985) Proc. 19th Cosmic-Ray Conf. La Jolla, 1985, 6, p. 328. , NASA Conference Publication, Washington, D.CMukhamedshin, (1984) Trudy FIAN, 154, p. 142. , Nauka, Moscow, [in Russian]Dunaevsky, Pluta, Slavatinsky, (1988) Proc. 5th Int. Symp. on Very High Energy Cosmic-Ray Interactions, p. 143. , Lodz, 1988, Inst. of Physics, Univ. of Lodz, PolandKaidalov, Ter-Martirosyan, (1987) Proc. 20th Int. Cosmic-Ray Conf., Moscow, 1987, 5, p. 141. , Nauka, MoscowShabelsky, (1985) preprints LNPI-1113Shabelsky, (1986) preprints LNPI-1224, , Leningrad [in Russian]Hillas, (1979) Proc. 16th Int. Cosmic-Ray Conf., Kyoto, 6, p. 13. , Inst. for Cosmic Ray Research, Univ. of TokyoBorisov, (1987) Phys. Lett., 190 B, p. 226Hasegawa, Tamada, (1990) 6th Int. Symp. on Very High Energy Cosmic-Ray Interactions, , Tarbes, FranceSemba, Gross Features of Nuclear Interactions around 1015eV through Observation of Gamma Ray Families (1983) Progress of Theoretical Physics Supplement, p. 111Ren, (1988) Phys. Rev., 38 D, p. 1404Dynaevsky, Zimin, (1988) Proc. 5th Int. Symp. on Very High Energy Cosmic-Ray Interaction, p. 93. , Lodz, 1988, Inst. of Physics, Univ. of Lodz, PolandDynaevsky, (1990) Proc. 6th Int. Symp. on Very High Energy Cosmic-Ray Interactions, , Tarbes, France(1989) FIAN preprint no. 208, , Lebedev Physical Institute, Moscow(1990) Proc. 21st Int. Cosmic-Ray Conf., Adelaide, 8, p. 259. , Dept. Physics and Mathematical Physics, Univ. of Adelaide, AustraliaHasegawa, (1990) ICR-Report-216-90-9, , Inst. for Cosmic-Ray Research, Univ. of TokyoTamada, (1990) Proc. 21st Int. Cosmic-Ray Conf., Adelaide, 1990, 8. , Dept. Physics and Mathematical Physics, Univ. of Adelaide, AustraliaTamada, (1990) ICR-Report-216-90-9(1981) Proc. 17th Int. Cosmic-Ray Conf., Paris, 5, p. 291(1990) Proc. Int. Cosmic-Ray Conf., Adelaide, 1990, 8, p. 267. , Dept. Physics and Mathematical Physics, Univ. of Adelaide, Australia(1989) Inst. Nucl. Phys. 89-67/144, , preprint, Inst. Nucl. Phys., Moscow State UnivSmilnova, (1988) Proc. 5th Int. Sym. on Very High Energy Cosmic-Ray Interactions, p. 42. , Lodz, 1988, Inst. of Physics, Univ. of Lodz, PolandGoulianos, (1986) Proc. Workshop of Particle Simulation at High Energies, , University of Wisconsin, Madison, USAIvanenko, (1983) Proc. 18th Int. Cosmic-Ray Conf., Bangalore, 1983, 5, p. 274. , Tata Inst. Fundamental Research, Bombay, IndiaIvanenko, (1984) Proc. Int. Symp. on Cosmic-Rays and Particle Physics, p. 101. , Tokyo, 1984, Inst. for Cosmic Ray Research, Univ. of Tokyo(1988) 5th Int. Symp. on Very High Energy Cosmic-Ray Interactions, p. 180. , Lodz, 1988, Inst. of Physics, Univ. of Lodz, Poland(1990) Proc. 21st Int. Cosmic-Ray Conf., Adelaide, 1990, 8, p. 251. , Dept. Physics and Mathematical Physics, Univ. of Adelaide, Australia(1991) Izv. AN USSR No. 4, , to be publishedNikolsky, Shaulov, Cherdyntseva, (1990) FIAN preprint no. 140, , Lebedev Physical Institute, Moscow, [in Russian](1987) Proc. 20th Int. Cosmic-Ray Conf., Moscow, 1987, 5, p. 326. , Nauka, Mosco
Observation Of A High-energy Cosmic-ray Family Caused By A Centauro-type Nuclear Interaction In The Joint Emulsion Chamber Experiment At The Pamirs
An exotic cosmic-ray family event is observed in the large emulsion chamber exposed by the joint at the Pamirs (4360 m above sea level). The family is composed of 120Ξ³-ray-induced showers and 37 hadron-induced showers with individual visible energy exceeding 1 TeV. The decisive feature of the event is the hadron dominance: Ξ£EΞ³, Ξ£E(Ξ³) h, γEΞ³, γE(Ξ³) hγ, γEΞ³Β·RΞ³γ and γE(Ξ³)Β·Rhγ being 298 TeV, 476 TeV, 2.5 TeV, 12.9 TeV, 28.6 GeV m and 173 GeV m, respectively. Most probably the event is due to a Centauro interaction, which occured in the atmosphere at βΌ700 m above the chamber. The event will constitute the second beautiful candidate for a Centauro observed at the Pamirs. Β© 1987.1901-2226233Bayburina, (1981) Nucl. Phys. B, 191, p. 1Lattes, Fujimoto, Hasegawa, Hadronic interactions of high energy cosmic-ray observed by emulsion chambers (1980) Physics Reports, 65, p. 151(1984) Trudy FIAN, 154, p. 1Borisov, (1984) Proc. Intern. Symp. on Cosmic rays and particle physics, p. 3. , TokyoRen, (1985) 19th Intern. Cosmic ray Conf., 6, p. 317. , La JollaYamashita, (1985) 19th Intern. Cosmic ray Conf., 6, p. 364. , La JollaTamada, (1977) Nuovo Cimento, 41 B, p. 245T. Shibata et al., to be publishedHillas, (1979) 16th Intern. Cosmic ray Conf., 6, p. 13. , KyotoBattiston, Measurement of the proton-antiproton elastic and total cross section at a centre-of-mass energy of 540 GeV (1982) Physics Letters B, 117, p. 126UA5 Collab., G.J. Alner et al., preprint CERN-EP/85-62Taylor, (1976) Phys. Rev. D, 14, p. 1217Burnett, (1984) Proc. Intern. Symp. on Cosmic rays and particle physics, p. 468. , Toky
Nuclear Interactions Of Super High Energy Cosmic-rays Observed In Mountain Emulsion Chambers
Here we present a summary of joint discussions on the results of three mountain experiments with large-scale emulsion chambers, at Pamir, Mt. Fuji and Chacaltaya. Observations cover gamma quanta, hadrons and their clusters (called "families"). The following topics are covered, concerning the characteristics of nuclear interactions the energy region 1014-1016 eV: (i) rapid dissipation seen in atmospheric diffusion of high-energy cosmic-rays; (ii) multiplicity and Pt increase in produced pi-mesons in the fragmentation region; (iii) existence of large-Pt jets, (iv) extremely hadron-rich family of the Centauro type; (v) exotic phenomena in the extremely high energy region beyond 1016 eV. Β© 1981.1911125(1977) Acta Univ. Lodz ser. II, (60)(1973) 13th Int. Cosmic-ray Conf., 3, p. 2228(1975) 14th Int. Cosmic-Ray Conf., 7, p. 2365(1979) AIP Conf. Proc. no. 49, p. 334(1979) 16th Int. Cosmic-ray Conf., 6, p. 344(1979) 16th Int. Cosmic-ray Conf., 7, p. 6816th Int. Cosmic-ray Conf. (1979) 16th Int. Cosmic-ray Conf., 7, p. 284(1979) 16th Int. Cosmic-ray Conf., 7, p. 294(1979) 16th Int. Cosmic-ray Conf., 13, p. 87(1979) 16th Int. Cosmic-ray Conf., 13, p. 92(1979) 16th Int. Cosmic-ray Conf., 13, p. 98(1979) AIP Conf. Proc. no. 49, p. 94(1979) AIP Conf. Proc. no. 49, p. 145(1979) AIP Conf. Proc. no. 49, p. 317(1979) 16th Int. Cosmic-ray Conf., 6, p. 350(1979) 16th Int. Cosmic-ray Conf., 6, p. 356(1979) 16th Int. Cosmic-ray Conf., 6, p. 362Nikolsky, Proc. 9th Int. High-energy Symp. (1978) CSSR, 21. , ToborMiyake, (1978) Proc. 19th Int. Conf. on High-energy physics, p. 433Vernov, (1977) Physica, 3, p. 1601Khristiansen, (1978) JETP Lett., 28, p. 124(1973) 13th Int. Cosmic-ray Conf., 3, p. 2219Izv. Acad. Nauk USSR, ser Phys. (1974) Izv. Acad. Nauk USSR, ser Phys., 38, p. 918(1975) 14th Int. Cosmic-ray Conf., 7, p. 2365(1979) 16th Int. Cosmic-ray Conf., 7, p. 68Dunaevsky, Urysson, Emelyanov, Shorin, Tashimov, (1975) FIAN preprint no. 150Dunaevsky, Urysson, Emelyanov, Shorin, Tashinov, (1979) Acta Univ. Lodz ser. II, (60), p. 199Ivanenko, Kanevskya, Roganova, (1978) JETP Lett., 40, p. 704Ivanenko, Kanevsky, Roganova, (1979) 16th Int. Cosmic-ray Conf., 7, p. 101Ivanenko, Kanevsky, Roganova, (1979) 16th Int. Cosmic-ray Conf., 7, p. 198Wrotniak, (1977) Acta Univ. Lodz ser. II, (60), p. 165Krys, Tomaszevski, Wrotniak, (1979) 16th Int. Cosmic-ray Conf., 7, p. 182Krys, Tomaszevski, Wrotniak, (1979) 16th Int. Cosmic-ray Conf., 7, p. 186Fomin, Kempa, Khristiansen, Levina, Piotrowska, Wdowczyk, (1977) 15th Int. Cosmic-ray Conf., 7, p. 248Fomin, Kempa, Khristiansen, Levina, Piotrowska, Wdowczyk, (1979) 16th Int. Cosmic-ray Conf., 13, p. 82Azimov, Mullazhanov, Yuldashbayev, (1979) 16th Int. Cosmic-ray Conf., 7, p. 262Azimov, Mullazhanov, Yuldashbayev, (1977) Acta Univ. Lodz ser. II, (60), p. 275Kasahara, Torri, Yuda, (1979) 16th Int. Cosmic-ray Conf., 13, p. 70Kasahara, Torii, Yuda, (1979) 16th Int. Cosmic-ray Conf., 13, p. 79Shibata, (1979) 16th Int. Cosmic-ray Conf., 7, p. 176H. Semba, T. Shibata and T. Tabuki, Suppl. Prog. Theor. Phys., to be publishedZhdanov, Roinishvilli, Smorodin, Tomaszevski, (1975) FIAN preprint no. 163Lattes, Fujimoto, Hasegawa, Hadronic interactions of high energy cosmic-ray observed by emulsion chambers (1980) Physics Reports, 65, p. 152Ellsworth, Gaisser, Yodh, (1981) Phys. Rev., 23 D, p. 764Baradzei, Smorodin, (1974) FIAN preprint nos. 103, 104Baradzei, Smorodin, (1977) Acta Univ. Lodz ser. II, (60), p. 51Zhdanov, (1980) FIAN preprint no. 140H. Semba, T. Shibata and T. Tabuki, Suppl. Prog. Theor. Phys., to be publishedShibata, (1980) Phys. Rev., 22 D, p. 100Slavatinsky, (1980) Proc. 7th European Symp. on Cosmic rays, , Leningrad, to be published(1979) AIP Conference Proc. no. 49, p. 145Azimov, Abduzhamilov, Chudakov, (1963) JETP (Sov. Phys.), 45, p. 40713th Int. Cosmic-ray Conf. (1973) 13th Int. Cosmic-ray Conf., 5, p. 326Acharya, Rao, Sivaprasad, Rao, (1979) 16th Int. Cosmic-ray Conf., 6, p. 289Ellsworth, Goodman, Yodh, Gaisser, Stanev, (1981) Phys. Rev., 23 D, p. 771Bariburina, Guseva, Denisova, (1980) Acta Univ. Lodz, 1, p. 9415th Int. Cosmic-ray Conf. (1977) 15th Int. Cosmic-ray Conf., 7, p. 184(1979) AIP Conf. Proc. no. 49, p. 33
ΠΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΊΠ°ΡΠΏΠ°Π·Ρ-2 Π² ΠΊΠ»Π΅ΡΠΊΠ°Ρ Π’-ΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠΉ Π»ΠΈΠΌΡΠΎΠΌΡ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° Jurkat ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ ΠΏΠ΅ΡΠ΅ΠΊΠ»ΡΡΠ°ΡΡΠ΅Π³ΠΎ ΡΠΏΠ»Π°ΠΉΡΠΈΠ½Π³ ΠΎΠ»ΠΈΠ³ΠΎΠ½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄Π° ΠΊ Π΅Ρ ΠΏΡΠ΅-ΠΌΠ ΠΠ
Caspase-2 is a key enzyme thinvolved in induction of apoptosis. The caspase-2 level is regulated by alternative splicing (AS) of its mRNA. The aim of this work was to determine the ability of an oligonucleotide complementary to Casp-2 pre-mRNA to induce AS. This oligonucleotide blocked the binding of splicing-regulating proteins to their sites at the end of exon 9 of Casp-2 pre-mRNA, leading to induction of AS of Casp-2 mRNA. The decrease in expression of full-size active splice-variant (Casp-2L) and the increase the expression of a shortened variant (Casp-2S) was demonstrated in human T-cell lymphoma Jurkat cell line. The expression level of total Casp-2 remained unchanged. Disproportion of splice variants of Casp-2 led to inhibition of enzymatic activity of caspase-2.ΠΠ°ΡΠΏΠ°Π·Π°-2 ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠ΅ΡΠΌΠ΅Π½ΡΠΎΠΌ, ΡΡΠ°ΡΡΠ²ΡΡΡΠΈΠΌ Π² ΠΈΠ½Π΄ΡΠΊΡΠΈΠΈ Π°ΠΏΠΎΠΏΡΠΎΠ·Π°. ΠΠΎΠ»ΠΈΡΠ΅ΡΡΠ²ΠΎ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠ΅ΡΠΌΠ΅Π½ΡΠ° ΠΊΠ°ΡΠΏΠ°Π·Ρ-2 ΡΠ΅Π³ΡΠ»ΠΈΡΡΠ΅ΡΡΡ Π°Π»ΡΡΠ΅ΡΠ½Π°ΡΠΈΠ²Π½ΡΠΌ ΡΠΏΠ»Π°ΠΉΡΠΈΠ½Π³ΠΎΠΌ (ΠΠ‘) Π΅Ρ ΠΌΠ ΠΠ. Π¦Π΅Π»ΡΡ Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ Π±ΡΠ»ΠΎ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡΠΈ ΠΎΠ»ΠΈΠ³ΠΎΠ½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄Π°, ΠΊΠΎΠΌΠΏΠ»Π΅ΠΌΠ΅Π½ΡΠ°ΡΠ½ΠΎΠ³ΠΎ ΠΏΡΠ΅-ΠΌΠ ΠΠ Casp-2, ΠΈΠ½Π΄ΡΡΠΈΡΠΎΠ²Π°ΡΡ ΠΠ‘. ΠΠ°Π½Π½ΡΠΉ ΠΎΠ»ΠΈΠ³ΠΎΠ½ΡΠΊΠ»Π΅ΠΎΡΠΈΠ΄ Π±Π»ΠΎΠΊΠΈΡΠΎΠ²Π°Π» ΡΠ²ΡΠ·ΡΠ²Π°Π½ΠΈΠ΅ ΡΠ΅Π³ΡΠ»ΠΈΡΡΡΡΠΈΡ
ΡΠΏΠ»Π°ΠΉΡΠΈΠ½Π³ Π±Π΅Π»ΠΊΠΎΠ² ΡΠΎ ΡΠ²ΠΎΠΈΠΌΠΈ ΡΠ°ΠΉΡΠ°ΠΌΠΈ Π½Π° ΠΊΠΎΠ½ΡΠ΅ ΡΠΊΠ·ΠΎΠ½Π° 9 ΠΏΡΠ΅-ΠΌΠ ΠΠ Casp-2, ΡΡΠΎ ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΠ»ΠΎ ΠΊ ΠΈΠ½Π΄ΡΠΊΡΠΈΠΈ ΠΠ‘ ΠΌΠ ΠΠ Casp-2: ΠΏΠΎΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ ΠΏΠΎΠ»Π½ΠΎΡΠ°Π·ΠΌΠ΅ΡΠ½ΠΎΠ³ΠΎ Π°ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠΏΠ»Π°ΠΉΡ-Π²Π°ΡΠΈΠ°Π½ΡΠ° Casp-2L ΠΈ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ ΡΠΊΠΎΡΠΎΡΠ΅Π½Π½ΠΎΠ³ΠΎ Π²Π°ΡΠ°Π½ΡΠ° Casp-2S Π² ΠΊΠ»Π΅ΡΠΊΠ°Ρ
Π’-ΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠΉ Π»ΠΈΠΌΡΠΎΠΌΡ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° Π»ΠΈΠ½ΠΈΠΈ Jurkat. ΠΡΠΈ ΡΡΠΎΠΌ ΡΡΠΎΠ²Π΅Π½Ρ ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΠΈ ΠΎΠ±ΡΠ΅ΠΉ Casp-2 Π½Π΅ ΠΈΠ·ΠΌΠ΅Π½ΡΠ»ΡΡ. ΠΠ°ΡΡΡΡΠ΅Π½ΠΈΠ΅ ΠΏΡΠΎΠΏΠΎΡΡΠΈΠΈ ΡΠΏΠ»Π°ΠΉΡ-Π²Π°ΡΠΈΠ°Π½ΡΠΎΠ² Casp-2 ΠΏΡΠΈΠ²ΠΎΠ΄ΠΈΠ» ΠΊ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠ΅ΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠ²Π½ΠΎΠΉ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΊΠ°ΡΠΏΠ°Π·Ρ-2
Residual protective effect of o-oxyazomethine derivatives against iron corrosion in 1 M H2SO4 solution
Induction of apoptotic endonuclease endog with DNA-damaging agents initiates alternative splicing of telomerase catalytic subunit hTERT and inhibition of telomerase activity hTERT in human CD4+ and CD8+ T-lymphocytes
Activity of telomerase catalytic subunit hTERT (human Telomerase Reverse Transcriptase) can be regulated by alternative splicing of its mRNA. At present time exact mechanism of hTERT splicing is not fully understood. Apoptotic endonuclease EndoG is known to participate this process. EndoG expression is induced by DNA damages. The aim of this work was to investigate the ability of DNA-damaging agents with different mechanism of action to induce EndoG expression and inhibit telomerase activity due to the activation of hTERT alternative splicing in normal activated human CD4+ and CD8+ T-lymphocytes. All investigated DNA-damaging agents were able to induce EndoG expression. Cisplatin, a therapeutic compound, producing DNA cross-links induced the highest level of DNA damages and EndoG expression. Incubation of CD4+ and CD8+ T-cells with cisplatin caused the changes in proportion of hTERT splice variants and inhibition of telomerase activity
Induction of apoptotic endonuclease endog with DNA-damaging agents initiates alternative splicing of telomerase catalytic subunit hTERT and inhibition of telomerase activity hTERT in human CD4+ and CD8+ T-lymphocytes
Activity of telomerase catalytic subunit hTERT (human Telomerase Reverse Transcriptase) can be regulated by alternative splicing of its mRNA. At present time exact mechanism of hTERT splicing is not fully understood. Apoptotic endonuclease EndoG is known to participate this process. EndoG expression is induced by DNA damages. The aim of this work was to investigate the ability of DNA-damaging agents with different mechanism of action to induce EndoG expression and inhibit telomerase activity due to the activation of hTERT alternative splicing in normal activated human CD4+ and CD8+ T-lymphocytes. All investigated DNA-damaging agents were able to induce EndoG expression. Cisplatin, a therapeutic compound, producing DNA cross-links induced the highest level of DNA damages and EndoG expression. Incubation of CD4+ and CD8+ T-cells with cisplatin caused the changes in proportion of hTERT splice variants and inhibition of telomerase activity
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