12 research outputs found
Can one extract the electron-phonon-interaction from tunneling data in case of the multigap superconductor MgB?
In the present work we calculate the tunneling density of states (DOS) of
MgB% for different tunneling directions by directly solving the two-band
Eliashberg equations (EE) in the real-axis formulation. This procedure reveals
the fine structures of the DOS due to the optical phonons. Then we show that
the numeric inversion of the standard \emph{single-band} EE (the only available
method), when applied to the \emph{two-band} DOS of MgB, may lead to
wrong estimates of the strength of certain phonon branches (e.g. the )
in the extracted electron-phonon spectral function . The
fine structures produced by the two-band interaction at energies between 20 and
100 meV turn out to be clearly observable only for tunneling along the
planes, when the extracted contains the combination
\textbf{+}, together with a minor \textbf{+} component. Only in this case
it is possible to extract information on the -band contribution to the
spectral functions. For any other tunneling direction, the -band
contribution (which does not determine the superconducting properties of
MgB) is dominant and almost coincides with the whole
for tunneling along the c axis. Our results are compared with recent
experimental tunneling and point-contact data.Comment: 5 pages, 3 figures. Submitted to Phys. Rev. B (Brief Reports
A connection between inclusive semileptonic decays of bound and free heavy quarks
A relativistic constituent quark model, formulated on the light-front, is
used to derive a new parton approximation for the inclusive semileptonic decay
width of the B-meson. A simple connection between the decay rate of a free
heavy-quark and the one of a heavy-quark bound in a meson or in a baryon is
established. The main features of the new approach are the treatment of the
b-quark as an on-mass-shell particle and the inclusion of the effects arising
from the b-quark transverse motion in the B-meson. In a way conceptually
similar to the deep-inelastic scattering case, the B-meson inclusive width is
expressed as the integral of the free b-quark partial width multiplied by a
bound-state factor related to the b-quark distribution function in the B-meson.
The non-perturbative meson structure is described through various quark-model
wave functions, constructed via the Hamiltonian light-front formalism using as
input both relativized and non-relativistic potential models. A link between
spectroscopic quark models and the B-meson decay physics is obtained in this
way. Our predictions for the B -> X_c l nu_l and B -> X_u l nu_l decays are
used to extract the CKM parameters |V_cb| and |V_ub| from available inclusive
data. After averaging over the various quark models adopted and including
leading-order perturbative QCD corrections, we obtain |V_cb| = (43.0 +/-
0.7_exp +/- 1.8_th) 10^-3 and |V_ub| = (3.83 +/- 0.48_exp +/- 0.14_th) 10^-3,
implying |V_ub / V_cb| = 0.089 +/- 0.011_exp +/- 0.005_th, in nice agreement
with existing predictions.Comment: revised version with pQCD corrections included, to appear in Physical
Review
Uncoupling of oxidative phosphorylation and antioxidants affect fusion of primary human myoblasts in vitro
Reactive oxygen species are at the origin of muscular fatigue and atrophy. They are also linked to muscular dystrophies, a group of human genetic diseases. Several studies point to the benefits of application of antioxidants and uncouplers of oxidative phosphorylation to improve the functional activity of normal and pathological muscles. Other studies point to potential dangers of these compounds. Aim. To study the effect of mitochondria-targeted antioxidants and uncouplers of oxidative phosphorylation on muscle differentiation. Methods. Muscle differentiation was induced by serum starvation and monitored by troponin T staining. Results. the mitochondria-targeted uncoupler of oxidative phosphorylation C12TPP, but not the mitochondria-targeted antioxidant SkQ1, inhibit fusion of primary myoblasts upon their differentiation, but do not affect the synthesis of troponin T, a protein marker of muscle differentiation. Conclusion. The effect of C12TPP could be at least partially mediated by inhibition of reactive oxygen species (ROS) production since antioxidant N-acetylcysteine at high doses also inhibited differentiation of myoblasts.ΠΠΊΡΠΈΠ²Π½Ρ ΡΠΎΡΠΌΠΈ ΠΊΠΈΡΠ½Ρ (ΠΠ€Π) ΠΌΠΎΠΆΡΡΡ Π²ΠΈΠΊΠ»ΠΈΠΊΠ°ΡΠΈ ΠΌ'ΡΠ·ΠΎΠ²Ρ Π²ΡΠΎΠΌΡ Ρ Π°ΡΡΠΎΡΡΡ ΠΌ'ΡΠ·ΡΠ². ΠΠ€Π ΡΠ°ΠΊΠΎΠΆ ΠΏΠΎΠ²'ΡΠ·Π°Π½Ρ Π· ΠΌ'ΡΠ·ΠΎΠ²ΠΈΠΌΠΈ Π΄ΠΈΡΡΡΠΎΡΡΡ. ΠΠ΅Π·Π»ΡΡ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ Π²ΠΊΠ°Π·ΡΡ Π½Π° ΠΏΠΎΠ·ΠΈΡΠΈΠ²Π½ΠΈΠΉ Π²ΠΏΠ»ΠΈΠ² Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΡΠ² Ρ ΡΠ°Π·ΠΎΠ±ΡΡΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΡΠ²Π°Π½Π½Ρ Π½Π° ΡΡΠ½ΠΊΡΡΠΎΠ½Π°Π»ΡΠ½Ρ Π°ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΠΌ'ΡΠ·ΡΠ² Π² Π½ΠΎΡΠΌΡ ΡΠ° ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΡΡ. ΠΠ΅ΡΠ°. ΠΠΈΠ²ΡΠΈΡΠΈ Π²ΠΏΠ»ΠΈΠ² ΠΌΡΡΠΎΡ
ΠΎΠ½Π΄ΡΡΠ°Π»ΡΠ½ΠΎΡ-ΡΠΏΡΡΠΌΠΎΠ²Π°Π½ΠΈΡ
Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΡΠ² Ρ ΡΠ°Π·ΠΎΠ±ΡΡΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΡΠ²Π°Π½Π½Ρ Π½Π° Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ ΠΏΠ΅ΡΠ²ΠΈΠ½Π½ΠΈΡ
ΠΌΡΠΎΠ±Π»Π°ΡΡΡΠ² Π»ΡΠ΄ΠΈΠ½ΠΈ. ΠΠ΅ΡΠΎΠ΄ΠΈ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ. ΠΌΡΡΠΎΡ
ΠΎΠ½Π΄ΡΡΠ°Π»ΡΠ½ΠΎΡ-ΡΠΏΡΡΠΌΠΎΠ²Π°Π½ΠΈΠΉ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Ρ ΠΎΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΡΠ²Π°Π½Π½Ρ C12TPP, Π°Π»Π΅ Π½Π΅ ΠΌΡΡΠΎΡ
ΠΎΠ½Π΄ΡΡΠ°Π»ΡΠ½ΠΎΡ-ΡΠΏΡΡΠΌΠΎΠ²Π°Π½ΠΈΠΉ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½Ρ SkQ1, ΠΏΡΠΈΠ³Π½ΡΡΡΡ Π·Π»ΠΈΡΡΡ ΠΌΡΠΎΠ±Π»Π°ΡΡΡΠ² ΠΏΡΠΈ Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ, ΠΏΡΠΈ ΡΡΠΎΠΌΡ Π½Π΅ Π²ΠΏΠ»ΠΈΠ²Π°ΡΡΠΈ Π½Π° Π΅ΠΊΡΠΏΡΠ΅ΡΡΡ ΡΡΠΎΠΏΠΎΠ½ΠΈΠ½Π° Π’, Π±ΡΠ»ΠΊΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ°ΡΠΊΠ΅ΡΠ° ΠΌ'ΡΠ·ΠΎΠ²ΠΎΡ Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ. ΠΠΈΡΠ½ΠΎΠ²ΠΊΠΈ. ΠΠΏΠ»ΠΈΠ² C12TPP ΠΌΠΎΠΆΠ΅ Π±ΡΡΠΈ ΡΠ°ΡΡΠΊΠΎΠ²ΠΎ Π²ΠΈΠΊΠ»ΠΈΠΊΠ°Π½ΠΎ ΠΏΡΠΈΠ³Π½ΡΡΠ΅Π½Π½ΡΠΌ ΠΠ€Π, ΡΠ°ΠΊ ΡΠΊ Π²ΠΈΡΠΎΠΊΡ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΡΡ ΠΊΠ»Π°ΡΠΈΡΠ½ΠΎΠ³ΠΎ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΡ N-Π°ΡΠ΅ΡΠΈΠ»ΡΠΈΡΡΠ΅ΡΠ½Ρ ΡΠ°ΠΊΠΎΠΆ ΡΠ½Π³ΡΠ±ΡΠ²Π°Π»ΠΈ Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ ΠΌΡΠΎΠ±Π»Π°ΡΡΡΠ² Π»ΡΠ΄ΠΈΠ½ΠΈ.ΠΠΊΡΠΈΠ²Π½ΡΠ΅ ΡΠΎΡΠΌΡ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π° (ΠΠ€Π) ΠΌΠΎΠ³ΡΡ Π²ΡΠ·ΡΠ²Π°ΡΡ ΠΌΡΡΠ΅ΡΠ½ΡΡ ΡΡΡΠ°Π»ΠΎΡΡΡ ΠΈ Π°ΡΡΠΎΡΠΈΡ ΠΌΡΡΡ. ΠΠ€Π ΡΠ°ΠΊΠΆΠ΅ ΡΠ²ΡΠ·Π°Π½Ρ Ρ ΠΌΡΡΠ΅ΡΠ½ΡΠΌΠΈ Π΄ΠΈΡΡΡΠΎΡΠΈΡΠΌΠΈ. ΠΠ½ΠΎΠΆΠ΅ΡΡΠ²ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° ΠΏΠΎΠ»ΠΎΠΆΠΈΡΠ΅Π»ΡΠ½ΠΎΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠΎΠ² ΠΈ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π° ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΌΡΡΡ Π² Π½ΠΎΡΠΌΠ΅ ΠΈ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ. Π¦Π΅Π»Ρ. ΠΠ·ΡΡΠΈΡΡ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΌΠΈΡΠΎΡ
ΠΎΠ½Π΄ΡΠΈΠ°Π»ΡΠ½ΠΎ-Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΡ
Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠΎΠ² ΠΈ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π° Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΡ ΠΏΠ΅ΡΠ²ΠΈΡΠ½ΡΡ
ΠΌΠΈΠΎΠ±Π»Π°ΡΡΠΎΠ² ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°. ΠΠ΅ΡΠΎΠ΄Ρ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΌΠΈΡΠΎΡ
ΠΎΠ½Π΄ΡΠΈΠ°Π»ΡΠ½ΠΎ-Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΠΉ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Ρ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ C12TPP, Π½ΠΎ Π½Π΅ ΠΌΠΈΡΠΎΡ
ΠΎΠ½Π΄ΡΠΈΠ°Π»ΡΠ½ΠΎ-Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΠΉ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½Ρ SkQ1, ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΠ΅Ρ ΡΠ»ΠΈΡΠ½ΠΈΠ΅ ΠΌΠΈΠΎΠ±Π»Π°ΡΡΠΎΠ² ΠΏΡΠΈ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΠ΅, ΠΏΡΠΈ ΡΡΠΎΠΌ Π½Π΅ Π²Π»ΠΈΡΡ Π½Π° ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΡ ΡΡΠΎΠΏΠΎΠ½ΠΈΠ½Π° Π’, Π±Π΅Π»ΠΊΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ°ΡΠΊΠ΅ΡΠ° ΠΌΡΡΠ΅ΡΠ½ΠΎΠΉ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΠΈ. ΠΡΠ²ΠΎΠ΄Ρ. ΠΠ»ΠΈΡΠ½ΠΈΠ΅ C12TPP ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ ΡΠ°ΡΡΠΈΡΠ½ΠΎ Π²ΡΠ·Π²Π°Π½ΠΎ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΠ€Π, ΡΠ°ΠΊ ΠΊΠ°ΠΊ Π²ΡΡΠΎΠΊΠΈΠ΅ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ ΠΊΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ° N-Π°ΡΠ΅ΡΠΈΠ»ΡΠΈΡΡΠ΅ΠΈΠ½Π° ΡΠ°ΠΊΠΆΠ΅ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π»ΠΈ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΡ ΠΌΠΈΠΎΠ±Π»Π°ΡΡΠΎΠ² ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°
Uncoupling of oxidative phosphorylation and antioxidants affect fusion of primary human myoblasts in vitro
Reactive oxygen species are at the origin of muscular fatigue and atrophy. They are also linked to muscular dystrophies, a group of human genetic diseases. Several studies point to the benefits of application of antioxidants and uncouplers of oxidative phosphorylation to improve the functional activity of normal and pathological muscles. Other studies point to potential dangers of these compounds. Aim. To study the effect of mitochondria-targeted antioxidants and uncouplers of oxidative phosphorylation on muscle differentiation. Methods. Muscle differentiation was induced by serum starvation and monitored by troponin T staining. Results. the mitochondria-targeted uncoupler of oxidative phosphorylation C12TPP, but not the mitochondria-targeted antioxidant SkQ1, inhibit fusion of primary myoblasts upon their differentiation, but do not affect the synthesis of troponin T, a protein marker of muscle differentiation. Conclusion. The effect of C12TPP could be at least partially mediated by inhibition of reactive oxygen species (ROS) production since antioxidant N-acetylcysteine at high doses also inhibited differentiation of myoblasts.ΠΠΊΡΠΈΠ²Π½Ρ ΡΠΎΡΠΌΠΈ ΠΊΠΈΡΠ½Ρ (ΠΠ€Π) ΠΌΠΎΠΆΡΡΡ Π²ΠΈΠΊΠ»ΠΈΠΊΠ°ΡΠΈ ΠΌ'ΡΠ·ΠΎΠ²Ρ Π²ΡΠΎΠΌΡ Ρ Π°ΡΡΠΎΡΡΡ ΠΌ'ΡΠ·ΡΠ². ΠΠ€Π ΡΠ°ΠΊΠΎΠΆ ΠΏΠΎΠ²'ΡΠ·Π°Π½Ρ Π· ΠΌ'ΡΠ·ΠΎΠ²ΠΈΠΌΠΈ Π΄ΠΈΡΡΡΠΎΡΡΡ. ΠΠ΅Π·Π»ΡΡ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ Π²ΠΊΠ°Π·ΡΡ Π½Π° ΠΏΠΎΠ·ΠΈΡΠΈΠ²Π½ΠΈΠΉ Π²ΠΏΠ»ΠΈΠ² Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΡΠ² Ρ ΡΠ°Π·ΠΎΠ±ΡΡΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΡΠ²Π°Π½Π½Ρ Π½Π° ΡΡΠ½ΠΊΡΡΠΎΠ½Π°Π»ΡΠ½Ρ Π°ΠΊΡΠΈΠ²Π½ΡΡΡΡ ΠΌ'ΡΠ·ΡΠ² Π² Π½ΠΎΡΠΌΡ ΡΠ° ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΡΡ. ΠΠ΅ΡΠ°. ΠΠΈΠ²ΡΠΈΡΠΈ Π²ΠΏΠ»ΠΈΠ² ΠΌΡΡΠΎΡ
ΠΎΠ½Π΄ΡΡΠ°Π»ΡΠ½ΠΎΡ-ΡΠΏΡΡΠΌΠΎΠ²Π°Π½ΠΈΡ
Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΡΠ² Ρ ΡΠ°Π·ΠΎΠ±ΡΡΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΡΠ²Π°Π½Π½Ρ Π½Π° Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ ΠΏΠ΅ΡΠ²ΠΈΠ½Π½ΠΈΡ
ΠΌΡΠΎΠ±Π»Π°ΡΡΡΠ² Π»ΡΠ΄ΠΈΠ½ΠΈ. ΠΠ΅ΡΠΎΠ΄ΠΈ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ. ΠΌΡΡΠΎΡ
ΠΎΠ½Π΄ΡΡΠ°Π»ΡΠ½ΠΎΡ-ΡΠΏΡΡΠΌΠΎΠ²Π°Π½ΠΈΠΉ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Ρ ΠΎΠΊΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΡΠ²Π°Π½Π½Ρ C12TPP, Π°Π»Π΅ Π½Π΅ ΠΌΡΡΠΎΡ
ΠΎΠ½Π΄ΡΡΠ°Π»ΡΠ½ΠΎΡ-ΡΠΏΡΡΠΌΠΎΠ²Π°Π½ΠΈΠΉ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½Ρ SkQ1, ΠΏΡΠΈΠ³Π½ΡΡΡΡ Π·Π»ΠΈΡΡΡ ΠΌΡΠΎΠ±Π»Π°ΡΡΡΠ² ΠΏΡΠΈ Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ, ΠΏΡΠΈ ΡΡΠΎΠΌΡ Π½Π΅ Π²ΠΏΠ»ΠΈΠ²Π°ΡΡΠΈ Π½Π° Π΅ΠΊΡΠΏΡΠ΅ΡΡΡ ΡΡΠΎΠΏΠΎΠ½ΠΈΠ½Π° Π’, Π±ΡΠ»ΠΊΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ°ΡΠΊΠ΅ΡΠ° ΠΌ'ΡΠ·ΠΎΠ²ΠΎΡ Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ. ΠΠΈΡΠ½ΠΎΠ²ΠΊΠΈ. ΠΠΏΠ»ΠΈΠ² C12TPP ΠΌΠΎΠΆΠ΅ Π±ΡΡΠΈ ΡΠ°ΡΡΠΊΠΎΠ²ΠΎ Π²ΠΈΠΊΠ»ΠΈΠΊΠ°Π½ΠΎ ΠΏΡΠΈΠ³Π½ΡΡΠ΅Π½Π½ΡΠΌ ΠΠ€Π, ΡΠ°ΠΊ ΡΠΊ Π²ΠΈΡΠΎΠΊΡ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΡΡ ΠΊΠ»Π°ΡΠΈΡΠ½ΠΎΠ³ΠΎ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΡ N-Π°ΡΠ΅ΡΠΈΠ»ΡΠΈΡΡΠ΅ΡΠ½Ρ ΡΠ°ΠΊΠΎΠΆ ΡΠ½Π³ΡΠ±ΡΠ²Π°Π»ΠΈ Π΄ΠΈΡΠ΅ΡΠ΅Π½ΡΡΡΠ²Π°Π½Π½Ρ ΠΌΡΠΎΠ±Π»Π°ΡΡΡΠ² Π»ΡΠ΄ΠΈΠ½ΠΈ.ΠΠΊΡΠΈΠ²Π½ΡΠ΅ ΡΠΎΡΠΌΡ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π° (ΠΠ€Π) ΠΌΠΎΠ³ΡΡ Π²ΡΠ·ΡΠ²Π°ΡΡ ΠΌΡΡΠ΅ΡΠ½ΡΡ ΡΡΡΠ°Π»ΠΎΡΡΡ ΠΈ Π°ΡΡΠΎΡΠΈΡ ΠΌΡΡΡ. ΠΠ€Π ΡΠ°ΠΊΠΆΠ΅ ΡΠ²ΡΠ·Π°Π½Ρ Ρ ΠΌΡΡΠ΅ΡΠ½ΡΠΌΠΈ Π΄ΠΈΡΡΡΠΎΡΠΈΡΠΌΠΈ. ΠΠ½ΠΎΠΆΠ΅ΡΡΠ²ΠΎ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° ΠΏΠΎΠ»ΠΎΠΆΠΈΡΠ΅Π»ΡΠ½ΠΎΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠΎΠ² ΠΈ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π° ΡΡΠ½ΠΊΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΡ Π°ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΌΡΡΡ Π² Π½ΠΎΡΠΌΠ΅ ΠΈ ΠΏΠ°ΡΠΎΠ»ΠΎΠ³ΠΈΠΈ. Π¦Π΅Π»Ρ. ΠΠ·ΡΡΠΈΡΡ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΠΌΠΈΡΠΎΡ
ΠΎΠ½Π΄ΡΠΈΠ°Π»ΡΠ½ΠΎ-Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΡ
Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠΎΠ² ΠΈ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Π΅ΠΉ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π° Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΡ ΠΏΠ΅ΡΠ²ΠΈΡΠ½ΡΡ
ΠΌΠΈΠΎΠ±Π»Π°ΡΡΠΎΠ² ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°. ΠΠ΅ΡΠΎΠ΄Ρ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΌΠΈΡΠΎΡ
ΠΎΠ½Π΄ΡΠΈΠ°Π»ΡΠ½ΠΎ-Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΠΉ ΡΠ°Π·ΠΎΠ±ΡΠΈΡΠ΅Π»Ρ ΠΎΠΊΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ C12TPP, Π½ΠΎ Π½Π΅ ΠΌΠΈΡΠΎΡ
ΠΎΠ½Π΄ΡΠΈΠ°Π»ΡΠ½ΠΎ-Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΠΉ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½Ρ SkQ1, ΠΈΠ½Π³ΠΈΠ±ΠΈΡΡΠ΅Ρ ΡΠ»ΠΈΡΠ½ΠΈΠ΅ ΠΌΠΈΠΎΠ±Π»Π°ΡΡΠΎΠ² ΠΏΡΠΈ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΠ΅, ΠΏΡΠΈ ΡΡΠΎΠΌ Π½Π΅ Π²Π»ΠΈΡΡ Π½Π° ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΡ ΡΡΠΎΠΏΠΎΠ½ΠΈΠ½Π° Π’, Π±Π΅Π»ΠΊΠΎΠ²ΠΎΠ³ΠΎ ΠΌΠ°ΡΠΊΠ΅ΡΠ° ΠΌΡΡΠ΅ΡΠ½ΠΎΠΉ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΠΈ. ΠΡΠ²ΠΎΠ΄Ρ. ΠΠ»ΠΈΡΠ½ΠΈΠ΅ C12TPP ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ ΡΠ°ΡΡΠΈΡΠ½ΠΎ Π²ΡΠ·Π²Π°Π½ΠΎ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΠ€Π, ΡΠ°ΠΊ ΠΊΠ°ΠΊ Π²ΡΡΠΎΠΊΠΈΠ΅ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ ΠΊΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ Π°Π½ΡΠΈΠΎΠΊΡΠΈΠ΄Π°Π½ΡΠ° N-Π°ΡΠ΅ΡΠΈΠ»ΡΠΈΡΡΠ΅ΠΈΠ½Π° ΡΠ°ΠΊΠΆΠ΅ ΠΈΠ½Π³ΠΈΠ±ΠΈΡΠΎΠ²Π°Π»ΠΈ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΡΠΎΠ²ΠΊΡ ΠΌΠΈΠΎΠ±Π»Π°ΡΡΠΎΠ² ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°
Age-associated murine cardiac lesions are attenuated by the mitochondria-targeted antioxidant SkQ1
Age-related changes in mammalian hearts
often result in cardiac hypertrophy and fibrosis that are
preceded by inflammatory infiltration. In this paper, we
show that lifelong treatment of BALB/c and C57BL/6
mice with the mitochondria-targeted antioxidant SkQ1
retards senescence-associated myocardial disease
(cardiomyopathy), cardiac hypertrophy, and diffuse
myocardial fibrosis. To investigate the molecular basis
of the action of SkQ1, we have applied DNA microarray
analysis. The global gene expression profile in heart
tissues was not significantly affected by administration
of SkQ1. However, we found some small but statistically
significant modifications of the pathways related to cellto-cell contact, adhesion, and leukocyte infiltration.
Probably, SkQ1-induced decrease in leukocyte and
mesenchymal cell adhesion and/or infiltration lead to a
reduction in age-related inflammation and subsequent
fibrosis. The data indicate a causative role of
mitochondrial reactive oxygen species in cardiovascular
aging and imply that SkQ1 has poteential as a drug
against age-related cardiac dysfunction