Hydrocyanines: A New Class of Fluorescent Probes for...
Transcript of Hydrocyanines: A New Class of Fluorescent Probes for...
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Hydrocyanines: A New Class of Fluorescent Probes for Reactive Oxygen Species
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Hydrocyanines: How Do They Work ?
2
Fluorescent and
membrane
impermeable
O2.-
Non-fluorescent
and Membrane
permeable
Hydrocyanine Cyanine
N N
RR n
H
N N
RRn
orHO.
Kundu, K. et al Angew. Chem. Int. Ed. 2009, 2, 299-303.
Lin, P. W. et al, Free Radical Biology & Medicine 2009, 47, 1205-1211.
References:
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Hydrocyanines: Highlights
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Hydrocyanines: A New Toolbox
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In Vitro
Flow
Cytometer
In Vivo
Fluorescence
Microscope
Ex Vivo
Tissue Explants
Spectrofluorometer
Plate Reader
In Vivo Imaging
System
Cell Culture
Blood
Any Biological
Sample
Any Fluorescence
Technique
Hydrocyanines
N N
RR n
H
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Hydrocyanines: Comparative Advantages
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ESR: Electron Spin Resonance
DCFDA: Dichlorofluorescin diacetate
DHR: Dihydrorhodamine
DHE: Dihydroethidium
Probe Sensitivity AccuracyPhoto-
stability
Cost/Ease
of UseTunability Stability
ESR probes ++ ++ N/A −− − +
DCFDA/DHR/
DHE+ − −− +++ − −−
Chemilumines-
cence probes+ −− + +++ − −
Hydrocyanines +++ +++ +++ +++ +++ +
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Product Profile: Intracellular Probes
N N
R R
H
N N
R R
D
N N
R R
H
N N
R R
D
N N
R R
H
N N
R R
D
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Hydro-Cy3, mw 414.63, lEx = 535 nm; lEm = 560 nm
Deutero-Cy3, mw 415.63, lEx = 535 nm; lEm = 560 nm
Hydro-Cy5, mw 384.56, lEx = 635 nm; lEm = 660 nm
Deutero-Cy5, mw 385.56, lEx = 635 nm; lEm = 660 nm
Hydro-Cy7, mw 410.59, lEx = 735 nm; lEm = 760 nm
Deutero-Cy7, mw 410.59, lEx = 735 nm; lEm = 760 nm
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Product Profile: Extracellular Probes
N N
CH2(CH2)3SO3Na CH2(CH2)3SO3Na
H
N N
CH2(CH2)3SO3Na CH2(CH2)3SO3Na
D
N N
NaO3S(CH2)3CH2CH2(CH2)3SO3Na
H
N N
NaO3S(CH2)3CH2CH2(CH2)3SO3Na
D
Cl
Cl
H-ICG, mw 798.96, lEx = 535 nm; lEm = 560 nm
D-ICG, mw 799.96, lEx = 535 nm; lEm = 560 nm
H-IR-783, mw 873.47, lEx = 535 nm; lEm = 560 nm
D-IR-783, mw 874.47, lEx = 535 nm; lEm = 560 nm
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Hydrocyanines Have Nano-molar Sensitivity (a) & Excellent Stability (b)
b
0
10
20
30
40
50
60
70
0 10 20 30.
[H2O2] in Fenton’s Reagent (nM)
Inte
ns
ity (
RF
U/s
)
Hydro-Cy7 / r2=0.996
Hydro-Cy3
/ r2=0.988
DHE / R2=0.359
0
20
40
60
80
100
0 5 10 15 20 25
Time (h)
[%]
Inta
ct
Hydro-Cy3
Hydro-Cy7
DHE
a
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Hydrocyanines Have Excellent Specificity for Radical Oxidants
0
200
400
600
800
1000
Contr
ol
O2-
¹O2
H2O
2HO·
Fe²+
TBHP
TBO·
NO· (
NOC-5
)
ONOO- (
SIN-1
)
ClO
-
GSH
Inte
nsit
y (
RF
U/s
)
Specificity (Hydro-Cy7)
0
200
400
600
800
Con
trol
O2-
1O2
H2O
2HO.
Fe2+
TBHP
TBO.
NO. (
NOC-5
)
ONOO- (S
IN-1
)
ClO
-
GSH
Inte
ns
sit
y (
RF
U/s
)
Specificity (Hydro-Cy3)
Hydrocyanines
&
Deuterocyaninesare Specific for
Radical Oxidants
i.e. Hydroxyl Radical
or Superoxide
Anion Radical
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Hydrocyanines Have Fast Response to ROS (a) & are Non-Toxic (b)
Time-Course Study with Hydro-Cy3
0
200
400
600
800
1000
1200
0 100 200 300 400
Time (s)
Inte
ns
ity
(R
FU
/s)
Untr
eate
d
60 m
ins
2 O2
1mM
H
M H
-Cy3
10
min
s
10
0M
H-C
y3 6
0 m
ins
10
0 1mM
H-C
y3 1
0 m
ins
1mM
H-C
y3 6
0 m
ins
0
25
50
75
100
125
*
Cell
co
un
t, %
of
co
ntr
ol
a) b)
Fast Response to ROS Hydrocyanines are Non-Toxic
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Hydrocyanines Can Detect ROS in Cell Culture (a-c) & Tissue Explants (d-f)
(a) Hydro-Cy3 + PBS (b) Hydro-Cy3 + Ang II (c) Hydro-Cy3 + Ang II +
TEMPOL
(d) Hydro-Cy3 + PBS (e) Hydro-Cy3 + LPS (f) Hydro-Cy3 + LPS + TEMPOL
(a) Hydro-Cy3 + PBS (b) Hydro-Cy3 + Ang II (c) Hydro-Cy3 + Ang II +
TEMPOL
(d) Hydro-Cy3 + PBS (e) Hydro-Cy3 + LPS (f) Hydro-Cy3 + LPS + TEMPOL
N N
Et Et
H
(Hydro-Cy3)
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Hydrocyanine Can Detect ROS in Histological Sections and Explants
Hydro-Cy3 (red) staining in distal
small intestines isolated from
immature mice prefed bacteria
N N
Et Et
H(Hydro-Cy3)
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ROS Can be Detected by Flow Cytometry Using Hydrocyanines
Cy5 Fluorescence in RASMs
0
10000
20000
30000
40000
50000
60000
70000
Mean Intensity Cy5
Flu
ore
sc
en
t In
ten
sit
y
Control
Control & Cy5
Ang II
Ang II & Tempol
LPS
LPS & Tempol
N N
Me Me
H
(Hydro-Cy5)
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Hydrocyanine Can Detect ROS in Vivo
(b) Quantification of in vivo
fluorescence
II. Saline + Hydro-Cy7
I. LPS + Hydro-Cy7
(a)
*
Flu
orescen
t In
ten
sit
yA
rb
itra
ry
Un
its
40
30
20
10
0
III. Control II. Saline
+
Hydro-Cy7
I. LPS
+
Hydro-Cy7
III. Control
NN
Me Me
H
(Hydro-Cy7)
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Hydrocyanines Can Detect ROS in Explanted Human Artery
Control LPS LPS &
TempolControl PMA PMA &
Tempol
(Hydro-Cy3)N N
Et Et
H
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• New Class of Fluorescence Probes for Radical Oxidants• Nanomolar Sensitivity• Excellent Photostability & Storage Stability• Detection of ROS in Cell Culture & Tissue Explants• Quantitative Detection of ROS by FACS• The Only Fluorescence Probe for Detecting ROS in vivo
Summary
Hydrocyanines