XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
246
T2: P–31
Molecular spectroscopy in vitro studies of nitrosylmethaemoglobin
(Hb
III
NO) – in search of spectral biomarkers and physiological
importance
Jakub Dybas
1,2,3
, P. Berkowicz
2
, Małgorzata Barańska
1,2
,
Katarzyna M. Marzec
2,3
, and Stefan Chlopicki
2,4
1
Faculty of Chemistry, Jagiellonian University, Ingardena 3, Krakow, Poland
2
Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego
14, Krakow, Poland, e-mail: katarzyna.marzec@jcet.eu, stefan.chlopicki@jcet.eu
3
Center for Medical Genomics OMICRON, Jagiellonian University, Collegium Medicum, Kopernika
7c, Krakow, Poland.
4
Chair of Pharmacology, Jagiellonian University Medical College, Grzegorzecka 16, Krakow,
Poland
Nitric oxide (NO), important mediator in cardiovascular homeostasis involved in regulation of
vascular tone, angiogenesis and platelet aggregation, readily interacts with the iron ion of haem
proteins. In contrast to oxygen or carbon monoxide molecules, NO can react with both, ferrous (FeII)
and ferric (FeIII) iron ion, leading to formation of HbII/III–NO adducts. Another pathway of haem–
NO interaction are redox reactions in which methaemoglobin (metHb) and NO3– or
deoxyhaemoglobin (deoxyHb) and NO are formed. All of these interactions are being regarded as
regulatory and may be complementary involved in the regulation of NO bioavailability. One of the
most intriguing hypothesis claims, that haemoglobin may stabilize and even transport NO.[1,2]
Because of high rate constant of HbIINO adduct and taking into consideration lower stability of
HbIIINO it was assumed, that HbIIINO may actually be considered as pool of labile NO source.
To find out the importance and biological significant of HbIIINO we used three complementary
techniques for Hb state analysis such as Resonance Raman Spectroscopy (RRS), Electron
Paramagnetic Spectroscopy (EPR) and UV-Vis Absorption Spectroscopy to detect and determine
conditions in which HbIIINO is formed inside functional red blood cells (RBCs). As a reference
method we used Blood Gas Analysis (BGA). Human blood samples were collected from healthy
volunteers and RBCs were isolated on the same day and measured within 8 hours. NO was
administered with the usage of NO donor, PAPA–NO with 15 min half-time of NO release. In the
biological part of the work we used Human Aortic Endothelial Cells (HAEC) stimulated with calcium
ionophore and incubated with RBCs in physiological conditions. Such obtained samples were
measured with RRS and UV-Vis.
In first part of the work we examined influence of oxygen saturation inside RBCs on formed Hb–
NO adducts after addition of exogenous NO and by application of RRS and UV-Vis methods we
proved formation of HbIIINO in the samples with high oxygen content. Moreover it was also
confirmed directly by analysis of EPR results. In the second step, we took a trial to detect HbIIINO
formed in vitro after incubation of RBCs with HAEC stimulated to produce NO. In obtained results
we saw slight changes in marker band positions, which were not present when inhibitor of NO
production, L-NAME, were used on HAEC before stimulation them with calcium ionophore.
In our work we demonstrated, that a full insight into haem-NO adducts may only be obtained with
application of few complementary techniques and that vibrational spectroscopy could also serve as a
model in later biological studies. The mechanism of NO action in human body still remains
ambiguous and our confirmation of HbIIINO formation in physiological conditions indicate a novel
role of haem-NO interactions in cardiovascular homeostasis.
Keywords: nitric oxide; red blood cells; nitrosylmetheamoglobin; haem-NO adducts
Acknowledgment
This work was supported by the Polish Ministry of Science and Higher Education (grant No IP2015 048474) and
National Center of Science (DEC-2013/08/A/ST4/00308)
References
[1] D.B. Kim-Shapiro, A.N. Schechter, M.T. Gladwin, Arterioscler. Thromb. Vasc. Biol. 26 (2006) 697.
[2] C. Liu, W. Zhao, G.J. Christ, M.T. Gladwin, D.B. Kim-Shapiro, Free Radic. Biol. Med. 65 (2013) 1164.
XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
247
T2: P–32
FTIR and Raman – based biochemical profiling of lungs in early stages
of pulmonary metastases in murine model of breast cancer
Karolina Chrabaszcz
1,2,3
, Jakub Dybas
1,2,3
, Kamila Kochan
4
,
Andrzej Fedorowicz
1
, Agnieszka Jasztal
1
, Elżbieta Buczek
1
, Kamilla Malek
3
,
Stefan Chlopicki
1,5
, and Katarzyna M. Marzec
1,2
1
Jagiellonian Center for Experimental Therapeutics, Jagiellonian University, Krakow, Poland,
e-mail: katarzyna.marzec@jcet.eu
2
Center for Medical Genomics OMICRON, Jagiellonian University, Collegium Medicum Krakow, Poland
3
Faculty of Chemistry, Jagiellonian University Krakow, Poland
4
Centre for Biospectroscopy, School of Chemistry, Monash University, Australia
5
Chair of Pharmacology, Jagiellonian University Medical College, Krakow, Poland
Raman and IR spectroscopies have been already used for the lung tissue content measurement and
analysis1 as well as for the visualization of the changes in the tissue composition which occurs during
lungmetastasis2.In this studies we report on a potential of those techniques for studies of the pulmonary
lipid interstitial fibroblasts (LIFs) content occurring along witha changes of the biochemical profile typical
for the early stage of lung metastasis.
The chosen areas of the cross sections of the lung from control BALB/c mice and BALB/c mice 2
weeks after ortothropic injection of 4T1 breasts cancer cells were studied with the use of Raman imaging
with 532 nm excitation laser wavelength, FTIR spectroscopy and chemometric methods. Measurements
were performed for 5 μm thick, frozen, cross-sections of lungs taken from different heights of murine left
lung (top, middle and bottom part of organ) and put on CaF
2
slides.
Studies carried out with those two techniques allowed for ex vivorecognition of the distribution of
vitamin A as well as semi-quantitative analysis of the content present in LIFs. Moreover, it was possible to
observe changes of biochemical profile under the influence of cancer disease (semi-quantitative information
about a level of nuclei acids, carbohydrates including glycogen, lipids and changes in secondary structures
of tissue proteins).Furthermore, it can be suggested that a decrease in the endogenous retinoids content in
combination with a decrease lipid fraction and increase of glycogen in lungs could be a potential biomarker
of the early phases of pulmonary metastases in murine model of metastatic breast cancer.
Fig. 1. (A) Microphotographs of the cross section of murine lung with labelled investigated areas (170x170 µm). Analysis of
intergral intensity of: CH stretching band in the region 2800-3050 cm-1 showing organic matter (B); a band centered at 751 cm
–1
(Hb inside red blood cells – RBCs); (C) a band centered at 1202 cm
–1
reveal vitamin A (D). The KMC results (1E–2E) with the
average Raman spectrum for section (1A–2A) were presented for main classes including vitamin A (green), tissue (grey) and haem
from RBCs (red). Figure 1F and 2F corresponds with pure class of vitamin A extracted from KCM analysis.
Keywords: lung cancer; metastasis; Raman and IR spectroscopy; lipofibroblasts
Acknowledgment
This work was supported by the Polish Ministry of Science and Higher Education (grant No IP2015 048474) and
METENDOPHA-STRATEGMED1/233226/NCBR/2015.
References
[1] K.M. Marzec, K. Kochan, A. Federowicz, A. Jasztal, K. Chruszcz-Lipska, J.C. Dobrowolski, S. Chlopicki,
M. Baranska, Analyst. 140 (2015) 2171.
[2] T. Bhattacharjee, S. Tawde, R. Hudlikar, M. Mahimkar, G. Maru, A. Ingle, C. Murali Krishna, J. Biomed.
Opt. 20 (2015) 85006.
Dostları ilə paylaş: |