TY  - CONF
AU  - Nikolić, Ljiljana
AU  - Bataveljić, Danijela
AU  - Bijelić, Dunja
AU  - Milićević, Katarina
AU  - Bogdanović Pristov, Jelena
PY  - 2023
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5835
AB  - The neurotransmitter norepinephrine (NE) plays a central role in regulating arousal,
attention, cognitive function and stress responses. Unlike fast neurotransmitters which
act at synapses, NE is released in the neuropil and performs multiple targeting in the
surrounding area. The glial cells astrocytes are a direct target of NE, as they express
all adrenergic receptor subtypes and respond with Ca2+ increases to NE. Astroglial
responses elicited by strong and transient increases of NE in the brain are well studied,
but the effect of a low background NE concentration on astrocytes is unknown. This
background level of NE is maintained by basal noradrenergic activity and is
constantly present in the brain. Therefore, the response of astrocytes to the
background NE could have been unintentionally evoked in previous studies but its
effect overlooked.

To assess action of background NE on astrocytes we combined the whole-cell patch-
clamp, immunohistochemistry, Ca2+ imaging and pharmacology. We used cultured

cortical astrocytes to bypass NE targeting of multiple cell types.
We show that cortical astrocytes detect and respond to the background NE
concentration with an increase in intracellular Ca2+. This Ca2+ liberated from
intracellular stores further increased large-conductance, Ca2+-sensitive potassium
(BK) currents in astrocytes. Notably, immunohistochemistry data showed that BK
channels and alpha 1 adrenoreceptor are highly expressed in astrocytes in the rat
cortex. Furthermore, stimulation of astrocytes by background NE was inhibited by
alpha-adrenoceptor antagonist.
Our results suggest that astrocytes maintain basal brain activity by perceiving and
responding to the background NE.
PB  - Belgrade: Serbian Neuroscience Society
C3  - Book of abstracts: 8th Congress of Serbian Neuroscience Society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia
T1  - Background norepinephrine impacts activity of cortical astrocytes
SP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5835
ER  - 

@conference{
author = "Nikolić, Ljiljana and Bataveljić, Danijela and Bijelić, Dunja and Milićević, Katarina and Bogdanović Pristov, Jelena",
year = "2023",
abstract = "The neurotransmitter norepinephrine (NE) plays a central role in regulating arousal,
attention, cognitive function and stress responses. Unlike fast neurotransmitters which
act at synapses, NE is released in the neuropil and performs multiple targeting in the
surrounding area. The glial cells astrocytes are a direct target of NE, as they express
all adrenergic receptor subtypes and respond with Ca2+ increases to NE. Astroglial
responses elicited by strong and transient increases of NE in the brain are well studied,
but the effect of a low background NE concentration on astrocytes is unknown. This
background level of NE is maintained by basal noradrenergic activity and is
constantly present in the brain. Therefore, the response of astrocytes to the
background NE could have been unintentionally evoked in previous studies but its
effect overlooked.

To assess action of background NE on astrocytes we combined the whole-cell patch-
clamp, immunohistochemistry, Ca2+ imaging and pharmacology. We used cultured

cortical astrocytes to bypass NE targeting of multiple cell types.
We show that cortical astrocytes detect and respond to the background NE
concentration with an increase in intracellular Ca2+. This Ca2+ liberated from
intracellular stores further increased large-conductance, Ca2+-sensitive potassium
(BK) currents in astrocytes. Notably, immunohistochemistry data showed that BK
channels and alpha 1 adrenoreceptor are highly expressed in astrocytes in the rat
cortex. Furthermore, stimulation of astrocytes by background NE was inhibited by
alpha-adrenoceptor antagonist.
Our results suggest that astrocytes maintain basal brain activity by perceiving and
responding to the background NE.",
publisher = "Belgrade: Serbian Neuroscience Society",
journal = "Book of abstracts: 8th Congress of Serbian Neuroscience Society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia",
title = "Background norepinephrine impacts activity of cortical astrocytes",
pages = "51",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5835"
}

Nikolić, L., Bataveljić, D., Bijelić, D., Milićević, K.,& Bogdanović Pristov, J.. (2023). Background norepinephrine impacts activity of cortical astrocytes. in Book of abstracts: 8th Congress of Serbian Neuroscience Society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia
Belgrade: Serbian Neuroscience Society., 51.
https://hdl.handle.net/21.15107/rcub_ibiss_5835

Nikolić L, Bataveljić D, Bijelić D, Milićević K, Bogdanović Pristov J. Background norepinephrine impacts activity of cortical astrocytes. in Book of abstracts: 8th Congress of Serbian Neuroscience Society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia. 2023;:51.
https://hdl.handle.net/21.15107/rcub_ibiss_5835 .

Nikolić, Ljiljana, Bataveljić, Danijela, Bijelić, Dunja, Milićević, Katarina, Bogdanović Pristov, Jelena, "Background norepinephrine impacts activity of cortical astrocytes" in Book of abstracts: 8th Congress of Serbian Neuroscience Society with international participation; 2023 May 31 - Jun 2; Belgrade, Serbia (2023):51,
https://hdl.handle.net/21.15107/rcub_ibiss_5835 .

TY  - JOUR
AU  - Perić, Mina
AU  - Bataveljić, Danijela
AU  - Bijelić, Dunja
AU  - Milićević, Katarina
AU  - Andjus, Pavle R.
AU  - Bogdanović Pristov, Jelena
AU  - Nikolić, Ljiljana
PY  - 2022
UR  - https://onlinelibrary.wiley.com/doi/10.1002/jemt.24066
UR  - http://www.ncbi.nlm.nih.gov/pubmed/35088507
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/4790
AB  - We describe an approach for studying the physiology of single live cells using the conceptionally novel upright microscope/patch-clamp configuration. Electrophysiology experiments typically require a microscope with the fixed stage position and the motion control of the microscope objective. Here, we demonstrate that a microscope with a z-axis movable stage and a fixed objective can also be efficiently used in combination with the patch-clamp technique. We define a set of underlying principles governing the operation of this microscope/patch-clamp configuration and demonstrate its performance in practice using cultured astrocytes, microglia, and oligodendrocytes. Experimental results show that our custom configuration provides stable recordings, has a high success rate of the whole-cell patch-clamp trials, can be effectively applied to study cellular physiology of glial cells, and provides comparable performance and usability to the commercially available systems. Our system can be easily replicated or adapted to suit the needs of the research groups and can be cost-effective in reducing the investments in purchasing additional equipment. We provide step-by-step instructions on implementing an upright microscope with z-axis movable stage as a routine workhorse for patch-clamping.
PB  - Hoboken: John Wiley and Sons Inc.
T2  - Microscopy Research and Technique
T1  - Approach for patch-clamping using an upright microscope with z-axis movable stage.
IS  - 6
VL  - 85
DO  - 10.1002/jemt.24066
SP  - 2095
EP  - 2104
ER  - 

@article{
author = "Perić, Mina and Bataveljić, Danijela and Bijelić, Dunja and Milićević, Katarina and Andjus, Pavle R. and Bogdanović Pristov, Jelena and Nikolić, Ljiljana",
year = "2022",
abstract = "We describe an approach for studying the physiology of single live cells using the conceptionally novel upright microscope/patch-clamp configuration. Electrophysiology experiments typically require a microscope with the fixed stage position and the motion control of the microscope objective. Here, we demonstrate that a microscope with a z-axis movable stage and a fixed objective can also be efficiently used in combination with the patch-clamp technique. We define a set of underlying principles governing the operation of this microscope/patch-clamp configuration and demonstrate its performance in practice using cultured astrocytes, microglia, and oligodendrocytes. Experimental results show that our custom configuration provides stable recordings, has a high success rate of the whole-cell patch-clamp trials, can be effectively applied to study cellular physiology of glial cells, and provides comparable performance and usability to the commercially available systems. Our system can be easily replicated or adapted to suit the needs of the research groups and can be cost-effective in reducing the investments in purchasing additional equipment. We provide step-by-step instructions on implementing an upright microscope with z-axis movable stage as a routine workhorse for patch-clamping.",
publisher = "Hoboken: John Wiley and Sons Inc.",
journal = "Microscopy Research and Technique",
title = "Approach for patch-clamping using an upright microscope with z-axis movable stage.",
number = "6",
volume = "85",
doi = "10.1002/jemt.24066",
pages = "2095-2104"
}

Perić, M., Bataveljić, D., Bijelić, D., Milićević, K., Andjus, P. R., Bogdanović Pristov, J.,& Nikolić, L.. (2022). Approach for patch-clamping using an upright microscope with z-axis movable stage.. in Microscopy Research and Technique
Hoboken: John Wiley and Sons Inc.., 85(6), 2095-2104.
https://doi.org/10.1002/jemt.24066

Perić M, Bataveljić D, Bijelić D, Milićević K, Andjus PR, Bogdanović Pristov J, Nikolić L. Approach for patch-clamping using an upright microscope with z-axis movable stage.. in Microscopy Research and Technique. 2022;85(6):2095-2104.
doi:10.1002/jemt.24066 .

Perić, Mina, Bataveljić, Danijela, Bijelić, Dunja, Milićević, Katarina, Andjus, Pavle R., Bogdanović Pristov, Jelena, Nikolić, Ljiljana, "Approach for patch-clamping using an upright microscope with z-axis movable stage." in Microscopy Research and Technique, 85, no. 6 (2022):2095-2104,
https://doi.org/10.1002/jemt.24066 . .

TY  - CONF
AU  - Milićević, Katarina
AU  - Bijelić, Dunja
AU  - Lazarević, Milica
AU  - Miljković, Đorđe
AU  - Bogdanović Pristov, Jelena
AU  - Petković, Branka
AU  - Anđus, Pavle
AU  - Momčilović, Miljana
AU  - Nikolić, Ljiljana
PY  - 2020
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5514
AB  - Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous
system (CNS), characterized by focal neurodegenerative and demyelinating lesions.
A major contributor to the pathogenic process of MS is the complex interaction
between astrocytes and the CNS-infiltrating immune cells (CNS-IIC). The aim of our
study is to explore how naïve astrocytes respond to the autoreactive immune cells
that invade the CNS. For this reason, CNS-IICs were isolated and purified from
spinal cords of rats with experimental autoimmune encephalomyelitis. Ca2+
dynamics was monitored in Fluo-4 labeled naïve astrocytes, isolated from spinal
cords of wild type rat pups, following brief bath application of CNS-IIC or peripheral
immune cells, with different pharmacological agents. CNS-IICs, and not peripheral
immune cells, induced robust elevation of intracellular Ca2+ in naïve astrocytes. We
demonstrated that this CNS IIC-induced increase in astrocyte Ca2+ does not depend
on the metabotropic glutamate receptors, metabotropic purinergic P2Y1 receptors
or TRPA1 channels. Remarkably, further research showed that Ca2+ elevation in
astrocytes upon exposure to CNS IICs is due to the activation of ionotropic purinergic
P2X7 receptors. Bioluminescence assay showed that immune cell-derived ATP is
not a cause of astrocytic P2X7 receptor activation. In fact, we showed that CNS-IICs
promoted P2X7 receptor activation and increase in cytosolic Ca2+ in astrocytes by
astrocytic hemichannel-dependent ATP release mechanism. Our data suggest that
direct contact between astrocytes and CNS IICs induce ATP-dependent Ca2+
changes in astrocytes and points to the new aspect of cell-cell interactions in
propagation of neuroinflammatory response in CNS autoimmunity.
PB  - Querétaro, México: Instituto de neurobiologia
C3  - Proceedings: 3rd Symposium on Physiology and pathology of neuroglia; 2020 Noc 24-25; Virtual
T1  - Central nervous system-infiltrated immune cells alter calcium dynamics in astrocytes
SP  - 45
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5514
ER  - 

@conference{
author = "Milićević, Katarina and Bijelić, Dunja and Lazarević, Milica and Miljković, Đorđe and Bogdanović Pristov, Jelena and Petković, Branka and Anđus, Pavle and Momčilović, Miljana and Nikolić, Ljiljana",
year = "2020",
abstract = "Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous
system (CNS), characterized by focal neurodegenerative and demyelinating lesions.
A major contributor to the pathogenic process of MS is the complex interaction
between astrocytes and the CNS-infiltrating immune cells (CNS-IIC). The aim of our
study is to explore how naïve astrocytes respond to the autoreactive immune cells
that invade the CNS. For this reason, CNS-IICs were isolated and purified from
spinal cords of rats with experimental autoimmune encephalomyelitis. Ca2+
dynamics was monitored in Fluo-4 labeled naïve astrocytes, isolated from spinal
cords of wild type rat pups, following brief bath application of CNS-IIC or peripheral
immune cells, with different pharmacological agents. CNS-IICs, and not peripheral
immune cells, induced robust elevation of intracellular Ca2+ in naïve astrocytes. We
demonstrated that this CNS IIC-induced increase in astrocyte Ca2+ does not depend
on the metabotropic glutamate receptors, metabotropic purinergic P2Y1 receptors
or TRPA1 channels. Remarkably, further research showed that Ca2+ elevation in
astrocytes upon exposure to CNS IICs is due to the activation of ionotropic purinergic
P2X7 receptors. Bioluminescence assay showed that immune cell-derived ATP is
not a cause of astrocytic P2X7 receptor activation. In fact, we showed that CNS-IICs
promoted P2X7 receptor activation and increase in cytosolic Ca2+ in astrocytes by
astrocytic hemichannel-dependent ATP release mechanism. Our data suggest that
direct contact between astrocytes and CNS IICs induce ATP-dependent Ca2+
changes in astrocytes and points to the new aspect of cell-cell interactions in
propagation of neuroinflammatory response in CNS autoimmunity.",
publisher = "Querétaro, México: Instituto de neurobiologia",
journal = "Proceedings: 3rd Symposium on Physiology and pathology of neuroglia; 2020 Noc 24-25; Virtual",
title = "Central nervous system-infiltrated immune cells alter calcium dynamics in astrocytes",
pages = "45",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5514"
}

Milićević, K., Bijelić, D., Lazarević, M., Miljković, Đ., Bogdanović Pristov, J., Petković, B., Anđus, P., Momčilović, M.,& Nikolić, L.. (2020). Central nervous system-infiltrated immune cells alter calcium dynamics in astrocytes. in Proceedings: 3rd Symposium on Physiology and pathology of neuroglia; 2020 Noc 24-25; Virtual
Querétaro, México: Instituto de neurobiologia., 45.
https://hdl.handle.net/21.15107/rcub_ibiss_5514

Milićević K, Bijelić D, Lazarević M, Miljković Đ, Bogdanović Pristov J, Petković B, Anđus P, Momčilović M, Nikolić L. Central nervous system-infiltrated immune cells alter calcium dynamics in astrocytes. in Proceedings: 3rd Symposium on Physiology and pathology of neuroglia; 2020 Noc 24-25; Virtual. 2020;:45.
https://hdl.handle.net/21.15107/rcub_ibiss_5514 .

Milićević, Katarina, Bijelić, Dunja, Lazarević, Milica, Miljković, Đorđe, Bogdanović Pristov, Jelena, Petković, Branka, Anđus, Pavle, Momčilović, Miljana, Nikolić, Ljiljana, "Central nervous system-infiltrated immune cells alter calcium dynamics in astrocytes" in Proceedings: 3rd Symposium on Physiology and pathology of neuroglia; 2020 Noc 24-25; Virtual (2020):45,
https://hdl.handle.net/21.15107/rcub_ibiss_5514 .

TY  - CONF
AU  - Nikolić, Ljiljana
AU  - Korać, Jelena
AU  - Bijelić, Dunja
AU  - Spasojević, Ivan
AU  - Bogdanović Pristov, Jelena
PY  - 2019
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5510
AB  - Iron, an essential element for living organisms, participates in a wide range of metabolic
processes. It appears predominantly firmly bound to proteins, but can also be loosely bound to
low-affinity ligands, referred as labile iron pool (LIP). The composition and amount of LIP can
vary considerably under different physiological conditions, playing a beneficial role in iron
economy and homeostasis or contributing to the generation of reactive oxygen species. It is
still not known if bioactivity of low-affinity ligands can be modulated by iron binding.
Catecholamine neurotransmitters including norepinephrine (NE) can chelate iron. In the close
vicinity of synaptic cleft, astrocytes are direct target of norepinephrine. Here we show on
cultured rat cortical astrocytes that iron bound to NE completely blocks neurotransmitter
activity of NE. However, how astrocyte activity changes when norepinephrine binds iron
remains unknown.
We show, using spectrophotometry that NE and Fe3+ form complex in the 1:1 stoichiometry,
at pH 7.4. Iron effect on astrocyte response to NE was examined by the whole-cell patch-clamp
technique. NE alone evokes changes in the membrane currents of astrocytes, but such effects
were not observed for the NE- Fe3+ complex.
Our results demonstrating that iron in the complex with norepinephrine inhibits alpha-adrenergic
receptors and modulates astrocyte activity, imply a novel neuromodulatory role for LIP.
PB  - COST Action CA15133
C3  - Book of abstracts: 4th FeSBioNet Meeting: COST Action CA15133; 2019 Sep 16-19; Gdansk, Poland
T1  - Iron modulates norepinephrine effect on astrocytes
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5510
ER  - 

@conference{
author = "Nikolić, Ljiljana and Korać, Jelena and Bijelić, Dunja and Spasojević, Ivan and Bogdanović Pristov, Jelena",
year = "2019",
abstract = "Iron, an essential element for living organisms, participates in a wide range of metabolic
processes. It appears predominantly firmly bound to proteins, but can also be loosely bound to
low-affinity ligands, referred as labile iron pool (LIP). The composition and amount of LIP can
vary considerably under different physiological conditions, playing a beneficial role in iron
economy and homeostasis or contributing to the generation of reactive oxygen species. It is
still not known if bioactivity of low-affinity ligands can be modulated by iron binding.
Catecholamine neurotransmitters including norepinephrine (NE) can chelate iron. In the close
vicinity of synaptic cleft, astrocytes are direct target of norepinephrine. Here we show on
cultured rat cortical astrocytes that iron bound to NE completely blocks neurotransmitter
activity of NE. However, how astrocyte activity changes when norepinephrine binds iron
remains unknown.
We show, using spectrophotometry that NE and Fe3+ form complex in the 1:1 stoichiometry,
at pH 7.4. Iron effect on astrocyte response to NE was examined by the whole-cell patch-clamp
technique. NE alone evokes changes in the membrane currents of astrocytes, but such effects
were not observed for the NE- Fe3+ complex.
Our results demonstrating that iron in the complex with norepinephrine inhibits alpha-adrenergic
receptors and modulates astrocyte activity, imply a novel neuromodulatory role for LIP.",
publisher = "COST Action CA15133",
journal = "Book of abstracts: 4th FeSBioNet Meeting: COST Action CA15133; 2019 Sep 16-19; Gdansk, Poland",
title = "Iron modulates norepinephrine effect on astrocytes",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5510"
}

Nikolić, L., Korać, J., Bijelić, D., Spasojević, I.,& Bogdanović Pristov, J.. (2019). Iron modulates norepinephrine effect on astrocytes. in Book of abstracts: 4th FeSBioNet Meeting: COST Action CA15133; 2019 Sep 16-19; Gdansk, Poland
COST Action CA15133..
https://hdl.handle.net/21.15107/rcub_ibiss_5510

Nikolić L, Korać J, Bijelić D, Spasojević I, Bogdanović Pristov J. Iron modulates norepinephrine effect on astrocytes. in Book of abstracts: 4th FeSBioNet Meeting: COST Action CA15133; 2019 Sep 16-19; Gdansk, Poland. 2019;.
https://hdl.handle.net/21.15107/rcub_ibiss_5510 .

Nikolić, Ljiljana, Korać, Jelena, Bijelić, Dunja, Spasojević, Ivan, Bogdanović Pristov, Jelena, "Iron modulates norepinephrine effect on astrocytes" in Book of abstracts: 4th FeSBioNet Meeting: COST Action CA15133; 2019 Sep 16-19; Gdansk, Poland (2019),
https://hdl.handle.net/21.15107/rcub_ibiss_5510 .

TY  - CONF
AU  - Nikolić, Ljiljana
AU  - Bijelić, Dunja
AU  - Lazarević, Milica
AU  - Milićević, Katarina
AU  - Momčilović, Miljana
AU  - Bogdanović Pristov, Jelena
AU  - Petković, Branka
AU  - Anđus, Pavle
AU  - Miljković, Đorđe
PY  - 2019
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5500
AB  - Aims: Multiple sclerosis (MS) is an in ammatory autoimmune disorder of the central nervous system (CNS). Complex
interactions between in ltrating immune cells (IIC) and resident glial cells of the CNS cause myelin loss and neuronal dysfunction
in MS. Here we aim to understand how naïve astrocytes functionally respond to the IIC invasion of the CNS.
Methods: We measured calcium activity of naïve astrocytes in culture upon application of IIC. An experimental autoimmune
encephalomyelitis (EAE) MS rat model was used to isolate IIC from the spinal cord of animals at the symptomatic stage. Naïve
astrocytes were isolated from the spinal cord of WT rats.
Results: We show that IIC and not the lymph node immune cells evoke vigorous increase in the astrocyte calcium activity.
This IIC-induced calcium response depends on an autocrine activation of the purinergic P2X7 receptors on the naïve astrocytes.
We also show that IIC induce ATP release from astrocytes by a mechanism that involves gap junctions and/or hemichannels
activation and not the vesicular pathway. Our data indicate that ATP release and subsequent increase in the astrocytic calcium
activity mainly depends on the cell-cell contact between naïve astrocytes and IIC.
Conclusions: These results show that naïve astrocytes functionally respond to the IIC by augmented release of ATP. An increase
in ATP release would alter astrocyte-neuron communication and a ect neuronal function in MS.
PB  - Belgrade : Serbian Neuroscience Society
C3  - Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia
T1  - Astrocyte activity in the central nervous system autoimmunity
SP  - 295
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5500
ER  - 

@conference{
author = "Nikolić, Ljiljana and Bijelić, Dunja and Lazarević, Milica and Milićević, Katarina and Momčilović, Miljana and Bogdanović Pristov, Jelena and Petković, Branka and Anđus, Pavle and Miljković, Đorđe",
year = "2019",
abstract = "Aims: Multiple sclerosis (MS) is an in ammatory autoimmune disorder of the central nervous system (CNS). Complex
interactions between in ltrating immune cells (IIC) and resident glial cells of the CNS cause myelin loss and neuronal dysfunction
in MS. Here we aim to understand how naïve astrocytes functionally respond to the IIC invasion of the CNS.
Methods: We measured calcium activity of naïve astrocytes in culture upon application of IIC. An experimental autoimmune
encephalomyelitis (EAE) MS rat model was used to isolate IIC from the spinal cord of animals at the symptomatic stage. Naïve
astrocytes were isolated from the spinal cord of WT rats.
Results: We show that IIC and not the lymph node immune cells evoke vigorous increase in the astrocyte calcium activity.
This IIC-induced calcium response depends on an autocrine activation of the purinergic P2X7 receptors on the naïve astrocytes.
We also show that IIC induce ATP release from astrocytes by a mechanism that involves gap junctions and/or hemichannels
activation and not the vesicular pathway. Our data indicate that ATP release and subsequent increase in the astrocytic calcium
activity mainly depends on the cell-cell contact between naïve astrocytes and IIC.
Conclusions: These results show that naïve astrocytes functionally respond to the IIC by augmented release of ATP. An increase
in ATP release would alter astrocyte-neuron communication and a ect neuronal function in MS.",
publisher = "Belgrade : Serbian Neuroscience Society",
journal = "Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia",
title = "Astrocyte activity in the central nervous system autoimmunity",
pages = "295",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5500"
}

Nikolić, L., Bijelić, D., Lazarević, M., Milićević, K., Momčilović, M., Bogdanović Pristov, J., Petković, B., Anđus, P.,& Miljković, Đ.. (2019). Astrocyte activity in the central nervous system autoimmunity. in Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia
Belgrade : Serbian Neuroscience Society., 295.
https://hdl.handle.net/21.15107/rcub_ibiss_5500

Nikolić L, Bijelić D, Lazarević M, Milićević K, Momčilović M, Bogdanović Pristov J, Petković B, Anđus P, Miljković Đ. Astrocyte activity in the central nervous system autoimmunity. in Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia. 2019;:295.
https://hdl.handle.net/21.15107/rcub_ibiss_5500 .

Nikolić, Ljiljana, Bijelić, Dunja, Lazarević, Milica, Milićević, Katarina, Momčilović, Miljana, Bogdanović Pristov, Jelena, Petković, Branka, Anđus, Pavle, Miljković, Đorđe, "Astrocyte activity in the central nervous system autoimmunity" in Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia (2019):295,
https://hdl.handle.net/21.15107/rcub_ibiss_5500 .

TY  - CONF
AU  - Korać, Jelena
AU  - Nikolić, Ljiljana
AU  - Bijelić, Dunja
AU  - Spasojević, Ivan
AU  - Bogdanović Pristov, Jelena
PY  - 2019
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5501
AB  - Aims: Astrocyte position between synapses and blood vessels allows them to ful l crucial functions such as regulation of
synaptic activity and potassium bu ering. Well positioned in the close vicinity of synaptic cleft astrocytes are considered to be
a direct target of norepinephrine (NE). Synaptic activity and neurotransmitter actions can be in uenced by extracellular iron.
Here we investigated whether iron interacts with NE and if this interaction can modulate astrocyte response to NE.
Methods: To investigate the interaction between iron and norepinephrine we used spectrophotometry approach. Iron e ect
on astrocyte response to NE was examined by the whole-cell patch-clamp technique. Membrane currents were recorded from
cultured cortical astrocytes prepared from WT rats.
Results: Using spectrophotometry we observed that iron interacts with NE which leads to the formation of a stable complex
in the 1:1 stoichiometry. We also found that iron bound to NE completely blocks NE-induced increase of large-conductance
calcium sensitive potassium current in astrocytes.
Conclusions: Astrocyte response to NE is modi ed when this neurotransmitter forms a complex with iron. This implies that
NE binding to astrocytic noradrenergic receptors may be prevented by iron. Our  ndings point toward compromised astrocyte
functions related to the potassium bu ering when NE action is modi ed by iron.
PB  - Belgrade : Serbian Neuroscience Society
C3  - Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia
T1  - Iron modulates norepinephrine effect on astrocytes
SP  - 370
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5501
ER  - 

@conference{
author = "Korać, Jelena and Nikolić, Ljiljana and Bijelić, Dunja and Spasojević, Ivan and Bogdanović Pristov, Jelena",
year = "2019",
abstract = "Aims: Astrocyte position between synapses and blood vessels allows them to ful l crucial functions such as regulation of
synaptic activity and potassium bu ering. Well positioned in the close vicinity of synaptic cleft astrocytes are considered to be
a direct target of norepinephrine (NE). Synaptic activity and neurotransmitter actions can be in uenced by extracellular iron.
Here we investigated whether iron interacts with NE and if this interaction can modulate astrocyte response to NE.
Methods: To investigate the interaction between iron and norepinephrine we used spectrophotometry approach. Iron e ect
on astrocyte response to NE was examined by the whole-cell patch-clamp technique. Membrane currents were recorded from
cultured cortical astrocytes prepared from WT rats.
Results: Using spectrophotometry we observed that iron interacts with NE which leads to the formation of a stable complex
in the 1:1 stoichiometry. We also found that iron bound to NE completely blocks NE-induced increase of large-conductance
calcium sensitive potassium current in astrocytes.
Conclusions: Astrocyte response to NE is modi ed when this neurotransmitter forms a complex with iron. This implies that
NE binding to astrocytic noradrenergic receptors may be prevented by iron. Our  ndings point toward compromised astrocyte
functions related to the potassium bu ering when NE action is modi ed by iron.",
publisher = "Belgrade : Serbian Neuroscience Society",
journal = "Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia",
title = "Iron modulates norepinephrine effect on astrocytes",
pages = "370",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5501"
}

Korać, J., Nikolić, L., Bijelić, D., Spasojević, I.,& Bogdanović Pristov, J.. (2019). Iron modulates norepinephrine effect on astrocytes. in Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia
Belgrade : Serbian Neuroscience Society., 370.
https://hdl.handle.net/21.15107/rcub_ibiss_5501

Korać J, Nikolić L, Bijelić D, Spasojević I, Bogdanović Pristov J. Iron modulates norepinephrine effect on astrocytes. in Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia. 2019;:370.
https://hdl.handle.net/21.15107/rcub_ibiss_5501 .

Korać, Jelena, Nikolić, Ljiljana, Bijelić, Dunja, Spasojević, Ivan, Bogdanović Pristov, Jelena, "Iron modulates norepinephrine effect on astrocytes" in Book of Abstract: Federation of European Neuroscience Societies (FENS) Regional Meeting; 2019 Jul 10-13; Belgrade, Serbia (2019):370,
https://hdl.handle.net/21.15107/rcub_ibiss_5501 .

TY  - JOUR
AU  - Milošević, Milena
AU  - Milićević, Katarina
AU  - Božić, Iva
AU  - Lavrnja, Irena
AU  - Stevanović, Ivana
AU  - Bijelić, Dunja
AU  - Dubaić, Marija
AU  - Živković, Irena
AU  - Stević, Zorica
AU  - Giniatullin, Rashid
AU  - Andjus, Pavle
PY  - 2017
UR  - http://journal.frontiersin.org/article/10.3389/fimmu.2017.01619/full
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/2928
AB  - Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder with a very fast progression, no diagnostic tool for the presymptomatic phase, and still no effective treatment of the disease. Although ALS affects motor neurons, the overall pathophysiological condition points out to the non-cell autonomous mechanisms, where astrocytes and microglia play crucial roles in the disease progression. We have already shown that IgG from sera of ALS patients (ALS IgG) induce calcium transients and an increase in the mobility of acidic vesicles in cultured rat astrocytes. Having in mind the role of microglia in neurodegeneration, and a well-documented fact that oxidative stress is one of the many components contributing to the disease, we decided to examine the effect of ALS IgG on activation, oxidative stress and antioxidative system of BV-2 microglia, and to evaluate their acute effect on cytosolic peroxide, pH, and on reactive oxygen species (ROS) generation. All tested ALS IgGs (compared to control IgG) induced oxidative stress (rise in nitric oxide and the index of lipid peroxidation) followed by release of TNF-α and higher antioxidative defense (elevation of Mn- and CuZn-superoxide dismutase, catalase, and glutathione reductase with a decrease of glutathione peroxidase and glutathione) after 24 h treatment. Both ALS IgG and control IgG showed same localization on the membrane of BV-2 cells following 24 h treatment. Cytosolic peroxide and pH alteration were evaluated with fluorescent probes HyPer and SypHer, respectively, having in mind that HyPer also reacts to pH changes. Out of 11 tested IgGs from ALS patients, 4 induced slow exponential rise of HyPer signal, with maximal normalized fluorescence in the range 0.2–0.5, also inducing similar increase of SypHer intensity, but of a lower amplitude. None of the control IgGs induced changes with neither of the indicators. Acute ROS generation was detected in one out of three tested ALS samples with carboxy-H2DCFDA. The observed phenomena demonstrate the potential role of inflammatory humoral factors, IgGs, as potential triggers of the activation in microglia, known to occur in later stages of ALS. Therefore, revealing the ALS IgG signaling cascade in microglial cells could offer a valuable molecular biomarker and/or a potential therapeutic target.
T2  - Frontiers in Immunology
T1  - Immunoglobulins G from Sera of Amyotrophic Lateral Sclerosis Patients Induce Oxidative Stress and Upregulation of Antioxidative System in BV-2 Microglial Cell Line
IS  - NOV
VL  - 8
DO  - 10.3389/fimmu.2017.01619
SP  - 1619
ER  - 

@article{
author = "Milošević, Milena and Milićević, Katarina and Božić, Iva and Lavrnja, Irena and Stevanović, Ivana and Bijelić, Dunja and Dubaić, Marija and Živković, Irena and Stević, Zorica and Giniatullin, Rashid and Andjus, Pavle",
year = "2017",
abstract = "Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder with a very fast progression, no diagnostic tool for the presymptomatic phase, and still no effective treatment of the disease. Although ALS affects motor neurons, the overall pathophysiological condition points out to the non-cell autonomous mechanisms, where astrocytes and microglia play crucial roles in the disease progression. We have already shown that IgG from sera of ALS patients (ALS IgG) induce calcium transients and an increase in the mobility of acidic vesicles in cultured rat astrocytes. Having in mind the role of microglia in neurodegeneration, and a well-documented fact that oxidative stress is one of the many components contributing to the disease, we decided to examine the effect of ALS IgG on activation, oxidative stress and antioxidative system of BV-2 microglia, and to evaluate their acute effect on cytosolic peroxide, pH, and on reactive oxygen species (ROS) generation. All tested ALS IgGs (compared to control IgG) induced oxidative stress (rise in nitric oxide and the index of lipid peroxidation) followed by release of TNF-α and higher antioxidative defense (elevation of Mn- and CuZn-superoxide dismutase, catalase, and glutathione reductase with a decrease of glutathione peroxidase and glutathione) after 24 h treatment. Both ALS IgG and control IgG showed same localization on the membrane of BV-2 cells following 24 h treatment. Cytosolic peroxide and pH alteration were evaluated with fluorescent probes HyPer and SypHer, respectively, having in mind that HyPer also reacts to pH changes. Out of 11 tested IgGs from ALS patients, 4 induced slow exponential rise of HyPer signal, with maximal normalized fluorescence in the range 0.2–0.5, also inducing similar increase of SypHer intensity, but of a lower amplitude. None of the control IgGs induced changes with neither of the indicators. Acute ROS generation was detected in one out of three tested ALS samples with carboxy-H2DCFDA. The observed phenomena demonstrate the potential role of inflammatory humoral factors, IgGs, as potential triggers of the activation in microglia, known to occur in later stages of ALS. Therefore, revealing the ALS IgG signaling cascade in microglial cells could offer a valuable molecular biomarker and/or a potential therapeutic target.",
journal = "Frontiers in Immunology",
title = "Immunoglobulins G from Sera of Amyotrophic Lateral Sclerosis Patients Induce Oxidative Stress and Upregulation of Antioxidative System in BV-2 Microglial Cell Line",
number = "NOV",
volume = "8",
doi = "10.3389/fimmu.2017.01619",
pages = "1619"
}

Milošević, M., Milićević, K., Božić, I., Lavrnja, I., Stevanović, I., Bijelić, D., Dubaić, M., Živković, I., Stević, Z., Giniatullin, R.,& Andjus, P.. (2017). Immunoglobulins G from Sera of Amyotrophic Lateral Sclerosis Patients Induce Oxidative Stress and Upregulation of Antioxidative System in BV-2 Microglial Cell Line. in Frontiers in Immunology, 8(NOV), 1619.
https://doi.org/10.3389/fimmu.2017.01619

Milošević M, Milićević K, Božić I, Lavrnja I, Stevanović I, Bijelić D, Dubaić M, Živković I, Stević Z, Giniatullin R, Andjus P. Immunoglobulins G from Sera of Amyotrophic Lateral Sclerosis Patients Induce Oxidative Stress and Upregulation of Antioxidative System in BV-2 Microglial Cell Line. in Frontiers in Immunology. 2017;8(NOV):1619.
doi:10.3389/fimmu.2017.01619 .

Milošević, Milena, Milićević, Katarina, Božić, Iva, Lavrnja, Irena, Stevanović, Ivana, Bijelić, Dunja, Dubaić, Marija, Živković, Irena, Stević, Zorica, Giniatullin, Rashid, Andjus, Pavle, "Immunoglobulins G from Sera of Amyotrophic Lateral Sclerosis Patients Induce Oxidative Stress and Upregulation of Antioxidative System in BV-2 Microglial Cell Line" in Frontiers in Immunology, 8, no. NOV (2017):1619,
https://doi.org/10.3389/fimmu.2017.01619 . .