Garcia-Souza Luiz F

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BEC 2020.1 Mitochondrial physiology
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COST Action CA15203 (2016-2021): MitoEAGLE
Evolution-Age-Gender-Lifestyle-Environment: mitochondrial fitness mapping

Garcia-Souza Luiz F

MitoPedia topics: EAGLE 

COST: Member COST WG1: WG1


Name Garcia-Souza Luiz Felipe, MSc, PhD
Luiz Felipe Garcia-Souza

Medical University of Innsbruck

Luiz joined Oroboros Instruments in August 2016 until October 2022.

Address Innrain 80, A-6020
City Innsbruck
Country Austria
Email [email protected]
Weblink ResearchGate
O2k-Network Lab AT Innsbruck Oroboros, BR Rio de Janeiro Oliveira MF


Topics: platelet, thrombin, activation 


Leo 2024 MitoFit2024Leo E, Rychtarova L, Garcia-Souza LF, Åsander Frostner E, Elmér E, Gnaiger E (2024) High-resolution respirometry in a small-volume chamber. MitoFit Preprints 2024.4.v2.
Fischer 2022 Metabolites2022Fischer C, Valente de Souza L, Komlódi T, Garcia-Souza LF, Volani C, Tymoszuk P, Demetz E, Seifert M, Auer K, Hilbe R, Brigo N, Petzer V, Asshoff M, Gnaiger E, Weiss G (2022) Mitochondrial respiration in response to iron deficiency anemia. Comparison of peripheral blood mononuclear cells and liver.
Hoppel 2021 Cells2021Hoppel F, Garcia-Souza LF, Kantner-Rumplmair W, Burtscher M, Gnaiger E, Pesta D, Calabria E (2021) Human platelet mitochondrial function reflects systemic mitochondrial alterations: a protocol for application in field studies.
Vernerova 2021 Biomedicines2021Vernerova A, Garcia-Souza LF, Soucek O, Kostal M, Rehacek V, Krcmova LK, Gnaiger E, Sobotka O (2021) Mitochondrial respiration of platelets: comparison of isolation methods.
MitoEAGLE blood cells 12020Åsander Frostner Eleonor*, Aburel Oana M*, Avram Vlad F*, Calabria Elisa, Castelo Rueda Maria Paulina*, Chamkha Imen*, Čižmárová Beata, Danila Maria-Daniela*, Doerrier Carolina*, Eckert Gunter P*, Ehinger Johannes K, Elmer Eskil*, Garcia-Souza Luiz F*, Gnaiger Erich*, Hoppel Florian*, Karabatsiakis Alexander*, Keppner Gloria, Kidere Dita*, Krako Jakovljević Nina, Labieniec-Watala Magdalena*, Lelcu Theia*, Micankova Petra, Michalak Slawomir*, Molina Anthony JA*, Pavlovic Kasja, Pichler Irene*, Piel Sarah, Rousar Tomas, Rybacka-Mossakowska Joanna, Schartner Melanie, Siewiera Karolina*, Silaidos Carmina*, Sjövall Fredrik*, Sobotka Ondrej*, Sumbalova Zuzana*, Swiniuch Daria, Vernerova Andrea*, Volani Chiara*, Vujacic-Mirski Ksenija*, Watala Cezary* (2020) Interlaboratory guide to mitochondrial respiratory studies with peripheral blood mononuclear cells and platelets. - Updated: 2020-03-06 - *Confirmed
BEC 2020.1 doi10.26124bec2020-0001.v12020Gnaiger E et al ― MitoEAGLE Task Group (2020) Mitochondrial physiology. Bioenerg Commun 2020.1.
Doerrier 2018 Methods Mol Biol2018Doerrier C, Garcia-Souza LF, Krumschnabel G, Wohlfarter Y, Mészáros AT, Gnaiger E (2018) High-Resolution FluoRespirometry and OXPHOS protocols for human cells, permeabilized fibers from small biopsies of muscle, and isolated mitochondria. Methods Mol Biol 1782:31-70.
Gatterer 2018 J Sports Sci Med2018Gatterer H, Menz V, Salazar-Martinez E, Sumbalova Z, Garcia-Souza LF, Cizmarova B, Gnaiger E, Burtscher M (2018) Exercise performance, muscle oxygen extraction and blood cell mitochondrial respiration after repeated-sprint and sprint interval training in hypoxia: a pilot study. J Sports Sci Med 17:339-347.
Sumbalova 2018 Nova Sciences2018Sumbalová Z, Garcia-Souza LF, Cizmarova B, Volani C, Gnaiger E (2018) Analysis of mitochondrial function in human blood cells. In: Recent advances in mitochondrial medicine and coenzyme Q10. Gvozdjáková A, Cornelissen G, Singh RB eds, Nova Sciences:255-68.
Rochael 2015 Sci Rep2015Rochael NC, Guimarães-Costa AB, Nascimento MT, DeSouza-Vieira TS, Oliveira MP, Garcia-Souza LF, Oliveira MF, Saraiva EM (2015) Classical ROS-dependent and early/rapid ROS-independent release of neutrophil extracellular traps triggered by Leishmania parasites. Sci Rep 5:18302.
Garcia-Souza 2014 Int J Biochem Cell Biol2014Garcia-Souza LF, Oliveira MF (2014) Mitochondria: Biological roles in platelet physiology and pathology. Int J Biochem Cell Biol 50:156-60.
Japiassu 2011 Crit Care Med2011Japiassu AM, Santiago AP, d'Avila Jda C, Garcia-Souza LF, Galina A, Castro Faria-Neto HC, Bozza FA, Oliveira MF (2011) Bioenergetic failure of human peripheral blood monocytes in patients with septic shock is mediated by reduced F1Fo adenosine-5'-triphosphate synthase activity. Crit Care Med 39:1056-63.


Komlodi 2023 EUROMIT2023 Bologna2023Komlódi T, Silva FSG, Duarte AI, Mena D, Garcia-Souza LF, Makrecka-Kuka M, Bento G, Grilo LF, Oliveira PJ, Gnaiger E (2023) Off-target effects of etomoxir: inhibition of mitochondrial Complex I and fatty acid oxidation. EUROMIT2023 International Conference on Mitochondrial Pathology.
Timon-Gomez 2023 GIBB2023
Timon-Gomez Alba
Timón-Gómez A, Cardoso LHD, Doerrier C, Garcia-Souza LF, Gnaiger E (2023) A reference substrate-uncoupler-inhibitor titration protocol to create a mitochondrial pathway and coupling control database. Third international GIBB meeting.
Leo 2023 ESCI Prague2023
Leo Elettra
Leo E, Zdrazilova L, Garcia-Souza LF, Åsander-Frostner E, Elmér E, Gnaiger E (2023) High-resolution respirometry is comparable in 0.5 mL and 2.0 mL chamber volumes: studies with platelets, permeabilized fibroblasts, and isolated mitochondria. 57th Annual Scientific Meeting of the European Society for Clinical Investigation.
Cardoso 2023 BPS2023 San Diego2023
Erich Gnaiger
Cardoso LHD, Timon-Gomez A, Doerrier C, Garcia-Souza LF, Gnaiger Erich (2023) Respirometric substrate-uncoupler-inhibitor titration protocols for carbohydrate and fatty acid metabolism: from heart to brain mitochondria. 67th Annual Meeting of the Biophysical Society.
Garcia-Souza 2022 Bioblast20222022
Luiz F Garcia-Souza
Bioblast 2022 participant.
Cardoso 2019 MiP20192019
Luiza Cardoso
Effects of glucose concentration in cell culture media on hepatocellular carcinoma HuH7 cells evaluated by high-resolution respirometry.
Silva 2019 MiPschool Coimbra2019
Filomena Pereira da Silva Grilo da Silva
Off-target effects of etomoxir on mitochondrial Complex I.
Calabria 2019 MiPschool Coimbra2019
Elisa Calabria
Investigating mitochondrial function in blood cells by high-resolution respirometry: contribution to an interlaboratory study. MitoEAGLE WG4.
Silva 2019 ESCI20192019Silva FSG, Komlodi T, Garcia-Souza LF, Bento G, Doerrier C, Oliveira PJ, Gnaiger E (2019) Can fatty acid oxidation be specifically blocked by the CPT1 inhibitor etomoxir?
Gnaiger 2019 NatureConference2019Gnaiger E, Passrugger M, Gallee L, Felipe F Garcia-Souza, Zdrazilova L, Doerrier C (2019) High-resolution respirometry and innovations in the Oroboros O2k-technology.
Garcia-Souza 2018 Life Sciences Meeting 2018 Innsbruck AT2018A respirometric cell viability test for peripheral-blood mononuclear cells and platelets.
Doerrier 2018 MiP2018b2018
Carolina Doerrier
Evaluation of anaplerotic pathways to avoid artefacts in respirometric measurement of fatty acid oxidation.
Pereira da Silva Grilo da Silva 2018 MiP20182018
Filomena Pereira da Silva Grilo da Silva
The unspecific effect of etomoxir on mitochondrial respiration.
Doerrier 2018 EBEC20182018
Carolina Anneliese Doerrier
Respiratory mapping of mitochondrial pathways for establishing a database of mitochondrial physiology.
Doerrier 2018 ESCI20182018
Carolina Anneliese Doerrier
High-resolution respirometry, two techniques combined in one to explore mitochondrial function in health and disease
Sumbalova 2017 MiP20172017
Zuzana Sumbalova
The effect of lifestyle on respiration of peripheral blood mononuclear cells and platelets.
Sumbalova 2017 MiP2017 WG42017
Zuzana Sumbalova
Purity of blood cell fractions in respirometric studies: peripheral blood mononuclear cells and platelets.
Garcia-Souza 2017 MiP20172017
Luiz Garcia
Short-term acclimatization to moderate altitude does not affect respiration of peripheral blood mononuclear cells and platelets.
Cizmarova 2017 MiP20172017
Beate Cizmarova
PBMC cryopreservation and evaluation for functional mitochondrial diagnosis.
Cizmarova 2017 MITOEAGLE Obergurgl2017
Beata Cizmarova
High-resolution respirometry and viability of cryopreserved blood cells.
Garcia-Souza 2017 MITOEAGLE Obergurgl2017
Towards a database on PBMC mitochondrial respiration: first steps on a literature survey linked to the MitoFit experimental data.
Cizmarova 2017 MiPschool Obergurgl2017
Beata Cizmarova
The scope of cryopreservation in blood cells for functional mitochondrial diagnosis.
Garcia-Souza 2017 MiPschool Obergurgl2017
Luiz Garcia-Souza
Assessment of mitochondrial respiratory function in cryopreserved platelets.
Laner 2017 Abstract EUROMIT2017 Cologne2017
K-Regio MitoFit and MitoEAGLE – towards a global data bank on mitochondrial physiology.
Cizmarova 2017 Abstract MITOEAGLE Barcelona2017
Optimization of cryopreservation of human peripheral blood mononuclear cells and platelets for high-resolution respirometry.
Garcia-Souza 2016 Abstract Mito Xmas Meeting Innsbruck2016Assessment of fatty acid oxidation in mouse brain and liver mitochondria.
Doerrier 2016a Abstract Mito Xmas Meeting Innsbruck2016
K-Regio MitoFit and MitoEAGLE – towards a global data bank on mitochondrial physiology.
Sumbalova 2016b Abstract MitoFit Science Camp 20162016Human blood cells: isolation and HRR.
Garcia-Souza 2013 Abstract IOC802013Garcia-Souza LF (2013) Thrombin trigger mitochondrial functional remodeling in human platelets. Mitochondr Physiol Network 18.09.

MitoEAGLE Short-Term Scientific Mission

Work Plan summary
Examination of platelet (PLT) function is a topic neglected in hematology mainly due to the unavailability of suitable methods. The gold standard today is the examination of optical aggregometry, which is an easily available method, but has low w and is usually difficult to interpret. Electron microscopy and other examinations do not clearly target PLT functionality. A simple PLT count (especially in the case of deep thrombocytopenia) creates a false impression of bleeding diathesis. Even a small number of PLT, usually about 10 to 30 mio/mL, is enough for effective hemostasis, as shown in the case of immune thrombocytopenia. Knowledge of functional activity in these cases could eliminate the need to discontinue anticoagulant treatment or prophylaxis and thus improve patient quality of life.
Thanks to modern high-resolution respirometers, we can analyze and study the metabolic profile and function of PLT and peripheral blood mononuclear cells (PBMC) isolated from a small amount of venous blood. Respirometry with PLT isolated from peripheral blood by differential centrifugation provides an adequate alternative for the study of human and non-hematologic diseases with minimal risk to patients. As a result, this research has attracted the attention of the scientific community in recent years as a possible experimental model in various medical applications and cell research. As an example, outside the hematology field, it was shown that increased respiration of PLT from septic patients correlates with an increase in pro-inflammatory cytokines in the bloodstream. Similarly, the change in mitochondrial PBMC function was correlated with systemic dysfunctions during hemorrhagic shock and resuscitation. A recent study demonstrated a change in the metabolic profile of PLT in diabetic rats.
With an increasing database collected by various groups worldwide, we encounter methodological problems discrediting data reproducibility and disallowing further progress of this method to clinical practice. The main concerns and discrepancies were observed in the preparation of the sample, specifically the isolation procedure used to obtain quality control of PLT and PBMC. Different types of anticoagulants, different isolation procedures and the respiratory measurement protocol itself have not been standardized until recently and are therefore the subject of intensive research and discussion in expert forums in the frame of international project MitoEAGLE (COST Action CA15203).
Blood transfusions are necessary for the treatment of various pathological conditions and have been used for decades worldwide. The therapeutic benefits of PLT transfusions are generally acknowledged by medical professionals and the process of separating and storing PLT concentrates has been documented in detail. However, improvement of the function and life of PLT transfusions is still under investigation.
The aim of this project is to introduce differential centrifugation methodology in the University Hospital in Hradec Kralove and to compare mitochondrial respiration of PLT obtained by this method and by single donor apheresis from healthy donors.
After developing a reproducible quality control, we plan to use this methodology mainly in patients after chemotherapy, bone marrow infiltration or septic conditions. For these patients, thrombocytopenia is usually transient but especially limiting because of the apparent risk of intensive bleeding. Another area of use is the diagnosis of immune thrombocytopenia, which is currently still a diagnosis “per exclusionem” due to lack of diagnostic methods. Immune thrombocytopenia is characterized by an increased production and destruction of otherwise functional platelets. Unfortunately, there is no test that would otherwise demonstrate good platelet function and thus facilitate differential diagnosis of platelet pathologies. Including a functional test for platelet activity and verifying its relevance to individual diagnoses would greatly facilitate orientation in the subject and would have clear clinical applications in hematological practice. Thanks to the metabolic role of mitochondria, this methodology can be also applied to study metabolic diseases in both clinical and basic research: 1) in septic patients receiving full parenteral nutrition; 2) in the development of acute light and severe pancreatitis; 3) obese diabetic patients during two-week weight reduction hospitalization.

Work Plan summary
A rapidly increasing number of human pathologies is linked to mitochondrial dysfunction. During the past few years,blood cells such as peripheral blood mononuclear cells (PBMCs) and platelets (PLTs) have become the targets in investigations on various pathologies, particularly as potential alternatives to the invasive sampling of tissue biopsies. However, standard operating procedures for mitochondrial respiratory studies of blood cells are still missing. A key towards achieving comparability among data sets and the applicability of human blood cells for the evaluation of mitochondrial fitness in health and disease is the standardization of the procedures to separate or isolate blood cells, the experimental procedure for the evaluation of mitochondrial respiratory characteristics, and the format for reporting. Publications regarding PBMC and PLT respiration, lack harmonization. Application of different anticoagulants, different isolation methods and storage, and different respiratory protocols make it impossible to compare results on a quantitative basis. In a previous WG4 meeting (Lund 2018-05-28), it was reported that during measurements of H2O2 production of Permeabilized PLT, it was observed a rapid increase in H2O2 production after titration of digitonin. However, other groups reported that this phenomenon was not observed in their experiments. To achieve comparability of results, we propose in this STSM to compare PLT isolation methods from Prof. Dr. Eskil Elmer’s lab (MitoEAGLE Lund’s protocol) and Prof. Dr. Erich Gnaiger’s lab (MitoEAGLE Innsbruck protocol). Comparing these protocols in the same subjects, we can define a standard protocol for future projects in Lund, Innsbruck, and perhaps among other labs participating in MitoEAGLE. For this project, PLTs will be isolated from whole blood using both protocol from the same blood sample. After isolation, PLTs will be submitted to flow cytometry, respirometry and fluorometry. Remnants cell will be cryopreserved. Flow cytometry: Activation markers, such as CD-62P and Annexin-V. To be certain that our new viability method can be applied to platelets, it is necessary to use different (activation) markers to correlate with our respirometric data. Suggested markers: (A) Pselectin (CD62P) - activation marker, the more stressed/activated, more expression is detected on the surface of platelets. Respirometry: A respiration protocol was developed a substrate-uncoupler-inhibitor titration protocol to measure respiratory control in intact cells and cell viability in an integrated assay: the coupling control and cell viability protocol (SUIT 7, CCVP). The respirometric CCVP viability test can be applied to platelets. Due to their small size there is no comparable method available, since standard tests are linked to activation markers rather than cell viability. The combination of these experiments provide data to compare activation induced by PLT isolation and validate the respirometric viability test to PLT simultaneously. Fluorometry: H2O2 assessment will be performed in parallel to respiration. SUIT 9 is a short, simple protocol that can address the issue of “oxidative burst” reported in WG4 meeting. With this experiment, we can investigate and adjust our isolation protocols to avoid unpredictable measurement artifacts. Experimental details (respirometry): • Number of donors: 4 to 5 • Respiration media: MiR05 •Cell type: freshly isolated PLT Protocols (respirometry/Fluorometry): • AmR_SUIT 9_pce: 1S;2D;3P;4Ama • SUIT 7: ce1;ce2P;ce3Omy;ce4U*;ce5Glc;ce6M2;ce7Rot;ce8S;1Dig*;1U*;1c; 2Ama;3AsTm;4Azd Experimental details (flow cytometry): • Number of donors: 4 to 5 Incubation: 20 min, RT, Tyrode modified (137 mM NaCl, 2,68 mM KCI, 5 mM HEPES, 1 mM MgCl2, 11,9 mM NaHCO3, 0,42 mM NaH2PO4 and 5,6 mM glucose; pH 7,4) Marker: • CD62P Cryopreservation: • Cryopreservation media: Autologous plasma+10 mM EGTA +10%DMSO • Storage temperature: -80 ºC, for 1 week

Participated at

Visiting scientist in the Oroboros O2k-Laboratory


Garcia-Souza Luiz F: Visiting scientist at the Oroboros O2k-Laboratory

  • 2016, February 15 to March 15
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