Laboratory of Pancreatic Islet Research

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Laboratory of Pancreatic Islet Research - rm1g7hz1ph3tkwq9a53j

About the Laboratory

The ability of β-cells to function as glucose sensors is crucial for maintaining glucose homeostasis throughout life. A decline in β-cell function and quantity is a key indicator of diabetes onset and progression. The activity of β-cells is closely interlinked with other endocrine cells in the pancreatic islets. While insulin was discovered over a century ago (in 1922) and its main secretion pathways are well understood, much remains unknown about the molecular mechanisms within β-cells and pancreatic islets. This knowledge is essential for developing effective strategies to prevent and treat diabetes, one of the most pressing global health challenges.


Our laboratory focuses on exploring the role of redox homeostasis in insulin secretion under both normal physiological conditions and in the context of pathological pro-oxidative signaling, which contributes to diabetes development. We employ a range of models, from cell cultures and isolated mouse islets of Langerhans to whole-animal studies in mice, to investigate pancreatic β-cell and islet biology. By combining innovative experimental approaches with advanced omics technologies, we aim to uncover new insights that can drive the prevention and treatment of diabetes.

Laboratory of Pancreatic Islet Research - islets movement

Fluorescent insulin injected into a mouse pancreatic islet

 

Achievements

We successfully identified the role of NADPH oxidase 4 (NOX4) in regulating glucose-stimulated insulin secretion (Plecitá-Hlavatá, L., 2020, Diabetes). Additionally, we have uncovered key protein targets involved in this redox signaling pathway (Holendova, B., 2024, Metabolism). Our research also demonstrated that chronic NOX4 activity, triggered by metabolic stress such as prolonged overeating, leads to inflammasome activation and localized inflammation (Holendova, B., 2024, Obesity).

Publications

Holendová; Blanka - Benáková; Štěpánka - Křivonosková; Monika - Plecitá-Hlavatá; Lydie Redox Status as a Key Driver of Healthy Pancreatic ?-Cells. Physiological Research. 2024; 73(Suppl.1); S139-S152.

IF = 1.9

Li; M. - Plecitá-Hlavatá; Lydie - Dobrinskikh; E. - McKeon; B. A. - Gandjeva; A. - Riddle; S. - Laux; A. - Prasad; R. R. - Kumar; S. - Tuder; R. M. - Zhang; H. - Hu; Ch.-J. - Stenmark; K. R. SIRT3 Is a Critical Regulator of Mitochondrial Function of Fibroblasts in Pulmonary Hypertension. American Journal of Respiratory Cell and Molecular Biology. 2023; 69(5); 570-583.

IF = 5.9

Holendová; Blanka - Plecitá-Hlavatá; Lydie Cysteine residues in signal transduction and its relevance in pancreatic beta cells. Frontiers in Endocrinology. 2023; 14(Jun 29); 1221520.

IF = 3.9

Benák; Daniel - Benáková; Štěpánka - Plecitá-Hlavatá; Lydie - Hlaváčková; Markéta The role of m6A and m6Am RNA modifications in the pathogenesis of diabetes mellitus. Frontiers in Endocrinology. 2023; 14(July); 1223583.

IF = 3.9

Holendová; Blanka - Benáková; Štěpánka - Křivonosková; Monika - Pavluch; Vojtěch - Tauber; Jan - Gabrielová; E. - Ježek; Petr - Plecitá-Hlavatá; Lydie NADPH oxidase 4 in mouse ? cells participates in inflammation on chronic nutrient overload. Obesity. 2024; 32(2); 339-351.

IF = 4.2

Plecitá-Hlavatá; Lydie - Brázdová; Andrea - Křivonosková; Monika - Hu; Ch.-J. - Phang; T. - Tauber; Jan - Li; M. - Zhang; H. - Hoetzenecker; K. - Crnkovic; S. - Kwapiszewska; G. - Stenmark; K. R. Microenvironmental regulation of T-cells in pulmonary hypertension. Frontiers in Immunology. 2023; 14(Jul 11); 1223122.

IF = 5.7

People

Head of Laboratory

Head of laboratory
Tel: 2430
Email: lydie.plecita@fgu.cas.cz

Deputy Head of Laboratory

Associate scientist
Tel: 2430
Email: blanka.holendova@fgu.cas.cz

Laboratory staff

Graduate student
Tel: 2447
Email: stepanka.benakova@fgu.cas.cz
Graduate student
Tel: 2447
Email: monika.krivonoskova@fgu.cas.cz
Lab technician
Tel: 2447
Email: linda.stokicova@fgu.cas.cz
Lab technician
Tel: 2447
Email: ludmila.svobodova@fgu.cas.cz