Article
Biochemistry & Molecular Biology
Fawzi Khoder-Agha, Thomas Kietzmann
Summary: Reactive oxygen species (ROS) and glycans play crucial roles in cells, both dynamically responding to stressors to maintain cellular balance. The delicate balance of redox potential and glycan biosynthesis vitality are essential for cell survival.
Review
Plant Sciences
Jianjun Zhang, Jiarui Wu, Linchuan Liu, Jianming Li
Summary: Proteins are glycosylated in the ER for proper folding and function, and misfolded proteins can be toxic to cells. Eukaryotic organisms have evolved ERQC mechanisms to monitor and deal with misfolded proteins in order to maintain cellular homeostasis.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Cell Biology
Philip John Robinson, Marie Anne Pringle, Bethany Fleming, Neil John Bulleid
Summary: Proteins in the secretory pathway require correct disulfide pairings for proper folding. Two important members of the protein disulfide isomerase (PDI) family, ERp57 and ERdj5, have unclear roles in disulfide formation, but ERp57 is involved in the isomerisation of non-native disulfides in glycoproteins. Alternative PDIs can compensate for the absence of ERp57 in isomerising glycoprotein disulfides, but only when a robust reductive pathway is present. ERdj5 is required for this alternative pathway as a reductase. These findings clarify the essential functions of two PDIs in the cell and highlight the distinctions between formation, reduction, and isomerisation of disulfide bonds.
JOURNAL OF CELL SCIENCE
(2023)
Review
Biochemistry & Molecular Biology
Mari A. Piirainen, Alexander D. Frey
Summary: Yeasts are widely used for biopharmaceutical production, but N-glycosylated biopharmaceuticals manufactured with yeasts are missing on the market. N-linked glycans play crucial roles in protein properties and folding, but current glycoengineering approaches face challenges.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2022)
Review
Biophysics
Judy L. M. Kotler, Timothy O. Street
Summary: The Hsp40, Hsp70, and Hsp90 chaperone families play important roles in cellular protein homeostasis. Recent studies have explored the possibility of understanding how these chaperones work together as a unified system. This review focuses on the mechanics of ERdj3 (an Hsp40), BiP (an Hsp70), and Grp94 (an Hsp90) chaperones within the endoplasmic reticulum, examining their interactions and the gaps in our understanding. Calculations are also used to investigate the impacts of client transfer on protein solubilization, protein folding, and triage decisions for protein degradation. Experimental tests of the proposed roles of client transfer among Hsp40-Hsp70-Hsp90 chaperones are discussed.
ANNUAL REVIEW OF BIOPHYSICS
(2023)
Review
Physiology
Vitalii Kryvenko, Istvan Vadasz
Summary: Protein transcription, translation, and folding are essential processes in living cells, with the endoplasmic reticulum (ER) playing a crucial role in these functions. Elevated CO2 levels can impair ER function, leading to both adaptive and maladaptive regulation of protein folding and maturation.
FRONTIERS IN PHYSIOLOGY
(2021)
Review
Plant Sciences
Sofia Reyes-Impellizzeri, Adrian A. Moreno
Summary: This review focuses on the impact of alterations in components of ERQC, ERAD, and UPR on plant responses to abiotic stresses. Evidence shows a clear connection between ERAD and UPR mechanisms, but the connection of ERQC components with these processes or their possible client proteins is lacking. Proteomics approaches are suggested to uncover the identity of these proteins and their connection to ER proteostasis.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Cell Biology
Nicholas McCaul, Matthias Quandte, Ilja Bontjer, Guus van Zadelhoff, Aafke Land, Ema T. Crooks, James M. Binley, Rogier W. Sanders, Ineke Braakman
Summary: The signal peptide of HIV-1 gp120 has additional functions beyond targeting, including enhancing folding accuracy, delaying folding, and ensuring quality control, which are important for viral fitness. These regulatory roles of signal peptides are likely common in secretory-protein biogenesis.
Review
Immunology
Shahnawaz D. Jadeja, Jay M. Mayatra, Jayvadan Vaishnav, Nirali Shukla, Rasheedunnisa Begum
Summary: Vitiligo is a skin disorder characterized by depigmented macules on the skin, resulting from autoimmune destruction of melanocytes. Oxidative stress and autoimmunity play crucial roles in the onset and progression of the disease, and endoplasmic reticulum stress may serve as a connecting link between them.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Multidisciplinary Sciences
Rasia C. Li, Madeline Y. Wong, Andrew S. DiChiara, Azade S. Hosseini, Matthew D. Shoulders
Summary: The N-glycan in the C-Pro domain of procollagen plays an essential role in promoting folding and secretion, particularly under proteostatic challenge, by providing access to the ER's lectin-based chaperone machinery. This context-dependent function of the N-glycan buffers against misfolding and helps maintain proteostasis during collagen production processes such as development and wound healing.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Biochemistry & Molecular Biology
Karol Fiedorczuk, Jue Chen
Summary: Small molecule chaperones have been widely used as therapeutics for diseases caused by protein misfolding. CFTR correctors are the most successful examples, as they can revert folding defects and are used to treat cystic fibrosis. Cryo-electron microscopy structures reveal that these correctors stabilize TMD1 of CFTR, preventing premature degradation and rescuing disease-causing mutations.
Review
Neurosciences
Savannah G. Sims, Rylee N. Cisney, Marissa M. Lipscomb, Gordon P. Meares
Summary: Astrocytes play a crucial role in supporting neurological function and their dysregulation can contribute to neurological decline in diseases. ER stress, caused by the accumulation of misfolded proteins, is a common feature in neurological diseases and can trigger the unfolded protein response, leading to various cellular responses including apoptosis. Recent research has shown that activated UPR signaling in astrocytes may drive them towards a maladaptive phenotype, affecting their inflammatory response, trophic support, and ability to transmit ER stress to other cells.
Review
Biochemistry & Molecular Biology
Sanaz Dastghaib, P. Sravan Kumar, Sajjad Aftabi, Gautam Damera, Azadeh Dalvand, Adel Sepanjnia, Mohammad Kiumarsi, Mohamad-Reza Aghanoori, Sukhwinder Singh Sohal, Sudharsana R. Ande, Javad Alizadeh, Pooneh Mokarram, Saeid Ghavami, Pawan Sharma, Amir A. Zeki
Summary: Lung cells are exposed to internal and external stressors, leading to disruption of protein homeostasis and activation of the UPR. Dysregulation of the UPR is associated with disease development and various human conditions. Compounds targeting the UPR pathway show potential for future therapeutic interventions.
AMERICAN JOURNAL OF RESPIRATORY CELL AND MOLECULAR BIOLOGY
(2021)
Review
Biochemistry & Molecular Biology
Garrett Dalton Smedley, Keenan E. Walker, Shauna H. Yuan
Summary: Neurodegenerative diseases are a growing concern for the aging population, and errors within the PERK pathway have been linked to a variety of pathologies. However, conflicting narratives exist due to the wide array of methodological approaches in genetic and clinical studies. As PERK is connected to pathology, it has become a valuable target for research in understanding and potentially treating neurodegenerative diseases.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Multidisciplinary Sciences
Yi Sun, Zujie Yao, Yiting Ye, Jun Fang, Honglin Chen, Yuping Lyu, William Broad, Marjorie Fournier, Genyun Chen, Yonghong Hu, Shabaz Mohammed, Qihua Ling, R. Paul Jarvis
Summary: This study demonstrates the role of the nucleocytosolic ubiquitin-proteasome system (UPS) in regulating photosynthesis within endosymbiotically derived chloroplasts, through protein degradation.
Article
Biochemistry & Molecular Biology
Farkas Sarnyai, Anna Somogyi, Zsofia Gor-Nagy, Veronika Zambo, Peter Szelenyi, Judit Matyasi, Laura Simon-Szabo, Eva Kereszturi, Blanka Toth, Miklos Csala
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Article
Engineering, Chemical
Anna Somogyi, Maria Berinkeine Donko, Farkas Sarnyai, Gergely Becskereki, Miklos Csala, Blanka Toth
PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING
(2020)
Article
Engineering, Chemical
Anna Somogyi, Judit Matyasi, Zsofia Gor-Nagy, Farkas Sarnyai, Miklos Csala, Blanka Toth
Summary: The study presents a simple and reliable method for the quantification of a group of relevant fatty acids using gas chromatography and flame ionization detection. The method showed good linear calibration and high recovery rates for different types of samples, making it suitable for studying the metabolism of dietary trans fatty acids (TFAs).
PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Kinga Tibori, Gabriella Orosz, Veronika Zambo, Peter Szelenyi, Farkas Sarnyai, Viola Tamasi, Zsolt Ronai, Judit Matyasi, Blanka Toth, Miklos Csala, Eva Kereszturi
Summary: Disturbances in lipid metabolism caused by excessive food intake and a sedentary lifestyle are major risks for metabolic disorders. The enzyme SCD1 plays an important role in these diseases by catalyzing the synthesis of unsaturated fatty acids. Studies have shown that increased activity or over-expression of SCD1 is a contributing factor for type 2 diabetes mellitus. This research investigated the impact of a common genetic variant on SCD1 function and found that the variant could contribute to the development of obesity-related metabolic disorders, including type 2 diabetes mellitus, by increasing intracellular levels of SCD1.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Medicinal
Tamas Czuczi, Jozsef Muranyi, Peter Barany, Istvan Mora, Adina Borbely, Miklos Csala, Antal Csampai
Summary: Imipridones, including ONC201, ONC206 and ONC212, are a novel class of anticancer agents that have shown promising results in clinical trials. In order to enhance the ROS responsivity of these compounds, researchers have designed and synthesized a series of ferrocene-imipridone hybrids. These hybrids exhibited significantly lower cell viability in malignant cell lines compared to ONC201, and two of them were able to overcome resistance and induce apoptosis/necrosis in cells.
Article
Biochemistry & Molecular Biology
Farkas Sarnyai, Eva Kereszturi, Kitti Szirmai, Judit Matyasi, Johanna Iman Al-Hag, Tamas Csizmadia, Peter Low, Peter Szelenyi, Viola Tamasi, Kinga Tibori, Veronika Zambo, Blanka Toth, Miklos Csala
Summary: Trans fatty acids (TFAs), ingested in substantial amounts, are believed to be unhealthy and contribute to obesity, cardiovascular diseases, and diabetes. This study used a hepatoma model to compare the metabolism and effects of industrial and ruminant TFAs with that of cis-oleate. The results show that TFAs are less protective against palmitate toxicity compared to oleate, which may be due to their diverse incorporation into accumulating diacylglycerols and ceramides. These findings provide evidence against dietary trans fat intake and help us better understand the molecular mechanisms of lipotoxicity.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Genetics & Heredity
Veronika Zambo, Gabriella Orosz, Luca Szabo, Kinga Tibori, Szabolcs Sipeki, Krisztina Molnar, Miklos Csala, Eva Kereszturi
Summary: The combined prevalence of type 1 and type 2 diabetes is increasing worldwide. This study investigated the role of the SCD5 promoter and its polymorphisms in diabetes development. The rs3811792 SNP in the SCD5 promoter region was found to reduce promoter activity and was associated with both type 1 and type 2 diabetes.
Article
Biochemistry & Molecular Biology
Bianka Gurbi, Diana Brauswetter, Kinga Penzes, Attila Varga, Tibor Krenacs, Kornel Danos, Ede Birtalan, Laszlo Tamas, Miklos Csala
Summary: The poor prognosis of head-and-neck squamous cell carcinoma (HNSCC) is due to the lack of prognostic and predictive markers. The Ras/Raf/MEK/ERK signaling pathway is activated by overexpressed epidermal growth factor receptor (EGFR) and promotes the progression of HNSCCs. Our study investigated the effects of EGFR and MEK inhibitors on HNSCC-cell lines and found variations in sensitivity among different cell lines. The feedback activation of Akt through EGFR played a role in FaDu cells, while the insensitivity of Detroit 562 cells might be due to a PIK3CA mutation. The versatility of EGFR-initiated signaling pathways in HNSCC cell lines justifies the combined application of EGFR and MEK inhibitors.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Cell Biology
Attila Varga, Minh Tu Nguyen, Kinga Penzes, Bence Batai, Pal Gyulavari, Bianka Gurbi, Jozsef Muranyi, Peter Csermely, Miklos Csala, Tibor Vantus, Csaba Soti
Summary: Prostate cancer metastasis is a major cause of male mortality. Hsp90 promotes cancer cell migration by ensuring the conformational stability and function of PKD3, revealing a potential mechanism of Hsp90 in prostate cancer metastasis.
Article
Biochemistry & Molecular Biology
Jozsef Muranyi, Cintia Duro, Bianka Gurbi, Istvan Mora, Attila Varga, Krisztina Nemeth, Jozsef Simon, Miklos Csala, Antal Csampai
Summary: We synthesized novel erlotinib-chalcone molecular hybrids and evaluated their anticancer activity on HNSCC cell lines. The hybrids showed higher efficacy compared to the 1:1 combination of erlotinib and a reference chalcone. They eradicated HNSCC cells in low micromolar concentrations and their mechanism of action was independent of canonical targets. The therapeutic potential of these hybrid molecules validates their development and further investigation is justified to reveal the underlying mechanism.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Gabriella Orosz, Luca Szabo, Szanna Bereti, Veronika Zambo, Miklos Csala, Eva Kereszturi
Summary: Alternative splicing is an important post-transcriptional control mechanism that provides protein isoform diversity. Changes in the expression and splicing of SCD5 have significant value for cancer diagnosis, prognosis, and treatment. The study explores the distribution of SCD5 transcript variants in human tissues, the functionality of relevant splice sites, and the influence of single-nucleotide variations. An imbalance in SCD5 isoforms is attributed to weaker recognition of the splicing acceptor site, and natural variations at splice sites can modify the dominance of certain isoforms. These findings provide valuable data on SCD5 in human tissues and reveal mutation-driven changes in alternative splicing, which may impact tumor-associated lipid metabolism and have prognostic implications for novel therapeutic approaches.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Biology
Viola Tamasi, Krisztina Nemeth, Miklos Csala
Summary: Extracellular vesicles (EVs) are cell-derived membrane structures that can transport complex cargos to other cells and provide communication and intercellular regulation. EVs in the liver play important roles in homeostatic processes and exhibit characteristic changes in various liver diseases. Understanding these modified EV-related processes is crucial for their potential use as biomarkers or therapeutic targets.
Meeting Abstract
Biochemistry & Molecular Biology
V. Zambo, L. Szabo, G. Orosz, M. Csala, E. Kereszturi
Meeting Abstract
Biochemistry & Molecular Biology
V. Zambo, L. Szabo, M. Csala, E. Kereszturi
Meeting Abstract
Biochemistry & Molecular Biology
F. Sarnyai, A. Somogyi, V. Zambo, L. Simon-Szabo, P. Szelenyi, E. Kereszturi, B. Toth, M. Csala