Candida albicans-stimulated hematopoietic stem and progenitor cells generate trained neutrophils with enhanced mitochondrial ROS production that defend against infection

Sobén, M., Guerrero, P., Guiu, A., Yáñez, A. Gil, M.L.

PLOS Pathogens.

In press

Categoría: “Microbiology”, Posición: 24/161 (Q1), F.I.: 5.5 (2023)

Metabolic engineering of the serine/glycine network as a means to improve the nitrogen content of crops.

Casatejada-Anchel, R., Torres-Moncho, A., Anoman, A.D., Budhagatapalli, N., Pérez-Lorences, E., Alcántara-Enguídanos, A., Rosa-Téllez, S., Perez de Souza, L., Kumlehn, J., Fernie, A.R., Muñoz-Bertomeu, J., Ros, R.

Plant Biotecnology Journal.

23(1): 268-280

Nonhematopoietic Stem Cell Identification and Sorting in Adult Retina

Flores, A. Fernández-Sánchez, L., Kutsyr, O., Yáñez, A., Gil, M.L., Gozalbo, D., Maneu, V., and Lax, P.

Neural Stem Cells.

Methods in Molecular Biology, vol 2899:59-65. Humana, New York

Erratum: Immortalized human myotonic dystrophy type 1 muscle cell lines to address patient heterogeneity

Núñez-Manchón J, Capó J, Martínez-Piñeiro A, Juanola E, Pesovic J, Mosqueira-Martín L, González-Imaz K, Maestre-Mora P, Odria R, Cerro-Herreros E, Naldaiz-Gastesi N, López de Munain A, Artero R, Savic-Pavicevic D, Vallejo-Illarramendi A, Mamchaoui K, Bigot A, Mouly V, Suelves M, Nogales-Gadea G - 2024 - iScience

[This corrects the article DOI: 10.1016/j.isci.2024.109930.].

A Novel Class of FKBP12 Ligands Rescues Premature Aging Phenotypes Associated with Myotonic Dystrophy Type 1

García-Puga M, Gerenu G, Bargiela A, Espinosa-Espinosa J, Mosqueira-Martín L, Sagartzazu-Aizpurua M, Aizpurua JM, Vallejo-Illarramendi A, Artero R, López de Munain A, Matheu A - 2024 - Cells

Background: Myotonic dystrophy type 1 (DM1) is an autosomal dominant disorder clinically characterized by progressive muscular weakness and multisystem degeneration, which correlates with the size of CTG expansion and MBLN decrease. These changes induce a calcium and redox homeostasis imbalance in several models that recapitulate the features of premature tissue aging. In this study, we characterized the impact of a new family of FKBP12 ligands (generically named MPs or MP compounds) designed to stabilize FKBP12 binding to the ryanodine receptors and normalize calcium dysregulation under oxidative stress. Methods: Human primary fibroblasts from DM1 patients and control donors, treated with...

Background: Myotonic dystrophy type 1 (DM1) is an autosomal dominant disorder clinically characterized by progressive muscular weakness and multisystem degeneration, which correlates with the size of CTG expansion and MBLN decrease. These changes induce a calcium and redox homeostasis imbalance in several models that recapitulate the features of premature tissue aging. In this study, we characterized the impact of a new family of FKBP12 ligands (generically named MPs or MP compounds) designed to stabilize FKBP12 binding to the ryanodine receptors and normalize calcium dysregulation under oxidative stress. Methods: Human primary fibroblasts from DM1 patients and control donors, treated with MP compounds or not, were used for functional studies of cell viability, proliferation, and metabolism. The gene expression profile in treated cells was determined using RNA sequencing. The impact of MP compounds in vivo was evaluated in a Drosophila model of the disease using locomotor activity and longevity studies. Results: The treatment with different MP compounds reversed oxidative stress and impaired cell viability and proliferation, mitochondrial activity, and metabolic defects in DM1-derived primary fibroblasts. RNA sequencing analysis confirmed the restoration of molecular pathways related to calcium and redox homeostasis and additional pathways, including the cell cycle and metabolism. This analysis also revealed the rescue of alternative splicing events in DM1 fibroblasts treated with MP compounds. Importantly, treatment with MP compounds significantly extended the lifespan and improved the locomotor activity of a Drosophila model of the DM1 disease, and restored molecular defects characteristic of the disease in vivo. Conclusions: Our results revealed that MP compounds rescue multiple premature aging phenotypes described in DM1 models and decipher the benefits of this new family of compounds in the pre-clinical setting of DM1. Keywords: FKBP12/RyR interaction; extended longevity; multisystem recovery; myotonic dystrophy; oxidative stress.

Decoding Nucleotide Repeat Expansion Diseases: Novel Insights from Drosophila melanogaster Studies.

Atienzar-Aroca S, Kat M, López-Castel A - 2024 - Int J Mol Sci

Drosophila melanogaster usage has provided substantial insights into the pathogenesis of several nucleotide repeat expansion diseases (NREDs), a group of genetic diseases characterized by the abnormal expansion of DNA repeats. Leveraging the genetic simplicity and manipulability of Drosophila, researchers have successfully modeled close to 15 NREDs such as Huntington's disease (HD), several spinocerebellar ataxias (SCA), and myotonic dystrophies type 1 and 2 (DM1/DM2). These models have been instrumental in characterizing the principal associated molecular mechanisms: protein aggregation, RNA toxicity, and protein function loss, thus recapitulating key features of human disease. Used in...

Drosophila melanogaster usage has provided substantial insights into the pathogenesis of several nucleotide repeat expansion diseases (NREDs), a group of genetic diseases characterized by the abnormal expansion of DNA repeats. Leveraging the genetic simplicity and manipulability of Drosophila, researchers have successfully modeled close to 15 NREDs such as Huntington's disease (HD), several spinocerebellar ataxias (SCA), and myotonic dystrophies type 1 and 2 (DM1/DM2). These models have been instrumental in characterizing the principal associated molecular mechanisms: protein aggregation, RNA toxicity, and protein function loss, thus recapitulating key features of human disease. Used in chemical and genetic screenings, they also enable us to identify promising small molecules and genetic modifiers that mitigate the toxic effects of expanded repeats. This review summarizes the close to 150 studies performed in this area during the last seven years. The relevant highlights are the achievement of the first fly-based models for some NREDs, the incorporation of new technologies such as CRISPR for developing or evaluating transgenic flies containing repeat expanded motifs, and the evaluation of less understood toxic mechanisms in NREDs such as RAN translation. Overall, Drosophila melanogaster remains a powerful platform for research in NREDs. Keywords: Drosophila melanogaster; high-throughput screening; protein aggregation; protein loss-of-function; rare disease; repeat expansion; toxic RNA.

AntimiR treatment corrects myotonic dystrophy primary cell defects across several CTG repeat expansions with a dual mechanism of action

Cerro-Herreros E, Núñez-Manchón J, Naldaiz-Gastesi N, Carrascosa-Sàez M, García-Rey A, Losilla DP, González-Martínez I, Espinosa-Espinosa J, Moreno K, Poyatos-García J, Vilchez JJ, de Munain AL, Suelves M, Nogales-Gadea G, Llamusí B, Artero R - 2024 - Sci Adv

This study evaluated therapeutic antimiRs in primary myoblasts from patients with myotonic dystrophy type 1 (DM1). DM1 results from unstable CTG repeat expansions in the DMPK gene, leading to variable clinical manifestations by depleting muscleblind-like splicing regulator protein MBNL1. AntimiRs targeting natural repressors miR-23b and miR-218 boost MBNL1 expression but must be optimized for a better pharmacological profile in humans. In untreated cells, miR-23b and miR-218 were up-regulated, which correlated with CTG repeat size, supporting that active MBNL1 protein repression synergizes with the sequestration by CUG expansions in DMPK. AntimiR treatment improved RNA toxicity readouts and...

This study evaluated therapeutic antimiRs in primary myoblasts from patients with myotonic dystrophy type 1 (DM1). DM1 results from unstable CTG repeat expansions in the DMPK gene, leading to variable clinical manifestations by depleting muscleblind-like splicing regulator protein MBNL1. AntimiRs targeting natural repressors miR-23b and miR-218 boost MBNL1 expression but must be optimized for a better pharmacological profile in humans. In untreated cells, miR-23b and miR-218 were up-regulated, which correlated with CTG repeat size, supporting that active MBNL1 protein repression synergizes with the sequestration by CUG expansions in DMPK. AntimiR treatment improved RNA toxicity readouts and corrected regulated exon inclusions and myoblast defects such as fusion index and myotube area across CTG expansions. Unexpectedly, the treatment also reduced DMPK transcripts and ribonuclear foci. A leading antimiR reversed 68% of dysregulated genes. This study highlights the potential of antimiRs to treat various DM1 forms across a range of repeat sizes and genetic backgrounds by mitigating MBNL1 sequestration and enhancing protein synthesis.

Msi2 enhances muscle dysfunction in a myotonic dystrophy type 1 mouse model

Sabater-Arcis M, Moreno N, Sevilla T, Perez Alonso M, Bargiela A, Artero R - 2024 - Biomed J

Background: Myotonic dystrophy type 1 (DM1) is a rare neuromuscular disease caused by a CTG repeat expansion in the 3' untranslated region of the DM1 protein kinase gene. Characteristic degenerative muscle symptoms include myotonia, atrophy, and weakness. We previously proposed an Musashi homolog 2 (MSI2)>miR-7>autophagy axis whereby MSI2 overexpression repressed miR-7 biogenesis that subsequently de-repressed muscle catabolism through excessive autophagy. Because the DM1 HSALR mouse model expressing expanded CUG repeats shows weak muscle-wasting phenotypes, we hypothesized that MSI2 overexpression was sufficient to promote muscle dysfunction in vivo. Methods: By means of recombinant AAV...

Background: Myotonic dystrophy type 1 (DM1) is a rare neuromuscular disease caused by a CTG repeat expansion in the 3' untranslated region of the DM1 protein kinase gene. Characteristic degenerative muscle symptoms include myotonia, atrophy, and weakness. We previously proposed an Musashi homolog 2 (MSI2)>miR-7>autophagy axis whereby MSI2 overexpression repressed miR-7 biogenesis that subsequently de-repressed muscle catabolism through excessive autophagy. Because the DM1 HSALR mouse model expressing expanded CUG repeats shows weak muscle-wasting phenotypes, we hypothesized that MSI2 overexpression was sufficient to promote muscle dysfunction in vivo. Methods: By means of recombinant AAV murine MSI2 was overexpressed in neonates HSALR mice skeletal muscle to induce DM1-like phenotypes. Results: Sustained overexpression of the murine MSI2 protein in HSALR neonates induced autophagic flux and expression of critical autophagy proteins, increased central nuclei and reduced myofibers area, and weakened muscle strength. Importantly, these changes were independent of MBNL1, MBNL2, and Celf1 protein levels, which remained unchanged upon Msi2 overexpression. Conclusions: Globally, molecular, histological, and functional data from these experiments in the HSALR mouse model confirms the pathological role of MSI2 expression levels as an atrophy-associated component that impacts the characteristic muscle dysfunction symptoms in DM1 patients. Keywords: Adeno-associated virus; HSA(LR); Msi2; Muscle atrophy; Myotonic dystrophy. © 2023 The Authors. Published by Elsevier B.V. on behalf of Chang Gung University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

GM-CSF receptor expression determines opposing innate memory phenotypes at different stages of myelopoiesis

Guerrero, P., Bono, C., Sobén, M., Guiu, A., Cheng, Q.J., Gil, M.L., Yáñez, A

Blood.

143(26):2763-2777

Categoría: “Hematology”, Posición: 2/97 (D1, Q1), F.I.: 21 (2023)