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Sperm function, mitochondrial activity and in vivo fertility are associated to their mitochondrial DNA content in pigs

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1550-1558页

作者： Marc Llavanera Yentel Mateo‑Otero Estel Vinolas‑Vergés sergi Bonet Marc Yeste Unit of Cell Biology Department of BiologyFaculty of SciencesUniversity of GironaGirona ES‑17003Spain Biotechnology of Animal and Human Reproduction(TechnoSperm) Institute of Food and Agricultural TechnologyUniversity of GironaGirona ES‑17003Spain Catalan Institution for Research and Advanced Studies(ICREA) Barcelona ES‑08010Spain

Background Despite their low abundance in sperm, mitochondria have diverse functions in this cell type, includ-ing energy production, signalling and calcium regulation. In humans, sperm mitochondrial DNA content(mtDNAc) has been reported to be negatively linked to sperm function and fertility. Yet, the association between mtDNAc and sperm function in livestock remains unexplored. for this reason, this study aimed to shed some light on the link between mtDNAc and sperm function and fertilising potential in pigs. A qPCR method for mtDNAc quantification was optimised for pig sperm, and the association of this parameter with sperm motility, kinematics, mitochondrial activity, and fertility was subsequently *** first, the q PCR method was found to be sensitive and efficient for mtDNAc quantification in pig sperm. By using this technique, mtDNAc was observed to be associated to sperm motility, mitochondrial activity and in vivo, but not in vitro, fertility outcomes. Specifically, sperm with low mtDNAc were seen to exhibit greater motility but decreased mitochondrial activity and intracellular reactive oxygen species. Interestingly, samples with lower mtD-NAc showed higher conception and farrowing rates, but similar in vitro fertilisation rates and embryo development, when compared to those with greater *** These findings enrich our comprehension of the association of mtDNAc with sperm biology, and lay the foundation for future research into employing this parameter as a molecular predictor for sperm function and fer-tility in livestock.

关键词： fertility Mitochondria Motility mtDNA copy number qPCR Sperm

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家庭医学与社区卫生案例研究的基础

中国全科医学 2019年第26期22卷 3139-3144,3153页

作者： sergi fàbregues Michael D fetters() 赵新月汪洋(译) 韩建军许岩丽杨辉(审校) Department of Psychology and Education Universitat Oberta de CatalunyaBarcelona 08018Spain Department of family Medicine University of MichiganAnn ArborMichigan 48109USA 中国全科医学杂志社北京市100053 Monash University Melbourne 3168Australia

本文的目的是向家庭医学研究者介绍案例研究,是一种在社会和健康科学中常用的严谨研究方法,与临床病例报告相差较大。本文首先概述了社会和健康科学中的案例研究,包括其定义、潜在应用、历史背景和核心特征。然后通过一个教学计划的案... 详细信息

本文的目的是向家庭医学研究者介绍案例研究,是一种在社会和健康科学中常用的严谨研究方法,与临床病例报告相差较大。本文首先概述了社会和健康科学中的案例研究,包括其定义、潜在应用、历史背景和核心特征。然后通过一个教学计划的案例研究,介绍实施案例研究项目过程的10个步骤,该教学计划旨在教授国际家庭医学住院学习者敏感检查的技能。进行案例研究的步骤包括:进行文献综述、制定研究问题、确保案例研究合适、确定案例研究设计的类型、界定案例的界限并选择案例、准备数据收集、收集和组织数据、分析数据、撰写案例研究报告、评估质量。案例研究是一种高度灵活和强大的研究工具,对家庭医学研究者来说应用广泛。

关键词：家庭医学全科医学案例研究社区参与研究卫生服务研究研究方法基层卫生保健

Chromatin condensation but not DNA integrity of pig sperm is greater in the sperm-rich fraction

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Journal of Animal Science and Biotechnology 2024年第1期15卷 171-181页

作者： Estel Viñolas-Vergés Jordi Ribas-Maynou Isabel Barranco Camila Peres Rubio sergi Bonet Jordi Roca Marc Yeste Unit of Cell Biology Department of BiologyFaculty of SciencesUniversity of GironaGironaSpain Biotechnology of Animal and Human Reproduction(TechnoSperm) Institute of Food and Agricultural TechnologyUniversity of GironaGironaSpain Department of Medicine and Animal Surgery Faculty of Veterinary ScienceUniversity of MurciaMurciaSpain Catalan Institution for Research and Advanced Studies(ICREA) S08010 BarcelonaSpain

Background Protamination and condensation of sperm chromatin as well as DNA integrity play an essential role during fertilization and embryo *** some mammals,like pigs,ejaculates are emitted in three separate fractions:pre-sperm,sperm-rich(SRf)and post sperm-rich(PSRf).These fractions are known to vary in volume,sperm concentration and quality,as well as in the origin and composition of seminal plasma(SP),with differences being also observed within the SRf ***,whether disparities in the DNA integrity and chromatin condensation and pro-tamination of their sperm exist has not been *** This study determined chromatin protamination(Chromomycin A3 test,CMA_(3)),condensation(Dibromobi-mane test,DBB),and DNA integrity(Comet assay)in the pig sperm contained in the first 10 m L of the SRf(SRf-P1),the remaining portion of the sperm-rich fraction(SRf-P2),and the post sperm-rich fraction(PSRf).While chromatin protamination was found to be similar between the different ejaculate fractions(P>0.05),chromatin condensation was seen to be greater in SRf-P1 and SRf-P2 than in the PSRf(P=0.018 and P=0.004,respectively).Regarding DNA integrity,no differences between fractions were observed(P>0.05).As the SRf-P1 has the highest sperm concentra-tion and ejaculate fractions are known to differ in antioxidant composition,the oxidative stress index(OSi)in SP,calcu-lated as total oxidant activity divided by total antioxidant capacity,was tested and confirmed to be higher in the SRf-P1 than in SRf-P2 and PSRf(0.42±0.06 vs.0.23±0.09 and 0.08±0.00,respectively;Pf each fraction(Rs=0.973;Pfound to differ between ejaculate fractions,SRf-P1 and SRf-P2 were observed to exhibit greater chromatin condensation than the *** could be related to the OSi of each fraction.

关键词： Chromatin Condensation DNA integrity Ejaculate fractions Pig Protamination Sperm

Amyloid-beta pathology-induced nanoscale synaptic disruption:the case of the GABA_B-GIRK assembly

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Neural Regeneration Research 2025年第5期20卷 1409-1410页

作者： Rafael Lujan Alejandro Martín-Belmonte sergi ferré francisco Ciruela Synaptic Structure Laboratory Instituto de Biomedicina de la UCLM(IB-UCLM)Departamento de Ciencias MédicasInstituto de Investigación en Salud de Castilla-La Mancha(IDISCAM)Facultad de MedicinaUniversidad Castilla-La ManchaCampus BiosanitarioC/AlmansaAlbaceteSpain Integrative Neurobiology Section National Institute on Drug AbuseIntramural Research ProgramNational Institutes of HealthBaltimoreMDUSA Pharmacology Unit Department of Pathology and Experimental TherapeuticsSchool of Medicine and Health SciencesInstitute of NeurosciencesUniversity of BarcelonaNeuropharmacology&Pain GroupNeuroscience ProgramBellvitge Institute for Biomedical ResearchL’Hospitalet de LlobregatSpain

Alzheimer's disease (AD) is characterized by an imbalance between excitatory and inhibitory brain networks,leading to aberrant homeostatic synaptic *** has progressively been recognized as syna ptopathy and syna ptic dysfunction has been identified as a key component of its pathogenesis (Schirinzi et al.,2020).Syna ptic dysfunction is believed to precede synapse loss,a primary biological correlate of cognitive decline in AD,inevita bly associated with neuronal death.

关键词： Alzheimer pathology

Clues from a missense mutation of the adenosine A1 receptor gene associated with early-onset Parkinson’s disease

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Neural Regeneration Research 2023年第10期18卷 2204-2205页

作者： sergi ferré Leonardo Pardo francisco Ciruela Integrative Neurobiology Section National Institute on Drug AbuseIntramural Research ProgramNational Institutes of HealthBaltimoreMDUSA Laboratory of Computational Medicine Biostatistics UnitFaculty of MedicineUniversitat Autònoma BarcelonaBellaterraBarcelonaSpain Pharmacology Unit Department of Pathology and Experimental TherapeuticsSchool of Medicine and Health SciencesInstitute of NeurosciencesUniversity of Barcelona.Neuropharmacology&Pain GroupNeuroscience ProgramBellvitge Institute for Biomedical ResearchL’Hospitalet de LlobregatSpain

Parkinson’s disease (P D) is a com plex neu rodegenerative disorder for which ra re and common genetic variants contribute to disease risk,onset,and *** genetic contribution to PD can be classified mainly in,first,rare DNA variants that are highly penetrant and therefore causal,which are typically associated with monogenic PD;and second,more common risk polymorphic variants,which individually exert a small increase in the risk of the disease,which are usually identified in the most prevalent and apparently sporadic PD (Blauwendraat et al.,2020).

关键词： typically degenerative

Remodeling the tumor microenvironment to overcome treatment resistance in HPV-negative head and neck cancer

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Cancer Drug Resistance 2023年第2期6卷 291-313页

作者： sergi Benavente Department of Radiation Oncology Vall d’Hebron University Hospital CampusBarcelona 08035Spain

Despite intensive efforts and refined techniques,overall survival in HPV-negative head and neck cancer remains *** immune priming is required to elicit a strong and durable antitumor immune response in immunologically cold and excluded tumors like HPV-negative head and neck *** review highlights how the tumor microenvironment could be affected by different immune and stromal cell types,weighs the need to integrate metabolic regulation of the tumor microenvironment into cancer treatment strategies and summarizes the emerging clinical applicability of personalized immunotherapeutic strategies in HPV-negative head and neck cancer.

关键词： Tumor microenvironments head and neck cancer SBRT immunotherapy metabolic reprogramming radiotherapy HPV-negative

cell2mol:encoding chemistry to interpret crystallographic data

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npj Computational Materials 2022年第1期8卷 1787-1794页

作者： sergi Vela Ruben Laplaza Yuri Cho Clémence Corminboeuf Laboratory for Computational Molecular Design(LCMD) Institute of Chemical Sciences and Engineering(ISIC)École Polytechnique Fédérale de Lausanne(EPFL)CH-1015LausanneSwitzerland National Centre for Computational Design and Discovery of Novel Materials(NCCR MARVEL) Ecole Polytechnique Fédérale de Lausanne1015LausanneSwitzerland National Centre for Competence in Research“Sustainable chemical processes through catalysis(NCCR Catalysis)” École Polytechnique Fédérale de Lausanne1015LausanneSwitzerland

The creation and maintenance of crystallographic data repositories is one of the greatest data-related achievements in *** such as the Cambridge Structural Database host what is likely the most diverse collection of synthesizable *** properly mined,they could be the basis for the large-scale exploration of new regions of the chemical space using quantum chemistry(QC).Yet,it is currently challenging to retrieve all the necessary information for QC codes based exclusively on the available structural data,especially for transition metal *** overcome this limitation,we present cell2mol,a software that interprets crystallographic data and retrieves the connectivity and total charge of molecules,including the oxidation state(OS)of metal *** demonstrate that cell2mol outperforms other popular methods at assigning the metal OS,while offering a comprehensive interpretation of the unit *** code is made available,as well as reliable QC-ready databases totaling 31k transition metal complexes and 13k ligands that contain incomparable chemical diversity.

关键词： offering overcome properly

Vitamin D supplementation for autoimmune hepatitis: A need for further investigation

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World Journal of Hepatology 2022年第1期14卷 295-299页

作者： Consolato M sergi Anatomic Pathology Division Children’s Hospital of Eastern Ontario(CHEO)University of OttawaOttawa K1H 8L1ONCanada

Autoimmune hepatitis is a chronic liver disease harboring an autoimmune basis and progressive *** still obscurity in etiology and pathogenesis,some evidence supports the importance of sustaining the immune *** D is a lipo-soluble vitamin,which has been identified as decreased in our *** is often due to the daily habit change and decrease of individual sun exposure due to the increase of the ultraviolet-induced potential melanocytic ***,we emphasize the importance of vitamin D supplementation in patients affected with liver disease.

关键词： Vitamin D Autoimmune hepatitis Supplementation Immunostimulants Liver

Chromatin condensation but not DNA integrity of pig sperm is greater in the sperm-rich fraction

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