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  1. Article ; Online: Sofia Quintero Romero: Protection and Support of Breastfeeding With a Feminist and Social Justice Lens.

    Quintero Romero, Sofia / Arendt, Maryse

    Journal of human lactation : official journal of International Lactation Consultant Association

    2023  Volume 39, Issue 4, Page(s) 573–578

    Abstract: Sofia Quintero Romero graduated as a medical doctor at Universidad del Rosario, Bogotà, Colombia, in 1977. She spent a compulsory rural year working in a remote indigenous community in the Sierra Nevada de Santa Marta in Columbia. In 1979 she worked in ... ...

    Abstract Sofia Quintero Romero graduated as a medical doctor at Universidad del Rosario, Bogotà, Colombia, in 1977. She spent a compulsory rural year working in a remote indigenous community in the Sierra Nevada de Santa Marta in Columbia. In 1979 she worked in Bolivia for Terre des Hommes and Oxfam, evaluating their health projects with the Aymara Indians and in the tin mines. She had to leave Colombia for political reasons and went to England, where she obtained, in 1981, an MSc in Community Health at the London School of Hygiene & Tropical Medicine (LSHTM). That's where she met her husband, Adriano Cattaneo. She then worked in Mozambique and Nicaragua where she was in charge of maternal and child health services at the regional level. Since 1990, she devoted her time to the protection, promotion, and support of breastfeeding. Sofia obtained a PhD in Maternal and Child Health at the University of Bologna, Italy, and a Diploma in Breastfeeding Theory and Practice at the Child Health Institute in London UK. She taught hundreds of breastfeeding courses for health professionals and peer counsellors in Italy and in dozens of countries abroad, using the World Health Organization/United Nations Children's Fund (WHO/UNICEF) manuals. In the past 15 years, she changed her approach for breastfeeding education to biological nurturing. Sofia has been a member of the International Baby Food Action Network (IBFAN) since 1992 and coordinated the Nestlé Boycott in Italy. She retired in 2018.
    MeSH term(s) Female ; Child ; Humans ; Breast Feeding ; Health Promotion ; United Nations ; World Health Organization ; Feminism
    Language English
    Publishing date 2023-08-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1138470-0
    ISSN 1552-5732 ; 0890-3344
    ISSN (online) 1552-5732
    ISSN 0890-3344
    DOI 10.1177/08903344231193723
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Treatment of Sleep, Motor and Sensory Symptoms with the Orexin Antagonist Suvorexant in Adults with Idiopathic Restless Legs Syndrome: A Randomized Double-Blind Crossover Proof-of-Concept Study.

    Garcia-Borreguero, Diego / Aragón, Alba Garcia / Moncada, Brian / Romero, Sofia / Granizo, Juan José / Quintas, Sonia / Castillo, María

    CNS drugs

    2024  Volume 38, Issue 1, Page(s) 45–54

    Abstract: Background and objectives: Current treatment guidelines for restless legs syndrome (RLS) recommend treatment be initiated with non-dopaminergic drugs. Given the potential role of orexins in the pathophysiology of RLS, we performed a pilot, proof-of- ... ...

    Abstract Background and objectives: Current treatment guidelines for restless legs syndrome (RLS) recommend treatment be initiated with non-dopaminergic drugs. Given the potential role of orexins in the pathophysiology of RLS, we performed a pilot, proof-of-concept study to investigate the therapeutic effects of suvorexant, a dual orexin receptor antagonist (DORA), on sleep and sensory/motor symptoms in individuals with idiopathic RLS.
    Methods: This was a randomized, double-blind, crossover and placebo-controlled study. Inclusion criteria were diagnosis with idiopathic RLS, an International RLS Study Group Severity Rating Scale (IRLS) score > 15, and the absence of significant RLS symptoms before 9 pm. Following washout from any previous central nervous system (CNS)-active drugs, patients were randomized to receive either suvorexant or placebo for two consecutive 2-week treatment periods. Treatment was administered at 9 pm at a fixed dose of 10 mg/day during the first week, and 20 mg during the second week. Primary and coprimary endpoints were wake after sleep onset (WASO) and total sleep time (TST), respectively, while IRLS rating scale score, multiple suggested immobilization tests (m-SIT), and periodic limb movements (PLMs) were secondary endpoints. RLS severity was measured weekly using the IRLS and Clinical Global Improvement (CGI) scales. m-SIT were also performed between 8 pm and midnight at the end of each treatment phase and were followed by a sleep study.
    Results: A total of 41 participants were randomized, 40 of whom completed the study. Compared with placebo, treatment with suvorexant significantly improved RLS symptoms (according to IRLS total score, CGI, and the m-SIT), PLM during sleep, and PLM with arousal. Improvement of RLS symptoms was greater in those who had not been exposed to dopaminergic agents in the past. Sleep architecture also improved with significant changes in TST, WASO, sleep onset latency, sleep efficiency, non rapid-eye movement stage 1 (N1) %, non rapid-eye movement stage 2 (N2) %, and rapid eye movement (REM) %. Suvorexant was well tolerated in RLS, with few and mild adverse events.
    Conclusions: Our results provide the first proof of evidence of the therapeutic efficacy of DORAs in improving sleep and sensory and motor symptoms in RLS. Given orexin's role in pain and sensory processing, potential mechanisms of action are discussed.
    Classification of evidence: The study provides class II evidence supporting the therapeutic efficacy of suvorexant in patients with RLS with sleep disturbance.
    Trial registration: EudraCT#: 2017-004580-12.
    MeSH term(s) Adult ; Humans ; Restless Legs Syndrome/drug therapy ; Orexins/pharmacology ; Orexins/therapeutic use ; Orexin Receptor Antagonists/adverse effects ; Dopamine Agents/therapeutic use ; Sleep ; Double-Blind Method ; Treatment Outcome ; Azepines ; Triazoles
    Chemical Substances Orexins ; suvorexant (081L192FO9) ; Orexin Receptor Antagonists ; Dopamine Agents ; Azepines ; Triazoles
    Language English
    Publishing date 2024-01-21
    Publishing country New Zealand
    Document type Randomized Controlled Trial ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1203800-3
    ISSN 1179-1934 ; 1172-7047
    ISSN (online) 1179-1934
    ISSN 1172-7047
    DOI 10.1007/s40263-023-01055-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Live Cell Imaging Reveals HBV Capsid Translocation from the Nucleus To the Cytoplasm Enabled by Cell Division.

    Romero, Sofia / Unchwaniwala, Nuruddin / Evans, Edward L / Eliceiri, Kevin W / Loeb, Daniel D / Sherer, Nathan M

    mBio

    2023  Volume 14, Issue 2, Page(s) e0330322

    Abstract: Hepatitis B virus (HBV) capsid assembly is traditionally thought to occur predominantly in the cytoplasm, where the virus gains access to the virion egress pathway. To better define sites of HBV capsid assembly, we carried out single cell imaging of HBV ... ...

    Abstract Hepatitis B virus (HBV) capsid assembly is traditionally thought to occur predominantly in the cytoplasm, where the virus gains access to the virion egress pathway. To better define sites of HBV capsid assembly, we carried out single cell imaging of HBV Core protein (Cp) subcellular trafficking over time under conditions supporting genome packaging and reverse transcription in Huh7 hepatocellular carcinoma cells. Time-course analyses including live cell imaging of fluorescently tagged Cp derivatives showed Cp to accumulate in the nucleus at early time points (~24 h), followed by a marked re-distribution to the cytoplasm at 48 to 72 h. Nucleus-associated Cp was confirmed to be capsid and/or high-order assemblages using a novel dual label immunofluorescence strategy. Nuclear-to-cytoplasmic re-localization of Cp occurred predominantly during nuclear envelope breakdown in conjunction with cell division, followed by strong cytoplasmic retention of Cp. Blocking cell division resulted in strong nuclear entrapment of high-order assemblages. A Cp mutant, Cp-V124W, predicted to exhibit enhanced assembly kinetics, also first trafficked to the nucleus to accumulate at nucleoli, consistent with the hypothesis that Cp's transit to the nucleus is a strong and constitutive process. Taken together, these results provide support for the nucleus as an early-stage site of HBV capsid assembly, and provide the first dynamic evidence of cytoplasmic retention after cell division as a mechanism underpinning capsid nucleus-to-cytoplasm relocalization.
    MeSH term(s) Humans ; Capsid/metabolism ; Hepatitis B virus/genetics ; Carcinoma, Hepatocellular/metabolism ; Capsid Proteins/metabolism ; Virus Assembly ; Hepatitis B ; Cell Nucleus/metabolism ; Cytoplasm/metabolism ; Liver Neoplasms ; Cell Division ; Virus Replication
    Chemical Substances Capsid Proteins
    Language English
    Publishing date 2023-02-21
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2557172-2
    ISSN 2150-7511 ; 2161-2129
    ISSN (online) 2150-7511
    ISSN 2161-2129
    DOI 10.1128/mbio.03303-22
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Effect of the Insecticide Chlorpyrifos on Behavioral and Metabolic Aspects of the Spider Polybetes pythagoricus

    Molina, Gabriel / Laino, Aldana / Arrighetti, Florencia / Lacava, Mariangeles / Romero, Sofia / Mijailovsky, Sergio / Garcia, Carlos Fernando

    Environmental Toxicology and Chemistry. 2023 June, v. 42, no. 6 p.1293-1308

    2023  

    Abstract: The toxicity of pesticides to organisms depends on the total amount of chemical exposure. Toxicity can be minimized if the organism recognizes the pesticide and alters its behavior. Furthermore, the physical barrier of cuticular hydrocarbons can prevent ... ...

    Abstract The toxicity of pesticides to organisms depends on the total amount of chemical exposure. Toxicity can be minimized if the organism recognizes the pesticide and alters its behavior. Furthermore, the physical barrier of cuticular hydrocarbons can prevent the entrance of the pesticide into the organism. Finally, if the pesticide enters the body, the organism experiences physiological changes favoring detoxification and the maintenance of homeostasis. We analyzed the behavioral and metabolic response of the spider Polybetes pythagoricus at different times of exposure to the organophosphate pesticide chlorpyrifos. First we observed that the individuals are capable of recognizing and avoiding surfaces treated with pesticides based on a behavioral analysis. Subsequently, we characterized cuticular hydrocarbons as a possible barrier against pesticides. Then we observed that the pesticide provoked histological damage, mainly at the level of the midgut diverticula. Finally, we analyzed the activity of several of the spider's enzymes linked to oxidative stress after exposure to chlorpyrifos for different lengths of time (6, 24, and 48 h). We observed that catalase activity was high at the start, whereas the activity of superoxide dismutase and glutathione S‐transferase changed significantly at 48 h. Lipid peroxidation became high at 6 h, but decreased at 48 h. In conclusion, although P. pythagoricus can avoid contact with chlorpyrifos, this pesticide causes activation of the antioxidant system when it enters the body. Our results make a significant contribution to the ecotoxicology of spiders. Environ Toxicol Chem 2023;42:1293–1308. © 2023 SETAC
    Keywords antioxidants ; biochemical pathways ; catalase ; chlorpyrifos ; ecotoxicology ; glutathione transferase ; histology ; homeostasis ; lipid peroxidation ; midgut ; oxidative stress ; spiders ; superoxide dismutase ; toxicity
    Language English
    Dates of publication 2023-06
    Size p. 1293-1308.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 46234-2
    ISSN 1552-8618 ; 0730-7268
    ISSN (online) 1552-8618
    ISSN 0730-7268
    DOI 10.1002/etc.5607
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Embryonic and post-embryonic development of the spider Polybetes pythagoricus (Sparassidae): A biochemical point of view.

    Romero, Sofia / Laino, Aldana / Molina, Gabriel / Cunningham, Monica / Garcia, Carlos Fernando

    Anais da Academia Brasileira de Ciencias

    2022  Volume 94, Issue 3, Page(s) e20210159

    Abstract: Analysis of energy expense during development has achieved special interest through time on account of the crucial role of the consumption of resources required for offspring survival. Spider eggs have a fixed composition as well as some initial energy ... ...

    Abstract Analysis of energy expense during development has achieved special interest through time on account of the crucial role of the consumption of resources required for offspring survival. Spider eggs have a fixed composition as well as some initial energy that is supplied by mothers. These resources are necessary to support the metabolic expense not only through the embryonic period but also during the post-embryonic period, as well as for post emerging activities before spiderlings become self-sustaining. Depletion of these resources would be critical for spiders since it could give rise to prey competition as well as filial cannibalism. Even though spiders represent a megadiverse order, information regarding the metabolic requirements during spiders development is very scarce. In this study, we analyse the changes in protein, lipid and carbohydrate content as well as the variation in lipovitellin reserves and hemocyanin content during Polybetes pythagoricus development. Our results show that lipovitellins and phospholipids represent the major energy source throughout embryonic and post-embryonic development. Lipovitellin apolipoproteins are gradually consumed but are later depleted after dispersion. Phosphatidylethanolamine is mainly consumed during the post-embryonic period, while triacylglycerides are consumed after juveniles' dispersion. Finally, hemocyanin concentration starts to increase in postembryonic stages.
    MeSH term(s) Animals ; Cannibalism ; Carbohydrates ; Embryonic Development ; Hemocyanins/chemistry ; Hemocyanins/metabolism ; Spiders
    Chemical Substances Carbohydrates ; Hemocyanins (9013-72-3)
    Language English
    Publishing date 2022-08-15
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 2046885-4
    ISSN 1678-2690 ; 0001-3765
    ISSN (online) 1678-2690
    ISSN 0001-3765
    DOI 10.1590/0001-3765202220210159
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Apnea obstructiva de sueño.

    Roncero, Alejandra / Castro, Sonia / Herrero, Julia / Romero, Sofía / Caballero, Candela / Rodriguez, Paula

    Open respiratory archives

    2022  Volume 4, Issue 3, Page(s) 100185

    Abstract: Obstructive sleep apnea (OSA) is defined as the presence of an apnea-hyponea index (AHI)>15/h, predominantly obstructive or AHI greater than 5 with symptoms, the classic symptoms are observed apneas, daytime sleepiness and snoring, however, there are ... ...

    Title translation Obstructive Sleep Apnea.
    Abstract Obstructive sleep apnea (OSA) is defined as the presence of an apnea-hyponea index (AHI)>15/h, predominantly obstructive or AHI greater than 5 with symptoms, the classic symptoms are observed apneas, daytime sleepiness and snoring, however, there are many other associated symptoms. To assess the severity of OSA, classically, only the AHI value was considered, but there is increasing evidence to implicate other factors. The predisposition to develop OSA is determined by anatomical and functional features. Having OSA increases the risk of accidents, high blood pressure (HBP) and is associated with cardiovascular risk, diabetes mellitus (DM), cardiac arrhythmia and neoplasms. To assess the probability of OSA, questionnaires and scales have been developed to assess symptoms, the certain diagnosis is obtained by polysomnography (PSG), which is the gold standard test, or polygraphy, which is a simpler and more accessible diagnostic test for diagnosis validated, the use of one or the other will depend on the suspicion and the associated comorbidities. Treatments for sleep apnea increasingly tend to be more individualized based on the characteristics of the patient and all are complementary. Hygienic-dietary measures should be applied in all patients, continuous positive airway pressure (CPAP) is the most effective treatment and with the most evidence, but other treatments are also available such as mandibular advancement devices (MAD), postural therapy and surgical options among others. Telemedicine is advancing in the follow-up of patients with OSA, both from non-face-to-face consultations and control of equipment via Wi-Fi to assess adherence, efficacy and correct control of therapy.
    Language Spanish
    Publishing date 2022-06-09
    Publishing country Spain
    Document type English Abstract ; Journal Article
    ISSN 2659-6636
    ISSN (online) 2659-6636
    DOI 10.1016/j.opresp.2022.100185
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Effect of the Insecticide Chlorpyrifos on Behavioral and Metabolic Aspects of the Spider Polybetes pythagoricus.

    Molina, Gabriel / Laino, Aldana / Arrighetti, Florencia / Lacava, Mariangeles / Romero, Sofia / Mijailovsky, Sergio / Garcia, Carlos Fernando

    Environmental toxicology and chemistry

    2023  Volume 42, Issue 6, Page(s) 1293–1308

    Abstract: The toxicity of pesticides to organisms depends on the total amount of chemical exposure. Toxicity can be minimized if the organism recognizes the pesticide and alters its behavior. Furthermore, the physical barrier of cuticular hydrocarbons can prevent ... ...

    Abstract The toxicity of pesticides to organisms depends on the total amount of chemical exposure. Toxicity can be minimized if the organism recognizes the pesticide and alters its behavior. Furthermore, the physical barrier of cuticular hydrocarbons can prevent the entrance of the pesticide into the organism. Finally, if the pesticide enters the body, the organism experiences physiological changes favoring detoxification and the maintenance of homeostasis. We analyzed the behavioral and metabolic response of the spider Polybetes pythagoricus at different times of exposure to the organophosphate pesticide chlorpyrifos. First we observed that the individuals are capable of recognizing and avoiding surfaces treated with pesticides based on a behavioral analysis. Subsequently, we characterized cuticular hydrocarbons as a possible barrier against pesticides. Then we observed that the pesticide provoked histological damage, mainly at the level of the midgut diverticula. Finally, we analyzed the activity of several of the spider's enzymes linked to oxidative stress after exposure to chlorpyrifos for different lengths of time (6, 24, and 48 h). We observed that catalase activity was high at the start, whereas the activity of superoxide dismutase and glutathione S-transferase changed significantly at 48 h. Lipid peroxidation became high at 6 h, but decreased at 48 h. In conclusion, although P. pythagoricus can avoid contact with chlorpyrifos, this pesticide causes activation of the antioxidant system when it enters the body. Our results make a significant contribution to the ecotoxicology of spiders. Environ Toxicol Chem 2023;42:1293-1308. © 2023 SETAC.
    MeSH term(s) Animals ; Insecticides/metabolism ; Chlorpyrifos/toxicity ; Spiders/metabolism ; Catalase/metabolism ; Pesticides/toxicity ; Antioxidants/metabolism ; Oxidative Stress
    Chemical Substances Insecticides ; Chlorpyrifos (JCS58I644W) ; Catalase (EC 1.11.1.6) ; Pesticides ; Antioxidants
    Language English
    Publishing date 2023-05-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 46234-2
    ISSN 1552-8618 ; 0730-7268
    ISSN (online) 1552-8618
    ISSN 0730-7268
    DOI 10.1002/etc.5607
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: A novel partial deletion of the TBL1XR1 gene detected using SNP array in a patient with motor delay, growth failure and Klinefelter syndrome.

    García-Payá, Elena / Sirera Sirera, Paula / Huertas-García, Isabel / Hernández Romero, Sofía Daniela / Olivas García, Julia

    Cytogenetic and genome research

    2023  

    Abstract: Introduction: Co-existence pathogenic copy number variation with aneuploidy is a rare phenomenon. Whole TBL1XR1 gene deletions are described and associated with autosomal dominant intellectual development disorder-41 (#616944). However, the phenotypical ...

    Abstract Introduction: Co-existence pathogenic copy number variation with aneuploidy is a rare phenomenon. Whole TBL1XR1 gene deletions are described and associated with autosomal dominant intellectual development disorder-41 (#616944). However, the phenotypical expression of the TBL1XR1 partial deletion is poorly described.
    Case presentation: We describe the case of a male, aged 18 months, who presented delayed motor development, gait disturbance, mild generalized hypotonia, minor dysmorphic features and growth failure, in addition to Klinefelter syndrome (KS). The single nucleotide polymorphism array revealed the de novo pathogenic interstitial deletion of chromosome 3q26.32 of 202 kb size that encompassed the first two exons of one relevant coding gene: TBL1XR1 (*608628).
    Conclusion: We report a male without clinical signs of KS and overlapped phenotypical features with another TBL1XR1 related disease: Pierpont syndrome (#602342). This patient extends the phenotypic spectrum of TBL1XR1 gene pathogenic variants.
    Language English
    Publishing date 2023-10-16
    Publishing country Switzerland
    Document type Case Reports
    ZDB-ID 2087824-2
    ISSN 1424-859X ; 1424-8581
    ISSN (online) 1424-859X
    ISSN 1424-8581
    DOI 10.1159/000534530
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Maternally inherited deletion encompassing the RTL1as and MEG8 genes of the human 14q32 imprinted region in a patient with a mild Kagami-Ogata syndrome phenotype.

    Sirera Sirera, Paula / García-Payá, Elena / Olivas García, Julia / Jadraque Rodríguez, Rocío / Hernández Romero, Sofía Daniela

    American journal of medical genetics. Part A

    2023  Volume 191, Issue 8, Page(s) 2225–2231

    Abstract: Kagami-Ogata syndrome and Temple syndrome are imprinting disorders caused by the abnormal expression of genes in an imprinted cluster on chromosome 14q32. Here, we report a female with mild features of the Kagami-Ogata syndrome phenotype with ... ...

    Abstract Kagami-Ogata syndrome and Temple syndrome are imprinting disorders caused by the abnormal expression of genes in an imprinted cluster on chromosome 14q32. Here, we report a female with mild features of the Kagami-Ogata syndrome phenotype with polyhydramnios, neonatal hypotonia, feeding difficulties, abnormal foot morphology, patent foramen ovale, distal arthrogryposis, normal facial profile, and a bell-shaped thorax without coat hanger ribs. The single nucleotide polymorphism array revealed the interstitial deletion of chromosome 14q32.2-q32.31 (117 kb in size), involving the RTL1as and MEG8 genes, and other small nucleolar RNAs and microRNAs. The differentially methylated regions (DMRs) appeared unaltered. The RTL1as gene deletion and the normal methylation pattern of the MEG3 gene loci were confirmed by methylation-specific multiplex ligation-dependent probe amplification. Deletions of the 14q32 region without involving DMRs, and encompassing only the RTL1as and MEG8 genes, are poorly described in the literature. The mother's chromosomal microarray also confirmed the identical 14q32.2 deletion, although she presented a normal phenotype. The maternally inherited 14q32 deletion was responsible for Kagami-Ogata syndrome in our patient. It was not sufficient, however, to produce Temple syndrome or any other pathogenic phenotype in the patient's mother.
    MeSH term(s) Infant, Newborn ; Pregnancy ; Humans ; Female ; Chromosome Disorders/genetics ; Genomic Imprinting ; Maternal Inheritance ; Phenotype ; Abnormalities, Multiple/genetics ; Uniparental Disomy ; Chromosomes, Human, Pair 14/genetics
    Language English
    Publishing date 2023-05-24
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2108614-X
    ISSN 1552-4833 ; 0148-7299 ; 1552-4825
    ISSN (online) 1552-4833
    ISSN 0148-7299 ; 1552-4825
    DOI 10.1002/ajmg.a.63251
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  10. Article: Disordered proteins interact with the chemical environment to tune their protective function during drying.

    Kc, Shraddha / Nguyen, Kenny / Nicholson, Vincent / Walgren, Annie / Trent, Tony / Gollub, Edith / Romero, Sofia / Holehouse, Alex S / Sukenik, Shahar / Boothby, Thomas C

    bioRxiv : the preprint server for biology

    2024  

    Abstract: The conformational ensemble and function of intrinsically disordered proteins (IDPs) are sensitive to their solution environment. The inherent malleability of disordered proteins combined with the exposure of their residues accounts for this sensitivity. ...

    Abstract The conformational ensemble and function of intrinsically disordered proteins (IDPs) are sensitive to their solution environment. The inherent malleability of disordered proteins combined with the exposure of their residues accounts for this sensitivity. One context in which IDPs play important roles that is concomitant with massive changes to the intracellular environment is during desiccation (extreme drying). The ability of organisms to survive desiccation has long been linked to the accumulation of high levels of cosolutes such as trehalose or sucrose as well as the enrichment of IDPs, such as late embryogenesis abundant (LEA) proteins or cytoplasmic abundant heat soluble (CAHS) proteins. Despite knowing that IDPs play important roles and are co-enriched alongside endogenous, species-specific cosolutes during desiccation, little is known mechanistically about how IDP-cosolute interactions influence desiccation tolerance. Here, we test the notion that the protective function of desiccation-related IDPs is enhanced through conformational changes induced by endogenous cosolutes. We find that desiccation-related IDPs derived from four different organisms spanning two LEA protein families and the CAHS protein family, synergize best with endogenous cosolutes during drying to promote desiccation protection. Yet the structural parameters of protective IDPs do not correlate with synergy for either CAHS or LEA proteins. We further demonstrate that for CAHS, but not LEA proteins, synergy is related to self-assembly and the formation of a gel. Our results demonstrate that functional synergy between IDPs and endogenous cosolutes is a convergent desiccation protection strategy seen among different IDP families and organisms, yet, the mechanisms underlying this synergy differ between IDP families.
    Language English
    Publishing date 2024-03-01
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.02.28.582506
    Database MEDical Literature Analysis and Retrieval System OnLINE

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