Ribosomal DNA instability: an evolutionary conserved fuel for inflammaging.
Ribosomal DNA instability: an evolutionary conserved fuel for inflammaging. Ageing Res Rev. 2020 Jan 09;:101018 Authors: Storci G, Bacalini MG, Bonifazi F, Garagnani P, De Carolis S, Salvioli S, Olivieri F, Bonafè M Abstract Across eukaryotes, ribosomal DNA (rDNA) loci are characterized by intrinsic genomic instability due to their repetitive nature and their base composition that facilitate DNA double strand breaks and RNA:DNA hybrids formation. In the yeast, ribosomal DNA instability affects lifespan via the formation of extrachromosomal rDNA circles (ERC) that accrue into aged cells. In humans, rDNA instability has long been reported in a variety of progeric syndromes caused by the dysfunction of DNA helicases, but its role in physiological aging and longevity still needs to be clarified. Here we propose that rDNA instability leads to the activation of innate immunity and inflammation via the interaction with the cytoplasmic DNA sensing machinery. Owing to the recent clarified role of cytoplasmic DNA in the pro-inflammatory phenotype of senescent cells, we hypothesize that the accrual of rDNA derived molecules (i.e. ERC and RNA:DNA hybrids) may have a role in aging by contributing to inflammaging i.e. the systemic pro-inflammatory drift that associates with the onset of geriatric syndromes and age related dysfunctions in humans. PMID: 31926964 [PubMed - as supplied by publisher]
Authors: Messaadi N, Bayen S, Beghin L, Lefebvre JM, Colleau S, Deken V, Cottencin O, Quersin F, Descamps A, Vanhelst J Abstract BACKGROUND: Screen media usage has become increasingly commonplace in daily life with children initiating themselves to screen media at an early age. Given the high prevalence of screen viewing among children worldwide, its impact on children's health has become a cause for concern. Unfortunately, little information on the independent association between sleep habits and screen time in French children is currently available. The main aim of this study was to assess possible...
Publication date: Available online 28 May 2020Source: Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of LipidsAuthor(s): Aline Bayerle, Christian Marsching, Mariona Rabionet, Shaalee Dworski, Mustafa A. Kamani, Chandramohan Chitraju, Nina L. Gluchowski, Katlyn R. Gabriel, Silke Herzer, Richard Jennemann, Thierry Levade, Jeffrey A. Medin, Roger Sandhoff
PMID: 32464083 [PubMed - as supplied by publisher]
Conclusions: EVs from buffaloes infected with Theileria spp. were successfully isolated and characterized. This is an advance in the knowledge of host-parasite relationship that contributes to the understanding of host immune response and theileriosis evasion mechanisms. These findings may pave the way for searching new EVs candidate-markers for a better production of safe biological products derived from buffaloes.
Conclusions: JZTX-X selectively suppresses Kv4.2 and Kv4.3 potassium channe l activity in a concentration- and voltage-dependent manner and causes long-lasting mechanical hyperalgesia.
Conclusion: Our results suggest a different biochemical composition of S. polymorpha venom, based on the different effects of four venom fractions on the cells tested, according to statistical evidence. Fractions F6 and F7 caused the most important alterations.
Publication date: Available online 29 May 2020Source: The Annals of Thoracic SurgeryAuthor(s): Irsa S. Hasan, Hartzell V. Schaff, Richard C. Daly, Katherine S. King, John M. Stulak, Kevin L. Greason, Joseph A. Dearani
Publication date: Available online 29 May 2020Source: The Annals of Thoracic SurgeryAuthor(s): Takafumi Ouchi, Noriyuki Kato, Hiroaki Kato, Takatoshi Higashigawa, Hisato Ito, Ken Nakajima, Shuji Chino, Toshiya Tokui, Toru Mizumoto, Hajime Sakuma
Publication date: September 2020Source: Interdisciplinary Neurosurgery, Volume 21Author(s): Nobuya Murakami, Takato Morioka, Satoshi O. Suzuki, Nobutaka Mukae, Takafumi Shimogawa, Yoshihiro Matsuo, Takakazu Sasaguri, Masahiro Mizoguchi
Publication date: September 2020Source: Interdisciplinary Neurosurgery, Volume 21Author(s): Zachary K. Christian, Kimmo J. Hatanpaa, Richard J. Auchus, Stephen R. Hammes, Ankur R. Patel, Bruce E. Mickey