PMID- 32111063 OWN - NLM STAT- MEDLINE DCOM- 20201208 LR - 20201214 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 21 IP - 5 DP - 2020 Feb 26 TI - Guanosine-Based Nucleotides, the Sons of a Lesser God in the Purinergic Signal Scenario of Excitable Tissues. LID - 10.3390/ijms21051591 [doi] LID - 1591 AB - Purines are nitrogen compounds consisting mainly of a nitrogen base of adenine (ABP) or guanine (GBP) and their derivatives: nucleosides (nitrogen bases plus ribose) and nucleotides (nitrogen bases plus ribose and phosphate). These compounds are very common in nature, especially in a phosphorylated form. There is increasing evidence that purines are involved in the development of different organs such as the heart, skeletal muscle and brain. When brain development is complete, some purinergic mechanisms may be silenced, but may be reactivated in the adult brain/muscle, suggesting a role for purines in regeneration and self-repair. Thus, it is possible that guanosine-5'-triphosphate (GTP) also acts as regulator during the adult phase. However, regarding GBP, no specific receptor has been cloned for GTP or its metabolites, although specific binding sites with distinct GTP affinity characteristics have been found in both muscle and neural cell lines. Finally, even if the cross regulation mechanisms between the two different purines (ABP and GBP) are still largely unknown, it is now possible to hypothesize the existence of specific signal paths for guanosine-based nucleotides that are capable of modulating the intensity and duration of the intracellular signal, particularly in excitable tissues such as brain and muscle. FAU - Mancinelli, Rosa AU - Mancinelli R AD - Department of Neuroscience Imaging and Clinical Sciences, University "G. d'Annunzio" of Chieti-Pescara, 66100 Chieti, Italy. AD - Interuniversity Institute of Miology (IIM), 66100 Chieti, Italy. FAU - Fano-Illic, Giorgio AU - Fano-Illic G AD - Interuniversity Institute of Miology (IIM), 66100 Chieti, Italy. AD - Libera Universita di Alcatraz, Santa Cristina di Gubbio, 06024 Gubbio, Italy. FAU - Pietrangelo, Tiziana AU - Pietrangelo T AD - Department of Neuroscience Imaging and Clinical Sciences, University "G. d'Annunzio" of Chieti-Pescara, 66100 Chieti, Italy. AD - Interuniversity Institute of Miology (IIM), 66100 Chieti, Italy. FAU - Fulle, Stefania AU - Fulle S AD - Department of Neuroscience Imaging and Clinical Sciences, University "G. d'Annunzio" of Chieti-Pescara, 66100 Chieti, Italy. AD - Interuniversity Institute of Miology (IIM), 66100 Chieti, Italy. LA - eng GR - Research grant 2007 and 2011/University G.d'Annunzio of Chieti-Pescara/ PT - Journal Article PT - Review DEP - 20200226 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Guanine Nucleotides) RN - 0 (Nucleosides) RN - 0 (Nucleotides) RN - 0 (Purines) RN - 0 (Receptors, Purinergic) RN - 12133JR80S (Guanosine) RN - 5Z93L87A1R (Guanine) RN - 86-01-1 (Guanosine Triphosphate) RN - W60KTZ3IZY (purine) SB - IM MH - Brain/metabolism MH - Embryonic Development/physiology MH - Guanine/metabolism MH - Guanine Nucleotides/metabolism MH - Guanosine/*metabolism MH - Guanosine Triphosphate/metabolism MH - Humans MH - Muscles/metabolism MH - Nervous System/metabolism MH - Nucleosides/metabolism MH - Nucleotides/*metabolism MH - Purines/*metabolism MH - Receptors, Purinergic/metabolism PMC - PMC7084674 OTO - NOTNLM OT - guanine-based purines (GBPs) OT - purine receptors OT - purinergic signaling COIS- The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. EDAT- 2020/03/01 06:00 MHDA- 2020/12/15 06:00 PMCR- 2020/03/01 CRDT- 2020/03/01 06:00 PHST- 2020/01/30 00:00 [received] PHST- 2020/02/20 00:00 [revised] PHST- 2020/02/25 00:00 [accepted] PHST- 2020/03/01 06:00 [entrez] PHST- 2020/03/01 06:00 [pubmed] PHST- 2020/12/15 06:00 [medline] PHST- 2020/03/01 00:00 [pmc-release] AID - ijms21051591 [pii] AID - ijms-21-01591 [pii] AID - 10.3390/ijms21051591 [doi] PST - epublish SO - Int J Mol Sci. 2020 Feb 26;21(5):1591. doi: 10.3390/ijms21051591.