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            <front>

                <journal-meta>
                                                                <journal-id>jnrs</journal-id>
            <journal-title-group>
                                                                                    <journal-title>Journal of New Results in Science</journal-title>
            </journal-title-group>
                                        <issn pub-type="epub">1304-7981</issn>
                                                                                            <publisher>
                    <publisher-name>Tokat Gaziosmanpasa University</publisher-name>
                </publisher>
                    </journal-meta>
                <article-meta>
                                        <article-id/>
                                                                <article-categories>
                                            <subj-group  xml:lang="en">
                                                            <subject>Proteomics and Intermolecular Interactions</subject>
                                                            <subject>Biochemistry and Cell Biology (Other)</subject>
                                                    </subj-group>
                                            <subj-group  xml:lang="tr">
                                                            <subject>Proteomik ve Moleküller Arası Etkileşimler</subject>
                                                            <subject>Biyokimya ve Hücre Biyolojisi (Diğer)</subject>
                                                    </subj-group>
                                    </article-categories>
                                                                                                                                                        <title-group>
                                                                                                                        <article-title>Stress Markers and Post-COVID Insomnia: Investigating Copeptin and Melatonin Levels in Post-COVID-19</article-title>
                                                                                                    </title-group>
            
                                                    <contrib-group content-type="authors">
                                                                        <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0002-2796-9511</contrib-id>
                                                                <name>
                                    <surname>Güzelgül</surname>
                                    <given-names>Figen</given-names>
                                </name>
                                                                    <aff>TOKAT GAZIOSMANPASA UNIVERSITY</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0003-0695-326X</contrib-id>
                                                                <name>
                                    <surname>Abdelmageed</surname>
                                    <given-names>Marwa</given-names>
                                </name>
                                                                    <aff>TOKAT GAZIOSMANPASA UNIVERSITY</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0002-7901-3466</contrib-id>
                                                                <name>
                                    <surname>İnönü Köseoğlu</surname>
                                    <given-names>Handan</given-names>
                                </name>
                                                                    <aff>TOKAT GAZIOSMANPASA UNIVERSITY</aff>
                                                            </contrib>
                                                    <contrib contrib-type="author">
                                                                    <contrib-id contrib-id-type="orcid">
                                        https://orcid.org/0000-0003-4714-6894</contrib-id>
                                                                <name>
                                    <surname>Akpınar Aslan</surname>
                                    <given-names>Esma</given-names>
                                </name>
                                                                    <aff>TOKAT GAZIOSMANPASA UNIVERSITY</aff>
                                                            </contrib>
                                                                                </contrib-group>
                        
                                        <pub-date pub-type="pub" iso-8601-date="20260430">
                    <day>04</day>
                    <month>30</month>
                    <year>2026</year>
                </pub-date>
                                        <volume>15</volume>
                                        <issue>1</issue>
                                        <fpage>84</fpage>
                                        <lpage>94</lpage>
                        
                        <history>
                                    <date date-type="received" iso-8601-date="20251204">
                        <day>12</day>
                        <month>04</month>
                        <year>2025</year>
                    </date>
                                                    <date date-type="accepted" iso-8601-date="20260302">
                        <day>03</day>
                        <month>02</month>
                        <year>2026</year>
                    </date>
                            </history>
                                        <permissions>
                    <copyright-statement>Copyright © 2012, Journal of New Results in Science</copyright-statement>
                    <copyright-year>2012</copyright-year>
                    <copyright-holder>Journal of New Results in Science</copyright-holder>
                </permissions>
            
                                                                                                <abstract><p>Insomnia is a prevalent symptom affecting 5.4% to 64% of individuals who have recovered from COVID-19. In this study, we aimed to elucidate the role of copeptin and melatonin in the pathogenesis of post-COVID-19 and insomnia in COVID-19 survivors. Thirty COVID-19-recovered patients and fifteen healthy controls were included in the study. Patients were categorized into two groups: individuals with post-COVID insomnia (Insomnia Severity Index [ISI] above 15, n=10) and those without (n=20). Insomnia patients received either Trazodone 50 mg or Mirtazapine 15 mg as a sleep disturbance treatment once a day for three months. Serum copeptin and melatonin were evaluated. Melatonin and copeptin levels demonstrated a statistical significance between the study groups (p</p></abstract>
                                                            
            
                                                            <kwd-group>
                                                    <kwd>Melatonin</kwd>
                                                    <kwd>  Copeptin</kwd>
                                                    <kwd>  COVID-19</kwd>
                                                    <kwd>  insomnia</kwd>
                                            </kwd-group>
                            
                                                                                                                    <funding-group specific-use="FundRef">
                    <award-group>
                                                    <funding-source>
                                <named-content content-type="funder_name">This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.</named-content>
                            </funding-source>
                                                                            <award-id>There is no project number</award-id>
                                            </award-group>
                </funding-group>
                                </article-meta>
    </front>
    <back>
                            <ref-list>
                                    <ref id="ref1">
                        <label>1</label>
                        <mixed-citation publication-type="journal">World Health Organization. WHO COVID-19 dashboard – Cases (2025) Accessed 10 July 2025.</mixed-citation>
                    </ref>
                                    <ref id="ref2">
                        <label>2</label>
                        <mixed-citation publication-type="journal">M. Garg, M. Maralakunte, S. Garg, S. Dhooria, I. Sehgal, A. S. Bhalla, R. Vijayvergiya, S. Grover, V. Bhatia, …, M. S. Sandhu, The conundrum of ‘Long-COVID-19ʹ, a narrative review, International Journal of General Medicine 14 (2021) 2491–2506.</mixed-citation>
                    </ref>
                                    <ref id="ref3">
                        <label>3</label>
                        <mixed-citation publication-type="journal">J. B. Soriano, S. Murthy, J. C. Marshall, P. Relan, J. V. Diaz, A clinical case definition of post-COVID-19 condition by a Delphi consensus, Lancet. Infectious Diseases 22 (4) (2022) e102–e107.</mixed-citation>
                    </ref>
                                    <ref id="ref4">
                        <label>4</label>
                        <mixed-citation publication-type="journal">D. Gonçalves, J. P. Costa, S. Silva, M. Tavares, H. Barros, P. Meireles, The association between probable POST‐COVID ‐19 condition and sleep‐related parameters: A longitudinal study of non‐hospitalised patients, Journal of Sleep Research 33 (6) (2024) e14215.</mixed-citation>
                    </ref>
                                    <ref id="ref5">
                        <label>5</label>
                        <mixed-citation publication-type="journal">O. V. Kotova, V. E. Medvedev, M. G. Poluektov, A. A. Belyaev, E. S. Akarachkova, Sleep disorders in Post-COVID syndrome: A psychiatric or neurological problem?, Neuroscience and Behavioral Physiology 53 (1) (2023) 16–20.</mixed-citation>
                    </ref>
                                    <ref id="ref6">
                        <label>6</label>
                        <mixed-citation publication-type="journal">V. Chippa, A. Aleem, F. Anjum. Postacute coronavirus (COVID-19) syndrome, StatPearls [Internet], Treasure Island (FL): StatPearls Publishing, 2025.</mixed-citation>
                    </ref>
                                    <ref id="ref7">
                        <label>7</label>
                        <mixed-citation publication-type="journal">N. L. Rauwerda, T. A. Kuut, A. M. J. Braamse, I. Csorba, P. Nieuwkerk, A. Van Straten, H. Knoop, Insomnia and sleep characteristics in post COVID-19 fatigue: A cross-sectional case-controlled study, Journal of Psychosomatic Research 177 (2024) 111522.</mixed-citation>
                    </ref>
                                    <ref id="ref8">
                        <label>8</label>
                        <mixed-citation publication-type="journal">R. Tedjasukmana, A. Budikayanti, W. R. Islamiyah, A. M. A. L. Witjaksono, M. Hakim, Sleep disturbance in post COVID-19 conditions: Prevalence and quality of life, Frontiers in Neurology 13 (2023) 1095606.</mixed-citation>
                    </ref>
                                    <ref id="ref9">
                        <label>9</label>
                        <mixed-citation publication-type="journal">H. M. Al-Kuraishy, A. I. Al-Gareeb, S. Qusti, E. M. Alshammari, F. O. Atanu, G. E.- S. Batiha, Arginine vasopressin and pathophysiology of COVID-19: An innovative perspective, Biomedicine &amp; Pharmacotherapy 143 (2021) 112193.</mixed-citation>
                    </ref>
                                    <ref id="ref10">
                        <label>10</label>
                        <mixed-citation publication-type="journal">E. Solomonova, Y. E. A. Lee, S. Robins, L. King, N. Feeley, I. Gold, B. Hayton, E. Libman, C. Nagy, …, P.  Zelkowitz, Sleep quality is associated with vasopressin methylation in pregnant and postpartum women with a history of psychosocial stress, Psychoneuroendocrinology 107 (2019) 160–168.</mixed-citation>
                    </ref>
                                    <ref id="ref11">
                        <label>11</label>
                        <mixed-citation publication-type="journal">M. Abdelmageed, F, Güzelgül, Copeptin: Up-to-date diagnostic and prognostic role highlight, Analytical Biochemistry 673 (2023) 115181.</mixed-citation>
                    </ref>
                                    <ref id="ref12">
                        <label>12</label>
                        <mixed-citation publication-type="journal">R. J. Dressle, B. Feige, K. Spiegelhalder, C. Schmucker, F. Benz, N. C. Mey, D. Riemann, HPA axis activity in patients with chronic insomnia: A systematic review and meta-analysis of case–control studies, Sleep Medicine Reviews 62 (2022) 101588.</mixed-citation>
                    </ref>
                                    <ref id="ref13">
                        <label>13</label>
                        <mixed-citation publication-type="journal">D. A.  Schmid, A. Wichniak, M. Uhr, M. Ising, H. Brunner, K. Held, J. C. Weikel, A. Sonntag, A. Steiger, Changes of sleep architecture, spectral composition of sleep EEG, the nocturnal secretion of cortisol, ACTH, GH, prolactin, melatonin, ghrelin, and leptin, and the DEX-CRH test in depressed patients during treatment with mirtazapine, Neuropsychopharmacology 31 (4) (2006) 832–844.</mixed-citation>
                    </ref>
                                    <ref id="ref14">
                        <label>14</label>
                        <mixed-citation publication-type="journal">K. Y. Jaffer, T. Chang, B. Vanle, J. Dang, A. J. Steiner, N. Loera, M. Abdelmesseh, I. Danovitch, W. W. Ishak, Trazodone for insomnia: A systematic review, Innovations in Clinical Neuroscience 14 (7–8) (2017) 24–34.</mixed-citation>
                    </ref>
                                    <ref id="ref15">
                        <label>15</label>
                        <mixed-citation publication-type="journal">C. M. Morin, G. Belleville, L. Bélanger, H. Ivers, The insomnia severity index: Psychometric indicators to detect insomnia cases and evaluate treatment response, Sleep 34 (5) (2011) 601–608.</mixed-citation>
                    </ref>
                                    <ref id="ref16">
                        <label>16</label>
                        <mixed-citation publication-type="journal">H. T. X.  Hoang, W. F. Yeung, Q. T. M. Truong, C. T. Le, A. T. M. Bui, Q. V. Bui, Q. T. L. Le, L. H. Quach, Sleep quality among non-hospitalized COVID-19 survivors: A national cross-sectional study, Frontiers in Public Health 11 (2024) 1281012.</mixed-citation>
                    </ref>
                                    <ref id="ref17">
                        <label>17</label>
                        <mixed-citation publication-type="journal">X. X. Zhang, S. Y. Sun, Z. J. Ma, Z. Y. Li, Y. S. Zhou, Y. Yang, J. X. Rao, P. Zhang, X. Y. Kong, …, G. H. Chen, Changed nocturnal levels of stress-related hormones couple with sleep-wake states in the patients with chronic insomnia disorder: A clinical pilot study, Sleep Medicine 117 (2024) 177–183.</mixed-citation>
                    </ref>
                                    <ref id="ref18">
                        <label>18</label>
                        <mixed-citation publication-type="journal">P. L. Nonglait, S. V. Madhu, N. Raizada, A. Aggarwal, R. Ahmed, M. Aslam, High level of psychological stress in COVID-19 recovered individuals: Role of copeptin as a potential biomarker, Frontiers in Psychology 14 (2023) 1253396.</mixed-citation>
                    </ref>
                                    <ref id="ref19">
                        <label>19</label>
                        <mixed-citation publication-type="journal">J. T. Chen, P. Zhang, X. Y. Kong, Y. J.  Ge, X. Y. Li, S. Yang, S. He, G. H. Chen, Changed serum levels of CD62E+, angiotensin II and copeptin in patients with chronic insomnia disorder: A link between insomnia and stroke?, Sleep Medicine 91 (2022) 96–104.</mixed-citation>
                    </ref>
                                    <ref id="ref20">
                        <label>20</label>
                        <mixed-citation publication-type="journal">S. Schreiber, C. G. Pick, Trazodone and mirtazapine: A possible opioid involvement in their use (at low dose) for sleep?, Medical Hypotheses 136 (2020) 109501.</mixed-citation>
                    </ref>
                                    <ref id="ref21">
                        <label>21</label>
                        <mixed-citation publication-type="journal">S. M. Stahl, Mechanism of action of trazodone: A multifunctional drug, CNS Spectrums, 14 (10) (2009) 536–546.</mixed-citation>
                    </ref>
                                    <ref id="ref22">
                        <label>22</label>
                        <mixed-citation publication-type="journal">C. L. DeVane, D. R. Grothe, S. L. Smith, Pharmacology of antidepressants: Focus on nefazodone, Journal of Clinical Psychiatry 63 (1) (2002) 10–17.</mixed-citation>
                    </ref>
                                    <ref id="ref23">
                        <label>23</label>
                        <mixed-citation publication-type="journal">A. Agorastos, A. Sommer, A. Heinig, K, Wiedemann, C. Demiralay, Vasopressin surrogate marker copeptin as a potential novel endocrine biomarker for antidepressant treatment response in major depression: A pilot study, Frontiers in Psychiatry 11 (2020) 453.</mixed-citation>
                    </ref>
                                    <ref id="ref24">
                        <label>24</label>
                        <mixed-citation publication-type="journal">M. Adamsson, T. Laike, T. Morita, Annual variation in daily light exposure and circadian change of melatonin and cortisol concentrations at a northern latitude with large seasonal differences in photoperiod length, Journal of Physiological Anthropology 36 (1) (2017) 6.</mixed-citation>
                    </ref>
                                    <ref id="ref25">
                        <label>25</label>
                        <mixed-citation publication-type="journal">B. Rzepka-Migut, J. Paprocka, Melatonin-measurement methods and the factors modifying the results. A systematic review of the literature, International Journal of Environmental Research and Public Health 17 (6) (2020) 1916.</mixed-citation>
                    </ref>
                            </ref-list>
                    </back>
    </article>
