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  1. Article ; Online: Trust the Process: Prolonged Babesia Parasitemia in an Elderly Man with Asplenia from the American Midwest.

    Ivancich, Marko / Lutwick, Larry / Shweta, F N U

    The American journal of case reports

    2022  Volume 23, Page(s) e936326

    Abstract: BACKGROUND Babesia species are intraerythrocytic parasitic protozoa that are endemic to the Northeast and north Midwest of the United States. Babesia microti is the most common cause of babesiosis in North America and causes a malaria-like tick-borne ... ...

    Abstract BACKGROUND Babesia species are intraerythrocytic parasitic protozoa that are endemic to the Northeast and north Midwest of the United States. Babesia microti is the most common cause of babesiosis in North America and causes a malaria-like tick-borne parasitosis. Babesia is commonly transmitted through the bite of Ixodes species ticks, often concomitantly with other tick-borne organisms such as Borrelia burgdorferi, Ehrlichia, Rickettsia rickettsii, and Anaplasma phagocytophilum. In the Midwest, Lyme disease is the most common tick-borne illness, and other organisms can sometimes be overlooked. The risk of tick-borne parasitic or bacterial infection is increased in patients after splenectomy. CASE REPORT An 89-year-old man with asplenia and multiple other comorbidities presented to the Emergency Department after a fall at home preceded by 2 to 3 days of fever and loss of appetite and 1 week of generalized weakness. The patient had thrombocytopenia, leukocytosis with neutrophilia, transaminitis, hyperbilirubinemia, and elevated creatine kinase level consistent with tick-borne illness. Laboratory testing revealed Borrelia and Babesia co-infection and other culprits were ruled out via high sensitivity PCR. Owing to the patient's asplenic status, the babesiosis was slow to resolve with appropriate treatment. After an extended 8-week treatment with azithromycin and atovaquone, the patient demonstrated clinical resolution of babesiosis with a negative blood smear. CONCLUSIONS First-line treatment with azithromycin and atovaquone is effective in treating babesiosis even in complicated patients, such as this elderly, asplenic patient. However, in cases such as this, an extended course of a first-line treatment regimen is still appropriate.
    MeSH term(s) Aged ; Aged, 80 and over ; Atovaquone ; Azithromycin ; Babesia ; Babesiosis/diagnosis ; Babesiosis/drug therapy ; Humans ; Male ; Parasitemia ; Trust ; United States
    Chemical Substances Azithromycin (83905-01-5) ; Atovaquone (Y883P1Z2LT)
    Language English
    Publishing date 2022-07-18
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 2517183-5
    ISSN 1941-5923 ; 1941-5923
    ISSN (online) 1941-5923
    ISSN 1941-5923
    DOI 10.12659/AJCR.936326
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Self-reported concussion history among midwestern skiers and snowboarders.

    Ivancich, Marko / Berry, Vince / Clark, Michael / Beaumont, Andrew / Norrbom, Corina / Amundson, Jeffrey C

    Concussion (London, England)

    2023  Volume 8, Issue 1, Page(s) CNC100

    Abstract: Aim: To assess the rate of self-reported concussion in midwestern skiers and snowboarders.: Patients: Recreational skiers and snowboarders between the ages of 14 and 69 years during a single winter ski season (2020-2021) at a ski area in Wisconsin, ... ...

    Abstract Aim: To assess the rate of self-reported concussion in midwestern skiers and snowboarders.
    Patients: Recreational skiers and snowboarders between the ages of 14 and 69 years during a single winter ski season (2020-2021) at a ski area in Wisconsin, USA.
    Methods: Survey study.
    Results: Among this survey population (n = 161), 9.32 and 19.25% reported one or more diagnosed concussion and suspected concussion respectively as a result of a skiing- or snowboarding-related incident. Skiers and snowboarders that self-identified as
    Conclusion: Self-reported concussion history indicates a concussion prevalence that is higher than expected based on previous studies. Participants reported significantly more suspected concussions than diagnosed concussions, indicating a possible issue with underreporting in this population.
    Language English
    Publishing date 2023-01-19
    Publishing country England
    Document type Journal Article
    ISSN 2056-3299
    ISSN (online) 2056-3299
    DOI 10.2217/cnc-2022-0007
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A Comprehensive Review of Lemborexant to Treat Insomnia.

    Fuller, Mitchell C / Carlson, Samuel F / Grant, Chris / Berry, Vince / Ivancich, Marko / Cornett, Elyse M / Kaye, Adam M / Viswanath, Omar / Urits, Ivan / Shekoohi, Sahar / Kaye, Alan D

    Psychopharmacology bulletin

    2024  Volume 54, Issue 1, Page(s) 43–64

    Abstract: Purpose of review: This is a comprehensive review of the literature regarding Lemborexant for the treatment of insomnia. It covers the background and management of insomnia and then reviews the body of existing evidence evaluating the use of Lemborexant ...

    Abstract Purpose of review: This is a comprehensive review of the literature regarding Lemborexant for the treatment of insomnia. It covers the background and management of insomnia and then reviews the body of existing evidence evaluating the use of Lemborexant for this purpose.
    Recent findings: Insomnia leads to significant decreased in quality of life and economic burden due to decreased workplace performance and increased health care costs. Insomnia manifests as a single common pathway of hyperarousal due to a highly complex network of interactions between activation of the sympathetic system and the endocrine system. Lemborexant is a dual orexin 1/2 antagonist that blocks cortical arousal and promotes sleep state transition. Lemborexant was approved by the FDA in 2019 for use in insomnia. It belongs to a class of orexin neuropeptide inhibitors that is growing in popular clinical application.
    Summary: Insomnia is a crippling disorder of the sleep wake cycle that drives significant morbidity and mortality in the United States. It carries a high societal and economic toll due to direct and indirect effects to the healthcare system. Lemborexant is a new addition to the orexin antagonist class of drugs that already includes Almorexant and Suvorexant that has superior pharmacokinetic properties. While Lemborexant does have a mild side effect profile, its clinical safety and efficacy make it a promising insomnia drug of the future.
    MeSH term(s) Humans ; Sleep Initiation and Maintenance Disorders/drug therapy ; Orexins ; Quality of Life ; Pyridines ; Pyrimidines
    Chemical Substances lemborexant (0K5743G68X) ; Orexins ; Pyridines ; Pyrimidines
    Language English
    Publishing date 2024-02-29
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 4113-0
    ISSN 2472-2448 ; 0048-5764 ; 0376-0162
    ISSN (online) 2472-2448
    ISSN 0048-5764 ; 0376-0162
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Structure activity relationships of 5-HT

    Tosh, Dilip K / Calkins, Maggie M / Ivancich, Marko S / Bock, Hailey A / Campbell, Ryan G / Lewicki, Sarah A / Chen, Eric / Gao, Zhan-Guo / McCorvy, John D / Jacobson, Kenneth A

    European journal of medicinal chemistry

    2023  Volume 259, Page(s) 115691

    Abstract: N)-Methanocarba adenosine derivatives were structurally modified to target 5- ... ...

    Abstract (N)-Methanocarba adenosine derivatives were structurally modified to target 5-HT
    MeSH term(s) Adenosine ; Serotonin ; Serotonin Antagonists ; Structure-Activity Relationship ; Receptors, Purinergic P1 ; Receptor, Serotonin, 5-HT2B
    Chemical Substances Adenosine (K72T3FS567) ; Serotonin (333DO1RDJY) ; Serotonin Antagonists ; Receptors, Purinergic P1 ; Receptor, Serotonin, 5-HT2B
    Language English
    Publishing date 2023-07-31
    Publishing country France
    Document type Journal Article
    ZDB-ID 188597-2
    ISSN 1768-3254 ; 0009-4374 ; 0223-5234
    ISSN (online) 1768-3254
    ISSN 0009-4374 ; 0223-5234
    DOI 10.1016/j.ejmech.2023.115691
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Treating Cancer by Targeting Telomeres and Telomerase.

    Ivancich, Marko / Schrank, Zachary / Wojdyla, Luke / Leviskas, Brandon / Kuckovic, Adijan / Sanjali, Ankita / Puri, Neelu

    Antioxidants (Basel, Switzerland)

    2017  Volume 6, Issue 1

    Abstract: Telomerase is expressed in more than 85% of cancer cells. Tumor cells with metastatic potential may have a high telomerase activity, allowing cells to escape from the inhibition of cell proliferation due to shortened telomeres. Human telomerase primarily ...

    Abstract Telomerase is expressed in more than 85% of cancer cells. Tumor cells with metastatic potential may have a high telomerase activity, allowing cells to escape from the inhibition of cell proliferation due to shortened telomeres. Human telomerase primarily consists of two main components: hTERT, a catalytic subunit, and hTR, an RNA template whose sequence is complimentary to the telomeric 5'-dTTAGGG-3' repeat. In humans, telomerase activity is typically restricted to renewing tissues, such as germ cells and stem cells, and is generally absent in normal cells. While hTR is constitutively expressed in most tissue types, hTERT expression levels are low enough that telomere length cannot be maintained, which sets a proliferative lifespan on normal cells. However, in the majority of cancers, telomerase maintains stable telomere length, thereby conferring cell immortality. Levels of hTERT mRNA are directly related to telomerase activity, thereby making it a more suitable therapeutic target than hTR. Recent data suggests that stabilization of telomeric G-quadruplexes may act to indirectly inhibit telomerase action by blocking hTR binding. Telomeric DNA has the propensity to spontaneously form intramolecular G-quadruplexes, four-stranded DNA secondary structures that are stabilized by the stacking of guanine residues in a planar arrangement. The functional roles of telomeric G-quadruplexes are not completely understood, but recent evidence suggests that they can stall the replication fork during DNA synthesis and inhibit telomere replication by preventing telomerase and related proteins from binding to the telomere. Long-term treatment with G-quadruplex stabilizers induces a gradual reduction in the length of the G-rich 3' end of the telomere without a reduction of the total telomere length, suggesting that telomerase activity is inhibited. However, inhibition of telomerase, either directly or indirectly, has shown only moderate success in cancer patients. Another promising approach of targeting the telomere is the use of guanine-rich oligonucleotides (GROs) homologous to the 3' telomere overhang sequence (T-oligos). T-oligos, particularly a specific 11-base oligonucleotide (5'-dGTTAGGGTTAG-3') called T11, have been shown to induce DNA damage responses (DDRs) such as senescence, apoptosis, and cell cycle arrest in numerous cancer cell types with minimal or no cytostatic effects in normal, non-transformed cells. As a result, T-oligos and other GROs are being investigated as prospective anticancer therapeutics. Interestingly, the DDRs induced by T-oligos in cancer cells are similar to the effects seen after progressive telomere degradation in normal cells. The loss of telomeres is an important tumor suppressor mechanism that is commonly absent in transformed malignant cells, and hence, T-oligos have garnered significant interest as a novel strategy to combat cancer. However, little is known about their mechanism of action. In this review, we discuss the current understanding of how T-oligos exert their antiproliferative effects in cancer cells and their role in inhibition of telomerase. We also discuss the current understanding of telomerase in cancer and various therapeutic targets related to the telomeres and telomerase.
    Language English
    Publishing date 2017-02-19
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2704216-9
    ISSN 2076-3921
    ISSN 2076-3921
    DOI 10.3390/antiox6010015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Mechanism of Action of G-Quadruplex-Forming Oligonucleotide Homologous to the Telomere Overhang in Melanoma.

    Chhabra, Gagan / Wojdyla, Luke / Frakes, Mark / Schrank, Zachary / Leviskas, Brandon / Ivancich, Marko / Vinay, Pooja / Ganapathy, Ramesh / Ramirez, Benjamin E / Puri, Neelu

    The Journal of investigative dermatology

    2017  Volume 138, Issue 4, Page(s) 903–910

    Abstract: T-oligo, a guanine-rich oligonucleotide homologous to the 3'-telomeric overhang of telomeres, elicits potent DNA-damage responses in melanoma cells; however, its mechanism of action is largely unknown. Guanine-rich oligonucleotides can form G- ... ...

    Abstract T-oligo, a guanine-rich oligonucleotide homologous to the 3'-telomeric overhang of telomeres, elicits potent DNA-damage responses in melanoma cells; however, its mechanism of action is largely unknown. Guanine-rich oligonucleotides can form G-quadruplexes (G4), which are stabilized by the hydrogen bonding of guanine residues. In this study, we confirmed the G4-forming capabilities of T-oligo using nondenaturing PAGE, nuclear magnetic resonance, and immunofluorescence. Using an anti-G-quadruplex antibody, we showed that T-oligo can form G4 in the nuclei of melanoma cells. Furthermore, using DNase I in a nuclease degradation assay, G4-T-oligo was found to be more stable than single-stranded T-oligo. G4-T-oligo had decreased antiproliferative effects compared with single-stranded T-oligo. However, G4-T-oligo has similar cellular uptake as single-stranded T-oligo, as shown by FACS analysis. Inhibition of JNK, which causes DNA damage-induced apoptosis, partially reversed the antiproliferative activity of T-oligo. T-oligo also inhibited mRNA expression of human telomerase reverse transcriptase, a catalytic subunit of telomerase that was reversed by JNK inhibition. Furthermore, two shelterin complex proteins TRF2/POT1 were found to be up-regulated and bound by T-oligo, suggesting that T-oligo may mediate dissociation of these proteins from the telomere overhang. These studies show that T-oligo can form a G-quadruplex and that the antitumor effects of T-oligo may be mediated through POT1/TRF2 and via human telomerase reverse transcriptase inhibition through JNK activation.
    MeSH term(s) Apoptosis ; Cell Line, Tumor ; DNA Damage ; DNA, Neoplasm/genetics ; G-Quadruplexes ; Gene Expression Regulation, Neoplastic ; Humans ; Melanoma/genetics ; Melanoma/metabolism ; Melanoma/pathology ; Reverse Transcriptase Polymerase Chain Reaction ; Telomere/genetics ; Telomere/metabolism ; Telomeric Repeat Binding Protein 2/biosynthesis ; Telomeric Repeat Binding Protein 2/genetics
    Chemical Substances DNA, Neoplasm ; Telomeric Repeat Binding Protein 2
    Language English
    Publishing date 2017-12-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80136-7
    ISSN 1523-1747 ; 0022-202X
    ISSN (online) 1523-1747
    ISSN 0022-202X
    DOI 10.1016/j.jid.2017.11.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Influence of Asn/His L166 on the hydrogen-bonding pattern and redox potential of the primary donor of purple bacterial reaction centers.

    Ivancich, A / Mattioli, T A

    Biochemistry

    1997  Volume 36, Issue 10, Page(s) 3027–3036

    Abstract: ... for the ND(L166) mutant, the midpoint potential shows a markedly different pH dependency, being 25 mV higher ...

    Abstract The primary electron donor (P) of the photosynthetic reaction center (RC) from the purple bacterium Rhodobacter (Rb.) sphaeroides is constituted of two bacteriochlorophyll molecules in excitonic interaction. The C2 acetyl carbonyl group of one of the two bacteriochlorophyll molecules (PL), the one more closely associated with the L polypeptide subunit, is engaged in a hydrogen bond with histidine L168, while the other pi-conjugated carbonyl groups of P are free from such hydrogen-bonding interactions. The three-dimensional X-ray crystal structures of the RC from several strains of Rb. sphaeroides reveal that asparagine L166 probably interacts indirectly with P through His L168. Such an interaction is expected to modulate the hydrogen bond between P and His L168, a residue which is highly conserved in purple bacteria. RC mutants of Rb. sphaeroides where asparagine L166 was genetically replaced by leucine [NL(L166)], histidine [NH(L166)], and aspartate [ND(L166)] were studied using Fourier transform (FT) Raman spectroscopy. All of these mutations resulted in an increase in the strength of the hydrogen bond between His L168 and the acetyl carbonyl group of P(L), as observed in the FT Raman spectrum, by the 2-4 cm(-1) decrease in vibrational frequency of the 1620 cm(-1) band which has been assigned to this specific acetyl carbonyl group [Mattioli, T. A., Lin, X., Allen, J. P., & Williams, J. C. (1995) Biochemistry 34, 6142-6152]. At pH 8, the NH(L166) mutation showed the greatest change in the P0/P.+ redox midpoint potential (515 mV), increasing it by ca. 30 mV compared to that of wild type (485 mV). A similar increase in P0/P.+ redox midpoint potential for NH(L166) compared to that of wild type is also observed at pH 5, 6, and 9.5. The p0/P.+ midpoint potential of the NL(L166) mutant was comparable to that of wild type at all pH values. In contrast, for the ND(L166) mutant, the midpoint potential shows a markedly different pH dependency, being 25 mV higher than wild type at pH 5 but 20 mV lower than wild type at pH 9.5. The hydrogen bond interactions of the primary electron donor from Rhodospirillum (Rsp.) centenum were determined from the FT Raman vibrational spectrum which exhibits a 1616 cm(-1) band similar to what is seen in the NH(L166) and ND(L166) Rb. sphaeroides mutants. Comparison of the sequence of the L subunit determined for the Rsp. centenum RC with that of other species indicates that positions L166 and L168 are occupied by His residues. The stronger hydrogen bond between the conserved His L168 and the acetyl carbonyl group of P(L), observed in the primary donor of Rsp. centenum and of several bacterial species which are known to possess a histidine residue at the analogous L166 position, is proposed to be due to interactions between these two histidine residues.
    MeSH term(s) Amino Acid Sequence ; Asparagine/metabolism ; Electrochemistry ; Electron Transport ; Histidine/metabolism ; Hydrogen Bonding ; Hydrogen-Ion Concentration ; Light-Harvesting Protein Complexes ; Models, Molecular ; Mutagenesis, Site-Directed ; Mutation ; Oxidation-Reduction ; Photosynthetic Reaction Center Complex Proteins/chemistry ; Photosynthetic Reaction Center Complex Proteins/genetics ; Photosynthetic Reaction Center Complex Proteins/metabolism ; Rhodobacter sphaeroides/chemistry ; Rhodopseudomonas/chemistry ; Sequence Alignment ; Sequence Analysis ; Spectrophotometry ; Spectrum Analysis, Raman
    Chemical Substances Light-Harvesting Protein Complexes ; Photosynthetic Reaction Center Complex Proteins ; Histidine (4QD397987E) ; Asparagine (7006-34-0)
    Language English
    Publishing date 1997-03-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 1108-3
    ISSN 1520-4995 ; 0006-2960
    ISSN (online) 1520-4995
    ISSN 0006-2960
    DOI 10.1021/bi962516u
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  8. Article: Spin label EPR study of lipid solvation of supramolecular photosynthetic protein complexes in thylakoids.

    Ivancich, A / Horváth, L I / Droppa, M / Horváth, G / Farkas, T

    Biochimica et biophysica acta

    1994  Volume 1196, Issue 1, Page(s) 51–56

    Abstract: ... at the hydrophobic surface of membrane proteins. Spin-labelled stearic acid and phosphatidylglycerol exhibited marked ...

    Abstract Lipid-protein association in the chloroplast membrane and its various thylakoid fractions from higher plants, namely pea and maize, rich in Photosystem I (PSI) and Photosystem II (PSII), respectively, were studied using EPR spectroscopy of spin-labelled lipid molecules. All the EPR spectra consisted of two spectral components corresponding to bulk fluid lipids and solvation lipids motionally restricted at the hydrophobic surface of membrane proteins. Spin-labelled stearic acid and phosphatidylglycerol exhibited marked selectivity towards the supramolecular protein complexes of both PSI and PSII although to different extent. In addition, lipid-protein titration experiments are described for partially delipidated PSII-enriched membrane fractions of pea chloroplasts, incorporating unlabelled egg phosphatidylcholine prior to or after the incorporation of spin-labelled lipids. Two sets of solvation sites were resolved by timed labelling experiments and a significant result of these studies was that a well-defined population of solvation sites (approx. 100 mol lipids/820 kDa protein) was rapidly exchanged by laterally diffusing membrane lipids, while other solvation sites (approx. 50 mol lipids/820 kDa protein) were exchanged much slower or not exchanged at all.
    MeSH term(s) Chloroplasts/chemistry ; Electron Spin Resonance Spectroscopy ; Membrane Lipids/chemistry ; Membrane Proteins/chemistry ; Pisum sativum ; Photosynthetic Reaction Center Complex Proteins/chemistry ; Photosystem I Protein Complex ; Photosystem II Protein Complex ; Zea mays
    Chemical Substances Membrane Lipids ; Membrane Proteins ; Photosynthetic Reaction Center Complex Proteins ; Photosystem I Protein Complex ; Photosystem II Protein Complex
    Language English
    Publishing date 1994-11-23
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 60-7
    ISSN 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650 ; 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    ISSN (online) 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650
    ISSN 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    DOI 10.1016/0005-2736(94)90294-1
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