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Determination Of Changes In The Basal Metabolic Rate And Body Composition Of Patients With Chronic Active And Inactive Hepatitis B Infection Using Bioelectrical Impedance Analysis*, Gökhan Unutmaz, Süda Teki̇n Koruk, Cemi̇l Sert Jan 2012

Determination Of Changes In The Basal Metabolic Rate And Body Composition Of Patients With Chronic Active And Inactive Hepatitis B Infection Using Bioelectrical Impedance Analysis*, Gökhan Unutmaz, Süda Teki̇n Koruk, Cemi̇l Sert

Turkish Journal of Medical Sciences

To examine changes in the basal metabolic rate and body composition of patients with chronic inactive and active hepatitis B (HBV) infection as measured using single frequency bioelectrical impedance analysis (BIA) and to investigate the convenience of this method for follow-up with these patients. Materials and methods: Twenty patients with chronic inactive HBV infection, 22 with chronic active HBV infection, and 43 healthy subjects were enrolled in the study. Using single frequency BIA and basal metabolic rate (BMR), the resistance and body composition of all participants were measured. Results: A total of 85 subjects (31 female and 54 male) with …

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Evaluation Of Radiological Findings In 160 Adult Patients With Tuberculous Meningitis, Kadri̇ye Yaşar, Fi̇li̇z Pehli̇vanoğlu, Ahmet Şengöz, Gönül Şengöz Jan 2012

Evaluation Of Radiological Findings In 160 Adult Patients With Tuberculous Meningitis, Kadri̇ye Yaşar, Fi̇li̇z Pehli̇vanoğlu, Ahmet Şengöz, Gönül Şengöz

Turkish Journal of Medical Sciences

To evaluate the radiological findings of 160 adult patients with tuberculous meningitis (TBM). Materials and methods: Using a standard data collection form, 160 patients with TBM who had been followed for 11 years were assessed retrospectively. Cranial imaging results were obtained by computed tomography (CT) and magnetic resonance imaging (MRI), and pulmonary findings were obtained by chest X-ray and CT. Tuberculomas were assessed with a nominal tuberculoma classification index (TCI) scale. Results: Of the 160 patients, 80 were males and the mean age was 32.18 ± 13.62 years (range: 14-78). On admission, 84% were in stages II or III; 27 …

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Clinical Appearance Of Brucellosis In Adults: Fourteen Years Of Experience, Behi̇ce Kurtaran, Aslihan Candevi̇r, Ayşe Seza İnal, Süheyla Kömür, Özay Akyildiz, Neşe Saltoğlu, Hasan Sali̇h Zeki̇ Aksu, Yeşi̇m Taşova Jan 2012

Clinical Appearance Of Brucellosis In Adults: Fourteen Years Of Experience, Behi̇ce Kurtaran, Aslihan Candevi̇r, Ayşe Seza İnal, Süheyla Kömür, Özay Akyildiz, Neşe Saltoğlu, Hasan Sali̇h Zeki̇ Aksu, Yeşi̇m Taşova

Turkish Journal of Medical Sciences

To indicate the clinical course and results of brucellosis in our region during the recent years, and to compare these findings to the literature. Materials and methods: This study was based on a review of the medical records of adult patients older than 14 years who were followed with the diagnosis of brucellosis from March 1997 to October 2010. Results: Included in this analysis were 317 patients, including 136 males (43%), with an average age of 40 ± 17 years. In 66 patients (21%), reproduction of Brucella was identified in the blood. Of the patients, 61% were identified as having …

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In Vitro Efficacy Of Hyperbaric Oxygen Therapy Against Leishmania Tropica Promastigotes And Amastigotes, Özgür Koru, Soykan Özkoç, Kemal Şi̇mşek, Gürkan Mert, Hakan Ay, Seray Töz, Mehmet Tanyüksel Jan 2012

In Vitro Efficacy Of Hyperbaric Oxygen Therapy Against Leishmania Tropica Promastigotes And Amastigotes, Özgür Koru, Soykan Özkoç, Kemal Şi̇mşek, Gürkan Mert, Hakan Ay, Seray Töz, Mehmet Tanyüksel

Turkish Journal of Medical Sciences

Aim: To assess the efficiency of hyperbaric oxygen (HBO) therapy on L. tropica, which is the major causative agent of cutaneous leishmaniasis in Turkey. Materials and methods: The effects of HBO on Leishmania tropica promastigote and amastigote forms were studied at a pressure of 2.5 atmosphere absolute (ata). We examined the cytotoxic effect of HBO on promastigotes using the trypan blue exclusion test and the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) dye-reduction assay. To investigate the effects of HBO treatment on the growth of the promastigotes, HBO-treated and non-HBO-treated cell culture flasks were incubated at 26 °C for 3 days, while the effects …

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Transient Bradycardia In Patients With Crimean-Congo Hemorrhagic Fever, Serpi̇l Erol, Zülal Özkurt, Kemaletti̇n Özden, Mehmet Parlak, Mustafa Kemal Erol Jan 2012

Transient Bradycardia In Patients With Crimean-Congo Hemorrhagic Fever, Serpi̇l Erol, Zülal Özkurt, Kemaletti̇n Özden, Mehmet Parlak, Mustafa Kemal Erol

Turkish Journal of Medical Sciences

To determine the features and clinical course of bradycardia in patients with Crimean-Congo hemorrhagic fever (CCHF). Materials and methods: Between May 2002 and September 2010, a total of 380 patients with CCHF were followed. All patients who had transient bradycardia during this period were included in the study. Results: A total of 14 patients had an episode of bradycardia. All patients were in sinus rhythm. Three patients had clinical symptoms of bradycardia; atropine was administered to them. In the other patients, bradycardia resolved spontaneously. No patient had underlying conditions for bradycardia. Bradycardia appeared 7.0 ± 1.7 days after the first …

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Effects Of Ankaferd Hemostat On The Synovial Fluid Of Patients With Osteoarthritis, Mehmet Aki̇f Öztürk, Zeli̇ha Koçak Tufan, Mehmet Derya Demi̇rağ, İbrahi̇m Celaletti̇n Haznedaroğlu Jan 2012

Effects Of Ankaferd Hemostat On The Synovial Fluid Of Patients With Osteoarthritis, Mehmet Aki̇f Öztürk, Zeli̇ha Koçak Tufan, Mehmet Derya Demi̇rağ, İbrahi̇m Celaletti̇n Haznedaroğlu

Turkish Journal of Medical Sciences

Ankaferd Blood Stopper (ABS) is a novel topical hemostatic agent with antiinfective, wound healing, and antineoplastic properties. In this study, we evaluated the macroscopic and biochemical effects of ABS in the joint fluid of patients with osteoarthritis. Materials and methods: Synovial fluid samples were obtained from 10 patients with osteoarthritis (5 women, 5 men; mean age 57.6 ± 11.2 years). From each patient, 4 mL of synovial fluid was drawn and put into 2 different serum separator tubes, and 1 mL of ABS was added to the first sample and 1 mL of 0.9% saline was added to the second …

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Chest Radiography And Computed Tomography Findings Of Cases With Pandemic Influenza A (H1n1/09) Infection, Pinar Nerci̇s Koşar, Zeli̇ha Koçak Tufan, Eli̇f Ergün, Hasan Yi̇ği̇t, Uğur Koşar, Ali̇ Pekcan Demi̇röz Jan 2012

Chest Radiography And Computed Tomography Findings Of Cases With Pandemic Influenza A (H1n1/09) Infection, Pinar Nerci̇s Koşar, Zeli̇ha Koçak Tufan, Eli̇f Ergün, Hasan Yi̇ği̇t, Uğur Koşar, Ali̇ Pekcan Demi̇röz

Turkish Journal of Medical Sciences

To review the radiological findings of the chests of swine flu patients whose infections were confirmed clinically and/or by laboratory tests. Materials and methods: This study was conducted in the radiology and infectious diseases departments of a tertiary care hospital, Ankara Training and Research Hospital, Ankara, Turkey. The X-ray and thorax computed tomography (CT) findings of swine flu patients were evaluated. Results: Included were 53 cases of swine flu. Thirty-eight of the patients (72%) underwent an initial chest X-ray and 17 (32%) underwent thorax CT examinations. The mean age of the patients was 41 years; 23 (43%) patients were male …

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Characteristics Of Patients Transferred By Air: A Descriptive Epidemiologic Study, Ataman Köse, Beri̇l Köse, Ayça Açikalin Akpinar, Özlem Köksal, Şule Aydin, Erol Armağan Jan 2012

Characteristics Of Patients Transferred By Air: A Descriptive Epidemiologic Study, Ataman Köse, Beri̇l Köse, Ayça Açikalin Akpinar, Özlem Köksal, Şule Aydin, Erol Armağan

Turkish Journal of Medical Sciences

To analyze the characteristics of patients transferred by air ambulance in the eastern Anatolia region of Turkey. Materials and methods: We retrospectively evaluated the records of patients transferred by air ambulance between January 2010 and December 2010. Demographics and medical data of the patients, geographic conditions, and flight duration data were all analyzed. Results: A total of 241 patients were included in the study, of whom 51% were men and 49% were women. The majority of the patients were between 0 and 1 year old (40.2%). In the adult patients, the most commonly seen diagnoses were trauma (31.6%), obstetric problems …

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Do Incubation Temperature, Incubation Time, And Carbon Dioxide Affect The Chromogenic Properties Of Chromagar?, Di̇lek Yeşi̇m Meti̇n, Hüsnü Pullukçu, Süleyha Hi̇lmi̇oğlu Polat, Ramazan İnci̇, Zeki̇ye Emel Tümbay Jan 2012

Do Incubation Temperature, Incubation Time, And Carbon Dioxide Affect The Chromogenic Properties Of Chromagar?, Di̇lek Yeşi̇m Meti̇n, Hüsnü Pullukçu, Süleyha Hi̇lmi̇oğlu Polat, Ramazan İnci̇, Zeki̇ye Emel Tümbay

Turkish Journal of Medical Sciences

On CHROMagar medium Candida species form different colors; thus, the medium enables the differentiation of these species from each other as well as from other Candida species. The aim of this study is to investigate the effect of incubation temperatures, incubation times, and CO_2 on the chromogenic properties of CHROMagar. Materials and methods: A total of 112 strains of Candida spp. were used. A 0.5 McFarland suspension of each strain was inoculated onto CHROMagar with a calibrated loop and incubated at 26 °C and 35 °C for 24-48 h in normal atmosphere and in an atmosphere of 5% CO_2. The …

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Tularemia As A Result Of Outdoor Activities For Children In The Countryside, Şaban Gürcan, Gamze Varol Saraçoğlu, Aynur Karadeni̇zli̇, Emi̇ne Neşe Özkayin, Şemsi̇ Zafer Öztürk, Cemal Çi̇çek, Bi̇nay Vatansever Jan 2012

Tularemia As A Result Of Outdoor Activities For Children In The Countryside, Şaban Gürcan, Gamze Varol Saraçoğlu, Aynur Karadeni̇zli̇, Emi̇ne Neşe Özkayin, Şemsi̇ Zafer Öztürk, Cemal Çi̇çek, Bi̇nay Vatansever

Turkish Journal of Medical Sciences

To investigate the features of a new tularemia outbreak that occurred in the Thrace region. Materials and methods: The research team visited the village after the identification of the index case. Serum and throat samples were taken from 41 villagers who were examined, and environmental samples were taken in order to identify the source of the outbreak. Culture, serology, and molecular methods were used to search for Francisella tularensis in these samples. Results: A total of 8 children were diagnosed with tularemia. The adults and all of the other children were seronegative for tularemia. All of the patients had a …

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Molecular Typing And Sequencing Of Adenovirus Isolated From A Conjunctivitis Outbreak In A Neonatal Intensive Care Unit By Pcr, Candan Çi̇çek, Tamer Şanlidağ, Betül Si̇yah Bi̇lgi̇n, Hüsnü Pullukçu, Si̇nem Akçali, Özge Altun Köroğlu, Mehmet Yalaz, Ni̇lgün Kültürsay Jan 2012

Molecular Typing And Sequencing Of Adenovirus Isolated From A Conjunctivitis Outbreak In A Neonatal Intensive Care Unit By Pcr, Candan Çi̇çek, Tamer Şanlidağ, Betül Si̇yah Bi̇lgi̇n, Hüsnü Pullukçu, Si̇nem Akçali, Özge Altun Köroğlu, Mehmet Yalaz, Ni̇lgün Kültürsay

Turkish Journal of Medical Sciences

We aimed to evaluate the molecular typing of adenovirus isolated during an epidemic at the Ege University Children's Hospital neonatal intensive care unit (NICU). Materials and methods: During the NICU outbreak management, 40 clinical samples (from 15 newborn infants and 25 health care providers) were sent to a microbiology laboratory in viral transport media. All the samples were processed using a direct fluorescent antibody (DFA) test and a shell vial cell culture followed by adenovirus polymerase chain reaction (PCR) and DNA sequencing. PCR and DNA sequencing for adenovirus hexon gene hypervariable regions 1-6 were done after DNA extraction from clinical …

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Minimum Inhibitory And Minimum Bactericidal Concentrations Of Boron Compounds Against Several Bacterial Strains, Murat Tolga Yilmaz Jan 2012

Minimum Inhibitory And Minimum Bactericidal Concentrations Of Boron Compounds Against Several Bacterial Strains, Murat Tolga Yilmaz

Turkish Journal of Medical Sciences

Boron compounds are essential micronutrients for many organisms. However, they negatively affect plant, soil, and water microflora if excessive amounts exist in irrigation water. Therefore, this study aimed to define the minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of boric acid and borax by selecting the bacteria that can survive in all environments. Materials and methods: The antibacterial efficacy of boric acid and borax against several bacterial strains was evaluated 3 times with the macrodilution broth method. Results: The MICs and MBCs of boric acid were obtained as 3.80 mg/mL, 3.80 mg/mL, 7.60 mg/mL, and 7.60 mg/mL against …

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Investigating Virulence Factors Of Clinical Candida Isolates In Relation To Atmospheric Conditions And Genotype, Melek İnci̇, Mustafa Altay Atalay, Ayşe Nedret Koç, Erkan Yula, Ömer Evi̇rgen, Süleyman Durmaz, Gonca Demi̇r Jan 2012

Investigating Virulence Factors Of Clinical Candida Isolates In Relation To Atmospheric Conditions And Genotype, Melek İnci̇, Mustafa Altay Atalay, Ayşe Nedret Koç, Erkan Yula, Ömer Evi̇rgen, Süleyman Durmaz, Gonca Demi̇r

Turkish Journal of Medical Sciences

To investigate some virulence factors in Candida species isolated from patients with suspected invasive fungal infection and to identify their relationship with Candida genotypes. Materials and methods: Overall 45 isolates (20 Candida albicans and 25 non-albicans Candida spp.) genotyped by rep-PCR were included in this study. Virulence factors were studied in both aerobic and anaerobic conditions. In isolates, egg yolk agar was used for determining phospholipase activity, while bovine serum albumin agar was used for proteinase activity, Tween-80 medium for esterase activity, and Sabouraud dextrose agar with sheep blood for hemolysin activity. Biofilm formation was detected by the microplate method. …

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Assessment Of Haematology Patients With Confirmed H1n1 Positivity, Füsun Özdemi̇rkiran, Hüsnü Pullukçu, Candan Çi̇çek, Seçki̇n Çağirgan, Murat Tombuloğlu, Fi̇li̇z Vural, Güray Saydam Jan 2012

Assessment Of Haematology Patients With Confirmed H1n1 Positivity, Füsun Özdemi̇rkiran, Hüsnü Pullukçu, Candan Çi̇çek, Seçki̇n Çağirgan, Murat Tombuloğlu, Fi̇li̇z Vural, Güray Saydam

Turkish Journal of Medical Sciences

H1N1 influenza virus infections in immunosuppressive patients cause complications. Clinical and laboratory findings of H1N1 positive haematology patients were evaluated in this study. Materials and methods: The "H1N1 Swine Influenza Suspicious Case Notification Form and Inpatient Follow-up Form" was prepared for 15 patients with suspected H1N1 infection between October 2009 and May 2010. H1N1 was detected by real-time RT-PCR assay. For all cases medical records were reviewed for clinical, demographic, and haematologic information. Results: H1N1 positivity was confirmed using real-time RT-PCR in 9 out of 15 patients (11 men, 4 women). One of the 9 patients had been followed up …

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Problem Of Antibiotic Resistance In Patients With Acute Bacterial Cystitis And Treatment Options, Ahmet Karakaş, Vedat Turhan Jan 2012

Problem Of Antibiotic Resistance In Patients With Acute Bacterial Cystitis And Treatment Options, Ahmet Karakaş, Vedat Turhan

Turkish Journal of Medical Sciences

No abstract provided.

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A Rare Presentation Of Brucellosis: Polyradiculopathy And Peripheral Neuritis, Günay Ertem, Gülni̇hal Kutlu, Çi̇ğdem Ataman Hati̇poğlu, Cemal Bulut, Ali̇ Pekcan Demi̇röz Jan 2012

A Rare Presentation Of Brucellosis: Polyradiculopathy And Peripheral Neuritis, Günay Ertem, Gülni̇hal Kutlu, Çi̇ğdem Ataman Hati̇poğlu, Cemal Bulut, Ali̇ Pekcan Demi̇röz

Turkish Journal of Medical Sciences

To present 8 patients with polyradiculopathy or polyradiculoneuritis caused by brucellosis. Polyradiculopathy or polyradiculoneuritis are occasional neurological involvements of brucellosis. Materials and methods: The diagnosis was made with clinical, serological and/or cerebrospinal fluid, and electromyographic examinations. Results: All of the patients except one improved quickly after specific antimicrobial treatment. Furthermore, electrophysiological examinations revealed normal findings in 6 patients. Conclusion: This clinical form of brucellosis is mostly reversible if it is diagnosed earlier and treated effectively.

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Laboratory Criteria For Severe Crimean-Congo Haemorrhagic Fever : Letter To The Editor, Mesut Ortatatli, Serdar Ümi̇t Sarici Jan 2012

Laboratory Criteria For Severe Crimean-Congo Haemorrhagic Fever : Letter To The Editor, Mesut Ortatatli, Serdar Ümi̇t Sarici

Turkish Journal of Medical Sciences

No abstract provided.

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Risk Factors And Prognosis In Children Hospitalized Due To Pandemic H1n1 Influenza A Virus Infection In Ankara, Turkey*, Medi̇ne Ayşi̇n Taşar, Yildiz Bi̇lge, Özge Uysal Soyer, Şükran Yildirim, Mustafa Taşar, Fatma İnci̇ Arikan Jan 2012

Risk Factors And Prognosis In Children Hospitalized Due To Pandemic H1n1 Influenza A Virus Infection In Ankara, Turkey*, Medi̇ne Ayşi̇n Taşar, Yildiz Bi̇lge, Özge Uysal Soyer, Şükran Yildirim, Mustafa Taşar, Fatma İnci̇ Arikan

Turkish Journal of Medical Sciences

To describe the demographic characteristics and clinical features in children with influenza A (H1N1) virus infection and to identify risk factors for severe disease or poor prognosis. Following the first tourist-imported case in Turkey on 16 May 2009, the influenza A (H1N1) virus has spread throughout the country. Materials and methods: Children under 18 years of age who were hospitalized for at least 24 h with an influenza-like illness and who had confirmed influenza A (H1N1) virus infection were included in the study. Demographic factors, clinical signs and symptoms, laboratory results, radiographic findings, treatments, and follow-up periods were noted. Results: …

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Serum Interleukin-8 Levels May Predict Relapse In Brucellosis, Nazlim Aktuğ Demi̇r, Onur Ural Jan 2012

Serum Interleukin-8 Levels May Predict Relapse In Brucellosis, Nazlim Aktuğ Demi̇r, Onur Ural

Turkish Journal of Medical Sciences

To investigate whether cytokines are effective in predicting relapses among patients with acute brucellosis. Materials and methods: This trial was conducted in 42 patients who were being followed-up with diagnosis of acute brucellosis. Serum samples were obtained on days 0 and 45. In patients whose clinical symptoms recurred within a year of treatment and exhibited infectious parameters in compliance with brucellosis, a Rivanol standard tube agglutination (STA) test was performed and the diagnosis of relapse was based on brucella immunoglobulin M (IgM). Serum samples were evaluated for various parameters, namely tumor necrosis factor-alpha (TNF-\alpha), interferon-gamma (IFN-\gamma), interleukin 2 (IL-2), IL-4, …

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Infectious Intracranial Aneurysms: Collaboration For Treatment Success, Erin M. Conahan Rn, Bsn, Cnrn Jan 2012

Infectious Intracranial Aneurysms: Collaboration For Treatment Success, Erin M. Conahan Rn, Bsn, Cnrn

Patient Care Services / Nursing

No abstract provided.

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Hiv Rna Suppression And Immune Restoration: Can We Do Better?, Marilia Rita Pinzone, Michelino Di Rosa, Bruno Cacopardo, Giuseppe Nunnari Jan 2012

Hiv Rna Suppression And Immune Restoration: Can We Do Better?, Marilia Rita Pinzone, Michelino Di Rosa, Bruno Cacopardo, Giuseppe Nunnari

Department of Microbiology and Immunology Faculty Papers

HAART has significantly changed the natural history of HIV infection: patients receiving antiretrovirals are usually able to control viremia, even though not all virological responders adequately recover their CD4+ count. The reasons for poor immune restoration are only partially known and they include genetic, demographic and immunologic factors. A crucial element affecting immune recovery is immune activation, related to residual viremia; indeed, a suboptimal virological control (i.e., low levels of plasma HIV RNA) has been related with higher levels of chronic inflammation and all-cause mortality. The sources of residual viremia are not yet completely known, even though the most important …

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Efficient And Robust Rna-Seq Process For Cultured Bacteria And Complex Community Transcriptomes, Georgia Giannoukos, Dawn M. Ciulla, Katherine Huang, Brian J. Haas, Jacques Izard, Joshua Z. Levin, Jonathan Livny, Ashlee M. Earl, Dirk Gevers, Doyle V. Ward, Chad Nusbaum, Bruce W. Birren, Andreas Gnirke Jan 2012

Efficient And Robust Rna-Seq Process For Cultured Bacteria And Complex Community Transcriptomes, Georgia Giannoukos, Dawn M. Ciulla, Katherine Huang, Brian J. Haas, Jacques Izard, Joshua Z. Levin, Jonathan Livny, Ashlee M. Earl, Dirk Gevers, Doyle V. Ward, Chad Nusbaum, Bruce W. Birren, Andreas Gnirke

Department of Food Science and Technology: Faculty Publications

We have developed a process for transcriptome analysis of bacterial communities that accommodates both intact and fragmented starting RNA and combines efficient rRNA removal with strand-specific RNA-seq. We applied this approach to an RNA mixture derived from three diverse cultured bacterial species and to RNA isolated from clinical stool samples. The resulting expression profiles were highly reproducible, enriched up to 40-fold for non-rRNA transcripts, and correlated well with profiles representing undepleted total RNA.

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Chloroviruses: Not Your Everyday Plant Virus, James L. Van Etten, David D. Dunigan Jan 2012

Chloroviruses: Not Your Everyday Plant Virus, James L. Van Etten, David D. Dunigan

Nebraska Center for Virology: Faculty Publications

Viruses infecting higher plants are among the smallest viruses known and typically have four to ten protein-encoding genes. By contrast, many viruses that infect algae (classified in the virus family Phycodnaviridae) are among the largest viruses found to date and have up to 600 protein- encoding genes. This brief review focuses on one group of plaque-forming phycodnaviruses that infect unicellular chlorella-like green algae. The prototype chlorovirus PBCV-1 has more than 400 protein-encoding genes and 11 tRNA genes. About 40% of the PBCV-1 encoded proteins resemble proteins of known function including many that are completely unexpected for a virus. In many …

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Molecular Genetic And Biochemical Characterization Of The Vaccinia Virus I3 Protein, The Replicative Single-Stranded Dna Binding Protein, Matthew D. Greseth, Kathleen A. Boyle, Matthew S. Bluma, Bethany Unger, Matthew S. Wiebe, Jamaria A. Soares-Martins, Nadi T. Wickramasekera, James Wahlberg, Paula Traktman Jan 2012

Molecular Genetic And Biochemical Characterization Of The Vaccinia Virus I3 Protein, The Replicative Single-Stranded Dna Binding Protein, Matthew D. Greseth, Kathleen A. Boyle, Matthew S. Bluma, Bethany Unger, Matthew S. Wiebe, Jamaria A. Soares-Martins, Nadi T. Wickramasekera, James Wahlberg, Paula Traktman

Nebraska Center for Virology: Faculty Publications

Vaccinia virus, the prototypic poxvirus, efficiently and faithfully replicates its approximately 200-kb DNA genome within the cytoplasm of infected cells. This intracellular localization dictates that vaccinia virus encodes most, if not all, of its own DNA replication machinery. Included in the repertoire of viral replication proteins is the I3 protein, which binds to single-stranded DNA (ssDNA) with great specificity and stability and has been presumed to be the replicative ssDNA binding protein (SSB). We substantiate here that I3 colocalizes with bromodeoxyuridine (BrdU)-labeled nascent viral genomes and that these genomes accumulate in cytoplasmic factories that are delimited by membranes derived from …

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Lineage-Specific Differences Between Human And Simian Immunodeficiency Virus Regulation Of Gp120 Trimer Association And Cd4 Binding, Andrés Finzi, Beatriz Pacheco, Shi-Hua Xiang, Marie Pancera, Alon Herschhorn, Liping Wang, Xing Zeng, Anik Desormeaux, Peter D. Kwong, Joseph Sodroski Jan 2012

Lineage-Specific Differences Between Human And Simian Immunodeficiency Virus Regulation Of Gp120 Trimer Association And Cd4 Binding, Andrés Finzi, Beatriz Pacheco, Shi-Hua Xiang, Marie Pancera, Alon Herschhorn, Liping Wang, Xing Zeng, Anik Desormeaux, Peter D. Kwong, Joseph Sodroski

Nebraska Center for Virology: Faculty Publications

Metastable conformations of the gp120 and gp41 envelope glycoproteins of human immunodeficiency virus type 1 (HIV-1) and simian immunodeficiency virus (SIV) must be maintained in the unliganded state of the envelope glycoprotein trimer. Binding of gp120 to the primary receptor, CD4, triggers the transition to an open conformation of the trimer, promoting interaction with the CCR5 chemokine receptor and ultimately leading to gp41-mediated virus-cell membrane fusion and entry. Topological layers in the gp120 inner domain contribute to gp120-trimer association in the unliganded state and to CD4 binding. Here we describe similarities and differences between HIV-1 and SIVmac gp120. In both …

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Subunit Organization Of The Membrane-Bound Hiv-1 Envelope Glycoprotein Trimer, Youdong Mao, Liping Wang, Christopher Gu, Alon Herschhorn, Shi-Hua Xiang, Hillel Haim, Xinzhen Yang, Joseph Sodroski Jan 2012

Subunit Organization Of The Membrane-Bound Hiv-1 Envelope Glycoprotein Trimer, Youdong Mao, Liping Wang, Christopher Gu, Alon Herschhorn, Shi-Hua Xiang, Hillel Haim, Xinzhen Yang, Joseph Sodroski

Nebraska Center for Virology: Faculty Publications

The trimeric human immunodeficiency virus type 1 (HIV-1) envelope glycoprotein (Env) spike is a molecular machine that mediates virus entry into host cells and is the sole target for virus-neutralizing antibodies. The mature Env spike results from cleavage of a trimeric gp160 precursor into three gp120 and three gp41 subunits. Here we describe an ~11-Å cryo-EM structure of the trimeric HIV-1 Env precursor in its unliganded state. The three gp120 and three gp41 subunits form a cage-like structure with an interior void surrounding the trimer axis. Interprotomer contacts are limited to the gp41 transmembrane region, the torus-like gp41 ectodomain, and …

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Comparative Analysis Of The Fusion Efficiency Elicited By The Envelope Glycoprotein V1–V5 Regions Derived From Human Immunodeficiency Virus Type 1 Transmitted Perinatally, Hongyan Guo, Levon Abrahamyan, Chang Liu, Mackenzie Waltke, Yunqi Geng, Qimin Chen, Charles Wood, Xiaohong Kong Jan 2012

Comparative Analysis Of The Fusion Efficiency Elicited By The Envelope Glycoprotein V1–V5 Regions Derived From Human Immunodeficiency Virus Type 1 Transmitted Perinatally, Hongyan Guo, Levon Abrahamyan, Chang Liu, Mackenzie Waltke, Yunqi Geng, Qimin Chen, Charles Wood, Xiaohong Kong

Nebraska Center for Virology: Faculty Publications

Understanding the properties of viruses preferentially establishing infection during perinatal transmission of human immunodeficiency virus type 1 (HIV-1) is critical for the development of effective measures to prevent transmission. A previous study demonstrated that the newly transmitted viruses (in infants) of chronically infected mother–infant pairs (MIPs) were fitter in terms of growth, which was imparted by their envelope (Env) glycoprotein V1–V5 regions, than those in the corresponding chronically infected mothers. In order to investigate whether the higher fitness of transmitted viruses was conferred by their higher entry efficiency directed by the V1–V5 regions during perinatal transmission, the fusogenicity of Env …

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Antibody Responses To Lytic And Latent Human Herpesvirus 8 Antigens Among Hiv-Infected Patients In Central China, Tiejun Zhang, Na He, Yingying Ding, Qingwu Jiang, Charles Wood Jan 2012

Antibody Responses To Lytic And Latent Human Herpesvirus 8 Antigens Among Hiv-Infected Patients In Central China, Tiejun Zhang, Na He, Yingying Ding, Qingwu Jiang, Charles Wood

Nebraska Center for Virology: Faculty Publications

Human herpesvirus 8 (HHV8) is an important opportunistic infection of HIV/AIDS. However, very little is known about antibody seropositivities to HHV8 lytic and latent antigens among HIVinfected patients in China. Therefore, a cross-sectional study was conducted to explore HHV8 serostatus among 316 HIV-infected patients in a rural area of central China. The antibody seropositivity to HHV8 ORF65 (lytic) and LANA (latent) antigens was 12.7% and 10.4%, respectively. Patients who were naïve to antiretroviral therapy (ART) were more likely to be seropositive for antibodies to ORF65 (OR: 3.79; 95% CI: 1.71–8.42) and LANA (OR: 3.77; 95% CI: 1.55–9.14) than patients receiving …

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Heme Oxygenase-1 Regulates The Immune Response To Influenza Virus Infection And Vaccination In Aged Mice, Nathan W. Cummins, Eric A. Weaver, Shannon M. May, Anthony J. Croatt, Oded Foreman, Richard B. Kennedy, Gregory A. Polan, Michael A. Barry, Karl A. Nath, Andrew D. Badley Jan 2012

Heme Oxygenase-1 Regulates The Immune Response To Influenza Virus Infection And Vaccination In Aged Mice, Nathan W. Cummins, Eric A. Weaver, Shannon M. May, Anthony J. Croatt, Oded Foreman, Richard B. Kennedy, Gregory A. Polan, Michael A. Barry, Karl A. Nath, Andrew D. Badley

Nebraska Center for Virology: Faculty Publications

Underlying mechanisms of individual variation in severity of influenza infection and response to vaccination are poorly understood. We investigated the effect of reduced heme oxygenase-1 (HO-1) expression on vaccine response and outcome of influenza infection. HO-1-deficient and wild-type (WT) mice (kingdom, Animalia; phylum, Chordata; genus/species, Mus musculus) were infected with influenza virus A/PR/8/34 with or without prior vaccination with an adenoviral-based influenza vaccine. A genome-wide association study evaluated the expression of single-nucleotide polymorphisms (SNPs) in the HO-1 gene and the response to influenza vaccination in healthy humans. HO-1-deficient mice had decreased survival after influenza infection compared to WT mice (median …

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Copper–Zinc Superoxide Dismutase-Deficient Mice Show Increased Susceptibility To Experimental Autoimmune Encephalomyelitis Induced With Myelin Oligodendrocyte Glycoprotein 35–55, Chandirasegara Massilamany, Arunakumar Gangaplara, Heejeong Kim, Charlotte Standord, Govardhan Rathnaiah, David Steffen, Jaekwon Lee, Jay Reddy Jan 2012

Copper–Zinc Superoxide Dismutase-Deficient Mice Show Increased Susceptibility To Experimental Autoimmune Encephalomyelitis Induced With Myelin Oligodendrocyte Glycoprotein 35–55, Chandirasegara Massilamany, Arunakumar Gangaplara, Heejeong Kim, Charlotte Standord, Govardhan Rathnaiah, David Steffen, Jaekwon Lee, Jay Reddy

School of Veterinary and Biomedical Sciences: Faculty Publications

In this report, we have addressed the role of copper–zinc superoxide dismutase (SOD1) deficiency in the mediation of central nervous system autoimmunity. We demonstrate that SOD1-deficient C57Bl/6 mice develop more severe autoimmune encephalomyelitis induced with myelin oligodendrocyte glycoprotein (MOG) 35–55, compared with wild type mice. This alteration in the disease phenotype was not due to aberrant expansion of MOG-specific T cells nor their ability to produce inflammatory cytokines; rather lymphocytes generated in SOD1-deficient mice were more prone to spontaneous cell death when compared with their wild type littermate controls. The data point to a role for SOD1 in the maintenance …

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