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2.
Biology (Basel) ; 10(3)2021 Mar 08.
Artigo em Inglês | MEDLINE | ID: mdl-33800496

RESUMO

Siliceous planktonic species of the phyla Retaria and Cercozoa were investigated from the surface to a 200 m depth around the eastern Indian Ocean (80.00°-96.10° E, 10.08° N-6.00° S) during a 2-month cruise (10 April-13 May 2014). These species are commonly referred to as Radiolarians and are found in all of the world's oceans; however, this is a detailed investigation of the species' diversity in the eastern Indian Ocean. Samples were collected from the eastern Indian Ocean using a plankton towing net during a vertical haul from 44 sampling stations, which resulted in 168 taxa, including 60 species that were newly recorded in the study area. The main purpose of this work was to identify members of the phyla Retaria and Cercozoa and their distribution in the eastern Indian Ocean. The species' morphology, identification, notes, and new geographical records are briefly described.

3.
Inhal Toxicol ; 32(5): 189-199, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32448007

RESUMO

Objective: The lungs are uniquely exposed to the external environment. Sand and dust exposures in desert regions are common among deployed soldiers. A significant number of Veterans deployed to the Middle East report development of respiratory disorders and diseases.Materials and methods: Sand collected from Fallujah, Iraq and Kandahar, Afghanistan combat zones was analyzed and compared to a sand sample collected from an historic United States (U.S.) battle region (Fort Johnson, James Island, SC, Civil War battle site). Sand samples were analyzed to determine the physical and elemental characteristics that may have the potential to contribute to development of respiratory disease.Results: Using complementary scanning electron microscopy (SEM) imaging and analysis, and inductively coupled plasma mass spectrometry (ICP-MS), it was determined that Iraq sand contained elevated levels of calcium and first row transition metals versus Afghanistan and U.S. sand. Iraq sand particle texture was smooth and round, and particles were considerably smaller than Afghanistan sand. Afghanistan sand was elevated in rare earth metals versus Iraq or U.S. sands and had sharp edge features and larger particle size than Iraq sand.Conclusions: These data demonstrate significant differences in Iraq and Afghanistan sand particle size and characteristics. Middle East sands contained elevated levels of elements that have been associated with respiratory disease versus control site sand, suggesting the potential of sand/dust storm exposure to promote adverse respiratory symptoms. Data also demonstrate the potential for variation based on geographical region or site of exposure. The data generated provide baseline information that will be valuable in designing future exposure studies.


Assuntos
Metais/análise , Areia/química , Afeganistão , Conflitos Armados , Iraque , Tamanho da Partícula , South Carolina , Propriedades de Superfície
4.
Biomed Mater Eng ; 30(1): 111-123, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30562893

RESUMO

BACKGROUND: Biocompatible hydrogel systems with tunable mechanical properties have been reported to influence the behavior and differentiation of mesenchymal stem cells (MSCs). OBJECTIVE: To develop a functionalized hydrogel system with well-defined chemical structures and tunable mechanical property for regulation of stem cell differentiation. METHODS: An in situ-forming hydrogel system is developed by crosslinking vinyl sulfone functionalized polyamidoamine (PAMAM) dendrimer and multi-armed thiolated polyethylene glycol (PEG) through a thiol-ene Michael addition in aqueous conditions. The viability and differentiation of MSCs in hydrogels of different stiffness are conducted for 21 days under corresponding induction media. RESULTS: MSCs are viable in synthesized hydrogels after 48 hours of culture. By varying the concentrations of PAMAM dendrimer and PEG, hydrogels of different gelation time and stiffness are achieved. The MSC differentiation indicates that more osteogenic differentiation is observed in hard gel (5,663 Pa) and more adipogenic differentiation is observed in soft gel (77 Pa) in addition to the differentiation caused by each individual induction media during the process of culture. CONCLUSIONS: A biocompatible in situ-forming hydrogel system is successfully synthesized. This hydrogel system has shown influences on differentiation of MSCs and may potentially be important in developing therapeutic strategies in medical applications.


Assuntos
Materiais Biocompatíveis/química , Diferenciação Celular , Dendrímeros/química , Células-Tronco Mesenquimais/citologia , Polietilenoglicóis/química , Animais , Células Cultivadas , Elasticidade , Hidrogéis/química , Teste de Materiais , Ratos
5.
Front Public Health ; 6: 123, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29770320

RESUMO

BACKGROUND: Evidence shows that subacute mental health recovery occurs best when a person remains active within the community and fulfils meaningful and satisfying roles of their choosing. Several residential care services that incorporate these values have been established in Australia and overseas. AIMS: This study describes (a) the development of an evaluation framework for a new subacute residential mental health recovery service in regional Australia and (b) reports on the formative evaluation outcomes. METHODS: Continuous quality improvement and participatory research approaches informed all stages of the development of the evaluation framework. A program logic was established and subsequently tested for practicability. The resultant logic utilizes the Scottish Recovery Indicator 2 (SRI 2) service development tool, Individual Recovery Plans (IRPs), and the impact assessment of the service on psychiatric inpatient admissions (reported separately). RESULTS: Service strengths included a recovery-focused practice that identifies and addresses the basic needs of residents (consumers). The consumers of the service were encouraged to develop their own goals and self-manage their recovery plans. The staff of the service were identified as working effectively in the context of the recovery process; the staff were seen as supported and valued. Areas for improvement included more opportunities for self-management for residents and more feedback from residents and carers.

6.
Mar Drugs ; 16(1)2018 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-29342840

RESUMO

Marine biotoxin-contaminated seafood has caused thousands of poisonings worldwide this century. Given these threats, there is an increasing need for improved technologies that can be easily integrated into coastal monitoring programs. This study evaluates approaches for monitoring toxins associated with recurrent toxin-producing Alexandrium and Dinophysis blooms on Long Island, NY, USA, which cause paralytic and diarrhetic shellfish poisoning (PSP and DSP), respectively. Within contrasting locations, the dynamics of pelagic Alexandrium and Dinophysis cell densities, toxins in plankton, and toxins in deployed blue mussels (Mytilus edulis) were compared with passive solid-phase adsorption toxin tracking (SPATT) samplers filled with two types of resin, HP20 and XAD-2. Multiple species of wild shellfish were also collected during Dinophysis blooms and used to compare toxin content using two different extraction techniques (single dispersive and double exhaustive) and two different toxin analysis assays (liquid chromatography/mass spectrometry and the protein phosphatase inhibition assay (PP2A)) for the measurement of DSP toxins. DSP toxins measured in the HP20 resin were significantly correlated (R² = 0.7-0.9, p < 0.001) with total DSP toxins in shellfish, but were detected more than three weeks prior to detection in deployed mussels. Both resins adsorbed measurable levels of PSP toxins, but neither quantitatively tracked Alexandrium cell densities, toxicity in plankton or toxins in shellfish. DSP extraction and toxin analysis methods did not differ significantly (p > 0.05), were highly correlated (R² = 0.98-0.99; p < 0.001) and provided complete recovery of DSP toxins from standard reference materials. Blue mussels (Mytilus edulis) and ribbed mussels (Geukensia demissa) were found to accumulate DSP toxins above federal and international standards (160 ng g-1) during Dinophysis blooms while Eastern oysters (Crassostrea virginica) and soft shell clams (Mya arenaria) did not. This study demonstrated that SPATT samplers using HP20 resin coupled with PP2A technology could be used to provide early warning of DSP, but not PSP, events for shellfish management.


Assuntos
Dinoflagellida/química , Toxinas Marinhas/química , Frutos do Mar/análise , Frutos do Mar/parasitologia , Animais , Cromatografia Líquida/métodos , Monitoramento Ambiental/métodos , Mytilus edulis/parasitologia , Alimentos Marinhos/análise , Alimentos Marinhos/parasitologia , Água do Mar/parasitologia , Espectrometria de Massas em Tandem/métodos
7.
Harmful Algae ; 68: 206-216, 2017 09.
Artigo em Inglês | MEDLINE | ID: mdl-28962981

RESUMO

This study confirms the presence of the toxigenic benthic dinoflagellates Gambierdiscus belizeanus and Ostreopsis spp. in the central Red Sea. To our knowledge, this is also the first report of these taxa in coastal waters of Saudi Arabia, indicating the potential occurrence of ciguatera fish poisoning (CFP) in that region. During field investigations carried out in 2012 and 2013, a total of 100 Turbinaria and Halimeda macroalgae samples were collected from coral reefs off the Saudi Arabian coast and examined for the presence of Gambierdiscus and Ostreopsis, two toxigenic dinoflagellate genera commonly observed in coral reef communities around the world. Both Gambierdiscus and Ostreopsis spp. were observed at low densities (<200 cells g-1 wet weight algae). Cell densities of Ostreopsis spp. were significantly higher than Gambierdiscus spp. at most of the sampling sites, and abundances of both genera were negatively correlated with seawater salinity. To assess the potential for ciguatoxicity in this region, several Gambierdiscus isolates were established in culture and examined for species identity and toxicity. All isolates were morphologically and molecularly identified as Gambierdiscus belizeanus. Toxicity analysis of two isolates using the mouse neuroblastoma cell-based assay for ciguatoxins (CTX) confirmed G. belizeanus as a CTX producer, with a maximum toxin content of 6.50±1.14×10-5pg P-CTX-1 eq. cell-1. Compared to Gambierdiscus isolates from other locations, these were low toxicity strains. The low Gambierdiscus densities observed along with their comparatively low toxin contents may explain why CFP is unidentified and unreported in this region. Nevertheless, the presence of these potentially toxigenic dinoflagellate species at multiple sites in the central Red Sea warrants future study on their possible effects on marine food webs and human health in this region.


Assuntos
Ciguatera/parasitologia , Dinoflagellida/fisiologia , Ciguatoxinas/toxicidade , Dinoflagellida/citologia , Dinoflagellida/ultraestrutura , Geografia , Oceano Índico , Salinidade , Alga Marinha/fisiologia , Análise de Sequência de DNA
9.
Environ Toxicol Chem ; 35(1): 6-13, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26771345

RESUMO

In this Focus article, the authors ask a seemingly simple question: Are harmful algal blooms (HABs) becoming the greatest inland water quality threat to public health and aquatic ecosystems? When HAB events require restrictions on fisheries, recreation, and drinking water uses of inland water bodies significant economic consequences result. Unfortunately, the magnitude, frequency, and duration of HABs in inland waters are poorly understood across spatiotemporal scales and differentially engaged among states, tribes, and territories. Harmful algal bloom impacts are not as predictable as those from conventional chemical contaminants, for which water quality assessment and management programs were primarily developed, because interactions among multiple natural and anthropogenic factors determine the likelihood and severity to which a HAB will occur in a specific water body. These forcing factors can also affect toxin production. Beyond site-specific water quality degradation caused directly by HABs, the presence of HAB toxins can negatively influence routine surface water quality monitoring, assessment, and management practices. Harmful algal blooms present significant challenges for achieving water quality protection and restoration goals when these toxins confound interpretation of monitoring results and environmental quality standards implementation efforts for other chemicals and stressors. Whether HABs presently represent the greatest threat to inland water quality is debatable, though in inland waters of developed countries they typically cause more severe acute impacts to environmental quality than conventional chemical contamination events. The authors identify several timely research needs. Environmental toxicology, environmental chemistry, and risk-assessment expertise must interface with ecologists, engineers, and public health practitioners to engage the complexities of HAB assessment and management, to address the forcing factors for HAB formation, and to reduce the threats posed to inland surface water quality.


Assuntos
Ecossistema , Saúde Ambiental , Proliferação Nociva de Algas , Saúde Pública , Qualidade da Água , Mudança Climática , Previsões , Água Doce , Humanos , Urbanização , Abastecimento de Água
10.
Harmful Algae ; 57(Pt B): 45-50, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-28918891

RESUMO

Clinical cases of paralytic shellfish poisoning (PSP) are common in Alaska, and result from human consumption of shellfish contaminated with saxitoxin (STX) and its analogues. Diagnosis of PSP is presumptive and based on recent ingestion of shellfish and presence of manifestations consistent with symptoms of PSP; diagnosis is confirmed by detection of paralytic shellfish toxins in a clinical specimen or food sample. A clinical diagnostic analytical method using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was used to evaluate the diagnosis of saxitoxin-induced PSP (STX-PSP) in 11 Alaskan patients using urine specimens collected between June 2010 and November 2011. Concentrations of urinary STX were corrected for creatinine concentrations to account for dilution or concentration of urine from water intake or restriction, respectively. Of the 11 patients with suspected PSP, four patients were confirmed to have STX-PSP by urine testing (24-364ng STX/g creatinine). Five patients had clinical manifestations of PSP though no STX was detected in their urine. Two patients were ruled out for STX-PSP based on non-detected urinary STX and the absence of clinical findings. Results revealed that dysphagia and dysarthria may be stronger indicators of PSP than paresthesia and nausea, which are commonly used to clinically diagnose patients with PSP. PSP can also occur from exposure to a number of STX congeners, such as gonyautoxins, however their presence in urine was not assessed in this investigation. In addition, meal remnants obtained from six presumptive PSP cases were analyzed using the Association of Official Analytical Chemists' mouse bioassay. All six samples tested positive for PSP toxins. In the future, the clinical diagnostic method can be used in conjunction with the mouse bioassay or HPLC-MS/MS to assess the extent of STX-PSP in Alaska where it has been suggested that PSP is underreported.


Assuntos
Testes Diagnósticos de Rotina/métodos , Intoxicação por Frutos do Mar/diagnóstico , Intoxicação por Frutos do Mar/patologia , Urinálise , Alaska , Animais , Bioensaio , Cromatografia Líquida de Alta Pressão , Testes Diagnósticos de Rotina/normas , Humanos , Camundongos , Saxitoxina/análise , Espectrometria de Massas em Tandem , Testes de Toxicidade
11.
Reg Anesth Pain Med ; 41(1): 28-36, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26650426

RESUMO

BACKGROUND: Epidural analgesia provides good pain control after many postoperative procedures, but it can lead to complications, has some contraindications, and occasionally fails. Intravenous lidocaine infusion has been suggested as an alternative. We assessed, in our clinical practice, the effects of perioperative intravenous lidocaine infusion compared with epidural analgesia for major abdominal surgery. METHODS: We conducted a retrospective review of patients who had received intravenous lidocaine (1 mg/kg per hour) perioperatively after a major abdominal surgery. We matched them with patients who had received epidural analgesia. We tested a joint hypothesis of noninferiority of lidocaine infusion to epidural analgesia in postoperative pain scores and opioid consumption. We assigned a noninferiority margin of 1 point (on an 11-point numerical rating scale) difference in pain and a ratio [mean (lidocaine) / mean (epidural)] of 1.2 in opioid consumption, respectively. RESULTS: Two hundred sixteen patients (108 in each group) were analyzed. Intravenous lidocaine was not inferior to epidural analgesia with respect to pain scores. Lidocaine infusion was inferior to epidural analgesia with respect to opioid consumption. Patients in the lidocaine group had fewer episodes of hypotension and less postoperative nausea and vomiting, pruritus, and urinary retention. Patients receiving lidocaine also had earlier urinary catheter removal and earlier first gastrointestinal function. Daily mental status assessment was similar between the 2 groups. CONCLUSIONS: Patients who received systemic lidocaine infusions with the addition of PRN (as needed) opioids administered for breakthrough pain did not have clinically significant differences in pain scores on postoperative day 2 and beyond. Intravenous lidocaine infusion in major abdominal surgery was inferior to epidural analgesia with respect to opioid consumption. However, lidocaine was associated with improvements in several important aspects of recovery.


Assuntos
Abdome/cirurgia , Analgesia Epidural/métodos , Anestésicos Locais/administração & dosagem , Dor Pós-Operatória/diagnóstico , Dor Pós-Operatória/prevenção & controle , Adulto , Idoso , Analgésicos Opioides/administração & dosagem , Feminino , Humanos , Infusões Intravenosas , Lidocaína/administração & dosagem , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
12.
PLoS One ; 10(4): e0124148, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25894567

RESUMO

Diarrhetic Shellfish Poisoning (DSP) is a globally significant human health syndrome most commonly caused by dinoflagellates within the genus Dinophysis. While blooms of harmful algae have frequently been linked to excessive nutrient loading, Dinophysis is a mixotrophic alga whose growth is typically associated with prey availability. Consequently, field studies of Dinophysis and nutrients have been rare. Here, the temporal dynamics of Dinophysis acuminata blooms, DSP toxins, and nutrients (nitrate, ammonium, phosphate, silicate, organic compounds) were examined over four years within two New York estuaries (Meetinghouse Creek and Northport Bay). Further, changes in the abundance and toxicity of D. acuminata were assessed during a series of nutrient amendment experiments performed over a three year period. During the study, Dinophysis acuminata blooms exceeding one million cells L-1 were observed in both estuaries. Highly significant (p<0.001) forward stepwise multivariate regression models of ecosystem observations demonstrated that D. acuminata abundances were positively dependent on multiple environmental parameters including ammonium (p = 0.007) while cellular toxin content was positively dependent on ammonium (p = 0.002) but negatively dependent on nitrate (p<0.001). Nitrogen- (N) and phosphorus- (P) containing inorganic and organic nutrients significantly enhanced D. acuminata densities in nearly all (13 of 14) experiments performed. Ammonium significantly increased cell densities in 10 of 11 experiments, while glutamine significantly enhanced cellular DSP content in 4 of 5 experiments examining this compound. Nutrients may have directly or indirectly enhanced D. acuminata abundances as densities of this mixotroph during experiments were significantly correlated with multiple members of the planktonic community (phytoflagellates and Mesodinium). Collectively, this study demonstrates that nutrient loading and more specifically N-loading promotes the growth and toxicity of D. acuminata populations in coastal zones.


Assuntos
Dinoflagellida/crescimento & desenvolvimento , Dinoflagellida/metabolismo , Ecossistema , Estuários , Alimentos , Toxinas Marinhas/química , Nitrogênio/metabolismo , Humanos
13.
J Cardiothorac Vasc Anesth ; 28(5): 1302-6, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25281046

RESUMO

OBJECTIVES: To prevent urinary retention, urinary catheters commonly are removed only after thoracic epidural discontinuation after thoracotomy. However, prolonged catheterization increases the risk of infection. The purpose of this study was to determine the rates of urinary retention and catheter-associated infection after early catheter removal. DESIGN: This study described a prospective trial instituting an early urinary catheter removal protocol compared with a historic control group of patients. SETTING: The protocol was instituted at a single, academic thoracic surgery unit. PARTICIPANTS: The study group was comprised of patients undergoing surgery requiring thoracotomy who received an intraoperative epidural for postoperative pain control. INTERVENTIONS: An early urinary catheter removal protocol was instituted prospectively, with all catheters removed on or before postoperative day 2. Urinary retention was determined by bladder ultrasound and treated with recatheterization. MEASUREMENTS AND MAIN RESULTS: The primary outcomes were urinary retention rate, defined as bladder volume>400 mL, and urinary tract infection rate. Results were compared with a retrospective cohort of 210 consecutive patients who underwent surgery before protocol initiation. Among the 101 prospectively enrolled patients, urinary retention rate was higher (26.7% v 12.4%, p = 0.003), while urinary tract infection rate improved moderately (1% v 3.8%, p = 0.280). CONCLUSIONS: Early removal of urinary catheters with thoracic epidurals in place is associated with a high incidence of urinary retention. However, an early catheter removal protocol may play a role in a multifaceted approach to reducing the incidence of catheter-associated urinary tract infections.


Assuntos
Analgesia Epidural/métodos , Remoção de Dispositivo/métodos , Toracotomia , Cateteres Urinários , Idoso , Analgesia Epidural/tendências , Estudos de Coortes , Remoção de Dispositivo/tendências , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Toracotomia/efeitos adversos , Toracotomia/tendências , Fatores de Tempo , Cateteres Urinários/microbiologia , Cateteres Urinários/tendências
14.
Mar Pollut Bull ; 77(1-2): 210-9, 2013 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-24210944

RESUMO

Ciguatera fish poisoning (CFP) is known to be caused by the ciguatoxins from the dinoflagellate genus Gambierdiscus, however, there is the potential for other toxins such as okadaic acid and dinophysistoxins from the genus Prorocentrum, and palytoxin from the genus Ostreopsis, to contaminate seafood. These genera may also be indicators of ecosystem health and potentially impact on coral reef ecosystems and the role they may play in the succession of coral to macroalgae dominated reefs has not been researched. Sixteen GBR field sites spanning inshore, mid-lagoon and outer lagoon (offshore) regions were studied. Samples were collected from September 2006 to December 2007 and abundance of benthic dinoflagellates on different host macroalgae and concentration of nutrients present in the water column were determined. The maximum abundance of Prorocentrum, Ostreopsis and Gambierdiscus found was 112, 793 and 50 cells per gram wet weight of host macroalgae, respectively. The average level of Dissolved Inorganic Nitrogen (DIN) in the water column across all sites (0.03 mg/L) was found to be more than double the threshold critical value (0.013 mg/L) for healthy coral reefs. Compared to a previous study 1984, there is evidence of a major shift in the distribution and abundance of these dinoflagellates. Inshore reefs have either of Prorocentrum (as at Green Island) or Ostreopsis (as at Magnetic Island) dominating the macroalgal surface niche which was once dominated by Gambierdiscus, whilst at offshore regions Gambierdiscus is still dominant. This succession may be linked to the ongoing eutrophication of the GBR lagoon and have consequences for the sources of toxins for ongoing cases of ciguatera.


Assuntos
Ciguatoxinas/análise , Recifes de Corais , Dinoflagellida/crescimento & desenvolvimento , Poluentes Químicos da Água/análise , Animais , Monitoramento Ambiental , Eutrofização
15.
PLoS One ; 7(12): e50265, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23227162

RESUMO

Two major hurdles need to be surmounted for cell therapy for diabetes: (i) allo-immune rejection of grafted pancreatic islets, or stem/precursor cell-derived insulin-secreting cells; and (ii) continuing auto-immunity against the diabetogenic endogenous target antigen. Nanotherapeutics offer a novel approach to overcome these problems and here we ask if creation of "stealth" islets encapsulated within a thin cage of pegylated material of 100-200 nanometers thick provides a viable option for islet transplantation. The aims of this study were to test islet viability and functionality following encapsulation within the pegylated cage, and functional efficacy in vivo in terms of graft-derived control of normoglycemia in diabetic mice. We first demonstrated that pegylation of the islet surface, plus or minus nanoparticles, improved long-term islet viability in vitro compared to non-pegylated (naked) control islets. Moreover, pegylation of the islets with nanoparticles was compatible with glucose-stimulated insulin secretion and insulin biogenesis. We next looked for functionality of the created "stealth" DBA/2 (H-2(d)) islets in vivo by comparing glycemic profiles across 4 groups of streptozotozin-induced diabetic C57BL/6 (H-2(b)) recipients of (i) naked islets; (ii) pegylated islets; (iii) pegylated islets with nanoparticles (empty); and (iv) pegylated islets with nanoparticles loaded with a cargo of leukemia inhibitory factor (LIF), a factor both promotes adaptive immune tolerance and regulates pancreatic ß cell mass. Without any other treatment, normoglycemia was lost after 17 d (+/-7.5 d) in control group. In striking contrast, recipients in groups (ii), (iii), and (iv) showed long-term (>100 d) normoglycemia involving 30%; 43%, and 57% of the recipients in each respective group. In conclusion, construction of "stealth" islets by pegylation-based nanotherapeutics not only supports islet structure and function, but also effectively isolates the islets from immune-mediated destruction. The added value of nanoparticles to deliver immune modulators plus growth factors such as LIF expands the potential of this novel therapeutic approach to cell therapy for diabetes.


Assuntos
Glicemia/metabolismo , Complexo Principal de Histocompatibilidade/imunologia , Nanomedicina , Transplante de Pâncreas , Pâncreas/imunologia , Polietilenoglicóis/administração & dosagem , Animais , Imuno-Histoquímica , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Endogâmicos DBA , Microscopia Eletrônica de Varredura
16.
PLoS One ; 6(3): e17394, 2011 Mar 10.
Artigo em Inglês | MEDLINE | ID: mdl-21423740

RESUMO

Sentinel species such as bottlenose dolphins (Tursiops truncatus) can be impacted by large-scale mortality events due to exposure to marine algal toxins. In the Sarasota Bay region (Gulf of Mexico, Florida, USA), the bottlenose dolphin population is frequently exposed to harmful algal blooms (HABs) of Karenia brevis and the neurotoxic brevetoxins (PbTx; BTX) produced by this dinoflagellate. Live dolphins sampled during capture-release health assessments performed in this region tested positive for two HAB toxins; brevetoxin and domoic acid (DA). Over a ten-year study period (2000-2009) we have determined that bottlenose dolphins are exposed to brevetoxin and/or DA on a nearly annual basis (i.e., DA: 2004, 2005, 2006, 2008, 2009; brevetoxin: 2000, 2004, 2005, 2008, 2009) with 36% of all animals testing positive for brevetoxin (n = 118) and 53% positive for DA (n = 83) with several individuals (14%) testing positive for both neurotoxins in at least one tissue/fluid. To date there have been no previously published reports of DA in southwestern Florida marine mammals, however the May 2008 health assessment coincided with a Pseudo-nitzschia pseudodelicatissima bloom that was the likely source of DA observed in seawater and live dolphin samples. Concurrently, both DA and brevetoxin were observed in common prey fish. Although no Pseudo-nitzschia bloom was identified the following year, DA was identified in seawater, fish, sediment, snails, and dolphins. DA concentrations in feces were positively correlated with hematologic parameters including an increase in total white blood cell (p = 0.001) and eosinophil (p<0.001) counts. Our findings demonstrate that dolphins within Sarasota Bay are commonly exposed to two algal toxins, and provide the impetus to further explore the potential long-term impacts on bottlenose dolphin health.


Assuntos
Golfinho Nariz-de-Garrafa/metabolismo , Exposição Ambiental/análise , Monitoramento Ambiental , Ácido Caínico/análogos & derivados , Toxinas Marinhas/toxicidade , Oxocinas/toxicidade , Animais , Golfinho Nariz-de-Garrafa/sangue , Golfinho Nariz-de-Garrafa/urina , Contagem de Células , Dinoflagellida/citologia , Dinoflagellida/efeitos dos fármacos , Eosinófilos/citologia , Eosinófilos/efeitos dos fármacos , Fezes , Peixes/metabolismo , Florida , Geografia , Saúde , Ácido Caínico/toxicidade , Modelos Lineares , Oceanos e Mares , Caramujos/efeitos dos fármacos , Caramujos/metabolismo
18.
J Refract Surg ; 24(3): 274-9, 2008 03.
Artigo em Inglês | MEDLINE | ID: mdl-18416262

RESUMO

PURPOSE: To investigate the use of wavefront-guided LASIK after multifocal intraocular lens (IOL) implantation to correct residual ametropia and higher order aberrations. METHODS: In a prospective, nonrandomized case series, wavefront-guided LASIK was performed in 27 eyes (19 patients) after multifocal IOL implantation (Tecnis diffractive IOL, n = 20; ReSTOR diffractive IOL, n = 4; ReZoom refractive IOL, n = 3) using the VISX STAR S4 IR excimer laser. Visual acuity, manifest refraction, and wavefront error were examined pre- and 3 months postoperatively. RESULTS: In the Tecnis group, results before (after) LASIK were: sphere +1.06 +/- 0.77 diopters (D) (-0.03 +/- 0.28 D; P = .0001), cylinder -1.13 +/- 0.73 D (-0.14 +/- 0.25 D; P = .00004), distance uncorrected visual acuity (UCVA) 20/45 +/- 0.09 (20/29 +/- 0.16; P = .00004), near UCVA 20/30 +/- 0.24 (20/25 +/- 0.16; P = .001), and higher order aberrations (4-mm pupil) 0.14 +/- 0.05 microm (0.18 +/-0.03 microm; P = .02). Distance and near best spectacle-corrected visual acuity (BSCVA) did not change. In the ReSTOR group, results before (after) LASIK were: sphere +0.75 +/- 0.56 D (+0.13 +/- 0.22 D), cylinder -1.50 +/- 0.47 D (-0.13 +/- 0.22 D), distance UCVA 20/40 +/- 0.07 (20/26 +/- 0.07), near UCVA 20/44 +/- 0.05 (20/25 +/- 0.0), and higher order aberrations (4-mm pupil) 0.14 +/- 0.03 microm (0.20 +/- 0.02 microm). Distance and near BSCVA did not change. In the ReZoom group, results before (after) LASIK were: sphere +0.08 +/- 1.20 D (0.00 D), cylinder -0.83 +/- 0.120 D (0.00 D), distance UCVA 20/40 +/- 0 (20/25 +/- 0), near UCVA 20/60 +/- 0.09 (20/150 +/- 0.18), and higher order aberrations (4-mm pupil) 0.43 +/- 0.04 microm (0.39 +/- 0.03 microm). Patients lost one line of distance BSCVA and two lines of near BSCVA. CONCLUSIONS: Wavefront-guided LASIK is safe and effective in diffractive multifocal IOLs to correct residual refractive error, but higher order aberrations did not improve. It is not recommended in refractive multifocal IOLs, as these cannot be measured reliably with current wavefront sensors.


Assuntos
Substância Própria/cirurgia , Ceratomileuse Assistida por Excimer Laser In Situ/métodos , Lasers de Excimer , Implante de Lente Intraocular , Complicações Pós-Operatórias , Adulto , Idoso , Substância Própria/fisiopatologia , Topografia da Córnea , Feminino , Humanos , Lentes Intraoculares , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Desenho de Prótese , Pseudofacia/fisiopatologia , Refração Ocular/fisiologia , Erros de Refração/etiologia , Erros de Refração/fisiopatologia , Erros de Refração/terapia , Retalhos Cirúrgicos , Acuidade Visual/fisiologia
19.
Toxicon ; 50(4): 581-4, 2007 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-17588631

RESUMO

The toxin load of shellfish hepatopancreas harvested from the Caucasian Black Sea Coast of the Russian Federation was investigated. The majority of the toxin load was shown to be yessotoxin (YTX), 45-hydroxy-yessotoxin (45-OH-YTX), and homoyessotoxin (homoYTX). Concurrent with the mussel intoxication, the dinoflagellates Lingulodinium polyedrum and Gonyaulax spinifera were found in high concentrations.


Assuntos
Bivalves/patogenicidade , Éteres Cíclicos/isolamento & purificação , Oxocinas/isolamento & purificação , Animais , Cromatografia Líquida de Alta Pressão , Éteres Cíclicos/química , Éteres Cíclicos/toxicidade , Espectrometria de Massas , Venenos de Moluscos , Oxocinas/química , Oxocinas/toxicidade
20.
Aust Health Rev ; 26(3): 31-42, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-15368818

RESUMO

The need for an integrated and life course approach to the prevention and control of chronic diseases is increasingly being recognised. This paper describes the development of the Northern Territory Preventable Chronic Disease Strategy (PCDS), the strategic framework and evidence base, the design of implementation and monitoring phases, and early outcomes. The PCDS is premised on the belief that the major chronic diseases, and their common underlying risk factors, are potentially preventable. The structural challenges to larger jurisdictions taking such an integrated approach are undoubtedly larger, but the benefits are potentially great. Continuing with a series of vertical programs aimed at each single noncommunicable disease will not deliver the desired national health outcomes.


Assuntos
Doença Crônica , Prestação Integrada de Cuidados de Saúde/organização & administração , Promoção da Saúde/organização & administração , Atenção Primária à Saúde/organização & administração , Prevenção Primária/organização & administração , Doença Crônica/epidemiologia , Comportamento Cooperativo , Educação em Saúde , Política de Saúde , Acessibilidade aos Serviços de Saúde , Necessidades e Demandas de Serviços de Saúde , Humanos , Havaiano Nativo ou Outro Ilhéu do Pacífico , Northern Territory/epidemiologia , Desenvolvimento de Programas
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