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1.
Telemed Rep ; 4(1): 156-165, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37771697

RESUMO

Background: Studies suggest that preoperative evaluation can be effectively conducted through telehealth. As the COVID-19 pandemic has accelerated digital transformation, we hypothesize that a new telehealth model of care may be feasibly implemented for preoperative evaluation at our institution. This qualitative study seeks to evaluate the attitudes and perception of elective surgery patients and health care providers toward telehealth conducted for preanesthesia evaluation. Methods: At a tertiary women's hospital in Asia, health care providers and elective surgery patients were recruited by convenience and snowball sampling to undergo one-on-one semistructured interviews regarding a new telehealth model of care for preanesthesia evaluation, under-pinned by the Normalization Process Theory. Data were analyzed, coded, and consolidated into themes using the framework analysis method by a team of four researchers from diverse backgrounds. Results: Twenty-five interviews were conducted among 10 patients and 15 health care participants. Ninety-five codes were identified, consolidated into four themes that connect to guide the implementation of a new telehealth pathway for preoperative care, mapped to the Normalization Process Theory. The themes pertain to advantages of telehealth workflow (coherence), requisites for new telehealth workflow (coherence, collective action), barriers to implementation (cognitive participation, collective action), and enablers of implementation (cognitive participation, collective action). All participants were receptive to telehealth, but health care participants expressed concern about the impact of additional tasks on current clinical workload. Training in videoconferencing was deemed essential by both patients and health care providers. Conclusions: The study has provided insights into levels of coherence and cognitive participation among patients and health care providers. The telehealth workflow should be redesigned, considering systems' constraints and stakeholders' needs. Greater buy-in is needed to gain health care providers' commitment for collective action. Clinicaltrials.gov identifier: NCT05781789.

2.
Zhonghua Yi Xue Za Zhi ; 103(33): 2614-2618, 2023 Sep 05.
Artigo em Chinês | MEDLINE | ID: mdl-37650208

RESUMO

Objective: To explore the effect of strengthening individualized nutrition education in the second trimester based on first trimester on blood glucose. Methods: A retrospective study was conducted on 398 pregnant women aged (31.79±3.48) (23-41) years old who underwent an oral glucose tolerance test (OGTT) from October 2021 to December 2022 at Beijing Tsinghua Changgung Hospital. They were divided into two groups according to whether the women were re-visited in second trimester or not. The routine group consisted of 205 pregnant women aged between 24 and 41 (31.49±3.36) years old who only received the first trimester nutrition education and the strengthening group consisted of 193 pregnant women aged (31.92±3.97) (23-41) years old who received both the first and second trimester nutrition education. Then according to pre pregnancy body mass index (BMI), they were divided into normal (18.5 kg/m2≤BMI<24 kg/m2) and overweight (24 kg/m2≤BMI<28 kg/m2). The OGTT blood glucose level, the positive rate of gestational diabetes (GDM) and the weight gain during pregnancy were compared between the two groups with different BMI, in order to analyze the effect of strengthening nutrition education in the second trimester of pregnancy on blood glucose. Results: The differences between the two groups were not statistically significant in terms of the pregnant women's age, proportion of pregnant women aged≥35, proportion of pre-pregnancy BMI and overweight, parity and early pregnancy blood glucose (all P>0.05). The blood glucose levels of OGTT at 0, 1, and 2 hour were (4.57±0.37), (8.41±1.70), and (7.28±1.51) mmol/L, respectively, lower than those in the routine group [(4.74±0.48), (9.44±1.55), and (8.27±1.58) mmol/L, respectively, all P<0.001]. The positive rate of GDM in the strengthening group was 35.23% (68/193), which was lower than that in the routine group (91.71%, 188/205) (P<0.001). After the BMI stratification, the OGTT blood glucose levels and the positive rate of GDM in the strengthening group were still lower than those in the routine group (all P<0.05). The weight gain with normal BMI in the early pregnancy in routine group was higher than that in the strengthening group (P=0.003), but there was no significant statistical difference in weight gain of overweight pregnant women at different gestational weeks (all P>0.05). Conclusion: Strengthening a nutrition education about second trimester for pregnant women in the early stages of pregnancy can effectively improve blood glucose levels and reduce the positive rate of GDM.


Assuntos
Glicemia , Diabetes Gestacional , Gravidez , Feminino , Humanos , Adulto Jovem , Adulto , Sobrepeso , Primeiro Trimestre da Gravidez , Segundo Trimestre da Gravidez , Estudos Retrospectivos , Aumento de Peso
4.
Korean J Anesthesiol ; 75(2): 168-177, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-34911175

RESUMO

BACKGROUND: The American Society of Anesthesiologists (ASA) score is generated based on patients' clinical status. Accurate ASA classification is essential for the communication of perioperative risks and resource planning. Literature suggests that ASA classification can be automated for consistency and time-efficiency. To develop a rule-based algorithm for automated ASA classification, this study seeks to establish consensus in ASA classification for clinical conditions encountered at a tertiary women's hospital. METHODS: Thirty-seven anesthesia providers rated their agreement on a 4-point Likert scale to ASA scores assigned to items via the Delphi technique. After Round 1, the group's collective responses and individual item scores were shared with participants to improve their responses for Round 2. For each item, the percentage agreement ('agree' and 'strongly agree' responses combined), median (interquartile range/IQR), and SD were calculated. Consensus for each item was defined as a percentage agreement ≥ 70%, IQR  1.0, and SD < 1.0. RESULTS: All participants completed the study and none had missing data. The number of items that reached consensus increased from 25 (51.0%) to 37 (75.5%) in the second Delphi round, particularly for items assigned ASA scores of III and IV. Nine items, which pertained to alcohol intake, asthma, thyroid disease, limited exercise tolerance, and stable angina, did not reach consensus even after two Delphi rounds. CONCLUSIONS: Delphi consensus was attained for 37 of the 49 study items (75.5%), facilitating their incorporation into a rule-based clinical support system designed to automate the prediction of ASA classification.


Assuntos
Anestesiologistas , Anestesiologia , Consenso , Técnica Delphi , Feminino , Hospitais , Humanos , Estados Unidos
5.
Artigo em Inglês | WPRIM (Pacífico Ocidental) | ID: wpr-926546

RESUMO

Background@#The American Society of Anesthesiologists (ASA) score is generated based on patients’ clinical status. Accurate ASA classification is essential for the communication of perioperative risks and resource planning. Literature suggests that ASA classification can be automated for consistency and time-efficiency. To develop a rule-based algorithm for automated ASA classification, this study seeks to establish consensus in ASA classification for clinical conditions encountered at a tertiary women’s hospital. @*Methods@#Thirty-seven anesthesia providers rated their agreement on a 4-point Likert scale to ASA scores assigned to items via the Delphi technique. After Round 1, the group’s collective responses and individual item scores were shared with participants to improve their responses for Round 2. For each item, the percentage agreement (‘agree’ and ‘strongly agree’ responses combined), median (interquartile range/IQR), and SD were calculated. Consensus for each item was defined as a percentage agreement ≥ 70%, IQR  1.0, and SD < 1.0. @*Results@#All participants completed the study and none had missing data. The number of items that reached consensus increased from 25 (51.0%) to 37 (75.5%) in the second Delphi round, particularly for items assigned ASA scores of III and IV. Nine items, which pertained to alcohol intake, asthma, thyroid disease, limited exercise tolerance, and stable angina, did not reach consensus even after two Delphi rounds. @*Conclusions@#Delphi consensus was attained for 37 of the 49 study items (75.5%), facilitating their incorporation into a rule-based clinical support system designed to automate the prediction of ASA classification.

6.
BJS Open ; 5(2)2021 03 05.
Artigo em Inglês | MEDLINE | ID: mdl-33889950

RESUMO

BACKGROUND: The management of perforated diverticular disease has changed in the past 10 years with a move towards less surgical intervention. This population-based cohort study aimed to define the risk of death and readmission following non-operative management of perforated diverticular disease. METHODS: Patients diagnosed with perforated diverticular disease and managed without surgery were identified from the linked Clinical Practice Research Datalink and Hospital Episode Statistics data from 2000 to 2013. The outcomes were 1-year case fatality, readmissions, and surgery at readmission. RESULTS: In total, 880 patients with perforated diverticular disease were managed without surgery, comprising 523 women (59.4 per cent). The 1-year case fatality rate was 33.2 per cent (293 of 880). The majority of deaths occurred in the first 90 days after the index admission, with a 90-day case fatality rate of 28.8 per cent. The 90-day survival rate varied by age, and was 97.2 per cent among those aged less than 65 years, compared with 85.0 per cent for those aged between 65 and 74 years, and 47.7 per cent in those at least 75 years old. Of 767 patients discharged from hospital, 250 (32.6 per cent) were readmitted (47 elective, 6.1 per cent; 203 emergency, 26.5 per cent) during a median of 1.6 (i.q.r. 0.1-3.9) years of follow-up, with similar proportions in each age category. In the first year of follow-up, only 5.1 per cent of patients required surgery, of whom 16 of 767 (2.1 per cent) required elective and 23 (3.0 per cent) emergency operation. CONCLUSION: Non-operative management of perforated diverticulitis in those aged less than 65 years is feasible and safe. Reintervention rates following conservative management were low across all age categories.


Assuntos
Doenças Diverticulares/mortalidade , Doenças Diverticulares/terapia , Readmissão do Paciente/estatística & dados numéricos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Tratamento Conservador , Bases de Dados Factuais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Fatores de Risco , Perfuração Espontânea , Análise de Sobrevida , Resultado do Tratamento , Reino Unido/epidemiologia , Adulto Jovem
8.
J Mol Evol ; 86(6): 340-352, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29926120

RESUMO

Gene duplication creates a second copy of a gene either in tandem to the ancestral locus or dispersed to another chromosomal location. When the ancestral copy of a dispersed duplicate is lost from the genome, it creates the appearance that the gene was "relocated" from the ancestral locus to the derived location. Gene relocations may be as common as canonical dispersed duplications in which both the ancestral and derived copies are retained. Relocated genes appear to be under more selective constraints than the derived copies of canonical duplications, and they are possibly as conserved as single-copy non-relocated genes. To test this hypothesis, we combined comparative genomics, population genetics, gene expression, and functional analyses to assess the selection pressures acting on relocated, duplicated, and non-relocated single-copy genes in Drosophila genomes. We find that relocated genes evolve faster than single-copy non-relocated genes, and there is no evidence that this faster evolution is driven by positive selection. In addition, relocated genes are less essential for viability and male fertility than single-copy non-relocated genes, suggesting that relocated genes evolve fast because of relaxed selective constraints. However, relocated genes evolve slower than the derived copies of canonical dispersed duplicated genes. We therefore conclude that relocated genes are under more selective constraints than canonical duplicates, but are not as conserved as single-copy non-relocated genes.


Assuntos
Cromossomos/genética , Drosophila/genética , Genes de Insetos , Animais , Fertilidade/genética , Dosagem de Genes , Duplicação Gênica , Regulação da Expressão Gênica , Masculino , Polimorfismo Genético , Interferência de RNA , Testículo/metabolismo
10.
Opt Express ; 25(13): 14192-14203, 2017 Jun 26.
Artigo em Inglês | MEDLINE | ID: mdl-28789005

RESUMO

Directional breaking of the C-H/C-D molecular bond is manipulated in acetylene (C2H2) and deuterated acetylene (C2D2) by waveform controlled few-cycle mid-infrared laser pulses with a central wavelength around 1.6 µm at an intensity of about 8 × 1013 W/cm2. The directionality of the deprotonation of acetylene is controlled by changing the carrier-envelope phase (CEP). The CEP-control can be attributed to the laser-induced superposition of vibrational modes, which is sensitive to the sub-cycle evolution of the laser waveform. Our experiments and simulations indicate that near-resonant, intense mid-infrared pulses permit a higher degree of control of the directionality of the reaction compared to those obtained in near-infrared fields, in particular for the deuterated species.

11.
Aliment Pharmacol Ther ; 42(7): 855-66, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26250873

RESUMO

BACKGROUND: Clinical studies have reported reduced fertility in women with inflammatory bowel disease (IBD). AIM: To compare fertility rates in women with IBD to those in women without IBD and assess whether the relative fertility differed following IBD diagnosis, flares and surgery. METHODS: Women aged 15-44 years in 1990-2010 were identified from a UK primary care database. We estimated overall and age-specific fertility rates by 5-year age bands for women with and without IBD. We used Poisson regression to calculate adjusted fertility rate ratios (AFRR), adjusted for age, smoking and socioeconomic deprivation. RESULTS: There were 46.2 live births per 1000 person-years [95% confidence interval (95% CI); 44.6-47.9] in 9639 women with IBD and 49.3 (95% CI 49.2-49.5) in 2 131 864 without (AFRR: 0.93; 95% CI: 0.89-0.96). Excluding periods of contraception use, the AFRR was 0.99 (95% CI: 0.95-1.03). Before diagnosis, the AFRR for women with ulcerative colitis (UC) was 1.07 (95% CI: 0.99-1.16) and was 0.88 (95% CI: 0.81-0.97) for women with CD. After diagnosis, AFRRs were 0.87 (95% CI: 0.82-0.94) for CD and 0.92 (95% CI: 0.86-1.00) for UC. The fertility rate was lower following flares (AFRR: 0.70; 95% CI: 0.59-0.82) or surgery (AFRR: 0.84; 95% CI: 0.77-0.92). Women with pouch and non-pouch surgery had similar overall fertility though the reduction after surgery was greater for pouches (AFRR: 0.48; 95% CI: 0.23-0.99). CONCLUSIONS: Women with Crohn's disease have marginally lower fertility rates. These rates decreased following flares and surgical interventions. Fertility rates returned almost to normal when women were not prescribed contraception but the reduction following surgical intervention remained. As the lifetime effect of pouch vs. nonpouch surgery on fertility is small, the reduction post-pouch surgery should be interpreted with caution.


Assuntos
Coeficiente de Natalidade/tendências , Fertilidade/fisiologia , Infertilidade Feminina/epidemiologia , Doenças Inflamatórias Intestinais/epidemiologia , Adolescente , Adulto , Estudos de Coortes , Colite Ulcerativa/complicações , Colite Ulcerativa/epidemiologia , Doença de Crohn/complicações , Doença de Crohn/epidemiologia , Bases de Dados Factuais , Feminino , Humanos , Infertilidade Feminina/complicações , Doenças Inflamatórias Intestinais/complicações , Reino Unido/epidemiologia , Adulto Jovem
12.
Curr Opin Anaesthesiol ; 28(3): 285-9, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25827278

RESUMO

PURPOSE OF REVIEW: Neuraxial analgesia is considered the gold standard of labour analgesia as it provides the most effective method of pain relief during childbirth. In this article, we explore the recent advances in the initiation and maintenance of epidural analgesia. RECENT FINDINGS: Patient-controlled epidural analgesia, computer-integrated patient-controlled epidural analgesia, intermittent epidural bolus (programmed intermittent bolus, automated mandatory bolus) and variable frequency automated mandatory bolus administration are techniques that allow the individualized titration and optimization of labour analgesia. The debate has moved on to finding the optimal settings for epidural bolus dosing, time intervals and frequency for epidural analgesia with the hope of improving safety and efficacy as well as patient satisfaction. SUMMARY: We examine these recent developments in pump technology and epidural delivery systems and evaluate how these have enhanced the mothers' birthing experiences.


Assuntos
Analgesia Epidural/métodos , Analgesia Obstétrica/métodos , Trabalho de Parto , Adulto , Analgesia Controlada pelo Paciente , Feminino , Humanos , Gravidez
13.
BJOG ; 122(13): 1833-41, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25288361

RESUMO

OBJECTIVE: To examine major congenital anomaly (CA) risks in children of mothers with coeliac disease (CD) compared with mothers without CD. DESIGN: Population-based cohort study. SETTING: Linked maternal-child medical records from a large primary care database from the UK. POPULATION: A total of 562,332 live singletons of mothers with and without CD in 1990-2013. METHODS: We calculated the absolute major CA risks in children whose mothers had CD, and whether this was diagnosed or undiagnosed before childbirth. Logistic regression with a generalised estimating equation was used to estimate adjusted odds ratios (aORs) with 95% confidence intervals (95% CIs) for CAs associated with CD. MAIN OUTCOME MEASURES: Fourteen system-specific major CA groups classified according to the European Surveillance of Congenital Anomalies and neural tube defects (NTDs). RESULTS: Major CA risk in 1880 children of mothers with CD was 293 per 10,000 liveborn singletons, similar to the risk in those without CD (282; aOR 0.98, 95% CI 0.74-1.30). The risk was slightly higher in 971 children, whose mothers were undiagnosed (350; aOR 1.14, 95% CI 0.79-1.64), than in 909 children whose mothers were diagnosed (231; aOR 0.80, 95% CI 0.52-1.24). There was a three-fold increase in nervous system anomalies in the children of mothers with undiagnosed CD (aOR 2.98, 95% CI 1.06-8.33, based on five exposed cases and one had an NTD), and these women were all diagnosed with CD at least 4 years after their children were born. CONCLUSIONS: There was no statistically significant increase in risk of major CAs in children of mothers with coeliac disease overall, compared with the general population.


Assuntos
Doença Celíaca/epidemiologia , Anormalidades Congênitas/epidemiologia , Complicações na Gravidez/epidemiologia , Adolescente , Adulto , Feminino , Humanos , Modelos Logísticos , Pessoa de Meia-Idade , Malformações do Sistema Nervoso/epidemiologia , Defeitos do Tubo Neural/epidemiologia , Gravidez , Medição de Risco , Fatores de Risco , Reino Unido , Adulto Jovem
14.
BJOG ; 121(12): 1471-81, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24612301

RESUMO

OBJECTIVE: To estimate risks of major congenital anomaly (MCA) among children of mothers prescribed antidepressants during early pregnancy or diagnosed with depression but without antidepressant prescriptions. DESIGN: Population-based cohort study. SETTING: Linked UK maternal-child primary care records. POPULATION: A total of 349,127 singletons liveborn between 1990 and 2009. METHODS: Odds ratios adjusted for maternal sociodemographics and comorbidities (aORs) were calculated for MCAs, comparing women with first-trimester selective serotonin reuptake inhibitors (SSRIs) or tricyclic antidepressants (TCAs) and women with diagnosed but unmedicated depression, or women without diagnosed depression. MAIN OUTCOME MEASURES: Fourteen system-specific MCA groups classified according to the European Surveillance of Congenital Anomalies and five specific heart anomaly groups. RESULTS: Absolute risks of MCA were 2.7% (95% confidence interval, 95% CI, 2.6-2.8%) in children of mothers without diagnosed depression, 2.8% (95% CI 2.5-3.2%) in children of mothers with unmedicated depression, and 2.7% (95% CI 2.2-3.2%) and 3.1% (95% CI 2.2-4.1%) in children of mothers with SSRIs or TCAs, respectively. Compared with women without depression, MCA overall was not associated with unmedicated depression (aOR 1.07, 95% CI 0.96-1.18), SSRIs (aOR 1.01, 95% CI 0.88-1.17), or TCAs (aOR 1.09, 95% CI 0.87-1.38). Paroxetine was associated with increased heart anomalies (absolute risk 1.4% in the exposed group compared with 0.8% in women without depression; aOR 1.78, 95% CI 1.09-2.88), which decreased marginally when compared with women with diagnosed but unmedicated depression (aOR 1.67, 95% CI 1.00-2.80). CONCLUSIONS: Overall MCA risk did not increase with maternal depression or with antidepressant prescriptions. Paroxetine was associated with increases of heart anomalies, although this could represent a chance finding from a large number of comparisons undertaken.


Assuntos
Anormalidades Induzidas por Medicamentos/etiologia , Antidepressivos/efeitos adversos , Depressão/tratamento farmacológico , Complicações na Gravidez/tratamento farmacológico , Adulto , Antidepressivos/uso terapêutico , Antidepressivos Tricíclicos/efeitos adversos , Antidepressivos Tricíclicos/uso terapêutico , Estudos de Coortes , Feminino , Humanos , Modelos Logísticos , Razão de Chances , Gravidez , Estudos Prospectivos , Fatores de Risco , Inibidores Seletivos de Recaptação de Serotonina/efeitos adversos , Inibidores Seletivos de Recaptação de Serotonina/uso terapêutico
15.
Hernia ; 15(5): 517-20, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21626011

RESUMO

PURPOSE: The aim of the present randomized clinical study was to assess the efficacy of simplex lidocaine in local anesthesia for inguinal hernia mesh-repairs, compare analgesia of three different concentrations of lidocaine, and explore use of lower concentrations of lidocaine in local anesthesia for inguinal hernia mesh-repairs. METHODS: A total of 102 consecutive patients undergoing inguinal hernia repairs were randomized to three groups: group A (n = 34) received solution with a lidocaine concentration of 8 mg/mL, group B (n = 34) received a lidocaine concentration of 5 mg/mL, and in group C (n = 34) the lidocaine level was reduced to 3.3 mg/mL. Intraoperative pain and pain at 24 h and 48 h postoperatively were assessed by means of a visual analogue scale. Volume and doses of lidocaine used in local anesthesia were strictly recorded. RESULTS: The efficacy of simplex lidocaine in local anesthesia for inguinal hernia mesh-repairs was excellent, no patient required conversion to general anesthesia. The mean pain scores were not significantly different among the three groups. CONCLUSIONS: The local anesthesia technique was good with lidocaine alone in local anesthesia for inguinal hernia mesh-repairs. A concentration of 3.3 mg/mL lidocaine provided similar analgesia as 5 or 8 mg/mL lidocaine.


Assuntos
Anestésicos Locais/administração & dosagem , Hérnia Inguinal/cirurgia , Herniorrafia/efeitos adversos , Lidocaína/administração & dosagem , Dor/etiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Anestesia Local , Feminino , Herniorrafia/métodos , Humanos , Complicações Intraoperatórias , Masculino , Pessoa de Meia-Idade , Medição da Dor , Dor Pós-Operatória/etiologia , Telas Cirúrgicas
18.
J Virol Methods ; 142(1-2): 136-42, 2007 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-17328968

RESUMO

Rhopalosiphum padi virus (RhPV) is an insect RNA virus that infects aphids, reducing their lifespan and fecundity. It can be transmitted vertically between aphids and horizontally via the plant. An improved detection method for the virus in aphids and plants using RT-PCR was developed; this allowed individual aphids to be tested for RhPV. Testing of R. padi aphids collected from different sites in Sweden revealed the presence of RhPV in wild aphid populations for the first time in Europe. Virus could be detected in several life stages of R. padi, including sexual individuals and eggs, establishing an over-wintering route for the virus. Using RT-PCR, systemic transport of the virus in plants was tracked. Virus spread from the aphid feeding site to all parts of the plant, including roots, within 7 days, and could be acquired by virus-free aphids feeding on the same plant.


Assuntos
Afídeos/virologia , Hordeum/virologia , Vírus de Insetos/isolamento & purificação , Vírus de RNA/isolamento & purificação , Reação em Cadeia da Polimerase Via Transcriptase Reversa/métodos , Animais , Afídeos/crescimento & desenvolvimento , Hordeum/parasitologia , Vírus de Insetos/genética , Vírus de Insetos/fisiologia , Vírus de RNA/genética , Vírus de RNA/fisiologia , RNA Viral/análise , RNA Viral/isolamento & purificação , Suécia
19.
Cell Mol Life Sci ; 63(14): 1658-76, 2006 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-16786224

RESUMO

Our understanding of the biochemical mechanisms that mediate chemoreception in insects has been greatly improved after the discovery of olfactory and taste receptor proteins. However, the presence of soluble polypeptides in high concentration around the dendrites of sensory neurons still poses unanswered questions. More than 2 decades after their discovery and despite the wealth of structural information available, the physiological function of odorant-binding proteins is not well understood. More recently, members of a second family of soluble polypeptides, the chemosensory proteins, were also discovered in the lymph of chemosensilla. Here we review the structural properties of both classes of soluble proteins, their affinity to small ligands, and their expression in the different parts of the insect body and subcellular localisation. Finally, we discuss current ideas and models of the role of such proteins in insect chemoreception.


Assuntos
Células Quimiorreceptoras/fisiologia , Proteínas de Insetos/fisiologia , Insetos/fisiologia , Receptores Odorantes/fisiologia , Sequência de Aminoácidos , Animais , Comportamento Animal , Células Quimiorreceptoras/química , Sequência Consenso , Dendritos/fisiologia , Feminino , Regulação da Expressão Gênica , Proteínas de Insetos/química , Proteínas de Insetos/genética , Ligantes , Masculino , Modelos Moleculares , Dados de Sequência Molecular , Estrutura Molecular , Família Multigênica , Neurônios Aferentes/fisiologia , Odorantes , Especificidade de Órgãos , Feromônios/fisiologia , Filogenia , Ligação Proteica , Conformação Proteica , Receptores Odorantes/química , Receptores Odorantes/genética , Receptores de Feromônios/química , Receptores de Feromônios/genética , Receptores de Feromônios/fisiologia , Órgãos dos Sentidos/fisiologia , Alinhamento de Sequência , Homologia de Sequência de Aminoácidos , Olfato/fisiologia , Solubilidade , Especificidade da Espécie , Relação Estrutura-Atividade
20.
Cell Mol Life Sci ; 62(10): 1156-66, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15928808

RESUMO

We have identified, cloned and expressed a new chemosensory protein (CSP) in the desert locust Schistocerca gregaria belonging to a third sub-class of these polypeptides. Polyclonal antibodies stained a band of 14 kDa, as expected, in the extracts of antennae and palps of the adults, but not in the 4th and 5th instars. In the related species Locusta migratoria, instead, the same antibodies cross-reacted only with a band of apparent molecular mass of 35 kDa in the extract of 1st-5th instars, but not in the adults. The recombinant protein binds the fluorescent probe N-phenyl-1-naphthylamine, but none of the compounds so far reported as pheromones for S. gregaria. The expression of the odorant-binding protein (OBP) and of CSPs of sub-classes I and II was also monitored in antennae, tarsi, palpi, wings and other organs of solitary and gregarious locusts in their nymphal and adult stages. OBP was found to be antenna specific, where it is expressed at least from the 3rd instar in both solitary and gregarious locusts. CSPs, instead, appear to be more ubiquitous, with different expression patterns, according to the sub-class. Immunocytochemistry experiments revealed that OBP is present in the sensillum lymph of sensilla trichodea and basiconica, while CSP-I and CSP-III were found in the outer sensillum lymph of sensilla chaetica and in the sub-cuticular space between epidermis and cuticle of the antenna. Sensilla chaetica on other parts of the body showed the same expression of CSP-I as those on the antenna.


Assuntos
Gafanhotos/genética , Proteínas de Insetos/metabolismo , Receptores Odorantes/genética , 1-Naftilamina/análogos & derivados , 1-Naftilamina/metabolismo , Sequência de Aminoácidos , Animais , Western Blotting , Clonagem Molecular , Corantes Fluorescentes/metabolismo , Expressão Gênica , Gafanhotos/crescimento & desenvolvimento , Gafanhotos/ultraestrutura , Imuno-Histoquímica , Proteínas de Insetos/análise , Proteínas de Insetos/genética , Ligantes , Locusta migratoria/crescimento & desenvolvimento , Locusta migratoria/metabolismo , Locusta migratoria/ultraestrutura , Microscopia Eletrônica de Varredura , Microscopia Imunoeletrônica , Dados de Sequência Molecular , Ninfa/química , Ninfa/metabolismo , Receptores Odorantes/análise , Receptores Odorantes/metabolismo , Homologia de Sequência de Aminoácidos
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