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1.
Mol Biol Evol ; 2024 Sep 26.
Artigo em Inglês | MEDLINE | ID: mdl-39324637

RESUMO

Interspecific introgression is a potentially important source of novel variation of adaptive significance. Although multiple cases of adaptive introgression are well documented, broader generalizations about its targets and mechanisms are lacking. Multi-allelic balancing selection, particularly when acting through rare allele advantage, is an evolutionary mechanism expected to favor adaptive introgression. This is because introgressed alleles are likely to confer an immediate selective advantage, facilitating their establishment in the recipient species even in the face of strong genomic barriers to introgression. Vertebrate Major Histocompatibility Complex (MHC) genes are well-established targets of long-term multi-allelic balancing selection, so widespread adaptive MHC introgression is expected. Here we evaluate this hypothesis using data from 29 hybrid zones formed by fish, amphibians, squamates, turtles, birds and mammals at advanced stages of speciation. The key prediction of more extensive MHC introgression compared to genome-wide introgression was tested with three complementary statistical approaches. We found evidence for widespread adaptive introgression of MHC genes, providing a link between the process of adaptive introgression and an underlying mechanism. Our work identifies MHC introgression as a general mechanism by which species can acquire novel, and possibly regain previously lost, variation that may enhance defense against pathogens and increase adaptive potential.

2.
Acta Biomater ; 2024 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-39214161

RESUMO

Many medical devices implanted in patients to mitigate diseases and medical conditions have different types of topographic features. While appropriate textures can promote the integration of host cells and reduce scar tissue formation, some textured implants with inappropriate topographies have been associated with inflammation, bacterial colonization, or even malignant complications. To better understand how surface topography affects host immune response to colonizing bacteria, a protocol was developed to investigate phagocytosis of bacterial cells attached on polydimethylsiloxane (PDMS) surfaces with different square-shaped recessive patterns. The interaction between activated RAW 264.7 macrophages and Escherichia coli in recessive wells was visualized in 3D using multiple fluorescent markers. The results revealed that there is a threshold dimension of topography, below which phagocytosis of attached bacterial cells is significantly impeded. Specifically, under our experimental condition, up to 100-fold reduction in phagocytosis was observed in square-shaped patterns with 5 µm side length and 10 µm depth compared to the flat control and patterns with 10 µm or longer side length. The spacing between wells also showed significant effects; e.g., phagocytosis in the wells further decreased when spacing increased to 50 µm. These results are helpful for understanding how undesired topographies may contribute to bacterial colonization and thus infection and other associated complications. STATEMENT OF SIGNIFICANCE: Surface topography plays an important role in bacteria-material infections and thus the safety of implantable medical devices. Undesired topographic features can cause biofilm formation and related complications. However, how surface topography affects the capability of host immune cells to clear colonizing bacteria is not well understood. In this study, the interaction between macrophage RAW264.7 and colonizing E. coli cells on polydimethylsiloxane (PDMS) with recessive features is investigated. It was discovered that the size of recessive features and the spacing between these features have significant effects on phagocytosis of bacteria by macrophages. These new results are helpful for understanding the complex interaction among host cells, bacteria, and implanted biomaterials, which will help guide the rational design of safer medical devices.

3.
Rhinology ; 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38950374

RESUMO

BACKGROUND: The objective of this study was to identify how - and to what extent - overall symptom severity (OSS) score reflects individual chronic rhinosinusitis (CRS) symptoms and whether it can be measured using alternatives to the standard visual analog scale (VAS). METHODS: CRS patients from four sites across three continents rated their OSS scores, severities of nasal obstruction, nasal drainage, decreased sense of smell, facial pain/pressure and sleep disturbance using a standard VAS, VAS with labeled tick marks at every 1 centimeter, and by writing down their OSS on a scale of 0 - 100 (which was divided by 10), all of which lead to severity scores ranging from 0 - 10 in 0.1 intervals. Quality of life was measured using the SNOT-22 and EQ-5D VAS. RESULTS: In 311 CRS patients, OSS score was significantly correlated with SNOT-22 and EQ-5D VAS. OSS score was most greatly associated with the mean of all individual symptom severity scores. From individual CRS symptoms, OSS was most greatly associated with nasal obstruction followed by nasal drainage and facial pain/pressure severities. These results held true for participants with and without nasal polyps. Measurement of OSS and individual symptom severity scores using a standard VAS, tick-marked VAS, and write-in option had near-perfect consistency. CONCLUSIONS: We demonstrate for the first time that OSS largely reflects the mean of individual CRS symptom severities, although OSS is=== most weighted by nasal obstruction severity. OSS and individual symptom severity scores can be measured using a standard VAS, tick-marked VAS or write-in prompt with near-perfect consistency.

4.
Res Sq ; 2024 May 29.
Artigo em Inglês | MEDLINE | ID: mdl-38853848

RESUMO

Background: While cannabis use is prevalent among people with HIV (PWH), factors associated with higher-risk use require further study. We examined factors associated with indicators risk for cannabis use disorder (CUD) among PWH who used cannabis. Methods: Participants included adult (≥18 years old) PWH from 3 HIV primary care clinics in Kaiser Permanente Northern California who reported past three-month cannabis use through the computerized Tobacco, Alcohol, Prescription medication, and other Substance use (TAPS) screening. Primary outcome was TAPS cannabis score (range 1-3), categorized as any use (1) and higher risk for CUD (≥2). Measures included sociodemographics (age, sex, race, neighborhood deprivation index [NDI]), Charlson Comorbidity Index (CCI), HIV RNA, CD4 cell counts, higher risk tobacco use (TAPS tobacco score≥2), depression, and anxiety symptoms. Unadjusted and multivariable logistic regression examined factors associated with higher risk for CUD. Results: Of the complete sample (N=978; 94.1% Male; 58.3% White; Age Mode=51-60), 35.8% reported higher risk for CUD. Unadjusted models indicated younger age, Black race, higher CCI, depression, anxiety, and higher risk tobacco use were associated with higher risk, while only Black race (OR=1.84, 95% CI[1.29, 2.63]), anxiety (OR=1.91, 95% CI[1.22, 2.98]), and higher risk tobacco use (OR=2.27, 95% CI[1.47, 3.51]) remained significant in the multivariable model. Conclusions: Black race, anxiety and tobacco use, but not HIV clinical markers, were associated with higher risk for CUD among PWH. Clinical efforts to screen and provide interventions for preventing CUD alongside anxiety and tobacco use among PWH should be evaluated.

5.
Ann Oncol ; 35(9): 792-804, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38908482

RESUMO

BACKGROUND: Hormone receptor expression is a known positive prognostic and predictive factor in breast cancer; however, limited evidence exists on its prognostic impact on prognosis of young patients harboring a pathogenic variant (PV) in the BRCA1 and/or BRCA2 genes. PATIENTS AND METHODS: This international, multicenter, retrospective cohort study included young patients (aged ≤40 years) diagnosed with invasive breast cancer and harboring germline PVs in BRCA genes. We investigated the impact of hormone receptor status on clinical behavior and outcomes of breast cancer. Outcomes of interest [disease-free survival (DFS), breast cancer-specific survival (BCSS), and overall survival (OS)] were first investigated according to hormone receptor expression (positive versus negative), and then according to breast cancer subtype [luminal A-like versus luminal B-like versus triple-negative versus human epidermal growth factor receptor 2 (HER2)-positive breast cancer]. RESULTS: From 78 centers worldwide, 4709 BRCA carriers were included, of whom 2143 (45.5%) had hormone receptor-positive and 2566 (54.5%) hormone receptor-negative breast cancer. Median follow-up was 7.9 years. The rate of distant recurrences was higher in patients with hormone receptor-positive disease (13.1% versus 9.6%, P < 0.001), while the rate of second primary breast cancer was lower (9.1% versus 14.7%, P < 0.001) compared to patients with hormone receptor-negative disease. The 8-year DFS was 65.8% and 63.4% in patients with hormone receptor-positive and negative disease, respectively. The hazard ratio of hormone receptor-positive versus negative disease changed over time for DFS, BCSS, and OS (P < 0.05 for interaction of hormone receptor status and survival time). Patients with luminal A-like breast cancer had the worst long-term prognosis in terms of DFS compared to all the other subgroups (8-year DFS: 60.8% in luminal A-like versus 63.5% in triple-negative versus 65.5% in HER2-positive and 69.7% in luminal B-like subtype). CONCLUSIONS: In young BRCA carriers, differences in recurrence pattern and second primary breast cancer among hormone receptor-positive versus negative disease warrant consideration in counseling patients on treatment, follow-up, and risk-reducing surgery.


Assuntos
Proteína BRCA1 , Proteína BRCA2 , Neoplasias da Mama , Receptor ErbB-2 , Receptores de Estrogênio , Receptores de Progesterona , Humanos , Feminino , Adulto , Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Neoplasias da Mama/mortalidade , Neoplasias da Mama/metabolismo , Estudos Retrospectivos , Proteína BRCA1/genética , Proteína BRCA2/genética , Receptor ErbB-2/metabolismo , Receptor ErbB-2/genética , Receptores de Estrogênio/metabolismo , Receptores de Progesterona/metabolismo , Prognóstico , Intervalo Livre de Doença , Adulto Jovem , Mutação em Linhagem Germinativa , Heterozigoto , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo
6.
Midwifery ; 132: 103952, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38442530

RESUMO

AIM: This study aimed to explore student midwives' theoretical knowledge of intrapartum intermittent auscultation, their confidence in, and their experience of this mode of fetal monitoring. DESIGN AND SETTING: An online cross-section survey with closed and open questions. Descriptive statistics were used to analyse participants' intermittent auscultation knowledge, confidence, and experience. Reflexive thematic analysis was used to identify patterns within the free text about participants' experiences. PARTICIPANTS: Undergraduate midwifery students (n = 303) from Nursing and Midwifery Council-approved educational institutions within the United Kingdom. FINDINGS: Most participants demonstrated good theoretical knowledge. They had witnessed the technique being used in clinical practice, and when performed, the practice was reported to be in line with national guidance. In closed questions, participants reported feeling confident in their intermittent auscultation skills; however, these data contrasted with free-text responses. CONCLUSION: This cross-sectional survey found that student midwives possess adequate knowledge of intermittent auscultation. However, reflecting individual clinical experiences, their confidence in their ability to perform intermittent auscultation varied. A lack of opportunity to practice intermittent auscultation, organisational culture, and midwives' preferences have caused student midwives to question their capabilities with this essential clinical skill, leaving some with doubt about their competency close to registration.


Assuntos
Competência Clínica , Estudantes de Enfermagem , Humanos , Estudos Transversais , Feminino , Reino Unido , Estudantes de Enfermagem/estatística & dados numéricos , Estudantes de Enfermagem/psicologia , Inquéritos e Questionários , Adulto , Competência Clínica/normas , Competência Clínica/estatística & dados numéricos , Gravidez , Enfermeiros Obstétricos/estatística & dados numéricos , Enfermeiros Obstétricos/educação , Enfermeiros Obstétricos/psicologia , Frequência Cardíaca Fetal/fisiologia , Tocologia/educação , Tocologia/métodos , Tocologia/estatística & dados numéricos , Bacharelado em Enfermagem/métodos , Auscultação/métodos , Auscultação/estatística & dados numéricos , Auscultação/normas
7.
Rhinology ; 62(3): 330-341, 2024 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-38189480

RESUMO

BACKGROUND: In this study, we identified key discrete clinical and technical factors that may correlate with primary reconstructive success in endoscopic skull base surgery (ESBS). METHODS: ESBS cases with intraoperative cerebrospinal fluid (CSF) leaks at four tertiary academic rhinology programs were retrospectively reviewed. Logistic regression identified factors associated with surgical outcomes by defect subsite (anterior cranial fossa [ACF], suprasellar [SS], purely sellar, posterior cranial fossa [PCF]). RESULTS: Of 706 patients (50.4% female), 61.9% had pituitary adenomas, 73.4% had sellar or SS defects, and 20.5% had high-flow intraoperative CSF leaks. The postoperative CSF leak rate was 7.8%. Larger defect size predicted ACF postoperative leaks; use of rigid reconstruction and older age protected against sellar postoperative leaks; and use of dural sealants compared to fibrin glue protected against PCF postoperative leaks. SS postoperative leaks occurred less frequently with the use of dural onlay. Body-mass index, intraoperative CSF leak flow rate, and the use of lumbar drain were not significantly associated with postoperative CSF leak. Meningitis was associated with larger tumors in ACF defects, nondissolvable nasal packing in SS defects, and high-flow intraoperative leaks in PCF defects. Sinus infections were more common in sellar defects with synthetic grafts and nondissolvable nasal packing. CONCLUSIONS: Depending on defect subsite, reconstructive success following ESBS may be influenced by factors, such as age, defect size, and the use of rigid reconstruction, dural onlay, and tissue sealants.


Assuntos
Vazamento de Líquido Cefalorraquidiano , Endoscopia , Procedimentos de Cirurgia Plástica , Base do Crânio , Humanos , Feminino , Masculino , Base do Crânio/cirurgia , Vazamento de Líquido Cefalorraquidiano/etiologia , Vazamento de Líquido Cefalorraquidiano/prevenção & controle , Vazamento de Líquido Cefalorraquidiano/epidemiologia , Estudos Retrospectivos , Pessoa de Meia-Idade , Endoscopia/métodos , Procedimentos de Cirurgia Plástica/métodos , Adulto , Complicações Pós-Operatórias/prevenção & controle , Complicações Pós-Operatórias/epidemiologia , Idoso , Neoplasias Hipofisárias/cirurgia , Neoplasias da Base do Crânio/cirurgia , Rinorreia de Líquido Cefalorraquidiano/prevenção & controle , Rinorreia de Líquido Cefalorraquidiano/cirurgia , Rinorreia de Líquido Cefalorraquidiano/etiologia
8.
J Orthop Res ; 42(3): 512-517, 2024 03.
Artigo em Inglês | MEDLINE | ID: mdl-38146070

RESUMO

Antimicrobial strategies for musculoskeletal infections are typically first developed with in vitro models. The In Vitro Section of the 2023 Orthopedic Research Society Musculoskeletal Infection international consensus meeting (ICM) probed our state of knowledge of in vitro systems with respect to bacteria and biofilm phenotype, standards, in vitro activity, and the ability to predict in vivo efficacy. A subset of ICM delegates performed systematic reviews on 15 questions and made recommendations and assessment of the level of evidence that were then voted on by 72 ICM delegates. Here, we report recommendations and rationale from the reviews and the results of the internet vote. Only two questions received a ≥90% consensus vote, emphasizing the disparate approaches and lack of established consensus for in vitro modeling and interpretation of results. Comments on knowledge gaps and the need for further research on these critical MSKI questions are included.


Assuntos
Biofilmes , Consenso
10.
Aust Dent J ; 68(4): 247-254, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37665214

RESUMO

BACKGROUND: Oral health promotion initiatives must be evidence-based and consistent with broader health messaging. The Oral Health Messages for the Australian Public were first produced in 2009 and sought to enable a focused, and strategic approach to oral health promotion in Australia. As the evidence base and needs of the Australian population have since changed, this consensus statement was updated in 2022-2023. METHODS: The process of updating the messages consisted of 3 phases (preparatory phase, the Delphi technique, final revision phase). The preparatory phase included public and expert consultation, an umbrella review of published scientific literature and review of available recommendations, policies and guidelines. The Delphi technique used in this study was guided by Guidance on Conducting and REporting DElphi Studies (CREDES) and included 2 voting rounds. There were 70 experts in round 1 and 60 experts in round 2. Delphi participants comprised of experts from a variety of fields to ensure diversity and inclusion, balance expertise and maximize stakeholder representation. Consensus was defined as 75% agreement. RESULTS: A total of 11 messages were included in the 2022 update of Oral Health Messages for Australia. CONCLUSION: The updated oral health messages will support oral health promotion policy and activity at both individual and population level to improve the oral health of Australians.


Assuntos
Promoção da Saúde , Saúde Bucal , Humanos , Austrália , Promoção da Saúde/métodos , Consenso , Técnica Delphi
11.
Rhinology ; 61(5): 386-403, 2023 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-37453134

RESUMO

Despite widespread adoption and advances in endoscopic skull base surgery, with expanding indications and the ability to effectively treat larger and more complex pathologies, skull base reconstruction following tumor resection and prevention of cerebrospinal fluid leak remains a challenge for even the most seasoned of surgical teams. Mounting evidence in all areas have pushed our understanding of skull base reconstruction principles forward. In this narrative review, we summarize critical concepts and provide practical but comprehensive guiding principles on preoperative, intraoperative/technical, and postoperative management principles related to optimizing skull base reconstructive success. The goal is to provide an informative resource for skull base surgeons (both otolaryngologists and neurosurgeons) to reference regarding state-of-the-art evidence surrounding this ever-evolving topic.


Assuntos
Procedimentos de Cirurgia Plástica , Neoplasias da Base do Crânio , Humanos , Complicações Pós-Operatórias/prevenção & controle , Complicações Pós-Operatórias/cirurgia , Base do Crânio/cirurgia , Retalhos Cirúrgicos/cirurgia , Vazamento de Líquido Cefalorraquidiano/prevenção & controle , Vazamento de Líquido Cefalorraquidiano/cirurgia , Neoplasias da Base do Crânio/cirurgia , Endoscopia , Estudos Retrospectivos
14.
J Small Anim Pract ; 64(1): 12-20, 2023 01.
Artigo em Inglês | MEDLINE | ID: mdl-36089334

RESUMO

OBJECTIVES: This study aims to re-evaluate the low-dose dexamethasone suppression test 8-hour cortisol cut-point for the diagnosis of hypercortisolism in dogs using a solid-phase, competitive chemiluminescent enzyme immunoassay. MATERIALS AND METHODS: Twenty-seven client-owned dogs with naturally occurring hypercortisolism and 30 healthy control dogs were prospectively recruited. Performance of the low-dose dexamethasone suppression test was assessed using sensitivity, specificity and a receiver operating characteristic curve compared to a clinical diagnosis of hypercortisolism including response to treatment. RESULTS: Twenty-four dogs were diagnosed with pituitary-dependent hypercortisolism and three with adrenal-dependent hypercortisolism. In 30 healthy control dogs, 8-hour post-dexamethasone cortisol concentrations ranged from 5.5 to 39 nmol/L. A receiver operating characteristic curve curve constructed from the 8-hour post-dexamethasone cortisol concentrations of hypercortisolism and control dogs demonstrated that the most discriminatory cut-point was more than 39 nmol/L with sensitivity of 85.2% (95% confidence interval, 67.5% to 94.1%) and specificity of 100% (95% confidence interval, 88.7% to 100.0%) and an area under the curve of 0.963. CLINICAL SIGNIFICANCE: The optimal cut-point of more than 36 nmol/L proposed by this study is similar to the currently accepted 8-hour cortisol concentration cut-point for diagnosing hypercortisolism when using a solid-phase, competitive chemiluminescent enzyme immunoassay.


Assuntos
Síndrome de Cushing , Doenças do Cão , Cães , Animais , Hidrocortisona , Dexametasona , Sensibilidade e Especificidade , Síndrome de Cushing/veterinária , Curva ROC , Doenças do Cão/diagnóstico
15.
Ann Oncol ; 33(12): 1250-1268, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36228963

RESUMO

BACKGROUND: The randomized, double-blind OlympiA trial compared 1 year of the oral poly(adenosine diphosphate-ribose) polymerase inhibitor, olaparib, to matching placebo as adjuvant therapy for patients with pathogenic or likely pathogenic variants in germline BRCA1 or BRCA2 (gBRCA1/2pv) and high-risk, human epidermal growth factor receptor 2-negative, early breast cancer (EBC). The first pre-specified interim analysis (IA) previously demonstrated statistically significant improvement in invasive disease-free survival (IDFS) and distant disease-free survival (DDFS). The olaparib group had fewer deaths than the placebo group, but the difference did not reach statistical significance for overall survival (OS). We now report the pre-specified second IA of OS with updates of IDFS, DDFS, and safety. PATIENTS AND METHODS: One thousand eight hundred and thirty-six patients were randomly assigned to olaparib or placebo following (neo)adjuvant chemotherapy, surgery, and radiation therapy if indicated. Endocrine therapy was given concurrently with study medication for hormone receptor-positive cancers. Statistical significance for OS at this IA required P < 0.015. RESULTS: With a median follow-up of 3.5 years, the second IA of OS demonstrated significant improvement in the olaparib group relative to the placebo group [hazard ratio 0.68; 98.5% confidence interval (CI) 0.47-0.97; P = 0.009]. Four-year OS was 89.8% in the olaparib group and 86.4% in the placebo group (Δ 3.4%, 95% CI -0.1% to 6.8%). Four-year IDFS for the olaparib group versus placebo group was 82.7% versus 75.4% (Δ 7.3%, 95% CI 3.0% to 11.5%) and 4-year DDFS was 86.5% versus 79.1% (Δ 7.4%, 95% CI 3.6% to 11.3%), respectively. Subset analyses for OS, IDFS, and DDFS demonstrated benefit across major subgroups. No new safety signals were identified including no new cases of acute myeloid leukemia or myelodysplastic syndrome. CONCLUSION: With 3.5 years of median follow-up, OlympiA demonstrates statistically significant improvement in OS with adjuvant olaparib compared with placebo for gBRCA1/2pv-associated EBC and maintained improvements in the previously reported, statistically significant endpoints of IDFS and DDFS with no new safety signals.


Assuntos
Neoplasias da Mama , Humanos , Feminino , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/genética , Ftalazinas/efeitos adversos , Células Germinativas/patologia , Proteína BRCA1/genética
16.
Rhinology ; 60(6): 444-452, 2022 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-36150161

RESUMO

BACKGROUND: The objective of this study was to determine concordance of patient-reported chronic rhinosinusitis (CRS) disease control with CRS disease control assessed according to European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS) criteria. METHODS: In 421 participants, CRS disease control was determined using EPOS criteria which include the burden of 5 symptoms measured on a binary scale, use of rescue medications in the prior 6 months and presence of diseased mucosa on nasal endoscopy. Symptom severity was also assessed using a visual analogue scale (VAS). Participants rated their CRS disease control as "controlled","partly controlled" or "uncontrolled". RESULTS: Patient-reported and EPOS-based CRS disease control ratings agreed for 49.6% of participants. Amongst cases of disagreement, EPOS guidelines assessed worse CRS disease control relative to 92.9% of patients. Facial pain/pressure and impaired sense of smell distinctly associated with patient agreement with EPOS guidelines on having "uncontrolled" CRS. Higher VAS symptom scores were associated with worse patient-reported CRS disease control (i.e., agreeing with EPOS guidelines). Removal of the nasal endoscopy criterion improved agreement between patients' and EPOS control assessments, and replacement of this criterion with patient-reported control further aligned EPOS guidelines with patient perspectives. CONCLUSIONS: EPOS guidelines regularly assess worse CRS control than assessed by patients. The lack of more gradated symptom severity criteria and inclusion of nasal endoscopy may contribute to discordance of EPOS guidelines with patient-reported CRS control. Replacement of nasal endoscopy findings with a measure of patient-reported CRS disease control better aligns EPOS CRS disease control guidelines with patients' perspectives.


Assuntos
Pólipos Nasais , Rinite , Sinusite , Humanos , Rinite/complicações , Rinite/diagnóstico , Rinite/tratamento farmacológico , Sinusite/complicações , Sinusite/diagnóstico , Sinusite/tratamento farmacológico , Pólipos Nasais/complicações , Pólipos Nasais/diagnóstico , Doença Crônica , Endoscopia
17.
ACS Appl Bio Mater ; 5(8): 3816-3825, 2022 08 15.
Artigo em Inglês | MEDLINE | ID: mdl-35816421

RESUMO

The specific topography of biomaterials plays an important role in their biological interactions with cells and thus the safety of medical implants. Antifouling materials can be engineered with topographic features to repel microbes. Meanwhile, undesired topographies of implants can cause complications such as breast implant-associated anaplastic large cell lymphoma (BIA-ALCL). While the cause of BIA-ALCL is not well understood, it is speculated that textured surfaces are prone to bacterial biofilm formation as a contributing factor. To guide the design of safer biomaterials and implants, quantitative screening approaches are needed to assess bacterial adhesion to different topographic surface features. Here we report the development of a high-throughput microplate biofilm assay for such screening. The assay was used to test a library of polydimethylsiloxane (PDMS) textures composed of varying sizes of recessive features and distances between features including those in the range of breast implant textures. Outliers of patterns prone to bacterial adhesion were further studied using real-time confocal fluorescence microscopy. The results from these analyses revealed that surface area itself is a poor predictor for adhesion, while the size and spacing of topographic features play an important role. This high-throughput biofilm assay can be applied to studying bacteria-material interactions and rational development of materials that inhibit bacterial colonization.


Assuntos
Implantes de Mama , Linfoma Anaplásico de Células Grandes , Bactérias , Materiais Biocompatíveis , Biofilmes , Implantes de Mama/efeitos adversos , Humanos , Linfoma Anaplásico de Células Grandes/etiologia
18.
Rhinology ; 60(4): 282-292, 2022 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-35608041

RESUMO

BACKGROUND: The definition of disease control in chronic rhinosinusitis (CRS) is an active area of study. However, investigations have not engaged CRS patients in how they think about disease control. This study seeks to understand the patient perspective on CRS disease control. METHODS: Qualitative phenomenological study using constant comparative methodology was applied. The research team conducted 10, one-on-one interviews with CRS patients ranging from 22 to 55 minutes in length. The content of the interview protocol was determined through iterative discussion amongst all authors. Two authors served as coders to identify recurrent themes. Themes were analyzed for meaning and conclusions were summarized. RESULTS: Three recurring themes determined from patients were that (1) use of the terminology control adequately represents this phenomenon, (2) components of control could be classified into four main themes relating to CRS symptomatology, exacerbation of comorbid disease, quality of life and acute exacerbations of CRS, and (3) when patients deem their CRS is uncontrolled they are more willing to escalate their treatment to include escalating their daily maintenance regimen, seeking otolaryngology referral, taking rescue medication or undergoing endoscopic sinus surgery. CONCLUSIONS: CRS patients consider their daily symptoms, the severity and frequency of CRS exacerbations, impact on quality of life as well as exacerbation of comorbid disease when thinking about their disease control. Disease control is a goal of treatment for patients and uncontrolled disease motivates patients to seek further treatment. Physicians should explore all components of CRS control when considering disease status and need for further treatment.


Assuntos
Rinite , Sinusite , Doença Crônica , Endoscopia/métodos , Humanos , Qualidade de Vida , Rinite/diagnóstico , Rinite/cirurgia , Sinusite/tratamento farmacológico
19.
Biomech Model Mechanobiol ; 21(4): 1117-1131, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35534762

RESUMO

Recent reports of adverse health effects (e.g., capsular contracture, lymphoma) linked to the absence or presence of texture on soft-tissue implants (e.g., breast implants) suggest surface topography may have pathological impact(s). We propose that surface texture influences the transfer of displacements, experienced by an implant undergoing micromotion, to surrounding interfacial extracellular matrix, which in turn impacts the activity of the resident cells and is based on degree of tissue integration. We hypothesize that transfer of displacements due to micromotion promotes interstitial fluid movement that imposes hydrodynamic stresses (pressures, shear stresses) on cells residing in the interfacial tissues and impacts their activity. To address this, we developed a computer simulation to approximate hydrodynamic stresses in the interstitial environment of saturated poroelastic tissues (model soft-tissue implantation sites) generated from oscillatory implant micromotion as a function of the magnitude of translational displacement, direction of motion, degree of tissue integration, and surface roughness of the implant. Highly integrated implants were predicted to generate the highest fluid shear stresses within model tissues, with oscillatory fluid shear stresses up to 80 dyn/cm2 for a 20-µm displacement. Notably, application of oscillatory 80 dyn/cm2 shear stress to cultured human fibroblasts elicited cell death after 20 h compared to cells maintained under static conditions or exposed to 80 dyn/cm2 steady, unidirectional shear. These results indicate that oscillatory interstitial fluid stresses generated by micromotion of an integrated implant may influence the activity of the surrounding cells and play a role in the body's fibrotic response to textured soft-tissue implants.


Assuntos
Hidrodinâmica , Próteses e Implantes , Simulação por Computador , Humanos , Movimento (Física) , Estresse Mecânico
20.
Rhinology ; 60(3): 229-235, 2022 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-35229832

RESUMO

BACKGROUND: The goal of this study was to determine how to translate visual analogue scale (VAS) symptom scores to the binary, descriptive symptom scales used in the European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS) criteria for chronic rhinosinusitis (CRS) disease control. METHODS: 309 CRS patients were recruited. All patients rated their burden of 5 symptoms (nasal blockage, rhinorrhea/postnasal drip, facial pain/pressure, smell loss, sleep disturbance or fatigue) using the binary EPOS descriptive symptom scales and a VAS (on a scale of 0 to 10). In addition, participants completed a 22-item Sinonasal Outcome Test (SNOT-22) and rated their overall CRS disease control as "controlled", "partly controlled" or "uncontrolled" Results: Symptom burdens measured by VAS, binary descriptive EPOS scale and SNOT-22 were associated with worsening CRS disease control reported by participants. Each symptom had a distinct VAS score cut-off that strongly predicted the uncontrolled option on the corresponding binary descriptive EPOS symptom scale. However, the predictive ability of VAS for rhinorrhea/ postnasal drip was disparately worse than the other 4 symptoms. When considering all symptom data simultaneously, a VAS score higher than 3.5 strongly predicted the uncontrolled option on the corresponding binary descriptive EPOS symptom scale for all 5 symptoms. CONCLUSIONS: A VAS symptom score of higher than 3.5 translates to the uncontrolled option in the binary, descriptive symptom scale of the EPOS control criteria. The rhinorrhea/postnasal drip descriptive symptom scale translates disparately worse to VAS scores and may be considered for revision in future criteria.


Assuntos
Pólipos Nasais , Rinite , Sinusite , Humanos , Escala Visual Analógica , Rinite/complicações , Rinite/diagnóstico , Sinusite/complicações , Sinusite/diagnóstico , Pólipos Nasais/complicações , Pólipos Nasais/diagnóstico , Rinorreia , Doença Crônica
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