Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 35
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Am J Otolaryngol ; 43(2): 103388, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35144105

RESUMO

INTRODUCTION: Social media platforms are constantly evolving and expanding to new populations, exposing their users to various topics and serving as an informal educational resource. Medical ideas and topics are freely discussed online, making understanding of what is present on these platforms of particular importance to the practicing medical professional. In the field of otolaryngology, the public social media portrayal of sinus surgery has not been previously reported. METHODS: Social media posts using keywords related to sinus surgery on Facebook, Instagram, and TikTok were qualitatively analyzed and categorized based on media type, author, subject, timing, depiction, and popularity. RESULTS: The total number of posts included in final analysis was 1798, with a majority stemming from Instagram (68.5%), then Facebook (20.2%) and finally TikTok (11.3%). The most common type of media analyzed was images (69.0%) and patients were more often authors of posts (45.1%) as compared to physicians (34.8%). The subjects of the posts were nearly equally reassurance regarding surgery (41.3%) and educational or informational posts (38.8%) and were most commonly timed in the postoperative period (41.3%). Sinus surgery was depicted in a positive fashion most frequently (56.6%), notably compared against the negative portrayal at 3.2%. Negative posts most commonly cited postoperative pain or bleeding. CONCLUSIONS: Most social media posts analyzed in this multi-platform study depicted sinus surgery in a positive fashion. Patients tended to post in the postoperative or perioperative period, whereas physicians tender to post intraoperative educational posts. Negative posts were most commonly centered around postoperative pain. Cautious interpretation of these results could be used for improving patient care and outreach in the digital age.


Assuntos
Mídias Sociais , Humanos
2.
PLoS Comput Biol ; 14(12): e1006634, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30589845

RESUMO

Several key transcription factors have unusually short half-lives compared to other cellular proteins. Here, we explore the utility of active degradation in shaping how the multiple antibiotic resistance activator MarA coordinates its downstream targets. MarA controls a variety of stress response genes in Escherichia coli. We modify its half-life either by knocking down the protease that targets it via CRISPRi or by engineering MarA to protect it from degradation. Our experimental and analytical results indicate that active degradation can impact both the rate of coordination and the maximum coordination that downstream genes can achieve. In the context of multi-gene regulation, trade-offs between these properties show that perfect information fidelity and instantaneous coordination cannot coexist.


Assuntos
Proteínas de Ligação a DNA/metabolismo , Proteínas de Escherichia coli/metabolismo , Biologia Computacional , Proteínas de Ligação a DNA/genética , Escherichia coli/genética , Escherichia coli/metabolismo , Proteínas de Escherichia coli/antagonistas & inibidores , Proteínas de Escherichia coli/genética , Regulação Bacteriana da Expressão Gênica , Técnicas de Silenciamento de Genes , Genes Bacterianos , Meia-Vida , Modelos Biológicos , Protease La/antagonistas & inibidores , Protease La/genética , Protease La/metabolismo , Proteólise , Processos Estocásticos
3.
PLoS Comput Biol ; 13(1): e1005310, 2017 01.
Artigo em Inglês | MEDLINE | ID: mdl-28060821

RESUMO

Stress response networks frequently have a single upstream regulator that controls many downstream genes. However, the downstream targets are often diverse, therefore it remains unclear how their expression is specialized when under the command of a common regulator. To address this, we focused on a stress response network where the multiple antibiotic resistance activator MarA from Escherichia coli regulates diverse targets ranging from small RNAs to efflux pumps. Using single-cell experiments and computational modeling, we showed that each downstream gene studied has distinct activation, noise, and information transmission properties. Critically, our results demonstrate that understanding biological context is essential; we found examples where strong activation only occurs outside physiologically relevant ranges of MarA and others where noise is high at wild type MarA levels and decreases as MarA reaches its physiological limit. These results demonstrate how a single regulatory protein can maintain specificity while orchestrating the response of many downstream genes.


Assuntos
Proteínas de Ligação a DNA/genética , Farmacorresistência Bacteriana/genética , Proteínas de Escherichia coli/genética , Regulação Bacteriana da Expressão Gênica/genética , Estresse Fisiológico/genética , Biologia Computacional , Proteínas de Ligação a DNA/metabolismo , Escherichia coli/genética , Proteínas de Escherichia coli/metabolismo , Regiões Promotoras Genéticas/genética , Análise de Célula Única
4.
Otolaryngol Head Neck Surg ; 170(1): 305-308, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37449434

RESUMO

Dr Byron J. Bailey, a preeminent figure in the field of Otolaryngology, exemplified an unwavering commitment to patient care, resident education, research excellence, and humanitarian endeavors throughout his illustrious career. Born in 1934, Dr Bailey played a pivotal role in the growth and success of the Department of Otolaryngology at the University of Texas Medical Branch. A dedicated educator and researcher, he authored groundbreaking research and the seminal textbook, Bailey's Head and Neck Surgery-Otolaryngology. His leadership in major organizations and commitment to research integrity and quality are hallmarks of his career. Dr Bailey's philanthropic pursuits include improving Otolaryngology care and access in Vietnam and Cuba, and local community efforts in Galveston, Texas. His enduring legacy continues to inspire future generations of Otolaryngologists, serving as a testament to the power of perseverance and dedication to excellence in the pursuit of medical education.


Assuntos
Otolaringologia , Humanos , Texas , Liderança
5.
Int J Pediatr Otorhinolaryngol ; 176: 111816, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38104524

RESUMO

OBJECTIVES: To assess the influence of social media platforms, including TikTok, Instagram, and Facebook, in shaping public perceptions about tonsillectomies and to identify the nature of the content disseminated on these platforms. METHODS: A comprehensive analysis of 1482 relevant social media posts related to tonsillectomies was conducted across major platforms, including TikTok, Instagram, and Facebook. Content was categorized based on author, topic of the post, timeframe, and overall tone. The study also compared engagement metrics across platforms. RESULTS: TikTok emerged as the most engaging platform with a mean of 3272.8 likes per post. Patients drove 61.6 % of the discourse, with 63.9 % of discussions being lifestyle oriented. Educational content constituted 12.5 % of the overall discourse. Sentiments towards the procedure were almost evenly split, with 29.4 % positive and 28.5 % negative; 92 % of the negative posts were authored by patients. CONCLUSIONS: Patients were the most common social media authors, driving the conversation and a significant portion expressing negative views. Physicians, conversely, showed a low level of social media engagement. By understanding and addressing online narratives, clinicians can offer more informed patient support, debunk myths, and provide empathetic insights, ensuring positive patient experiences in the era of digital health communication.


Assuntos
Mídias Sociais , Tonsilectomia , Voz , Humanos , Comunicação , Saúde Digital
6.
Ear Nose Throat J ; : 1455613241263181, 2024 Jun 16.
Artigo em Inglês | MEDLINE | ID: mdl-38880987

RESUMO

Background: Targeted therapies like denosumab have revolutionized multiple myeloma (MM) treatment, improved patient outcomes while introducing long-term complications. This study explores a rare instance of delayed maxillary osteonecrosis post-denosumab therapy, delving into its pathophysiology and management. Methods: A 40-year-old male MM patient who developed a painful palatal lesion post denosumab treatment and diagnosed of maxillary osteonecrosis by computed tomography scan and surgical biopsy is presented. Treatment history, symptom progression, and response to the PENTOCLO protocol were analyzed. Results: Post-denosumab discontinuation osteonecrosis highlights its prolonged impact on bone metabolism. PENTOCLO treatment protocol led to significant improvement. Genetic factors influencing osteonecrosis susceptibility have been discussed and considered. Conclusions: This case underscores the need for vigilance regarding long-term complications in MM survivors, preventive strategies, including regular dental evaluations and reducing invasive dental procedures, are crucial. We advocate for an interdisciplinary approach and further research into tailored prevention and management of osteonecrosis in cancer survivors.

7.
Head Neck ; 45(2): 464-472, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36515649

RESUMO

BACKGROUND: Social media continues to grow as a relevant information source for the lay public and medical professionals. METHODS: A search of posts on Facebook and Instagram was conducted using the hashtag #laryngectomy. Posts were categorized based upon perspective, media type, timeframe, topic, tone, and popularity. RESULTS: Final analysis included 929 Instagram posts and 355 Facebook posts. Most Facebook posts were made by companies (38%) and physicians (17%) with information (30%) and advertisements (22%) being common topics. Patients (40%) were the largest group of Instagram authors with lifestyle (39%) being the most common topic. Greater than 90% of posts were either neutral or positive in tone across both platforms. CONCLUSIONS: Patient perspective was most commonly represented on Instagram, whereas Facebook more commonly included posts by physicians and companies. The majority of posts carried a neutral or positive tone, which is consistent with positive quality of life patients have shown postoperatively.


Assuntos
Médicos , Mídias Sociais , Humanos , Qualidade de Vida , Laringectomia , Percepção
8.
Int Forum Allergy Rhinol ; 13(11): 2092-2095, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37178369

RESUMO

KEY POINTS: We analyzed social media posts on Facebook and Instagram discussing new rhinologic devices. Patient posts are a valuable source of patient perspective regarding rhinologic procedures. The majority of posts are by physicians giving information and advertising these new procedures.

9.
Otol Neurotol ; 44(1): e13-e21, 2023 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-36509437

RESUMO

OBJECTIVE: To identify populations of authors who post about cochlear implants (CIs) on Instagram and TikTok, to illustrate the content of these posts, and to elucidate factors that might help surgeons better educate CI patients. STUDY DESIGN: Qualitative study. SETTING: Instagram and TikTok social media platforms. PATIENTS: All public social media posts identified with the search terms below. Posts were excluded if unrelated to CIs or if written in a non-English language. INTERVENTION: Instagram and TikTok were searched for posts from March 2021 through September 2021 with the search terms #cochlearimplant, #cochlearimplants, #cochlearimplantkids, #cochlearkids, and #cochlearfamily. MAIN OUTCOME MEASURES: Posts were subclassified and analyzed for content including topics of posts, authorship, timeframe of posts, depiction of CIs, and popularity. RESULTS: Of 1,942 posts included in the final analysis, 1,400 were found on Instagram and 542 on TikTok. Authors were mostly patients (n = 771, 39.7%), companies (n = 568, 29.2%), and patients' family members (n = 482, 24.8%). Only 21 posts were made by physicians (1.1%). Out of 379 total educational posts examined, patients themselves were the most common authors (n = 219, 57.8%) followed by patients' family members (n = 139, 36.7%). Physicians authored only a small fraction of all educational posts (n = 19, 5.0%). CONCLUSIONS: This study showed minimal physician involvement in the CI social media spheres of Instagram and TikTok. In addition, there were few educational posts on either platform, revealing ample opportunity for physicians to become more involved with CI social media.


Assuntos
Mídias Sociais , Cirurgiões , Humanos
10.
Healthcare (Basel) ; 11(23)2023 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-38063650

RESUMO

In the landscape of sleep surgery, the Inspire® Upper Airway Stimulation (UAS) device has gained prominence as an increasingly popular treatment option for obstructive sleep apnea, prompting significant discourse across social media platforms. This study explores the social media narrative of the UAS device, particularly the nature of multimedia content, author demographics, and audience engagement on Instagram, Facebook, and TikTok. Our analysis encompassed 423 public posts, revealing images (67.4%) and videos (28.1%) as the dominant content types, with over a third of posts authored by physicians. A notable 40% of posts were advertisements, whereas patient experiences comprised 34.5%. TikTok, although presenting a smaller sample size, showed a substantially higher engagement rate, with posts averaging 152.9 likes, compared with Instagram and Facebook at 32.7 and 41.2 likes, respectively. The findings underscore the need for otolaryngologists and healthcare professionals to provide clear, evidence-based information on digital platforms. Given social media's expanding role in healthcare, medical professionals must foster digital literacy and safeguard the accuracy of health information online. In this study, we concluded that maintaining an evidence-based, transparent digital dialogue for medical innovations such as the UAS device necessitates collaborative efforts among physicians, health institutions, and technology companies.

11.
Cureus ; 14(4): e24259, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35607544

RESUMO

Choanal atresia is a rare congenital airway malformation that presents a unique surgical challenge for pediatric otolaryngologists. Here we report two classic cases of choanal atresia and examine the surgical approaches to this entity. The first case was a four-day-old female with a history of CHARGE syndrome and bilateral mixed membranous and bony choanal atresia confirmed by a CT scan. After undergoing transnasal endoscopic repair, choanal stents were placed for four weeks, and the patient was seen three months postoperatively and found to be doing well with no respiratory concerns. The second case involved a healthy three-year-old female presenting with unilateral combined membranous and bony atresia. Following successful endoscopic repair, she was seen at a three-month follow-up with no signs of restenosis. Additionally, a literature review was performed to evaluate updates since the 2012 Cochrane Review on surgical treatment of congenital choanal atresia.

12.
Ear Nose Throat J ; : 1455613221095606, 2022 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-35414290

RESUMO

Misophonia is a chronic condition in which patients experience a strong negative, emotional, or psychologic reaction to specific sounds. These sounds cause the individual to have a sudden, uncontrolled, and disproportionate negative reaction affecting their daily activities. The literature describes several cases of misophonia in the adult population; however, only 2 pediatric case studies are reported. Herein, we present 2 additional cases. An exaggerated response to an auditory stimulus is observed in other disorders such as tinnitus, hyperacusis, migraines, and many psychiatric disorders. Sound aversion has a broad differential diagnosis and may require visits to numerous specialists, placing strain on the patient and the healthcare system. Furthermore, misophonia is underdiagnosed in the pediatric population as it requires self-reporting of symptoms. The pathophysiology, prevalence, and treatment of misophonia continue to be relatively unknown. We attempt to highlight this rarely reported pediatric diagnosis and elaborate on its clinical presentation to increase awareness among otolaryngologists.

13.
Interv Neuroradiol ; : 15910199221142645, 2022 Nov 29.
Artigo em Inglês | MEDLINE | ID: mdl-36445070

RESUMO

Embolization of oral hemorrhages due to tooth extraction, although rare, has been previously described.1-4 In this video we present a unique case in which a life-threatening tooth extraction hemorrhage was incontrollable with local compression or surgical cauterization. The patient underwent emergent transradial coil embolization5 of the posterior lateral nasal branches of the sphenopalatine artery. However, the patient returned 11 days later with a lower volume bleed at the original site. Computed tomography angiography showed a pseudoaneurysm at the orthognathic surgery crater retrogradely recanalized through the greater palatine arcade. Surgical options were deemed too invasive, and the decision was made to attempt percutaneous direct puncture embolization. This was unsuccessful and repeat embolization with Onyx was performed through the contralateral greater palatine artery. The patient had complete resolution of symptoms.

14.
Ear Nose Throat J ; 101(6): 368-371, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32986491

RESUMO

Pilomatricomas are benign skin tumors often encountered by otolaryngologists but frequently misdiagnosed. Although they can occur at any age, they commonly present in children as a discolored superficial lesion adhered to the overlying skin. Accurate preoperative diagnosis is crucial for appropriate management, which is surgical in most cases. Here, we present bilateral pilomatricomas mimicking features of several other diagnoses in a pediatric patient. The patient was successfully treated with surgical excision. This case presented a unique diagnostic challenge, as the lesions exhibited features of several common diagnoses. In general, surgical management of pilomatricoma is curative, and recurrence is rare.


Assuntos
Doenças do Cabelo , Pilomatrixoma , Neoplasias Cutâneas , Criança , Doenças do Cabelo/diagnóstico , Doenças do Cabelo/patologia , Doenças do Cabelo/cirurgia , Humanos , Otorrinolaringologistas , Pilomatrixoma/diagnóstico , Pilomatrixoma/patologia , Pilomatrixoma/cirurgia , Pele/patologia , Neoplasias Cutâneas/diagnóstico , Neoplasias Cutâneas/patologia , Neoplasias Cutâneas/cirurgia
15.
Ear Nose Throat J ; : 1455613221112761, 2022 Aug 08.
Artigo em Inglês | MEDLINE | ID: mdl-35939505

RESUMO

INTRODUCTION: Despite the presence of a growing body of literature suggesting cost-ineffectiveness of routine pathologic analysis of tonsillectomy specimens, little is known about common institutional policies and practice patterns of pediatric otolaryngologists. The objectives of this study were to determine the prevalence of routine pathological evaluation of tonsillectomy specimens for uncomplicated pediatric adenotonsillectomy procedures and to evaluate opinions regarding this controversy among board-certified pediatric otolaryngologists. METHODS: This was a cross-sectional survey study sent to board-certified pediatric otolaryngologists currently practicing and registered with the American Society of Pediatric Otolaryngology (ASPO) assessing their institutions' or practices' current policies on sending routine tonsillectomy specimens for pathology, their experience with this practice, and their opinions on whether routine pathologic analysis should be employed. Basic statistical analysis was then conducted. RESULTS: Respondents mostly practiced in an academic setting (68.4%), with the next most common being academically affiliated private practice (21.8%), and private practice was the least common (9.8%). Most respondents (85.1%) did not agree with routine pathologic analysis of otherwise uncomplicated pediatric tonsillectomy specimens. CONCLUSION: Most pediatric otolaryngologists who responded to this survey do not support routine pathological analysis of otherwise uncomplicated pediatric tonsillectomy specimens. However, the results are likely biased and should be interpreted carefully, since only a small percentage of pediatric otolaryngologists responded to the survey. Potential cost savings could be seen by patients, payers, and hospital systems with judicious use of surgical pathology, specifically in cases with concurrent signs or symptoms suspicious for malignancy.

16.
Cureus ; 14(12): e32755, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36686132

RESUMO

BACKGROUND: The benefits and challenges of successful breastfeeding for both mother and child have been well-established in the literature. While ankyloglossia, or tongue tie, alone or in combination with upper lip tie has been the focus of several previous studies, very few have directly addressed isolated symptomatic upper lip tie and the role of surgical correction for breastfeeding difficulties. MATERIALS AND METHODS: Seven infants with isolated upper lip tie and breastfeeding difficulty were taken to the operating room for labial frenotomy. These infants were assessed at their follow-up visits for their degree of weight gain since their procedure. Their mothers were surveyed regarding their experiences with breastfeeding since the frenotomy was performed. RESULTS: In this article, we present seven infants with isolated upper lip tie and breastfeeding difficulty who were treated with labial frenotomy. Subsequently, these infants demonstrated improved weight gain, and all mothers reported increased ease of breastfeeding. CONCLUSION: These findings implicate lip tie as an underrecognized cause of breastfeeding difficulty and suggest that labial frenotomy is an effective treatment in these patients. Larger-scale randomized controlled studies are necessary to further evaluate this topic.

17.
Clin Case Rep ; 10(1): e05319, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35127091

RESUMO

Combined large cell neuroendocrine carcinoma (LCNEC) and squamous cell carcinoma (SCC) of the H&N are exceptionally rare. We present the case of combined p16 negative SCC and LCNEC of the oropharynx treated with combination chemotherapy. This is the third reported case of combined neuroendocrine carcinoma and SCC of the oropharynx.

18.
Cancer Rep (Hoboken) ; 5(9): e1615, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35285584

RESUMO

BACKGROUND: Tonsillar squamous cell carcinoma (TSCC) due to human papillomavirus (HPV) infection has seen a dramatic increase in recent years. Bilateral tonsillar squamous cell carcinoma (biTSCC) has a much lower incidence than unilateral TSCC and three main hypotheses of biTSCC pathogenesis prevail: field carcinogenesis, single-clone, and multiple HPV infections. CASE: A 49-year-old Male with a remote history of chewing tobacco presented with symptoms of spitting up tissue and occasional hemoptysis. Physical exam showed a sole left tonsillar mass which was confirmed to be TSCC on biopsy. The patient's computed tomographic (CT) scan was consistent with this finding; however, positron emission tomography (PET) scan indicated a second tumor in the contralateral right tonsil. Surgical resection of both masses and selective neck dissection was performed, and the specimens were sent for further pathological analysis. No complications of surgery were noted and the final diagnosis of synchronous biTSCC was made. The tumors were a T2N0M0 left poorly differentiated TSCC (p16+, EGFR+, bcl2+) with basaloid features, and a T1N0M0 right well to moderately differentiated TSCC (p16+, EGFR+, bcl2-). CONCLUSION: Our present case was notable for differing tumor pathology and karyotype analysis between the right and left masses, directly supporting the multiple HPV infections hypothesis of biTSCC pathogenesis. Further genetic characterization of tonsillar tumors is needed to better characterize TSCC and best guide medical/surgical therapy.


Assuntos
Carcinoma de Células Escamosas , Neoplasias Primárias Múltiplas , Infecções por Papillomavirus , Neoplasias Tonsilares , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/cirurgia , Receptores ErbB , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Primárias Múltiplas/diagnóstico , Neoplasias Primárias Múltiplas/patologia , Tonsila Palatina/patologia , Tonsila Palatina/cirurgia , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/diagnóstico , Proteínas Proto-Oncogênicas c-bcl-2 , Neoplasias Tonsilares/diagnóstico , Neoplasias Tonsilares/patologia , Neoplasias Tonsilares/cirurgia
19.
OTO Open ; 6(1): 2473974X221086964, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35387357

RESUMO

Objective: To investigate the popular social media platforms Instagram and Facebook for public posts related to tympanostomy tubes in children, to discern attitudes and perceptions surrounding tympanostomy tubes, and to evaluate the content of social media posts related to tympanostomy tubes. Study Design: Qualitative study. Setting: Instagram and Facebook social media platforms. Methods: Instagram and Facebook were searched for public posts from 2018 and 2019 including the search terms "ear tubes,""ear tube surgery,""tympanostomy," and "myringotomy." Posts were excluded if they were unrelated to pediatric tympanostomy tubes or written in a non-English language. Relevant posts underwent subgroup analysis based on 6 domains: media type, perspective, topic, timeframe, popularity, and overall tone. Results: Of 1862 public social media posts, the majority (78.2%) were made by the patient's parents/caregivers and the rest by physicians (6.0%), hospitals (8.2%), and chiropractors (6.1%), with a few posts by the patients themselves (0.4%). The majority (79.3%) of posts portrayed tympanostomy tubes positively. Most negative posts were made by chiropractors (50.8%) and the patient's parents/caregivers (42.9%). The most common themes of posts were reassurance regarding surgery (74.9%), advertisements (12.5%), apprehension (12.4%), and education (10.3%). Conclusion: Most social media posts were made by parents/caregivers in the perioperative period, and there was a low percentage of educational posts. This information could be used by otolaryngologists to optimize their interactions with patients and parents and to potentially increase physician involvement and educational material related to tympanostomy tubes on social media.

20.
Anal Chem ; 83(17): 6500-10, 2011 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-21774540

RESUMO

High molecular weight hyperbranched polyglycerol (HPG) was selected for development as a soluble polymer support for the targeted selection and release of primary-amine containing peptides from a complex mixture. HPG has been functionalized with ester-linked aldehyde groups that can bind primary-amine containing peptides via a reductive alkylation reaction. Once bound, the high molecular weight of the polymer facilitates separation from a complex peptide mixture by employing either a 30 kDa molecular weight cutoff membrane or precipitation in acetonitrile. Following the removal of unbound peptides and reagents, subsequent hydrolysis of the ester linker releases the bound peptide into solution for analysis by mass spectrometry. Released peptides retain the linker moiety and are therefore characteristically mass-shifted. Four water-soluble cleavable aldehyde polymers (CAP1, CAP2, CAP3, and CAP4) ranging in types of linker groups, length of the linker groups, have been prepared and characterized, each demonstrating the ability to selectively enrich and sequence primary-amine peptides from a complex human proteome containing blocked (dimethylated amine) and unblocked (primary amine) peptides. The polymers have very low nonspecific peptide-binding properties while possessing significantly more reactive groups per milligram of the support than commercially available resins. The polymers exhibit a range of reactivities and binding capacities that depend on the type of linker group between the aldehyde group and the polymer. Using various linker structures, we also probed the mechanism of the observed dehydration of hydrolyzed peptides during matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis.


Assuntos
Aldeídos/química , Glicerol/química , Polímeros/química , Proteômica/métodos , Ésteres , Glicerol/síntese química , Peptídeos/química , Polímeros/síntese química , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA