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1.
Food Chem ; 462: 140971, 2025 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-39208734

RESUMEN

This study presents the contents of α-methylenecyclopropylglycine, a potentially toxic amino acid, in the peel, pulp and seed fractions of two well-known litchi varieties, namely Shahi and China, over a span of three harvest-seasons. For analysing α-methylenecyclopropylglycine, an LC-MS/MS-based method was validated. The method-accuracies fell within 75-110 % (RSD, <15 %) at 0.1 mg/kg (LOQ) and higher levels. A comparative evaluation of the results in peel, pulp and seed at 30 days before harvest (DBH), 15-DBH, and edible-ripe stage revealed that α-methylenecyclopropylglycine content increased as the litchi seeds grew towards maturity, regardless of the cultivar. In arils, at maturity, the concentration of α-methylenecyclopropylglycine ranged from not-detected to 11.7 µg/g dry weight. The Shahi cultivar showed slightly higher α-methylenecyclopropylglycine content in comparison to China litchi. This paper presents the first known analysis of combined seasonal data on different fruit components at various growth stages for the two chosen litchi cultivars grown in India.


Asunto(s)
Frutas , Litchi , Semillas , Espectrometría de Masas en Tándem , Litchi/química , Litchi/crecimiento & desarrollo , Litchi/metabolismo , Frutas/química , Frutas/crecimiento & desarrollo , China , Semillas/química , Semillas/crecimiento & desarrollo , Glicina/análogos & derivados , Glicina/análisis , Cromatografía Líquida de Alta Presión , Ciclopropanos/análisis
2.
Asian J Psychiatr ; 101: 104221, 2024 Sep 02.
Artículo en Inglés | MEDLINE | ID: mdl-39243660
3.
Cureus ; 16(8): e66072, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39224729

RESUMEN

Introduction Tobacco addiction is widely recognized as the most significant menace to both systemic and oral diseases, resulting in around eight million fatalities worldwide annually. The current investigation was conducted to assess the influence of tobacco cessation counseling on the quality of life linked to oral health and to identify obstacles to quitting among those who use tobacco. Methods This observational, follow-up study was carried out among patients referred to the tobacco cessation unit for the cessation of their smoking tobacco habit. Data on the participants was collected in two phases. Oral health-related quality of life (OHRQoL) was assessed at baseline and again three months after quitting smoking habits in the second phase. The assessment of barriers to quitting was done by asking a few questions of all participants. A student t-test and a chi-square test were applied with a p-value <0.05 considering significance. Results The study comprised a total of 322 patients, ranging in age from 18 to 62, with a mean age of 32.58 ± 12.901 years. After three months of quitting tobacco, a comparison of the mean scores of the Oral Health Impact Profile (OHIP) domains revealed a significant reduction in the mean score across all domains. The reduction was statistically significant, with a p-value of 0.001. Upon investigating the association between obstacles to quitting tobacco and socioeconomic position, it was discovered that the expense of quitting aids or tobacco programs, as well as the likelihood of weight gain, were strongly linked to the socioeconomic status of the individuals involved in the study. Conclusion Based on the results, the present study concluded that oral health-related quality of life significantly improved after quitting.

4.
Indian J Tuberc ; 71(4): 471-475, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39278682

RESUMEN

Silico-Tuberculosis (silico-TB) is a severe combination of tuberculosis and silicosis, caused by occupational exposure to fine crystalline silica dust, which has become a global health concern. This comprehensive review compiles the updated knowledge regarding pathophysiology, clinical manifestations, important diagnostic techniques, treatment aspects, and challenges in understanding silico-TB. The review compiles the disease's history and epidemiology, highlighting a lack of data owing to poor monitoring and healthcare particularly in low- and middle-income countries like India. Further weak safety regulations, lack of preventative measures, and inadequate education increase the rates of silico-TB. The pathophysiology shows how silica particles impair the immune system and stimulate Th2 cells and M2 macrophages, which exacerbate TB, while inhibiting Th1 cells and M1 macrophages, which fight against the disease. Subsequently, it can be difficult to distinguish current TB from pre-existing silicosis. In cases where sputum and X-ray results are negative, chest CT scans may be helpful since radiographic screening identifies TB earlier than sputum assessment. Isoniazid, rifampicin, or both minimize the risk of active tuberculosis in people with silicosis. Consistent anti-tuberculosis drug therapy is recommended for 8-9 months to stop recurrence. The assessment recommends integrating silicosis and TB control initiatives to fight this combined health issue.


Asunto(s)
Silicosis , Humanos , Silicosis/diagnóstico , Antituberculosos/uso terapéutico , Antituberculosos/efectos adversos , Exposición Profesional/efectos adversos , India/epidemiología , Silicotuberculosis/diagnóstico
5.
Cureus ; 16(7): e65331, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39184597

RESUMEN

BACKGROUND: Dental plaque may be attributed as a precursor to various oral health problems like dental caries, periodontal disease, halitosis, etc. With an ever-increasing awareness about the adverse effects of chemical formulations, emphasis is now being laid on the usage of herbal ingredients, as they are safer for long-term use in addition to their medicinal benefits. AIM: The present study aims to assess the anti-plaque and anti-inflammatory efficacy of herbal toothpaste compared to synthetic toothpaste among 20-40-year-old patients in Bareilly, Uttar Pradesh. METHODOLOGY: In this study, 130 subjects aged between 20 and 40 years with poor oral hygiene status and signs of gingival inflammation corresponding with chronic marginal gingivitis were selected. Subjects in Group 1 were prescribed herbal toothpaste (KUDOS Ayurveda), whereas patients in Group 2 were administered non-herbal toothpaste. Clinical parameters of gingival health specifically gingival index (GI), patient hygiene performance (PHP), and approximate plaque index (API) were recorded at baseline, 14 days, 28 days, and 42 days. Chi-square test, student-independent t-test, and paired t-test were performed to find significant differences in various variables between the two groups at different follow-up visits. RESULTS: At the end of the study, a significant reduction in GI and API scores was obtained, along with increased PHP scores. The p-value was set at 0.05, and the power of the study was set at 0.95. There was a statistically significant reduction (p < 0.05) in GI and API and an improvement in PHP scores at various time intervals in Group 1 as compared to Group 2.  Conclusion: Regular application of herbal extract dentifrices for 42 days provided a significant reduction of dental plaque and improvement in overall gingival health without any adverse effects. This instilled motivation in the patients to uphold proper oral hygiene. Hence, herbal dentifrices could be prescribed as an adjunct to periodontal therapy in the maintenance phase.

6.
Cureus ; 16(7): e63915, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39105035

RESUMEN

Malignant phyllodes tumors (MPTs) represent the most pernicious type of intralobular stromal proliferation known as a "fibroepithelial lesion" (FEL). They comprise a small fraction of breast malignancies and can present as either a pure MPT or sometimes include a heterologous component (liposarcoma, chondrosarcoma, osteosarcoma, or rhabdomyosarcoma). Of the fraction of MPTs that include heterologous components, very little about those with chondroblastic osteosarcomatous differentiation has been described in the literature. As such, a characteristic staining profile has yet to be established, even though morphological analysis is the cornerstone of diagnosis. The few reported cases have described a poor prognosis. Therefore, we present a case of MPT with chondroblastic osteosarcomatous differentiation to contribute to the dearth of literature examining this entity.

7.
Int J Biol Sci ; 20(9): 3334-3352, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38993557

RESUMEN

Type 2 diabetes mellitus (T2DM) increases the risk of non-alcoholic fatty liver disease (NAFLD) progression to advanced stages, especially upon high-fat diet (HFD). HFD-induced hepatic fibrosis can be marked by oxidative stress, inflammation, and activation of hepatic stellate cells. Sirtuin 1/2 (SIRT1/2), NAD-dependent class III histone deacetylases, are involved in attenuation of fibrosis. In our conducted research, TGF-ß1-activated LX-2 cells, free fatty acid (FFA)-treated simultaneous co-culture (SCC) cells, and HFD-induced hepatic fibrosis in Zucker diabetic fatty (ZDF) rats, a widely used animal model in the study of metabolic syndromes, were used to evaluate the protective effect of Tenovin-1, a SIRT1/2 inhibitor. ZDF rats were divided into chow diet, HFD, and HFD + Tenovin-1 groups. Tenovin-1 reduced hepatic damage, inhibited inflammatory cell infiltration, micro/ macro-vesicular steatosis and prevented collagen deposition HFD-fed rats. Tenovin-1 reduced serum biochemical parameters, triglyceride (TG) and malondialdehyde (MDA) levels but increased glutathione, catalase, and superoxide dismutase levels. Tenovin-1 mitigated proinflammatory cytokines IL-6, IL-1ß, TNFα and fibrosis biomarkers in HFD rats, TGF-ß1-activated LX-2 and FFA treated SCC cells. Additionally, Tenovin-1 suppressed SIRT1/2 expression and inhibited JNK-1 and STAT3 phosphorylation in HFD rats and FFA-treated SCC cells. In conclusion, Tenovin-1 attenuates hepatic fibrosis by stimulating antioxidants and inhibiting inflammatory cytokines under HFD conditions in diabetic rats.


Asunto(s)
Dieta Alta en Grasa , Cirrosis Hepática , Ratas Zucker , Sirtuina 1 , Sirtuina 2 , Animales , Dieta Alta en Grasa/efectos adversos , Ratas , Cirrosis Hepática/metabolismo , Cirrosis Hepática/tratamiento farmacológico , Cirrosis Hepática/inducido químicamente , Sirtuina 1/metabolismo , Sirtuina 2/metabolismo , Sirtuina 2/antagonistas & inhibidores , Masculino , Células Estrelladas Hepáticas/efectos de los fármacos , Células Estrelladas Hepáticas/metabolismo , Estrés Oxidativo/efectos de los fármacos
9.
Clin Transplant ; 38(7): e15395, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39023087

RESUMEN

BACKGROUND: Medical distrust may hinder kidney transplantation (KT) access. Among KT candidates evaluated for waitlisting, we identified factors associated with high distrust levels and quantified their association with waitlisting. METHODS: Among 812 candidates (2018-2023), we assessed distrust using the Revised Health Care System Distrust Scale across composite, competence, and values subscales. We used linear regression to quantify the associations between candidate and neighborhood-level factors and distrust scores. We used Cox models to quantify the associations between distrust scores and waitlisting. RESULTS: At KT evaluation, candidates who were aged 35-49 years (difference = 1.97, 95% CI: 0.78-3.16), female (difference = 1.10, 95% CI: 0.23-1.97), and Black (difference = 1.47, 95% CI: 0.47-2.47) were more likely to report higher composite distrust score. For subscales, candidates aged 35-49 were more likely to have higher competence distrust score (difference = 1.14, 95% CI: 0.59-1.68) and values distrust score (difference = 0.83, 95% CI: 0.05-1.61). Race/ethnicity (Black, difference = 1.42, 95% CI: 0.76-2.07; Hispanic, difference = 1.52, 95% CI: 0.35-2.69) was only associated with higher values distrust scores. Female candidates reporting higher rescaled values distrust scores (each one point) had a lower chance of waitlisting (aHR = 0.78, 95% CI: 0.63-0.98), whereas this association was not observed among males. Similarly, among non-White candidates, each 1-point increase in both rescaled composite (aHR = 0.87, 95% CI: 0.77-0.99) and values (aHR = 0.82, 95% CI: 0.68-0.99) distrust scores was associated with a lower chance of waitlisting, while there was no association among White candidates. CONCLUSION: Female, younger, and non-White candidates reported higher distrust scores. Values distrust may contribute to the long-standing racial/ethnic and gender disparities in access to KT. Implementing tailored strategies to reduce distrust in transplant care may improve KT access for groups that experience persistent disparities.


Asunto(s)
Trasplante de Riñón , Confianza , Listas de Espera , Humanos , Femenino , Masculino , Trasplante de Riñón/psicología , Persona de Mediana Edad , Adulto , Pronóstico , Estudios de Seguimiento , Fallo Renal Crónico/cirugía , Fallo Renal Crónico/psicología
10.
Cureus ; 16(6): e62345, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-39006594

RESUMEN

Edentulism can be treated with a removable or fixed prosthesis to improve aesthetics, comfort, and function. The firmness of the residual ridge is crucial for providing sufficient support for soft tissue. However, a flabby ridge lacks adequate tissue support, which poses challenges for clinicians during impression-making and prosthesis fabrication. Conventional prosthodontic approaches are typically used to manage flabby ridges. This article describes two methods for recording flabby ridges: surgical and unique impression techniques. In the first case, the patient was partially edentulous with a flabby ridge in the lower anterior region. This was removed surgically, and a prosthesis was made conventionally. There has been no relapse in treatment after a follow-up of almost one year. In the second case, the flabby ridge was there in the upper anterior region, which was first excised surgically, but the residual ridge was there; hence, the impression was made by the window technique. After a follow-up of almost nine months, there was a relapse in treatment where a flabby ridge was present in the anterior as well as posterior regions. Hence, again, a window impression was recorded, and a new prosthesis was given to the patient, which yielded satisfactory results. In this article, we have presented two cases of flabby ridges that were successfully treated with surgical and non-surgical techniques followed by special impression techniques. Such analogous cases provide dental professionals with insight into the different lines of treatment, relapse, and further management.

12.
J Assoc Physicians India ; 72(6): 69-73, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38881138

RESUMEN

OBJECTIVES: Antimicrobial resistance (AMR) is a major health issue. To determine trends in bacterial organisms in respiratory tract infections (RTIs) and their antibiotic sensitivity at a tertiary care center in India, we performed this study. METHODS: Successive samples received from January 2017 to December 2021 from the respiratory tract (sputum, endotracheal secretion, and bronchoalveolar lavage) from intensive care units and medical inpatients were processed for bacterial growth. The identification of isolates and antibiotic sensitivity patterns was performed using an automated VITEK-2 system. Descriptive statistics are reported. RESULTS: We received 7,204 respiratory samples. Significant bacterial growth was in 3,000 (41.6%), and 2,992 (41.5%) were gram-negative. Klebsiella pneumoniae was the most prevalent, followed by Pseudomonas aeruginosa, Acinetobacter baumannii, Escherichia coli, and Enterobacter aerogenes. Increasing secular trends were observed for Klebsiella and Pseudomonas and declining trends for Acinetobacter and Escherichia (p < 0.05). Antimicrobial sensitivity patterns showed that Klebsiella, Pseudomonas, Acinetobacter, E. coli, and Enterobacter had a high sensitivity with colistin and polymyxin (99-100%). Moderate sensitivity was observed with carbapenems (Acinetobacter: 47.5%, Enterobacter: 62.0%, Escherichia: 76.5%, Klebsiella: 72.3%, Pseudomonas: 66.7%) and tigecycline (Acinetobacter: 50.4%, Enterobacter: 68.0%, Escherichia: 81.1%, Klebsiella: 66.6%, Pseudomonas: 0%). Aminoglycosides had <50% sensitivity for various organisms, and <25% sensitivity was observed with third-generation cephalosporins and quinolones. Trend analysis showed persistent sensitivity of various pathogenic bacteria to colistin and polymyxin and declining pharmacological sensitivity in Acinetobacter (carbapenems and tigecycline), Escherichia (carbapenems, quinolones, and tigecycline), Klebsiella (carbapenems, quinolones, aminoglycosides, and tigecycline), and Pseudomonas (carbapenems and aminoglycosides) species (p < 0.05). CONCLUSION: Common respiratory tract gram-negative bacterial pathogens at a tertiary care hospital are K. pneumoniae, P. aeruginosa, A. baumannii, and E. coli. All these bacteria demonstrate high sensitivity only with colistin and polymyxin. Significant AMR is observed to carbapenems, tigecycline, aminoglycosides, and third-generation cephalosporins. Secular trends show declining antimicrobial sensitivity among various bacterial pathogens.


Asunto(s)
Antibacterianos , Pruebas de Sensibilidad Microbiana , Infecciones del Sistema Respiratorio , Centros de Atención Terciaria , Humanos , Infecciones del Sistema Respiratorio/microbiología , Infecciones del Sistema Respiratorio/tratamiento farmacológico , Antibacterianos/farmacología , India/epidemiología , Farmacorresistencia Bacteriana , Bacterias Gramnegativas/efectos de los fármacos , Bacterias Gramnegativas/aislamiento & purificación
13.
Immunol Res ; 2024 Jun 15.
Artículo en Inglés | MEDLINE | ID: mdl-38879717

RESUMEN

Adjuvants were used to modulate response towards relevant immune cells. The present study aims to investigate FlaA-conjugated Per a 10 and T cell peptides in amelioration of allergic airway disease in mice. Mice given Per a 10 showed allergic features with higher cellular infiltration, IgE, Th-2 cytokines and alarmins. Fusion protein treatment reduced lung inflammation (p < 0.0001) and cellular infiltrates (p < 0.001) with higher IgG2a/IgE indicating resolution of disease. Immunotherapy with FPT1 and FPT3 reduces IL-4, IL-5 and IL-13 levels (p < 0.0001) with a fourfold increase in IFN-γ secretion in BALF. FPT1- and FPT3-treated mice have increased IL-10 and TGF-ß levels (p < 0.001) with CD4+Foxp3+ T cells (p < 0.01) indicating Treg response. There was enhanced expression of claudin-1 (1.7-fold) and occludin (fourfold) in lungs of FPT1- and FPT3-treated mice with reduced TSLP (p < 0.01) and IL-33 (p < 0.0001) secretion in BALF indicating recovery of epithelial function. Peptide-conjugated FlaA proteins showed protective immunity in mice and have potential for immunotherapy with restoration of cellular function.

14.
Cureus ; 16(5): e61173, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38933634

RESUMEN

Head and neck cancers (HNCs) are malignant tumors mainly from squamous cells in the head and neck tissues. Treatment involves a multidisciplinary approach with surgery, radiotherapy, and chemotherapy. However, the long-term prognosis for patients with advanced-stage tumors is guarded, with a median survival time of approximately 24 months. HNC patients have very high rates of depression and anxiety and the highest suicide rate among all cancers due to the intense and challenging nature of the treatment, underscoring the importance of our collective efforts. Rehabilitation success depends on various factors, including tumor, patient, and treatment-related factors. Patients may require post-treatment oral rehabilitation measures, including implants, obturators, and flexible dentures. These measures are crucial, but they often need to be more utilized. Patients may face challenges in maintaining oral hygiene and managing mucositis. Additionally, it is essential to address other intricacies such as trismus, xerostomia, gustatory dysfunctions, neuropathy, speech impairments, and psychological disturbances. Unfortunately, there is little literature on post-treatment rehabilitative measures. Despite its crucial role in improving patients' quality of life, rehabilitation often receives inadequate attention compared to treatment. Our narrative review, which covers various factors that affect rehabilitation, including oral rehabilitation measures and post-treatment complications, is anticipated to deliver practical insights to professionals and inspire positive changes in their regular practice.

16.
Cureus ; 16(5): e60431, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38883012

RESUMEN

Background Dental age estimation plays an enormous role in the determination of an individual's identity and age in forensic and anthropological fields. The estimation of the chronological age of the individual is also important in the diagnosis, treatment planning, and treatment outcomes in the dental field. The third molar has some inimitable characteristics in terms of its size, shape, formation, and long path of eruption and usually erupts after puberty, which seems to be a reliable method of age estimation in adulthood. To establish the individual's identity, inference of age has gained considerable attention in forensics, and the aspect of dentistry has broadened nowadays. Thus the present study was conducted. Methodology The digital orthopantomograms of 720 patients who were exposed to X-rays for routine examination were assessed, and calcification of the tooth was observed. In order to ensure the blinding of the examiners, radiographs were numerically coded. Clinical stages of the tooth were categorised into erupted, pre-erupted, and missing. Statistical analysis was performed by IBM SPSS Statistics for Windows, Version 25.0 (IBM Corp., Armonk, NY), with a level of significance set below 5%. Results The age of the patients whose OPGs were assessed ranged from 6 to 22 years, with a mean age of 18.93±3.129 years. Among the 720 participants, 370 (51.4%) were male and 350 (48.6%) were female. When the clinical status of the third molar among all the participants was assessed, in 148 (20.6%) subjects, third molars had erupted; in 188 (26.1%) subjects, the third molars were in the pre-erupted stage; and in 384 (53.30%), third molars were missing. When comparing the clinical status of the third molar in both arches and between genders, it was found that missing molars were common in females and the mandible arch, with statistically significant p-values. A comparison of Demirjian's stages between genders showed that the mean age to attain stage H was 21.37±0.774 years among males and 21.69±0.616 years among females. This means that the calcification of third-molar attainment occurs earlier in males compared with females. In a similar comparison between the upper and lower arches, it was found that calcification of the third molar was attained earlier in the maxillary arch compared to the mandibular arch. Conclusion It was concluded that the third molar is a versatile tooth and its path of mineralization can be used in orthodontics, pedodontics, and forensics to estimate chronological age, and chronological age significantly follows Demirjian's stages of third molar calcification. Third molar calcification occurred earlier in the maxillary arch and males, whereas several impacted molars were higher in females.

17.
J Maxillofac Oral Surg ; 23(3): 574-580, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38911423

RESUMEN

Background: Surgical removal of the mandibular third molar requires reflection of the mucoperiosteal flap. Several studies have suggested different varieties and innovative designs for flap reflection. We have designed a randomized controlled trial (RCT) to check the feasibility of two flap designs: lingual-based triangular flap (LBTF) and buccal-based triangular flap (BBTF) by calculating the duration of surgery and evaluating postoperative complications such as pain, swelling, and trismus. Materials and Method: It was a non-inferiority parallel-group RCT. The trial was registered in the Control Trial Register of India (CTRI/2021/10/037182) and was performed according to Consolidated Standards of Registered Trial (CONSORT) guidelines. Intraoperative surgery time and postoperative pain, swelling, and trismus were measured and analyzed by a two-sample t test. The Chi-square test was used to measure gender distribution in the study. Result: Of the total of 88 required subjects, gender distribution and performed surgical time were statistically insignificant with a p-value of 0.76 and 0.48, respectively. The pain was significantly higher in the LBTF group in the 5th and 7th postoperative days with a p-value of 0.02 and 0.028. The swelling was statistically higher during all the follow-ups except for the 28th day in the LBTF group with values of 0.006, 0.002 and 0.003, respectively. There was no significant difference in inter-incisional distance (IID) between the groups during postoperative check-ups. Conclusion: LBTF shows no edge over BBTF during mandibular third molar disimpaction.

18.
Med Biol Eng Comput ; 62(10): 3151-3161, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-38787486

RESUMEN

The gastrointestinal (GI) peristalsis is an involuntary wave-like contraction of the GI wall that helps to propagate food along the tract. Many GI diseases, e.g., gastroparesis, are known to cause motility disorders in which the physiological contractile patterns of the wall get disrupted. Therefore, to understand the pathophysiology of these diseases, it is necessary to understand the mechanism of GI motility. We present a coupled electromechanical model to describe the mechanism of GI motility and the transduction pathway of cellular electrical activities into mechanical deformation and the generation of intraluminal pressure (IP) waves in the GI tract. The proposed model consolidates a smooth muscle cell (SMC) model, an actin-myosin interaction model, a hyperelastic constitutive model, and a Windkessel model to construct a coupled model that can describe the origin of peristaltic contractions in the intestine. The key input to the model is external electrical stimuli, which are converted into mechanical contractile waves in the wall. The model recreated experimental observations efficiently and was able to establish a relationship between change in luminal volume and pressure with the compliance of the GI wall and the peripheral resistance to bolus flow. The proposed model will help us understand the GI tract's function in physiological and pathophysiological conditions.


Asunto(s)
Tracto Gastrointestinal , Modelos Biológicos , Presión , Tracto Gastrointestinal/fisiología , Humanos , Peristaltismo/fisiología , Motilidad Gastrointestinal/fisiología , Animales , Miosinas/metabolismo , Contracción Muscular/fisiología , Miocitos del Músculo Liso/fisiología
19.
J Mech Behav Biomed Mater ; 155: 106560, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38744120

RESUMEN

The mechanical attributes of soft tissues within the gastrointestinal (GI) tract are crucial for the effective operation of the GI system, and alterations in these properties may play a role in motility-related disorders. Various constitutive modeling approaches have been suggested to comprehend the response of soft tissues to diverse loading conditions. Among these, hyperelastic constitutive models based on finite elasticity have gained popularity. However, these models fall short in capturing rate- and time-dependent tissue properties. In contrast, finite viscoelastic models offer a solution to overcome these limitations. Nevertheless, the development of a suitable finite viscoelastic model, coupled with a variational formulation for efficient finite element (FE) implementation, remains an ongoing challenge. This study aims to address this gap by developing diverse finite viscoelastic constitutive relations and applying them to characterize soft tissue. Furthermore, the research explores the creation of compressible, nearly incompressible, and incompressible versions of viscoelastic constitutive relations, along with their variational formulation, to facilitate efficient FE implementation. The proposed model demonstrates remarkable accuracy in replicating experimental results, achieving an R2 value exceeding 0.99.


Asunto(s)
Elasticidad , Análisis de Elementos Finitos , Tracto Gastrointestinal , Viscosidad , Tracto Gastrointestinal/fisiología , Fenómenos Biomecánicos , Modelos Biológicos , Humanos
20.
Cureus ; 16(3): e56964, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38665712

RESUMEN

Background Invasive blood sample collection followed by high-performance liquid chromatography (HPLC) based analysis is the gold standard for estimating glycated hemoglobin level or HbA1c currently. Spectrophotometry could be an alternative that holds the potential to be translated into a portable, non-invasive device for glycated hemoglobin level estimation. This study compares HbA1c values obtained from HPLC and spectrophotometry. Methods Venous blood samples were collected from both diabetic and non-diabetic participants in a cross-sectional study. The samples were subjected to both HPLC and spectrophotometry-based estimation of HbA1c%. The results obtained were compared, and the relationship between the two estimations were assessed. Results About 15 diabetic and non-diabetic individuals participated in the study and 28 samples were included in the final analysis. The Pearson's correlation coefficient was 0.65 (95% CI, 0.37-0.82), indicating that there was a strong positive association. This was further supported by the findings from linear regression analysis with a p-value of <0.001. Conclusions The positive correlation between the HPLC and spectrophotometric values supports the hypothesis that spectrophotometry could be an alternative to conventional HPLC for the measurement of HbA1c. This needs to be further validated through larger, well-powered studies.

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