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1.
Funct Integr Genomics ; 24(2): 74, 2024 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-38600306

RESUMO

Crop production is increasingly threatened by the escalating weather events and rising temperatures associated with global climate change. Plants have evolved adaptive mechanisms, including stress memory, to cope with abiotic stresses such as heat, drought, and salinity. Stress memory involves priming, where plants remember prior stress exposures, providing enhanced responses to subsequent stress events. Stress memory can manifest as somatic, intergenerational, or transgenerational memory, persisting for different durations. The chromatin, a central regulator of gene expression, undergoes modifications like DNA acetylation, methylation, and histone variations in response to abiotic stress. Histone modifications, such as H3K4me3 and acetylation, play crucial roles in regulating gene expression. Abiotic stresses like drought and salinity are significant challenges to crop production, leading to yield reductions. Plant responses to stress involve strategies like escape, avoidance, and tolerance, each influencing growth stages differently. Soil salinity affects plant growth by disrupting water potential, causing ion toxicity, and inhibiting nutrient uptake. Understanding plant responses to these stresses requires insights into histone-mediated modifications, chromatin remodeling, and the role of small RNAs in stress memory. Histone-mediated modifications, including acetylation and methylation, contribute to epigenetic stress memory, influencing plant adaptation to environmental stressors. Chromatin remodeling play a crucial role in abiotic stress responses, affecting the expression of stress-related genes. Small RNAs; miRNAs and siRNAs, participate in stress memory pathways by guiding DNA methylation and histone modifications. The interplay of these epigenetic mechanisms helps plants adapt to recurring stress events and enhance their resilience. In conclusion, unraveling the epigenetic mechanisms in plant responses to abiotic stresses provides valuable insights for developing resilient agricultural techniques. Understanding how plants utilize stress memory, histone modifications, chromatin remodeling, and small RNAs is crucial for designing strategies to mitigate the impact of climate change on crop production and global food security.


Assuntos
Regulação da Expressão Gênica de Plantas , Histonas , Histonas/genética , Histonas/metabolismo , Plantas/genética , Metilação de DNA , Estresse Fisiológico/genética
2.
Biopolymers ; 115(4): e23586, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38747448

RESUMO

Cellulose nanofibers, a sustainable and promising material with widespread applications, exhibit appreciable strength and excellent mechanical and physicochemical properties. The preparation of cellulosic nanofibers from food or agricultural residue is not sustainable. Therefore, this study was designed to use three halophytic plants (Cressa cretica, Phragmites karka, and Suaeda fruticosa) to extract cellulose for the subsequent conversion to cellulosic nanofibers composites. The other extracted biomass components including lignin, hemicellulose, and pectin were also utilized to obtain industrially valuable enzymes. The maximum pectinase (31.56 IU mL-1), xylanase (35.21 IU mL-1), and laccase (15.89 IU mL-1) were produced after the fermentation of extracted pectin, hemicellulose, and lignin from S. fruticosa, P. karka, and C. cretica, respectively. Cellulose was methylated (with a degree of substitution of 2.4) and subsequently converted into a composite using polyvinyl alcohol. Scanning electron microscopy and Fourier-transform infrared spectroscopy confirmed the successful synthesis of the composites. The composites made up of cellulose from C. cretica and S. fruticosa had a high tensile strength (21.5 and 15.2 MPa) and low biodegradability (47.58% and 44.56%, respectively) after dumping for 3 months in soil, as compared with the composite from P. karka (98.79% biodegradability and 4.9 MPa tensile strength). Moreover, all the composites exhibited antibacterial activity against gram-negative bacteria (Escherichia coli and Klebsiella pneumoniae) and gram-positive bacteria (Staphylococcus aureus). Hence, this study emphasizes the possibility for various industrial applications of biomass from halophytic plants.


Assuntos
Celulose , Celulose/química , Plantas Tolerantes a Sal/química , Plantas Tolerantes a Sal/metabolismo , Lignina/química , Resistência à Tração , Antibacterianos/farmacologia , Antibacterianos/química , Antibacterianos/isolamento & purificação , Poligalacturonase/metabolismo , Poligalacturonase/química , Espectroscopia de Infravermelho com Transformada de Fourier , Lacase/metabolismo , Lacase/química , Nanofibras/química , Pectinas/química , Pectinas/isolamento & purificação , Pectinas/metabolismo , Chenopodiaceae/química , Chenopodiaceae/metabolismo , Polissacarídeos/química , Polissacarídeos/isolamento & purificação , Endo-1,4-beta-Xilanases/metabolismo , Endo-1,4-beta-Xilanases/química
3.
Mol Biol Rep ; 50(1): 349-359, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36331749

RESUMO

BACKGROUND: Carrot is the most important vegetable in Apiaceae family, and it is consumed globally due to its high nutritional quality. Drought stress is major environmental constraint for vegetables especially carrot. Limited data is available regarding the mechanisms conferring drought tolerance in carrot. Methods and Results Eight commercial carrot cultivars were used in this study and subjected to drought stress under semi-controlled greenhouse conditions. Biochemical, antioxidant enzymatic activity and changes in transcript level of drought related genes was estimated, the gene expression analysis was done by using qRT-PCR in comparison with reference gene expression Actin (Act1). Results revealed that cultivars Coral Orange, Tendersweet and Solar Yellow were tolerant to drought stress, which was supported by their higher transcript levels of catalase gene (CAT), superoxide dismutase genes (Cu/ZN-SOD, Cu/Zn-SDC) in these cultivars. The downregulation of PDH1 gene (Proline dehydrogenase 1) was also observed that was associated with upregulation of proline accumulation in carrot plants. Moreover, results also suggested that PRT genes (Proline transporter genes) played a key role in drought tolerance in carrot cultivars. Conclusion Among the cultivars studied, Coral Orange showed overall tolerance to drought stress conditions, whereas cultivars Cosmic Purple and Eregli Black were sensitive based on their biochemical and gene expression levels. According to our knowledge, this is the first comparative study on drought tolerance in several carrot cultivars. It will provide a background for carrot breeding to understand biochemical and molecular responses of carrot plant to drought stress and mechanisms behind it.


Assuntos
Daucus carota , Daucus carota/genética , Daucus carota/metabolismo , Secas , Melhoramento Vegetal , Perfilação da Expressão Gênica , Expressão Gênica , Regulação da Expressão Gênica de Plantas/genética , Estresse Fisiológico/genética
4.
Artigo em Inglês | MEDLINE | ID: mdl-37700688

RESUMO

Non-cystic fibrosis (non-CF) bronchiectasis has emerged as a significant respiratory disease in developing countries. Given the variation in causes and clinical characteristics across different regions, it is necessary to conduct studies in regions with limited data such as low-middle income countries (LMIC). The aim of the study was to investigate the underlying causes, clinical presentation, etiology, lung function and imaging in patients with bronchiectasis who sought treatment at a tertiary care hospital in a LMIC. We conducted retrospective observational study at the Aga Khan University, Pakistan. Adult patients diagnosed with non-CF bronchiectasis on high-resolution computed tomography scan between 2000 and 2020 were included. We evaluated the etiology, clinical characteristics, microbiology, radiology and spirometric pattern of these patients. A total of 340 patients were included with 56.5% being female and 44.7% aged over 60 years. Among them, 157 (46.2%) had experienced symptoms for 1-5 years. The most common spirometric pattern observed was obstructive impairment (58.1%). Previous tuberculosis (TB) (52.94%) was the most common etiology followed by allergic bronchopulmonary aspergillosis (7.64%). Bilateral lung involvement on HRCT scan was found in 63.2% of patients. Pseudomonas aeruginosa was the most frequently identified organism (38.75%) among 240 patients with available specimens. Patients with P. aeruginosa infections had a significantly higher number of exacerbations (p=0.016). There was a significant difference (p<0.001) in P. aeruginosa growth among different etiologies. In conclusion, post-TB bronchiectasis was the most common cause of non-CF bronchiectasis in our study population. P. aeruginosa was the predominant organism, and 63.2% of the patients exhibited bilateral lung involvement. Since P. aeruginosa growth and extensive lung involvement have been associated with poor prognosis and increased mortality risk, we recommend close follow ups of these patients to improve quality of life and survival in developing countries like Pakistan.

5.
Funct Integr Genomics ; 22(4): 697-710, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35590117

RESUMO

Carrot is one of the nutritious vegetable crops sensitive to drought stress resulting in loss of quality and yield. There are a lot of studies on detailed molecular mechanisms of drought stress response of main crops; however, very little information available on vegetables, including carrots. Hence, in this study, we investigated root transcriptome profiles from the meristematic region of two contrasting purple carrot (B7262A, drought tolerant; P1129, drought sensitive) lines under varying stress levels (85% and 70%) by using RNA-Seq technique. The morpho-physiological and biochemical response of B7262A line exhibited tolerance behavior to both DS (85% and 70%). RNA-Seq analysis revealed that 15,839 genes were expressed commonly in both carrot lines. The carrot line B7262A showed regulation of 514 genes in response to 85% DS, whereas P1129 showed differential regulation of 622 genes under 70% DS. The B7262A carrot line showed higher upregulation of transcripts that suggested its resilient behavior contrary to P1129 line. Furthermore, validation of transcript gene by qRT-PCR also confirmed the RNA-Seq analysis resulting in elevated expression levels of MYB48 transcription factor, MAPK mitogen-activated protein kinase ANP1, GER geraniol 8-hydroxylase, ABA ABA-induced in somatic embryo 3, FBOX putative F-box protein, FRO ferric reduction oxidase, and PDR probable disease resistance protein. Current study provided unprecedented insights of purple carrot lines that can be potentially exploited for the screening and development of resilient carrot.


Assuntos
Daucus carota , Secas , Daucus carota/genética , Perfilação da Expressão Gênica/métodos , Regulação da Expressão Gênica de Plantas , Meristema/genética , Melhoramento Vegetal , Estresse Fisiológico/genética , Transcriptoma
6.
Respirology ; 27(9): 720-729, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35692074

RESUMO

Since the publication of a sham-controlled, randomized trial (AIR2) and subsequent marketing approval by the US Food and Drug Administration, we have significantly advanced our understanding of bronchial thermoplasty (BT)'s scientific basis, long-term safety, clinical efficacy and cost-effectiveness. In particular, the last 2 years have witnessed multiple research publications on several of these counts. In this review, we critically appraise our evolving understanding of BT's biologic underpinnings and clinical impact, offer an evidence-based patient workflow guide for the busy pulmonologist and highlight both current challenges as well as potential solutions for the researcher and the clinician.


Assuntos
Asma , Termoplastia Brônquica , Asma/cirurgia , Brônquios/cirurgia , Análise Custo-Benefício , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento
7.
Molecules ; 27(3)2022 Jan 22.
Artigo em Inglês | MEDLINE | ID: mdl-35163984

RESUMO

Flavanols, a common class of secondary plant metabolites, exhibit several beneficial health properties by acting as antioxidant, anticarcinogen, cardioprotective, anti-microbial, anti-viral, and neuroprotective agents. Furthermore, some flavanols are considered functional ingredients in dairy products. Based on their structural features and health-promoting functions, flavanols have gained the attention of pharmacologists and botanists worldwide. This review collects and summarizes 121 flavanols comprising four categories: flavan-3-ols, flavan-4-ols, isoflavan-4-ols, and flavan-3,4-ols. The research of the various structural features and pharmacological activities of flavanols and their derivatives aims to lay the groundwork for subsequent research and expect to provide mentality and inspiration for the research. The current study provides a starting point for further research and development.


Assuntos
Anti-Infecciosos/farmacologia , Antioxidantes/farmacologia , Produtos Biológicos/farmacologia , Cardiotônicos/farmacologia , Flavonoides/farmacologia , Fármacos Neuroprotetores/farmacologia , Compostos Fitoquímicos/farmacologia , Humanos
8.
J Pak Med Assoc ; 71(12): 2817-2819, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35150546

RESUMO

The artery of Percheron is a rare variant of the posterior cerebral circulation. It is characterised by a single arterial trunk that supplies blood to bilateral paramedian thalami and rostral midbrain. Its occlusion can have a very wide range of presentation, and initial imaging including CT of the head maybe normal. Diagnosis and eventual treatment is usually delayed. We describe the case of an elderly man who presented with loss of consciousness, aphasia, and bilateral lower limb weakness. He was diagnosed with bilateral thalamic infarction due to the occlusion of the artery of Percheron only after an MRI of the brain was performed. Despite treatment his symptoms did not resolve completely.


Assuntos
Artérias , Infarto Cerebral , Idoso , Infarto Cerebral/diagnóstico por imagem , Infarto Cerebral/etiologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Mesencéfalo , Tálamo/diagnóstico por imagem
9.
J Ayub Med Coll Abbottabad ; 29(1): 154-156, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28712198

RESUMO

pancreatitis appears to exist in the presence of such calculi upon radiology. Having said that, pancreatic ductal stone due to biliary causes (origin), in face of acute pancreatitis, is rare. To the best of our knowledge this was the first case of its kind presented to our hospital in recent past. A 25-year-old female presented to the emergency department of our hospital with an acute episode of pancreatitis. Computerized tomography (CT) scan, endoscopic retrograde cholangiopancreatography (ERCP) & magnetic resonance cholangiopancreatography (MRCP) concluded acute pancreatitis (AP) with dilated main pancreatic duct left side branches and intra ductal calculi. The findings were not suggestive of any chronic pancreatitis. Conservative treatment was given for the episodic attack of AP. After the episode resolved, an exploration and extraction of the pancreatic ductal calculus was performed successfully. The pancreatic duct stones were removed by lateral pancreaticojejunostomy (partington-rochelle procedure). The patient made a remarkable recovery after the procedure and was perfectly healthy and well-oriented in time and space at 4-months follow up. Acute pancreatitis is an inflammatory condition of pancreas, when, associated with pancreatic duct stones a lateral pancreaticojejunostomy is done, which, results in better outcomes decreasing the mortality and morbidity. Acute pancreatitis due to ductal calculi is rare for which extraction is safe after resolution of the episode of AP. Studies need to be carried out to look for the outcome and the effectiveness of the procedure, when, specifically and specially done for this condition.


Assuntos
Cálculos/complicações , Cálculos/diagnóstico por imagem , Ductos Pancreáticos , Pancreatite/etiologia , Doença Aguda , Adulto , Cálculos/cirurgia , Colangiopancreatografia Retrógrada Endoscópica , Feminino , Humanos , Pancreaticojejunostomia , Pancreatite/diagnóstico por imagem , Pancreatite/cirurgia , Tomografia Computadorizada por Raios X
10.
J Ayub Med Coll Abbottabad ; 28(4): 816-817, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28586583

RESUMO

Eales disease is an eponym after a British ophthalmologist Henry Eales. The aetiology behind Eales disease is ill-understood and stands controversial. Various systemic diseases associated with peripheral retinal revascularization and Retinal vasculitis could imitate the proliferative and inflammatory phases of Eales' disease, respectively. We present a case of a 30 years old female patient with Eales disease and discuss the clinical features, treatment plan and its outcome in our patient. Tuberculosis appears to be the cause of Eales disease but the relation is yet to be established and clinically proven. Steroid therapy is usually the main stay of treatment with tapering doses of systemic corticosteroids. Other interventions are vitrectomy, photocogulation or cryotherapy.


Assuntos
Neovascularização Patológica/diagnóstico , Vasculite Retiniana/diagnóstico , Adulto , Antituberculosos/uso terapêutico , Feminino , Glucocorticoides/uso terapêutico , Humanos , Neovascularização Patológica/tratamento farmacológico , Prednisolona/uso terapêutico , Vasculite Retiniana/tratamento farmacológico , Tuberculose/diagnóstico , Tuberculose/tratamento farmacológico
11.
J Ayub Med Coll Abbottabad ; 28(3): 620-622, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28712251

RESUMO

Pleomorphic adenoma is the most common benign tumour of salivary glands which is Known for its wide pleomorphic architecture. It accounts for 45-75% of all salivary gland neoplasm. It can involve major as well as minor salivary glands. Among minor salivary glands (5-10% of cases) the palate lip, nasal cavity, pharynx, larynx and trachea are the most common sites. Diagnosis is made with biopsy along with histopathology. Wide excision with biopsy and removal of underlying extension of tumour is the treatment of choice. Sixty years old farmer presented with painless swelling in the upper lip for the last 8 years. History revealed recurrent mass in the midline of upper lip with no other complaints. He was operated 3 times for this complaint in the past. Belonging to poor socioeconomic status no biopsy records were found. On examination 3×4 cm hard and mobile mass was found. Lymph nodes of head and neck and parotid gland revealed no enlargement. Surgery by wide excision was planned. After baseline investigation surgery was done and the mass sent for histopathology. Biopsy reports showed pleomorphic adenoma on unusual site. Dissection of salivary gland tumour is important as they have propensity to metastasize. Wide local excision along with biopsy is the method of choice. Proper surgical techniques are required to avoid recurrence.


Assuntos
Adenoma Pleomorfo/patologia , Neoplasias das Glândulas Salivares/patologia , Glândulas Salivares Menores/patologia , Humanos , Masculino , Pessoa de Meia-Idade
12.
Asian Pac J Cancer Prev ; 25(3): 813-820, 2024 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-38546064

RESUMO

BACKGROUND: Human papillomavirus (HPV) vaccine is the most effective option for primary prevention HPV, a well-known cause of cervical cancer.  The objective of the study was to assess awareness of HPV, the acceptability of its vaccine and factors associated with the acceptability among the adult population in Pakistan. MATERIALS & METHODS: A cross-sectional survey was conducted among adult population of Pakistan from January 2022 and March 2022. Due to the ongoing COVID-19 pandemic, instead of face-to-face interviews, a self-administered questionnaire was developed and distributed through Google Forms. The questionnaire was available in both English and Urdu languages to cater to a diverse population. RESULTS: Overall, 313 (65.2 %) study participants had heard about HPV infection, while 297 (61.9%) knew HPV as the cause of genital warts and 256 (53.3 %) knew that HPV can cause any type of cancer, with a higher percentage of awareness among those who were in any health care setting compared to those who were in a non-healthcare setting. Regarding the acceptability to get HPV vaccine, 320 (66.7%) of the study participants were willing to get vaccinated, while only 15(3.1%) of the study population had previously received HPV vaccine. The most important factors associated with HPV vaccine acceptability were younger age of 18-25 years (Prevalence Ratio (PR) =1.60, 95% Confidence Interval (CI) =1.11, 2.32), and 26-35 years (PR= 1.65, 95% CI=1.09, 2.50). HPV vaccine acceptability was also associated with working in a healthcare setting due to better awareness of HPV vaccine (PR= 1.29, 95% CI=1.03, 1.62). CONCLUSION: It is important to address the knowledge gaps existing in the community about HPV vaccine acceptability and barriers against it for the successful rollout of the HPV vaccination program in Pakistan. Mass awareness campaigns about HPV, HPV vaccine, and cervical cancer are needed to increase the acceptability of HPV vaccine among public at the time of reintroducing HPV vaccine.


Assuntos
Infecções por Papillomavirus , Vacinas contra Papillomavirus , Neoplasias do Colo do Útero , Adulto , Feminino , Humanos , Adolescente , Adulto Jovem , Estudos Transversais , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/prevenção & controle , Neoplasias do Colo do Útero/epidemiologia , Neoplasias do Colo do Útero/prevenção & controle , Paquistão/epidemiologia , Pandemias , Conhecimentos, Atitudes e Prática em Saúde , Vacinação , Aceitação pelo Paciente de Cuidados de Saúde , Inquéritos e Questionários
13.
World Neurosurg ; 187: e1106-e1111, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38759782

RESUMO

OBJECTIVE: To evaluate the current state of neurosurgical care in Central Asia, identify the challenges and advancements, and propose recommendations to improve neurosurgical capabilities and access in Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan. METHODS: A comprehensive review of the neurosurgical infrastructure, availability of neurosurgeons, technological advancements, and healthcare policies in the five Central Asian countries. Analysis included published literature, healthcare reports, and expert opinions to assess the state of neurosurgical care and identify areas for improvement. RESULTS: Significant variation in neurosurgical care was observed across the region. Kazakhstan showed notable advancements, including an increased number of neurosurgeons and progress in specialized fields such as vascular neurosurgery and brain tumor management. Other countries, like Uzbekistan, Tajikistan, and Kyrgyzstan, made strides in improving neurosurgical care but still faced substantial challenges. Common issues included a shortage of neurosurgeons, limited facilities, and inadequate access to modern technology. The lack of research data further highlighted the need for urgent intervention. CONCLUSIONS: To enhance neurosurgical care in Central Asia, a multipronged approach involving targeted investments, policy reforms, international collaborations, and knowledge sharing is recommended. This includes establishing specialized neurosurgical training programs and fellowships, investing in infrastructure and technology, fostering international collaborations for training and research, introducing early neurosurgery education in medical schools, improving access to online education resources, and promoting telemedicine for consultations and follow-up care. These measures are necessary to expand access to essential neurosurgical care and improve outcomes in the regions.


Assuntos
Neurocirurgia , Procedimentos Neurocirúrgicos , Humanos , Neurocirurgia/educação , Ásia Central , Neurocirurgiões
14.
Stress Biol ; 3(1): 55, 2023 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-38079026

RESUMO

Drought stress is a significant environmental factor that adversely affects the growth and development of carrot (Daucus carota L.), resulting in reduced crop yields and quality. Drought stress induces a range of physiological and biochemical changes in carrots, including reduced germination, hindered cell elongation, wilting, and disrupted photosynthetic efficiency, ultimately leading to stunted growth and decreased root development. Recent research has focused on understanding the molecular mechanisms underlying carrot's response to drought stress, identifying key genes and transcription factors involved in drought tolerance. Transcriptomic and proteomic analyses have provided insights into the regulatory networks and signaling pathways involved in drought stress adaptation. Among biochemical processes, water scarcity alters carrot antioxidant levels, osmolytes, and hormones. This review provides an overview of the effects of drought stress on carrots and highlights recent advances in drought stress-related studies on this crop. Some recent advances in understanding the effects of drought stress on carrots and developing strategies for drought stress mitigation are crucial for ensuring sustainable carrot production in the face of changing climate conditions. However, understanding the mechanisms underlying the plant's response to drought stress is essential for developing strategies to improve its tolerance to water scarcity and ensure food security in regions affected by drought.

15.
Cureus ; 15(11): e48696, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-38090457

RESUMO

Aortic intramural hematoma (IMH) is characterized by blood spilling through the intimal layer of the aortic wall without any tear within the aortic wall. The condition has been troublesome to analyze until of late. A 55-year-old gentleman with hypertension presented with epigastric pain radiating to the back, he later developed back pain as well as bilateral lower limb numbness and was found to have IMH when a CT angiogram was conducted. Due to the severity of the illness, the patient expired on the 10th day of the admission. It is important for physicians to be aware of atypical presentations of this life-threatening aortic disease.

16.
Cureus ; 15(2): e35159, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36950004

RESUMO

Sjögren-Larsson syndrome (SLS) is a rare, inherited disorder passed down through families in an autosomal recessive pattern. Its main characteristics are spastic diplegic paralysis, congenital ichthyotic hyperkeratosis, and mild-to-moderate mental retardation. Lack of activity of microsomal fatty aldehyde dehydrogenase (FALDH) or its complete absence is the primary cause of this syndrome, leading to the build-up of fatty aldehydes and fatty alcohols in the body, particularly in the skin. In order to provide the best care for patients, educating them about the management of dry skin and offering genetic counseling are essential. We hereby present a case of an eight-year-old patient with spastic diplegia, congenital ichthyosis, and intellectual disability diagnosed with SLS.

17.
Precis Chem ; 1(6): 341-356, 2023 Aug 28.
Artigo em Inglês | MEDLINE | ID: mdl-37654807

RESUMO

Engineered nanomaterials (ENMs) with different topographies provide effective nano-bio interfaces for controlling the differentiation of stem cells. The interaction of stem cells with nanoscale topographies and chemical cues in their microenvironment at the nano-bio interface can guide their fate. The use of nanotopographical cues, in particular nanorods, nanopillars, nanogrooves, nanofibers, and nanopits, as well as biochemical forces mediated factors, including growth factors, cytokines, and extracellular matrix proteins, can significantly impact stem cell differentiation. These factors were seen as very effective in determining the proliferation and spreading of stem cells. The specific outgrowth of stem cells can be decided with size variation of topographic nanomaterial along with variation in matrix stiffness and surface structure like a special arrangement. The precision chemistry enabled controlled design, synthesis, and chemical composition of ENMs can regulate stem cell behaviors. The parameters of size such as aspect ratio, diameter, and pore size of nanotopographic structures are the main factors for specific termination of stem cells. Protein corona nanoparticles (NPs) have shown a powerful facet in stem cell therapy, where combining specific proteins could facilitate a certain stem cell differentiation and cellular proliferation. Nano-bio reactions implicate the interaction between biological entities and nanoparticles, which can be used to tailor the stem cells' culmination. The ion release can also be a parameter to enhance cellular proliferation and to commit the early differentiation of stem cells. Further research is needed to fully understand the mechanisms underlying the interactions between engineered nano-bio interfaces and stem cells and to develop optimized regenerative medicine and tissue engineering designs.

18.
Cureus ; 15(1): e33884, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36819444

RESUMO

The aim of this study is to compare the efficacy and safety of low-dose and high-dose dexamethasone in hospitalized coronavirus disease 2019 (COVID-19) patients. The current meta-analysis was conducted in compliance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A comprehensive literature search was carried out using PubMed, the Cochrane Central Register of Controlled Trials (CENTRAL), and Embase. Outcomes assessed in the current meta-analysis included 28-day mortality, intensive care unit (ICU) admission, mechanical ventilation, length of ICU admission (days), and length of hospital stay (days). For safety, we compared hypoglycemia and the incidence of infection between the high-dose dexamethasone group and the low-dose dexamethasone group. A total of four studies fulfilled the inclusion criteria and were included in this meta-analysis. No significant difference was found between the two groups in terms of ICU admission (risk ratio (RR): 0.72, 95% confidence interval (CI): 0.41-1.28, p-value: 0.27), length of stay in ICU in days (mean difference (MD): -0.05, 95%CI: -3.96-3.87, p-value: 0.98, I-square: 94%), length of hospital stay in days (MD: -0.94, 95%CI: -1.94-0.06, p-value: 0.07), need of mechanical ventilation (RR: 0.72, 95%CI: 0.36-1.48, p-value: 0.38), and 28-day mortality (RR: 0.90, 95% CI: 0.50-1.64, p-value: 0.74). The current study showed that higher doses of dexamethasone failed to enhance efficacy compared to low-dose dexamethasone. Thus, based on the findings of this meta-analysis, low-dose dexamethasone can be recommended for these patients.

19.
Cureus ; 15(3): e36225, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37069882

RESUMO

Goldenhar syndrome is a rare congenital disorder that affects the development of the craniofacial region, spine, and ears. It is characterized by a wide range of symptoms that can vary in severity and may include facial asymmetry, microtia or anotia, cleft lip or palate, vertebral anomalies, and eye abnormalities. Although the cause of Goldenhar syndrome is not fully understood, it is thought to be related to disruptions in the early embryonic development of the affected tissues. The diagnosis is typically made based on physical examination and imaging studies, and management may involve a multidisciplinary team of healthcare professionals, including geneticists, audiologists, and plastic surgeons. Treatment options depend on the specific symptoms and may include surgery, hearing aids, and speech therapy. While Goldenhar syndrome can have significant physical and functional implications for affected individuals, early detection and appropriate management can help improve outcomes and quality of life.

20.
Cureus ; 15(9): e45606, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37868449

RESUMO

Epilepsy, a neurological disorder characterized by recurrent seizures, and diabetes, a metabolic disorder characterized by impaired regulation of glucose levels, are two distinct conditions that may appear unrelated at first glance. Nevertheless, recent scholarly investigations have revealed these entities' intricate and ever-evolving interplay. This review initially delves into the intricate interplay between epilepsy and its potential ramifications on glycemic control. Seizures, particularly those accompanied by convulsive manifestations, have the potential to induce acute perturbations in blood glucose levels via diverse mechanisms, encompassing the liberation of stress hormones, the emergence of insulin resistance, and the dysregulation of the autonomic nervous system. Comprehending these intricate mechanisms is paramount in customizing productive strategies for managing diabetes in individuals with epilepsy. On the contrary, it is worth noting that diabetes can substantially impact the trajectory and control of epilepsy. The correlation between hyperglycemia and an elevated susceptibility to seizures, as well as the potential for exacerbating the intensity of epilepsy, has been established. This narrative review offers a concise exposition of the intricate interplay between epilepsy and glycemic control within diabetes management. The objective of exploring reciprocal influences, underlying mechanisms, and common risk factors is to augment the clinical comprehension of this intricate interconnection. In essence, this acquired knowledge possesses the potential to serve as a guiding compass for healthcare professionals, enabling them to craft bespoke therapeutic approaches that enhance the holistic welfare of individuals grappling with the coexistence of epilepsy and diabetes.

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