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1.
Zootaxa ; 5405(3): 381-410, 2024 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-38480380

RESUMO

Recent resolution of prevailing taxonomic ambiguities in the genus Sphaerotheca and new species discoveries from urban/suburban landscapes highlight the need for attention to non-forested habitats for amphibian conservation. In this paper, we review the status of the members of the genus Sphaerotheca and justify the synonymy of Sphaerotheca magadha as a junior synonym of Sphaerotheca swani. The prospects of resurrection of Sphaerotheca swani (herein preliminarily referred to as Sphaerotheca cf. breviceps [swani]) are discussed. In addition, we describe a new species Sphaerotheca varshaabhu sp. nov. from the suburban region of Bengaluru, India. We employ an integrative taxonomic approach to characterize the new species using molecular phylogeny, genetic distance, morphological characters, and geographical isolation as lines of evidence. We also provide a description of vocal repertoire of Sphaerotheca varshaabhu sp. nov. and provide comparative bioacoustics data for four species. This previously undescribed species from the suburban areas of Bengaluru described herein as Sphaerotheca varshaabhu sp. nov. forms a genetically divergent lineage and its genetic distance varied from 3.6% to 12.2% for 16S rRNA with respect to other species of Sphaerotheca. Our phylogenetic analysis for the genus including the new species confirms the synonymy of one recently described species, resulting in 10 valid species in the genus Sphaerotheca. These results emphasize the need for utilizing an integrative taxonomic approach for uncovering hidden diversity of suburban areas. Given these recent discoveries, we advocate for more robust surveys in human dominated areas, so that these amphibians may receive more attention.


Assuntos
Anuros , Ecossistema , Humanos , Animais , Anuros/genética , Filogenia , RNA Ribossômico 16S/genética , Índia
2.
Indian J Pharmacol ; 56(1): 58-60, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38454591

RESUMO

Stevens-Johnson syndrome is a severe adverse drug reaction affecting the skin and mucous membrane. The causes include Sulfonamides, Anticonvulsants, etc. A patient developed ulcerations in the lips and oral cavity with difficulty in swallowing and rashes over the back, abdomen, and genitalia following administration of injection ceftriaxone 1 g intravenous (IV) b.i.d, injection pantoprazole 40 mg IV b.i.d, tablet aceclofenac + paracetamol 325 mg b.i.d, tablet cetirizine 10 mg b.i.d, chlorhexidine mouth wash, and injection metronidazole 500 mg IV t.i.d for the treatment of traumatic facial injury after 4 days of treatment. Injection ceftriaxone and tablet aceclofenac + paracetamol were suspected as the cause of this reaction. The two drugs were stopped. The patient was treated with corticosteroids, other antimicrobials, and oral topical anesthetics. Health-care providers should be careful about the possible adverse drug reactions even to commonly used drugs.


Assuntos
Diclofenaco/análogos & derivados , Traumatismos Faciais , Síndrome de Stevens-Johnson , Humanos , Síndrome de Stevens-Johnson/etiologia , Acetaminofen/uso terapêutico , Ceftriaxona/uso terapêutico , Traumatismos Faciais/complicações , Comprimidos/uso terapêutico
3.
Eur J Neurosci ; 59(8): 2102-2117, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38279611

RESUMO

The zinc finger protein 804A (ZNF804A) and the 5'-nucleotidase cytosolic II (NT5C2) genes are amongst the first schizophrenia susceptibility genes to have been identified in large-scale genome-wide association studies. ZNF804A has been implicated in the regulation of neuronal morphology and is required for activity-dependent changes to dendritic spines. Conversely, NT5C2 has been shown to regulate 5' adenosine monophosphate-activated protein kinase activity and has been implicated in protein synthesis in human neural progenitor cells. Schizophrenia risk genotype is associated with reduced levels of both NT5C2 and ZNF804A in the developing brain, and a yeast two-hybrid screening suggests that their encoded proteins physically interact. However, it remains unknown whether this interaction also occurs in cortical neurons and whether they could jointly regulate neuronal function. Here, we show that ZNF804A and NT5C2 colocalise and interact in HEK293T cells and that their rodent homologues, ZFP804A and NT5C2, colocalise and form a protein complex in cortical neurons. Knockdown of the Zfp804a or Nt5c2 genes resulted in a redistribution of both proteins, suggesting that both proteins influence the subcellular targeting of each other. The identified interaction between ZNF804A/ZFP804A and NT5C2 suggests a shared biological pathway pertinent to schizophrenia susceptibility within a neuronal cell type thought to be central to the neurobiology of the disorder, providing a better understanding of its genetic landscape.


Assuntos
Esquizofrenia , Humanos , Esquizofrenia/genética , Esquizofrenia/metabolismo , 5'-Nucleotidase/genética , 5'-Nucleotidase/metabolismo , Estudo de Associação Genômica Ampla , Células HEK293 , Neurônios/fisiologia , Polimorfismo de Nucleotídeo Único , Predisposição Genética para Doença , Fatores de Transcrição Kruppel-Like/genética , Fatores de Transcrição Kruppel-Like/metabolismo
4.
Eur J Ophthalmol ; 34(2): 471-479, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37671417

RESUMO

PURPOSE: To determine if glaucoma medications are associated with pregnancy and/or postnatal complications. METHODS: Multicenter descriptive survey. Subjects were female patients 18-45 years who were previously pregnant with a diagnosis of glaucoma or ocular hypertension prior to pregnancy. Chart review queried diagnosis, glaucoma severity, and race. Survey questions were asked for each pregnancy and queried pregnancy age, medications used, and pregnancy outcomes/complications. RESULTS: 114 pregnancies of 56 patients (mean 2.0 pregnancies per patient) were included. Three pregnancies with therapeutic abortion were excluded from further analysis. Mean age during pregnancy was 29.1 ± 5.7 years. Of the 111 pregnancies, 20 (18.0%) used no medications and 91 (82.0%) used at least one medication. Medications were topical carbonic anhydrase inhibitors (n = 45), beta-blockers (n = 55), alpha-agonists (n = 56), and prostaglandin analogues (n = 28). Outcomes were: preterm contractions/labour (6.3%), miscarriage (4.5%), stillbirth (4.5%), induction of labour (11.9%), emergency/unplanned caesarean delivery (13.9%), neonatal intensive care unit (NICU) stay (15.8%), congenital anomalies (8.1%), and low birth weight (10.9%). Fisher exact test assessed outcome associations with individual agents, use of any agent, and different number of agents. Alpha-agonist use was associated with NICU stay: 25.5% rate (p = 0.012) in alpha-agonist use. Most of the alpha-agonist use NICU stays occurred in pregnancies with third trimester use. All other associations were not statistically significant. CONCLUSIONS: The data from this survey suggest an overall favourable safety profile for topical glaucoma medications in pregnancy, but further investigation is needed. Caution should be employed regarding third trimester alpha-agonist use owing to association with NICU stay.


Assuntos
Glaucoma , Hipertensão Ocular , Recém-Nascido , Gravidez , Humanos , Feminino , Adulto Jovem , Adulto , Masculino , Resultado da Gravidez , Glaucoma/tratamento farmacológico , Cesárea , Antagonistas Adrenérgicos beta/uso terapêutico
5.
Cornea ; 43(4): 459-465, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-37713662

RESUMO

PURPOSE: The aim of this study was to report the clinical profile and patterns of recurrence after femtosecond laser-assisted anterior lamellar keratoplasty (FALK) in Reis-Bucklers corneal dystrophy. METHODS: This is a case series of 5 eyes of 4 patients with Reis-Bucklers corneal dystrophy. Clinical images of recurrence were correlated with the high-resolution optical coherence tomography. Histopathologic examination of excised corneal samples was performed when possible. RESULTS: The median time to recurrence was 2 (1-5) years after FALK. Of the 5 eyes, 1 eye had primary FALK, whereas 4 eyes had secondary interventions, which included previous phototherapeutic keratectomy (once in 1 eye and twice in 2 eyes), and previous penetrating keratoplasty, followed by phototherapeutic keratectomy (1 eye). Recurrence was noted at the level of the subepithelium. In addition, 1 eye showed interface deposits along with epithelial downgrowth at the graft-host bed. CONCLUSIONS: The 2 distinct patterns of recurrence noted were at the subepithelial region and the interface. The clinical patterns of recurrence favor an epithelial origin of recurrent deposits.


Assuntos
Distrofias Hereditárias da Córnea , Transplante de Córnea , Humanos , Tomografia de Coerência Óptica , Distrofias Hereditárias da Córnea/diagnóstico , Ceratoplastia Penetrante , Recidiva , Lasers , Transplante de Córnea/métodos
6.
Cureus ; 15(11): e48342, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-38060721

RESUMO

Avascular necrosis (AVN) of the femoral head is a chronic condition that primarily affects patients under the age of 40. While the precise etiology of AVN remains unknown, the condition is defined by a vascular insult to the femoral head's blood supply, which can cause the femoral head to collapse and then undergo degenerative alterations. As the condition worsens, the articular surface may collapse depending on how much of the femoral head is affected. When the femoral head collapses in these people, significant pain follows, and the condition seldom regresses. The patient came to Acharya Vinoba Bhave Hospital Outpatient Department of Orthopedics with a complaint of bilateral hip pain (right > left). The patient had a history of COVID-19, for which the patient took steroids of high dosage, and later he had a complaint of bilateral hip pain that was gradual and progressive, which affected the daily living activities of the patient for which the patient was operated for the bilateral hips. Postoperatively, the patient has been given a physiotherapy call, which included isometric exercises, stretching and strengthening exercises, which have shown recovery in the patient.

8.
Invest Ophthalmol Vis Sci ; 64(14): 9, 2023 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-37934158

RESUMO

Purpose: The purpose of this study was to identify the genetic cause of aggressive corneal vascularization in otherwise healthy children in one family. Further, to study molecular consequences associated with the identified variant and implications for possible treatment. Methods: Exome sequencing was performed in affected individuals. HeLa cells were transduced with the identified c.1643C>A, p.(Ser548Tyr) variant in the platelet-derived growth factor receptor beta gene (PDGFRB) or wild-type PDGFRB. ELISA and immunoblot analysis were used to detect the phosphorylation levels of PDGFRß and downstream signaling proteins in untreated and ligand-stimulated cells. Sensitivity to various receptor tyrosine kinase inhibitors (TKIs) was determined. Results: A novel c.1643C>A, p.(Ser548Tyr) PDGFRB variant was found in affected family members. HeLa cells transduced with this variant did not have increased baseline levels of phosphorylated PDGFRß. However, upon stimulation with ligand, excessive activation of PDGFRß was observed compared to cells transduced with the wild-type variant. PDGFRß with the p.(Ser548Tyr) amino acid substitution was successfully inhibited with tyrosine kinase inhibitors (axitinib, dasatinib, imatinib, and sunitinib) in vitro. Conclusions: A novel c.1643C>A, p.(Ser548Tyr) PDGFRB variant was found in family members with isolated corneal vascularization. Cells transduced with the newly identified variant showed increased phosphorylation of PDGFRß upon ligand stimulation. This suggests that PDGF-PDGFRß signaling in these patients leads to overactivation of PDGFRß, which could lead to abnormal wound healing of the cornea. The examined TKIs prevented such overactivation, introducing the possibility for targeted treatment in these patients.


Assuntos
Neovascularização da Córnea , Receptor beta de Fator de Crescimento Derivado de Plaquetas , Humanos , Córnea , Células HeLa , Ligantes
9.
Small ; : e2306353, 2023 Nov 23.
Artigo em Inglês | MEDLINE | ID: mdl-37997226

RESUMO

Metal-organic frameworks (MOFs) represent a relatively new family of materials that attract lots of attention thanks to their unique features such as hierarchical porosity, active metal centers, versatility of linkers/metal nodes, and large surface area. Among the extended list of MOFs, Zr-based-MOFs demonstrate comparably superior chemical and thermal stabilities, making them ideal candidates for energy and environmental applications. As a Zr-MOF, NU-1000 is first synthesized at Northwestern University. A comprehensive review of various approaches to the synthesis of NU-1000 MOFs for obtaining unique surface properties (e.g., diverse surface morphologies, large surface area, and particular pore size distribution) and their applications in the catalysis (electro-, and photo-catalysis), CO2 reduction, batteries, hydrogen storage, gas storage/separation, and other environmental fields are presented. The review further outlines the current challenges in the development of NU-1000 MOFs and their derivatives in practical applications, revealing areas for future investigation.

10.
Ophthalmic Genet ; : 1-6, 2023 Nov 24.
Artigo em Inglês | MEDLINE | ID: mdl-37997707

RESUMO

BACKGROUND: Fanconi's syndrome (FS) is characterized by type-2 renal tubular acidosis, short stature, and renal rickets, along with glycosuria, aminoaciduria, hypophosphaturia, and urinary bicarbonate wasting. The genetic form of FS has been linked to HNF4A variants. Although additional clinical features such as hearing impairment have recently been associated with HNF4A-linked FS, its ocular manifestation has not been described. MATERIAL AND METHODS: Presenting a case of a 5-year-old male child with bilateral progressive corneal opacification and the presence of bilateral greyish-white deposits in the interpalpebral region since infancy. A next-generation sequencing (NGS)-based genetic testing was performed for the child followed by parental genetic testing for the identified variant. Furthermore, relevant works of literature were reviewed related to this condition. RESULTS: Detailed corneal findings showed a bilateral band-shaped keratopathy (BSK) in the patient. Physical and systemic findings showed signs consistent with FS. Sequencing analysis revealed a novel heterozygous c.635C>T, (p.Pro212Leu) variant in the HNF4A gene in the proband and mother, while the father had a normal genotype. CONCLUSIONS: Our case highlights the occurrence of BSK in an exceptionally rare manifestation of hereditary FS linked to HNF4A gene variant. The variant exists both in proband and asymptomatic mother. Therefore, the variable penetrance which is known to exist in HNF4A is acknowledged in this context. This report suggests the first documented instance establishing a plausible connection between BSK and HNF4A-associated FS, characterized by the variable penetrance attributed to the HNF4A gene.

11.
Indian J Ophthalmol ; 71(8): 2953-2958, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37530263

RESUMO

Purpose: To describe a professionalism survey tool and its use to assess knowledge of medical professionalism in ophthalmology training programs in Central India. Settings and Design: Multi-center survey study. Methods: A validated 33-question, scenario-based survey addressing professionalism attributes was administered at five centers in central India. The attributes tested included "personal characteristics," "physician-patient relationships," "workplace practice and relationships," and "socially responsible behaviors." A mean attribute score (%) was calculated and compared to "gold standard" responses by a group of expert senior ophthalmologists (100% agreement for responses). Results: A total of 225 participants completed the survey; 124 residents, 47 fellows, and 54 consultants (98.4% response rate). The total mean attribute score was 80.7 ± 9.1 (min 16.67, max 100). There was variation in the mean attribute score by professionalism attribute (P < 0.001), and a trend toward higher mean attribute scores for consultants compared to trainees across all attribute groups. The scores for "personal characteristics" (93 ± 9.7) and "physician-patient relationship" (82 ± 15.8) were the highest, whereas scores for "socially responsible behaviors" (73.9 ± 18.6) and "workplace practices" were low (72 ± 13). Conclusions: There is a generally high level of professionalism knowledge among ophthalmologists in central India. The results suggest that experience does impact knowledge of professionalism. Potential for improvement in professionalism exists in around "workplace practices", and around "socially responsible behaviors". These findings may serve as a valuable discussion starter and teaching tool to enhance professionalism in ophthalmology training programs.


Assuntos
Internato e Residência , Oftalmologia , Humanos , Profissionalismo , Oftalmologia/educação , Inquéritos e Questionários , Relações Médico-Paciente , Índia
13.
Front Mol Neurosci ; 16: 1191323, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37441676

RESUMO

Multiple molecular pathways and cellular processes have been implicated in the neurobiology of autism and other neurodevelopmental conditions. There is a current focus on synaptic gene conditions, or synaptopathies, which refer to clinical conditions associated with rare genetic variants disrupting genes involved in synaptic biology. Synaptopathies are commonly associated with autism and developmental delay and may be associated with a range of other neuropsychiatric outcomes. Altered synaptic biology is suggested by both preclinical and clinical studies in autism based on evidence of differences in early brain structural development and altered glutamatergic and GABAergic neurotransmission potentially perturbing excitatory and inhibitory balance. This review focusses on the NRXN-NLGN-SHANK pathway, which is implicated in the synaptic assembly, trans-synaptic signalling, and synaptic functioning. We provide an overview of the insights from preclinical molecular studies of the pathway. Concentrating on NRXN1 deletion and SHANK3 mutations, we discuss emerging understanding of cellular processes and electrophysiology from induced pluripotent stem cells (iPSC) models derived from individuals with synaptopathies, neuroimaging and behavioural findings in animal models of Nrxn1 and Shank3 synaptic gene conditions, and key findings regarding autism features, brain and behavioural phenotypes from human clinical studies of synaptopathies. The identification of molecular-based biomarkers from preclinical models aims to advance the development of targeted therapeutic treatments. However, it remains challenging to translate preclinical animal models and iPSC studies to interpret human brain development and autism features. We discuss the existing challenges in preclinical and clinical synaptopathy research, and potential solutions to align methodologies across preclinical and clinical research. Bridging the translational gap between preclinical and clinical studies will be necessary to understand biological mechanisms, to identify targeted therapies, and ultimately to progress towards personalised approaches for complex neurodevelopmental conditions such as autism.

14.
Proc Natl Acad Sci U S A ; 120(31): e2300191120, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37490537

RESUMO

Social memory is essential to the functioning of a social animal within a group. Estrogens can affect social memory too quickly for classical genomic mechanisms. Previously, 17ß-estradiol (E2) rapidly facilitated short-term social memory and increased nascent synapse formation, these synapses being potentiated following neuronal activity. However, what mechanisms underlie and coordinate the rapid facilitation of social memory and synaptogenesis are unclear. Here, the necessity of extracellular signal-regulated kinase (ERK) and phosphoinositide 3-kinase (PI3K) signaling for rapid facilitation of short-term social memory and synaptogenesis was tested. Mice performed a short-term social memory task or were used as task-naïve controls. ERK and PI3K pathway inhibitors were infused intradorsal hippocampally 5 min before E2 infusion. Forty minutes following intrahippocampal E2 or vehicle administration, tissues were collected for quantification of glutamatergic synapse number in the CA1. Dorsal hippocampal E2 rapid facilitation of short-term social memory depended upon ERK and PI3K pathways. E2 increased glutamatergic synapse number (bassoon puncta positive for GluA1) in task-performing mice but decreased synapse number in task-naïve mice. Critically, ERK signaling was required for synapse formation/elimination in task-performing and task-naïve mice, whereas PI3K inhibition blocked synapse formation only in task-performing mice. While ERK and PI3K are both required for E2 facilitation of short-term social memory and synapse formation, only ERK is required for synapse elimination. This demonstrates previously unknown, bidirectional, rapid actions of E2 on brain and behavior and underscores the importance of estrogen signaling in the brain to social behavior.


Assuntos
MAP Quinases Reguladas por Sinal Extracelular , Fosfatidilinositol 3-Quinases , Camundongos , Feminino , Animais , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Estradiol/farmacologia , Estradiol/metabolismo , Estrogênios/farmacologia , Estrogênios/metabolismo , Hipocampo/metabolismo , Sinapses/metabolismo
15.
Ophthalmic Plast Reconstr Surg ; 39(6): 588-593, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37279012

RESUMO

PURPOSE: The purpose of this study was to compare the histopathologic inflammation and fibrosis of orbital adipose tissue in orbital inflammatory disease (OID) specimens. METHODS: In this retrospective cohort study, inflammation, and fibrosis in orbital adipose tissue from patients with thyroid-associated orbitopathy (TAO), granulomatosis with polyangiitis (GPA), sarcoidosis, nonspecific orbital inflammation (NSOI), and healthy controls were scored by 2 masked ocular pathologists. Both categories were scored on a scale of 0 to 3 with scoring criteria based on the percentage of specimens containing inflammation or fibrosis, respectively. Tissue specimens were collected from oculoplastic surgeons at 8 international centers representing 4 countries. Seventy-four specimens were included: 25 with TAO, 6 with orbital GPA, 7 with orbital sarcoidosis, 24 with NSOI, and 12 healthy controls. RESULTS: The mean inflammation and fibrosis scores for healthy controls were 0.0 and 1.1, respectively. Orbital inflammatory disease groups' inflammation (I) and fibrosis (F) scores, formatted [I, F] with respective p -values when compared to controls, were: TAO [0.2, 1.4] ( p = 1, 1), GPA [1.9, 2.6] ( p = 0.003, 0.009), sarcoidosis [2.4, 1.9] ( p = 0.001, 0.023), and NSOI [1.3, 1.8] ( p ≤ 0.001, 0.018). Sarcoidosis had the highest mean inflammation score. The pairwise analysis demonstrated that sarcoidosis had a significantly higher mean inflammation score than NSOI ( p = 0.036) and TAO ( p < 0.0001), but no difference when compared to GPA. GPA had the highest mean fibrosis score, with pairwise analysis demonstrating a significantly higher mean fibrosis score than TAO ( p = 0.048). CONCLUSIONS: Mean inflammation and fibrosis scores in TAO orbital adipose tissue samples did not differ from healthy controls. In contrast, the more "intense" inflammatory diseases such as GPA, sarcoidosis, and NSOI did demonstrate higher histopathologic inflammation and fibrosis. This has implications in prognosis, therapeutic selection, and response monitoring in orbital inflammatory disease.


Assuntos
Oftalmopatia de Graves , Sarcoidose , Humanos , Órbita/diagnóstico por imagem , Órbita/patologia , Estudos Retrospectivos , Inflamação/patologia , Oftalmopatia de Graves/patologia , Fibrose
17.
Small ; 19(43): e2300673, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37376842

RESUMO

Urea oxidation reaction (UOR) is one of the promising alternative anodic reactions to water oxidation that has attracted extensive attention in green hydrogen production. The application of specifically designed electrocatalysts capable of declining energy consumption and environmental consequences is one of the major challenges in this field. Therefore, the goal is to achieve a resistant, low-cost, and environmentally friendly electrocatalyst. Herein, a water-stable fluorinated Cu(II) metalorganic framework (MOF) {[Cu2 (L)(H2 O)2 ]·(5DMF)(4H2 O)}n (Cu-FMOF-NH2 ; H4 L = 3,5-bis(2,4-dicarboxylic acid)-4-(trifluoromethyl)aniline) is developed utilizing an angular tetracarboxylic acid ligand that incorporates both trifluoromethyl (-CF3 ) and amine (-NH2 ) groups. The tailored structure of Cu-FMOF-NH2 where linkers are connected by fluoride bridges and surrounded by dicopper nodes reveals a 4,24T1 topology. When employed as electrocatalyst, Cu-FMOF-NH2 requires only 1.31 V versus reversible hydrogen electrode (RHE) to deliver 10 mA cm-2 current density in 1.0 m KOH with 0.33 m urea electrolyte and delivered an even higher current density (50 mA cm-2 ) at 1.47 V versus RHE. This performance is superior to several reported catalysts including commercial RuO2 catalyst with overpotential of 1.52 V versus RHE. This investigation opens new opportunities to develop and utilize pristine MOFs as a potential electrocatalyst for various catalytic reactions.

18.
JCO Precis Oncol ; 7: e2200572, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37343200

RESUMO

PURPOSE: GI cancers commonly spread to the peritoneal cavity, particularly from primary adenocarcinomas of the stomach and appendix. Peritoneal metastases are difficult to visualize on cross-sectional imaging and cause substantial morbidity and mortality. The purpose of this study was to determine whether serial highly sensitive tumor-informed circulating tumor DNA (ctDNA) measurements could longitudinally track changes in disease burden and inform clinical care. METHODS: This was a retrospective case series of patients with gastric or appendiceal adenocarcinoma and isolated peritoneal disease that was radiographically occult. Patients underwent quantitative tumor-informed ctDNA testing (Signatera) as part of routine clinical care. No interventions were prespecified based on ctDNA results. RESULTS: Of 13 patients studied, the median age was 65 (range, 45-75) years, with 7 (54%) women, 5 (38%) patients with gastric, and 8 (62%) patients with appendiceal adenocarcinoma. Eight (62%) patients had detectable ctDNA at baseline measurement, with median value 0.13 MTM/mL (range, 0.06-11.68), and assay was technically unsuccessful in two cases with appendiceal cancer because of limited tumor tissue. Five (100%) patients with gastric cancer and 3 (50%) patients with appendiceal cancer had detectable ctDNA at baseline. Although baseline levels of ctDNA were low, longitudinal assessment tracked with changes in disease burden among patients undergoing chemotherapy for metastatic disease. In two patients undergoing surveillance after definitive surgical management of gastric adenocarcinoma, detection of ctDNA prompted diagnosis of isolated peritoneal disease. CONCLUSION: Quantitative tumor-informed serial ctDNA testing aids clinical management of patients with isolated peritoneal disease. Low levels of baseline ctDNA suggest a role for highly sensitive ctDNA approaches over panel-based testing. Further exploration of this approach should be considered in patients with isolated peritoneal malignant disease.


Assuntos
Adenocarcinoma , Neoplasias do Apêndice , DNA Tumoral Circulante , Neoplasias Peritoneais , Neoplasias Gástricas , Humanos , Feminino , Idoso , Masculino , DNA Tumoral Circulante/genética , Neoplasias Peritoneais/diagnóstico , Neoplasias Peritoneais/genética , Estudos Retrospectivos , Biomarcadores Tumorais/genética , DNA de Neoplasias/genética
19.
Small ; 19(37): e2301153, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37154199

RESUMO

Ultra-high energy density battery-type materials are promising candidates for supercapacitors (SCs); however, slow ion kinetics and significant volume expansion remain major barriers to their practical applications. To address these issues, hierarchical lattice distorted α-/γ-MnS@Cox Sy core-shell heterostructure constrained in the sulphur (S), nitrogen (N) co-doped carbon (C) metal-organic frameworks (MOFs) derived nanosheets (α-/γ-MnS@Cox Sy @N, SC) have been developed. The coordination bonding among Cox Sy , and α-/γ-MnS nanoparticles at the interfaces and the π-π stacking interactions developed across α-/γ-MnS@Cox Sy and N, SC restrict volume expansion during cycling. Furthermore, the porous lattice distorted heteroatom-enriched nanosheets contain a sufficient number of active sites to allow for efficient electron transportation. Density functional theory (DFT) confirms the significant change in electronic states caused by heteroatom doping and the formation of core-shell structures, which provide more accessible species with excellent interlayer and interparticle conductivity, resulting in increased electrical conductivity. . The α-/γ-MnS@Cox Sy @N, SC electrode exhibits an excellent specific capacity of 277 mA hg-1 and cycling stability over 23 600 cycles. A quasi-solid-state flexible extrinsic pseudocapacitor (QFEPs) assembled using layer-by-layer deposited multi-walled carbon nanotube/Ti3 C2 TX nanocomposite negative electrode. QFEPs deliver specific energy of 64.8 Wh kg-1 (1.62 mWh cm-3 ) at a power of 933 W kg-1 and 92% capacitance retention over 5000 cycles.

20.
Indian J Radiol Imaging ; 33(2): 201-217, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37123565

RESUMO

The clivus is a midline anatomical structure in the central skull base. It is affected by a wide range of non-neoplastic, benign and malignant pathologies, some of which typically affect the clivus because of its strategic location and embryological origins. Clival lesions may often be asymptomatic with occasional complaints like headache or cranial neuropathy in few. Cross-sectional imaging techniques, namely, computed tomographic scan and magnetic resonance imaging, thus, play a key role in approximating to the final diagnosis and estimating the disease extent. In this article, we highlight the important imaging features of various clival and paraclival pathologies to facilitate effective diagnosis, therapeutic planning, and management.

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