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1.
Planta ; 259(6): 152, 2024 May 12.
Artigo em Inglês | MEDLINE | ID: mdl-38735012

RESUMO

MAIN CONCLUSION: Overexpression of Artemisia annua jasmonic acid carboxyl methyltransferase (AaJMT) leads to enhanced artemisinin content in Artemisia annua. Artemisinin-based combination therapies remain the sole deterrent against deadly disease malaria and Artemisia annua remains the only natural producer of artemisinin. In this study, the 1101 bp gene S-adenosyl-L-methionine (SAM): Artemisia annua jasmonic acid carboxyl methyltransferase (AaJMT), was characterised from A. annua, which converts jasmonic acid (JA) to methyl jasmonate (MeJA). From phylogenetic analysis, we confirmed that AaJMT shares a common ancestor with Arabidopsis thaliana, Eutrema japonica and has a close homology with JMT of Camellia sinensis. Further, the Clustal Omega depicted that the conserved motif I, motif III and motif SSSS (serine) required to bind SAM and JA, respectively, are present in AaJMT. The relative expression of AaJMT was induced by wounding, MeJA and salicylic acid (SA) treatments. Additionally, we found that the recombinant AaJMT protein catalyses the synthesis of MeJA from JA with a Km value of 37.16 µM. Moreover, site-directed mutagenesis of serine-151 in motif SSSS to tyrosine, asparagine-10 to threonine and glutamine-25 to histidine abolished the enzyme activity of AaJMT, thus indicating their determining role in JA substrate binding. The GC-MS analysis validated that mutant proteins of AaJMT were unable to convert JA into MeJA. Finally, the artemisinin biosynthetic and trichome developmental genes were upregulated in AaJMT overexpression transgenic lines, which in turn increased the artemisinin content.


Assuntos
Acetatos , Artemisia annua , Artemisininas , Ciclopentanos , Metiltransferases , Oxilipinas , Filogenia , Artemisia annua/genética , Artemisia annua/enzimologia , Artemisia annua/metabolismo , Ciclopentanos/metabolismo , Ciclopentanos/farmacologia , Artemisininas/metabolismo , Oxilipinas/metabolismo , Oxilipinas/farmacologia , Metiltransferases/metabolismo , Metiltransferases/genética , Acetatos/farmacologia , Acetatos/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Plantas Geneticamente Modificadas , Regulação da Expressão Gênica de Plantas , Ácido Salicílico/metabolismo
2.
Exp Clin Transplant ; 22(4): 307-310, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38742322

RESUMO

Posttransplant lymphoproliferative disorder is a life-threatening complication after solid-organ transplants. In adults, recipients of heart transplants have the highest risk, whereas renal transplant recipients have the lowest risk among all solid-organ transplants. The most common site for posttransplant lymphoproliferative disorders are gastrointestinal tract followed by the graft itself. Airway involvement in posttransplant lymphoproliferative disorder is rarely encountered. We report a case of a 26-year-old renal allograft recipient who presented to the emergency room with airway obstruction necessitating an emergency tracheostomy. Imaging revealed a left tonsillar mass extending into the nasopharynx and retropharyngeal space causing complete oropharyngeal occlusion. Endoscopic biopsy from nasopharyngeal mass showed a diffuse large B-cell lymphoma and was Ebstein-Barr virus positive. Reduction in immunosuppression and treatment with posttransplant lymphoproliferative disorder-1 risk-stratified approach resulted in complete remission.


Assuntos
Obstrução das Vias Respiratórias , Imunossupressores , Transplante de Rim , Linfoma Difuso de Grandes Células B , Humanos , Transplante de Rim/efeitos adversos , Adulto , Resultado do Tratamento , Obstrução das Vias Respiratórias/etiologia , Obstrução das Vias Respiratórias/virologia , Obstrução das Vias Respiratórias/diagnóstico , Imunossupressores/efeitos adversos , Masculino , Linfoma Difuso de Grandes Células B/virologia , Doença Aguda , Biópsia , Infecções por Vírus Epstein-Barr/diagnóstico , Infecções por Vírus Epstein-Barr/virologia , Infecções por Vírus Epstein-Barr/complicações , Infecções por Vírus Epstein-Barr/imunologia , Traqueostomia/efeitos adversos , Indução de Remissão , Hospedeiro Imunocomprometido , Neoplasias Nasofaríngeas/virologia , Neoplasias Nasofaríngeas/cirurgia , Neoplasias Nasofaríngeas/diagnóstico
3.
Cureus ; 16(4): e58600, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38651089

RESUMO

Echinococcus granulosus causes hydatid cysts, a significant zoonotic and pulmonary parasitic disease that can mimic various pathologies and is often harder to manage than the disease itself. A hydatid cyst is considered a significant health problem in India, Iran, China, and Mediterranean countries, which lack satisfactory environmental health, preventive medicine, and veterinarian services. Echinococcosis continues to be a major community health burden in several countries, and in some terrains, it constitutes an emerging and re-emerging disease. Cystic echinococcosis is the most common human disease of this genus, and it accounts for a significant number of cases worldwide. Herein, a case involving an 11-year-old presenting with fever, dry cough, and right hypochondrial pain is presented, where imaging revealed a hydatid cyst in the lung. Surgical removal of the cyst was achieved through right posterolateral thoracotomy under one-lung ventilation and anesthesia using intubation with a double-lumen endotracheal tube (DLET or DLT), highlighting surgery as the primary treatment despite the lack of consensus on surgical methods. This case underscores the effectiveness of individualized, parenchyma-preserving surgery for even large, uncomplicated cysts, indicating a positive prognosis.

4.
Environ Res ; 252(Pt 2): 118903, 2024 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-38609070

RESUMO

Heavy carbon industries produce solid side stream materials that contain inorganic chemicals like Ca, Na, or Mg, and other metals such as Fe or Al. These inorganic compounds usually react efficiently with CO2 to form stable carbonates. Therefore, using these side streams instead of virgin chemicals to capture CO2 is an appealing approach to reduce CO2 emissions. Herein, we performed an experimental study of the mineral carbonation potential of three industrial steel slags via aqueous, direct carbonation. To this end, we studied the absorption capacities, reaction yields, and physicochemical characteristics of the carbonated samples. The absorption capacities and the reaction yields were analyzed through experiments carried out in a reactor specifically designed to work without external stirring. As for the physicochemical characterization, we used solid-state Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscope (SEM). Using this reactor, the absorption capacities were between 5.8 and 35.3 g/L and reaction yields were in the range of 81-211 kg CO2/ton of slag. The physicochemical characterization of the solid products with solid FTIR, XRD and SEM indicated the presence of CaCO3. This suggests that there is potential to use the carbonated products in commercial applications.

5.
Biomater Adv ; 161: 213868, 2024 Apr 20.
Artigo em Inglês | MEDLINE | ID: mdl-38677038

RESUMO

Triple negative breast carcinoma (TNBC) accounts for 15-20 % of all incident breast cancers (BC) and is known to be highly invasive, has fewer treatment options, and tends to have a worse prognosis. However, due to its biological heterogeneity and diverse clinical and epidemiological behaviors, TNBC lacks a tumor-specific targeted therapy. In the present work we have developed a TNBC-specific targeted nano-delivery agent comprising of a cRGD labeled magneto-liposome (T-LMD) co-encapsulated with oleic acid coated iron oxide nanoparticles (MN-OA) and doxorubicin (Dox) in the liposome bilayer and core, respectively. T-LMD was found to show enhanced uptake and induction of ferroptotic cell death in MDA-MB-231, a TNBC model cell line. Additionally, T-LMD induced ferroptosis was found to be accompanied by release of HMGB1, an immunogenic cell death marker, suggesting its immunogenicity for augmenting the activation of anti-tumor immunity in TNBC. The strategic placement of IONPs in the liposome bilayer of T-LMD facilitates the sensitization of MDA-MB-231 cells to undergo ferroptosis; predominantly via the activation of the iron/lipid metabolism pathway, as validated by use of small molecule ferroptosis inhibitor (ferrostatin-1) and iron chelator (deferoxamine). Activation of ferroptotic cell death was also corroborated by ferroptosis specific-ultrastructural alterations in the shape/size of cellular mitochondria and cell ballooning as observed by transmission electron microscopy and bright field imaging, respectively. Thus, our ferroptosis nano-inducer (T-LMD) can efficiently kill TNBC cells via enhanced LPO and ROS generation leading to membrane damage and consequent release of LDH and HMGB1, induce mitochondrial alterations and enhanced DNA double strand breaks. Altogether, our results suggest significant implications of T-LMD for treatment of TNBC.

6.
Future Med Chem ; 2024 Apr 04.
Artigo em Inglês | MEDLINE | ID: mdl-38573017

RESUMO

Background: Exploration of the multi-target approach considering both human carbonic anhydrase (hCA) IX and XII and cathepsin B is a promising strategy to target cancer. Methodology & Results: 22 novel 1,2,4-triazole derivatives were synthesized and evaluated for their inhibition efficacy against hCA I, II, IX, XII isoforms and cathepsin B. The compounds demonstrated effective inhibition against hCA IX and/or XII isoforms with considerable selectivity over off-target hCA I/II. All compounds presented significant anticathepsin B activities at a low concentration of 10-7 M and in vitro results were also supported by the molecular modeling studies. Conclusion: Insights of present study can be utilized in the rational design of effective and selective hCA IX and XII inhibitors capable of inhibiting cathepsin B.

7.
Nanoscale ; 2024 Apr 29.
Artigo em Inglês | MEDLINE | ID: mdl-38682669

RESUMO

Hydrogen (H2) is widely used in industrial processes and is one of the well-known choices for storage of renewable energy. H2 detection has become crucial for safety in manufacturing, storage, and transportation due to its strong explosivity. To overcome the issue of explosion, there is a need for highly selective and sensitive H2 sensors that can function at low temperatures. In this research, we have adequately fabricated an unreported van der Waals (vdWs) PdSe2/WS2 heterostructure, which exhibits exceptional properties as a H2 sensor. The formation of these heterostructure devices involves the direct selenization process using chemical vapor deposition (CVD) of Pd films that have been deposited on the substrate of SiO2/Si by DC sputtering, followed by drop casting of WS2 nanoparticles prepared by a hydrothermal method onto device substrates including pre-patterned electrodes. The confirmation of the heterostructure has been done through the utilization of powder X-ray diffraction (XRD), depth-dependent X-ray photoelectron spectroscopy (XPS) and field-emission scanning electron microscopy (FE-SEM) techniques. Also, the average roughness of thin films is decided by Atomic Force Microscopy (AFM). The comprehensive research shows that the PdSe2/WS2 heterostructure-based sensor produces a response that is equivalent to 67.4% towards 50 ppm H2 at 100 °C. The response could be a result of the heterostructure effect and the superior selectivity for H2 gas in contrast to other gases, including NO2, CH4, CO and CO2, suggesting tremendous potential for H2 detection. Significantly, the sensor exhibits fast response and a recovery time of 31.5 s and 136.6 s, respectively. Moreover, the explanation of the improvement in gas sensitivity was suggested by exploiting the energy band positioning of the PdSe2/WS2 heterostructure, along with a detailed study of variations in the surface potential. This study has the potential to provide a road map for the advancement of gas sensors utilizing two-dimensional (2D) vdWs heterostructures, which exhibit superior performance at low temperatures.

8.
J Pharm Bioallied Sci ; 16(Suppl 1): S786-S788, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38595407

RESUMO

Background: Oral cancer is a significant global health issue, with prevention and early detection being pivotal for improved outcomes. This study investigates the impact of cultural and socioeconomic factors on oral cancer prevention behaviors, screening participation, and treatment outcomes. Materials and Methods: A cross-sectional study design was employed, involving a sample size of 1,000 participants. Participants were recruited through stratified sampling to ensure cultural and socioeconomic diversity. Statistical analyses, including logistic regression, were used to explore associations between factors and outcomes. Results: The study revealed multifaceted influences of cultural and socioeconomic factors on oral cancer-related aspects. Cultural factors significantly influenced prevention behaviors, with participants from certain cultural backgrounds exhibiting higher rates of tobacco use and lower rates of dietary adherence). Socioeconomic status played a role in screening uptake, with individuals from lower income brackets less likely to undergo regular screenings. Conclusion: Cultural and socioeconomic factors have a substantial influence on oral cancer prevention behaviors, screening participation, and treatment outcomes.

9.
J Pharm Bioallied Sci ; 16(Suppl 1): S783-S785, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38595410

RESUMO

Background: Oral cancer is a significant global health concern with substantial morbidity and mortality rates. Early detection during routine dental check-ups is crucial for improved patient outcomes. Dental professionals play a pivotal role in conducting oral cancer screenings, but the frequency and methods they employ remain understudied. Aim: This cross-sectional study aimed to investigate the frequency of oral cancer screenings during routine dental check-ups conducted by dental professionals and the methods they commonly use. Materials and Methods: A survey was administered to 500 dental professionals, including dentists and dental hygienists, representing diverse demographics and practice settings. The survey collected data on the frequency of oral cancer screenings and the primary methods employed. Descriptive statistics and Chi-square tests were used for data analysis. Results: The study found that 85% of dental professionals conduct oral cancer screenings during routine dental check-ups, with 48% performing them annually and 33% at every visit. Visual inspection (97%) and palpation (83%) were the most commonly used methods, while adjunctive screening tools (45%) were less frequently incorporated. Conclusion: Dental professionals are actively engaged in oral cancer screenings during routine dental check-ups, demonstrating a commitment to early detection. Visual inspection and palpation are commonly employed methods, but there is room for improvement in the adoption of adjunctive screening tools.

10.
AAPS PharmSciTech ; 25(3): 55, 2024 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-38448649

RESUMO

Prostate cancer remains a significant global health concern, requiring innovative approaches for improved therapeutic outcomes. In recent years, nanoparticle-based drug delivery systems have emerged as promising strategies to address the limitations of conventional cancer chemotherapy. The key trends include utilizing nanoparticles for enhancing drug delivery to prostate cancer cells. Nanoparticles have some advantages such as improved drug solubility, prolonged circulation time, and targeted delivery of drugs. Encapsulation of chemotherapeutic agents within nanoparticles allows for controlled release kinetics, reducing systemic toxicity while maintaining therapeutic efficacy. Additionally, site-specific accumulation within the prostate tumor microenvironment is made possible by the functionalization of nanocarrier with targeted ligands, improving therapeutic effectiveness. This article highlights the basics of prostate cancer, statistics of prostate cancer, mechanism of multidrug resistance, targeting approach, and different types of nanocarrier used for the treatment of prostate cancer. It also includes the applications of nanocarriers for the treatment of prostate cancer and clinical trial studies to validate the safety and efficacy of the innovative drug delivery systems. The article focused on developing nanocarrier-based drug delivery systems, with the goal of translating these advancements into clinical applications in the future.


Assuntos
Nanopartículas , Neoplasias da Próstata , Masculino , Humanos , Neoplasias da Próstata/tratamento farmacológico , Sistemas de Liberação de Medicamentos , Cinética , Solubilidade , Microambiente Tumoral
11.
Indian J Otolaryngol Head Neck Surg ; 76(1): 781-787, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38440579

RESUMO

Purpose: The round window approach has become the most preferred route for electrode insertion in cochlear implant surgery; however, it is not possible at times due to difficult round window membrane (RWM) visibility. Our study aims to investigate the relationship between preoperative radiological parameters and the surgical visibility of the RWM in Cochlear implant patients. Methodology: A prospective cross-sectional study of 31 patients, age < 6 years, with bilateral severe to profound sensorineural hearing loss was conducted at a tertiary care hospital. The preoperative HRCT temporal bone scan was studied, and the parameters evaluated were facial nerve location, facial recess width, and RWM visibility prediction. All patients were operated on via the posterior tympanotomy. The surgical RWM visibility was done after optimal drilling of the posterior tympanotomy recess. The relationship between the radiological parameters and surgical visibility of RWM was evaluated. Results: The difference in the facial nerve location as per the type of RWM was found to be significant (p value < 0.05). However, the facial recess width was not significantly associated with RWM visibility. The radiological prediction of RWM visibility by tracing the prediction line over RWM was significantly associated with intraoperative RWM visibility. Conclusion: The goal to look for preoperative scans is to predict the ease or difficulty of RWM visibility during surgery. The difficult visualization of the RWM, can result in dire intraoperative consequences. A comprehensive understanding of preoperative radiological parameters, coupled with meticulous surgical planning, is crucial to address these challenges effectively by focusing on enhancing RWM visualization.

12.
Turk J Obstet Gynecol ; 21(1): 43-50, 2024 Mar 04.
Artigo em Inglês | MEDLINE | ID: mdl-38440967

RESUMO

Objective: MCAM-1 (CD146) is an endothelial cell adhesion molecule belonging to the immunoglobulin superfamily. Recent studies have identified CD146 expression as a critical marker for tumor progression, migration, and metastasis in various malignancies. This study aimed to evaluate CD146 immunohistochemical expression in various gynecological cancers. Materials and Methods: This study was conducted in a tertiary medical center in central India. A total of 49 gynecological cancer cases and 16 site-matched controls were included. The cases comprised 27 cervical, 10 endometrial, 10 ovarian, and two miscellaneous cancers. CD146 immunohistochemistry was performed and assessed for immunoreactivity score (IRS), microvascular density (MVD), and microvascular caliber (MVC). An IRS of 5 or more was considered CD146 positive. Results: The p-values for CD146 positivity for cases vs. control were 0.0531, 0.0580, and 0.007 for cervical, endometrial, and ovarian sites, respectively. The mean MVD was found to be significantly higher in cases compared with benign tissues (p-value <0.00001), and the mean MVC of cases was found to be smaller when compared with the controls (p-value <0.0001). Conclusion: MVD by CD146 was found to be higher in gynecological malignancies, highlighting its role in cancer neo-angiogenesis and its potential therapeutic role. CD146 epithelial expression was also significantly higher in ovarian cancers. Further studies with a larger sample size are required to confirm that this protein may be a potential theognostic target in gynecological cancers.

13.
Cureus ; 16(2): e53828, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38465118

RESUMO

INTRODUCTION: Colonoscopy is a crucial procedure for various clinical purposes, including screening for colorectal cancer. Adequate bowel preparation is essential for its success. Poor bowel preparation can lead to bad outcomes. An objective assessment of bowel preparation quality is typically only possible after the colonoscope is inserted. This study aimed to objectively correlate the clarity of last rectal effluent, directly collected in a transparent container, with the quality of bowel preparation, and compare it with patient-reported descriptions. METHODS: This prospective, single-centre, case-control study obtained ethical clearance and included patients aged >18 years undergoing colonoscopies. Cases included patients who collected the last rectal effluent and took photographs, while controls relied on verbal descriptions. Data collected included demographics, clinical information, bowel preparation quality, and lastly, stool clarity. A statistical analysis was performed to identify correlations and associations. RESULTS: Of the 70 included patients, 45 were male. The mean age was 35.8 ± 14.3 years. Cases had a higher mean age (37.8 ± 14.6). A higher number of cases had comorbidities (11, 68.8%). Photographic recording of the last rectal effluent was not associated with the adequacy of bowel preparation. Thin yellow fluid was the most common last-rectal effluent clarity (33, 47.1%). Thin, clear fluid was significantly associated with adequate bowel preparation. CONCLUSION: Objective assessment of last rectal effluent clarity correlates with the quality of bowel preparation. This can improve the quality of bowel preparation for colonoscopies and potentially reduce the need for repeat procedures, contributing to better patient outcomes and cost savings in healthcare systems.

14.
Afr J Paediatr Surg ; 21(2): 134-137, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38546252

RESUMO

ABSTRACT: Inflammatory myofibroblastic tumour in paediatric patients present with a diagnostic dilemma because of its clinical, radiological and histopathological features overlapping with other mesenchymal tumours common in this age. Because of its rarity, the exact features are still unclear. Here, we are reporting clinical, radiological and histopathological appearances of two such cases. In both cases, the exact diagnosis was confirmed only after immunohistochemistry. There is a need for further detailed study to exactly determine the natural course and prognosis of these tumours.


Assuntos
Neoplasias de Tecido Muscular , Criança , Humanos , Neoplasias de Tecido Muscular/diagnóstico
15.
Afr J Paediatr Surg ; 21(2): 138-140, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38546253

RESUMO

ABSTRACT: Gastric teratomas are very rare tumours. They present with upper abdomen distension which can easily be confused with other common conditions with mass per abdomen in the paediatric age group. Surgical excision is curative for gastric teratomas. The diagnosis is confirmed by radiological evaluation followed by histopathological analysis of excised specimen. We are reporting two such cases of gastric teratomas who presented with complaints of upper abdomen distension. They were evaluated with radiological imaging and successfully managed by surgical excision.


Assuntos
Teratoma , Humanos , Criança , Radiografia , Teratoma/diagnóstico por imagem , Teratoma/cirurgia
16.
Cureus ; 16(1): e51844, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38327920

RESUMO

Accessory breast tissue, associated with polymastia and polythelia, presents challenges and concerns, particularly when patients fear malignancy. While occurring in 1-6% of cases, accessory breasts, often located bilaterally in the axillae, necessitate careful examination. We report a 35-year-old male with painful axillary swelling who underwent high-resolution ultrasonography (HR-USG) and fine-needle aspiration cytology (FNAC), revealing proper axillary breast tissue. Subsequent excision biopsy confirmed accessory axillary breast without malignancy. In conclusion, surgical removal of accessory axillary breasts is advisable, addressing cosmetic concerns and minimizing cancer risks.

17.
ACS Infect Dis ; 10(3): 845-857, 2024 Mar 08.
Artigo em Inglês | MEDLINE | ID: mdl-38363869

RESUMO

Myeloid differentiation factor 2 (MD2), the TLR4 coreceptor, has been shown to possess opsonic activity and has been implicated in phagocytosis and intracellular killing of Gram-negative bacteria. However, any MD2 protein segment involved in phagocytosis of Gram-negative bacteria is not yet known. A short synthetic MD2 segment, MD54 (amino acid regions 54 to 69), was shown to interact with a Gram-negative bacterial outer membrane component, LPS, earlier. Furthermore, the MD54 peptide induced aggregation of LPS and facilitated its internalization in THP-1 cells. Currently, it has been investigated if MD2-derived MD54 possesses any opsonic property and role in phagocytosis of Gram-negative bacteria. Remarkably, we observed that MD54 facilitated agglutination of Gram-negative bacteria, Escherichia coli (ATCC 25922) and Pseudomonas aeruginosa (ATCC BAA-427), but not of Gram-positive bacteria, Bacillus subtilis (ATCC 6633) and Staphylococcus aureus (ATCC 25923). The MD54-opsonized Gram-negative bacteria internalized within PMA-treated THP-1 cells and were killed over a longer incubation period. However, both internalization and intracellular killing of the MD54-opsonized Gram-negative bacteria within THP-1 phagocytes were appreciably inhibited in the presence of a phagocytosis inhibitor, cytochalasin D. Furthermore, MD54 facilitated the clearance of Gram-negative bacteria E. coli (ATCC 25922) and P. aeruginosa (ATCC BAA-427) from the infected BALB/c mice whereas an MD54 analog, MMD54, was inactive. Overall, for the first time, the results revealed that a short MD2-derived peptide can specifically agglutinate Gram-negative bacteria, act as an opsonin for these bacteria, and facilitate their phagocytosis by THP-1 phagocytes. The results suggest that the MD54 segment could have a crucial role in MD2-mediated host-pathogen interaction involving the Gram-negative bacteria.


Assuntos
Escherichia coli , Lipopolissacarídeos , Animais , Camundongos , Lipopolissacarídeos/metabolismo , Escherichia coli/metabolismo , Fagocitose , Macrófagos/metabolismo , Bactérias Gram-Negativas/metabolismo
18.
Pancreas ; 53(3): e260-e267, 2024 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-38345909

RESUMO

BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) is a deadly disease due to the lack of early detection. Because chronic pancreatitis (CP) patients are a high-risk group for pancreatic cancer, this study aimed to assess the differential miRNA profile in pancreatic tissue of patients with CP and pancreatic cancer. METHODS: MiRNAs were isolated from formalin-fixed paraffin-embedded pancreatic tissue of 22 PDAC patients, 18 CP patients, and 10 normal pancreatic tissues from autopsy (C) cases and processed for next-generation sequencing. Known and novel miRNAs were identified and analyzed for differential miRNA expression, target prediction, and pathway enrichment between groups. RESULTS: Among the miRNAs identified, 166 known and 17 novel miRNAs were found exclusively in PDAC tissues, while 106 known and 10 novel miRNAs were found specifically in CP tissues. The pathways targeted by PDAC-specific miRNAs and differentially expressed miRNAs between PDAC versus CP tissues and PDAC versus control tissues were the proteoglycans pathway, Hippo signaling pathway, adherens junction, and transforming growth factor-ß signaling pathway. CONCLUSIONS: This study resulted in a set of exclusive and differentially expressed miRNAs in PDAC and CP can be assessed for their diagnostic value. In addition, studying the role of miRNA-target gene interactions in carcinogenesis may open new therapeutic avenues.


Assuntos
Carcinoma Ductal Pancreático , MicroRNAs , Neoplasias Pancreáticas , Pancreatite Crônica , Humanos , MicroRNAs/genética , MicroRNAs/metabolismo , Neoplasias Pancreáticas/diagnóstico , Neoplasias Pancreáticas/genética , Neoplasias Pancreáticas/metabolismo , Carcinoma Ductal Pancreático/diagnóstico , Carcinoma Ductal Pancreático/genética , Carcinoma Ductal Pancreático/metabolismo , Pâncreas/patologia , Pancreatite Crônica/diagnóstico , Pancreatite Crônica/genética , Pancreatite Crônica/complicações , Hormônios Pancreáticos/metabolismo , Perfilação da Expressão Gênica
19.
Cureus ; 16(2): e53526, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38314387

RESUMO

Congenital pulmonary airway malformations (CPAM) compose the major part of congenital lung malformations (CLM) and have traditionally been treated by pulmonary lobectomy. In terms of surgical strategy, lobectomy has conventionally been the preferred treatment for CPAM localized to a single lobe. More recently, alternative approaches including lung-sparing resections (LSR), such as wedge or non-anatomic resections and segmentectomy, have been suggested. In asymptomatic CPAM early surgical resection is often shown to reduce infection and malignancy development. We describe two patients who were diagnosed with CPAM when being evaluated for respiratory tract infection. Patient 1 (P1) was a two-month-old infant weighing 4 kg with glucose-6-phosphate dehydrogenase (G6PD) deficiency and Patient 2 (P2) was a toddler aged one year, nine months weighing 9 kg. P1 underwent LSR for the CPAM diagnosed in the left upper lobe of the lung with conventional mechanical ventilation whilst right upper lobectomy was performed in P2 using one/single lung ventilation. In both cases, LSR and right upper lobectomy led to an uneventful postoperative recovery with no complications reported.

20.
Eur J Cancer ; 200: 113560, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38306841

RESUMO

BACKGROUND: Neoadjuvant chemotherapy (NACT) with TPF (docetaxel, cisplatin, and 5FU) is one of the treatment options in very locally advanced oral cancer with a survival advantage over PF (cisplatin and 5FU). TP (docetaxel and cisplatin) has shown promising results with a lower rate of adverse events but has never been compared to TPF. METHODS: In this phase 3 randomized superiority study, adult patients with borderline resectable locally advanced oral cancers were randomized in a 1:1 fashion to either TP or TPF. After the administration of 2 cycles, patients were evaluated in a multidisciplinary clinic and further treatment was planned. The primary endpoint was overall survival (OS) and secondary endpoints were progression-free survival (PFS) and adverse events. RESULTS: 495 patients were randomized in this study, 248 patients in TP arm and 247 in TPF arm. The 5-year OS was 18.5% (95% CI 13.8-23.7) and 23.9% (95% CI 18.1-30.1) in TP and TPF arms, respectively (Hazard ratio 0.778; 95% CI 0.637-0.952; P = 0.015). Following NACT, 43.8% were deemed resectable, but 34.5% underwent surgery. The 5-year OS was 50.7% (95% CI 41.5-59.1) and 5% (95%CI 2.9-8.1), respectively, in the surgically resected versus unresected cohort post NACT (P < 0.0001). Grade 3 or above adverse events were seen in 97 (39.1%) and 179 (72.5%) patients in the TP and TPF arms, respectively (P < 0.0001). CONCLUSION: NACT with TPF has a survival benefit over TP in borderline resectable oral cancers, with an increase in toxicity which is manageable. Patients who undergo surgery achieve a relatively good, sustained survival.


Assuntos
Carcinoma de Células Escamosas , Neoplasias de Cabeça e Pescoço , Neoplasias Bucais , Adulto , Humanos , Docetaxel/uso terapêutico , Platina/uso terapêutico , Cisplatino , Terapia Neoadjuvante , Fluoruracila , Taxoides/uso terapêutico , Carcinoma de Células Escamosas/tratamento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Neoplasias Bucais/tratamento farmacológico , Neoplasias Bucais/cirurgia , Quimioterapia de Indução/métodos , Neoplasias de Cabeça e Pescoço/tratamento farmacológico
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