Current radiopharmaceuticals最新文献

{"title":"Mitigation of Radiation-induced Acute Hematopoietic System and Intestine Injury by Resveratrol-loaded Polymeric Nanoparticles after Whole Body Irradiation in Mice.","authors":"Mohammad Mohammadi, Amir Kiani, Faranak Aghaz, Elham Arkan, Khodabakhsh Rashidi, Masoud Najafi","doi":"10.2174/0118744710335266250206060602","DOIUrl":"https://doi.org/10.2174/0118744710335266250206060602","url":null,"abstract":"<p><strong>Background: </strong>Radiation-induced damage to the hematopoietic and gastrointestinal systems, especially the intestine, is a major concern for individuals exposed to whole-body radiation during an accident. Resveratrol has shown potential in mitigating radiation-induced toxicity, but its efficacy may be limited by its low bioavailability. In this study, we aimed to evaluate the effectiveness of resveratrol-loaded polymeric-based nanocapsules in mitigating radiation-induced injury in the hematopoietic system and intestine after whole-body exposure to radiation.</p><p><strong>Methods: </strong>Sixty male mice were randomly divided into four groups: control, radiation (single dose of 7.2 Gy of X-ray) only, resveratrol-loaded polymeric-based nanocapsules (RES-ACN) only, and radiation plus RES-ACN. Mice were exposed to a single dose of 7.2 Gy of X-ray radiation. RES-ACN was administered to the mice starting 24h after irradiation up to day 7 post-irradiation. Then, blood and tissue samples were collected for complete blood count and histopathological and biochemical evaluation. Survival analyses were also conducted.</p><p><strong>Results: </strong>The findings showed that RES-ACN significantly mitigated radiation-induced injury to the hematopoietic system and intestine. The histopathological evaluation showed the mitigation of villi shortening, inflammation, and mucous layer thickness following treatment with RES-ACN. Biochemical evaluation also demonstrated a significant increase in the activity of glutathione peroxidase and superoxide dismutase and a significant reduction in the concentrations of malondialdehyde and nitric oxide. Treatment with RES-ACN also showed a significant improvement in some of the blood parameters and increased survival compared to radiation only.</p><p><strong>Conclusion: </strong>The findings suggest that resveratrol-loaded polymeric-based nanocapsules can be an effective approach to mitigate radiation-induced damage to the hematopoietic system and intestine after whole-body exposure to X-ray radiation in mice. Further research is needed to explore the optimal dose and timing of resveratrol administration and to investigate the potential for clinical translation of this approach.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143406293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of the p53/miR-34a/SIRT1 Feedback Loop in Metformin-induced Radiosensitivity of Colorectal Cancer Cells.","authors":"Ensiyeh Bahadoran, Yazdan Zafari, Ali Homaei, Manijeh Jalilvand, Sahar Moghbelinejad","doi":"10.2174/0118744710331660250127115004","DOIUrl":"https://doi.org/10.2174/0118744710331660250127115004","url":null,"abstract":"<p><strong>Introduction: </strong>Metformin induces radiation sensitivity in cancer cells, including colorectal cancer cells; however, the exact molecular mechanisms underlying its radiosensitive effects are not yet known. In this study, we investigated the role of the p53/miR-34a/SIRT1 pathway in the radiosensitivity of colon cancer cells.</p><p><strong>Methods: </strong>The study was carried out from 2020 to 2022 at the Qazvin University of Medical Science's Cellular and Molecular Research Center. Two colorectal cancer cell lines (SW480 and SW620) obtained from primary and secondary tumors derived from a single patient were used as the study samples. After subjecting the cells to 50 Gy of radiation, we generated radioresistant cell lines. Resistant cells were treated with 50 μM metformin. Metformin-treated and untreated resistant cells constituted the study groups. The expression levels of miR-34-a and Sirtunin1 (SIRT1) were evaluated using Quantitative Real-time PCR. The rates of cell proliferation and apoptosis were assessed using a Cell Counting Kit-8 (CCK-8) assay and flow cytometry. Western blot analysis was performed to quantify the expression of proteins. For statistical analysis, the Student's ttest was carried out to examine the mean differences between the two groups, and analysis of variance (ANOVA) was used to examine additional groups.</p><p><strong>Results: </strong>Our results showed that the expression of miR-34-a was downregulated (0.29 ± 0.11) in radiation-resistant cancer cells (P <0.001), while the expression of SIRT-1 was upregulated (4.5 ± 0.25) (P <0.001). Metformin increased the radiosensitivity of colon cancer cells in a time- and dose-dependent manner. Treatment with 50 μM metformin after 48h caused decreased cell viability and increased apoptosis in resistant cells. We observed downregulation of SIRT-1 (1.1 ± 0.45) and upregulation of miR-34-a (4.3 ± 1.3) (P <0.001) in metformin-treated cells. In contrast, western blotting results showed the upregulation of acetylated P53 in metformin-treated cells. Metformin function was reversed by SIRT1 inhibitors or by transfection with miR-34-a overexpressing plasmids.</p><p><strong>Conclusion: </strong>Based on these results, one of the radiosensitivity mechanisms of metformin in colorectal cancer is the modulation of the p53/miR-34a/SIRT1 loop.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harnessing Radionuclides: Unveiling the Promising Role of Radiopharmaceuticals in Cancer Theranostics and Palliative Care.","authors":"Mihai Cozmin, Ionut Iulian Lungu, Radu Cernei, George Alexandru Marin, Letitia Doina Duceac, Gabriela Calin, Marius Gabriel Dabija, Cristian Gutu, Elena Roxana Bogdan Goroftei, Alina Stefanache, Tudor Ciuhodaru","doi":"10.2174/0118744710337420250102054532","DOIUrl":"https://doi.org/10.2174/0118744710337420250102054532","url":null,"abstract":"<p><strong>Background: </strong>In the context of modern oncology, radiogenic elements have emerged as pivotal tools for targeted cancer therapies. Elements like Iodine-131 and Yttrium-90 offer unique radiological properties that allow precise treatment delivery. This article explores their growing importance and potential in reshaping the landscape of cancer therapy.</p><p><strong>Methods: </strong>Utilizing a systematic literature search, relevant studies, clinical trials, and research articles were collected from databases. The selected material was scrutinized to extract insights into the mechanisms, applications, advantages, and challenges of radiogenic elements. These results are combined in the study to give a perceptive picture of how contemporary oncology treatment is developing.</p><p><strong>Results: </strong>The article reveals a comprehensive analysis of the outcomes derived from the study of radiogenic elements in contemporary cancer treatment. The results highlight the diverse applications of radionuclides like Iodine-131, Yttrium-90, and actinides in targeted therapies. It showcases their ability to selectively damage cancer cells while sparing healthy tissues, emphasizing precision and efficacy. The review underscores the increasing importance of personalized medicine, combination therapies, and the potential of emerging alpha-particle-based treatments. Furthermore, the results shed light on the challenges posed by radiation safety and potential side effects, prompting a need for vigilant management. This comprehensive examination of results provides a nuanced understanding of the pivotal role that radiogenic elements play in shaping the future of modern oncology therapy.</p><p><strong>Conclusion: </strong>The article examines the role of radiogenic elements in contemporary cancer treatment. It highlights the significance of elements like 131I, 90Y, and actinides in targeted therapies, discussing their mechanisms and applications. The article emphasizes personalized medicine, combination therapies, and emerging alpha-particle-based treatments. Challenges, including radiation safety and side effects, are also addressed. The review anticipates a promising future where radiogenic elements contribute to precise, effective, and patient-centered cancer care.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143022501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Estimation Value of 99mTc-MAA in Comparison with 90Y-PET/MR-based Dosimetry in Selective Internal Radiation Therapy (SIRT) for Liver Malignancies.","authors":"Nami Yeyin, Mohammad Abuqbeitah, Aysel Namazova, Mustafa Demir","doi":"10.2174/0118744710333819250112153859","DOIUrl":"https://doi.org/10.2174/0118744710333819250112153859","url":null,"abstract":"<p><strong>Aim: </strong>This study intended to compare the radiation dose estimates to target and nontarget liver compartments from 99mTc-MAA SPECT/CT and 90Y-PET/MR scans in liver tumors treated by 90Y-glass microspheres.</p><p><strong>Material and methods: </strong>Dose estimation was performed for twenty-three eligible patients (13M, 10F) after 99mTc-MAA simulation using SPECT/CT imaging, and over 90Y-PET/MR images after 90Y-microsphere therapy. Simplicit90Y™ software was used for voxel-based dosimetry over the liver parenchyma. Dose estimates were obtained for whole healthy liver (HL), healthy injected liver (HIL), and tumor volumes. Pearson correlation, Bland-Altman plot, and Wilcoxon signed-ranks test were used for statistical analysis.</p><p><strong>Results: </strong>The mean tumor dose was 270±111 Gy, the whole liver parenchyma dose was 26 ±12 Gy, and the healthy injected liver dose was 55±18 Gy from 99mTc-MAA simulation. 90YPET/ MR dosimetry yielded a mean tumor dose of 271±125 Gy, a HIL mean dose of 54±18 Gy, and a liver parenchyma dose of 25±12 Gy. An excellent agreement was demonstrated between tumor doses (R2=0.90) and liver doses (R2=0.87), while the agreement was less for HIL doses (R2=0.80). Wilcoxon signed-ranks test yielded no significant difference between the dose estimates for all liver compartments.</p><p><strong>Conclusion: </strong>It was deduced that 99mTc-MAA SPECT/CT simulation provides valuable dose prediction in 90Y-glass microsphere therapy. Despite the difference in volume measurements and dose estimates with 90Y-PET/MR, the predictive value of the 99mTc-MAA simulation was not affected.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143001700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preclinical Aspects of [89Zr]Zr-DFO-Rituximab: A High Potential Agent for Immuno-PET Imaging.","authors":"Zahra Rouhollahi, Seyed Mahmoud Reza Aghamiri, Hassan Yousefnia, Behrouz Alirezapour, Ali Moghaddasi, Samaneh Zolghadri","doi":"10.2174/0118744710326742241018050220","DOIUrl":"https://doi.org/10.2174/0118744710326742241018050220","url":null,"abstract":"<p><strong>Background: </strong>An early diagnosis of cancer can lead to choosing more effective treatment and increase the number of cancer survivors. In this study, the preparation and preclinical aspects of [89Zr]Zr-DFO-Rituximab, a high-potential agent for PET imaging of Non- Hodgkin Lymphoma (NHL), were evaluated.</p><p><strong>Methods: </strong>DFO was conjugated to rituximab monoclonal antibody (mAb), and DFO-rituximab was successfully labeled with zirconium-89 (89Zr) at optimized conditions. The stability of the complex was assessed in human blood serum and PBS buffer. Radioimmunoreactivity (RIA) of the radioimmunoconjugate (RIC) was evaluated on CD20-overexpressing Raji cell line and CHO cells. The biodistribution of the radiolabeled mAb was studied in normal and tumorbearing rodents. Finally, the absorbed dose in human organs was estimated.</p><p><strong>Results: </strong>The radiolabeled compound was prepared with radiochemical purity (RCP) >99% (RTLC) and a specific activity of 180±1.8 GBq/g. The RCP of the final complex PBS buffer and human blood serum was higher than 95%, even after 48 h post incubation. The RIA assay demonstrated that more than 63% of the radiolabeled compound (40 ng/ml, 0.5 mL) was bound to 5×106 Raji cells. The biodistribution of the final product in tumor-bearing mice showed a high accumulation of the RIC in the tumor site in all intervals post-injection. Tumor/ non-target ratios were increased over time, and longer imaging time was suggested. The dosimetry data indicated that the liver received the most absorbed dose after the complex injection.</p><p><strong>Conclusion: </strong>[89Zr]Zr-DFO-Rituximab represents a significant advancement in the field of oncological imaging and offers a robust platform for both diagnostic and therapeutic applications in the management of B-cell malignancies.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142496720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Ketoprofen Solubility: A Strategic Approach Using Solid Dispersion and Response Surface Methodology.","authors":"Devika Tripathi, Dinesh Kumar Sharma, Jagannath Sahoo","doi":"10.2174/0118744710311951241018054453","DOIUrl":"https://doi.org/10.2174/0118744710311951241018054453","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Background: &lt;/strong&gt;In the pharmaceutical sciences, the solubility profile of therapeutic molecules is crucial for identifying and formulating drugs and evaluating their quality across the drug discovery pipeline based on factors like oral bioavailability, metabolic transformation, biodistribution kinetics, and potential toxicological implications. The investigation aims to enhance the solubility parameters of ketoprofen (BCS-II class), which exhibits low solubility and high permeability.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods: &lt;/strong&gt;In this method, hydrotrope blends of aromatic sodium benzoate and electrolyte sodium acetate were employed to enhance the solubility parameter of ketoprofen. Several batches of solid dispersion of ketoprofen were made using a solvent evaporation method, and the response surface method 3² factorial design was used to find the best one. The optimised formulation, KSD9, underwent in-vitro drug dissolution, DSC, pXRD, and SEM studies.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;The optimized batch demonstrated substantial improvement in ketoprofen solubility, attributed to mixed hydrotropy. The results indicated that both solubility and %CDR improved when hydrotropes were employed, suggesting a direct proportionality between the rise in solubility and %CDR. Formulations KSD1-KSD9 exhibited solubility enhancements ranging from 2.23 to 5.77-fold, along with an elevation in %CDR from 72.28% to 94.76%. This implies that the %CDR was modulated by the hydrotropes, specifically influenced by the concentration levels of the independent variables. An increase in hydrotrope levels corresponded to an increase in %CDR. The positive coefficients in the quadratic equation for %CDR underscored the significant role of these independent variables in augmenting the in-vitro release of Ketoprofen. Similarly, during a comparative dissolution investigation, the optimized KSD9 formulation exhibited remarkable solubility and drug content compared to conventional Ketoprofen dispersible tablets.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusion: &lt;/strong&gt;The synergistic effect of combining two hydrotropic agents significantly increased the solubility of ketoprofen by up to 58 times. The results indicated that the independent variables exerted a positive influence on solubility and %CDR. Furthermore, the responses were contingent on the specific hydrotropes selected, which functioned as the independent variables. Analyzing the r² and ANOVA results suggested that the dependent variables aligned well with the chosen model. Visual representations, such as the 3D response surface plot and contour plot, demonstrated the impact of each hydrotrope individually and when combined. Overall, employing hydrotropes led to improved solubility and %CDR, highlighting a direct proportionality between the rise in solubility and %CDR. Mixed hydrotropic lessens the toxicity associated with individual hydrotrope concentrations while also offering a sustainable and eco-friendly alternative. This study pave","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142496719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Apigenin's Influence on Inflammatory and Epigenetic Responses in Rat Lungs After Radiotherapy.","authors":"Fatemeh Rajabinasab, Pooya Hajimirzaei, Fatemeh Ramezani, Fariborz Moayer, Fazel Gorjipour, Alireza Nikoofar, Leila Hasanzadeh, Michael R Hamblin, Atousa Janzadeh, Reza Paydar","doi":"10.2174/0118744710336823241011095632","DOIUrl":"https://doi.org/10.2174/0118744710336823241011095632","url":null,"abstract":"<p><strong>Introduction: </strong>The lung is a moderately radio-sensitive organ. When cells are damaged due to accidental radiation exposure or treatment, they release molecules that lead to the recruitment of immune cells, accumulating inflammatory cytokines at the site of damage. Apigenin (Api) is a natural flavonoid known for its anti-inflammatory properties. In this study, we investigated the radioprotective properties of Api in the lung.</p><p><strong>Methods: </strong>Thirty-six Wistar rats were randomly assigned to nine groups: control, radiation (Rad), CMC+Rad, Api10+Rad, and Api20+Rad. Api was administered with an intraperitoneal injection for 7 days, after which the rats were irradiated with 6 Gy whole-body X-ray. At 6 and 72 hours post-irradiation, the rats were euthanized, and their lung tissue was extracted.</p><p><strong>Results: </strong>Radiation led to increased alveolar wall thickness and the infiltration of macrophages and lymphocytes. Furthermore, the expression levels of inflammatory factors such as a nuclear factor of kappa light polypeptide gene enhancer in B-cells (NF-ĸB), Glycogen synthase kinase-3 beta (GSK-3β), transforming growth factor-beta1 (TGF-β1), and epigenetic factors including DNA methyltransferase 3a (DNMT3a) and Histone deacetylase 2 (HDAC2) were elevated in the lung tissue following radiation. Meanwhile, the expression level of IκB-α decreased. However, administration of Api (at both 10&20 mg/kg) reversed the adverse effects of radiation.</p><p><strong>Conclusion: </strong>Api administration mitigated radiation-induced lung damage by reversing inflammatory and epigenetic changes.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142496718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Analysis of the Radiosensitiser Applications in the Biomedical Field.","authors":"Teng Sheng Lim, Irman Abdul Rahman, Aminah Umar, Norsyahidah Mohd Hidzir, Kenton Paul Arkill, Razinah Sharif, Mohd Anuar Jonet, Hur Munawar Kabir Mohd, Faizal Mohamed","doi":"10.2174/0118744710269842240825160247","DOIUrl":"https://doi.org/10.2174/0118744710269842240825160247","url":null,"abstract":"<p><strong>Background: </strong>Various types of radiosensitisers have been introduced from the past until the present day for applications in the biomedical field. However, there is a lack of understanding and comparison between the various parameters introduced in addition to a lack of consensus among researchers on the optimal radiosensitiser for applications in the biomedical field.</p><p><strong>Objective: </strong>This review aimed to investigate the usage of radiosensitisers in the biomedical field, determine their important parameters, and suggest radiosensitisers with potential among the analysed radiosensitisers.</p><p><strong>Results and conclusion: </strong>This review has discussed several parameters for radiosensitisers, including median lethal dose, cell survival, tumour size, cell viability, Dose Enhancement Factor (DEF), Reactive Oxygen Species (ROS) concentration, radiosensitiser production complexity, radiosensitiser administration technique, and radiosensitiser toxicity. General trends regarding the development of radiosensitisers, including the types, effectiveness, and their production complexity, have also been discussed within this review article.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142119212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Left Ventricular Wall Motion as an Additional Valuable Parameter in Diabetic Patients with Normal Myocardial Perfusion Imaging.","authors":"Amirhesam Davari, Fatemeh Jalali-Zefrei, Bahareh Gholami-Chabok, Shiva Tabaghi, Soghra Farzipour, Kourosh Delpasand, Seyed Mehdi Mousavi","doi":"10.2174/0118744710312688240814100448","DOIUrl":"https://doi.org/10.2174/0118744710312688240814100448","url":null,"abstract":"<p><strong>Background: </strong>Gated SPECT is an established technique for assessment of left ventricular function in cardiovascular disease patients. However, there is little information about the influence of diabetes mellitus on gated SPECT parameters. This study was established to assess gated SPECT parameters in Diabetes Mellitus (DM) and non-diabetes mellitus (non-DM) patients with normal Myocardial Perfusion Imaging (MPI).</p><p><strong>Methods: </strong>In this analytical cross-sectional study, 314 patients (157 DM, 157 non-DM) with normal MPI were enrolled. Prevalence of risk factors for CAD like hypertension (HTN), and dyslipidemia were found to be significantly higher (p <0.01) in DM patients compared to non-DM.</p><p><strong>Results: </strong>No statistically significant difference was observed among the TID, ESV, EDV, PFR, TTPF, and Wall Thickness (WT) parameters between DM and non-DM patients. Wall motion (Wm) in DM patients was significantly higher compared to non-DM patients. (3.9 ± 0.51 vs. 2.69 ± 0.48 for DM and non-DM patients, respectively, p-value:0.01). Also, there was no significant difference in Wm in the two groups with and without HTN. This shows the independent effect of DM on the Wm.</p><p><strong>Conclusion: </strong>This study believes that the Wm parameter should be noted for the early diagnosis or prevention of heart disease in DM patients. These findings can indicate the gradual changes in the movements of the left ventricle and the beginning of the progression of diabetic cardiomyopathy.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142281760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pressed Solid Target Production of 89Zr and its Application for Antibody Labelling.","authors":"Anjli Shrivastav, Sonu Maurya, Manish Dixit, Sarita Kumari, Sanjay Gambhir","doi":"10.2174/0118744710318544240715061530","DOIUrl":"https://doi.org/10.2174/0118744710318544240715061530","url":null,"abstract":"<p><strong>Objectives: </strong>Zirconium-89 ( 89Zr, t1/2=3.27d) is an important + emitting radionuclide used in Positron Emission Tomography (PET) immuno studies due to its unique characteristics and increased demand due to simple and cost-effective production capacity. Production of 89Zr is achieved primarily through solid natural yttrium targets via different target preparation methodologies, such as electrodeposition, pressed foils, and spark plasma sintering. In this study, we have investigated the pressed solid target methodology.</p><p><strong>Methods: </strong>The Yttrium Oxide (Y2O3) powder was pressed to pellet form and stacked over a different back support plate, such as platinum (Pt), niobium (Nb), and tantalum (Ta). The target was irradiated with approximately 12 MeV proton beam for 10-60 minutes at 20µA current. The irradiated target was purified through a solid phase extraction method via hydroxamate-based resin by manual or automatic approach. The purified 89Zr was analyzed using gamma scintigraphy, and specific activity was calculated through Deferoxamine (DFO) chelation.</p><p><strong>Results: </strong>89Zr radionuclide via pressed target was effectively produced with a production yield of 20-30 MBq/µA.h, and the purification was achieved in 35 minutes with (87.46)% average recovery and >98% purity while using automated purification, but manual purification took 2 hours with (91 ± 2)% recovery and >98% purity. The production yield was comparable to the reported pressed target approach. Deferoxamine (DFO) chelation with 89Zr-oxalate was performed with purity >98% and specific activity of 25-30 µCi/mmol.</p><p><strong>Conclusion: </strong>In this study, we explored the production of 89Zr by pressed targets and purification via manual or automated methods with good radionuclide purity. The chelation with DFO or its analog was performed with good labeling efficiency and stability</p>.</p>","PeriodicalId":10991,"journal":{"name":"Current radiopharmaceuticals","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141747686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}