Radiosynthesis and in silico bioevaluation of 131 I-Sulfasalazine as a highly selective radiotracer for imaging of ulcerative colitis

xlomafota13 shared this article with you from Inoreader Radiosynthesis and in silico bioevaluation of <sup>131</sup> I-Sulfasalazine as a highly selective radiotracer for imaging of ulcerative colitis Via radioactive iodine Chem Biol Drug Des. 2021 Jul 27. doi: 10.1111/cbdd.13929. Online ahead of print. ABSTRACT This study demonstrated the tracking of ulcerative colitis, which is considered a stressful immune disease. Although there are many ways to test for this disease including dependence on gases, dyes, and painful anal endoscopy, these treatment modalities have many disadvantages. Hence, it is the utmost need of time to discover new methods to detect this chronic immune disease and to avoid the d efects of traditional methodologies. Sulfasalazine (SSD) was labeled with iodine-131 (Half-life: 8 days, Energy: 971 keV) under optimum reaction conditions including the amount of reducing agent, pH factor, Chloramine-T (Ch-T) amount, and incubation period. Characterization was performed using 1 H/ 13 C-NMR, ESI-MS, and HPLC (UV/ Radio) techniques. The biodistribution study was performed in normal and ulcerative mice models as well as in silico molecular docking study was performed to evaluate the possible mechanism of action to target peroxisome proliferator-activated receptor gamma (PPARγ). The high radiolabeling yield of [131 I]-sulfasalazine ([131 I]-SSD) was achieved ≥ 90% through the direct labeling method with radioactive iodine-131 in the presence of chloramine-T (100 μg). The radiotracer [131 I]-SSD was observed to be stable in normal saline and freshly eluted serum up to 12 h at ambient temperature (37°C ± 2°C). The radiotracer [131 I]-SSD showed the highest uptake in the targeted organ (i.e. ulcerative colon) which was observed to be ≥ 75% injected dose per gram (% ID/g) organ for 24 h post-injection (p.i). Furthermore, in silico data collected from molecular modeling analysis of SSD and [131 I]-SSD with antimicrobial protein (PDB code: 3KEG) and peroxisome proliferator-activated receptor-gamma (PPARγ) (PDB code: 4XTA) showed azoreductase activity and high binding potential for PPAR-γ site, respectively. The results of biological studies obtained in this study enlighten the usefulness of radiotracer [131 I]-SSD as a potential imaging agent for ulcerative colitis. PMID:34314572 | DOI:10.1111/cbdd.13929 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Prevalence of Hashimoto Thyroiditis in Adults With Papillary Thyroid Cancer and Its Association With Cancer Recurrence and Outcomes

xlomafota13 shared this article with you from Inoreader Prevalence of Hashimoto Thyroiditis in Adults With Papillary Thyroid Cancer and Its Association With Cancer Recurrence and Outcomes Via radioactive iodine JAMA Netw Open. 2021 Jul 1;4(7):e2118526. doi: 10.1001/jamanetworkopen.2021.18526. ABSTRACT IMPORTANCE: Hashimoto thyroiditis (HT) has been suggested to be associated with papillary thyroid cancer (PTC) development. However, its association with PTC progression remains unclear. OBJECTIVE: To examine the association between HT and PTC presentation and outcomes. DESIGN, SETTING, AND PARTICIPANTS: This retrospective cohort study included a review of patients aged 18 to 75 years who had pathologically confirmed PTC treated at a single center in China from January 1, 2001, to December 31, 2014. Data analysis was performed from November 1 to December 31, 2020. EXPOSURES: Coexistent HT was defined according to evaluation of postoperative paraffin sections. MAIN OUTCOMES AND MEASURES: The primary outcome was the association of HT with PTC-related mortality, assessed using Cox proportional hazards regression models. The secondary outcome was the association of HT with aggressive characteristics and structural recurrence of PTC, assessed using logistic regression and Cox proportional hazards regression with and without adjustment for related factors. RESULTS: Of 9210 patients with PTC (mean [SD] age, 43.6 [12.0] years; 6872 [75%] women) included in the analysis, 1751 (19%) had HT. In the logistic regression model, HT was negatively associated with frequencies of primary tumor size of 4 cm or greater (adjusted odds ratio [aOR], 0.20; 95% CI , 0.12-0.33; P < .001), gross extrathyroidal extension (aOR, 0.44; 95% CI, 0.36-0.54; P < .001), extranodal extension (aOR, 0.66; 95% CI, 0.55-0.80; P < .001), and distant metastasis (aOR, 0.17; 95% CI, 0.04-0.71; P = .02). After a median follow-up of 85 months (range, 12-144 months), 131 PTC-related deaths were identified in the cohort; 2 patients who died had HT. Patients with HT had significantly superior outcomes compared with patients without HT in terms of unadjusted 10-year disease-specific survival (99.9% vs 96.6%; log-rank P < .001) and recurrence-free survival (92.0% vs 87.6%; log-rank P = .001). After adjusting for sex, age, primary tumor size, extrathyroidal extension, lymph node metastasis, distant metastasis, extent of surgery, and radioactive iodine ablation, HT was associated with decreased PTC-related mortality (hazard ratio [HR], 0.19; 95% CI, 0.05-0.76; P = .02). Stratified analysis showed that HT was associated with less frequent structural recurrence in patients with extrathyroidal extension (HR, 0.52; 95% CI, 0.38-0.71; P < .001; P = .002 for interaction) or after total thyroidectomy (HR, 0.50; 95% CI, 0.35-0.69; P < .001; P = .009 for interaction). CONCLUSIONS AND RELEVANCE: In this cohort study, patients with coexistent HT had less aggressive characteristics at presentation and better outcomes of PTC than did patients without HT. The findings suggest that autoimmune thyroiditis has a protective role in association with thyroid cancer. PMID:34313737 | DOI:10.1001/jamanetworkopen.2021.18526 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Designable Assembly of Aluminum Molecular Rings for Sequential Confinement of Iodine Molecules

xlomafota13 shared this article with you from Inoreader Designable Assembly of Aluminum Molecular Rings for Sequential Confinement of Iodine Molecules Via radioactive iodine Angew Chem Int Ed Engl. 2021 Jul 27. doi: 10.1002/anie.202107227. Online ahead of print. ABSTRACT Although numerous adsorbent materials have been reported for radioactive iodine capture, demands for the development of new absorbents that are economically viable and featured with reliable synthetic protocols still exist. Herein, in this paper, a coordination-driven self-assembly strategy towards adsorbents for sequential confinement of iodine molecules is reported. It should be noti ced that these adsorbents are versatile heterometallic frameworks constructed from aluminum molecular rings of varying size, flexible copper ions and conjugated carboxylate ligands. Additionally, these materials can quickly remove iodine from cyclohexane solutions with a high removal rate (98.8%) and considerable loading capacity (555.06 mg/g). Heterometallic frameworks provided distinct pore sizes and binding sites toward iodine molecules and realize crystallographic visualization concerning sequential confinement of iodine molecules. This work not only sets up a bridge between molecular rings and infinite porous networks but also reveals molecular details for the underlying host-guest binding interactions at crystallographic resolution. PMID:34314080 | DOI:10.1002/anie.202107227 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Automated alternate cover test for 'HINTS' assessment: a validation study

xlomafota13 shared this article with you from Inoreader Automated alternate cover test for 'HINTS' assessment: a validation study Via http://link.springer.com/journal/405,European archives of oto-rhino-laryngology,The European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino Eur Arch Otorhinolaryngol. 2021 Jul 23. doi: 10.1007/s00405-021-06998-w. Online ahead of print. ABSTRACT OBJECTIVE: The alternate cover test (ACT) in patients with acute vestibular syndrome is part of the 'HINTS' battery test. Although quantitative, the ACT is highly dependent on the examiner's experience and could theoretically vary greatly between examiners. In this study, we sought to validate an automated video-oculography (VOG) system based on eye tracking and dedicated glasses. METHODS: We artificially induced a vertical strabismus to simulate a skew deviation on ten healthy subjects, aged from 26 to 66, using different press-on Fresnel prisms on one eye while recording eye position with VOG of the contralateral eye. We then compared the system's performance to that of a blinded trained orthoptist using conventional, semi-quantitative method of skew measurement known as the alternate prism cover test (APCT) as a gold standa rd. RESULTS: We found a significant correlation between the reference APCT and the Skew VOG (Pearson's R2 = 0.606, p < 0.05). There was a good agreement between the two tests (intraclass correlation coefficient 0.852, 95 CI 0.728-0.917, p < 0.001). The overall accuracy of the VOG was estimated at 80.53% with an error rate of 19.46%. There was no significant difference in VOG skew estimations compared with the gold standard except for very small skews. CONCLUSIONS: VOG offers an objective and quantitative skew measurement and proved to be accurate in measuring vertical eye misalignment compared to the ACT with prisms. Precision was moderate, which mandates a sufficient number of tests per subject. PMID:34302212 | DOI:10.1007/s00405-021-06998-w View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

A comprehensive study of right and left inferior phrenic artery variations in 1000 patients with multidetector computed tomography angiography: an important study for HCC

xlomafota13 shared this article with you from Inoreader A comprehensive study of right and left inferior phrenic artery variations in 1000 patients with multidetector computed tomography angiography: an important study for HCC Via radiol anat Surg Radiol Anat. 2021 Jul 23. doi: 10.1007/s00276-021-02805-7. Online ahead of print. ABSTRACT PURPOSE: To investigate the anatomic variations in the origins of the right and left inferior phrenic arteries (IPAs) using multidetector computed tomography and to classify their combined variations. METHODS: This retrospective study included patients undergoing abdominal aorta angiography between January 2015 and October 2019. The RIPA and LIPA origins were evaluated both separately and combined on three-dimensional images. The variant patterns of the IPAs were determined and classified. The numerical evaluation of the data was performed with SPSS 21. RESULTS: In total, 1000 patients (478 women, 522 men) were evaluated. The IPAs originated from a common trunk or a common root in 360 (36.00%) patients, while the IPAs originated independently without a common trunk in 609 (60.90%) patients. The most common combined variant detected in the present study was IPAs originating as a common trunk from the coeliac trunk in 197 (19.70%) patients; 14 (1.40%) patients had no inferior phrenic artery (IPA), and 17 (1.70%) patients had only one IPA. CONCLUSION: Fifty-two different types of variations in the combined origin of the inferior phrenic arteries were described in this study for the first time in the literature. Awareness of the anatomic variations in the IPAs, which is critical for hepatocellular carcinoma origins, may benefit various clinical procedures, such as transcatheter arterial chemoembolization, organ transplantations, laparoscopic surgical procedures, and radiological procedures. PMID:34302198 | DOI:10.1007/s00276-021-02805-7 View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Suicide Incidence and Risk Among Patients With Head and Neck Cancer in Rural vs Urban Areas

xlomafota13 shared this article with you from Inoreader Suicide Incidence and Risk Among Patients With Head and Neck Cancer in Rural vs Urban Areas Via JAMA Otolaryngology–Head & Neck Surgery Online First This cross-sectional study uses data from the Surveillance, Ep idemiology, and End Results database to evaluate whether the risk of suicide among patients with head and neck cancer differs by rural vs urban or metropolitan residence status. View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.

Oncocytic Salivary Gland Tumours: Cytological Features and Diagnostic Pitfalls

xlomafota13 shared this article with you from Inoreader Oncocytic Salivary Gland Tumours: Cytological Features and Diagnostic Pitfalls Via Otolaryngology Indian Abstract Oncocytes are epithelial cells having abundant eosinophilic cytoplasm. The presence of oncocytes in salivary glands pose a diagnostic challenge since they can be present in lesions ranging from non-neoplastic, benign to malignant. FNAC is a simple procedure which can aid in the pre-operative diagnosis of these lesions. This study is an eight year retrospective study in which salivary gland aspiration cytology cases having oncocytic cells and with available corresponding histopathology were included. These slides were reviewed for features like cellularity, presence of oncocytic cells, glandular elements, squamoid cells, nuclear atypia, mitosis, lymphoid tissue, necrosis. Twenty cases were included in the study. The mean age of presentation was 60 years showing male preponderance with parotid gland being the most common site of involvement. Concordant diagnosis on cytology and histopathology was seen in 1 6 cases and discordance was seen in 4 cases. All the discordant cases were reported as benign on cytology but on histopathology they were labelled as acinic cell carcinoma, squamous cell carcinoma, mucoepidermoid carcinoma and an intraparotid lymph node respectively. Review of discordant cases showed subtle findings like ill-formed acini, cytoplasmic vacuolation, goblet cells and dysplastic foci raising suspicion of a different diagnosis. The potential areas of pitfall and cause of discrepancy have been discussed in this study. It is crucial to be aware of the spectrum of lesions in which oncocytes are seen, to enable an accurate diagnosis on cytology. Careful evaluation of smears for subtle clues can minimize errors. View on the web Inoreader. Take back control of your news feed. Follow us on Twitter and Facebook.