Πέμπτη 10 Νοεμβρίου 2022

The participation of fibroblast growth factor‐1 and interleukin‐10 in connective tissue repair following subcutaneous implantation of bioceramic materials in rats

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Abstract

Aim

To evaluate whether the bioceramic materials Bio-C Pulpo (Bio-C, Angelus, Londrina, Brazil) and MTA Repair HP (MTA-HP, Angelus, Londrina, Brazil) induce fibroblast proliferation and release of interleukin-10 (IL-10), an anti-inflammatory cytokine, stimulating connective tissue remodelling. The tissue response of Bio-C and MTA-HP was compared with the White MTA (WMTA; Angelus, Londrina, Brazil) since studies have demonstrated that WMTA induces tissue repair.

Methodology

Bio-C, MTA-HP, and WMTA were inserted into polyethylene tubes and implanted in the subcutaneous tissue of Holtzman rats for 7, 15, 30 and 60 days. As a control group (CG), empty tubes were implanted subcutaneously. The number of fibroblasts (FB), Ki-67-, fibroblast growth factor-1- (FGF-1) and IL-10-immunolabelled cells, and collagen content in the capsules was obtained. The data were subjected to two-way ANOVA followed by Tukey's test (P ≤ 0.05).

Results

At 7 days, significant differences in the number of FB were not detected among Bio-C, MTA-HP and WMTA groups (P ˃ 0.05). The capsules of all groups exhibited a significant increase in the number of FB and content of collagen over time. From 7 to 60 days, a significant reduction in the number of FGF-1- and Ki-67-immunolabelled cells was seen in the capsules of all specimens. In all periods, no significant difference in the number of FGF-1-immunolabelled cells was detected between Bio-C and CG specimens. At 60 days, significant differences in the immunoexpression of FGF-1 were not observed among the groups. At 7 and 15 days, the highest immunoexpression for Ki-67 was present in Bio-C specimens while, after 30 and 60 days, no significant difference was observed among the bioceramic materials. At 7 days, few IL-10 immunolabelled cells were present in the capsules of all specimens whereas, at 60 days, a significant increase in the IL-10-immunostaining was present in all groups. At 60 days, the Bio-C, MTA-HP and WMTA groups showed a greater number of IL-10-immunolabelled cells than in the CG specimens (P < 0.0001).

Conclusions

Bio-C, MTA-HP and WMTA stimulate fibroblast proliferation, leading to formation of collagen-rich capsules. FGF-1 and IL-10 may mediate the remodelling of capsules around Bio-C, MTA-HP and WMTA bioceramic materials.

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Global survival trends for brain tumors, by histology: analysis

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Abstract
Background
Survival is a key metric of the effectiveness of a health system in managing cancer. We set out to provide a comprehensive examination of worldwide variation and trends in survival from brain tumors in adults, by histology.
Methods
We analyzed individual data for adults (15–99 years) diagnosed with a brain tumor (ICD-O-3 topography code C71) during 2000–2014, regardless of tumor behavior. Data underwent a 3-phase quality control as part of CONCORD-3. We estimated net survival for 11 histology groups, using the unbiased nonparametric Pohar Perme estimator.
Results
The study included 556,237 adults. In 2010–2014, the global range in age-standardized 5-year net survival for the most common sub-types was broad: in the range 20%–38% for diffuse and anaplastic astrocytoma, from 4% to 17% for glioblastoma, and between 32% and 69% for oligodendroglioma. For patients with glioblastoma, the largest gains in s urvival occurred between 2000–2004 and 2005–2009. These improvements were more noticeable among adults diagnosed aged 40–70 years than among younger adults.
Conclusions
To the best of our knowledge, this study provides the largest account to date of global trends in population-based survival for brain tumors by histology in adults. We have highlighted remarkable gains in 5-year survival from glioblastoma since 2005, providing large-scale empirical evidence on the uptake of chemoradiation at population level. Worldwide, survival improvements have been extensive, but some countries still lag behind. Our findings may help clinicians involved in national and international tumor pathway boards to promote initiatives aimed at more extensive implementation of clinical guidelines.
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Posttraumatic Lingual Artery Pseudoaneurysm and Synchronous Multiple Pneumatosis in a Child

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This case report describes a lingual artery pseudoaneurysm in a child after a low-energy, blunt, neck trauma accompanied by subcutaneous emphysema, pneumothorax, pneumomediastinum, pneumopericardium, pneumoperitoneum, and pneumorrhachis.
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Assessment of Fat Fractions in the Tongue, Soft Palate, Pharyngeal Wall, and Parapharyngeal Fat Pad by the GOOSE and DIXON Methods

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imageObjective The 2-point DIXON method is widely used to assess fat fractions (FFs) in magnetic resonance images (MRIs) of the tongue, pharyngeal wall, and surrounding tissues in patients with obstructive sleep apnea (OSA). However, the method is semiquantitative and is susceptible to B0 field inhomogeneities and R2* confounding factors. Using the method, although several studies have shown that patients with OSA have increased fat deposition around the pharyngeal cavity, conflicting findings was also reported in 1 study. This discrepancy necessitates that we examine the FF estimation method used in the earlier studies and seek a more accurate method to measure FFs. Materials and Methods We examined the advantages of using the GOOSE (globally optimal surface estimation) method to replace the 2-point DIXON method for quantifying fat in the tongue and surrounding tissues on MRIs. We first used phantoms with known FFs (true FFs) to validate the GOOSE method and examine the errors in the DIXON method. Then, we compared the 2 methods in the tongue, soft palate, pharyngeal wall, and parapharyngeal fat pad of 63 healthy participants to further assess the errors caused by the DIXON method. Six participants were excluded from the comparison of the tongue FFs because of technical failures. Paired Student t tests were performed on FFs to detect significant differences between the 2 methods. All measures were obtained using 3 T Siemens MRI scanners. Results In the phantoms, the FFs measured by GOOSE agreed with the true FF, with only a 1.2% mean absolute error. However, the same measure by DIXON had a 10.5% mean absolute error. The FFs obtained by DIXON were significantly lower than those obtained by GOOSE (P
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Deep Learning-Enhanced Parallel Imaging and Simultaneous Multislice Acceleration Reconstruction in Knee MRI

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imageObjectives This study aimed to examine various combinations of parallel imaging (PI) and simultaneous multislice (SMS) acceleration imaging using deep learning (DL)-enhanced and conventional reconstruction. The study also aimed at comparing the diagnostic performance of the various combinations in internal knee derangement and provided a quantitative evaluation of image sharpness and noise using edge rise distance (ERD) and noise power (NP), respectively. Materials and Methods The data from adult patients who underwent knee magnetic resonance imaging using various DL-enhanced acquisitions between June 2021 and January 2022 were retrospectively analyzed. The participants underwent conventional 2-fold PI and DL protocols with 4- to 8-fold acceleration imaging (P2S2 [2-fold PI with 2-fold SMS], P3S2, and P4S2). Three readers evaluated the internal knee derangement and the overall image quality. The diagnostic performance was calculated using consensus reading as a standard reference, and we conducted comparative evaluations. We calculated the ERD and NP for quantitative evaluations of image sharpness and noise, respectively. Interreader and intermethod agreements were calculated using Fleiss κ. Results A total of 33 patients (mean age, 49 ± 19 years; 20 women) were included in this study. The diagnostic performance for internal knee derangement and the overall image quality were similar among the evaluated protocols. The NP values were significantly lower using the DL protocols than with conventional imaging (P 0.12). Interreader and intermethod agreements were moderate-to-excellent (κ = 0.574–0.838) and good-to-excellent (κ = 0.755–1.000), respectively. In addition, the mean acquisition time was reduced by 47% when using DL with P2S2, by 62% with P3S2, and by 71% with P4S2, compared with conventional P2 imaging (2 minutes and 55 seconds). Conclusions The combined use of DL-enhanced 8-fold acceleration imaging (4-fold PI with 2-fold SMS) showed comparable performance with conventional 2-fold PI for the evaluation of internal knee derangement, with a 71% reduction in acquisition time.
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Τετάρτη 9 Νοεμβρίου 2022

Maternal Antibody Response and Transplacental Transfer Following SARS-CoV-2 Infection or Vaccination in Pregnancy

alexandrossfakianakis shared this article with you from Inoreader

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Abstract
Background
Pregnant persons are at increased risk of severe COVID-19 and adverse obstetric outcomes. Understanding maternal antibody response, duration, and transplacental transfer after SARS-CoV-2 infection and COVID-19 vaccination is important to inform public health recommendations.
Methods
This prospective observational cohort study included 351 pregnant people who had SARS-CoV-2 infection or COVID-19 vaccination during pregnancy. IgG and IgM to SAR S-CoV-2 S1 receptor binding domain were measured in maternal and cord blood. Antibody levels and transplacental transfer ratios were compared across 1) disease severity for those with SARS-CoV-2 infection and 2) infection versus vaccination.
Results
There were 252 individuals with SARS-CoV-2 infection and 99 who received COVID-19 vaccination during pregnancy. Birthing people with more severe SARS-CoV-2 infection had higher maternal and cord blood IgG levels (p = 0.0001, p = 0.0001). Median IgG transfer ratio was 0.87-1.2. Maternal and cord blood IgG were higher after vaccination than infection (p = 0.001, p = 0.001). Transfer ratio was higher after 90 days in the vaccinated group (p < 0.001). Modeling showed higher amplitude and half-life of maternal IgG following vaccination (p < 0.0001). There were no significant differences by fetal sex.
Conclusions
COVID-19 vaccination in pregnancy leads to higher and longer lasting maternal IgG le vels, higher cord blood IgG, and higher transfer ratio after 90 days compared to SARS-CoV-2 infection. Greater infection severity leads to higher maternal and cord blood antibodies. Maternal IgG decreases over time following both vaccination and infection, reinforcing the importance of vaccination, even after infection, and vaccine boosters for pregnant patients.
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A 53‐year‐old woman with a rapidly progressive, non‐enhancing left frontotemporal lesion

alexandrossfakianakis shared this article with you from Inoreader

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Brain Pathology
Brain Pathology
CASE IMAGE
Open Access
A 53-year-old woman with a rapidly progressive, non-enhancing left frontotemporal lesion
Michael L. Miller,Daniel W. Griepp,Yu Sun,Sean Tamir,Rebecca Straus Farber,Marc L. Otten,Osama Al-Dalahmah
First published: 08 November 2022 https://doi.org/10.1111/bpa.13125
Michael L. Miller and Daniel W. Griepp contributed equally to this study.
SECTIONSPDFPDFTOOLS SHARE
Abstract
Fifty-three-year-old woman presented with chronic, episodic headache.

Description unavailable
1 CLINICAL HISTORY AND IMAGING
A 53-year-old woman presented with chronic, episodic headache. The patient's headache was first noted several years prior to presentation and would occur for weeks to months, then remit for several weeks to months. More recently, the severity of the headache worsened which prompted a referral to neurology. The patient's past medical history included bilateral knee arthralgia and swelling about 6 years prior to presentation, which since resolved. While the symptoms raised the possibility of Lyme disease or rheumatoid arthritis (RA), neither diagnosis was confirmed. Given the patient's intractable headache, magnetic resonance imaging (MRI) was performed which revealed a non-enhancing left frontal white matter lesion (Figure 1A). On evaluation by neurosurgery, observation was initially recommended with the possibility of open biopsy. At follow-up, despite resolution of the patient's presenting symptom of headache, the patient began to show signs of subjective neurocognitive impairment s, including word-finding difficulty, poor performance playing chess, and fear of driving. Repeat imaging 3 months since presentation revealed progression of the lesion (Figure 1B) with expansion into the temporal lobe (not shown). Given the relatively rapid radiographic progression, the lesion was biopsied with concern for a neoplastic process (Box 1).

Details are in the caption following the image
FIGURE 1
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PowerPoint
Brain magnetic resonance imaging. Axial plane FLAIR sequences at initial presentation (A) and at follow up 3–4 months later (B) revealed relatively rapid progression of the left frontal lobe.
BOX 1. Slide scan
Access the whole slide scan at https://isn-slidearchive.org/?col=ISN&fol=Archive&file=BPA-21-12-302.svs

2 FINDINGS
Hematoxylin and eosin (H&E)-stained sections revealed gliotic brain. Mixed chronic- and focally acute-appearing inflammatory infiltrates composed primarily of histiocytes and multinucleated giant cells, with scant lymphocytes and occasional eosinophils, involved most cortical vessels (Figure 2A–C). Transmural disruption and focal necrosis were also identified (Figure 2A), as were scattered well-formed granulomas. Cortical and leptomeningeal vessels appeared thickened and occasionally produced a double-barreled appearance. Focally exuberant perivascular hemosiderin deposits were identified. Within the vessel walls, deposition of amorphous, congophilic material was identified that appeared green-red birefringent under polarized light (Figure 2D,E). Immunohistochemistry with beta-amyloid revealed intense circumferential staining in the leptomeningeal and cortical blood vessels (Figure 2F).

Details are in the caption following the image
FIGURE 2
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PowerPoint
Histology of brain biopsy. Gliotic brain parenchyma with focal fibrinous exudate of vessels (A) and angiocentric inflammation composed of monocytes, lymphocytes, and prominent giant cells (B). (C) Giant cells were highlighted with CD68 immunostain. (D) Congophilic material within vascular walls, which appeared apple-green when viewed under polarized light (inset). (E and F) Intense, circumferential accumulation of beta-amyloid around intraparenchymal vessel, including vessels with prominent transmural inflammation (for all, scale bar = 50 μm)
3 FINAL DIAGNOSIS
Amyloid beta-related angiitis (ABRA).

4 DISCUSSION
A defining feature of ABRAis the presence of cerebral amyloid angiopathy (CAA) in association with vasculitis [1]. Given prognostic and predictive differences of ABRA when compared to CNS vasculitis in the absence of CAA and CAA in the absence of vasculitis, accurate distinction is clinically meaningful [2]. For instance, in contrast to ABRA, primary CNS vasculitis without CAA generally results in a less favorable outcome [2]. While CAA is primarily the result of imbalanced amyloid production and clearance, ABRA is thought to occur when beta-amyloid vascular deposits are recognized as foreign antigens [1]. Although ABRA generally occurs earlier in life compared to CAA, most studies describe presentation of ABRA in the sixth or seventh decades of life [1, 3]. Predisposing factors to the development of ABRA are not clearly defined, although it is associated with preexisting autoimmune processes, prior radiation treatment, and ApoE4 genotype. It is notable that the present patient was r elatively young and had a possible history of rheumatoid arthritis.

The inflammatory process of ABRA results in the destruction of vessels. Previously reported cases of ABRA were typically characterized by severe leptomeningeal and parenchymal amyloid angiopathy, along with chronic inflammation within the leptomeninges and in and around vessel walls [3]. Granulomatous inflammatory infiltrates and large multinucleated macrophages are also characteristic findings [1, 3]. Extensive fibrinoid necrosis of vessels may be identified [3]. Features characteristic of CAA may also be observed, such as hemosiderin-laden macrophages suggestive of prior hemorrhage [3]. Many of these histopathological features were appreciated in the present case.

Diagnosis of ABRA is difficult given the generally non-specific clinical presentation and broad radiographic diagnosis. While the signs of CAA are more likely to manifest as spontaneous lobar intracerebral hematoma or progressive dementia, the presenting signs of ABRA may include seizure, mental status change, headache, or newly recognized focal neurological deficits. Radiographic changes are also nonspecific, but typically include asymmetric subcortical white matter lesions, evidence of microhemorrhages, and leptomeningeal enhancement. The present patient's clinical presentation was non-specific and consisted of headache that progressed to word-finding difficulty. The radiographic presentation showed a non-enhancing white matter lesion as well as several punctate areas of susceptibility outside of the lesion. Thus overall, prior to biopsy, there was a concern for malignancy although a diverse differential including inflammatory processes was considered.

Definitive diagnosis of ABRA is rendered through microscopic examination of a targeted brain biopsy. The most successful treatments reported include immunosuppression with prednisone and/or cyclophosphamide, although other immunosuppressive agents have been successful [1, 3]. With treatment, approximately three quarters of patients recover to some degree while approximately one quarter develops relapses [1]. While in our case, the patient's young age and the rapid radiologic progression of the lesion prompted a biopsy—which was diagnostic—it is important to remember that when ABRA/CAA is clinically suspected, the diagnosis can be made without surgery when imaging is supportive.

AUTHOR CONTRIBUTIONS
Michael L. Miller, Daniel W. Griepp and Osama Al-Dalahmah wrote the original draft. Yu Sun, Sean Tamir, Rebecca Straus Farber and Marc L. Otten reviewed and edited the draft.

CONFLICT OF INTEREST
The authors declare no conflict of interest.

ETHICS STATEMENT
All data related to this case are deidentified.

Open Research
REFERENCES

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A 53-year-old woman with a rapidly progressive, non-enhancing left frontotemporal lesion

Fifty-three-year-old woman presented with chronic, episodic headache.


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