Bronchopulmonary malinosculation: a case report

Pulmonary malinosculation, which include a broad spectrum of disorders that involve abnormalities in one or more of the three main components of the lung, namely, the airways and lung parenchyma, arteries and veins. A case of bronchopulmonary malinosculation was presented due to its rarity

MIGRAINE: A POSSIBLE CAUSE FOR COGNITIVE DECLINE

Objectives:Migraine is the second most common type of headache and seventh most disabling disease worldwide. In general, obesity is often related to headache disorders in several clinical and epidemiologic studies. Obese migraine patients may have an increased attack frequency due to increase in inflammatory response. Cognitive decline is the major pitfall of migraine disorder and there exists a conflicting result between cognition and migraine and the effect of Body Mass Index (BMI) on migraine. So this study is done to find out the relationship between cognition and migraine and its association with BMI.Methods:The study protocol was approved by the ethical committee of SRM Medical College Hospital & Research Centre. The study group consisted of 30 migraine patients and 30 healthy controls aged between 18-40 years of age. Informed consent was obtained from all the participants. Diagnosis of migraine was made using the criteria of 2nd edition of International Headache Classification (IHC). Patients affected by Diabetes mellitus, Hypertension, allergy, inflammation, infection or immune disorders were excluded. Height and weight of the subjects were taken to calculate the BMI. Cognitive tests such as stroop interference trial & trial making tests (A&B) were done to evaluate working memory, mental flexibility and attention.Results:Compared to controls, cases took more time for performing stroop colour card test (106.40 ± 15.87 seconds vs. 132.17±7.027seconds, p<0.001) and trial making pattern B (54.77± 8.169 seconds vs. 56.23 ± 23.457seconds, p=0.004). Among the migraine subjects, obese individuals had an increased frequency of migraine attack per month (Correlation coefficient r=0.797)Conclusion:Cognitive decline in migraine is one of the underestimated problems in migraine. Identifying such problems early can prevent major consequences in day to day activities of migraine patients. Since there is an increased frequency of migraine with increase in BMI, obese migraine subjects can be recommended to do regular exercises.Â

Extended Abstracts: PMCCS3: Third International Workshop on Performability Modeling of Computer and Communication Systems

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Interpreting a Diagnosis of Atypical Squamous Cells of Undetermined Significance in Cervical Cytology and its Association with Human Papillomavirus: A retrospective analysis of 180 cases in Kuwait

Objectives: Atypical squamous cells of undetermined significance (ASC-US) represent a diagnostic challenge during cervical cytology. This study aimed to review and identify high-risk human papillomavirus (HR-HPV) genotypes among previously diagnosed ASC-US cases in Kuwait. Methods: This retrospective study analysed 180 cases diagnosed as ASC-US between June 2017 and May 2018 at the Mubarak Al-Kabeer Hospital, Kuwait. Cervical specimens were assayed to determine the presence of HR-HPV DNA; subsequently, positive cases underwent genotyping and were categorised into three groups (HPV 16, HPV 18/45 and other HR-HPV types). Results: In total, ASC-US was confirmed in only 105 cases (58.3%), with the remaining cases reclassified as negative for intraepithelial lesions or malignancy (NILM; 32.2%) and epithelial cell abnormalities (ECA; 9.4%). Of these, HRHPV DNA was present in 20 ASC-US (19%), one NILM (1.7%) and six ECA (35.3%) cases. There were 62 Kuwaiti and 43 non-Kuwaiti women with confirmed ASC-US; of these, three (4.8%), six (9.7%) and four (6.5%) Kuwaitis and one (2.3%), one (2.3%) and five (11.6%) non-Kuwaitis had HPV 16, both HPV 16 and 18/45 and other HRHPV genotypes, respectively. Of those with HR-HPV DNA, the NILM case had the HPV 18/45 genotype, while the six ECA cases had the HPV 16 (n = 1), both HPV 16 and 18/45 (n = 1) and other HR-HPV (n = 4) genotypes. Conclusion: Overall, HR-HPV DNA was present in 19% of ASC-US cases compared to 1.7% of NILM cases initially misdiagnosed as ASC-US. Re-review of cervical cytology diagnoses may reduce unnecessary costs associated with HR-HPV genotyping. Keywords: Cervical Smears; Atypical Squamous Cells of Undetermined Significance; Human Papilloma Virus; Cytological Techniques; Papanicolaou Test; Kuwait

Directed Nucleosome Sliding during the Formation of the Simian Virus 40 Particle Exposes DNA Sequences Required for Early Transcription

Simian virus 40 (SV40) exists as chromatin throughout its life cycle and undergoes typical epigenetic regulation mediated by changes in nucleosome location and associated histone modifications. In order to investigate the role of epigenetic regulation during the encapsidation of late-stage minichromosomes into virions, we mapped the locations of nucleosomes containing acetylated or methylated lysines in the histone tails of H3 and H4 present in the chromatin from 48-h-postinfection minichromosomes and disrupted virions. In minichromosomes obtained late in infection, nucleosomes were found carrying various histone modifications primarily in the regulatory region, with a major nucleosome located within the enhancer and other nucleosomes at the early and late transcriptional start sites. The nucleosome found in the enhancer would be expected to repress early transcription by blocking access to part of the SP1 binding sites and the left side of the enhancer in late-stage minichromosomes while also allowing late transcription. In chromatin from virions, the principal nucleosome located in the enhancer was shifted ∼70 bases in the late direction from what was found in minichromosomes, and the level of modified histones was increased throughout the genome. The shifting of the enhancer-associated nucleosome to the late side would effectively serve as a switch to relieve the repression of early transcription found in late minichromosomes while likely also repressing late transcription by blocking access to necessary regulatory sequences. This epigenetic switch appeared to occur during the final stage of virion formation.IMPORTANCE For a virus to complete infection, it must produce a new virus particle in which the genome is able to support a new infection. This is particularly important for viruses like simian virus 40 (SV40), which exist as chromatin throughout their life cycles, since chromatin structure plays a major role in the regulation of the life cycle. In order to determine the role of SV40 chromatin structure late in infection, we mapped the locations of nucleosomes and their histone tail modifications in SV40 minichromosomes and in the SV40 chromatin found in virions using chromatin immunoprecipitation-DNA sequencing (ChIP-Seq). We have identified a novel viral transcriptional control mechanism in which a nucleosome found in the regulatory region of the SV40 minichromosome is directed to slide during the formation of the virus particle, exposing transcription factor binding sites required for early transcription that were previously blocked by the presence of the nucleosome

Buffer losses vs. Deadline Violations for ABR Traffic in an ATM Switch: A Computational Approach

The B-ISDN will carry a variety of traffic types: the Variable Bit Rate traffic (VBR), of which compressed video is an example, Continuous Bit Rate traffic (CBR), of which telemetry is an example, Data traffic, and Available Bit Rate traffic (ABR) that represents aggregate data traffic with very limited guarantees on quality. Of these, VBR and CBR have timing constraints and need synchronous bandwidth; data traffic is relatively delay insensitive. In this paper, we consider the VBR, Data and ABR traffic types and obtain the cumulative distribution function (cdf) of the queueing delay experienced by a burst of ABR traffic in the output buffer of an ATM switch. The cdf is used to trade off buffer loss probabilities against deadline violation probabilities through adjusting the buffer size and (delay) deadline values. Large buffers result in low losses but queueing delays can become excessive and cause a high level of deadline violations. Both losses and violations are detrimental and an ..