1.Borderzone Infarcts and Recurrent Cerebrovascular Events in Symptomatic Intracranial Arterial Stenosis: A Systematic Review and Meta-Analysis
Saurav DAS ; Liqi SHU ; Rebecca J. MORGAN ; Asghar SHAH ; Fayez H. FAYAD ; Eric D. GOLDSTEIN ; Dalia CHAHIEN ; Benton MAGLINGER ; Satish Kumar BOKKA ; Cory OWENS ; Mehdi ABBASI ; Alexandra KVERNLAND ; James E. SIEGLER ; Brian Mac GRORY ; Thanh N. NGUYEN ; Karen FURIE ; Pooja KHATRI ; Eva MISTRY ; Shyam PRABHAKARAN ; David S. LIEBESKIND ; Jose G. ROMANO ; Adam de HAVENON ; Lina PALAIODIMOU ; Georgios TSIVGOULIS ; Shadi YAGHI
Journal of Stroke 2023;25(2):223-232
Background:
and Purpose Intracranial arterial stenosis (ICAS)-related stroke occurs due to three primary mechanisms with distinct infarct patterns: (1) borderzone infarcts (BZI) due to impaired distal perfusion, (2) territorial infarcts due to distal plaque/thrombus embolization, and (3) plaque progression occluding perforators. The objective of the systematic review is to determine whether BZI secondary to ICAS is associated with a higher risk of recurrent stroke or neurological deterioration.
Methods:
As part of this registered systematic review (CRD42021265230), a comprehensive search was performed to identify relevant papers and conference abstracts (with ≥20 patients) reporting initial infarct patterns and recurrence rates in patients with symptomatic ICAS. Subgroup analyses were performed for studies including any BZI versus isolated BZI and those excluding posterior circulation stroke. The study outcome included neurological deterioration or recurrent stroke during follow-up. For all outcome events, corresponding risk ratios (RRs) and 95% confidence intervals (95% CI) were calculated.
Results:
A literature search yielded 4,478 records with 32 selected during the title/abstract triage for full text; 11 met inclusion criteria and 8 studies were included in the analysis (n=1,219 patients; 341 with BZI). The meta-analysis demonstrated that the RR of outcome in the BZI group compared to the no BZI group was 2.10 (95% CI 1.52–2.90). Limiting the analysis to studies including any BZI, the RR was 2.10 (95% CI 1.38–3.18). For isolated BZI, RR was 2.59 (95% CI 1.24–5.41). RR was 2.96 (95% CI 1.71–5.12) for studies only including anterior circulation stroke patients.
Conclusion
This systematic review and meta-analysis suggests that the presence of BZI secondary to ICAS may be an imaging biomarker that predicts neurological deterioration and/or stroke recurrence.
3.Juvenile Polyps in Bangladeshi Children and Their Association with Fecal Calprotectin as a Biomarker
Subarna RANI DAS ; A S M Bazlul KARIM ; Md RUKONUZZAMAN ; Md Wahiduzzaman MAZUMDER ; Rubaiyat ALAM ; Md BENZAMIN ; Parisa MARJAN ; Mst. Naznin SARKER ; Hazera AKTHER ; Mohuya MONDAL
Pediatric Gastroenterology, Hepatology & Nutrition 2022;25(1):52-60
Purpose:
Colonoscopy is considered the most reliable method for the diagnosis of juvenile polyps. However, colonoscopic screening is an invasive and expensive procedure. Fecal calprotectin (FCP), a marker of intestinal inflammation, has been shown to be elevated in patients with polyps. Therefore, this study aimed to evaluate FCP as a screening biomarker for the diagnosis of juvenile polyps.
Methods:
This cross-sectional, observational study was conducted at the Pediatric Gastroenterology and Nutrition Department, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh. For children with polyps, colonoscopic polypectomy and histopathology were performed. FCP levels were analyzed before and 4 weeks after polypectomy in all patients. Information was recorded in a datasheet and analyzed using the computer-based program SPSS.
Results:
The age of the children was between 2.5 and 12 years. Approximately 93% of the polyps were found in the rectosigmoid region. Children with juvenile polyps had elevated levels of FCP before polypectomy that subsequently normalized after polypectomy. The mean FCP levels before and after polypectomy were 277±247 µg/g (range, 80–1,000 µg/g) and 48.57±38.23 µg/g (range, 29–140 µg/g) (p<0.001), respectively. The FCP levels were significantly higher in patients with multiple polyps than in those with single polyps. Moreover, mean FCP levels in patients with single and multiple polyps were 207.6±172.4 µg/ g and 515.4±320.5 µg/g (p<0.001), respectively.
Conclusion
Colonic juvenile polyps were found to be associated with elevated levels of FCP that normalized after polypectomy. Therefore, FCP may be recommended as a noninvasive screening biomarker for diagnosis of colonic juvenile polyps.
4.Deconstructive repair of a traumatic vertebrovertebral arteriovenous fistula via a contralateral endovascular approach
Sathiji K. NAGESHWARAN ; Francis DENG ; Robert W. REGENHARDT ; Alvin S. DAS ; Naif M. ALOTAIBI ; Aman B. PATEL ; Christopher J. STAPLETON
Journal of Cerebrovascular and Endovascular Neurosurgery 2022;24(3):291-296
Vertebrovertebral arteriovenous fistulas (VVAVFs) are rare entities that lack consensus guidelines for their management. Our case describes the successful treatment of a traumatic VVAVF via a contralateral deconstructive endovascular approach. A 64-year-old female presented following a traumatic fall. Computed tomography angiogram highlighted a 2 cm pseudoaneurysm of the right vertebral artery (VA) with epidural contrast enhancement and a hematoma with flow voids within the epidural space. Digital subtraction angiography showed a VVAVF at C2-3 with retrograde filling of the distal right VA. Having undergone several unsuccessful passes of the proximal dissection flap in the right VA, the patient underwent a contralateral deconstructive approach with correction of the VVAVF without complication. The remaining feeding branches had occluded after 1 week. The patient made a complete recovery without neurological sequelae at 3-month follow-up.
5.The phytochemical, biological, and medicinal attributes of phytoecdysteroids: An updated review.
Niranjan DAS ; Siddhartha Kumar MISHRA ; Anusha BISHAYEE ; Eunüs S ALI ; Anupam BISHAYEE
Acta Pharmaceutica Sinica B 2021;11(7):1740-1766
The phytoecdysteroids (PEs) comprise a large group of biologically-active plant steroids, which have structures similar to those of insect-molting hormones. PEs are distributed in plants as secondary metabolites that offer protection against phytophagus (plant-eating) insects. When insects consume the plants containing these chemicals, they promptly molt and undergo metabolic destruction; the insects eventually die. Chemically, ecdysteroids are a group of polyhydroxylated ketosteroids that are structurally similar to androgens. The carbon skeleton of ecdysteroids is termed as cyclopentanoperhydro-phenanthrene with a
6.Injuries in survivors of elephant attack: Report of three cases.
Pradeep Kumar SINGH ; S Manwar ALI ; Mahesh SETHI ; Das Birendra MANOHAR
Chinese Journal of Traumatology 2021;24(6):394-396
Human-elephant conflict (HEC) in India is becoming a growing health problem causing many fatalities every year. Elephants produce injuries by trampling, stomping, squeezing, tossing in the air, or crushing/targeting the head and chest commonly. The adult elephants are most aggressive in their mating season, leading to maximum incidences of HECs in this period. These attacks are mostly unprovoked, though most HECs are provoked. In this case series, the authors described the injuries sustained by three survivors in a short span of one month due to the sudden and unprovoked elephant attack. All the injuries were mild to moderate in severity and involved the chest in common. Timely rescue and prompt initiation of treatment were pivotal in their survival. The authors also want to create awareness about the mating season of elephants to minimize these unfortunate events in the future.
Animals
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Elephants
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Humans
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India
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Seasons
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Survivors
7.Results of ala carte Posteromedial Soft Tissue Release in Idiopathic Clubfoot
Barik S ; Das L ; Yadav AK ; Arora SS ; Singh V
Malaysian Orthopaedic Journal 2021;15(No.2):89-95
Introduction: The aim of this study is to assess the
outcomes of ala carte posteromedial release in children over
two years of age who were not responding to the Ponseti
method of treatment of idiopathic clubfoot.
Materials and Methods: A retrospective observational
study from September 2013 to August 2015 was conducted
at a tertiary level medical teaching institution. The clubfeet
were classified according to the Harold and Walker
classification. Radiographic parameters assessed were the
talocalcaneal angle (AP, lateral), talus-first metatarsal angle
(AP, lateral) and calcaneal-fifth metatarsal angle. The scar
and the functional score, according to Laaveg and Ponseti,
were evaluated as outcome measures at the final follow-up.
Results: Twenty-four children with a mean age of 43.7 ±
24.7 months were enrolled in the study. There was a total of
36 clubfeet: 21 (65.6%) with a poor functional outcome; 12
(37.4%) with excellent to good scar in both horizontal and
vertical components. There was a statistical significance
between the pre-operative and post-operative radiological
parameters (p<0.05). None of the patients presented with any
limitation of activities of daily living despite the poor
functional outcome in many of the children. There was no
significant association between the qualities of scar
(horizontal, vertical) and the functional outcome with age at
presentation, pre-operative Harold and Walker classification
and pre-operative radiographic angles.
Conclusion: Surgical intervention in terms of ala carte
posteromedial soft tissue release could not produce a good
outcome over four years in CTEV. The threshold for surgery
in CTEV should be high, given the poor results.
8.Mutation analysis and characterisation of F9 gene in haemophilia- B population of India
Sujayendra KULKARNI ; Rajat HEGDE ; Smita HEGDE ; Suyamindra S. KULKARNI ; Suresh HANAGVADI ; Kusal K. DAS ; Sanjeev KOLAGI ; Pramod B. GAI ; Rudragouda BULAGOUDA
Blood Research 2021;56(4):252-258
Background:
Hemophilia B (HB) is an X-linked bleeding disorder resulting from coagulation factor IX defects. Over 3,000 pathogenic, HB-associated mutations in the F9 gene have been identified. We aimed to investigate the role of F9 variants in 150 HB patients using sequencing technology.
Methods:
F9 gene sequences were amplified from peripheral blood-derived DNA and sequenced on an Applied Biosystems (ABI) 3500 Sanger sequencing platform. Functional and structural predictions of mutant FIX were analyzed.
Results:
Among 150 HB patients, 102 (68%), 30 (20%), and 18 (12%) suffered from severe, moderate, and mild HB, respectively. Genetic analysis identified 16 mutations, including 3 novel mutations. Nine mutations (7 missense and 2 stop-gain) were found to be pathogenic.Only 3 mutations (c.127C>T, c.470G>A, and c.1070G>A) were associated with different severities. While 2 mutations were associated with mild HB cases (c.304C>T and c.580A>G), 2 (c.195G>A and c.1385A>G) and 3 mutations (c.223C>T, c.1187G>A, and c.1232G>A) resulted in moderate and severe disease, respectively. Additionally, 1 mutation each was associated with mild-moderate (c.*1110A>G) and mild-severe HB disease (c.197A>T), 4 mutations were associated with moderate-severe HB cases (c.314A>G, c.198A>T, c.676C>T, and c.1094C>A). FIX concentrations were lower in the mutated group (5.5±2.5% vs. 8.0±2.5%). Novel p.E66D and p.S365 mutations were predicted to be pathogenic based on changes in FIX structure and function.
Conclusion
Novel single nucleotide polymorphisms (SNPs) largely contributed to the pathogenesis of HB. Our study strongly suggests that population-based genetic screening will be particularly helpful to identify risk prediction and carrier detection tools for Indian HB patients.
9.Genetic analysis of the postsynaptic transmembrane X-linked neuroligin 3 gene in autism
Rajat HEGDE ; Smita HEGDE ; Suyamindra S. KULKARNI ; Aditya PANDURANGI ; Pramod B. GAI ; Kusal K. DAS
Genomics & Informatics 2021;19(4):e44-
Autism is a complex neurodevelopmental disorder, the prevalence of which has increased drastically in India in recent years. Neuroligin is a type I transmembrane protein that plays a crucial role in synaptogenesis. Alterations in synaptic genes are most commonly implicated in autism and other cognitive disorders. The present study investigated the neuroligin 3 gene in the Indian autistic population by sequencing and in silico pathogenicity prediction of molecular changes. In total, 108 clinically described individuals with autism were included from the North Karnataka region of India, along with 150 age-, sex-, and ethnicity-matched healthy controls. Genomic DNA was extracted from peripheral blood, and exonic regions were sequenced. The functional and structural effects of variants of the neuroligin 3 protein were predicted. One coding sequence variant (a missense variant) and four non-coding variants (two 5'-untranslated region [UTR] variants and two 3'-UTR variants) were recorded. The novel missense variant was found in 25% of the autistic population. The C/C genotype of c.551T>C was significantly more common in autistic children than in controls (p = 0.001), and a significantly increased risk of autism (24.7-fold) was associated with this genotype (p = 0.001). The missense variant showed pathogenic effects and high evolutionary conservation over the functions of the neuroligin 3 protein. In the present study, we reported a novel missense variant, V184A, which causes abnormal neuroligin 3 and was found with high frequency in the Indian autistic population. Therefore, neuroligin is a candidate gene for future molecular investigations and functional analysis in the Indian autistic population.
10.Preoperative Therapy Regimen Influences the Incidence and Implication of Nodal Downstaging in Patients with Gastric Cancer
Alexander P. STARK ; Mariela M. BLUM ; Yi-Ju CHIANG ; Prajnan DAS ; Bruce D. MINSKY ; Jeannelyn S. ESTRELLA ; Jaffer A. AJANI ; Brian D. BADGWELL ; Paul MANSFIELD ; Naruhiko IKOMA
Journal of Gastric Cancer 2020;20(3):313-327
Purpose:
Nodal downstaging after preoperative therapy for gastric cancer has been shown to impart excellent prognosis, but this has not been validated in a national cohort. The role of neoadjuvant chemoradiation (NACR) in nodal downstaging remains unclear when compared with that of neoadjuvant chemotherapy alone (NAC). Furthermore, it is unknown whether the prognostic implications of nodal downstaging differ by preoperative regimen.
Materials and Methods:
Using the National Cancer Database, overall survival (OS) duration was compared among natural N0 (cN0/ypN0), downstaged N0 (cN+/ypN0), and nodepositive (ypN+) gastric cancer patients treated with NACR or NAC. Factors associated with nodal downstaging were examined in a propensity score-matched cohort of cN+ patients, matched 1:1 by receipt of NACR or NAC.
Results:
Of 7,426 patients (natural N0 [n=1,858, 25.4%], downstaged N0 [n=1,813, 24.4%], node-positive [n=3,755, 50.4%]), 58.2% received NACR, and 41.9% received NAC. The median OS durations of downstaged N0 (5.1 years) and natural N0 (5.6 years) patients were similar to one another and longer than that of node-positive patients (2.1 years) (P<0.001). In the matched cohort of cN+ patients, more recent diagnosis (2010–2015 vs. 2004–2009) (odds ratio [OR], 2.57; P<0.001) and NACR (OR, 2.02; P<0.001) were independently associated with nodal downstaging. The 5-year OS rate of downstaged N0 patients was significantly lower after NACR (46.4%) than after NAC (57.7%) (P=0.003).
Conclusions
Downstaged N0 patients have the same prognosis as natural N0 patients.Nodal downstaging occurred more frequently after NACR; however, the survival benefit of nodal downstaging after NACR may be less than that when such is achieved by NAC.


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