Ultrasound-Assisted One-Pot Synthesis of Tetrahydropyrimidne Derivatives through Biginelli Condensation: A Catalyst Free Green Chemistry Approach

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A green and efficient ultrasound-assisted one-pot synthesis method for tetrahydro-yrimidine derivatives have been developed through Biginelli condensation. The technique affords up to 99% yield in only 5–20 minutes under mild heating. Each synthesized compounds were fully characterized through spectral techniques viz. IR, 1H NMR, and Mass Spectroscopy.

AB0729 CLINICO-EPIDEMIOLOGICAL PROFILE OF JUVENILE IDIOPATHIC ARTHRITIS (JIA) PATIENTS IN KENYA; DATA FROM THE KENYA PEDIATRIC RHEUMATOLOGY (KAPRI) REGISTRY

Background:

Pediatric rheumatic diseases are chronic illnesses that impart a significant disease burden upon societies (1-3). Determination of the burden and clinical characteristics of these diseases is a critical first step to improving access to care and optimizing use of existing health systems for the well-being of these patients (4-6). A pediatric rheumatology registry is critical in defining the spectrum, clinical characteristics, outcomes and responses of various interventions for pediatric rheumatic diseases. Given that none exists in Kenya, the Kenya Pediatric Rheumatology Registry (KAPRI) registry offers a platform to generate this much needed data in sub-Sahara Africa.

Objectives:

Our objective was to determine the baseline patient characteristics, clinical features and outcomes of the Juvenile Idiopathic Arthritis (JIA) patients assessed at the Aga Khan University Medical College East Africa who were enrolled into the KAPRI registry from inception in March 2019 to December 2020.

Methods:

All patients with an ICD 10 M code diagnosis of Juvenile Arthritis were selected from the KAPRI registry database. Age, gender, laboratory and clinical features at diagnosis and treatment options offered were extracted from the database. A further detailed chart review was undertaken to determine the proportion of patients who achieved remission or minimally active diseases.

Results:

Among the 207 patients enrolled thus far, 16 (7.7%) were diagnosed to have JIA. Majority of the patients were females (75%; n=12) with a mean age of 7 years and 3 months (Range:1 year – 13 years 7 months).

All patients had joint pain and swelling as the initial presenting complaints. Majority of the patients had polyarticular JIA (75%, n=12). The other 4 patients were oligoarticular (n=2) and systemic JIA (n=2). Among the polyarticular JIA patients (n=12), only 3 (25%) were rheumatoid factor (RF) positive and 1 was antinuclear antibody (ANA) positive. The oligoarticular and systemic JIA patients were all negative for antinuclear antibody, rheumatoid factor and cyclic citrullinated peptide antibodies (anti-ccp). Seven patients (43.8%) required biological therapies; tocilizumab (n=2: systemic JIA), adalimumab (n=2: polyarticular JIA), etanercept (n=2: polyarticular JIA) and tofacitnib (n=1: polyarticular JIA). One patient with systemic JIA on tocilizumab developed herpes simplex which was successfully managed with oral acyclovir. All the other patients did not develop any infections, allergic reactions or any other untoward events as adverse outcomes following the use of biological therapies. Five patients have attained remission as illustrated in the Table 1 below. Two patients have been lost to follow up.

Conclusion:

Seronegative polyarticular JIA was the predominant form of JIA observed with a predilection to affect more girls and boys. Over a period of 2 years, remission has been attained among 31.25% of the patients (5 of 16) with use of synthetic disease modifying anti-rheumatic drugs and biological therapies.

References:

[1]Moorthy LN, Peterson MG, Hassett AL, Lehman TJ. Burden of childhood onset arthritis. Pediatr Rheumatol Online J. 2010;8:20.

[2]Minden K, Niewerth M, Listing J, et al. The economic burden of juvenile idiopathic arthritis-results from the German paediatric rheumatologic database. Clin Exp Rheumatol. 2009;27(5):863–9.

[3]Bernatsky S, Duffy C, Malleson P, Feldman DE, St Pierre Y, Clarke AE. Economic impact of juvenile idiopathic arthritis. Arthritis Rheum. 2007;57(1):44–8.

[4]Migowa A, Colmegna I, Hitchon C, Were E, Ng’ang’a E, Ngwiri T, et al. The spectrum of rheumatic in-patient diagnoses at a pediatric hospital in Kenya. Pediatric Rheumatology (2017)

[5]Woolf AD. The bone and joint decade 2000–2010. Ann Rheum Dis. 2000; 59(2):81–2.

[6]Scott C, Webb K. Pediatric rheumatology in sub-Saharan Africa. Rheumatology (Oxford). 2014;53(8):1357–8.

Disclosure of Interests:

None declared

A proposed "Radiological Evaluation Score for Bone Tumors" (REST): An objective system for assessment of a radiograph in patients with suspected bone tumor

BACKGROUND

Although radiographs have been widely used in the evaluation of patients with suspected bone tumors, the lack of an objective radiological assessment method leads to a challenge in reaching correct diagnosis. The study aimed to propose a Radiological Evaluation Score for Bone Tumors (REST) which includes eight radiological factors [characteristics, content, cortical breach, distinctiveness, distribution, periosteal reaction, fracture, and soft tissue swelling] to form a single score along with its validation by multidisciplinary observers.

METHODS

We reviewed the radiographs of 100 patients with a primary bone tumor which were selected at random from the database between January 2017 and January 2019 of a tertiary cancer center. Four reviewers (two orthopedic oncologists and two surgical oncologists) independently assessed the radiographs, based on the reporting system of REST. We constituted two groups according to the probable diagnosis of bone tumor (suspected benign tumor and suspected malignant tumor).

RESULTS

The mean score in the suspected benign tumor group was 1.1 (range 0-3, 95% CI 0.8-1.3) and in malignant tumor group was 6.1 (range 2-8, 95% CI 5.8-6.4). A receiver operator characteristic (ROC) curve for REST was with a cutoff of 3.5, with the most diagnostic value area under curve (AUC) of 0.99. The sensitivity was 98% and specificity was 100% with a positive predictive value of 100% and a negative predictive value of 98%. The inter-observer correlation coefficient was 0.985 (p value < 0.05), and Fleiss kappa value for the prediction of the benign or malignant lesion was 0.97 (p value < 0.05). The characteristics and content of tumor, cortical erosion, distinctiveness, distribution, periosteal reaction, and soft tissue mass had a significant correlation with the aggressiveness of bone lesion p value < 0.05.

CONCLUSIONS

The Radiological Evaluation Score for Bone Tumors (REST) is a structured reporting and objective method for the assessment of radiographs in patients with suspected bone tumors. This method is a reliable and helpful tool for clinicians in their outdoor patient department to differentiate a radiograph of a suspected benign tumor from a malignant bone tumor.

435 A Prospective Study of Post-operative Surgical Site Infection

Introduction

Organ specific surgical site infections are those that involve any part of the anatomy other than the incised body wall layer opened or manipulated during an operation. The proper understanding of bacteriology and mode of infections has surely reduced the incidence of wound infection, but it is not totally controlled.

Method

A total of 582 consecutive patient undergoing major and minor surgeries between March 2010 and October 2011 were included in the study. Detail history, physical examination, laboratory and radiological investigation according to Performa with special reference to any factor that could lead to postoperative infection – Age, sex, socioeconomic status, nutrition was recorded. Initial assessment of intra operative findings divided these cases into clean, clean contaminated, contaminated and dirty SSI.

Result

A total of 582 patients out of these, 100 have SSI, SSI rate in our hospital was found to be 17.18% including all classes of wounds. Coagulase positive staphylococci were responsible for a majority of SSIs and mixed infections were quite common. The other microorganism responsible for SSIs were E.coli, Coagulase negative staphylococci, Pseudomonas and Proteus etc.

Conclusions

The data from our study suggests a need to control modifiable risk factor responsible for development of SSI.

721 Imaging for Suspected Bowel Obstruction in Pennine Acute Trust (PAT): A Comparison with the National Audit of Small Bowel Obstruction’s (NASBO) recommendations

Background

NASBO recommends Computed Topography (CT) over plain abdominal X-ray (AXR) for the investigation of bowel obstruction (BO). AXR is routinely used within PAT for investigation of BO which may be exposing patients to unnecessary radiation and adding unnecessary cost to the service.

Method

A retrospective audit collected data on patients with CT confirmed BO between July 2019 and February 2020. This looked at the percentage of patients who had both CT and AXR to investigate BO. The cost of these AXRs and the percentage of these AXRs that were normal were also calculated.

Results

A search identified 141 patients with CT proven BO. 81/141(57.4%) patients had both AXR and CT as a part of their initial investigations. Of those patients 26/81(32.1%) had no AXR features suggestive of BO. Only 12/81(14.8%) of those patients had serial AXRs following initial imaging. The cost for one AXR is £34.15 which means £2766.15 was spent on potentially unnecessary AXRs within this period.

Conclusions

PAT is performing potentially unnecessary AXRs which is exposing patients to unnecessary radiation and costing the trust. Plain AXRs do not rule out BO. We have recommended an investigation flowchart to PAT A&E departments to reduce unnecessary AXRs being performed.

Prognosticating patients with necrotising otitis externa based on response to treatment

INTRODUCTION

Necrotising otitis externa (NOE) is a severe infection of the temporal bone. The traditional severity based staging system does not fully prognosticate all patients with NOE. We hypothesise that a patient response staging system would more accurately capture the disease process and guide prognosis.

METHODS

We carried out a retrospective notes review of patients diagnosed with NOE from January 2017 to December 2018 in a regional tertiary referral centre. Patient outcomes from our proposed patient response staging system were compared to a modified previously published severity based Gleeson staging system with patients requiring prolonged treatment classified as having a poor outcome.

RESULTS

A total of 34 patients were treated for NOE. The majority were male (n=24) and had diabetes (n=25). Patients with the most severe Gleeson staging did not have the worst outcome. Daily delay in resolution of otorrhoea was associated with an increased need for more than six weeks of treatment. Rapid responders are patients who had resolution of otalgia, otorrhoea and C-reactive protein normalisation within 14 days, and all were cured following standard 6 weeks of treatment.

CONCLUSIONS

The Gleeson staging system was valuable in assessing the extent of disease and all early Gleeson staged patients had good outcomes. However, patients with higher severity staging on the Gleeson system did not necessarily require prolonged treatment. There is a role for a joint approach in staging patients based on both modified Gleeson and treatment response, which would subsequently guide prognosis, duration of treatment and early diagnosis of potential fungal NOE.

Strongyloidiasis Of Duodenum Clinically Mimicking As Celiac Disease: A Case Report

Casestudy

Strongyloides stercoralis is classified as a roundworm or nematode. S. stercoralis is unique and different from other intestinal nematodes because of its ability to complete its life cycle within the host through an asexual auto infective cycle, allowing the infection to persist in the host indefinitely. It is usually asymptomatic can be symptomatic in immunocompromised individual leading to disseminated disease. Serology and stool microscopy are the investigations of choice. Though histopathology is the gold standard it is invasive procedure and has its own complication. strongyloidiasis is easily treatable with oral anthelminthic drugs. To date, only a limited number of cases has been published in our part of the world.

Strongyloidiasis is often asymptomatic in immunocompetent individuals. We present the case of a 34-year old man from hilly region of Nepal with complaints of on and off abdominal pain since one and half year. Over the last week his symptoms worsened with bilious vomiting, nausea, abdominal pain, loss of appetite and weight loss. Patient was short statured with multiple pruritic lesions over skin. A clinical diagnosis of celiac disease was suspected clinically. Blood examination was performed shows Microcytic Hypochromic Anemia with mild increase in eosinophils. Stool examination and serology was performed it was negative. An endoscopic biopsy from duodenum was performed and histopathologic examination revealed gastrointestinal strongyloidiasis.

Conclusion

Helminthic infections can clinically mimic large number of non-neoplastic and neoplastic diseases like celiac sprue, IBD, GI malignancy etc. The present case highlights the importance of basic investigation like multiple stool examination in patient with GI symptoms before subjecting the patient to invasive procedures.

Computed tomographic indications for occult skull fractures in paediatric head trauma diagnosed at the time of wound closure under general anaesthesia

Children with head injuries commonly present to the emergency department with forehead lacerations, and are frequently referred to the oral and maxillofacial team. Assessing the Glasgow coma scale (GCS) and neurological status of these patients is particularly challenging and there remains marked ambiguity regarding the use of computed tomographic (CT) imaging in children who have no obvious signs of traumatic brain injury. We present a case series of three patients who presented to our unit with forehead lacerations following a fall. All had a normal GCS, no obvious neurological signs, and all were listed for wound closure under general anaesthesia. Intraoperatively they were found to have underlying skull fractures that necessitated emergency CT whilst under general anaesthesia. Retrospective analysis was performed. Current guidelines and the literature were reviewed to identify factors that may help to identify occult skull fractures in the context of paediatric head trauma. Despite the subsequent discovery of skull fractures under general anaesthesia, none of our patients would have satisfied the present absolute indications for CT in the current guidelines. A number of helpful factors are not common in the UK guidelines but are present in others, including the presence of an appreciable haematoma and lacerations greater than 5 cm, amongst others. The assessment of paediatric patients with head trauma often remains a challenge when assessing for features such as headache, focal neurology, and amnesia. A high index of suspicion, formal examination under anaesthesia, and communication with the radiology department, are imperative if we are to avoid missing an occult injury that could potentially result in brain injury.

Two-Dimensional Binary Honeycomb Layer Formed by Ag and Te on Ag(111)

Inspired by the unique properties of graphene, research efforts have broadened to investigations of various other two-dimensional materials with the aim of exploring their properties for future applications. Our combined experimental and theoretical study confirms the existence of a binary honeycomb structure formed by Ag and Te on Ag(111). Low-energy electron diffraction shows sharp spots which provide evidence of an undistorted AgTe layer. Band structure data obtained by angle-resolved photoelectron spectroscopy are closely reproduced by first-principles calculations, using density functional theory (DFT). This confirms the formation of a honeycomb structure with one Ag and one Te atom in the unit cell. In addition, the theoretical band structure reproduces also the finer details of the experimental bands, such as a split of one of the AgTe bands.

Phase 2 study of the Exportin 1 inhibitor selinexor in patients with recurrent gynecological malignancies

BACKGROUND

Selinexor is an oral inhibitor of the nuclear export protein Exportin 1 (XPO1) with demonstrated antitumor activity in solid and hematological malignancies. We evaluated the efficacy and safety of selinexor in heavily pretreated, recurrent gynecological malignancies.

METHODS

In this phase 2 trial, patients received selinexor (35 or 50 mg/m2 twice-weekly [BIW] or 50 mg/m2 once-weekly [QW]) in 4-week cycles. Primary endpoint was disease control rate (DCR) including complete response (CR), partial response (PR) or stable disease (SD) ≥12 weeks. Secondary endpoints were progression-free survival (PFS), overall survival (OS) and safety.

RESULTS

114 patients with ovarian (N = 66), endometrial (N = 23) or cervical (N = 25) cancer were enrolled. Median number of prior regimens for ovarian, endometrial and cervical cancer was 6 (1-11), 2 (1-5), and 3 (1-6) respectively. DCR was 30% (ovarian 30%; endometrial 35%; cervical 24%), which included confirmed PRs in 8%, 9%, and 4% of patients with ovarian, endometrial, and cervical cancer respectively. Median PFS and OS for patients with ovarian, endometrial and cervical cancer were 2.6, 2.8 and 1.4 months, and 7.3, 7.0, and 5.0 months, respectively. Common Grade 3/4 adverse events (AEs) were thrombocytopenia (17%), fatigue (14%), anemia (10%), nausea (9%) and hyponatremia (9%). Patients with ovarian cancer receiving 50 mg/m2 QW had fewer high-grade AEs with similar efficacy as BIW treatment.

CONCLUSIONS

Selinexor demonstrated single-agent activity and disease control in patients with heavily pretreated ovarian and endometrial cancers. Side effects were a function of dose level and treatment frequency, similar to previous reports, reversible and mitigated with supportive care.

Short duration of untreated psychosis enhances negative symptom remission in extended early intervention service for psychosis

OBJECTIVE

To test whether duration of untreated psychosis (DUP) < 3 months, recommended by the World Health Organization/International Early Psychosis Association, enhances the effects of an extended early intervention service (EEIS) on symptom remission.

METHOD

We examined data from a randomized controlled trial in which patients who received 2 years of treatment in EIS for psychosis were subsequently randomized to either 3 years of EEIS or 3 years of regular care (RC). Using a DUP cut-off ≤ 12 weeks (approximately < 3 months), patients were split into two groups. Length of positive, negative and total symptom remission were the outcomes.

RESULTS

Patients (N = 217) were mostly male (68%) with schizophrenia spectrum disorder (65%); 108 (50%) received EEIS (58 had DUP ≤12 weeks; 50 had DUP >12 weeks). Interaction between treatment condition (EEIS vs. RC) and DUP cut-off ≤ 12 weeks was only significant in multiple linear regression model examining length of negative symptom remission as the outcome (adjusted β = 36.88 [SE = 15.88], t = 2.32, P = 0.02). EEIS patients with DUP ≤12 weeks achieved 25 more weeks of negative symptom remission than EEIS patients with DUP >12 weeks.

CONCLUSION

Having a short DUP may be critical in deriving long-term benefits from EIS for psychosis, including EEIS settings. This work empirically supports policy recommendations of reducing DUP <3 months.

Smartphone geospatial apps for dengue control, prevention, prediction, and education: MOSapp, DISapp, and the mosquito perception index (MPI)

India has the largest number of dengue cases in the world, contributing approximately 34% of the global burden. The framework for a geospatially enabled early warning and adaptive response system (EWARS) was first proposed in 2008. It was meant to be a decision support system for enhancing traditional surveillance methods for preventing mosquito-borne diseases in India by utilizing remote sensing data and fuzzy logic-based mathematical predictive modeling. This conceptual paper presents a significant evolution of EWARS such that it synthesizes inputs from not only traditional surveillance and reporting systems for dengue but also from the public via participatory disease surveillance. Two smartphone-based applications have been developed to support EWARS. The first-MOSapp-allows field health workers to upload surveillance data and collect key data on environmental parameters by both direct observation and via portable microclimate stations. The second-DISapp-collects relevant information directly from the community to support participatory disease surveillance. It also gives the user a real-time estimate of the risk of exposure to dengue in proximity to their home and has an educational component that provides information on relevant preventive measures. Both applications utilize a new mosquito abundance measure-the mosquito perception index (MPI)-as reported by the user. These data streams will feed into the EWARS model to generate dynamic risk maps that can guide resource optimization and strengthen disease surveillance, prevention, and response. It is anticipated that such an approach can assist in addressing gaps in the current system of dengue surveillance and control in India.