Clinical characteristics of people with intellectual disability admitted to hospital with constipation: identifying possible specific high-risk factors

BACKGROUND

People with intellectual disabilities (ID) die on an average 20 years earlier to the general population. They have higher rates of multimorbidity and polypharmacy. Around 25% of people with ID report chronic constipation. The England Learning Disabilities Mortality Review found that nearly 25% of deaths identified constipation as a long-term health problem. However, the likely risk factors for constipation related harm are poorly enumerated. We sought to identify possible specific high-risk factors by examining the clinical characteristics of people with ID admitted to hospital with constipation.

METHODS

Data of people with ID admitted with constipation in two general hospitals covering a population of 1.3 million from 2017 to 2022 were reported using the STROBE guideline for cohort studies. Collected data included age, gender, intellectual disability severity, recorded medication, presenting complaint and co-morbidities. The medication anticholinergic burden was calculated using the anticholinergic burden scale. Continuous variables were summarised by mean and standard deviation if normally distributed, with categorical variables summarised by the number and percentage in each category.

RESULTS

Of 46 admissions (males 52%), 57% had moderate to profound ID, 37% had epilepsy, 41% prescribed antiseizure medication (ASM) and 45% were on laxatives. Average age was 46 years. The anticholinergic burden score mean was 2.3 and median, one.

CONCLUSIONS

We can hypothesise that people with more severe ID, suffering from epilepsy and on ASM may be more at risk of developing severe constipation. Some admissions may be avoided with earlier use of laxatives in the community.

The inclusion of adults with intellectual disabilities in health research - challenges, barriers and opportunities: a mixed-method study among stakeholders in England

BACKGROUND

The study aims to understand system barriers to research participation for people with intellectual disabilities.

METHODS

A mixed-methods approach examined the inclusivity of people with intellectual disabilities (IDs) in a random sample of National Institute for Health and Care Research (NIHR) studies conducted in 2019-2020. An online questionnaire (stage 1) was sent to the selected studies lead investigators. An expert by experience panel of 25 people with intellectual disabilities (IDs, stage 2), discussed the stage 1 feedback. Descriptive statistics for quantitative data and thematic analysis for qualitative data was conducted.

RESULTS

Of 180 studies reviewed, 131 studies (78%) excluded people with IDs. Of these, 45 (34.3%) study researchers provided feedback. Seven (20%) of the 34 studies which included people with IDs gave feedback. Of all respondents over half felt their study had some relevance to people with IDs. A minority (7.6%) stated their study had no relevance. For a quarter of respondents (23.5%), resource issues were a challenge. Qualitative analysis of both stages produced four overarching themes of Research design and delivery, Informed consent, Resource allocation, and Knowledge and skills.

CONCLUSION

Health research continues to exclude people with IDs. Researchers and experts by experience identified non-accessible research design, lack of confidence with capacity and consent processes, limited resources such as time and a need for training as barriers. Ethics committees appear reluctant to include people with cognitive deficits to 'protect' them. People with IDs want to be included in research, not only as participants but also through coproduction.

Theoretical aspects of the adsorption of normal and modified base pairs of DNA on graphene models toward DNA sequencing

A theoretical understanding of the adsorption of DNA base pairs (GC, AT, CAF-T and CAF-C) on the graphene models (Gr, SiGr and SiGr-COOH) is investigated. Among the complexes, SiGr-COOH_AT is found to have the highest adsorption energies of -202.83 kcal/mol. The strong adsorption between DNA base pairs and the SiGr-COOH model leads to concomitant charge transfer responsible for the stability of the corresponding models and is verified with NBO analysis. AIM analysis discloses the high orbital overlap that signifies the strong interaction. Closed-shell interactions are observed through the positive values of total electron density, and it is also observed that Si-O(N) interaction has both covalent and electrostatic characteristics. This is the first theoretical attempt to investigate the adsorption of DNA base pairs on SiGr-COOH, which is more favourable than other models and may call for further experimental studies, which is crucial in developing new bio-sensors.Communicated by Ramaswamy H. Sarma.

Awareness of social care needs in people with epilepsy and intellectual disability

BACKGROUND

Nearly a quarter of people with intellectual disability (ID) have epilepsy with large numbers experiencing drug-resistant epilepsy, and premature mortality. To mitigate epilepsy risks the environment and social care needs, particularly in professional care settings, need to be met.

PURPOSE

To compare professional care groups as regards their subjective confidence and perceived responsibility when managing the need of people with ID and epilepsy.

METHOD

A multi-agency expert panel developed a questionnaire with embedded case vignettes with quantitative and qualitative elements to understand training and confidence in the health and social determinants of people with ID and epilepsy. The cross-sectional survey was disseminated amongst health and social care professionals working with people with ID in the UK using an exponential non-discriminative snow-balling methodology. Group comparisons were undertaken using suitable statistical tests including Fisher's exact, Kruskal-Wallis, and Mann-Whitney. Bonferroni correction was applied to significant (p < 0.05) results. Content analysis was conducted and relevant categories and themes were identified.

RESULTS

Social and health professionals (n = 54) rated their confidence to manage the needs of people with ID and epilepsy equally. Health professionals showed better awareness (p < 0.001) of the findings/recommendations of the latest evidence on premature deaths and identifying and managing epilepsy-related risks, including the relevance of nocturnal monitoring. The content analysis highlighted the need for clearer roles, improved care pathways, better epilepsy-specific knowledge, increased resources, and better multi-disciplinary work.

CONCLUSIONS

A gap exists between health and social care professionals in awareness of epilepsy needs for people with ID, requiring essential training and national pathways.

Detection and genetic diversity of porcine rotavirus A, B and C in eastern Australian piggeries

Rotaviruses (RV) have a high prevalence in piggeries worldwide and are one of the major pathogens causing severe diarrhoea in young pigs. RV species A, B, and C have been linked to piglet diarrhoea in Australian pig herds, but their genetic diversity has not been studied in detail. Based on sequencing of the structural viral protein 7 (VP7) RVA G genotypes G3, G4 and G5, and RVC types G1, G3, G5, and G6 have been identified in Australian piggeries in previous studies. Although occurrence of RVB was reported in Australia in 1988, no further genetic analysis has been conducted. To improve health management decisions in Australian pig herds, more information on RV prevalence and genetic diversity is needed. Here, 243 enteric samples collected from 20 pig farms within Eastern Australia were analysed for the presence of RV in different age groups using a novel PCR-based multiplex assay (Pork MultiPath™ enteric panel). RVA, RVB, and RVC were detected in 10, 14, and 14 farms, respectively. Further sequencing of VP7 in selected RV-positive samples revealed G genotypes G2, G5, G9 (RVA), G6, G8, G14, G16, G20 (RVB), and G1, G3, G5, G6 (RVC) present. RVA was only detected in young (<10 weeks old) pigs whereas RVB and RVC were also detected in older animals (>11 weeks old). Interestingly, RVB and RVC G-type occurrence differed between age groups. In conclusion, this study provides new insights on the prevalence and diversity of different RV species in pig herds of Eastern Australia whilst demonstrating the ability of the Pork MultiPath™ technology to accurately differentiate between these RV species.

An evidence-based approach to provide essential and desirable components to develop surveys on Sudden Unexpected Death in Epilepsy (SUDEP) for doctors: A focused review

Sudden Unexpected Death in Epilepsy (SUDEP) is a major concern for people with epilepsy, their families, their care givers, and medical professionals. There is inconsistency in the SUDEP counselling doctors provide, compared to what is recommended in clinical guidelines. Numerous national and international surveys have highlighted how epilepsy professionals, usually doctors, deliver SUDEP risk counselling, particularly, when they deliver it and to whom. These surveys help understand the unmet need, develop suitable strategies, and raise awareness among clinicians with the eventual goal to reduce SUDEPs. However, there is no standardised survey or essential set of questions identified that can be used to evaluate SUDEP counselling practice globally. This focused review analyses the content of all published SUDEP counselling surveys for medical professionals (n=16) to date covering over 4000 doctors across over 30 countries and five continents. It identifies 36 question themes across three topics. The questions are then reviewed by an expert focus group of SUDEP communication experts including three doctors, an expert statistician and SUDEP Action, an UK based charity specialising in epilepsy deaths with a pre-set criterion. The review and focus group provide ten essential questions that should be included in all future surveys inquiring on SUDEP counselling. They could be used to evaluate current practice and compare findings over time, between services, across countries and between professional groups. They are provided as a template to download and use. The review also explores if there is a continued need in future for similar surveys to justify this activity.

Black carbon over a high altitude Central Himalayan Glacier: Variability, transport, and radiative impacts

Ambient equivalent black carbon (BC) measurements spanning from June to October have been carried out over an adjoining location of Satopanth and Bhagirath-Kharak Glaciers (3858m, amsl) of Central Himalaya during the year 2019. Hourly BC varied from 12 ng m^-3 to 439 ng m^-3 during the entire period of observation. Monthly averaged BC values showed the highest concentration during June (230.96 ± 85.46 ng m^-3) and the lowest in August (118.02 ± 71.63 ng m^-3). The decrease in BC during monsoon months is attributed to limited long-range transport and rapid wet scavenging processes. Transport model studies indicate a higher retention time of tracer in Uttarakhand, Punjab, Haryana, and adjacent polluted valley regions with increased biomass burning (BB) incidences. The high rate of BC influx during June, September, and October was attributed to transport from the polluted Indo-Gangetic Plain (IGP) region, wildfires, and vehicular emissions in the valley region. Higher equivalent brown carbon (BrC) influx is linked to BB, especially wood-burning, during intense forest fires at slopes of mountains. Data obtained from limited BC observations during the 2011-19 period showed no significant BC influx change during post-monsoon. The strong correlation between BC mass and BB affirms the dominant role of BB in contributing BC to the Glacier region. Increased TOA forcing induced by surface darkening and BC atmospheric radiative heating indicate an additional warming and possible changes of the natural snow cycle over the glacier depending on the characteristics and extent of debris cover.

A first principle study of heme molecule as an active adsorbent for halogenated hydrocarbons

Heme, a biomolecule with complex structure and unique properties and strong adsorption of oxygen, is utilized as an adsorbing material for haloalkene gas molecules. It has been systematically investigated employing density functional theory. Among the haloalkene gases chosen in the present study, the interaction energy is maximum for CDFM (-10.66 kcal/mol) and lowest for TFM (-5.02 kcal/mol). The calculated bond stabilization energy for heme-haloalkene complexes correlates with findings of interaction energy. The noncovalent interaction between heme and haloalkenes is confirmed from the topological analysis. The energy gap values decrease on adsorption of haloalkenes along with a decrease in reactivity of the complexes.

Tuning the reactivity of tri-s-triazine, trinitro-tri-s-triazine and ternary tri-s-triazine graphitic C3N4 quantum dots through H-functionalized and B-doped complexes: A density functional study

Modifying the structures and doping are proven to be effective methods to tune the structural and electrical properties of g-C₃N₄ quantum dots. Hence, in this study, tri-s-triazine and tri-nitro tri-s-triazine have been studied by functionalizing their edges with hydrogen. The H-functionalized tri-nitro tri-s-triazine quantum dot displays a buckled structure with a band gap of 1.988 eV, whereas the tri-s-triazine demonstrates a planner structure with a band gap of 1.636 eV. The obtained results have been compared with the previous results. The absorbance spectrum of H-functionalized trinitro tri-s-triazine falls under the visible region with a peak value of 488 nm, and the absorption spectrum of tri-s-triazine falls at 790 nm. The planarity of the tri-nitro tri-s-triazine structure is improved by doping the B atom in the N site, and the band gap of H-functionalized B doped tri-nitro tri-s-triazine is 1.143 eV. The absorbance spectrum of H-functionalized B doped tri-nitro tri-s-triazine is 508 nm. The reactivity of the structure is increased by doping B atoms, and it is confirmed by the electrophilicity index. Similarly, the H-functionalized B doped tri-s-triazine exhibits a band gap of 1.328 eV. Further, the tri-s-triazine structures are arranged in ternary form, and the properties are studied by increasing the number of B atoms in the tri-s-triazine rings. The outcome presents that the structures are planar, and band gap values are reduced further. Also, the reactivity of the sheets is increased, which is confirmed by the electrophilicity index. It is proposed that the sheets with a high reactivity can be used for the removal of hazardous ions and molecules from the industrial wastage.

Epilepsy, anti-seizure medication, intellectual disability and challenging behaviour - Everyone's business, no one's priority

PURPOSE

People with Intellectual Disability (ID) and epilepsy are more likely to experience psychiatric conditions, challenging behaviour (CB), treatment resistance and adverse effects of anti-seizure medications (ASM) than those without. This population receives care from various professionals, depending on local care pathways. This study evaluates the training status, confidence, reported assessment and management practices of different professional groups involved in caring for people with ID, epilepsy and CB.

METHODS

A cross sectional survey using a questionnaire developed by expert consensus which measured self-reported training status, confidence, and approaches to assessment and management of CB in people with ID and epilepsy was distributed to practitioners involved in epilepsy and/or ID.

RESULTS

Of the 83 respondents, the majority had either a psychiatry/ID (n = 39), or Neurology/epileptology background (n = 31). Psychiatry/ID and Neurology/epileptology had similar confidence in assessing CB in ID-epilepsy cases, but Psychiatry/ID exhibited higher self-rated confidence in the management of these cases. While assessing and managing CB, Psychiatry/ID appeared more likely to consider mental health aspects, while Neurology/epileptology typically focused on ASM.

CONCLUSION

Psychiatry/ID and Neurology/epileptology professionals had varying training levels in epilepsy, ID and CB, had differing confidence levels in managing this patient population, and considered different factors when approaching assessment and management. As such, training opportunities in ID should be offered to neurology professionals, and vice versa. Based on the findings, a best practice checklist is presented, which aims to provide clinicians with a structured framework to consider causal explanations for CB in this population.

Exploring the synergistic effect of NixSn2xS4x thiospinel with MWCNTs for enhanced performance in dye-sensitized solar cells, the hydrogen evolution reaction, and supercapacitors

Trifunctional nickel tin sulfide (NixSn2xS4x) with a thiospinel-like structure composited with multiwalled carbon nanotubes (MWCNTs) (M-NixSn2xS4x) was synthesized by a facile method. The unit cell arrangement of the prepared composite was studied by density functional theory, and the theoretical interpretation satisfactorily inferred the presence of a synergistic effect between the thiospinel and MWCNTs. The high metallic conductivity and superior electrocatalytic activity of the M-NixSn2xS4x composite endow it with diverse applications. The composite shows promise as a counter electrode for dye-sensitized solar cells (efficiency of 4.67% for fluorine-doped indium tin oxide compared to 5.23% for platinum); an efficient catalyst for the hydrogen evolution reaction with good cycling stability and a low overpotential of -41 mV at a cathode current density of 10 mA cm2 and a Tafel slope of 43 mV dec-1 on a graphite sheet electrode; and an impressive capacitance material on a graphite sheet electrode alternative to expensive current collectors such as Ni foam, with a specific capacitance value of 1200 F g-1 at a current density of 1 A g-1 and a long life span of 92.6% that is retained for up to 15 000 cycles.

Insights into structural and inhibitory mechanisms of low pH-induced conformational change of influenza HA2 protein: a computational approach

Though oseltamivir and zanamivir are the active anti-influenza drugs, the emergence of different strains of influenza A virus with mutations creates drug-resistance to these drugs. Therefore, it is essential to find a suitable approach to stop the viral infection. The present study focuses on understanding the conformational changes of the HA2 protein at different pH levels (pH 7, pH 6, pH 5) and on blocking the low pH-induced conformational changes of the HA2 protein with a suitable ligand using molecular docking and molecular dynamics (MD) simulation methods. As the pH value decreases to pH 5, the protein undergoes large conformational changes with less stability in the order of pH 7 > pH 6 > pH 5. The fusion peptide (residues 1-20) and the extended loop (residues 58-75) deviate more at pH 5. The ligand stachyflin bound between the N- and C-terminal helix regions retains the stability of the HA2 protein at pH 5 and blocks the low pH-induced conformational transition. The performance of stachyflin is increased when it directly interacts with residues at the intramonomer binding site rather than the intermonomer binding site. The susceptibility of the HA2 protein of different subtypes to stachyflin is in the order of H1 > H7 > H5 > H2 > H3. Stachflin has a higher binding affinity for H1 (at pH 7, pH 6, pH 5) and H7 subtypes than others. Lys47, Lys58, and Glu103 are the key residues that favor the binding and highly stabilize the HA2 protein at low pH. Graphical abstract Low pH-induced conformational change of influenza HA2 protein.

Structural insights into the anti-cancer activity of quercetin on G-tetrad, mixed G-tetrad, and G-quadruplex DNA using quantum chemical and molecular dynamics simulations

Human telomerase referred as 'terminal transferase' is a nucleoprotein enzyme which inhibits the disintegration of telomere length and act as a drug target for the anticancer therapy. The tandem repeating structure of telomere sequence forms the guanine-rich quadruplex structures that stabilize stacked tetrads. In our present work, we have investigated the interaction of quercetin with DNA tetrads using DFT. Geometrical analysis revealed that the influence of quercetin drug induces the structural changes into the DNA tetrads. Among DNA tetrads, the quercetin stacked with GCGC tetrad has the highest interaction energy of -88.08 kcal/mol. The binding mode and the structural stability are verified by the absorption spectroscopy method. The longer wavelength was found at 380 nm and it exhibits bathochromic shift. The findings help us to understand the binding nature of quercetin drug with DNA tetrads and it also inhibits the telomerase activity. Further, the quercetin drug interacted with G-quadruplex DNA by using molecular dynamics (MD) simulation studies for 100 ns simulation at different temperatures and different pH levels (T = 298 K, 320 K and pH = 7.4, 5.4). The structural stability of the quercetin with G-quadruplex structure is confirmed by RMSD. For the acidic condition (pH = 5.4), the binding affinity is higher toward G-quadruplex DNA, this result resembles that the quercetin drug is well interacted with G-quadruplex DNA at acidic condition (pH = 7.4) than the neutral condition. The obtained results show that quercetin drug stabilizes the G-quadruplex DNA, which regulates telomerase enzyme and it potentially acts as a novel anti-cancer agent.Communicated by Ramaswamy H. Sarma.

Reduced bond length alternation and helical molecular orbitals in donor and acceptor substituted linear carbon chains

Increasing chain length and end group substitution of polyynes play a crucial role in molecular electronics and nanomaterials. The studies on linear carbon chains are lesser when compared to other carbon allotropes like graphene, fullerenes, nanotube, etc. This prompted us to study the linear carbon chains of different lengths and substitutions. The electronic and optical properties of X–C[Formula: see text]–X ([Formula: see text]–15 and [Formula: see text], NH2, CN, OH) molecules have been studied by using CAM-B3LYP/6-31G* level of theory of DFT methods. Linear carbon chains with odd values of n show lower bond length alternation (BLA) values similar to that of cumulenes and may have metallic property, but the substitution of donor/acceptor molecules does not decrease the BLA significantly. Molecular orbital analysis of linear carbon chains shows that NH2 or NO2 substituted polyynes have helical molecular orbitals for smaller chain lengths which may make a good candidate for molecular wires in molecular devices. As the chain length increases, the helicity decreases and finally disappears. Also, it is seen that for smaller odd values of [Formula: see text] for donor, substituted polyynes have a singlet ground, whereas all the odd [Formula: see text] values of acceptor substitution have triplet ground state.

New cytochalasin from Rosellinia sanctae-cruciana, an endophytic fungus of Albizia lebbeck

AIM

To explore the potential of Rosellinia sanctae-cruciana an endophytic fungus associated with Albizia lebbeck for pharmaceutically important cytotoxic compounds.

METHODS AND RESULTS

One novel cytochalasin, named jammosporin A (1) and four known analogues (2-5) were isolated from the culture of the endophytic fungus R. sanctae-cruciana, harboured from the leaves of the medicinal plant A. lebbeck. Their structures were elucidated by extensive spectroscopic analyses including one-dimensional and two-dimensional nuclear magnetic resonance data along with MS data and by comparison with literature reports. In preliminary screening the ethyl acetate extract of the fungal culture was tested for cytotoxic activity against a panel of four cancer cell lines (MOLT-4, A549, MIA PaCa-2 and MDA-MB-231), and found to be active against MOLT-4 with an IC₅₀ value of 10 μg ml^-1 . Owing to the remarkable cytotoxic activity of the extract the isolated compounds (1-5) were evaluated for their cytototoxicity against the MOLT-4 cell line by MTT assay. Interestingly, compounds 1-2, 4 and 5 showed considerable cytotoxic potential against the human leukaemia cancer cell line (MOLT-4) with IC₅₀ values of 20·0, 10·0, 8·0 and 6·0 μmol l^-1 , respectively, while compound 3 showed an IC₅₀ value of 25 μmol l^-1 . This is the first report of the existence of this class of secondary metabolites in R. sanctae-cruciana fungus.

CONCLUSION

This study discovered a novel compound, named jammosporin A, isolated for the first time from R. sanctae-cruciana, an endophytic fungus of A. lebbeck with anticancer activity against the MOLT-4 cell line.

SIGNIFICANCE AND IMPACT OF THE STUDY

Rosellinia sanctae-cruciana represents an interesting source of a new compound with bioactive potential as a therapeutic agent against a human leukaemia cancer cell line (MOLT-4).

Decreasing the risk of sudden unexpected death in epilepsy: structured communication of risk factors for premature mortality in people with epilepsy

BACKGROUND AND PURPOSE

Good practice guidelines highlight the importance of making people with epilepsy aware of the risk of premature mortality in epilepsy particularly due to sudden unexpected death in epilepsy (SUDEP). The SUDEP and Seizure Safety Checklist ('Checklist') is a structured risk communication tool used in UK clinics. It is not known if sharing structured information on risk factors allows individuals to reduce SUDEP and premature mortality risks. The aim of this study was to ascertain if the introduction of the Checklist in epilepsy clinics led to individual risk reduction.

METHODS

The Checklist was administered to 130 consecutive people with epilepsy attending a specialized epilepsy neurology clinic and 129 attending an epilepsy intellectual disability (ID) clinic within a 4-month period. At baseline, no attendees at the neurology clinic had received formal risk advice, whereas all those attending the ID clinic had received formal risk advice on multiple occasions for 6 years. The Checklist was readministered 1 year later to each group and scores were compared with baseline and between groups.

RESULTS

Of 12 risk factors considered, there was an overall reduction in mean risk score for the general (P = 0.0049) but not for the ID (P = 0.322) population. Subanalysis of the 25% of people at most risk in both populations showed that both sets had a significant reduction in risk scores (P < 0.001).

CONCLUSION

Structured discussion results in behavioural change that reduces individual risk factors. This impact seems to be higher in those who are at current higher risk. It is important that clinicians share risk information with individuals as a matter of public health and health promotion.

Metal chelating ability and antioxidant properties of Curcumin-metal complexes - A DFT approach

Curcumin, a well-documented phytochemical compound used to treat various diseases because of its more tolerability in the human body and has no side effects. The present study describes the metal chelating ability of Curcumin for Mn²⁺, Fe²⁺ and Zn²⁺ metal ions and their antioxidant properties using density functional theory in both gas and DMSO solvent phases. Results reveal that the carbonyl group at diketo moiety is destabilized due to the metal ion coordination. The interaction energies reveal that CurEN-Zn²⁺ are the most stable rather than the CurEN-Mn²⁺ and CurEN-Fe²⁺ complexes. The AIM analysis confirms that the interaction between the metal ions and Curcumin are to be electrostatic dominant. The HOMO-LUMO orbital analysis shows that the charge transfer interaction is dominant for CurEN-Mn²⁺ and CurEN-Fe²⁺ complexes. The DMSO solvent interactions decrease the stability of the CurEN-M²⁺ cation complexes. The antioxidant mechanism is more reactive for metal complexes than the isolated Curcumin. Since Curcumin possess both metal chelating and antioxidant properties, it can be used in chelation therapy for the cure of Alzheimer's disease.

Plasma Cell Infiltration of the Kidney as a Manifestation of Myeloma: A Report of Three Cases

Infiltration of renal parenchyma by neoplastic plasma cells in myeloma patients is an unusual finding. We report 3 cases of myeloma, with renal biopsy being the first clue to the diagnosis in one. The plasma cell infiltrate in other two cases was not so evident but immunofluorescence (IF) and immunohistochemical (IHC) stains for light chains helped establish the monoclonal nature of the infiltrate. We surmise that plasma cell infiltration in the kidney can be an important clue to the diagnosis of an underlying myeloma and could in future be regarded as a myeloma-defining event (MDE) if monoclonality is confirmed. This finding could directly affect the prognosis and be a direct indicator of the tumor burden. Further studies are however required to determine the exact prognostic value and precise relationship of such a finding with deranged renal functions in myeloma.

Role of 6-Mercaptopurine in the potential therapeutic targets DNA base pairs and G-quadruplex DNA: insights from quantum chemical and molecular dynamics simulations

The theoretical studies on DNA with the anticancer drug 6-Mercaptopurine (6-MP) are investigated using theoretical methods to shed light on drug designing. Among the DNA base pairs considered, 6-MP is stacked with GC with the highest interaction energy of -46.19 kcal/mol. Structural parameters revealed that structure of the DNA base pairs is deviated from the planarity of the equilibrium position due to the formation of hydrogen bonds and stacking interactions with 6-MP. These deviations are verified through the systematic comparison between X-H bond contraction and elongation and the associated blue shift and red shift values by both NBO analysis and vibrational analysis. Bent's rule is verified for the C-H bond contraction in the 6-MP interacted base pairs. The AIM results disclose that the higher values of electron density (ρ) and Laplacian of electron density (∇²ρ) indicate the increased overlap between the orbitals that represent the strong interaction and positive values of the total electron density show the closed-shell interaction. The relative sensitivity of the chemical shift values for the DNA base pairs with 6-MP is investigated to confirm the hydrogen bond strength. Molecular dynamics simulation studies of G-quadruplex DNA d(TGGGGT)₄ with 6-MP revealed that the incorporation of 6-MP appears to cause local distortions and destabilize the G-quadruplex DNA.

An evidenced based checklist to support anti-dementia medication withdrawal in people with down syndrome (DS), intellectual disability (Id) and dementia

DS with aging is associated with greatly increased risk of developing dementia similar to Alzheimer's. Anti-dementia drug discontinuation is recommended when clinical benefit is not determined. In DS it is more complex as medication ill effects of stopping needs to be weighed in balance to extraneous processes such as environment changes, sensory impediments and physical ill health and natural progression of dementia.

Aim

Can identified risk factors extracted from a comprehensive literature review be developed into an evidence based check list to support risk minimized person centered withdrawal of anti-dementia drugs when considered not to be efficacious in DS?

Method

A detailed literature review using Medline, PsychInfo, Cinahl and Embase with relevant search terms in various permutations and combinations without any date limit enquiring current evidence base on anti-dementia medication withdrawal was conducted. The review also looked to extract the common risk factors in stopping medication. All risk factors were collated, reviewed by a focus group of experts, developed into a checklist.

Results

Thirty abstracts were obtained following the search. Six papers were short-listed. No papers identified a structured approach to medication reduction. An 18-factor checklist was applied prospectively to 30 cases. The checklist was sensitive to identify change to guide clinical decision-making.

Conclusions

Currently, decision to peg medication withdrawal risk is arbitrary and clinical in dementia especially in DS dementia. The evidenced based developed checklist is useful to support and structure clinical decisions. It helps clinicians and patients to focus on promoting safety, reduce harm and guide treatment.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Zero suicide southwest UK initiative – Steps to mitigate suicide risk in local populations using quality improvement methodology and a whole life approach

Background

Only 25% of people who die by suicide see mental health services. Suicide is not just a health issue. Its causation and consequences lie within all of society. Many erroneously believe that suicide is inevitable and not preventable, because its causation is too complex. Underlying associations with suicide are largely social. There are programmes in the USA, which have combined interventions to reduce suicides. The 2014 UK suicide rate per 100,000 was 10.8 but 11.1 in South West (SW) England (pop: 5 million). A whole system approach is necessary. Zero Suicides SW is a project to address this.

Aim

(1) To develop a regional strategy to reduce and prevent suicide. (2) To make whole populations suicide risk aware. (3) Reduce regional suicide rates.

Method

A collaborative involving national and local 60 organisations including charities and voluntary sector was formed. Five collaborative meetings used narratives of suicide survivors, national experts led themed workshops, etc. to come up with a regional strategy. Quality Improvement (QI) Methodology was used to develop and examine the success of all projects.

Outputs

Initiatives such as using local radio stations for mental health promotion, collaboration via a poster campaign with local breweries and pubs to make men more self-aware of risk, suicide risk counselling for relatives/carers of patients admitted to psychiatric care, improving scrutiny to access to medication for recently discharged psychiatric patients have developed from the project. The QI model demonstrated how localised changes at person and organisation level could combine and have a powerful role in suicide prevention.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

A Simple Composite Dynamic Digital Tool to Communicate Complex Physical and Mental Health needs and Measure Outcomes: The Cornwall Health Radar

Introduction

Clinician-patient communication is a major factor in influencing outcomes of healthcare. Complexity increases if an individual has multiple health needs requiring support of different clinicians or agencies.

Aim

To develop and evidence a simple dynamic computerised tool to capture and communicate outcomes of intervention or alteration in clinical need in patients with multiple chronic health needs.

Method

A MS Excel algorithm was designed for swift capture of clinical information discussed in an appointment using pre-designed set of evidenced based domains. An instant personalized single screen visual is produced to facilitate information sharing and decision-making. The display is responsive to compare changes across time. A prototype was conceptually tested in an epilepsy clinic for people with Intellectual disability (ID) due to the unique challenges posed in this population.

Results

Evidence across 300 patients with ID and epilepsy showed the tool works by enhancing reflective communication, compliance and therapeutic relationship. Medication and appointment compliance was 95% and patient satisfaction over 90%.

Conclusion

To discuss all influencing health factors in a consultation is a communication challenge esp. if the patient has multiple health needs. A picture equals 1000 words and helps address the cognitive complexity of verbal information. The radar offers an evidenced based common framework to host care plans of different health conditions. It provides individualised easy view person centred care plans to allow patients to gain insight on how the different conditions impact on their overall well being and be active participants. The tool will be practically demonstrated.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Theoretical studies on the interaction between the nitrile-based inhibitors and the catalytic triad of Cathepsin K

Computational studies on the interaction of novel inhibitor compounds with the Cathepsin K protease have been performed to study the inhibition properties of the inhibitor compounds. The quantum chemical calculations have been performed to analyze the molecular geometries, structural stability, reactivity, nature of interaction, and the charge transfer properties using B3LYP level of theory by implementing 6-311g(d,p) basis set. The calculated C-S and N-H…N bond lengths of the inhibitor-triad complexes are found to agree well with the previous literature results. The chemical reactivity of the inhibitors and catalytic triad are analyzed through frontier molecular orbital analysis and found that the inhibitors are subjected to nucleophilic attack by the catalytic triad. The nature of inhibition of the inhibitor compounds is examined using the quantum theory of Atoms in Molecules analysis and found to be partially covalent. The NBO stabilization energy for the Cys - inhibitor are found to be most stable than the other interactions. The molecular dynamic simulations were performed to study the influence of dynamic of the active site on the QM results. The many body decomposition interaction energy calculated for the final results of MD simulation reveals that the dynamic of the active site induces significant changes in the interaction energy and occupancy of H-bonds plays a major role in the stabilizing the active site inhibitor interactions. The present study reveals that the inhibitor compounds can inhibit the proteolytic activity of the proteases on binding with the catalytic active site.

Unpredicted formation of copper(ii) complexes containing 2-thiophen-2-yl-1-thiophen-2-ylmethyl-1H-benzoimidazole and their most promising in vitro cytotoxicity in MCF-7 and HeLa cell lines over cisplatin

An in situ reaction of CuCl₂·2H₂O, o-phenylenediamine, thiophene-2-carbaldehyde and sodium azide in methanol afforded complex 1a.

Rock magnetic finger-printing of soil from a coal-fired thermal power plant

We present seasonal rock magnetic data for 48 surficial soil samples collected seasonally around a coal-fired thermal power plant on the southwest coast of India to demonstrate how fly ash from the power plant is transported both spatially and seasonally. Sampling was carried out during pre-monsoon (March), early-monsoon (June), monsoon (September) and post-monsoon (December) seasons. Low- and high-frequency magnetic susceptibility (χlf and χhf), frequency-dependent magnetic susceptibility (χfd), χfd %, isothermal remanent magnetization (IRM), "hard" IRM (HIRM), saturation IRM (SIRM) and inter-parametric ratios were determined for the samples. Scanning electron microscopy (SEM) was used on limited number of samples. NOAA HYSPLIT MODEL backward trajectory analysis and principal component analysis were carried out on the data. Fly ash samples exhibit an average HIRM value (400.07 × 10(-5) Am(2) kg(-1)) that is comparable to that of soil samples. The pre- and post-monsoon samples show a consistent reduction in the concentration of magnetically "hard" minerals with increasing distance from the power plant. These data suggest that fly ash has indeed been transported from the power plant to the sampling locations. Hence, HIRM may perhaps be used as a proxy for tracking fly ash from coal-fired thermal power plants. Seasonal data show that the distribution of fly ash to the surrounding areas is minimum during monsoons. They also point to the dominance of SP magnetite in early-monsoon season, whereas magnetic depletion is documented in the monsoon season. This seasonal difference is attributable to both pedogenesis and anthropogenic activity i.e. operation of the thermal power plant.

Fasciolopsiasis: Endemic focus of a neglected parasitic disease in Bihar

PURPOSE

To describe a newly discovered, previously unreported endemic focus of fasciolopsiasis in the Phulwaria village, under tehsil Sugauli, East Champaran, Bihar.

MATERIALS AND METHODS

A study was conducted at village Phulwaria, following diagnosis of fasciolopsiasis in three children from the village. A total of 120 individuals, including all the children and adults who gave history of recent passage of red fleshy masses in their stool, were included in the study. The cases of fasciolopsiasis were treated with Praziquantel 25 mg/kg, three doses a day. Risk factors for the transmission of the parasite in the village were also studied.

RESULTS

Questionnaire revealed majority of the population suffering from abdominal discomfort and passage of red fleshy masses in stool. These fleshy masses were identified as Fasciolopsis buski. One hundred and eighteen individuals were presumably considered as cases of the parasitic infection. After treatment with Praziquantel, all of them passed the parasite in their stool for the next 2-3 days. On investigating, it was observed that all the conditions required for effective continuation of the life cycle of the parasite were present in this village.

CONCLUSION

This study draws attention to a new endemic focus of fasciolopsiasis in Bihar, with a very high prevalence due to poverty, the lack of awareness about the parasite in villagers as well as ignorance among local medical practitioners. There is an urgent need for mass campaign around the region for its effective control.