BTEX (benzene, toluene, ethylbenzene, and xylene) and risk of cancer - a study from Centers for Disease Control and Prevention's National Health and Nutrition Examination Survey

Introduction/Objective

BTEX (benzene, toluene, ethylbenzene, and xylene) is well know for its toxicity via through environmental, occupational and recreational exposures. However, there is limited literature about the carcinogenic effect of BTEX. Hence, we aim to study the prevalence and association of cancer amongst individuals with exposure of BTEX.

Methods/Case Report

A retrospective cross-sectional study was performed between 2013 and 2018 utilizing the NHANES database. Adult individuals having data on socio-demographic questionnaires and lab findings on exposure to BTEX were included. Prevalence of cancer was identified amongst exposure to BTEX (vs no-BTEX). Univariate (chi-squre test and Mann–Whitney U test) and Multivariate (survey logistic regression) analysis was performed to evaluate the epidemiologic characteristics of individuals exposred to BTEX and association of cancer with BTEX exposure in comparison to no BTEX exposure.The p value of <0.05 considered statistically significant.

Results (if a Case Study enter NA)

124,162 participants were identified with BTEX exposure. Individuals with BTEX exposure were young (40 vs 51 year old), male (91% vs female: 87%), and Mexican American (92% vs Non-Hispanic Black: 89% vs Non-Hispanic White: 89% vs other Hispanic: 87%). Univariate analysis showed higher total prevalence of cancer in BTEX (9.3% vs. 1.3%; p<0.0001) compared to no BTEX. Individuals with BTEX exposure had higher prevalnece of blood cancer (0.47% vs 0.00; p<0.0001), leukemia (0.56% vs 0.00; p<0.001), and lymphoma (1.72% vs 0.39%; p<0.0001) in comparison with no exposure. Multivaritate analysis showed participants with BTEX exposure had 10% higher risk of cancer (aOR: 1.10; 95%CI: 1.10-1.10; p<0.0001) compared to no BTEX exposure. Additionally, exposure to individual components of benzene (aOR: 1.24; 95%CI: 1.24; p<0.0001), ethylbenzene (aOR: 1.08; 95%CI: 1.08-1.08; p<0.0001), and o-xylene (aOR: 1.19; 95%CI: 1.19-1.19; p<0.0001) had higher risk of cancer compared to no exposure participants.

Conclusion

Our study conclude higher risk of cancer among participants with exposure to benzene, ethylbenzene and o-xylene. Future studies are warranted to evaluate the association of various types of cancers in BTEX exposure.

Examining the association between socio-demographic factors, catheter use and antibiotic prescribing in Northern Ireland primary care: a cross-sectional multilevel analysis

Inappropriate use of antibiotics is among the key drivers of antimicrobial resistance (AMR). Antibiotic use in Northern Ireland (NI) is the highest in the UK and approximately 80% is prescribed in primary care. Little information however exists about the patient and prescriber factors driving this. We described the trend in NI primary care total antibiotic prescribing 2010–2019 and conducted a cross-sectional study using a random sample of individuals registered with an NI GP on 1st January 2019. We used multilevel logistic regression to examine how sociodemographic factors and urinary catheter use was associated with the likelihood of being prescribed an antibiotic during 2019, adjusting for clustering at GP practice and GP federation levels. Finite mixture modelling (FMM) was conducted to determine the association between the aforementioned risk factors and quantity of antibiotic prescribed (defined daily doses). The association between age and antibiotic prescription differed by gender. Compared to males 41–50 years, adjusted odds of prescription were higher for males aged 0–10, 11–20 and 51 + years, and females of any age. Catheter use was strongly associated with antibiotic prescription (aOR = 6.82, 95% CI 2.50–18.64). Socioeconomic deprivation and urban/rural settlement were not associated in the multilevel logistic analysis. GP practices and federations accounted for 1.24% and 0.12% of the variation in antibiotic prescribing respectively. FMM showed associations between larger quantities of antibiotics and being older, male and having a catheter. This work described the profile of individuals most likely to receive an antibiotic prescription in NI primary care and identified GP practice as a source of variation; suggesting an opportunity for reduction from effective interventions targeted at both individuals and general practices.

694 IMPROVING OPIATE PRESCRIBING IN OLDER ADULTS WITH HIP FRACTURES TO COMBAT THE IATROGENIC FALLOUT

Background

The number of opioid prescriptions in older patients has increased dramatically and it is recognised that opioids are the fourth most likely drug to cause preventable hospital admissions. The adverse effects of opioids occur more frequently in the geriatric population. Little is known about the impact of postoperative pain in older adults. NICE recommends paracetamol with additional opioids if there is insufficient postoperative pain relief. Multidisciplinary management with early and then daily physiotherapy is critical. We have assessed pre-morbid, immediate and prolonged use of opioids in patients following hip fracture. Local problem Pre-intervention analysis identified 79% (57/72) of all patients being discharged on opiates. At 4-months, 37% (17/46) of those were still using them. This represents 28% (17/61) of all patients.

Methods

Analysis of all patients (excluding poly-trauma) with hip fractures over the age of 60 years admitted to St Mary’s Hospital. Interventions Development of local guideline on analgesia prescribing; particularly focusing senior geriatrician led decision making. Prescribing oxycodone for first 72-hours and initially using nerve block. Avoidance of transdermal preparations and withdrawing stronger opioids prior to discharge. Clear instructions for GP’s on a stop date and need for community review. Patient information leaflet dispensed with all discharge opioid prescriptions.

Results

Post-intervention cycle; 17% (11/63) of patients were taking prescribed opioids prior to admission (similar to the pre-cohort). 52% (33/63) were discharged on opiates, down from 79%. At 4-months, of those discharged on opioids, 30% (9/30) were still using them; lower than in the first cycle (37%). Overall reduction from 28% to 16% of patients on opioids at 4-months.

Conclusion

The use of specific hip fracture analgesia guideline, senior geriatrician decision-making and support to community colleagues can reduce in-patient and community opiate prescribing, and stem the growing problem of opioid addiction, misuse and iatrogenic re-admission.

The correlated expression of COX-2 and keratin 15 in radicular cysts

Background

The expression of cyclooxygenase-2 (COX-2) and Keratin-15 (K15) in radicular cysts (RCs) is poorly understood. Identifying the expression of these two markers may modify the current treatment of RC. The objective of this study was to evaluate the expression of COX-2 and its relationship to K15 expression in the odontogenic epithelial cells of the RC.

Material and Methods

A total of 18 RCs were immunohistochemically analyzed for COX-2 and K15 expression. The cellular inflammatory reaction in the cyst wall was also assessed by measuring the percentage of inflammatory cells to the total number of cells.

Results

COX-2 expression in the odontogenic epithelium of RC was absent in 11.1 % (n=2), mild in 27.8 % (n=5), moderate in 22.2% (n=4) and strong in 38.9% (n=7). Meanwhile, K15 expression was absent in 27.8% (n=5), mild in 16.7% (n=3), moderate in 44.4% (n=8), and strong in 11.1% (n=2) of the cases. The inflammatory infiltrate was mild in 2 cases (11.1%), moderate in 6 cases (33.3%), and high in 10 cases (55.6%). Spearman’s correlation test revealed significant correlation (rho= .533; p= .023) between COX-2 and K15 expression in the odontogenic epithelium of RC. However, no correlation was noted between inflammation and expression of COX-2 (rho= 0.248, p=.321) or K15 (rho= -0.162, p= .520).

Conclusions

There is high and correlated expression of COX-2 and K15 in the odontogenic epithelium of RC. COX-2 could therefore be involved in epithelial cell differentiation of the cyst. Additionally, the expression of K15 in RC may be an indicator of epithelial cell differentiation.

Key words:Cyclooxygenase, COX-2, Keratin-15, K15, Radicular cyst.

Tyrosine kinase domain mutations in chronic myelogenous leukemia patients: A single center experience

Introduction:

Despite the impressive responses achieved with tyrosine kinase inhibitor (TKI) therapy, treatment resistance develops in 16–33% of patients of chronic myelogenous leukemia (CML). Of the BCR-ABL1 dependent mechanisms, mutations in the tyrosine kinase domain (TKD) are the commonest cause of resistance.

Material and Methods:

Allele specific oligonucleotide - polymerase chain reaction (ASO-PCR) was done for testing the six common TKD mutations, T315I, G250E, E255K, M244V, M351T, and Y253F.

Results and Conclusion:

TKD mutation study was done on 83 patients. Of these 44 (53%) were positive for one or more mutations. On analyzing specific mutations, E255K was the commonest mutation seen in 24 (29%) cases, followed by T315I in 23(28%) cases. Y253F mutation was not seen in the present study sample. In the present cohort of 83 patients, 29 (35%) cases were positive for single mutation, 12 (14%) had two mutations and 3 (4%) had three mutations.

Acceptability of Neuroscientific Interventions in Education

Researchers are increasingly applying neuroscience technologies that probe or manipulate the brain to improve educational outcomes. However, their use remains fraught with ethical controversies. Here, we investigate the acceptability of neuroscience applications to educational practice in two groups of young adults: those studying bioscience who will be driving future basic neuroscience research and technology transfer, and those studying education who will be choosing among neuroscience-derived applications for their students. Respondents rated the acceptability of six scenarios describing neuroscience applications to education spanning multiple methodologies, from neuroimaging to neuroactive drugs to brain stimulation. They did so from two perspectives (student, teacher) and for three recipient populations (low-achieving, high-achieving students, students with learning disabilities). Overall, the biosciences students were more favorable to all neuroscience applications than the education students. Scenarios that measured brain activity (i.e., EEG or fMRI) to assess or predict intellectual abilities were deemed more acceptable than manipulations of mental activity by drug use or stimulation techniques, which may violate body integrity. Enhancement up to the norm for low-achieving students and especially students with learning disabilities was more favorably viewed than enhancement beyond the norm for high-achieving students. Finally, respondents rated neuroscientific applications to be less acceptable when adopting the perspective of a teacher than that of a student. Future studies should go beyond the acceptability ratings collected here to delineate the role that concepts of access, equity, authenticity, agency and personal choice play in guiding respondents' reasoning.

115 Multi-Disciplinary Simulation Training on Delirium

Introduction

Delirium is still perceived as a “geriatric medicine competency”, despite its high prevalence across most specialties. Collective multi-disciplinary team performance in implementation of multi-component interventions is key. Simulation training incorporates the complex interplay of non-technical factors, specifically, role recognition and empowerment, inter-personal skills and teamwork that are pivotal in delivering effective delirium care.

Methods

Funding was approved by Health Education England. 2 pilot teaching sessions were arranged in the simulation ward. 3 scenarios were developed, each requiring a facilitator, an actor and three participants- a foundation-year doctor, a nurse/healthcare assistant and a therapist. Scenario 1 dealt with a patient with hypoactive delirium with focus on identification and multidisciplinary optimisation. Scenario 2 challenged participants with management of an agitated patient. Scenario 3 involved discharging a patient with resolving delirium and a reluctant relative, with emphasis on mental capacity assessment. Communication, patient risk assessment and challenging perceived role barriers were global themes. Participant feedback was captured using unstructured interviews and pre- and post-session 5-point Likert confidence scale in various learning outcomes.

Results

16 participants were included- 4 foundation year doctors, 3 therapists, 2 healthcare assistants and 7 nurses. There was an average improvement in Likert confidence scales in all measured learning outcomes. All participants would recommend the course to their colleagues (average Likert scale 4.9). Qualitative feedback appraised the course for demonstration of de-escalation communication strategies, the application of mental capacity and recognition of early discharge planning.

Conclusion

Simulation training targeted at multi-disciplinary groups is an effective way to deliver teaching on delirium. It contextualises synergistic operation of different skills and personal accountability in influencing patient management. The challenge to its potential remains its adoption as mandatory training for various disciplines involved in care of older adults and its implementation at a wider-scale, to assure cost effectiveness.

Is platelet rich fibrin a viable alternative to subepithelial connective tissue graft for gingival root coverage?

Introduction

One of the most common aesthetic concerns associated with the periodontal tissue is gingival recession. Covering the root surface exposed during the disease process with soft and hard tissue surgeries may decrease these problems. The aim of the study was to compare the clinical outcome of coronally advanced flap (CAF) procedure in root coverage with platelet-rich fibrin (PRF) or subepithelial connective tissue graft (SCTG) for the treatment of Miller's Class-I gingival recession.

Materials and Methods

The split mouth design consisted of 15 patients with a total of 30 sites with bilateral Miller's Class-I recession on anterior teeth. They were randomly assigned into PRF group (test) or SCTG group (control).

Statistical Analysis

The values obtained were tabulated and analyzed using Mann--Whitney U-test and repeated measure ANOVA test. All the statistical tests were carried out using SPSS software.

Results

It was observed that both the autogenous grafts healed without any complications and at the end of 6 months the grafts were stable and recession coverage between 88-100% was achieved.

Conclusion

CAF procedure with either PRF or SCTG were both effective in the treatment of Miller's Class-I gingival recessions. CAF with SCTG showed better root coverage than CAF with PRF. Use of PRF offered additional benefit of avoiding second surgical site. Therefore, PRF can be considered as a viable alternative to SCTG in certain cases.

National survey of UK Dermatologists demonstrates significant variation in how to obtain consent for dermatological procedures

Consent must be undertaken prior to any dermatological procedure; however, in doing this, the clinician needs to ensure consent is valid and satisfies the principles of determining material risk. We aimed to assess variations in obtaining consent in the UK and understanding of material risk through a nationally distributed survey to members of the British Society for Dermatological Surgery and British Association of Dermatologists. Of 165 responses, we found that written consent was being obtained for all procedures in 73.9% of cases and typically at the time of procedure in the operating room/theatre (78.8%). Fifty-seven per cent of respondents were not familiar with the term 'material risk' and almost one-third were not aware of the Montgomery vs. Lanarkshire ruling, which replaced the Bolam test in 2015. We would encourage readers to be aware of these changes to consent law in the UK and how it might affect their approach to obtaining consent.

Incidence of sleep problems and their mediating role on depression and anxious preoccupation in patients with resected, non-advanced cancer: data from NEOcoping study

BACKGROUND

Our study analyzes the incidence of sleep problems and their mediating role on depression and anxious preoccupation in patients with resected, non-advanced cancer.

METHODS

A multi-institutional, prospective, observational study was conducted with 750 participants of 14 hospitals in Spain. Participants' socio-demographic and clinical characteristics were collected using a standardized self-report form and using EORTC QoL-QLQ-C30, BSI, Mini-MAC questionnaires.

RESULTS

In women, sleep problems, depression and anxious preoccupation were observed in 65, 41 and 21%, respectively. In men, sleep problems, depression and anxious preoccupation were reported in 51, 29 and 61%, respectively. More sleep problems, depression and anxious preoccupation were found among women than males. Depression was a significant predictor of anxious preoccupation. In males, sleep problems partially mediated this association. This was not confirmed in women.

CONCLUSION

Our findings point toward the importance of developing interventions that decrease depression and sleep problems in cancer.

Abstract P3-07-01: IRS1 expression is required for estrogen stimulated growth in breast cancer cells

Insulin receptor substrate (IRS) proteins are adaptor proteins phosphorylated by activated type I insulin-like growth factor receptor (IGF-1R) and insulin receptor (IR). In addition to their roles in normal cell physiology, we have shown IRS expression is required for breast cancer cell growth and motility. IRS1 plays a more important role in mitogenesis and survival while IRS2 in cancer cell metastasis. Moreover, this family of adaptor proteins is also involved in the signal transduction of many other transmembrane receptors. Thus, IRS proteins could be potential cancer therapeutic targets. We have previously shown that reduced IRS1 impairs IGF and insuliln stimulated cancer cell growth and tumorigenicity even when signaling is not affected due to possible compensation of IRS2 and other adaptor proteins. To further study the role of IRS-1 function in breast cancer, we created doxycycline inducible IRS-1 shRNA cells. We also found that IRS1 knockdown significantly reduced estradiol stimulated growth. To investigate if reduced IRS1 regulated E2 stimulated binding of ERa ChIP assay was performed using the pS2 promoter. Compared to parental MCF-7L cells, inducible IRS1 knock down clone 3G5 demonstrated significantly reduced promoter binding. Degradation of IRS-1 with a pharmacologic antagonist (NT-157) also diminished ERa binding to pS2 promoter. Further qRT-PCR analysis for mRNA levels of estrogen regulated genes, such as PGR, TFF1, etc. showed those genes were significantly down regulated. To evaluate effects of IRS-1 levels on estrogen stimulated growth, we evaluated 3G5-B12 (a subclone of 3G5) cell growth in a xenograft model. 3G5-B12 cells have similar levels of IGFIR and ERa expression compared to their parent cells. Estrogen dependent xenograft growth was similar to those of parent MCF-7L cells. After doxycycline was administered in the diet, 3G5-B12 tumor growth was significantly inhibited compared to those fed with normal mouse diet, and this inhibition was prolonged at least 2 and a half months. Parental MCF-7L tumor growth was not affected by the doxycycline diet. Doxycycline inducible IRS1 knock down significantly prolonged the time before tumors reached 1000mm3 compared with those tumors on a normal diet. In conclusion, IRS-1 is required for optimal estrogen receptor function as measured by promoter binding and xenograft growth. Our data suggested suppression of IRS-1 function may target several growth pathways in breast cancer cells and represents a new drug target.

Citation Format: Zhang X, Varma S, Yee D. IRS1 expression is required for estrogen stimulated growth in breast cancer cells [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P3-07-01.

Comparative Evaluation of Efficacy of Iontophoresis with 0.33% Sodium Fluoride Gel and Diode Laser Alone on Occlusion of Dentinal Tubules

INTRODUCTION

Dentinal Hypersensitivity (DH) is one of the most commonly encountered clinical problems. Literature reveals no specific therapy to satisfactorily eliminate dentinal hypersensitivity.

AIM

The aim of this study was to assess and compare the efficacy of iontophoresis with 0.33% Sodium Fluoride (NaF) gel and diode laser alone in dentinal tubule occlusion.

MATERIALS AND METHODS

This in vitro study included 20 teeth with intact root surfaces unaltered by extraction procedure for specimen preparation. Each tooth was cleaned, air dried and cut into three sections. Total 60 sections were prepared (30 longitudinal and 30 transverse sections), which were acid etched. In control group, no treatment was carried. In iontophoresis treatment group, samples were inserted into a foam tray containing 0.33 % NaF Gel and subjected to 1.5 mA output current for three minutes. In laser treatment group, specimens were lased with 980 nm diode laser at 0.5 W/PW (62.2J /cm²) in a noncontact mode for 30 seconds. Specimens were evaluated under Scanning Electron Microscope (SEM) at 10KV to 20KV under x 2000, x5000 magnification for surface characteristics and patency of dentinal tubules. Total number of tubules visible, open, completely and partially occluded were recorded in each microphotograph and compared.

RESULTS

On comparison, laser group showed the least number of open tubules i.e., 130 (31.1%) followed by iontophoresis group, 155 (51.32%) and control group 417 (100%).

CONCLUSION

Diode laser application provided better results as compared to iontophoresis on occlusion of dentinal tubules. Hence, it can be used to treat the patients with DH.

Acute respiratory distress syndrome in disseminated tuberculosis: an uncommon association

OBJECTIVE

To analyse clinicopathological features of acute respiratory distress syndrome (ARDS) in disseminated tuberculosis (TB) at autopsy.

METHODS

A retrospective analysis of an autopsy database of disseminated TB from 1990 to 2010 was conducted. ARDS cases were assessed for histological changes of diffuse alveolar damage (DAD) and other pathological pulmonary features.

RESULTS

Disseminated TB was diagnosed in 196 cases. The clinical diagnosis of disseminated TB was made in 67% of cases. Of the 196 cases, 10 met the clinical criteria for ARDS, 60% of whom showed histological evidence of DAD. One case of DAD was diagnosed on histology alone. DAD was thus found in 7/196 cases of disseminated TB. Other pulmonary changes included necrotising granulomas (n = 10), tuberculous bronchopneumonia (n = 4), tuberculous vasculitis (n = 3), infarction (n = 1) and aspergilloma (n = 1). Histopathological diagnosis other than DAD was found in 4/10 cases and disseminated TB was presumed clinically in only 4/10 cases of ARDS.

CONCLUSION

Disseminated TB may be clinically missed and diagnosed only post mortem. Disseminated TB is a relatively uncommon cause of ARDS; however, it should always be presumed clinically as it is a potentially treatable cause. DAD is a rare histological feature of disseminated TB and there may not always be a clinicopathological correlation between ARDS and DAD.

Alpha-2 macroglobulin in Alzheimer's disease: a marker of neuronal injury through the RCAN1 pathway

Preclinical changes that precede the onset of symptoms and eventual diagnosis of Alzheimer's disease (AD) are a target for potential preventive interventions. A large body of evidence suggests that inflammation is closely associated with AD pathogenesis and may be a promising target pathway for such interventions. However, little is known about the association between systemic inflammation and preclinical AD pathophysiology. We first examined whether the acute-phase protein, alpha-2 macroglobulin (A2M), a major component of the innate immune system, was associated with cerebrospinal fluid (CSF) markers of neuronal injury in preclinical AD and risk of incident AD in the predictors of cognitive decline among normal individuals (BIOCARD) cohort. We find that A2M concentration in blood is significantly associated with CSF concentrations of the neuronal injury markers, tau and phosphorylated tau, and that higher baseline serum A2M concentration is associated with an almost threefold greater risk of progression to clinical symptoms of AD in men. These findings were replicated in the Alzheimer's Disease Neuroimaging (ADNI) study. Then, utilizing a systems level approach combining large multi-tissue gene expression datasets with mass spectrometry-based proteomic analyses of brain tissue, we identified an A2M gene network that includes regulator of calcineurin (RCAN1), an inhibitor of calcineurin, a well-characterized tau phosphatase. A2M gene and protein expression in the brain were significantly associated with gene and protein expression levels of calcineurin. Collectively these novel findings suggest that A2M is associated with preclinical AD, reflects early neuronal injury in the disease course and may be responsive to tau phosphorylation in the brain through the RCAN1-calcineurin pathway.

Ion induced dewetting of Au-Si on a SiO2 surface: composite nanodot evolution and wettability transition

A nanodot array morphology gradually develops on SiO₂ surface when a thin bi-layer of Au and Si undergoes ion irradiation. An increasing amount of gold silicide is detected as islands on the insulator surface evolve into nanodots as a function of increasing ion fluence. Different stages of evolution from islands to nanodots are found to be driven by the localized melting of Au along the ion-track and dewetting of the metal film. Dewetting is accompanied by sputter-erosion and mixing of Au and Si at the bi-layer interface due to ion energy deposition. Interestingly, a gradual transition in wettability of the surface from the hydrophilic to the hydrophobic one is observed with the growth of nanodots, which is correlated with the compositional variation. The experimental results indicate a route towards the controlled growth of composite nanodots on an insulator surface having hydrophobic properties using ion irradiation.

A Split Mouth Randomized Clinical Comparative Study to Evaluate the Efficacy of Gingival Depigmentation Procedure Using Conventional Scalpel Technique or Diode Laser

Introduction: Dark or black coloured gingiva is an esthetic concern especially in subjects with high lip line or gummy smile. Gingival depigmentation procedure is a type of perioplastic surgery where the gingival epithelium is excised with various techniques to lighten the colour of the gingiva. The aim of this study was to compare the clinical efficacy of gingival depigmentation procedure with conventional scalpel technique and diode laser application. Methods: This split mouth randomized study was conducted on 12 subjects (18-40 years of age), exhibiting melanin hyperpigmentation of gingiva. The anterior labial sextant of maxilla and mandible were divided into two halves involving three anterior teeth i.e. central incisor, lateral incisor and canine on each side. The divided areas were randomly allotted for depigmentation procedure either with scalpel technique or diode laser operating at 980 nm wavelength. Various parameters such as bleeding, pain, difficulty of procedure and wound healing were assessed and compared between the two techniques. The level of melanin pigment was assessed with Dummette Gupta index and photographic analysis with the help of adobe software. The subjects were followed up to one year to see for recurrence of melanin pigmentation. Results: Bleeding during surgery, pain score and difficulty of procedure assessed by the operator were statistically higher for scalpel technique as compared to laser technique. Wound healing did not show any statistical significant difference between both techniques. Gingival depigmentation procedures with scalpel as well as laser technique were effective when compared preoperatively and at consecutive postoperative visits, and this was statistically significant. Comparison of melanin depigmentation procedure between scalpel and laser technique did not show any significant differences at all postoperative intervals. Conclusion: The findings of the present study suggest that gingival depigmentation was effective with both scalpel and laser techniques. However, the laser treated sites showed reduced pain experienced by the patient and better operator comfort. Slight melanin repigmentation was observed in three subjects treated with scalpel depigmentation procedure at the end of one year.

Estimation and Comparison of Salivary Calcium, Phosphorous, Alkaline Phosphatase and pH Levels in Periodontal Health and Disease: A Cross-sectional Biochemical Study

INTRODUCTION

In oral diagnostics there is a great challenge to determine biomarkers for screening and evaluating the disease activity. Biomarkers can also serve as a useful tool to measure the efficacy of the therapy.

AIM

To evaluate and compare the levels of salivary calcium, phosphorous, alkaline phosphatase and pH levels in periodontally healthy subjects and patients with gingivitis and periodontitis.

MATERIALS AND METHODS

The present study consisted of 150 subjects aged between 20-45 years who were divided into three groups; periodontally healthy, gingivitis and chronic periodontitis. Prior to the clinical examination the demographic details, relevant information of the subject, gingival index, plaque index, Oral Hygiene Index (OHI) and pH were recorded. Biochemical assay of saliva i.e., inorganic calcium, phosphorous and alkaline phosphatase were estimated by colorimetric method. ANOVA and Tukey's test were applied for statistical analysis.

RESULTS

The mean levels of biomarkers studied were; inorganic calcium (12.55μg/dl), phosphorous (14.50μg/dl), alkaline phosphatase (49.62μg/dl) and pH (11.65). There was a gradual increase in these levels as the condition progressed from health to gingivitis or periodontitis which was statistically significant at p<0.001.

CONCLUSION

Based on these results, it can be concluded that, the biomarkers like salivary calcium, phosphorous, alkaline phosphatase and pH can be considered for evaluating the diagnosis and prognosis of periodontal tissues in disease and health.

A Prospective Cohort Study to Assess and Correlate the Maternal Periodontal Status with Their Pregnancy Outcome

BACKGROUND

There is an overwhelming body of evidence strongly suggesting that periodontal infection may have a significant negative impact on pregnancy outcome in some women. The aim of this study was to determine the association between periodontal disease and preterm low birth weight of babies.

MATERIALS AND METHODS

A total of 300 pregnant women, between 20 and 24 weeks of gestation i.e., second trimester, were considered for the study. The periodontal status was recorded using the following parameters: probing pocket depth, clinical attachment level, oral hygiene index and plaque index. After initial examination in the second trimester, the pregnant women were followed till delivery of the baby. Postpartum data i.e., weight of baby, gestational age of pregnancy and type of delivery, were recorded.

RESULTS

Out of 300 pregnant women, 248 women had full-term delivery (12 low birth weight and 236 normal birth weight) while 52 had preterm delivery (6 normal birth weight and 46 low birth weight). There was significant association between body mass index and level of periodontal disease severity of pregnant women with birth weight of babies, gestational age of pregnant women and mode of delivery, respectively. As the level of periodontal disease severity increased, the proportion of delivering preterm and low birth weight babies also increased.

CONCLUSION

The conclusions obtained revealed that Periodontal disease is a potential risk factor for preterm low birth weight babies of pregnant women.

Visceral Leishmaniasis in a Non-Endemic Area of India

The study included 57 patients with visceral leishmaniasis. The average duration of symptoms was 3.8 ± 3.55 months and pancytopenia was the commonest haematological abnormality. The parasite load directly correlated with the degree of anaemia at presentation (P=0.03). Splenic regression took 9.58 ±4.5 days and haematological parameters recovered in 14.5±9.07 days. There were five deaths over the five-year study duration. Leishmaniasis was not the first diagnosis in 14 patients, of whom eight were residents of non-endemic regions. Diagnosis was achieved in 13.5 days in these patients, compared to 4.5 days in patients where leishmaniasis was suspected at the outset.

Progressive Fibrosis Is Driven by Genetic Predisposition, Allo-immunity, and Inflammation in Pediatric Liver Transplant Recipients

Aim

To determine predisposing factors of idiopathic allograft fibrosis among pediatric liver transplant recipients.

Background

Protocol biopsies (PB) from stable liver transplant (LT) recipient children frequently exhibit idiopathic fibrosis. The relation between allograft inflammation, humoral immune response and fibrosis is uncertain. Also the role of HLA-DRB1 genotype has not been evaluated, though it's associated with fibrosis in autoimmune hepatitis.

Patients and Methods

This observational study, included 89 stable LT recipient transplanted between 2004–2012 with mean follow-up of 4.3 years, 281 serial PBs (3.1 biopsy/child) and human leukocyte antigen (HLA) antibody data. PBs were taken 1–2, 2–3, 3–5, 5–7, and 7–10 years post-LT, and evaluated for inflammation and fibrosis using liver allograft fibrosis score (LAFSc). The evolution of fibrosis, inflammation and related predisposing factors were analysed.

Findings

HLA-DRB1*03/04 allele and Class II DSA were significantly associated with portal fibrosis (p = 0.03; p = 0.03, respectively). Portal inflammation was predisposed by Class II DSA (p = 0.02) and non-HLA antibody presence (p = 0.01). Non-portal fibrosis wasn't predisposed by inflammation. Lobular inflammation was associated with non-HLA antibodies.

Interpretation

We conclusively demonstrated that allograft inflammation results in fibrosis and is associated with post-LT Class II DSA and non-HLA antibodies. The HLA-DRB1*03/04 allele caused genetic predisposition for fibrosis.

Funding

None.

•

There is a link between genetic predisposition, alloimmune antibodies, allograft inflammation and fibrosis

•

Description of allograft natural history by assessing evolution of inflammation, fibrosis in different histological zones

•

Allograft inflammation results in allograft fibrosis and is associated with post-LT Class II DSA and non-HLA antibodies

•

The HLA-DRB1*03/04 allele causes genetic predisposition for fibrosis

Among pediatric liver transplant recipients, the graft longevity is expected to parallel the life expectancy of the recipient. A major impediment in this is progressive allograft fibrosis, the cause of which is not well understood. If this pathogenesis could be found, then interventions to arrest the progressive fibrosis could be explored. In our 89 patients for whom we did periodic surveillance liver biopsies, inflammation was found to precede the fibrosis and associated with presence of specific antibodies. Certain genetic predisposition for higher fibrogenesis was also found, thus establishing a link between genetic predisposition, alloimmune response, inflammation, and allograft fibrosis.

The Conformation of Thermoresponsive Polymer Brushes Probed by Optical Reflectivity

We describe a microscope-based optical setup that allows us to perform space- and time-resolved measurements of the spectral reflectance of transparent substrates coated with ultrathin films. This technique is applied to investigate the behavior in water of thermosensitive polymer brushes made of poly(N-isopropylacrylamide) grafted on glass. We show that spectral reflectance measurements yield quantitative information about the conformation and axial structure of the brushes as a function of temperature. We study how parameters such as grafting density and chain length affect the hydration state of a brush, and provide one of the few experimental evidences for the occurrence of vertical phase separation in the vicinity of the lower critical solution temperature of the polymer. The origin of the hysteretic behavior of poly(N-isopropylacrylamide) brushes upon cycling the temperature is also clarified. We thus demonstrate that our optical technique allows for in-depth characterization of stimuli-responsive polymer layers, which is crucial for the rational design of smart polymer coatings in actuation, gating, or sensing applications.

PIRO concept: staging of sepsis

Introduction:

Sepsis is common presenting illness to the emergency services and one of the leading causes of hospital mortality. Researchers and clinicians have realized that the systemic inflammatory response syndrome concept for defining sepsis is less useful and lacks specificity. The predisposition, infection (or insult), response and organ dysfunction (PIRO) staging of sepsis similar to malignant diseases (TNM staging) might give better information.

Materials and Methods:

A prospective observational study was conducted in emergency medical services attached to medicine department of a tertiary care hospital in Northern India. Patients with age 18 years or more with proven sepsis were included in the first 24 hours of the diagnosis. Two hundred patients were recruited. Multivariate logistic regression analysis was done to assess the factors that predicted in-hospital mortality.

Results:

Two hundred patients with proven sepsis, admitted to the emergency medical services were analysed. Male preponderance was noted (M: F ratio = 1.6:1). Mean age of study cohort was 50.50 ± 16.30 years. Out of 200 patients, 116 (58%) had in-hospital mortality. In multivariate logistic regression analysis, the factors independently associated with in-hospital mortality for predisposition component of PIRO staging were age >70 years, chronic obstructive pulmonary disease, chronic liver disease, cancer and presence of foley's catheter; for infection/insult were pneumonia, urinary tract infection and meningitis/encephalitis; for response variable were tachypnea (respiratory rate >20/minute) and bandemia (band >5%). Organ dysfunction variables associated with hospital mortality were systolic blood pressure <90mm Hg, prolonged activated partial thromboplastin time, raised serum creatinine, partial pressure of oxygen in arterial blood/fraction of inspired oxygen (PaO₂/FiO₂) ratio <300, decreased urine output in first two hours of emergency presentation and Glasgow coma scale ≤9. Each of the components of PIRO had good predictive capability for in-hospital mortality but the total score was more accurate than the individual score and increasing PIRO score was associated with higher in-hospital mortality. The area under receiver operating characteristic curve for cumulative PIRO staging system as a predictor of in-hospital mortality was 0.94.

Conclusion:

This study finds PIRO staging as an important tool to stratify and prognosticate hospitalised patients with sepsis at a tertiary care center. The simplicity of score makes it more practical to be used in busy emergencies as it is based on four easily assessable components.