Nevin Manimala

Mar Environ Res. 2021 Apr 26;169:105339. doi: 10.1016/j.marenvres.2021.105339. Online ahead of print.

ABSTRACT

Rhodoliths (nodular calcareous red algae) are considered one of the most important bioengineers in the Mediterranean Sea, making rhodolith beds ecologically relevant ecosystems. On the insular shelf surrounding the western Pontine Archipelago (depth from 43 to 112 m), rhodolith beds were identified through the analysis of an extensive dataset of grab samples and videos to ground-truth the backscatter acoustic facies. Six acoustic facies (low backscatter, dishomogeneous low-backscatter, dishomogeneous high-backscatter, high-backscatter, rocks and high backscatter, and rocks and medium backscatter) were recognized. We studied how rhodoliths characteristics (density, morphotype, size and structure) differently influence the backscatter signature. At the western Pontine Archipelago, rhodolith beds are mainly represented by facies dishomogeneous high backscatter, high backscatter, high backscatter with rocks, and medium backscatter with rocks. The obtained results increase both the knowledge on the heterogeneous structure of such ecologically relevant benthic habitat and highlight the use of distinctive acoustic facies for their identification. Finally, the used approach could be considered a useful method for indirect detection and mapping of rhodolith beds.

PMID:33932846 | DOI:10.1016/j.marenvres.2021.105339

Environ Pollut. 2021 Mar 30;284:117035. doi: 10.1016/j.envpol.2021.117035. Online ahead of print.

ABSTRACT

Seabirds are widely used as indicators of marine pollution, including mercury (Hg), because they track contaminant levels across space and time. However, many seabirds are migratory, and it is difficult to understand the timing and location of their Hg accumulation. Seabirds may obtain Hg thousands of kilometers away, during their non-breeding period, and deposit that Hg into their terrestrial breeding colonies. We predicted that Hg concentration in rectrices reflects exposure during the previous breeding season, in body feathers reflects non-breeding exposure, and in blood collected during breeding reflects exposure during current breeding. To test this hypothesis, we measured total Hg concentration in these three tissues, which reflect different timepoints during the annual cycle of rhinoceros auklets (Cerorhinca monocerata) breeding on both sides of the North Pacific (Middleton Island in Alaska and Teuri Island in Hokkaido), and tracked their wintering movement patterns with biologging devices. We (i) identify the wintering patterns of both populations, (ii) examine Hg levels in different tissues representing exposure at different time periods, (iii) test how environmental Hg exposure during the non-breeding season affects bird contamination, and (iv) assess whether variation in Hg levels during the non-breeding season influences levels accumulated in terrestrial plants. Individuals from both populations followed a figure-eight looping migration pattern. We confirm the existence of a pathway from environmental Hg to plant roots via avian tissues, as Hg concentrations were higher in plants within the auklet colonies than at control sites. Hg concentrations of breast feathers were higher in Alaskan than in Japanese auklets, but Hg concentrations in rectrices and blood were similar. Moreover, we found evidence that tissues with different turnover rates could record local anthropogenic Hg emission rates of areas visited during winter. In conclusion, Hg was transported across thousands of kilometers by seabirds and transferred to local plants.

PMID:33932830 | DOI:10.1016/j.envpol.2021.117035

Semin Arthritis Rheum. 2021 Apr 2;51(3):565-575. doi: 10.1016/j.semarthrit.2021.03.015. Online ahead of print.

ABSTRACT

OBJECTIVE: Observational studies suggest that rheumatoid arthritis (RA) may be associated with lung cancer (LC) risk, while the evidence is inconsistent. We conducted a meta-analysis and a Mendelian randomization study to investigate the association and causality between RA and the LC risk.

METHODS: We conducted a systematic search of cohort studies and performed a meta-analysis (PROSPERO ID CRD42020159082) to calculate the relative risks (RRs) and their 95% confidence intervals (95%CIs). Subgroup analyses based on sex and initiation year of follow-up were carried out. E-values of each study were calculated to evaluate if existing studies were sensitive to unmeasured confounding. Furthermore, we investigated the correlation between genetically predisposed RA and LC risk using summary statistics from the International Lung Cancer Consortium (11,348 cases and 15,861 controls) and 90 RA-related single nucleotide polymorphisms from European and East Asian descent as instrumental variables. A two-sample Mendelian randomization (MR) analysis was performed to detect the findings based on LC and histological subtypes. Sensitivity analyses were performed to test the robustness of our findings.

RESULTS: In the meta-analysis of 11 cohort studies involving 183,888 patients, an increased risk of LC was observed among RA patients (RR = 1.44, 95%CI = 1.31-1.57). Subgroup analyses suggested that male patients have a relatively higher LC risk than female patients, and an increased incidence of LC in RA patients was found from 1950 to 2010. Conversely, in the MR analysis, we found that genetically predisposed RA was associated with a decreased risk of LC overall, while neither causally associated with the risk of lung adenocarcinoma nor squamous cell lung cancer. Nevertheless, genetically predisposed RA was associated with a decreased LC risk among the East Asian population, but not in Europeans. These results were robust against extensive sensitivity analyses.

CONCLUSION: Our meta-analysis suggested that although RA was associated with a relatively higher LC risk, the causal relationship between genetically predisposed RA and LC risk was not supported by the MR study. Further studies are warranted to elucidate the possible association between RA and the risk of LC, as well as its underlying mechanisms.

PMID:33932788 | DOI:10.1016/j.semarthrit.2021.03.015

Environ Pollut. 2021 Apr 26;285:117222. doi: 10.1016/j.envpol.2021.117222. Online ahead of print.

ABSTRACT

Since several seabird species have sexual size dimorphism, in which one sex is larger than the other, and may consume bigger prey, this size difference may affect the contamination concentration in the seabird’s tissues depending on their sex and age. In this study, mercury contamination was investigated in brown booby (Sula leucogaster) adults and juveniles during their breeding season at the Santana Archipelago, on the southeast coast of Brazil. Two hypotheses were evaluated: 1. As females consume larger prey than males due to the reverse sexual dimorphism, higher total mercury (THg) and methylmercury (MeHg) concentrations are expected in females tissues than in males; 2. Adult seabirds have more time to accumulate mercury than juveniles, so it is expected that adults will show higher THg and MeHg concentrations than juveniles in their feathers, but none in blood since the last indicates the exposure of short time (30-60 days), as it is a constantly synthesized tissue. Feathers and blood were sampled from 20 individuals of each group (males, females and juveniles). Also, 10 eggs of the brown booby and muscle tissue samples of their main prey were collected, from February to October 2018. Females and males had similar THg concentrations in the tissues with no statistical differences between sexes. Thus, the sexual size dimorphism did not influence mercury concentrations among the tissues and both genders can be used as a biomonitor. Brown booby juveniles had low THg and MeHg concentrations compared to adults due to a shorter time of exposure for mercury to bioaccumulate in their tissues. This is the first study, to the best of our knowledge, analyzing methylmercury in feathers, blood and eggs of a tropical seabird, which can be a useful baseline for future studies on the effects of contaminants on this species in tropical regions.

PMID:33932760 | DOI:10.1016/j.envpol.2021.117222

Cancer Treat Res Commun. 2021 Apr 18;27:100374. doi: 10.1016/j.ctarc.2021.100374. Online ahead of print.

ABSTRACT

INTRODUCTION: Renal cell carcinoma (RCC) accounts for 2-3% of all tumors being the most frequent solid lesion in the kidney.

OBJECTIVE: To determine what genetic alterations and immunohistochemical (IHC) of clear cell renal carcinoma (ccRCC) are associated with prognosis and tumor aggressiveness.

PATIENTS AND METHODS: Experimental analytical study with 57 patients who underwent radical and partial nephrectomy between 2005 and 2011, all with diagnosis of ccRCC and minimum post-operative follow-up of 36 months. The pathological study included IHC determination of biomarkers associated (CAIX, CAM 5.2, CD10, c-erbB-2, EGFR, HIF-1a, Ki67, MDM2, PAX-2 y 8, p53, survivin and VEGFR 1 and 2). Genetic analysis was carried out using multiplex ligation-dependent probe amplification (MLPA). Clinical data were collected and summarized using an access-type database, adding genetic analysis and IHC data of each patient’s tumor sample. IHC statistical analysis included Chi-square, Kruskal-Wallis and multivariate analysis. The genetic analysis was performed using multivariate logistic regression (normal/deletion-duplication). Significance level p<0.05.

RESULTS: Pathologic stage was: pT1 (61.8%), pT2 (32.7%); pT3-T4 (5.4%); 16.3% were pN+ and 19.3% M1. 23.6% recurred being predominantly to distance in 83.3%. 27.3% of patients died (73.3% ccCCR). CAIX (Carbonic anhydrase IX) and tumor size were associated with worse Fuhrman grade (p = 0.035; p = 0.001 respectively). Deletion-duplication of genes increased the likelihood: of death (APC, Bcl-2 and CDKN2A by 11, 7 and 4 respectively and SMAD4 reduced the probability by 88%); tumor recurrence (CDKN2A by fifteen fold and VHL reduced the probability by 87%); pT greater than 2 (CCND2, MDM2 and WT1 multiplied by 6, 7 and 9); risk of N+ (CDK4 and EBF1 by 13); distant metastases (BRCA2 and DLEU1 by 5); Fuhrman grade ≥3 (BRCA1, BRCA2 and p53 by 40, 75 and 34 respectively, while that FHIT reduced by 96%). Deletion-duplication of CDK4 and DCC increased survival by a factor of 13 and 16, while that DLEU1 and RUNX1 decreased survival time by 80%.

CONCLUSION: CAIX and tumor size are associated with increased aggressiveness. The mutations to level 5q, 9p, 11p, 12, 13q, 17, 18q and 21q are associated with more aggressive tumors and with worse survival rate.

PMID:33932757 | DOI:10.1016/j.ctarc.2021.100374

J Forensic Leg Med. 2021 Apr 27;80:102174. doi: 10.1016/j.jflm.2021.102174. Online ahead of print.

ABSTRACT

SUBJECT: The objective of this study is to determine the violence experienced by women who presented to the Emergency Department (ED) due to Intimate Partner Violence (IPV) and their previous experiences of violence.

METHOD: The descriptive study was conducted with 96 women. The data was analyzed in SPSS 17.0 statistics package program.

FINDINGS: The average age of the women is X = 35.33 ± 11.72, 35.4% of them are in the 31-40 age group, 69.6% are married, 44.8% are high school graduates, 60.4% are unemployed. It was determined that women who were IPV victims were exposed to violence by being beaten (punching, kicking etc.) at the highest rate (82.3%), and nearly half of them (47.9%) were injured in the head and neck regions. The vast majority of women (86.5%) have been subjected to violence before, only %13.5 of them stated that they experienced violence for the first time. It was found that the majority of women (69.8%) continued to live with the perpetrator after violence. Only three of the women (3.4%) attempted to initiate legal action, and the majority (76.5%) did not intend to take legal action.

CONCLUSIONS: Healthcare professionals should be aware that most woman presenting to the ED with IPV has a history of violence before it, and that this will probably not be the last. Healthcare professionals should also consider the fact that the victims may be exposed to different types of violence at the same time. It is also recommended that healthcare professionals be trained on policies regarding IPV management and equipped to provide women with the right way out.

PMID:33932741 | DOI:10.1016/j.jflm.2021.102174

Int J Law Psychiatry. 2021 Apr 28;76:101686. doi: 10.1016/j.ijlp.2021.101686. Online ahead of print.

ABSTRACT

The attribution of criminal responsibility in the context of substance intoxication is a matter of controversy in forensic psychiatry. In 2011, the Supreme Court of Canada ruled that Tommy Bouchard-Lebrun was guilty in the straightforward case of a crime committed while in a state of substance-induced psychosis by an individual without a history of mental disorder. However, the ruling may since have served as a precedent also for settling cases where an offence is committed while in a certain state of intoxication and where there is much more diagnostic uncertainty. The goal of our research was to study the impact of the Bouchard-Lebrun Supreme Court decision on rates of criminal responsibility judgements and toxic psychosis diagnosis in the context of such cases. Applying a time-trend ecological study design, we conducted a chart review of every patient treated at the forensic unit of the Malartic Psychiatric Hospital in northern Quebec in the short periods pre- and post-ruling. We then determined the proportion of patients judged not criminally responsible and the proportion diagnosed with substance-induced psychosis. We ran chi-squared tests on the two sets of dichotomous variables. In the period following the Bouchard-Lebrun ruling, a statistically significant decrease was observed in the proportion of individuals judged not criminally responsible, as was a statistically significant increase in the proportion of individuals diagnosed with substance-induced psychosis. The findings suggest that the Bouchard-Lebrun ruling may have had an impact on subsequent forensic psychiatry decision-making and treatment at the Malartic Hospital.

PMID:33932740 | DOI:10.1016/j.ijlp.2021.101686

Gen Hosp Psychiatry. 2021 Apr 22;71:43-46. doi: 10.1016/j.genhosppsych.2021.04.005. Online ahead of print.

ABSTRACT

OBJECTIVE: The goal is to assess the feasibility of conducting unattended (type II) sleep studies before surgical aortic valve replacement (SAVR) to examine the relationship between baseline sleep measures and postoperative delirium.

METHODS: This single-site study recruited 18 of 20 study referrals with aortic stenosis undergoing first lifetime SAVR. Subjects completed a home-based type II sleep study. Delirium was assessed postoperative days 1-5. Exact logistic regression was used to determine whether sleep efficiency or apnea/hypopnea index predicts delirium.

RESULTS: Of 18 study participants, 15 successfully completed a home sleep study (mean age: 71.7 +/- 8.1 years old; 10 male subjects). Five subjects (33.3%) developed delirium. Preliminary analyses found that greater sleep efficiency was associated with a large reduction in delirium odds but was not statistically significant (OR = 0.31, 95% CI: 0.06, 1.03, p = 0.057). The point estimate of the relationship between apnea/hypopnea index and delirium was not similarly sizeable (OR 1.10, 95% CI: 0.35, 3.37, p = 0.85).

CONCLUSIONS: Our findings suggest that home type II sleep studies before SAVR are feasible, and they support adequately powered studies investigating type II home sleep studies as a predictor of postoperative delirium and other important postsurgical outcomes.

PMID:33932735 | DOI:10.1016/j.genhosppsych.2021.04.005

J Clin Anesth. 2021 Apr 28;72:110310. doi: 10.1016/j.jclinane.2021.110310. Online ahead of print.

ABSTRACT

STUDY OBJECTIVE: To clarify whether intraoperative hypotension contributes to the development of postoperative cognitive dysfunction.

DESIGN: A systematic review of prospective studies reporting on intraoperative hypotension and postoperative cognitive dysfunction in elective, non-cognitive impaired, adult surgical patients. PubMed, EMBASE and the Cochrane Library were searched up to the 1st of January 2021.

SETTING: Studies had to use a clear definition of hypotension, although differing definitions were accepted. Neurocognitive tests to determine postoperative cognitive dysfunction had to be done pre- and postoperatively, with a minimum follow-up of seven days postoperatively.

MEASUREMENTS: Risk of bias was assessed using the Cochrane Risk of Bias Tool 2.0 for randomized controlled trials and the Newcastle-Ottawa Scale for cohort studies.

MAIN RESULTS: Out of 941 studies screened, five randomized controlled trials and four cohort studies were included for qualitative analysis. Extensive methodological differences between studies were present hindering proper quantitive analysis. No studies reported statistically significant differences in incidence of postoperative cognitive dysfunction in hypo- compared to normotensive patients. Five studies reported exact incidences of postoperative cognitive dysfunction.

CONCLUSIONS: This systematic review showed no conclusive association between intraoperative hypotension and the development of postoperative cognitive dysfunction. Given the vast methodological differences of the included studies, the role of intraoperative hypotension in the development of postoperative cognitive dysfunction remains uncertain. Future research into the association between intraoperative hypotension and postoperative cognitive dysfunction should be conducted in a standardized manner.

PMID:33932723 | DOI:10.1016/j.jclinane.2021.110310

Appl Radiat Isot. 2021 Apr 24;174:109744. doi: 10.1016/j.apradiso.2021.109744. Online ahead of print.

ABSTRACT

¹³³Ba has been standardised by direct measurements for the first time in the laboratory using two counting systems: (i) the 4πβ (plastic scintillator) -γ coincidence, (ii) the 4πβ (proportional counter) -γ coincidence. Furthermore, this standardisation experiment demonstrates the performance and applicability of the recently developed 4πβ (plastic scintillator)-γ coincidence system for radionuclides decaying with complex decay schemes as well as for e, X-γ emitters. Additionally, ¹³³Ba solution standards were prepared to calibrate the pressurized 4π γ ionisation chamber and determination of the calibration coefficient. The E_n score is a statistical indicator of the agreement between two independent estimations. Thus, the performance of the PS system was compared to the result obtained with the PC system using the E_n score as specified in the ISO13528:2015. The results of measurements are acceptable if E_n ≦ 1.0. An E_n score of 0.2 was obtained which indicates that, the ¹³³Ba activity concentration obtained by the 4πβ (plastic scintillator) -γ coincidence and 4πβ (proportional counter) -γ coincidence systems are in agreement. This paper presents the standardisation procedure, the results obtained by the measurements and their comparison.

PMID:33932690 | DOI:10.1016/j.apradiso.2021.109744