Enhancing functional expression of L-glycerophosphate oxidase in Escherichia coli by controlling the expression rate
Published on: 4th July, 2022
OCLC Number/Unique Identifier: 9632289800
Heterologous expression of proteins often pursues high expression levels, but it can easily result in misfolding and loss of biological function. L-α-glycerophosphate oxidase (GlpO) is a flavin adenine dinucleotide (FAD)-dependent oxidase which is widely used in the clinical determination of triglycerides. We found that the total enzymatic activity of GlpO expressed in Escherichia coli (E. coli) was extremely low, probably due to the absence of FAD cofactors and the misfolding of GlpO at a high synthesis rate. Therefore, decreasing the expression rate was used to improve the activity of GlpO. The specific activity of GlpO expressed on the pUC19 vector with lac promotor was approximately 30 times higher than that expressed on the pET28a vector with T7 promotor, but the expression levels of GlpO on the two vectors were completely opposite. It indicated that the specific activity of GlpO was increased as the expression level decreased. However, too low expression greatly influences the total amount and activity of the functional enzyme. In order to resolve this problem, two new plasmids, GlpO-CG4 and GlpO-CG6, were constructed by inserting 4 or 6 nucleotides, respectively, between the ribosome binding site (RBS) and the start code (ATG) on pET28a. Compared with the expression on the GlpO-pET vector, the expression rates of GlpO on the GlpO-CG4 and GlpO-CG6 were dramatically decreased. The total activity of GlpO expressed on GlpO-CG6 was 11 times and 1.5 times higher than that expressed on the GlpO-pET and GlpO-pUC, respectively. Results suggest that the activity of GlpO can be improved by decreasing the expression rate.
Addiction and leadership: How authentic and transformative leaders are emerging from the adversity of substance use disorder
Published on: 7th July, 2022
OCLC Number/Unique Identifier: 9575224206
Objectives: This novel study explores the leadership traits held by people with substance use disorder. The purpose of this study is to help advance understanding of the positive qualities people with substance use disorder possess which can produce positive societal and organizational benefits once that person enters recovery. Additionally, this understanding can provide insight into effective treatment approaches that incorporate personal attributes that are present within active addiction. Methods: A qualitative methodology was used which included semi-structured interviews, observations, and a focus group which allowed the researcher to conduct a thematic coding analysis. The participants came from diverse backgrounds and included participants from multiple regions across the United States. Leadership was defined as having various dimensions of effective leadership that are found in both Transformational and Authentic Leadership Theories. Results: The findings revealed that people in addiction possess numerous leadership traits which position them for effective leadership and are further enhanced during their recovery journey. The top three traits which emerged from the data indicate that people in recovery from addiction are authentic, tenacious, and empathetic. Additionally, those in recovery have strong abilities to empower and inspire others and demonstrate posttraumatic growth which helps establish significant bonds of trust and commitment among followers. Conclusion: The impact of this study will change how people view addiction. Identifying the hidden treasures of leadership which are present in those struggling with addiction could illuminate recovery pathways that help identify purpose and value. This would not only advance treatment opportunities but greatly assist organizations that need strong leadership. People with substance use disorder have all the right tools to become effective leaders, and this understanding can help mitigate the stigma associated with addiction and paint it in a more positive light.
Endoscopic treatment of pancreatic diseases via Duodenal Minor Papilla: 135 cases treated by Sphincterotomy, Endoscopic Pancreatic Duct Balloon Dilation (EPDBD), and Pancreatic Stenting (EPS)
Published on: 8th July, 2019
OCLC Number/Unique Identifier: 8175469767
Treatments via the minor papilla is effective where the deep cannulation via the major papilla is impossible in such cases as [1] the Wirsung’s duct is inflammatory narrowed, bent or obstructed by impacted stones [2] pancreatic duct divisum (complete or incomplete) [3], maljunction of pancreatico-biliary union with stones [4], pancreatic stones in the Santorini’s duct. In [1,2] cases, the pancreatic juice flow via the major papilla decreases, while that of the minor papilla increases. Then the size of minor papilla and its orifice shows corresponding enlargement. This substitutional mechanism is an advantage when undertaking our new method. Since the pancreatic juice flow is maintained via the minor papilla in these cases, accurate and careful endoscopic skills are necessary to prevent pancreatitis due to the occlusion of the Santorini’s duct after this procedure. We have experienced 135 cases treated via minor papilla in these 27 years, so we would like to report about its safety and efficacy.
Psychological distress in a social media content moderator: A case report
Published on: 12th October, 2020
OCLC Number/Unique Identifier: 8683061313
The expansion of social media platforms has given birth to a specific professional category in charge of « sanitizing » social media and keeping it free of “inappropriate” content. These content moderators, as a result of being constantly exposed to potentially traumatic images, may be at risk of developing stress-related symptoms. Here we present the case of a social media content moderator who experienced intrusive images, anxiety symptoms and insomnia.
Literature about this subject is very scarce, while the need is increasing to assess this phenomenon and set up strategies of monitoring, counseling and treating this category of workers.
Key points
The expansion of social media platforms has given birth to a specific professional category: content moderators.
As a result of being constantly exposed to potentially traumatic images, content moderators may be at risk of developing stress-related symptoms.
The need is increasing to assess this phenomenon and set up strategies of monitoring, counseling and treating this category of workers.
Inter-Observer Variability of a Commercial Patient Positioning and Verification System in Proton Therapy
Published on: 6th February, 2017
OCLC Number/Unique Identifier: 7286354964
Purpose:Accurate patient positioning is crucial in radiation therapy. To fully benefit from the preciseness of proton therapy, image guided patient positioning and verification system is typically utilized in proton therapy. The purpose of this study is to evaluate the inter-observer variability of image alignment using a commercially available patient positioning and verification system in proton therapy.
Methods:The VeriSuite patient positioning and verification system (MedCom GmbH, Darmstadt, Germany) provides a six degrees of freedom correction vector by registering two orthogonal x-ray images to digitally reconstructed radiograph (DRR) images that are rendered in real time from the planning computed tomography (CT) images. Six cases of various disease sites, including brain, head & neck, lung, prostate, pelvis, and bladder, were used in this study. For each case, the planning CT images and a daily orthogonal x-ray portal image pair were loaded into the VeriSuite system. The same set of x-ray images and CT images for each case were reviewed and aligned separately by each of the 10 radiation therapist, following the clinical procedure for the corresponding disease site. The resulting correction vectors were then recorded and analyzed.
Results:Our study shows that the inter-observer variation (One standard deviation) in image alignment using the VeriSuite system ranged from 1.2 to 2.0 mm for translational correction and from 0.6 to 1.3 degrees for rotational correction for the six cases. The use of fiducial markers for prostate patient alignment achieved the least inter-observer variation while the bladder case produced the largest.
Conclusions:Inter-observer variation in image alignment could be relatively large, depending on the complexity of patient anatomy, image alignment approach, and user experience and software limitations. Automatic registration and fiducial markers could potentially be used to align patient more accurately and consistently. To ensure adequate tumor coverage in proton therapy, inter-observer variability in patient alignment should be carefully evaluated and accounted for in patient setup uncertainty analysis and treatment planning margin determination.
Urine Leak Following Kidney Transplantation: An Evidence-based Management Plan
Published on: 2nd October, 2018
OCLC Number/Unique Identifier: 7869210591
Care of kidney transplant recipient remains complex and long-term graft survival is not seen in every transplant recipient. Due to reduced supply and increased demand of human organs, more transplants are carried out using marginal grafts on emergency lists. Transplant recipients have altered physiology due to known end-stage renal disease, recent surgery and the use of potent analgesic and immunosuppressive medications. Amongst the known surgical complications, urine leak remains the most common. It can result from poor graft preparation due to excessive peri ureteric or lower pole dissection or damage to lower polar artery resulting in ischemic necrosis. In addition, poor surgical technique, bladder outflow obstruction, iatrogenic injury to bladder or renal pelvis may contribute to urine leak. Ongoing urine leak may manifest itself as swelling, pain, high drain output, sepsis, ileus and eventual graft loss. Early identification, localisation and quantification of leak remain essential in management of these patients. In addition, sepsis should be identified and treated promptly as these patients are highly susceptible to infections. Early recognition of this complication can significantly reduce hospital stay, improve quality of life and reduce graft loss and mortality. In this article, we aim to develop an evidence-based management approach to a patient with urine leak using a clinical scenario.
Patients’ satisfaction and associated factors towards nursing care in Dessie Referral Hospital, Northeast Ethiopia
Published on: 29th November, 2019
OCLC Number/Unique Identifier: 8875583474
Introduction: A patient satisfaction is considered as one of the desire outcomes of health care and it is directly related with utilization of health services. However, its level is falls at the fundamental level in developing countries including Ethiopia.
Objective: To assess the level of patients’ satisfaction and its associated factors at Dessie Referral Hospital, Northeast Ethiopia
Methods and Materials: An institutional based cross-sectional study design was employed from May 1 to June 1 2019. A total of 374 patients were selected by using systematic sampling technique and interviewer administer structured questionnaire was used to collect data. After data collection, the data were checked for its completeness and entered into Epi data version 3.1. The data were presented in frequency distribution tables and graphs. Both bivariable and multivariable logistic regression were applied to identify factors at a p < 0.05.
Result: Among total study participants, 220 (58.8%) patients were satisfied with nursing care service. Patients who had particular nurse for nursing care were more likely satisfied than those who didn’t have particular nurse for nursing care (AOR = 2.01, 95% CI: 1.212 - 3.334). Patients who had other diseases in addition to current health problem were more likely satisfied (AOR = 0.45 & 95% CI: 0.196 - 1.031) compared with patients who had not.
Conclusion: In this finding, the level of patients’ satisfaction towards nursing care was low. Having specific or particular nurse and presence of comorbid disease were factors associated with patients’ satisfaction towards nursing care. Health institutions should assign particular nurses for patients to improve their satisfaction and quality of care. In addition, nurses should give great attention to their patients who have co-morbid illnesses.
Usefulness of foot-to-foot bioimpedance analysis for assessing volume status in chronic hemodialysis patients at the Aristide Le Dantec University Hospital (Senegal)
Published on: 20th July, 2021
OCLC Number/Unique Identifier: 9198815507
Introduction: Determination of dry weight is one of the daily goals to achieve in hemodialysis. The aim of this study was to validate the use of bioelectrical impedance analysis (BIA) in estimation of dry weight in a population of Senegalese chronic hemodialysis patients.
Patients and methods: A 9-week cross-sectional study was carried out at the hemodialysis unit of Aristide Le Dantec University Hospital. Adult patients with no previous hospital history were included. The total body water (TBW) was measured with a single frequency bioelectric impedance foot-to-foot analyzer, before and after six successive hemodialysis sessions. These results were compared with those from clinical measurements with the Watson equation using a Student’s t-test and Bland-Altman analysis.
Results: 264 measurements were made in 22 patients (46.6 years, 54.5% men, 92.3 months on dialysis, 62.7 kg mean dry weight). A significant reduction in weight (ΔWeight = 2.0 ± 1.1 kg; p < 0.0001) and in TBW measured by the BIA (ΔTBWBIA = 3.3 ± 1.0 liters; p < 0.0001)) or calculated by Watson’s equation (ΔTBWWatson = 0.5 ± 0.2 liter; p = 0.0001) was observed. There was a strong linear correlation and agreement between the 2 TBW measurements in pre-dialysis. In post-dialysis the concordance diagram indicated a bias = –2.2 and wide agreement limits.
Conclusion: The BIA allows reproducible and reliable measurements and a fair estimate of the TBW in pre-dialysis.
Recent approach to incorporate tellurium in metal carbonyl cluster utilizing extrusion reaction
Published on: 26th November, 2019
OCLC Number/Unique Identifier: 9269425535
The incorporation of tellurium into metal carbonyl using tellurium transfer/ extrusion reaction is presented in this work. The results bring one of the new ways to incorporate tellurium by transferring it from one molecule to another molecule, in comparison to the work so far where either insertion or extrusion reactions were shown. The reactions of PhC2TeC2Ph with the metal carbonyl cluster produced thermodynamically stable metal carbonyl tellurium clusters.
Effectiveness of prenatal intensive counselling on knowledge, attitude and acceptance of post placental intrauterine contraceptive device among mothers
Published on: 27th March, 2020
OCLC Number/Unique Identifier: 8573348290
Introduction: Contraception is a method or device used to prevent pregnancy. In the first year of postpartum period around 65% of women are having unmet need of family planning. Post Placental Intrauterine Contraceptive Device is not only advantageous to the women and couples; even the service providers benefit from PPIUCD. PPIUCD insertion on the same delivery table saves time and separate clinical procedure is not required.
Methodology: The Quantitiative Pre-Experimental One Group Pre and Post Test research design was used. 70 Antenatal mothers were selected by using Purposive Sampling Technique who fulfilled the inclusion criteria and who were available during the period of data collection at selected hospital, Puducherrry. Data was collected by using Structured Interview Schedule.
Result: The Pre test mean score of Knowledge was 9.98 ± 2.38 and Post Test mean score of Knowledge was 14.91 ± 1.15. The calculated paired‘t’ value was (-20.82) found to be statistically significant at p < 0.001 level. The Pretest mean score of Attitude was 34.67 ± 5.67 and Post test mean score of Attitude was 44.27 ± 4.70. The calculated paired‘t’ value was (-17.25) found to be statistically significant at p < 0.001 level. The Pretest mean score of Acceptance was 0.11 ± 0.320 and Post Test mean score of Acceptance was 0.29 ± 0.455. The paired‘t’ value of t = -3.778 found to be statistically significant at p < 0.001 level. The Demographic and Obstetrical Variables like age at marriage, previous childbirth and decision maker of family about family planning have shown significant association with Post Test level of Knowledge, Attitude and Acceptance of PPIUCD at p < 0.05 and p < 0.001.
Conclusion: The researcher concluded that Prenatal Intensive Counselling increases the mother’s Knowledge, Attitude and Acceptance of PPIUCD. So Prenatal Intensive Counselling on PPIUCD can be given to Antenatal Mothers during their antenatal visits to meet the unmet needs of family planning.
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