Nevin Manimala

Pharmaceutics. 2023 Feb 14;15(2):645. doi: 10.3390/pharmaceutics15020645.

ABSTRACT

Prediction of compatibility of the active pharmaceutical ingredient (API) with the polymeric carrier plays an essential role in designing drug delivery systems and estimating their long-term physical stability. A key element in deducing API-polymer compatibility is knowledge of a complete phase diagram, i.e., the solubility of crystalline API in polymer and mutual miscibility of API and polymer. In this work, the phase behavior of ibuprofen (IBU) with different grades of poly(D,L-lactide-co-glycolide) (PLGA) and polylactide (PLA), varying in composition of PLGA and molecular weight of PLGA and PLA, was investigated experimentally using calorimetry and computationally by the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state (EOS). The phase diagrams constructed based on a PC-SAFT EOS modeling optimized using the solubility data demonstrated low solubility at typical storage temperature (25 °C) and limited miscibility (i.e., presence of the amorphous-amorphous phase separation region) of IBU with all polymers studied. The ability of PC-SAFT EOS to capture the experimentally observed trends in the phase behavior of IBU-PLA/PLGA systems with respect to copolymer composition and molecular weight was thoroughly investigated and evaluated.

PMID:36839967 | DOI:10.3390/pharmaceutics15020645

Pharmaceutics. 2023 Feb 11;15(2):608. doi: 10.3390/pharmaceutics15020608.

ABSTRACT

Bone-specific functionalization strategies on liposomes are promising approaches to delivering the drug in osteoporotic conditions. This approach delivers the drug to the bone surface specifically, reduces the dose and off-target effects of the drug, and thereby reduces the toxicity of the drug. The purpose of the current research work was to fabricate the bone-specific peptide conjugated pegylated nanoliposomes to deliver anabolic drug and its physicochemical evaluations. For this, a bone-specific peptide (SDSSD) was synthesized, and the synthesized peptide was conjugated with a linker (DSPE-PEG2000-COOH) to obtain a bone-specific conjugate (SDSSD-DSPE). Purified SDSSD-DSPE was characterized by HPLC, Maldi-TOF, NMR, and Scanning Electron Microscope/Energy Dispersive Spectroscopy (SEM/EDS). Further, peptide-conjugated and anabolic drug-encapsulated liposomes (SDSSD-LPs) were developed using the ethanol injection method and optimized by Central Composite Design (CCD) using a statistical approach. Optimized SDSSD-LPs were evaluated for their physicochemical properties, including surface morphology, particle size, zeta potential, in vitro drug release, and bone mineral binding potential. The obtained results from these studies demonstrated that SDSSD-DSPE conjugate and SDSSD-LPs were optimized successfully. The particle size, % EE, and zeta potential of SDSSD-LPs were observed to be 183.07 ± 0.85 nm, 66.72 ± 4.22%, and -25.03 ± 0.21 mV, respectively. SDSSD-LPs demonstrated a sustained drug release profile. Further, the in vitro bone mineral binding assay demonstrated that SDSSD-LPs deliver the drug to the bone surface specifically. These results suggested that SDSSD-LPs could be a potential targeting approach to deliver the anabolic drug in osteoporotic conditions.

PMID:36839930 | DOI:10.3390/pharmaceutics15020608

Physiol Meas. 2023 Feb 24. doi: 10.1088/1361-6579/acbf00. Online ahead of print.

ABSTRACT

OBJECTIVE: The aim of the study is to investigate the effect of the signal sampling frequency and low-pass filtering on the accuracy of the localisation of the fiducial points of the photoplethysmographic signal (PPG), and thus on the estimation of the blood pressure (i.e. the accuracy of the estimation).

APPROACH: Statistical analysis was performed on 3,799 data samples taken from a publicly available database. Four PPG fiducial points of each sample signal were examined in the study.

MAIN RESULTS: Simulation suggests that for noise-free data, cubic spline interpolation causes the sampling frequency (in the considered range of 62.5-500 Hz) to have only limited influence on localisation of the fiducial point. Better results were obtained for the pulse transit time (PTT) than pulse arrival time (PAT) approach. The acceptable filter band depends on the selected fiducial point and PAT or PTT approach. The best results were obtained for the tangent fiducial point.

SIGNIFICANCE: The presented results make it possible to estimate the minimum requirements for the sampling frequency and filtering of the PPG signal in order to obtain a reliable estimation of blood pressure.

PMID:36827709 | DOI:10.1088/1361-6579/acbf00

J Geriatr Phys Ther. 2023 Feb 24. doi: 10.1519/JPT.0000000000000379. Online ahead of print.

ABSTRACT

BACKGROUND AND PURPOSE: Despite being associated with serious adverse outcomes, such as mortality, sarcopenia remains largely undiagnosed in older individuals. This study aimed to assess the awareness, practices, and barriers and enablers to clinical implementation of sarcopenia diagnosis and treatment among geriatric rehabilitation health care professionals in the Netherlands.

METHODS: As part of EMPOWER-GR, a cross-sectional survey among geriatric rehabilitation health care professionals working in the Netherlands was undertaken between September 23, 2020, and January 28, 2021. Professionals were recruited via a geriatric rehabilitation care provider, health care professional associations, professional networks of the research team, and social media. Descriptive statistics were used to assess the study outcomes.

RESULTS AND DISCUSSION: Of the 501 geriatric rehabilitation health care professionals, 12.2% were physicians, 23.0% physical therapist/occupational therapists, 30.3% dietitians, 19.6% nurses, and 11.0% health care assistants. The concept of sarcopenia was known by 83.8% of the participants, 92.5% correctly identified sarcopenia as low muscle mass and strength (and low physical performance), and 73.8% identified sarcopenia as very important in the management of older adults admitted for rehabilitation. Although 26.2% and 18.9% of the participants reported screening and diagnosing sarcopenia, respectively, in their current practice, only 3.0% adequately used the (revised) definition of the European Working Group on Sarcopenia in Older People. When sarcopenia has been diagnosed, 65.0% reported initiating treatment consisting of resistance exercise training (78.7%), food fortification/high-energy or protein diet (85.4%), and oral nutritional supplements (70.4%). Most important barriers to screening and diagnosis were lack of knowledge, access to tools, and equipment and time, while enablers were protocol implementation, access to training, and clear responsibilities.

CONCLUSIONS: Sarcopenia awareness is high among geriatric rehabilitation health care professionals in the Netherlands, but adequate screening and diagnosis is almost nonexistent in current clinical practice, which hampers interventions. Better knowledge, clear responsibilities, and access to tools and protocols, as well as prioritization, are needed for sarcopenia to be diagnosed and treated in geriatric rehabilitation in the Netherlands.

PMID:36827678 | DOI:10.1519/JPT.0000000000000379

Pharmacy (Basel). 2023 Feb 5;11(1):30. doi: 10.3390/pharmacy11010030.

ABSTRACT

This study aimed to assess third-year student pharmacists’ perspectives regarding a virtually delivered research proposal course. A 23-item questionnaire was distributed to third-year student pharmacists enrolled in a research proposal course over three weeks in April 2021. The questionnaire contained 15 Likert-scale items, seven descriptive items, and a free-text item for additional comments about the course. Items were summarized using descriptive statistics. Fifty-four student pharmacists (response rate = 40.9%) participated in the survey. The student pharmacists surveyed generally had a positive perception of the virtually delivered research proposal course with median scores ≥ 4 (indicating agreement) for the majority (13/15) of survey items. Students did not agree that there was no difference in their motivation to succeed in the virtual course versus an in-person course and did not agree that they were more likely to pursue a career that involves undertaking a research project. This study found that student pharmacists generally had a positive perception of a virtually delivered research proposal course. These findings offer some support for the provision of an online, virtually delivered research proposal course for student pharmacists. Further research with a larger sample of students from multiple pharmacy schools is needed to improve the generalizability of the results.

PMID:36827668 | DOI:10.3390/pharmacy11010030

Pharmacy (Basel). 2023 Jan 24;11(1):23. doi: 10.3390/pharmacy11010023.

ABSTRACT

People who are diagnosed with treatment resistant schizophrenia (TRS) are likely to have clozapine as a therapeutic management option. There is a high prevalence of metabolic syndrome in patients receiving clozapine. To mitigate against this, monitoring of weight, waist circumference, lipid profile, glycated haemoglobin (HbA1c), fasting blood glucose (FBG) and blood pressure (BP) is recommended. The aims of this study were to examine the prevalence of metabolic syndrome and whether any variables were correlated with its development, and to highlight any opportunities for the pharmacist to offer support. This study was conducted in an urban hospital and its associated Clozapine Clinic in Cork, Ireland. A retrospective audit assessed the prevalence of metabolic syndrome using the International Diabetes Federation (IDF) criteria. Patients were eligible for inclusion if they were aged 18 years or more, registered with the Clozapine Clinic, and had the capacity to provide informed consent. All data were entered into Microsoft^® Excel ^® (Microsoft Corporation) and further statistical analysis was undertaken using R, t-tests, Fisher’s Exact Test and Mann-Whitney U tests as appropriate, and p ≤ 0.05 was considered statistically significant. Of 145 patients (32% female; mean age (SD) 45.3 (±11.7) years; 86.2% living independently/in family home), nearly two thirds (n = 86, 59.3%) were diagnosed with metabolic syndrome. The mean age of participants with metabolic syndrome was 44.4 years (SD = 10.8), similar to the 46.6 years (SD = 12.8) for those without. Variables that were identified to be statistically significantly associated with metabolic syndrome included waist circumference, weight, triglycerides, high density lipoprotein-cholesterol (HDL-C), BP, FBG and HbA1c. The high incidence of metabolic syndrome in this patient population highlights the need for continued physical health monitoring of these patients to ameliorate the risk of developing metabolic syndrome.

PMID:36827661 | DOI:10.3390/pharmacy11010023

Pharmacy (Basel). 2023 Jan 23;11(1):21. doi: 10.3390/pharmacy11010021.

ABSTRACT

BACKGROUND: As roles have evolved over time, changes in workplace environments have created higher patient expectations creating stressful conditions for pharmacists.

AIM: To evaluate pharmacists’ perceptions of their working conditions, work dissatisfaction, and psychological distress; determine their predictors in New Zealand (NZ); and compare results with Canadian studies and historic NZ data.

METHODS: A cross-sectional online survey was distributed to registered pharmacists in NZ. The survey included demographics, work satisfaction, psychological distress, and perceptions of their working conditions (six statements with agreement rated on a 5-point Likert scale). Comparisons were made with surveys from Canada and NZ. Chi-square, t-tests, and non-parametric statistics were used to make comparisons.

RESULTS: The response rate was 24.7% (694/2815) with 73.1% practicing in a community pharmacy (45.8% independent, 27.3% chains). Pharmacists disagreed on having adequate time for breaks and tasks, while the majority contemplated leaving the profession and/or not repeating their careers again if given the choice. Working longer hours and processing more prescriptions per day were predictive factors for poorer job satisfaction. More NZ pharmacists perceived their work environment to be conducive to safe and effective primary care (57% vs. 47%, p < 0.001) and reported that they had enough staff (45% vs. 32%, p = 0.002) as compared to Canadian pharmacists. Pharmacists’ job satisfaction and psychological distress have not improved compared to the assessment 20 years prior.

CONCLUSIONS: NZ pharmacists perceive working conditions to be sub-optimal yet had higher satisfaction than their Canadian counterparts. Work dissatisfaction and psychological distress are high and have not improved over the last two decades.

PMID:36827659 | DOI:10.3390/pharmacy11010021

J Geriatr Phys Ther. 2023 Feb 24. doi: 10.1519/JPT.0000000000000380. Online ahead of print.

ABSTRACT

BACKGROUND AND PURPOSE: Mobility disability is the most prevalent form of disability for older adults in the United States. A physical therapy mobility checkup (MC) under development is a patient-centered preventative physical therapy visit. It includes physical performance testing and education on physical performance as a valuable and modifiable health indicator. The purpose of this study was to identify the proportion of older adults willing to participate in an MC, the age at which they would initiate care, their desired frequency of participation, and the characteristics, or attributes, of the MC they preferred.

METHODS: In a cross-sectional study conducted at the Minnesota State Fair, adults older than 55 years answered survey questions about preventative health practices and completed a discrete choice experiment (DCE) to determine their preferences for the MC. Attributes studied in the DCE were visit duration, checkup content, education, and possible outcomes of participating in preventative care for mobility. Descriptive statistics characterized demographic information and survey responses. Conjoint choice modeling estimated the main effect for each DCE attribute.

RESULTS AND DISCUSSION: One hundred sixty-six older adults participated in the study. Seventy-eight percent indicated that they would choose an MC if available. Most participants (66%) believed that MCs should occur before 60 years of age and at least annually (68%). A 30-minute visit duration, which accounted for 84% of attribute importance, was preferred. Balance, the preferred content of the MC, accounted for 12% of the attribute importance. Preferences for educational content and possible outcomes of participation with preventative care aimed at preventing mobility loss were not statistically significant.

CONCLUSION: Older adults value preventative care for reducing mobility disability. They identified time efficiency and the inclusion of measures to assess balance as priorities for this preventative physical therapy visit.

PMID:36827654 | DOI:10.1519/JPT.0000000000000380

Ocul Immunol Inflamm. 2023 Feb 24:1-5. doi: 10.1080/09273948.2023.2183412. Online ahead of print.

ABSTRACT

PURPOSE: Birdshot chorioretinitis (BSCR) is a form of posterior uveitis that is classically characterized by hypopigmented choroidal lesions outside of the major arcades. However, little is known about the extent of choroidal involvement in the macula. We aim to describe the vascular abnormalities observed at the level of the choriocapillaris (CC) in the maculae of BSCR patients, using swept source optical coherence tomography angiography (SS-OCTA).

METHODS: A cross-sectional, observational study was conducted. Eligible patients underwent clinical examination and SS-OCTA imaging. The main outcome measures were the frequency of vascular abnormalities observed at the level of the CC on SS-OCTA and foveal choriocapillaris vascular density (CVD).

RESULTS: Twenty-one patients were included, with a median age of 61.5 years. All patients had bilateral disease with a median disease duration of 6 years. All but one patient received systemic immunosuppressive drug therapy, and 19 patients had suppressed inflammation on treatment at the time of the SS-OCTA assessment. Of the 42 affected eyes, 39 (92.9%) had gradable SS-OCTA images, with a mean LogMAR visual acuity of 0.18 (Snellen equivalent 20/30). In total, 34 of 39 (87.2%) eyes had some degree of pathologic flow loss, and after controlling for patient age and disease activity, both worse VA and longer disease duration remained statistically significantly associated with reduced foveal CVD.

CONCLUSIONS: Our findings suggest that pathologic CC flow loss in the macula is frequently encountered and may contribute to visual function decline in patients with BSCR. Further studies with longitudinal follow-up are needed to characterize the evolution of these areas of pathologic CC flow loss over time.

PMID:36827643 | DOI:10.1080/09273948.2023.2183412

J Nerv Ment Dis. 2023 Mar 1;211(3):248-252. doi: 10.1097/NMD.0000000000001616.

ABSTRACT

This study aimed to compare clinical-demographic features of melancholic and nonmelancholic depressions. We included 141 depressed inpatients classified as melancholic and nonmelancholic by the Sydney Melancholia Prototype Index (SMPI) and Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) criteria. Results were controlled for confounders, including severity measures. Melancholic patients by both diagnostic systems were more severely depressed and presented more psychotic symptoms, neurological soft signs, and psychomotor disturbances. Melancholic patients classified by the SMPI were also older at illness onset and had fewer suicide attempts. After controlling for confounders, although all differences remained significant for SMPI diagnosis, the DSM-5 diagnosis of melancholia was only associated with further impaired motor sequencing. The results obtained with the SMPI support the hypothesis that melancholia has clinical features qualitatively different from those of nonmelancholic depressions. Contrarily, the DSM-5 specifier seems to reflect the severity of depressive episodes rather than core clinical features of melancholia.

PMID:36827637 | DOI:10.1097/NMD.0000000000001616