Injection Of Solution Research Articles

Study of anti-inflammatory activity and acute toxicity indicators of new silver salt of pyrazole-3-carboxamide

Objective. To study the anti-inflammatory activity and some toxicological indicators of the new derivative of pyrazole-3-carboxamide SSP. Materials and methods. To assess the biological activity of the compound, its anti-inflammatory effect was studied in the model of acute inflammatory edema caused by sub-plantar injection of carrageenan solution into a rat`s hind leg. The duration effect was assessed by the intensity of suppression of the inflammatory response in relation to the control level. In order to study the safety of the substance, the local irritant effect was determined when applied cutaneously in the experiments on rats. The severity of the irritant effect was assessed by the erythema degree, the amount of edema and the increase in local skin temperature. In addition, acute toxicity of the substance under study was determined. The test compound and reference drugs were applied to the skin. Results. The study of acute toxicity of the compound SSP and the reference drug nystatin when applied cutaneously to rats showed that LD50 of both substances was more than 2500,0 mg/kg. Indicators of the degree of local irritating effect of the drugs demonstrate its absence. At the same time, the studied SSP compound has no anti-inflammatory effect administered either orally or cutaneously. Conclusions. The data obtained allow us to classify the new silver salt of pyrazol-3-carboxamide SSP as a class 5 non-toxic substance. The studied SSP compound has no local irritant effect and does not demonstrate anti-inflammatory activity in the carrageenan inflammation model.

Stability of Mg IG/GSH combo injection

Objective: To investigate the stability of magnesium isoglycyrrhizinate (Mg IG) injection solution when mixed with reduced glutathione (GSH) injection solution at room temperature. Method: High-performance liquid chromatography was used to determine the concentration changes of Mg IG injection solution mixed with GSH injection solution in 5% and 10% glucose solutions. Results: No significant changes in concentration were observed within 0, 0.5, 1, 1.5, 2, and 4 hours after mixing the Mg IG injection solution with the GSH injection solution. Conclusion: Mg IG injection solution can be mixed with GSH injection solution in 5% and 10% glucose solutions and should be used within 4 hours.

Aflibercept 8 mg/0.07 mL (Eylea HD)

Reimbursement reviews are comprehensive assessments of the clinical effectiveness and cost-effectiveness, as well as patient and clinician perspectives, of a drug or drug class. The assessments inform non-binding recommendations that help guide the reimbursement decisions of Canada’s federal, provincial, and territorial governments, with the exception of Quebec. This review assesses aflibercept (Eylea HD) 8 mg (0.07 mL), solution for intravitreal injection. Indication: For the treatment of neovascular (wet) age-related macular degeneration (nAMD).

Elranatamab (Elrexfio)

Reimbursement reviews are comprehensive assessments of the clinical effectiveness and cost-effectiveness, as well as patient and clinician perspectives, of a drug or drug class. The assessments inform non-binding recommendations that help guide the reimbursement decisions of Canada’s federal, provincial, and territorial governments, with the exception of Quebec. This review assesses elranatamab (Elrexfio), 40 mg/mL, solution for subcutaneous injection supplied as 76 mg/1.9 mL (40 mg/mL) in a single-dose vial and 44 mg/1.1 mL (40 mg/mL) in a single-dose vial. Indication: For the treatment of adult patients with relapsed or refractory multiple myeloma who have received at least 3 prior lines of therapy, including a proteasome inhibitor, an immunomodulatory agent, and an anti-CD38 monoclonal antibody, and who have demonstrated disease progression on the last therapy.

Intratympanic injections made from eutectic liquid (camphor and menthol)-based oil-less emulsions containing morin hydrate-lipoid E80 complex: An approach to augment drug permeation into inner ear region in a healthy rabbit model

Morin hydrate (MH, flavonols of plants, family-Moraceae) promotes inner ear stem cell survival and differentiation process to preserve the healthy hearing function. However, round window membrane (RWM) of inner ear provides a barrier for MH to reach an adequate amount at inner ear region. Since MH possesses a low aqueous solubility (28.72 ± 0.97 μg/ml), intratympanic (IT) injections of camphor-menthol eutectic liquid-based oil-less emulsions containing MH-Lipoid E80 complex was developed to promote MH ferrying action across RWM. At 360 min post-dissolution time point, the MH solution displayed 92.88 ± 6.26 % drug release, but the drug-Lipoid E80 complex-loaded oil-less emulsions showed 58.05 ± 11.62 % only. The MTT assay results indicate the possible non-toxicity of oil-less emulsions to L-929 cells up to 100 μg/ml concentration. Significant differences were seen between the Cmax and AUC0-t values observed at 90 min in the perilymph after the IT injections of MH solution (14.13 ± 0.33 × 103 ng/ml & 429.55 ± 9.20 × 103 ng min/ml) and MH-Lipoid E80 complex-loaded oil-less emulsions (117.93 ± 4.24 × 103 ng/ml & 5529.46 ± 37.65 × 103 ng min/ml) into the healthy albino rabbits. Hence the IT injections of eutectic liquid-based oil-less emulsions could facilitate the drugs crossing over of RWM in the inner ear regions.

Injectable nanocomposite hydrogel with cascade drug release for treatment of uveal melanoma

Uveal melanoma (UM) is the most common malignant intraocular tumor with the trait of distant metastases. Currently, the standard clinical therapy results in suboptimal outcomes due to ineffective inhibition of tumor metastasis. Thus, developing novel therapeutic modalities for UM remains a critical priority. Herein, we have developed an injectable nanocomposite hydrogel (HA-DOX/LAP gel) through integrating hyaluronic acid-based drug-loaded nanoparticles into an alginate-dopamine gel, delivering the chemotherapeutic drugs, lapatinib and doxorubicin for combinational treatment of UM. HA-DOX/LAP gel is fabricated in situ by a simple injection of the mixed precursor solution into tumor sites and maintains in vivo for more than 21 days. The entrapped drug-loaded nanoparticles can gradually release from HA-DOX/LAP gel, enhancing tumor targeting and penetration, and synchronously releasing lapatinib and doxorubicin into the acidic intracellular environment to synergistically destroy UM cells. In vivo anti-tumor studies conducted in MuM-2B tumor models demonstrated that HA-DOX/LAP gel significantly impedes tumor growth, diminishes postoperative recurrence, and prolongs overall survivals of UM tumor-bearing mice through only single injection. Remarkably, the escaped drug-loaded nanoparticles effectively reduce the risk of tumor metastases. Our findings provide new insights for the development of multifunctional nanocomposite-incorporating combination therapy against UM by targeting tumor recurrence and metastases.

Simultaneous determination of 17 perfluoroalkyl substances in beef by EMR-Lipid dispersive solid-phase extraction and ultra performance liquid chromatography-tandem mass spectrometry

The ability to accurately analyze perfluoroalkyl substance (PFAS) levels in beef is imperative in order to effectively assess food-safety risks and ensure consumer safety because PFASs are harmful and prevalent in beef. In this study, we developed a rapid and accurate method for the simultaneously determination of the 17 PFASs in beef using dispersive solid-phase extraction (d-SPE) and ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), and optimized the mobile phase system, extraction solvent, and d-SPE materials. Samples were finally extracted using 0.1% (v/v) formic acid in acetonitrile, cleaned using d-SPE with PSA, C18, GCB, and EMR-Lipid, separated using an Acquity Premier BEH C18 column (100 mm×2.1 mm, 1.7 μm) with 0.5 mmol/L ammonium fluoride aqueous solution and methanol as the mobile phases at a flow rate of 0.3 mL/min. Analytes were detected in negative ion switching mode (ESI-) with multiple reaction monitoring (MRM) scanning, and quantitatively analyzed using the internal standard method. The 17 PFASs exhibited linearity in the 0.2-20.0 μg/L range under the optimal experimental conditions, with correlation coefficients of 0.9915-0.9999. The method delivered limits of detection (LODs) of 0.003-0.007 μg/kg and limits of quantification (LOQs) of 0.01-0.02 μg/kg. The 17 PFASs exhibited recoveries of 71.1%-127.4% with RSDs of 0.6%-14.4% when spiked at three levels (0.05, 0.5, and 1.8 μg/kg). We optimized the mobile phase system, which revealed that, compared with 2.0, 5.0, and 10.0 mmol/L ammonium formate or ammonium acetate in aqueous methanol, 0.5 mmol/L ammonium fluoride in aqueous methanol exhibited higher sensitivities for all the 17 PFASs, with PFASs bearing long-chain carboxylic acids (C10-C18) showing 1-2 fold increases in sensitivity. PFASs do not dissociate in acidic environments, favoring their entry into the organic phase. Therefore, we investigated the effect of extractant acidity, which revealed that the 17 PFASs were better extracted using 0.1% (v/v) formic acid in acetonitrile. The beef matrix has a complex composition; consequently, d-SPE adsorbents were required to purify samples and reduce matrix effects. The purification effects of four adsorbents (PSA, C18, GCB, and EMR-Lipid) toward the 17 PFASs and the amount of EMR-Lipid used were investigated, which revealed that 100 mg PSA+80 mg C18+40 mg GCB+150 mg EMR-Lipid exhibited superior matrix-purification behavior. We also investigated the effects of various injection solutions and types of syringe filter, with pure methanol selected for reconstitution and high-speed supernatant centrifugation applied prior to injection. The developed method is simple, rapid, sensitive, and reproducible, and can be used to simultaneously, rapidly, and accurately determine various perfluoroalkyl compounds in beef.

Electric-field assisted silicon nanowire field effect transistor for the ultra-low concentration nucleic acid detection

Ultra-low concentration nucleic acid detection is crucial for disease diagnosis and prognosis. Silicon nanowire field-effect transistors (SiNW FETs) are promising due to their sensitivity, real-time capabilities, and compact design. A critical consideration for FETs is the reaction time required for nucleic acid diffusion to the detection surface, especially at low concentrations. This study utilizes polycrystalline silicon nanowire FETs (poly-SiNW FETs) as biosensors, employing a negative voltage on the liquid gate used for detection to create an electric field. This field accelerates nucleic acid diffusion towards the sensor surface to interact with immobilized probes. We adjusted the gate voltages and target solution injection flow rates to identify optimal parameters for nucleic acid detection and how the electrical field accelerates hybridization kinetics. We varied the probe immobilization times to show that higher ligand density accelerates the interaction with the immobilized probe. The study demonstrated stable diffusion of target DNA by combining FET with an electric field of −1 V and a slow injection flow rate, reducing the equilibrium time from 60 to 20 min. Additional improvement was achieved by enhancing probe immobilization density and applying an electric field, resulting in a faster probe-target hybridization reaction rate. These efforts significantly improved the signal to maintain superior performance and reduced the time required to reach equilibrium. This research pioneers using an external electric field to expedite detection time in field-effect transistors, demonstrating the potential for accelerated nucleic acid detection in nanowire FETs.

Combined Surgical Approach for Repair of Refractory Macular Hole in Myopic Traction Maculopathy

Purpose: To present a combined surgical approach for repair of a persistent full-thickness macular hole (MH) in patients with myopic traction maculopathy. Methods: Two cases were evaluated. Results: Combining a macular buckle and pars plana vitrectomy with a controlled subretinal injection of a balanced salt solution resulted in MH closure and vision improvement in both cases. Case 1 also had significant recovery of macular sensitivity on microperimetry evaluation. Conclusions: Retinal redetachment was avoided by using the buckle indentation to provide external support of the posterior pole, resulting in successful closure of the MH and improvement in functional outcomes.

Efficacy of hypertonic dextrose (prolotherapy) in early knee osteoarthritis: a short term outcome

Background: Knee osteoarthritis (OA) is a prevalent, painful, and progressive condition significantly affecting patients' quality of life and imposing a social and economic burden. Traditionally managed through symptom relief and joint function improvement, research is increasingly focusing on disease-modifying treatments. Dextrose prolotherapy, a low-cost alternative involving the injection of a hypertonic solution, has shown promise despite limited acceptance in current guidelines. Methods: This prospective cohort study, approved by the Institutional Ethical Board of Jamia Hamdard University, assessed the effects of 12.5% hypertonic dextrose prolotherapy in 92 patients with knee OA. Patients received injections at multiple sites over a 6-week period. Outcomes were evaluated using the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) and visual analog scale (VAS) scores at baseline, 4, 8, 16, and 24 weeks. Results: Significant improvements were observed in both WOMAC and VAS scores. WOMAC scores decreased from 53.83 to 26.70 (p<0.0001), and VAS scores dropped from 7.12 to 3.06 (p<0.0001) at the 24-week follow-up. No major complications were noted, with minimal adverse effects reported. Improvement was consistent across all OA grades. Conclusions: Dextrose prolotherapy demonstrated substantial, sustained improvements in pain and function in knee OA patients. Given its safety, low cost, and efficacy, it represents a viable therapeutic option, especially in resource-constrained settings. Further high-quality randomized controlled trials are needed to confirm these findings and optimize treatment protocols.

Electroacupuncture preconditioning prevents urticaria by regulating inflammatory response in rats with urticaria

To observe the effect of electroacupuncture (EA) preconditioning at "Quchi" (LI11) and "Xuehai" (SP10) in prevention of urticaria. Twenty-four male SD rats were randomly divided into control, model and preconditioning of EA (Pre-EA) groups (8 rats/group). The urticaria model was established by intradermal injection of dilute allogeneic antioalbumin serum at the spots of the bilateral symmetry of the spine on the back, and followed by tail venous injection of mixture solution of egg albumin diluent, plus 0.5% Evans blue and normal saline. Ten days before the end of modeling, rats of the pre-EA group received EA stimulation of LI11 and SP10 for 20 min, once a day for 10 consecutive days. The times of rat's scratching the sensitized skin were recorded. HE staining method was used to observe the pathological changes of skin tissue, and toluidine blue staining method was used to observe the morphology of mast cells (MCs) in the skin, blood, mesentery, and peritoneal fluid, and calculate the degranulation rate. Immunohistochemical stainning was used to detect immunoglobulin E (IgE), histamine (HIS), and 5-hydroxytryptamine (5-HT) expressions in subcutaneous tissue. NOD like receptor thermal domain associated protein 3 (NLRP3) inflammasome, apoptosis related granule protein (ASC), and cysteine aspartate aminotransferase 1 (Caspase-1) protein expression levels in skin tissue were detected by Western blot. The contents of serum interleukin(IL)-1β and IL-18 were detected using ELISA method. Compared with the control group, the scratching times, amount of Evans blue exudation of the sensitized blue spots, degranulation rate of MCs in skin, blood, mesentery and peritoneal fluid, the expression levels of IgE, HIS, 5-HT in subcutaneous tissue, protein expression levels of NLRP3, ASC, Caspase-1 in skin tissue, and the contents of serum IL-1β and IL-18 were significantly increased (P<0.01, P<0.05) in the model group. In comparison with the model group, the scratching times, amount of Evans blue exudation of the sensitized blue spots, degranulation rate of MCs, the expression levels of IgE, HIS, 5-HT in subcutaneous tissue, protein expression levels of NLRP3, ASC, Caspase-1 in skin tissue, and the contents of serum IL-1β and IL-18 in EA group were significantly decreased (P<0.01, P<0.05). EA preconditioning at LI11 and SP10 can prevent and treat UR by inhibiting inflammatory response, which is related to the regulation of pyroptosis.

The effect of cinnamic acid derivative on the activity of mitochondrial enzymes in brain tissue under conditions of experimental Parkinson's disease

The aim: to evaluate the effect of cinnamic acid derivative on changes in mitochondrial enzymes activity in rats brain tissue under conditions of experimental Parkinson's disease. Materials and methods. Parkinson's disease was modeled in male Wistar rats by direct injection of rotenone solution (5 mg/ml) into the striatum. The analyzed compound 4-hydroxy-3,5-di-tretbutyl cinnamic acid and the reference ethylmethylhydroxypyridine succinate were administered orally in equivalent doses (100 mg/kg) for 30 days from the moment of pathology modeling. Next, a brain supernatant was obtained by differential centrifugation, in which changes in the activity of enzymes: citrate synthase, succinate dehydrogenase, cytochrome c oxidase and aconitase were evaluated. The obtained results were processed statistically. During the analysis, the StatPlus 7.0 application software package was used. Results. During the study, it was found that the administration of 4-hydroxy-3,5-di-tretbutyl cinnamic acid to rats increased the activity of citrate synthase, succinate dehydrogenase, cytochrome c oxidase and aconitase relative to untreated animals by 109.7% (p0.05); 53.6% (p0.05); 65.0% (p0.05) and 63.1% (p0.05), respectively, whereas against the background of the use of the reference, the activity of these enzymes increased by 56.3% (p0.05); 57.7% (p0.05); 71.7% (p0.05) and 49.1% (p0.05), respectively. At the same time, the activity of citrate synthase in animals treated by 4-hydroxy-3,5-di-tretbutyl cinnamic acid was higher than that in rats treated by the reference by 34.2% (p0.05). Conclusions. The study showed that the course administration of 4-hydroxy-3,5-di-tretbutyl cinnamic acid to animals with experimental Parkinson's disease is accompanied by an increase in the activity of mitochondrial enzymes, which may reflect the significant effect of this compound on the processes of mitochondrial biogenesis, mitophagy and generation of mitochondrial reactive oxygen species.

Validation of an UPLC-PDA Method for the Simultaneous Quantification of Phenol and Iomeprol in a Sterile Parenteral Preparation Used for Coeliac Plexus Block, and Its Application to a Pharmaceutical Stability Study

Objectives: A commonly applied analgesic therapy for patients with severe abdominal pain due to cancer-related pain in the upper abdomen, is coeliac plexus neurolysis (CPN). Herein, a combination product of phenol and an iodine contrast agent are injected simultaneously. The chemical stability of such a combination product is unknown, and no chromatographic method is yet available that describes the simultaneous quantification of phenol and iomeprol. The aim of this study was to develop and validate a stability-indicating UPLC method for the simultaneous quantification of both phenol and iomeprol and to determine the chemical stability of a sterile 100 mg/mL phenol in 350 mg I/mL iomeprol solution for injection during shelf life. Methods: The product was compounded and sterilized in a GMP certified facility. The pharmaceutical analysis was validated by determination of the accuracy, precision, specificity, selectivity, carry-over and linearity. Pharmaceutical product stability was determined before and after sterilization, and during shelf life of 36 months at 25°C ± 2°C. Results: The accuracy for phenol and iomeprol was 97.1% to 99.3% and 100.0% to 100.2%, respectively. The RSD for repeatability and reproducibility for phenol were 0.65% and 1.17%, and for iomeprol 0.61% and 1.49%, respectively. All other tested parameters met the predefined validation criteria. All concentrations at all tested time points remained within ±2% of the initial concentrations for phenol and ±4% for iomeprol. No additional peaks were visible on the chromatograms. Conclusion: A stability-indicating method for the simultaneous quantification of phenol and iomeprol in a parental pharmaceutical preparation was developed and validated. This method was used to demonstrate the chemical stability of a newly developed sterile solution of 100 mg/mL phenol and 350 mg I/mL iomeprol. Chemical product stability was demonstrated during shelf life of up to 36 months.

Bimekizumab (Bimzelx)

Reimbursement reviews are comprehensive assessments of the clinical effectiveness and cost-effectiveness, as well as patient and clinician perspectives, of a drug or drug class. The assessments inform non-binding recommendations that help guide the reimbursement decisions of Canada’s federal, provincial, and territorial governments, with the exception of Quebec. This review assesses bimekizumab (BIMZELX), 160 mg/mL, solution for injection, subcutaneous injection. Indication: The treatment of adult patients with active ankylosing spondylitis who have responded inadequately or are intolerant to conventional therapy.

Assessment of Computer-Controlled Starpen Device and Conventional Aspirating Cartridge on Pain Perception in Paediatric Dental Patients – A Split-Mouth Crossover Study

Abstract Background: Local anaesthesia (LA) is the cornerstone for pain management of invasive dental procedures, but the process of delivering it may itself induce anxiety, especially in paediatric patients that can affect the pain perception. Advances such as the computer-controlled LA delivery system have expanded the horizons of LA and can serve as an alternative for painless injections. Objective: To examine the pain perception and anxiety reduction along with patient preference between computer-controlled Starpen device and conventional aspirating cartridge in LA administration for inferior alveolar nerve block. Materials and Methods: The patients were randomly allotted into two groups: Starpen and Septodont syringe where the LA injections were given using both the methods in the 1st week. After a washout period of 1 week, the crossover was performed and the other mode of LA administration was performed in the 2nd week. Pain scores were objectively recorded by the observer using the Face, Legs, Activity, Cry and Consolability (FLACC) scale during LA administration and extraction. Patients were asked to record the pain scores using the Visual Analogue Scale at three phases: (a) mucosa perforation, (b) needle insertion and (c) solution injection. The effect of pain perception on the vital parameters and the preference between the two techniques were assessed. Statistical Package for the Social Sciences (SPSS) version 23.0, Armonk, NY, USA: IBM Corp was used for statistical analysis, and Mann–Whitney U-test and unpaired t-test were utilised to compare the mean difference of two groups at significance level of 0.05. Results and Observations: Intergroup differences among the Starpen and Septodont syringe groups were found to be statistically significant (P &lt; 0.001) during both LA and extraction when pain was objectively assessed using FLACC. Conclusion: Computerised devices such as Starpen offer controlled release of local anaesthetics, effectively decreasing pain perception in paediatric patients and can form a mainstay for the behaviour management of young patients.

Combined Treatment With Inverted Internal Limiting Membrane Flap and Subretinal Injection of Balanced Salt Solution to Repair Chronic Macular Holes

Purpose: To present a surgical technique that combines an inverted internal limiting membrane (ILM) flap and subretinal injection of balanced salt solution for the closure of chronic macular holes (MH). Methods: Two cases are presented. Results: A 74-year-old man and a 63-year-old woman presented with decreased visual acuity (VA) of 20/600 and 20/200, respectively, resulting from a chronic MH. Both patients had vitrectomy, during which the ILM flap was inverted and a 38-gauge subretinal needle was used to inject balanced salt solution near the vascular arcade, creating a retinal bleb. Injection of the balanced salt solution into the MH with a backflush needle completed the detachment. The MH was then closed by a gas tamponade with improvements in VA in both patients to 20/50 and 20/40, respectively. Conclusions: The combined inverted ILM flap and subretinal injection of balanced salt solution into the MH, extending the detachment, led to the successful closure of a chronic MH.

Closed-Form solutions of injection driven flow and heat transfer inside an inclined horizontal filter chamber using Lie group method

Closed-Form solutions of injection driven flow and heat transfer inside an inclined horizontal filter chamber using Lie group method

Application of Subretinal Balanced Salt Solution Injection: A Novel technique in treating Severe idiopathic Epiretinal Membrane

Application of Subretinal Balanced Salt Solution Injection: A Novel technique in treating Severe idiopathic Epiretinal Membrane

Description and Outcomes of an Ultrasound-Guided Technique for Catheter Placement in the Canine Quadratus Lumborum Plane: A Cadaveric Tomographic Study and Clinical Case Series.

This study aimed to describe an ultrasound-guided technique for implanting catheters for local anesthetic administration into the quadratus lumborum (QL) inter-fascial plane in canine cadavers and assessing the spread along the vertebral bodies (VBs) by computed tomography (CT). Phase 1: eight canine cadavers received one catheter per hemiabdomen, followed by injection of contrast media solution [low volume (LV) 0.3 mL kg-1 or high volume (HV) 0.6 mL kg-1]. Phase 2: postoperative pain of five dogs was managed by injecting 0.3 mL kg-1 of ropivacaine 0.5% through QL catheters every eight hours, up to 72 h after abdominal surgery. Pain was assessed using the Short Form of the Glasgow Composite Measure Pain Scale, and methadone 0.2 mg kg-1 was administered intravenously when the pain score was ≥6. The number of VBs stained by the contrast solution between the QL and psoas minor muscles was significantly higher in group HV than group LV. The catheter tip was visualized in the retroperitoneal space in 1/16 and 2/10 hemiabdomens in phases 1 and 2, respectively. Rescue analgesia was required in 3/5 dogs during the postoperative period. The QL catheter placement technique appears feasible and may be included in a multimodal analgesic approach for dogs undergoing abdominal surgeries.

S1522 Efficacy and Safety of Sodium Alginate as an Injection Solution in Endoscopic Submucosal Dissection: A Systematic Review and Meta-Analysis

S1522 Efficacy and Safety of Sodium Alginate as an Injection Solution in Endoscopic Submucosal Dissection: A Systematic Review and Meta-Analysis