Procedural pain and patient-reported side effects with weekly injections of subcutaneous methotrexate in children with rheumatic disorders

Application of Microsponge Drug Platform to Enhance Methotrexate Administration in Rheumatoid Arthritis Therapy

BACKGROUND/OBJECTIVES

This study aimed to develop a novel nanotechnological slow-release drug delivery platform based on hyaluronic acid Microsponge (MSP) for the subcutaneous administration of methotrexate (MTX) in the treatment of rheumatoid arthritis (RA). RA is a chronic autoimmune disease characterized by joint inflammation and damage, while MTX is a common disease-modifying antirheumatic drug (DMARD), the conventional use of which is limited by adverse effects and the lack of release control.

METHODS

MSP were synthesized as freeze-dried powder to increase their stability and allow for a facile reconstitution prior to administration and precise MTX dosing.

RESULTS

A highly stable and rounded-shaped micrometric MSP, characterized by an open porosity inner structure, achieved both a high MTX loading efficiency and a slow release of MTX after injection. Our drug release assays indeed demonstrated a characteristic drug release profile consisting of a very limited burst release in the first few hours, followed by a slow release of MTX sustained for over a month. By means of a preclinical rat model of RA, the administration of MTX-loaded MSP proved to nearly double the therapeutic efficacy compared to sole MTX, according to a steep reduction in arthritic score compared to control groups. The preclinical study was replicated twice to confirm this improvement in performance and the safety profile of the MSP.

CONCLUSIONS

This study suggests that the MSP drug delivery platform holds significant potential for clinical use in improving RA therapy by enabling the sustained slow release of MTX, thereby enhancing therapeutic outcomes and minimizing side effects associated with conventional burst-release drug administration.

Microneedles loaded with cerium-manganese oxide nanoparticles for targeting macrophages in the treatment of rheumatoid arthritis

BACKGROUND

Rheumatoid arthritis (RA) is a prevalent inflammatory autoimmune disease characterised by persistent inflammation and joint damage with elevated levels of reactive oxygen species (ROS). Current treatment modalities for RA have significant limitations, including poor bioavailability, severe side effects, and inadequate targeting of inflamed joints. Herein, we synthesised cerium/manganese oxide nanoparticles (NPs) as efficient drug carriers with antioxidant and catalytic-like functions that can eliminate ROS to facilitate the polarization of macrophages phenotype from M1 to M2 and alleviate inflammation. Methotrexate (MTX), a first-line RA medication, was loaded into the NPs, which were further modified with bovine serum albumin (BSA) and integrated into dissolving hyaluronic acid-based microneedles (MNs) for transdermal delivery.

RESULT

This innovative approach significantly enhanced drug delivery efficiency, reduced RA inflammation, and successfully modulated macrophage polarization toward an anti-inflammatory phenotype.

CONCLUSION

This research not only presents a promising drug delivery strategy for RA but also contributes broadly to the field of immune disease treatment by offering an advanced approach for macrophage phenotypic reprogramming.

Dissolving microneedle patch-assisted transdermal delivery of methotrexate improve the therapeutic efficacy of rheumatoid arthritis

Methotrexate (MTX) is a first-line treatment for rheumatoid arthritis (RA), but its clinical use is greatly limited by the adverse effects and poor patient compliance caused by traditional oral administration or injection. In recent years, some transdermal drug delivery systems have received considerable attention due to overcoming these shortcomings. In this study, we developed dissolving microneedle patch (DMNP) for transdermal delivery of MTX to treat RA safely and effectively. The morphology, mechanical strength, skin insertion, drug content, in vitro transdermal delivery, and other properties of DMNP were characterized. Meanwhile, the adjuvant-induced arthritis model of rats was established to investigate the therapeutic effect of MTX-loaded DMNP in vivo. The results showed that the microneedles had excellent morphology with neat array and complete needles, good puncture performance and mechanical strength, and rapid intradermal dissolution rate. In vitro transdermal delivery results indicated that microneedles could significantly increase drug transdermal permeation compared with the cream group. The pharmacological study showed that MTX-loaded DMNP significantly alleviated paw swelling, inhibit inflammatory response via downregulating the levels of TNF-α and IL-1β, relieved synovium destruction with less cartilage erosion, and slowed the progression of RA in AIA rats. Besides, DMNP presented better therapeutic performance than cream or intragastric administration at the same dosage of MTX. In conclusion, the MTX-loaded dissolving microneedle patch has advantages of safety, convenience, and high efficacy over conventional administrations, laying a foundation for the transdermal drug delivery system treatment of rheumatoid arthritis.

"Every Little Furrow of Her Brow Makes Me Want To Stop": An Interpretative Phenomenologic Analysis of Mothers' Experiences With Juvenile Idiopathic Arthritis Treatments

OBJECTIVE

Children with juvenile idiopathic arthritis (JIA) are faced with a complex medical journey requiring consistent adherence to treatments to achieve disease management. Parents are intimately involved in JIA treatments; however, little is known about their experiences in this role. This is relevant as many treatments necessitate procedural pain (e.g., self-injections) or side effects (e.g., nausea), which may impact a parents' ability to follow treatment plans. The objective of this study was to explore the lived experiences of parents who identified challenges with their child's JIA treatments.

METHODS

Parents of children with JIA who identified challenges with their child's treatments were invited to take part in semistructured interviews. Data were analyzed using interpretative phenomenological analysis.

RESULTS

Ten mothers of children with JIA (60% female with a mean age of 11.83 years [range 4-16 years]) participated. Four superordinate themes were present in mothers' experiences: 1) treatments altered mothers' roles within the family, increasing their caregiver burden and advocacy; 2) treatments positively and negatively impacted their relationships (e.g., increased support from others, decreased time with others); 3) treatments elicited various emotional responses (e.g., frustration, grief), which affected their well-being; and 4) treatments were at times a source of internal conflict, affecting mothers' actions and adherence.

CONCLUSION

Mothers' experiences with their child's JIA treatments affects them in various ways that can subsequently impact treatment adherence. Results highlight the value of supporting parents through these complex treatment regimens and incorporating their experiences in treatment decisions to help promote optimal outcomes for children with JIA and their families.

Differentially expressed miRNAs in bone after methotrexate treatment

Previous studies have shown that administration of antimetabolite methotrexate (MTX) caused a reduced trabecular bone volume and increased marrow adiposity (bone/fat switch), for which the underlying molecular mechanisms and recovery potential are unclear. Altered expression of microRNAs (miRNAs) has been shown to be associated with dysregulation of osteogenic and/or adipogenic differentiation by disrupting target gene expression. First, the current study confirmed the bone/fat switch following MTX treatment in precursor cell culture models in vitro. Then, using a rat intensive 5-once daily MTX treatment model, this study aimed to identify miRNAs associated with bone damage and recovery (in a time course over Days 3, 6, 9, and 14 after the first MTX treatment). RNA isolated from bone samples of treated and control rats were subjected to miRNA array and reverse transcription-polymerase chain reaction validation, which identified five upregulated miRNA candidates, namely, miR-155-5p, miR-154-5p, miR-344g, miR-6215, and miR-6315. Target genes of these miRNAs were predicted using TargetScan and miRDB. Then, the protein-protein network was established via STRING database, after which the miRNA-key messenger RNA (mRNA) network was constructed by Cytoscape. Functional annotation and pathway enrichment analyses for miR-6315 were performed by DAVID database. We found that TGF-β signaling was the most significantly enriched pathway and subsequent dual-luciferase assays suggested that Smad2 was the direct target of miR-6315. Our current study showed that miR-6315 might be a vital regulator involved in bone and marrow fat formation. Also, this study constructed a comprehensive miRNA-mRNA regulatory network, which may contribute to the pathogenesis/prognosis of MTX-associated bone loss and bone marrow adiposity.

I don't want to think about it: a qualitative study of children (6-18 years) with rheumatic diseases and parents' experiences with regular needle injections at home

BACKGROUND

Overall outcomes of pediatric rheumatic diseases (RD) have improved due to treatment with biologic agents and methotrexate. For many children, this treatment often entails regular needle injections. Pain and fear of needle injections are common in childhood, but how children and parents handle long-term needle injections at home has not been fully explored. This study aimed to explore how regular needle injections affect children with RD and their parents in their daily living.

METHODS

This explorative qualitative study used individual interviews and focus groups to ensure a comprehensive investigation of the topic. Children aged 6 to 16 years (n = 7) and their parents (n = 8) were interviewed individually 4 to 6 months after the onset of needle injection treatment. The focus groups included children aged 11 to 17 years (n = 9) and parents (n = 8) with a minimum of 6 months of experience with injection treatment. Data were analyzed using thematic analysis.

RESULTS

The main themes; "challenges," "motivational factors," and "routines" captured experiences and strategies that influenced the continuation of needle injections at home. Many children feared the moment immediately before the needle stick, although they had become accustomed to the pain. Most parents felt insecure about handling needle injections and lacked follow-up from healthcare providers. The children's experience of treatment effects and self-confidence were essential to maintain motivation for further injections. A number of coping strategies helped children focus away from injection related discomfort, often discovered by chance. Facilitating firm routines and shared responsibility within families helped children develop self-confidence during the procedure. Children and parents struggled to find suitable information on the Internet.

CONCLUSIONS

Children and parents experienced long-term needle injections challenging. They used their own limited resources and cooperated within the families to create routines and to introduce coping strategies necessary to manage and keep up with the procedure. Although the injection itself was not experienced very painful, the discomfort, worries and impact on daily life represented far more than a little needle stick, and thus needs more attention from healthcare providers.

Localised and sustained intradermal delivery of methotrexate using nanocrystal-loaded microneedle arrays: Potential for enhanced treatment of psoriasis

Methotrexate (MTX), typically used as its sodium salt (MTX Na), is a first-line treatments for moderate to severe psoriasis, showing good efficacy. However, its systemic administration is associated with many side effects. Intradermal delivery into psoriatic tissue could offer an alternative approach. However, successful intradermal administration of MTX Na is currently precluded by its physicochemical properties. Moreover, due to its hydrophilic nature, MTX Na is swiftly cleared from the target tissue, necessitating frequent dosing which may affect patient compliance. To address these limitations, we investigated the combination of nanocrystal (NC) and dissolving microneedle (MN) technologies as an alternative approach for localised and sustained intradermal delivery of MTX Na. Poorly water-soluble MTX nanocrystals (MTX NC) were produced by a bottom-up technique with a mean particle size of 678 ± 15 nm. Sustained in vitro drug release was observed over 72 h. The MTX NC were then incorporated into the shafts of dissolving MN arrays with a drug loading of 2.48 mg/array. The MTX NC-loaded MN arrays exhibited satisfactory mechanical strength and insertion capabilities in the skin-simulant Parafilm M® and their shafts dissolved entirely in less than 20 min after insertion into excised neonatal porcine skin. Importantly, in vivo studies in Sprague Dawley rats revealed that the MN arrays were able to deposit approximately 25.1% of the loaded MTX NC in the skin, which acted, in turn, as a drug depot and released the MTX in a sustained manner over 72 h, while minimising MTX systemic exposure. Indeed, 24 h from MN application, 312.70 ± 161.95 µg/g of MTX was retained in the skin at the application site. This was approximately 322-fold higher than the amount of MTX (0.942 ± 0.59 µg/g) retained in the skin after oral administration of MTX Na. Interestingly, even after 72 h after MN application, around 12.5% of the MTX NC deposited in the skin by the MN was retained. In contrast, the maximal blood concentration of MTX achieved following MN application, was only 40% of that measured after oral administration of MTX Na. Accordingly, MTX NC-loaded dissolving MN arrays could be a promising approach for effective localised and sustained intradermal delivery of MTX as a potential enhanced treatment for psoriasis.

[Methotrexate in juvenile idiopathic arthritis. Adverse effects and associated factors]

INTRODUCTION

Methotrexate (MTX) is the drug of choice for juvenile idiopathic arthritis. Its clinical efficacy is limited due to the development of adverse effects (AEs).

PATIENTS AND METHODS

A retrospective observational study was conducted on the AEs associated with MTX therapy in children diagnosed with juvenile idiopathic arthritis followed-up in a tertiary hospital between 2008 and 2016.

RESULTS

The study included a total of 107 patients, of whom 71 (66.3%) were girls (66.3%). The median age at diagnosis was 6.4 years (IQR 3.1-12.4), with a median follow-up of 45.7 months (IQR 28.8-92.4). There were 48 patients (44.9%) with oligoarthritis, and 26 children (24.3%) with rheumatoid-factor negative polyarthritis. Of these, 52/107 (48.6%) developed AEs, with the most frequent being gastrointestinal symptoms (35.6%) and behavioural problems (35.6%). An age older than 6 years at the beginning of therapy increased the risk of developing AEs, both in the univariate (OR=3.5; 95% CI: 1.5-7.3) and multivariate (12% increase per year) analyses. The doses used, administration route, or International League of Associations for Rheumatology (ILAR) classification, were not associated with the development of AEs. Twenty children required a dosage or route of administration modification, which resolved the AE in 11 (55%) cases. MTX was interrupted due to the development of AEs in 37/107 patients (34.6%), mainly due to increased plasma transaminases (n=14, 37.8%), gastrointestinal symptoms (n=9, 24.3%) and behavioural problems (n=6, 16.3%).

CONCLUSIONS

MTX is the therapy of choice for patients with juvenile idiopathic arthritis, but 50% of the children develop some form of AE. Although the AEs are not severe, they lead to interruption of therapy in 35% of the children.

Parent Pain Cognitions and Treatment Adherence in Juvenile Idiopathic Arthritis

OBJECTIVE

Given the high levels of pain and low rates of treatment adherence in children with juvenile idiopathic arthritis (JIA) and their families, this study sought to examine the relationship between parent pain cognitions (i.e., pain catastrophizing, fear of pain) and treatment adherence, and how barriers to treatment (e.g., forgetting treatments, children resisting injections) may be implicated in this relationship.

METHODS

Parents of children under 18 years of age who have been diagnosed with JIA were recruited to complete an online survey. In total, 221 parents (93% mothers) of children aged 2-17 years (M = 11.10, SD = 4.25) took part, completing questions regarding their pain cognitions, perceived barriers to treatment, and their child's arthritis treatment adherence ability.

RESULTS

Hierarchical regressions demonstrated that both pain cognitions (i.e., pain catastrophizing and fear of pain) were related to a decrease in parent-reported treatment adherence, however, pain catastrophizing was no longer significant when fear of pain was added to the model. The presence of treatment barriers partially mediated the relationship between fear of pain and treatment adherence, above and beyond the alternate model proposed.

CONCLUSION

These results suggest that parent pain catastrophizing and fears of pain are related to a greater difficulty following treatment plans, possibly in part because of barriers parents experience that preclude adherence. Given these findings, the identification and management of parent pain cognitions is critical to improving treatment adherence and outcomes for children with JIA and their families.

Perceptions of Methotrexate Intolerance and Its Impact on Daily Life in School-Age Children with Juvenile Idiopathic Arthritis

PURPOSE

Methotrexate (MTX) is a disease modifying anti-rheumatic drug commonly used to treat children with Juvenile Idiopathic Arthritis (JIA). Unfortunately, half of children taking MTX will experience MTX intolerance, which includes distressing gastrointestinal and behavioural symptoms associated with weekly MTX treatment. This qualitative study aimed to explore the perceptions of school-age children with JIA experiencing MTX intolerance, how they managed MTX intolerance, and how it impacted their daily life.

DESIGN AND METHODS

An interpretive descriptive design was used. Twelve children participated in one individual 30-minute semi-structured interview using a storyboard technique to elicit their perceptions through storytelling. Interview transcripts and observational data collected during the interviews were analyzed using inductive content analysis.

RESULTS

Children described MTX intolerance as extremely challenging. Three themes emerged from the data: (1) "No kid likes taking MTX". This theme was comprised of two subthemes related to: (a) associative MTX intolerance; namely, "Talking about it sometimes makes me feel sick"; and (b) anticipatory MTX intolerance, "Before [I take it], I have a little stomach ache". Other themes included: (2) The importance of strategies and routines; and (3) Working hard to live with MTX intolerance.

CONCLUSIONS

This study sheds new light on MTX intolerance as perceived by school-aged children with JIA. Results highlight the importance of providing families and healthcare professionals with the necessary information for early recognition of MTX intolerance and optimizing care through the development of early intervention strategies.

PRACTICE IMPLICATIONS

Study findings highlight the importance of prioritizing early identification and prevention of MTX intolerance.

Struggling in the Dark to Help My Child: Parents' Experience in Caring for a Young Child with Juvenile Idiopathic Arthritis

PURPOSE

The purpose of this study is to describe parents' experiences in caring for 2-5-year-old children with juvenile idiopathic arthritis (JIA).

DESIGN AND METHODS

A qualitative study using single-occasion in-depth interviews was conducted. Nine parents (eight mothers and one father) were interviewed in-person or via telephone. Data were analyzed using inductive content analysis. Methods used to protect the trustworthiness of study results included maintenance of an audit trail, peer debriefing, and member checks.

RESULTS

The core construct Struggling in the Dark to Help My Child explained parents' experience in six domains: not knowing, trying to reach out in the dark, feeling my child's pain, working out the kinks to stay on top to manage, feeling drained by the whole process, and being hard on the entire household. Parents struggled with the unknown, searched for resources, witnessed their child's suffering without knowing how to help, and tried every possible way to stay on top of the child's illness and treatment, even when they felt drained physically and emotionally. JIA not only consumed their lives, but also affected the entire family, including the siblings and spouse, and the relationships among family members.

CONCLUSION AND IMPLICATIONS

Findings highlight the day-to-day lived challenges parents face when caring for a young child with JIA. Healthcare providers including nurses need to assess the particular needs of an ill child and parents as well as the impact of the illness on the physical and psychosocial health of the entire family so that proper resources can be provided.