Publications by authors named "Bwalya A Witika"

Bedaquiline (BDQ) is a drug used to treat multidrug-resistant tuberculosis (MDR-TB). It exhibits exposure-dependent efficacy in eliminating Mycobacterium tuberculosis (Mtb). An easy, efficient and precise reverse-phase ultrafast liquid chromatography (RP-UFLC) method was developed to validate the free base of the antitubercular medication BDQ.

View Article and Find Full Text PDF
Article Synopsis
  • Triple-negative breast cancer (TNBC) lacks key hormone receptors, leading to high recurrence and mortality, creating a strong demand for better treatment options.
  • Innovative strategies like nanoparticles are being researched for TNBC treatment, offering unique properties that enhance drug delivery and targeting.
  • The manuscript reviews the latest advancements in nanomaterials, including liposomes and gold nanoparticles, highlighting their potential as effective anticancer agents and in improving drug delivery systems for TNBC.
View Article and Find Full Text PDF
Article Synopsis
  • * Nanotechnology offers a promising solution for both early diagnosis and treatment of PCa by enabling precise drug delivery to cancer sites, and it is becoming significant in cancer management.
  • * The use of radiolabelled nanomaterials in nuclear medicine aims to enhance the targeting of imaging and treatment agents for PCa, and while there may be safety concerns, their potential to improve patient outcomes looks promising.
View Article and Find Full Text PDF

Lipid nanocarriers have attracted a great deal of interest in the delivery of therapeutic molecules. Despite their many advantages, compliance with quality standards and reproducibility requirements still constrain their industrial production. The relatively high failure rate in lipid nanocarrier research and development can be attributed to immature bottom-up manufacturing practices, leading to suboptimal control of quality attributes.

View Article and Find Full Text PDF
Article Synopsis
  • Preformulation investigations are essential for developing successful drug formulations, focusing on drug structure, excipients, composition, and physical properties, particularly for nanoemulsions.* -
  • This study aimed to evaluate the properties of bedaquiline (BDQ) and select suitable excipients for self-emulsifying BDQ-loaded nanoemulsions, using methods like HPLC for solubility and FTIR for compatibility assessment.* -
  • Results showed BDQ has the highest solubility in olive oil (3.45 mg/ml), and compatibility studies indicated no significant interactions with selected excipients, confirming the effectiveness of the preformulation process.*
View Article and Find Full Text PDF
Article Synopsis
  • * Vesicular drug delivery systems (VDDS) enhance herbal medicine delivery by improving solubility, enabling targeted action, and providing controlled release.
  • * This review focuses on the potential of plant-based VDDS to protect lung function and offers innovative strategies for managing respiratory illnesses.
View Article and Find Full Text PDF
Article Synopsis
  • The study investigated the awareness and acceptance of COVID-19 vaccines among 326 pharmacy students in Zambia, finding that while 98.8% were aware of the vaccines, only 24.5% were willing to accept vaccination.
  • Factors influencing vaccine acceptance included being male, single, and unemployed, with males significantly more likely to accept the vaccine compared to females, and unmarried individuals more likely than those who are married.
  • Major barriers to vaccine acceptance reported by students included concerns about side effects (78.5%) and skepticism regarding the vaccine's effectiveness (10.2%).
View Article and Find Full Text PDF
Article Synopsis
  • The tumor microenvironment (TME) is made up of both cancerous and non-cancerous cells, affecting how cancer develops and progresses.
  • Reactive oxygen species (ROS) play a dual role; at low levels, they help cancer cells grow and spread, while at high levels, they can cause cell damage and death.
  • Nanotechnology is being explored to improve cancer treatments by delivering ROS-inducing agents directly to tumors, which could minimize harm to healthy cells and enhance treatment effectiveness.
View Article and Find Full Text PDF

Adolescents and youths are a key part of the population that needs to be protected against the coronavirus disease 2019 (COVID-19). This is because they are more likely to spread the virus to vulnerable individuals. In view of these concerns, this study investigated the uptake of COVID-19 vaccines and associated factors among adolescents and youths attending secondary schools in Zambia.

View Article and Find Full Text PDF

The uptake of COVID-19 vaccines is critical to address the severe consequences of the disease. Previous studies have suggested that many healthcare workers (HCWs) are hesitant to receive the COVID-19 vaccine, further enhancing hesitancy rates within countries. COVID-19 vaccine acceptance and hesitancy levels are currently unknown among HCWs in Zambia, which is a concern given the burden of infectious diseases in the country.

View Article and Find Full Text PDF

Bone and joint infections are associated with prolonged hospitalizations, high morbidity and complexity of care. They are difficult to treat, and successful therapy requires organism-specific antimicrobial therapy at high doses for a prolonged duration as recommended in standard treatment guidelines (STGs). Adherence to the treatment plan is equally important, which is enhanced with knowledge of the condition as well as appropriate antibiotics.

View Article and Find Full Text PDF

Malaria is a life-threatening, blood-borne disease with over two hundred million cases throughout the world and is more prevalent in Sub-Saharan Africa than anywhere else in the world. Over the years, several treatment agents have been developed for malaria; however, most of these active pharmaceutical ingredients exhibit poor aqueous solubility and low bioavailability and may result in drug-resistant parasites, thus increasing malaria cases and eventually, deaths. Factors such as these in therapeutics have led to a better appreciation of nanomaterials.

View Article and Find Full Text PDF

Bone and joint infections (BJIs) are difficult to treat, necessitating antimicrobial therapy at high doses for an extended period of time, in some cases different from our local guidelines. As a consequence of the rise in antimicrobial-resistant organisms, drugs that were previously reserved for last-line defense are now being used as first line treatment, and the pill burden and adverse effects on patients are leading to nonadherence, encouraging antimicrobial resistance (AMR) to these last-resort medicines. Nanodrug delivery is the field of pharmaceutical sciences and drug delivery which combines nanotechnology with chemotherapy and/or diagnostics to improve treatment and diagnostic outcomes by targeting specific cells or tissues affected.

View Article and Find Full Text PDF

The formulation of poorly soluble drugs is an intractable challenge in the field of drug design, development and delivery. This is particularly problematic for molecules that exhibit poor solubility in both organic and aqueous media. Usually, this is difficult to resolve using conventional formulation strategies and has resulted in many potential drug candidates not progressing beyond early stage development.

View Article and Find Full Text PDF
Article Synopsis
  • Skin delivery is a promising method for drug administration, offering benefits like controlled release and adaptability, but faces challenges due to low skin permeability.
  • Overcoming the skin barrier can be addressed through innovative approaches, such as lipid nanosystems, which are cost-effective and stable.
  • The review discusses skin structure, nanoparticle penetration pathways, influential factors for effective delivery, and the regulatory aspects of using lipid nanosystems for dermal and transdermal applications.
View Article and Find Full Text PDF
Article Synopsis
  • * Current treatments like chemotherapy and radiation can have severe side effects and limited effectiveness due to drug resistance and low bioavailability.
  • * There is growing interest in natural compounds like iridoids, which may enhance the effectiveness of existing drugs and offer cheaper, less toxic alternatives in cancer therapy.
View Article and Find Full Text PDF

Background: Difficulties faced by blind patients in using medicines are largely unknown and underexplored. This limits the ability of health providers and health policy makers to plan and provide for medicine related needs of this special group.

Objectives: To describe the challenges faced by blind patients around Mankweng Hospital when taking chronic medications and to identify methods used to overcome the challenges.

View Article and Find Full Text PDF

The coronavirus disease 2019 (COVID-19) pandemic resulted in the closure of schools to slow the spread of the virus across populations, and the administration of vaccines to protect people from severe disease, including school children and adolescents. In Zambia, there is currently little information on the acceptance of COVID-19 vaccines among school-going children and adolescents despite their inclusion in the vaccination programme. This study assessed the knowledge, attitudes, and acceptance of COVID-19 vaccines among secondary school pupils in Lusaka, Zambia.

View Article and Find Full Text PDF
Article Synopsis
  • The study assessed the knowledge and practices regarding COVID-19 among 478 healthcare students at the University of Zambia, following the pandemic's disruption of physical classes globally.
  • Results showed that the mean knowledge score was 87.9, with medical students scoring the highest, while the mean practice score was 60.0, significantly higher among nursing and physiotherapy students.
  • Additionally, older students and those living in urban areas demonstrated better practices toward COVID-19, although the type of training program did not significantly affect knowledge or practices.
View Article and Find Full Text PDF
Article Synopsis
  • Theranostics is an innovative approach that combines diagnostics and therapeutics, allowing for simultaneous detection and treatment of diseases, which is vital for advancing modern medicine.
  • Recent advancements in nanobiotechnology and the green synthesis of metallic nanoparticles (MNPs), particularly through the use of medicinal plants, are showing promise in enhancing these theranostic capabilities.
  • Medicinal plant-derived MNPs are being researched for their potential effectiveness in managing various diseases, including cancer, malaria, and cardiovascular issues, highlighting their broad pharmacological applications in the field of theranostics.
View Article and Find Full Text PDF

Lam (syn. .) leaves are globally acclaimed for their nutritional content and mitigation of malnutrition.

View Article and Find Full Text PDF
Article Synopsis
  • * They can be categorized based on how they're made and their ingredients, with recent developments focusing on enhancing their ability to deliver drugs effectively, especially for brain-related diseases.
  • * This review highlights new research on cross-linked gels, including both injectable and non-injectable forms, and their potential impact on treating central nervous system conditions.
View Article and Find Full Text PDF
Article Synopsis
  • * New innovations in drug delivery systems using nanotechnology are being explored to enhance the effectiveness of ocular treatments by circumventing these barriers, particularly through the use of stimuli-responsive nano-drug carriers.
  • * These advanced carriers respond to specific biological triggers, offering improved treatment efficacy with fewer side effects, creating opportunities for development and clinical application in both ocular diseases and other topical treatment areas.
View Article and Find Full Text PDF

Development of nanomaterials for drug delivery has received considerable attention due to their potential for achieving on-target delivery to the diseased area while the surrounding healthy tissue is spared. Safe and efficiently delivered payloads have always been a challenge in pharmaceutics. Niosomes are self-assembled vesicular nanocarriers formed by hydration of a non-ionic surfactant, cholesterol or other molecules that combine to form a versatile drug delivery system with a variety of applications ranging from topical delivery to targeted delivery.

View Article and Find Full Text PDF

Wounds are a consequence of disruption in the structure, integrity, or function of the skin or tissue. Once a wound is formed following mechanical or chemical damage, the process of wound healing is initiated, which involves a series of chemical signaling and cellular mechanisms that lead to regeneration and/or repair. Disruption in the healing process may result in complications; therefore, interventions to accelerate wound healing are essential.

View Article and Find Full Text PDF