Marissa Balmith

Dr. Marissa Balmith


Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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8 July 2024 in Clinical Therapeutics
Verified
Journal Article
Open access
LNLinda Nene
Linda Nene
BFBrian Thabile Flepisi
Brian Thabile Flepisi
SBSarel Jacobus Brand
Sarel Jacobus Brand
CBCharlise Basson
Charlise Basson
MBMarissa Balmith
Marissa Balmith
Artificial intelligence (AI) refers to technology capable of mimicking human cognitive functions and has important applications across all sectors and industries, including drug development. This has considerable implications for the regulation of drug development processes, as it is expected to transform both the way drugs are brought to market and the systems through which this process is controlled. There is currently insufficient evidence in published literature of the real-world applications of AI. Therefore, this narrative review investigated, collated, and elucidated the applications of AI in drug development and its regulatory processes. A narrative review was conducted to ascertain the role of AI in streamlining drug development and regulatory processes. The findings of this review revealed that machine learning or deep learning, natural language processing, and robotic process automation were favored applications of AI. Each of them had considerable implications on the operations they were intended to support. Overall, the AI tools facilitated access and provided manageability of information for decision-making across the drug development lifecycle. However, the findings also indicate that additional work is required by regulatory authorities to set out appropriate guidance on applications of the technology, which has critical implications for safety, regulatory process workflow and product development costs. AI has adequately proven its utility in drug development, prompting further investigations into the translational value of its utility based on cost and time saved for the delivery of essential drugs.

23 February 2024 in Journal of Tropical Medicine
Verified
Journal Article
Open access
PDF file
MBMarissa Balmith
Marissa Balmith
CBCharlise Basson
Charlise Basson
SBSarel J. Brand
Sarel J. Brand
Malaria is a deadly disease caused by protozoan pathogens of the Plasmodium parasite. Transmission to humans occurs through the bite of an infected female Anopheles mosquito. According to the World Health Organization (WHO), an estimated 247 million cases of malaria were recorded worldwide in 2021, with approximately 619 000 malaria deaths. The initial signs of malaria can be mild and challenging to diagnose due to the signs and symptoms being similar to those of other illnesses. The malaria burden remains largely concentrated in the WHO sub-Saharan African region and has been recognised as a significant contributor to morbidity and mortality. This review aims to contribute to the existing knowledge on malaria in South Africa, a region within sub-Saharan Africa, focusing on the epidemiology and life cycle of the malaria parasite as well as diagnostic approaches for detecting malaria. In addition, nonpharmacological and pharmacological interventions for treating and preventing malaria infections will also be discussed herein. While there has been a significant reduction in the global burden of this disease, malaria remains a public health issue in South Africa. As such, the implementation of effective preventative measures and strategies, early diagnosis, and appropriate treatment regimens are crucial to reducing the malaria burden in South Africa.

15 March 2024 in International Journal of Dental Hygiene
Verified
Journal Article
Open access
MBMarissa Balmith
Marissa Balmith
WCWerner Cordier
Werner Cordier
ABAhmed Bhayat
Ahmed Bhayat
CBCharlise Basson
Charlise Basson
MMM. Morule
M. Morule
Natalie SchellackNatalie Schellack
Natalie Schellack
Introduction: Pharmacology is an increasingly important area of study for oral hygienists, as it provides the scientific basis for safe and effective oral healthcare. However, a lack of fundamental understanding of the discipline among clinical graduates can present significant challenges. Oral hygienists require pharmacological training to meet the requirements of their scope of practice. Pharmacology knowledge assists with the diagnosis and treatment of oral conditions and forms the foundation for further clinical competency development. The knowledge and perceptions of pharmacology for pharmacy, nursing and medical students have been well documented; however, little information is present for Bachelor of Oral Hygiene (BOH) students. This paper sets out to evaluate BOH students' and recent graduates' knowledge and perceptions of pharmacology at a single higher institution in Pretoria to identify possible gaps and weaknesses.Methods: A cross‐sectional study design was used to collect data using an online questionnaire. The English‐language questionnaire consisted of the self‐reported perceptions and knowledge and actual knowledge of pharmacology of undergraduate BOH students and recent graduates. The questionnaire consisted of multiple choice questions, true or false questions and Likert scale questions. Ethics was obtained from the institution's Research Ethics Committee (REC 350/2021).Results: Overall, the participants perceived the pharmacology module positively and understood its importance. Concerns were raised about insufficient time for studying and that assessments were more aligned to gaining factual knowledge than the development of problem‐solving skills. Students rated their knowledge between 57.24% and 69.44%, with BOH III students and graduates having a statistically significant greater self‐rated knowledge of antivirals, antifungals and common agents used to treat oral conditions in comparison with BOH I and BOH II students. Overall, BOH students and graduates' actual knowledge was between 45.24% and 66.84%. Although not statistically significant, the total self‐rated knowledge of BOH III students and recent graduates tended to be higher than their actual knowledge. Knowledge deficits were evident with some pharmacological concepts across the various BOH groups, such as pharmacokinetics, pain, drugs altering dental treatment I: central nervous system drugs, drugs altering dental treatment II: respiratory and endocrine drugs, drugs altering dental treatment III: cardiovascular drugs, drug–drug interactions and common agents used to treat oral conditions.Conclusion: Self‐rated knowledge deficiencies were noted by students and recent graduates for certain pharmacological concepts and were supported by the measurement of their actual knowledge. Further investigation into knowledge deficiencies is needed to guide curriculum review to further strengthen oral hygienists' pharmacological competencies and ensure alignment to their scope of practice.

Verified
Journal Article
Open access
PDF file
Khomotso Madimetsa MmakolaKhomotso Madimetsa Mmakola
Khomotso Madimetsa Mmakola
MBMarissa Balmith
Marissa Balmith
HSHelen Steel
Helen Steel
MSMohamed Said
Mohamed Said
MPMoliehi Potjo
Moliehi Potjo
MCMoloko Cholo
Moloko Cholo
Multidrug-resistant tuberculosis (MDR-TB) patients are treated with a standardised, short World Health Organization (WHO) regimen which includes clofazimine (CFZ) and bedaquiline (BDQ) antibiotics. These two antibiotics lead to the development of QT prolongation in patients, inhibiting potassium (K+) uptake by targeting the voltage-gated K+ (Kv)11.1 (hERG) channel of the cardiomyocytes (CMs). However, the involvement of these antibiotics to regulate other K+ transporters of the CMs, as potential mechanisms of QT prolongation, has not been explored. This study determined the effects of CFZ and BDQ on sodium, potassium–adenosine triphosphatase (Na+,K+-ATPase) activity of CMs using rat cardiomyocytes (RCMs). These cells were treated with varying concentrations of CFZ and BDQ individually and in combination (1.25–5 mg/L). Thereafter, Na+,K+-ATPase activity was determined, followed by intracellular adenosine triphosphate (ATP) quantification and cellular viability determination. Furthermore, molecular docking of antibiotics with Na+,K+-ATPase was determined. Both antibiotics demonstrated dose–response inhibition of Na+,K+-ATPase activity of the RCMs. The greatest inhibition was demonstrated by combinations of CFZ and BDQ, followed by BDQ alone and, lastly, CFZ. Neither antibiotic, either individually or in combination, demonstrated cytotoxicity. Molecular docking revealed an interaction of both antibiotics with Na+,K+-ATPase, with BDQ showing higher protein-binding affinity than CFZ. The inhibitory effects of CFZ and BDQ, individually and in combination, on the activity of Na+,K+-ATPase pump of the RCMs highlight the existence of additional mechanisms of QT prolongation by these antibiotics.