Raphael Alolga

Dr. Raphael Alolga

China Pharmaceutical University

Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

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

Representative Publications

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23 May 2022 in Pharmaceutics
Verified
Journal Article
Open access
PDF file
TSTheodora Amanda Seidu
Theodora Amanda Seidu
PKPerpetua Takunda Kutoka
Perpetua Takunda Kutoka
DADorothy Owusu Asante
Dorothy Owusu Asante
MFMuhammad Asim Farooq
Muhammad Asim Farooq
RARaphael Alolga
Raphael Alolga
WBWang Bo
Wang Bo
Research into the application of nanocarriers in the delivery of cancer-fighting drugs has been a promising research area for decades. On the other hand, their cytotoxic effects on cells, low uptake efficiency, and therapeutic resistance have limited their therapeutic use. However, the urgency of pressing healthcare needs has resulted in the functionalization of nanoparticles’ (NPs) physicochemical properties to improve clinical outcomes of new, old, and repurposed drugs. This article reviews recent research on methods for targeting functionalized nanoparticles to the tumor microenvironment (TME). Additionally, the use of relevant engineering techniques for surface functionalization of nanocarriers (liposomes, dendrimers, and mesoporous silica) and their critical roles in overcoming the current limitations in cancer therapy—targeting ligands used for targeted delivery, stimuli strategies, and multifunctional nanoparticles—were all reviewed. The limitations and future perspectives of functionalized nanoparticles were also finally discussed. Using relevant keywords, published scientific literature from all credible sources was retrieved. A quick search of the literature yielded almost 400 publications. The subject matter of this review was addressed adequately using an inclusion/exclusion criterion. The content of this review provides a reasonable basis for further studies to fully exploit the potential of these nanoparticles in cancer therapy.

28 June 2022 in Antioxidants
Verified
Journal Article
Open access
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RARaphael Alolga
Raphael Alolga
FWFeizuo Wang
Feizuo Wang
XZXinyao Zhang
Xinyao Zhang
JLJia Li
Jia Li
Lam-Son Phan TranLam-Son Phan Tran
Lam-Son Phan Tran
Xiaojian YinXiaojian Yin
Xiaojian Yin
The Zingiberaceae family is a rich source of diverse bioactive phytochemicals. It comprises about 52 genera and 1300 species of aromatic flowering perennial herbs with characteristic creeping horizontal or tuberous rhizomes. Notable members of this family include ginger (Zingiber officinale Roscoe), turmeric (Curcuma longa L.), Javanese ginger (Curcuma zanthorrhiza Roxb.), and Thai ginger (Alpinia galanga L.). This review focuses on two main classes of bioactive compounds: the gingerols (and their derivatives) and the curcuminoids. These compounds are known for their antioxidant activity against several maladies. We highlight the centrality of their antioxidant activities with notable biological activities, including anti-inflammatory, antidiabetic, hepatoprotective, neuroprotective, antimicrobial, and anticancer effects. We also outline various strategies that have been applied to enhance these activities and make suggestions for research areas that require attention.

1 May 2021 in Food Chemistry
Verified
Journal Article
Closed access
RARaphael Alolga
Raphael Alolga
RORichard Osae
Richard Osae
GEGLORIA Ladjeh ESSILFIE
GLORIA Ladjeh ESSILFIE
FSFiribu Kwasi Saalia
Firibu Kwasi Saalia
SASelorm Akaba
Selorm Akaba
FCFadzai Chikari
Fadzai Chikari

23 May 2019 in Molecules
Verified
Journal Article
Open access
PDF file
XYXiaojian Yin
Xiaojian Yin
MLMaría A.S.C. Chávez León
María A.S.C. Chávez León
RORichard Osae
Richard Osae
LLLoveth O. Linus
Loveth O. Linus
LQLian-Wen Qi
Lian-Wen Qi
RARaphael Alolga
Raphael Alolga
Aside from its multiple medicinal uses, the fruit of Xylopia aethiopica is widely used in Africa as food. Herein, we characterize the protein profiles, mineral content and bioactive phytochemical composition of the seeds of this plant sourced in Ghana and Nigeria. Using label-free proteomics, a total of 677 proteins were identified, with 260 found in the Ghana-sourced samples while 608 proteins were detected in the samples from Nigeria. However, 114 proteins were common between the samples from the two countries, among which 48 were significantly changed. Bioinformatics and functional analyses revealed that the differential levels of the proteins were mainly linked to pathways involved amino acids metabolism and biosynthesis. The significantly changed proteins related mainly to catalytic activity and carbon metabolism. The samples from Nigeria also exhibited superior qualities in terms of their antioxidant effects, and total phenolic and flavonoid content. Finally, only the content of Na varied to a statistically significant level. This study lends support to its culinary use and hints towards the impact of location of cultivation on the quality of the seeds. There is however need for further mechanistic investigations to unravel the underlying reasons for the observed differences.

3 April 2021 in Journal of Pharmacy and Pharmacology
Verified
Journal Article
Open access
PDF file
JRJaniqua Rolle
Janiqua Rolle
DADorothy O Asante
Dorothy O Asante
LKLinsey L Kok-Fong
Linsey L Kok-Fong
HBHamza Boucetta
Hamza Boucetta
TSTheodora A Seidu
Theodora A Seidu
RARaphael Alolga
Raphael Alolga
Jatrorrhizine is an isoquinoline alkaloid found in medicinal plants. It is the main bioactive compound of the Chinese herbs, Coptis chinensis, Rhizoma coptidis, and Phellodendron chinense Schneid, plants that are predominantly used in traditional Chinese medicine (TCM) for the treatment of metabolic disorders, gastritis, stomachache among a host of others. This manuscript aims to provide a comprehensive review of the pharmacological effects of jatrorrhizine, proffer suggestions on research areas that need redress and potentially serve as a reference for future studies. Published scientific literature was therefore retrieved from all credible sources including Pubmed, Elsevier, Research Gate, Web of Science, Google Scholar, Science Direct, Europe PMC and Wiley Online library using key words such as ‘jatrorrhizine’, ‘botanical sources’, ‘pharmacology’, ‘toxicology’, ‘pharmacokinetics’ or their combinations. A cursory examination of relevant scientific literature using the aforementioned key words produced more than 400 publications. Using an inclusion/exclusion criteria the subject matter of this review was adequately addressed. It is our hope that this review will provide a good platform for further research on fully harnessing the potential of this bioactive compound.

1 October 2019 in Journal of Pharmacy and Pharmacology
Verified
Journal Article
Closed access
RARaphael Alolga
Raphael Alolga
MLMaría A S C Chávez León
María A S C Chávez León
GOGeorge Osei-Adjei
George Osei-Adjei
VOVitus Onoja
Vitus Onoja