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Efficacy and Safety of Cissus quadrangularis L. in Clinical Use: A Systematic Review and Meta-analysis of Randomized Controlled Trials

Sawangjit R, Puttarak P, Saokaew S, Chaiyakunapruk N

Phytother Res, 2017 Apr;31(4):555-567.
PMID: 28165166 DOI: 10.1002/ptr.5783

Cissus quadrangularis L. (Cissus) is a medicinal plant commonly used for centuries for various conditions, but lacks critical appraisal of its clinical effects. This study aimed to determine the efficacy and safety of Cissus in all conditions. Publications from 12 electronic databases were searched from inception through November 2016. A total of nine studies with 1108 patients were included. Each outcome was pooled using a random effects model. Effects of Cissus on hemorrhoid symptoms were not different from any comparators but had significant effects on bone pain. Effects of Cissus combination products on body weight reduction, low-density lipoprotein, triglyceride, total cholesterol, and fasting blood sugar were superior to placebo, with weighted mean difference of -5.19 kg (-8.82, -1.55), -14.43 mg/dl (-20.06, -8.80), -37.50 mg/dl (-48.71, -26.29), -50.50 mg/dl (-70.97, -30.04), and -10.39 mg/dl (-14.60, -6.18), respectively. No serious adverse effects were reported. Quality of evidence based on Grades of Recommendations Assessment Development and Evaluation (GRADE) indicated low (bone fractures) to high quality (hemorrhoids, body weight reduction).In conclusion, Cissus had benefit for bone fractures, but not for hemorrhoids. For obesity/overweight, only combination products are pooled and show benefit. However, high-quality studies remain needed. Copyright © 2017 John Wiley & Sons, Ltd.

Matched MeSH terms: Biological Products/chemistry*
Fulltext Antitumour Activities of Selected Pure Compounds Identified from the Serum of Crocodylus porosus, Malayopython reticulatus, Varanus salvator and Cuora kamaroma amboinensis

Jeyamogan S, Khan NA, Siddiqui R

Asian Pac J Cancer Prev, 2021 Feb 12;22(S1):97-106.
PMID: 33576218 DOI: 10.31557/APJCP.2021.22.S1.97

OBJECTIVES: Here we determined antitumour effects of purified compounds such as Valdecoxib, Rofecoxib, L-Methionine and Artocarpin against cancer cell lines.
METHODS: Using purified compounds, assays were performed to determine their effects against cancer cell lines using growth inhibition assays, cytotoxicity assays, and cell survival assays against HeLa, PC3 and MCF7 cells.
RESULTS: The results showed that the selected small molecules L-Methionine, Rofecoxib, and Artocarpin suppressed the growth of more than 90% PC3 cells at 40µM. Similarly, Valdecoxib alone and in combination with other molecules exhibited potent growth inhibition and cytotoxicity against cancer cells tested. Peptide from the serum of M. reticulatus, demonstrated selective cytotoxicity against cancer cells without inhibiting the growth of normal cells.
CONCLUSION: These findings are significant and provide a basis for the rational development of therapeutic anticancer agents, however intensive research is needed to determine in vivo effects of the identified molecules together with their mode of action to realize these expectations.
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Matched MeSH terms: Biological Products/pharmacology*
Fulltext A Systematic Review on Attenuation of PCSK9 in Relation to Atherogenesis Biomarkers Associated with Natural Products or Plant Bioactive Compounds in In Vitro Studies: A Critique on the Quality and Imprecision of Studies

Zulkapli R, Yusof MYPM, Abd Muid S, Wang SM, Firus Khan AY, Nawawi H

Int J Environ Res Public Health, 2022 Oct 08;19(19).
PMID: 36232177 DOI: 10.3390/ijerph191912878

A systematic review was performed to identify all the related publications describing PCSK9 and atherogenesis biomarkers attenuation associated with a natural product and plant bioactive compounds in in vitro studies. This review emphasized the imprecision and quality of the included research rather than the detailed reporting of the results. Literature searches were conducted in Scopus, PubMed, and Science Direct from 2003 until 2021, following the Cochrane handbook. The screening of titles, abstracts, and full papers was performed by two independent reviewers, followed by data extraction and validity. Study quality and validity were assessed using the Imprecision Tool, Model, and Marker Validity Assessment that has been developed for basic science studies. A total of 403 articles were identified and 31 of those that met the inclusion criteria were selected. 13 different atherogenesis biomarkers in relation to PCSK9 were found, and the most studied biomarkers are LDLR, SREBP, and HNF1α. In terms of quality, our review suggests that the basic science study in investigating atherogenesis biomarkers is deficient in terms of imprecision and validity.

Matched MeSH terms: Biological Products*
Nanostructured Lipid Carriers for the Delivery of Natural Bioactive Compounds

Shamsuddin NAM, Zulfakar MH

Curr Drug Deliv, 2023;20(2):127-143.
PMID: 35331113 DOI: 10.2174/1567201819666220324094234

Natural products contain bioactive compounds that are produced naturally via synthetic or semisynthetic processes. These bioactive compounds play significant biological roles, especially for growth as well as in defense mechanisms against pathogens. Bioactive compounds in natural products have been extensively studied in recent decades for their pharmacological activities, such as anticancer, wound healing, anti-microbial, anti-inflammatory, and anti-oxidative properties. However, their pharmaceutical significance has always been hindered by their low bioavailability and instability with variations in pH, temperature, and exposure to light. Nanotechnology paves the way for the development of drug delivery systems by enhancing therapeutic efficacy. Nanostructured lipid carriers, a lipidbased drug delivery system, are recently being studied to improve the biocompatibility, biodegradability, bioavailability, solubility, permeability, and shelf life of bioactive compounds in the pharmaceutical industry. The ideal component and preparation method for bioactive compounds in nanostructured lipid carrier development is necessary for their physicochemical properties and therapeutic efficiency. Therefore, this review seeks to highlight recent developments, preparation, and application of nanostructured lipid carriers as carriers for natural bioactive compounds in improving their therapeutic potential in drug delivery systems.

Matched MeSH terms: Biological Products*
Fulltext Promising Natural Products in New Drug Design, Development, and Therapy for Skin Disorders: An Overview of Scientific Evidence and Understanding Their Mechanism of Action

Mohd Zaid NA, Sekar M, Bonam SR, Gan SH, Lum PT, Begum MY, et al.

Drug Des Devel Ther, 2022;16:23-66.
PMID: 35027818 DOI: 10.2147/DDDT.S326332

The skin is the largest organ in the human body, composed of the epidermis and the dermis. It provides protection and acts as a barrier against external menaces like allergens, chemicals, systemic toxicity, and infectious organisms. Skin disorders like cancer, dermatitis, psoriasis, wounds, skin aging, acne, and skin infection occur frequently and can impact human life. According to a growing body of evidence, several studies have reported that natural products have the potential for treating skin disorders. Building on this information, this review provides brief information about the action of the most important in vitro and in vivo research on the use of ten selected natural products in inflammatory, neoplastic, and infectious skin disorders and their mechanisms that have been reported to date. The related studies and articles were searched from several databases, including PubMed, Google, Google Scholar, and ScienceDirect. Ten natural products that have been reported widely on skin disorders were reviewed in this study, with most showing anti-inflammatory, antioxidant, anti-microbial, and anti-cancer effects as the main therapeutic actions. Overall, most of the natural products reported in this review can reduce and suppress inflammatory markers, like tumor necrosis factor-alpha (TNF-α), scavenge reactive oxygen species (ROS), induce cancer cell death through apoptosis, and prevent bacteria, fungal, and virus infections indicating their potentials. This review also highlighted the challenges and opportunities of natural products in transdermal/topical delivery systems and their safety considerations for skin disorders. Our findings indicated that natural products might be a low-cost, well-tolerated, and safe treatment for skin diseases. However, a larger number of clinical trials are required to validate these findings. Natural products in combination with modern drugs, as well as the development of novel delivery mechanisms, represent a very promising area for future drug discovery of these natural leads against skin disorders.

Matched MeSH terms: Biological Products/therapeutic use*
Regulatory Oversight of Cell and Gene Therapy Products in Malaysia

Loh EYX, Ab Ghani A, Ahmad R

Adv Exp Med Biol, 2023;1430:181-195.
PMID: 37526848 DOI: 10.1007/978-3-031-34567-8_10

The National Pharmaceutical Regulatory Agency (NPRA) is the agency responsible for the registration of pharmaceutical, natural, and health supplement products and notification of cosmetic products that are marketed in Malaysia. The implementation of regulatory oversight of the different types of product was in a progressive manner, with the latest addition to be regulated being the cell and gene therapy products (CGTPs), beginning January 1, 2021. CGTP can be classified as low risk (that does not require registration) or high risk (that needs to be registered). Generally, the regulation of high-risk CGTP is similar to other biological products. This chapter describes the chronology of the CGTP framework, classification of CGTP, how CGTPs fit into the current registration pathways and registration procedure, dossier requirements, and what is the current status and future direction of CGTP in Malaysia.

Matched MeSH terms: Biological Products*
Factors affecting therapeutic protein purity and yield during chromatographic purification

Che Hussian CHA, Leong WY

Prep Biochem Biotechnol, 2024 Feb;54(2):150-158.
PMID: 37233514 DOI: 10.1080/10826068.2023.2217507

Therapeutic proteins are recombinant proteins generated through recombinant DNA technology and have attracted a great deal of interest in numerous applications, including pharmaceutical, cosmetic, human and animal health, agriculture, food, and bioremediation. Producing therapeutic proteins on a large scale, mainly in the pharmaceutical industry, necessitates a cost-effective, straightforward, and adequate manufacturing process. In industry, a protein separation technique based mainly on protein characteristics and modes of chromatography will be applied to optimize the purification process. Typically, the downstream process of biopharmaceutical operations may involve multiple chromatography phases that require the use of large columns pre-packed with resins that must be inspected before use. Approximately 20% of the proteins are assumed to be lost at each purification stage during the production of biotherapeutic products. Hence, to produce a high quality product, particularly in the pharmaceutical industry, the correct approach and understanding of the factors influencing purity and yield during purification are necessary.

Matched MeSH terms: Biological Products*
Fulltext Bioactive compounds from nature: Antioxidants targeting cellular transformation in response to epigenetic perturbations induced by oxidative stress

Bouyahya A, Bakrim S, Aboulaghras S, El Kadri K, Aanniz T, Khalid A, et al.

Biomed Pharmacother, 2024 May;174:116432.
PMID: 38520868 DOI: 10.1016/j.biopha.2024.116432

Oxidative stress results from a persistent imbalance in oxidation levels that promotes oxidants, playing a crucial role in the early and sustained phases of DNA damage and genomic and epigenetic instability, both of which are intricately linked to the development of tumors. The molecular pathways contributing to carcinogenesis in this context, particularly those related to double-strand and single-strand breaks in DNA, serve as indicators of DNA damage due to oxidation in cancer cases, as well as factors contributing to epigenetic instability through ectopic expressions. Oxidative stress has been considered a therapeutic target for many years, and an increasing number of studies have highlighted the promising effectiveness of natural products in cancer treatment. In this regard, we present significant research on the therapeutic targeting of oxidative stress using natural molecules and underscore the essential role of oxidative stress in cancer. The consequences of stress, especially epigenetic instability, also offer significant therapeutic prospects. In this context, the use of natural epi-drugs capable of modulating and reorganizing the epigenetic network is beginning to emerge remarkably. In this review, we emphasize the close connections between oxidative stress, epigenetic instability, and tumor transformation, while highlighting the role of natural substances as antioxidants and epi-drugs in the anti-tumoral context.

Matched MeSH terms: Biological Products/pharmacology
Jewel of the seabed: sea cucumbers as nutritional and drug candidates

Kiew PL, Don MM

Int J Food Sci Nutr, 2012 Aug;63(5):616-36.
PMID: 22149726 DOI: 10.3109/09637486.2011.641944

Marine sources have been attracting the attention of scientists and manufacturers worldwide hoping to find new alternatives for biological active substances. Promising new research indicates that sea cucumber, which is slug-like in appearance and has been a staple in Japan, China and other parts of East Asia since ancient times, is beginning to gain popularity as a dietary supplement in western countries. The roles of sea cucumber extracts in various physiological functions have spurred researchers to investigate the ability of sea cucumber to be an alternative in neutraceutical and medical applications. This article provides a brief introduction to sea cucumber and reviews its numerous bioactive compounds, such as triterpene glycosides, glycosaminoglycans, gangliosides, collagen, branched-chain fatty acid and lectins, which serve as potential sources of neutraceutical, pharmaceutical and cosmetic agents, thus providing a new platform in biochemical research.

Matched MeSH terms: Biological Products/pharmacology; Biological Products/therapeutic use*; Biological Products/chemistry
Natural diterpene pyrones: chemistry and biology

Al-Khdhairawi AAQ, Cordell GA, Thomas NF, Shivanagere Nagojappa NB, Weber JF

Org Biomol Chem, 2019 10 28;17(40):8943-8957.
PMID: 31482157 DOI: 10.1039/c9ob01501a

Diterpene pyrones (DTPs) are a group of well-known, mainly fungal, natural products, first isolated in 1966. As the name indicates, they are composed of two main structural features: a diterpenyl moiety and a pyrone ring. Various names have been given to this class of metabolites; however, biogenetic evidence indicates that they originate through the same metabolic pathway. Based on their biosynthesis, which leads to differences in their structural architecture, the DTPs can be classified into three main types. In addition to their intriguing chemistry, these compounds demonstrate a wide range of biological activities rendering them a desirable target for total synthesis. To date, sixty-seven DTPs have been isolated from various fungal species, with one example originating from the plant kingdom. This review aims at unifying the classification of these compounds, in addition to presenting a detailed description of their isolation, bioactivities, biosynthesis, and total synthesis.

Matched MeSH terms: Biological Products/chemical synthesis; Biological Products/metabolism*; Biological Products/chemistry*
Fulltext Prospective stem cell lines as in vitroneurodegenerative disease models for natural product research

Nur Izzati Mansor, Nuratiqah Azmi, Ling, King-Hwa, Rozita Rosli, Zurina Hassan, Norshariza Nordin

Neuroscience Research Notes, 2019;2(1):16-30.
MyJurnal

The use of in vitromodel for screening pharmacological compounds or natural products has gained global interest. The choice of cells to be manipulated plays a vital role in coming up with the best-suitedmodel for specific diseases, including neurodegenerativediseases (ND). A good in vitro ND model should provide appropriate morphological and molecular features that mimic ND conditions where it can be used to screen potential properties of natural products in addition to unravelling the molecular mechanisms of ND. In this mini review, we intend to demonstrate two prospective stem cell lines as the potential cell source for in vitroND model and compare them to the commonly used cells. The common source of cells that have been usedas the in vitroND models is discussedbefore going into details talking about the two prospective stem cell lines.

Matched MeSH terms: Biological Products
Fulltext Properties of canned mengkudu (Morinda citrifolia L.) extract during storage

Noor Hafizah, Y, Maskat, M. Y., Wan Aida, W. M., Maaruf, A. G.

International Food Research Journal, 2012;19(3):1211-1215.
MyJurnal

Storage study of mengkudu (Morinda citrifolia L.) extract was carried out to determine the effects
of canning and storage period on pH, total polyphenol content, antioxidant activity, intensity of off-odour and aroma acceptance. Uncanned (control) and canned extract were stored for 0, 8, 16 and 24 weeks under room temperature. Results showed canning resulted in a significant (p

Matched MeSH terms: Biological Products
Role of Antioxidants and Natural Products in Inflammation

Arulselvan P, Fard MT, Tan WS, Gothai S, Fakurazi S, Norhaizan ME, et al.

Oxid Med Cell Longev, 2016;2016:5276130.
PMID: 27803762

Inflammation is a comprehensive array of physiological response to a foreign organism, including human pathogens, dust particles, and viruses. Inflammations are mainly divided into acute and chronic inflammation depending on various inflammatory processes and cellular mechanisms. Recent investigations have clarified that inflammation is a major factor for the progression of various chronic diseases/disorders, including diabetes, cancer, cardiovascular diseases, eye disorders, arthritis, obesity, autoimmune diseases, and inflammatory bowel disease. Free radical productions from different biological and environmental sources are due to an imbalance of natural antioxidants which further leads to various inflammatory associated diseases. In this review article, we have outlined the inflammatory process and its cellular mechanisms involved in the progression of various chronic modern human diseases. In addition, we have discussed the role of free radicals-induced tissue damage, antioxidant defence, and molecular mechanisms in chronic inflammatory diseases/disorders. The systematic knowledge regarding the role of inflammation and its associated adverse effects can provide a clear understanding in the development of innovative therapeutic targets from natural sources that are intended for suppression of various chronic inflammations associated diseases.

Matched MeSH terms: Biological Products/pharmacology; Biological Products/therapeutic use*; Biological Products/chemistry
Animal models and natural products to investigate in vivo and in vitro antidiabetic activity

Hasan MM, Ahmed QU, Mat Soad SZ, Tunna TS

Biomed Pharmacother, 2018 May;101:833-841.
PMID: 29635892 DOI: 10.1016/j.biopha.2018.02.137

Diabetes mellitus is a chronic disease which has high prevalence. The deficiency in insulin production or impaired insulin function is the underlying cause of this disease. Utilization of plant sources as a cure of diabetes has rich evidence in the history. Recently, the traditional medicinal plants have been investigated scientifically to understand the underlying mechanism behind antidiabetic potential. In this regard, a substantial number of in vivo and in vitro models have been introduced for investigating the bottom-line mechanism of the antidiabetic effect. A good number of methods have been reported to be used successfully to determine antidiabetic effects of plant extracts or isolated compounds. This review encompasses all the possible methods with a list of medicinal plants which may contribute to discovering a novel drug to treat diabetes more efficaciously with the minimum or no side effects.

Matched MeSH terms: Biological Products/pharmacology; Biological Products/therapeutic use*; Biological Products/chemistry
Alzheimer's Disease and Natural Products: Future Regimens Emerging from Nature

Islam MA, Khandker SS, Alam F, Khalil MI, Kamal MA, Gan SH

Curr Top Med Chem, 2017;17(12):1408-1428.
PMID: 28049401 DOI: 10.2174/1568026617666170103163054

Alzheimer's disease (AD), which largely affects the elderly, has become a global burden. Patients with AD have both short- and long-term memory impairments. The neuronal loss in AD occurs due to abnormally folded amyloid beta proteins and aggregation of hyperphosphorylated tau proteins in the brain. Eventually, amyloid plaques and neurofibrillary tangles are formed, which subsequently disintegrate the neuronal transport system. There are several factors which are involved in AD pathogenesis, including oxidative stress, inflammation and the presence of metal ions. The modern therapies utilized for AD treatment have many adverse effects, driving the quest for more safe and effective medications. Many dietary components, including different types of fruits, vegetables, spices, and marine products as well as a Mediterranean diet, are a good source of antioxidants and have anti-inflammatory properties, with many showing substantial potential against AD pathogenesis. In this review, we discuss the potential of these foods for treating AD and opportunities for developing disease-targeted drugs from active compounds extracted from natural dietary products.

Matched MeSH terms: Biological Products/adverse effects; Biological Products/isolation & purification; Biological Products/pharmacology*
Actinobacteria-a promising natural source of anti-biofilm agents

Azman AS, Mawang CI, Khairat JE, AbuBakar S

Int Microbiol, 2019 Dec;22(4):403-409.
PMID: 30847714 DOI: 10.1007/s10123-019-00066-4

A biofilm is a community of microorganisms attached to a surface and embedded in a matrix of extracellular polymeric substances. Biofilms confer resistance towards conventional antibiotic treatments; thus, there is an urgent need for newer and more effective antimicrobial agents that can act against these biofilms. Due to this situation, various studies have been done to investigate the anti-biofilm effects of natural products including bioactive compounds extracted from microorganisms such as Actinobacteria. This review provides an insight into the anti-biofilm potential of Actinobacteria against various pathogenic bacteria, which hopefully provides useful information, guidance, and improvements for future antimicrobial studies. Nevertheless, further research on the anti-biofilm mechanisms and compound modifications to produce more potent anti-biofilm effects are required.

Matched MeSH terms: Biological Products/metabolism; Biological Products/pharmacology*; Biological Products/chemistry
Metabolomics-Guided Isolation of Anti-Trypanosomal Compounds from Endophytic Fungi of the Mangrove plant Avicennia Lanata

Mazlan NW, Tate R, Yusoff YM, Clements C, Edrada-Ebel R

Curr Med Chem, 2020;27(11):1815-1835.
PMID: 31272343 DOI: 10.2174/0929867326666190704130105

Endophytic fungi have been explored not just for their ecological functions but also for their secondary metabolites as a new source of these pharmacologically active natural products. Accordingly, many structurally unique and biologically active compounds have been obtained from the cultures of endophytic fungi. Fusarium sp. and Lasiodiplodia theobromae were isolated from the root and stem of the mangrove plant Avicennia lanata, respectively, collected from Terengganu, Malaysia. High-resolution mass spectrometry and NMR spectroscopy were used as metabolomics profiling tools to identify and optimize the production of bioactive secondary metabolites in both strains at different growth stages and culture media. The spectral data was processed by utilizing Mzmine 2, a quantitative expression analysis software and an in house MS-Excel macro coupled with the Dictionary of Natural Products databases for dereplication studies. The investigation for the potential bioactive metabolites from a 15-day rice culture of Fusarium sp. yielded four 1,4- naphthoquinone with naphthazarin structures (1-4). On the other hand, the endophytic fungus L. theobromae grown on the 15-day solid rice culture produced dihydroisocoumarins (5-8). All the isolated compounds (1-8) showed significant activity against Trypanosoma brucei brucei with MIC values of 0.32-12.5 µM. Preliminary cytotoxicity screening against normal prostate cells (PNT2A) was also performed. All compounds exhibited low cytotoxicity, with compounds 3 and 4 showing the lowest cytotoxicity of only 22.3% and 38.6% of the control values at 100 µg/mL, respectively. Structure elucidation of the isolated secondary metabolites was achieved using 2D-NMR and HRESI-MS as well as comparison with literature data.

Matched MeSH terms: Biological Products
Fulltext Genomic Comparisons Reveal Microevolutionary Differences in Mycobacterium abscessus Subspecies

Tan JL, Ng KP, Ong CS, Ngeow YF

Front Microbiol, 2017;8:2042.
PMID: 29109707 DOI: 10.3389/fmicb.2017.02042

Mycobacterium abscessus, a rapid-growing non-tuberculous mycobacterium, has been the cause of sporadic and outbreak infections world-wide. The subspecies in M. abscessus complex (M. abscessus, M. massiliense, and M. bolletii) are associated with different biologic and pathogenic characteristics and are known to be among the most frequently isolated opportunistic pathogens from clinical material. To date, the evolutionary forces that could have contributed to these biological and clinical differences are still unclear. We compared genome data from 243 M. abscessus strains downloaded from the NCBI ftp Refseq database to understand how the microevolutionary processes of homologous recombination and positive selection influenced the diversification of the M. abscessus complex at the subspecies level. The three subspecies are clearly separated in the Minimum Spanning Tree. Their MUMi-based genomic distances support the separation of M. massiliense and M. bolletii into two subspecies. Maximum Likelihood analysis through dN/dS (the ratio of number of non-synonymous substitutions per non-synonymous site, to the number of synonymous substitutions per synonymous site) identified distinct genes in each subspecies that could have been affected by positive selection during evolution. The results of genome-wide alignment based on concatenated locally-collinear blocks suggest that (a) recombination has affected the M. abscessus complex more than mutation and positive selection; (b) recombination occurred more frequently in M. massiliense than in the other two subspecies; and (c) the recombined segments in the three subspecies have come from different intra-species and inter-species origins. The results lead to the identification of possible gene sets that could have been responsible for the subspecies-specific features and suggest independent evolution among the three subspecies, with recombination playing a more significant role than positive selection in the diversification among members in this complex.

Matched MeSH terms: Biological Products
Fulltext Wear Debris Characterization and Corresponding Biological Response: Artificial Hip and Knee Joints

Nine MJ, Choudhury D, Hee AC, Mootanah R, Osman NAA

Materials (Basel), 2014 Feb 10;7(2):980-1016.
PMID: 28788496 DOI: 10.3390/ma7020980

Wear debris, of deferent sizes, shapes and quantities, generated in artificial hip and knees is largely confined to the bone and joint interface. This debris interacts with periprosthetic tissue and may cause aseptic loosening. The purpose of this review is to summarize and collate findings of the recent demonstrations on debris characterization and their biological response that influences the occurrence in implant migration. A systematic review of peer-reviewed literature is performed, based on inclusion and exclusion criteria addressing mainly debris isolation, characterization, and biologic responses. Results show that debris characterization largely depends on their appropriate and accurate isolation protocol. The particles are found to be non-uniform in size and non-homogeneously distributed into the periprosthetic tissues. In addition, the sizes, shapes, and volumes of the particles are influenced by the types of joints, bearing geometry, material combination, and lubricant. Phagocytosis of wear debris is size dependent; high doses of submicron-sized particles induce significant level of secretion of bone resorbing factors. However, articles on wear debris from engineered surfaces (patterned and coated) are lacking. The findings suggest considering debris morphology as an important parameter to evaluate joint simulator and newly developed implant materials.

Matched MeSH terms: Biological Products
Optimization of deacidification process for Morinda citrifolia extracts using packed column of calcium carbonate

Nur Hafiza, Z., Maskat, M.Y., Wan Aida, W.M., Osman, H.

International Food Research Journal, 2010;17(4):1051-1066.
MyJurnal

A study was carried out to optimize the deacidification process for noni (Morinda citrifolia L.) extract using packed column of calcium carbonate. The experiments were based on a 3-level factorial design to study the optimum process of deacidification for M. citrifolia extract. The M. citrifolia extract was treated with CaCO3 packed in different column diameter (20, 25 and 30 mm), height of calcium carbonate (0, 0.5 and 1 cm) and feed rate (10, 30 and 50 ml/min). Physico-chemical characteristics which include pH, titratable acidity, turbidity, total polyphenol content and total soluble solids were measured. Results showed that only pH, titratable acidity and turbidity could be well represented using statistical models. For pH, only the effect of height of CaCO3 was found to be significant. While for titratable acidity and turbidity, effects of diameter column and height of CaCO3 were significant. The optimum conditions for the deacidification of M. citrifolia extract was by using a column diameter of 30 mm, CaCO3 height of 1 cm, and a feed rate of 50 ml/min.

Matched MeSH terms: Biological Products

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