Isaac O. Afara's research while affiliated with The University of Queensland and other places

Publications (10)

Article
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In order to improve the ability of clinical diagnosis to differentiate articular cartilage (AC) injury of different origins, this study explores the sensitivity of mid-infrared (MIR) spectroscopy for detecting structural, compositional, and functional changes in AC resulting from two injury types. Three grooves (two in parallel in the palmar-dorsal...
Article
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Osteoarthritis (OA) is a debilitating degenerative disease affecting multiple joint tissues, including cartilage, bone, synovium, and adipose tissues. OA presents diverse clinical phenotypes and distinct molecular endotypes, including inflammatory, metabolic, mechanical, genetic, and synovial variants. Consequently, innovative technologies are need...
Article
Full-text available
Significance Articular cartilage exhibits a zonal architecture, comprising three distinct zones: superficial, middle, and deep. Collagen fibers, being the main solid constituent of articular cartilage, exhibit unique angular and size distribution in articular cartilage zones. There is a gap in knowledge on how the unique properties of collagen fibe...
Article
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Non-destructive assessments are required for the quality control of tissue-engineered constructs and the optimization of the tissue culture process. Near-infrared (NIR) spectroscopy coupled with machine learning (ML) provides a promising approach for such assessment. However, due to its nonspecific nature, each spectrum incorporates information on...
Article
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Introduction Visual assessment and imaging of the donor liver are inaccurate in predicting fibrosis and remain surrogates for histopathology. We demonstrate that 3‐s scans using a handheld near‐infrared‐spectroscopy (NIRS) instrument can identify and quantify fibrosis in fresh human liver samples. Methods We undertook NIRS scans on 107 samples fro...
Article
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Mid-infrared spectroscopy (MIR), near-infrared spectroscopy (NIR), and Raman spectroscopy are all well-established analytical techniques in biomedical applications. Since they provide complementary chemical information, we aimed to determine whether combining them amplifies their strengths and mitigates their weaknesses. This study investigates the...
Article
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Osteoarthritis degenerates cartilage and impairs joint function. Early intervention opportunities are missed as current diagnostic methods are insensitive to early tissue degeneration. We investigated the capability of visible light-near-infrared spectroscopy (Vis-NIRS) to differentiate normal human cartilage from early osteoarthritic one. Vis-NIRS...
Article
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Objective To differentiate healthy from artificially degraded articular cartilage and estimate its structural, compositional, and functional properties using Raman spectroscopy (RS). Design Visually normal bovine patellae ( n = 12) were used in this study. Osteochondral plugs ( n = 60) were prepared and artificially degraded either enzymatically (...
Article
Full-text available
To assess whether articular cartilage changes in an equine model of post traumatic osteoarthritis (PTOA), induced by surgical creation of standard (blunt) grooves, and very subtle sharp grooves, could be detected with ex vivo T1 relaxation time mapping utilizing 3-D readout sequence with zero echo time. Grooves were made on the articular surfaces o...

Citations

... Previously, CRISPR-Cas9 has been used to modify GSL glycans on leukocyte cells [81], and it might be useful for regenerating cartilage [82]. The multi-omics of cartilage from a spatio-temporal perspective is currently of vital interest [83,84]. On the other hand, spatial and temporal analysis of glycome expression patterns on tissues is limited to N-glycans due to technical difficulties [85][86][87][88]. ...
... Of note, NIR spectroscopy has gained increasing recognition in human medical research [21], particularly for screening pathological kidney tissues and conditions associated with fibrotic and steatotic liver diseases [22][23][24]. The versatility of this technique has also been proven in veterinary medicine and meat inspection, where NIR and ultraviolet-visible (UV) spectroscopy, often integrated within hyperspectral imaging systems, have been successfully employed to differentiate normal from septicemic poultry carcasses, discriminate among different poultry myopathies [25][26][27][28], identify milk spot livers [29], and discern between healthy and pathological sheep lung tissues [30]. ...
... The notion of a testing platform that is reagent-free and requires minimal sample preparation is incredibly attractive, especially in the context of achieving a cost-effective yet efficient analysis of numerous samples or patients in routine clinical practices [3]. Data fusion, also known as data blocking, combines two or more systems biology datasets from different "omics" modalities to generate greater organism insights and can be exploited to provide an even more integrated approach [4]. Biospectroscopy approaches employ spectrochemical technologies (Table 1) primarily associated with mid-infrared (MIR) or Raman platforms [5], although near-infrared (NIR) can also be included [4]. ...
... Here the probe was pressed against tissue samples with tip window diameter 2 mm (total ø 3.25 mm) to take an average of 10 co-added scans (30 ms exposure) from the centre of each sample. Samples were chosen from biopsy plugs 4 or 8 mm in diameter, or measurements taken from intact tissue with 3.25 mm separation [57][58][59]. ...