METHODS: Mononuclear cells (MNC) were isolated from UCB and further enriched for CD34+ cells using immune-magnetic method followed by CFU assay. A panel of HSC markers including differentiated haematopoietic markers were used to confirm the differentiation ability of UCB-HSC by flow cytometry analysis.
RESULTS/ DISCUSSION: The HSC progenitor's colonies from the preeclampsia group were significantly lower compared to the control. This correlates with the low UCB volume, TNC and CD34+ cells count. In addition, the UCB-enriched CD34+ population were lymphoid progenitors and capable to differentiate into natural killer cells and T-lymphocytes.
CONCLUSION: These findings should be taken into consideration when selecting UCB from preeclamptic mothers for banking and predicting successful treatment related to UCB transplant.
METHODS AND RESULTS: This review discusses optimizations and techniques for antibody production through choice of discovery platforms, expression systems, cell culture mediums, and other strategies to increase expression yield. Each system has its own merits and demerits, and the strategy chosen is critical in addressing various biological aspects.
CONCLUSIONS: There is still insufficient evidence to validate the efficacy of some of these techniques, and further research is needed to consolidate these industrial production systems. There is no doubt that more strategies, systems, and pipelines will contribute to enhance biopharmaceutical production.
OBJECTIVE: To determine and compare the clinical phenotype and organ damage between male and female patients with SLE in Malaysia.
METHODOLOGY: This was a cross-sectional study involving SLE patients from Universiti Kebangsaan Malaysia Medical Centre from June 2016 until June 2017. Information on their socio-demographics and disease characteristics were obtained from the clinical records. Disease damage was assessed using the Systemic Lupus International Collaborating Clinics/American College of Rheumatology (SLICC/ACR) damage index (SDI) scores. The disease characteristics, autoantibody profiles and organ damage were compared between male and female patients, and multivariable analysis using male sex as dependent variable was then performed.
RESULTS: A total of 418 patients were recruited and a total of 59 (14.1%) patients were male. Male patients presented with lower SLE ACR criteria at initial presentation but a significantly higher number of them had renal involvement (lupus nephritis) (78.0% versus 63.8%, p = 0.04). Male patients had less musculoskeletal involvement (45.8% versus 63.0%, p = 0.02) and tended to have lesser mucocutaneous involvement. Immunologic profile revealed that a lower number of male patients had positive anti-Ro antibody (22.7% versus 44.7%, p = 0.04) and they tended to have positive lupus anticoagulant antibody (27.6% versus 14.3%, p = 0.06). Presence of organ damage (SDI score ≥ 1) was significantly higher among males (55.9% versus 39.6%, p = 0.02) with higher renal damage (25.4% versus 9.2%, p = 0.004) and cardiovascular event of ischaemic heart disease or stroke (20.3% versus 7.0%, p = 0.004). They were also inclined to develop damage much earlier as compared to female patients, 3 (interquartile range (IQR) 7.5) versus 5 (IQR 7) years, p = 0.08. The occurrence of disease damage was independently associated with male gender with odds ratio of 1.9 (95% confidence interval 1.1-3.5), p = 0.02.
CONCLUSION: Male patients with SLE have more severe disease with renal damage and cardiovascular event.
OBJECTIVES: Preclinical studies with NK cells were promising and several clinical studies are ongoing to investigate their use in antibody therapies. However, more reliable ADCC assays are required for evaluating NK cell activity to optimise therapeutic antibodies. The therapeutic potential of NK cell therapy could then be improved by harnessing ADCC.
METHODS: This review discusses recent studies on key components of NK cell-mediated ADCC, current clinical trials involving NK cells, ADCC assay developments and various techniques to improve ADCC.
RESULTS: Improvements can be made to NK-mediated ADCC through modifications of antibodies, effector cells and target antigens. Different aspects of antibodies were studied extensively, including modifying glycosylation patterns, novel production methods, combination regiments, bispecific antibodies, and conjugated antibodies. Modification of NK cells and tumour surface markers could improve ADCC of even treatment-resistant cancer cells. Additives such as cytokines and other immunomodulatory agents can further augment ADCC to supplement NK cell-based therapies.
CONCLUSION: ADCC improvements could be incorporated with current biological techniques such as adoptive transfer of NK cells and chimeric antigen receptor (CAR) NK cells, to improve the outcome of NK cell-based therapy and pave the way for future immunotherapies.