Gan SKE

Role of FcαR EC2 region in extracellular membrane localization

Published date : 05 Apr 2018

The FcαR receptor (CD89) binds to the constant region of Immunoglobulin (Ig) A to mediate mucosal immunity [1–2]. FcαR consist of five exons: two that code for the signal peptide regions S1 & S2, two for the extracellular regions EC1 and EC2, and the final exon for the transmembrane/cytoplasmic tail region [3]. Previously, we reported that the EC1 region plays an essential role for extracellular membrane localization of the receptor [4], where the absence of EC1 would prevent the variants from localizing to the cell surface, even with a full signal peptide.

type
Journal Paper
journal
Cell Cycle, 2018, doi: 10.1080/15384101.2018.1444236
Impact Factor
3.530

Effect of VH–VL Families in Pertuzumab and Trastuzumab Recombinant Production, Her2 and FcγIIA Binding

Published date : 14 Mar 2018

Many therapeutic antibodies are humanized from animal sources. In the humanization process, complementarity determining region grafting is tedious and highly prone to failure. With seven known VH families, and up to six known κ VL families, there are choices aplenty. However, the functions of these families remain largely enigmatic. To study the role of these V-region families, we made 84 recombinant combinations of the various VH and VL family whole IgG1 variants of both Trastuzumab and Pertuzumab.

type
Journal Paper
journal
Frontiers in Immunology, 12 March 2018, Vol. 9, Article: 469, doi: org/10.3389/fimmu.2018.00469
Impact Factor
6.429

The effects of Antibody Engineering CH and CL in Trastuzumab and Pertuzumab recombinant models: Impact on antibody production and antigen-binding

Published date : 15 Jan 2018

Current therapeutic antibodies such as Trastuzumab, are typically of the blood circulatory IgG1 class (Cκ/ CHγ1). Due to the binding to Her2 also present on normal cell surfaces, side effects such as cardiac failure can sometimes be associated with such targeted therapy. Using antibody isotype swapping, it may be possible to reduce systemic circulation through increased tissue localization, thereby minimising unwanted side effects. However, the effects of such modifications have yet to be fully characterized, particularly with regards to their biophysical properties in antigen binding.

type
Journal Paper
journal
Scientific Reports 8, Article no 718, 2018, doi:10.1038/s41598-017-18892-9
Impact Factor
4.259

Modeling the full length HIV-1 Gag polyprotein reveals the role of its p6 subunit in viral maturation and the effect of non-cleavage site mutations in protease drug resistance

Published date : 13 Dec 2017

HIV polyprotein Gag is increasingly found to contribute to protease inhibitor resistance. Despite its role in viral maturation and in developing drug resistance, there remain gaps in the knowledge of the role of certain Gag subunits (e.g. p6), and that of non-cleavage mutations in drug resistance. As p6 is flexible, it poses a problem for structural experiments, and is hence often omitted in experimental Gag structural studies.

type
Journal Paper
journal
Journal of Biomolecular Structure and Dynamics, 2017, Pg 1-40, doi: 10.1080/07391102.2017.1417160
Impact Factor
3.123

APD volumetric app: android app for the quantification of reagents

Published date : 03 Nov 2017

Quantifying reagents is a necessity in laboratory experiment planning but to do so with reasonable accuracy is a challenge when using unmarked containers. While there are volumetric measuring cylinders, the demand of sterility and purity in many experiments prevent their use in a feasible fashion. As a result, experienced estimation is usually relied upon, but this is fairly subjective, and may lead to large margins of error.

type
Journal Paper
journal
Scientific Phone Apps and Mobile Devices (2017) 3:7, doi: 10.1186/s41070-017-0019-8

Thyroid-SPOT for mobile devices: personalised thyroid treatment management app

Published date : 30 Aug 2017

Thyroid-SPOT is a mobile application that allows users to be able to analyse thyroid function tests laboratory reports by computing the homeostatic euthyroid set point based on regressing thyroid function data according to a patented algorithm to define the parameters that maximize the goodness-of-fit to a negative exponential model for target-centric individualized treatment.

type
Journal Paper
journal
Scientific Phone Apps and Mobile Devices 2017, 3:4 doi: 10.1186/s41070-017-0016-y

The role of Antibody Vκ Framework 3 region towards Antigen binding: Effects on recombinant production and Protein L binding

Published date : 19 Jun 2017

Antibody research has traditionally focused on heavy chains, often neglecting the important complementary role of light chains in antibody formation and secretion. In the light chain, the complementarity-determining region 3 (VL-CDR3) is specifically implicated in disease states. By modulating VL-CDR3 exposure on the scaffold through deletions in the framework region 3 (VL-FWR3), we further investigated the effects on secretion in recombinant production and antigen binding kinetics.

type
Journal Paper
journal
Scientific Reports 7, Article no: 3766 (2017), doi:10.1038/s41598-017-02756-3
Impact Factor
4.259

APD SpectBT: Arduino-based mobile vis-Spectrophotometer

Published date : 14 Mar 2017

Quantification of samples is an integral step in numerous biological and chemical experiments. Spectrophotometers are often used together with colorimetric assays that react with the compound of interest in the samples. However, spectrophotometers are often costly, bulky and immobile. To increase the convenience and ease the process of spectrophotometry, the APD SpectBT was developed using the Arduino-based platform to create a smartphone dependent mobile spectrophotometer.

type
Journal Paper
journal
Nature Methods Application Notes 2017