Research Laboratory of Ravnit Grewal

Contact Details

    • Email: ravnit(at)sanbi.ac.za

Highlights of the lab - 2019

Student supervision

  • 2 PhD students (self-funded) currently working on
    algorithm development with application to cancer – supervised by Dr Bendou
  • 1 PhD student studying Oesophageal cancer at the University of Cape Town –
    co-supervised by Dr. Bendou
  • 1 Mmed student registered at Stellenbosch University – co-supervised by Dr Grewal
  • Identified 2 new MSc students for 2020 – Dr Grewal
  •  2 postgrad Graduations: 1 Mmed student, University of Stellenbosch with thesis title “The diagnostic utility of flow cytometry on finer needle aspirate (FNA) samples at Tygerberg Hospital (TBH)” and 1 MSc in Dentistry, UWC with thesis title “Incidence of plasmablastic lymphoma in HIV positive patients at a tertiary hospital in South African(2005-2017)”.

Research Projects

As a Haemato-Pathologist my primary research interest is in HIV related lymphomas. As a consequence of this enquiry, I spearheaded a research group that studied lymphomas as it became evident that we were experiencing a surge in HIV associated complex lymphoma pathology in our laboratory. As people with HIV on Antiretroviral treatment live longer, research nationally and internationally has demonstrated a rise in certain lymphomas that occur as a consequence of infection with HIV, amongst other pathogenetic mechanisms. Understanding the pathophysiology of these lymphomas in our population specifically is of paramount importance as oncology management practices move towards targeted therapy.

Thus and in keeping abreast with current international research I aim to investigate the role of Precision/ Personalised Medicine in Pathology, specifically focusing on the detection of biomarkers for diagnosis, prognostication and management of HIV related lymphomas in South Africa and other African countries.

Our first aim is to setup an African Precision Oncology group with a mission to identify the different molecular (genomic, proteomic) profiles within cancer types, and assess the effectiveness of proposed drugs and therapies. Thus providing African pathologists with clinical decision tools to classify patient’s tumor by molecular profile, and provide the most suitable existing therapy. We have expanded the group with a bioinformatics scientist who is supervising two students on algorithms for precision oncology.

Research Collaborations

  • Established collaboration with international researchers at the University of Washington, Seattle, USA.
  • Ongoing collaborative work with the Molecular Biology and Genetics of Oesophageal Cancer at UCT.
  • Participation in a successful international collaborative work with the Cleveland Clinic Lerner College of Medicine in USA. In this research study we were able to find new biomarkers (proteins) in unexplained male infertility. The project was managed by Professor Ashok Agarwal, one of the known scientists in the field of translational research in human infertility and assisted reproduction.
  • Dr Grewal was recently invited to serve on an advisory group of Experts on In vitro diagnostics for the World Health Organisation. This will be a unique opportunity to extend the networking with regard to Precision Oncology.
  • Dr Grewal has initiated collaborations with:
    • University of Washington, Seattle, USA –coapplicants on NIH grant.
    • Basel University, Basel, Switzerland – Reciprocated visits and planning a precision oncology course to be held in Cape Town.

Publications

  • Panner Selvam, M.K., Agarwal, A., Pushparaj, P.N., Baskaran, S., and Bendou, H. Sperm Proteome Analysis and Identification of Fertility Associated Biomarkers in Unexplained Male Infertility. Genes 10, 522.
  • Cristina Bagacean, Ciprian Tomuleasa, Adrian Tempescul, Ravnit Grewal, Wesley H Brooks, Christian Berthou & Yves Renaudineau 
    Apoptotic resistance in chronic lymphocytic leukemia and therapeutic perspectives (2019): Critical Reviews in Clinical Laboratory Sciences, 0.1080/10408363.2019.1600 68Apoptotic resistance in chronic lymphocytic leukemia and therapeutic perspectives.
  • Dr Grewal is a member of the WHO Strategic Advisory Group of Experts (SAGE) on In vitro Diagnostics (2019). Essential Diagnostic List (Reviewed the Haematology related diagnostic tests to be implemented in middle to low income countries. The book has now been published). 
  • Invited speaker: Second meeting of the Strategic Advisory Group of Experts on In Vitro Diagnostics (SAGE IVD)
  • 18 – 22 March 2019, WHO HQ, Geneva: Invited as an expert reviewer for the following haematology related diagnostic tools:
  • Presentations Given:
    1. Plasma and urine protein electrophoresis and immunofixation
    2. Essential panel of antibodies for flow cytometry for leukemia
    3. Basic panel with Immunohistochemical testing (IHC) for lymphoma
    4. Numeration of lymphocyte subtypes, namely CD4 (as in HIV), CD8, CD20, CD16/56 cells
  • Grant Application: July 2019, NIH-MRC grant, RFAAI-
    19-022, for a project titled : The relationship between genetic aberrations, transcriptomic profiles as well as the microenvironment of Diffuse Large B-cell lymphoma (DLBCL) in South African HIV patients.