Hidde Lolke Ploegh (born 7 January 1953) is an immunologist at

Boston Children's Hospital Boston Children's Hospital (formerly known as Children's Hospital Boston until 2013) is the main pediatric training and research hospital of Harvard Medical School, Harvard University. It is a nationally ranked, freestanding acute care children ...

, known for his contributions in understanding antigen processing and the evasion of the

immune system The immune system is a network of biological systems that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to bacteria, as well as Tumor immunology, cancer cells, Parasitic worm, parasitic ...

virus A virus is a submicroscopic infectious agent that replicates only inside the living Cell (biology), cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Viruses are ...

es.

Career and education

Ploegh, a native of the

Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...

, received a Bachelor of Science degree in 1975, and a Master of Science degree in biology and chemistry in 1977, from the

University of Groningen The University of Groningen (abbreviated as UG; , abbreviated as RUG) is a Public university#Continental Europe, public research university of more than 30,000 students in the city of Groningen (city), Groningen, Netherlands. Founded in 1614, th ...

. Having worked for six months in Jack Strominger's lab at that time, he was able to continue his PhD studies under Strominger and received a doctorate from the

University of Leiden Leiden University (abbreviated as ''LEI''; ) is a public research university in Leiden, Netherlands. Established in 1575 by William, Prince of Orange as a Protestant institution, it holds the distinction of being the oldest university in the Neth ...

. Ploegh would then go on to hold positions at a number of institutions such as the

University of Cologne The University of Cologne () is a university in Cologne, Germany. It was established in 1388. It closed in 1798 before being re-established in 1919. It is now one of the largest universities in Germany with around 45,187 students. The Universit ...

, the Netherlands Cancer Institute,

Utrecht University Utrecht University (UU; , formerly ''Rijksuniversiteit Utrecht'') is a public university, public research university in Utrecht, Netherlands. Established , it is one of the oldest universities in the Netherlands. In 2023, it had an enrollment of ...

(2012–2015), and

Harvard Medical School Harvard Medical School (HMS) is the medical school of Harvard University and is located in the Longwood Medical and Academic Area, Longwood Medical Area in Boston, Massachusetts. Founded in 1782, HMS is the third oldest medical school in the Un ...

, before becoming a member of the Whitehead Institute. In 1986 Ploegh became a member of the

European Molecular Biology Organization The European Molecular Biology Organization (EMBO) is a professional, non-profit organization of more than 2,100 life scientists. Its goal is to promote research in life science and enable international exchange between scientists. It co-funds cour ...

. In 1997 Ploegh became a corresponding member of the

Royal Netherlands Academy of Arts and Sciences The Royal Netherlands Academy of Arts and Sciences (, KNAW) is an organization dedicated to the advancement of science and literature in the Netherlands. The academy is housed in the Trippenhuis in Amsterdam. In addition to various advisory a ...

. In 2016 he was elected to the

National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, NGO, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the ...

Research

Much of the research by Ploegh is in the fields of biochemistry and immunology. Earlier in his career, Ploegh's research focused on the ability of MHC molecules, such as MHC-II, to interact with

antigen In immunology, an antigen (Ag) is a molecule, moiety, foreign particulate matter, or an allergen, such as pollen, that can bind to a specific antibody or T-cell receptor. The presence of antigens in the body may trigger an immune response. ...

peptides inside a cell. More recently, the Ploegh lab at the Whitehead Institute has been using a technique called “sortagging” to look at the pathways through which viruses are able to avoid detection by the immune system.

Memory B cell In immunology, a memory B cell (MBC) is a type of B lymphocyte that forms part of the adaptive immune system. These cells develop within germinal centers of the secondary lymphoid organs. Memory B cells circulate in the blood stream in a quie ...

s are

lymphocyte A lymphocyte is a type of white blood cell (leukocyte) in the immune system of most vertebrates. Lymphocytes include T cells (for cell-mediated and cytotoxic adaptive immunity), B cells (for humoral, antibody-driven adaptive immunity), an ...

s known to be produced to fight off secondary infection, yet the

influenza Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These sympto ...

virus is able to avoid the immune response generated by these cells. This method was used to tag the influenza virus, so that it could be observed, and it was found that the interaction of virus antigens with the

B-cell receptor The B-cell receptor (BCR) is a transmembrane protein on the surface of a B cell. A B-cell receptor is composed of a membrane-bound immunoglobulin molecule and a signal transduction moiety. The former forms a type 1 Transmembrane protein, transmemb ...

is required for infection. Ploegh has also been involved in developing therapeutic roles for sortagging.

Erythrocytes Red blood cells (RBCs), referred to as erythrocytes (, with -''cyte'' translated as 'cell' in modern usage) in academia and medical publishing, also known as red cells, erythroid cells, and rarely haematids, are the most common type of blood cel ...

are the most abundant cell type found in the body known for lacking nuclei as a mature cell. This makes them ideal for the delivery of drugs through the body as they cannot mutate as a mature cell. Ploegh and his colleagues have been able to use sortase to cut erythrocyte surface proteins, allowing the binding of

biotin Biotin (also known as vitamin B7 or vitamin H) is one of the B vitamins. It is involved in a wide range of metabolic processes, both in humans and in other organisms, primarily related to the utilization of fats, carbohydrates, and amino acids. ...

and its circulation throughout the body. As sortagging allows the binding of a number of different proteins, it may be used for the binding of

antibodies An antibody (Ab) or immunoglobulin (Ig) is a large, Y-shaped protein belonging to the immunoglobulin superfamily which is used by the immune system to identify and neutralize antigens such as bacteria and viruses, including those that caus ...

and their delivery to target sites in the body.

References

{{DEFAULTSORT:Ploegh, Hidde 1953 births Living people Dutch immunologists Dutch biochemists Leiden University alumni University of Groningen alumni Harvard Medical School faculty Academic staff of Utrecht University Whitehead Institute faculty Members of the Royal Netherlands Academy of Arts and Sciences Fellows of the American Academy of Arts and Sciences Members of the European Molecular Biology Organization Members of the United States National Academy of Sciences People from Drenthe