# Paul Greengard

> American neuroscientist (1925-2019)

**Wikidata**: [Q309979](https://www.wikidata.org/wiki/Q309979)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Paul_Greengard)  
**Source**: https://4ort.xyz/entity/paul-greengard

## Summary

Paul Greengard (1925–2019) was an American neuroscientist and biochemist who received the Nobel Prize in Physiology or Medicine in 2000 for his discoveries concerning signal transduction in the nervous system. His pioneering work revealed how neurons communicate through molecular signaling pathways, particularly focusing on the role of dopamine and other neurotransmitters, and laid the foundation for understanding numerous neurological and psychiatric disorders.

## Biography

- **Born**: December 11, 1925
- **Died**: April 13, 2019
- **Nationality**: American (United States)
- **Education**: Hamilton College (undergraduate); University of Cambridge (graduate)
- **Known for**: Discoveries concerning signal transduction in the nervous system; elucidation of dopamine signaling mechanisms; molecular basis of synaptic transmission
- **Employer(s)**: The Rockefeller University; Johns Hopkins University; Yeshiva University
- **Field(s)**: Neuroscience; Neurobiology; Molecular Biology; Biochemistry; Pharmacology

## Contributions

Paul Greengard's scientific career spanned over six decades and produced transformative discoveries in neuroscience. His most celebrated achievement was the elucidation of the molecular mechanisms by which neurotransmitters act on target cells, particularly through second messenger systems. He demonstrated that dopamine and other neurotransmitters exert their effects not through direct ion channel opening (as had been previously thought) but through activation of intracellular signaling cascades involving cyclic AMP and protein phosphorylation. This fundamental insight revolutionized the understanding of neural communication and earned him the Nobel Prize in Physiology or Medicine in 2000, shared with Arvid Carlsson and Eric Kandel. Greengard's research also made significant contributions to understanding the molecular basis of Alzheimer's disease and other neurodegenerative disorders, and he established the Pearl Meister Greengard Prize at Rockefeller University to recognize outstanding achievements in science by women.

## FAQs

**What was Paul Greengard's most significant scientific discovery?**
Greengard's most important discovery was demonstrating that neurotransmitters like dopamine signal through intracellular second messenger systems rather than direct ion channel activation, fundamentally changing understanding of how neurons communicate.

**Where did Paul Greengard conduct his research?**
Greengard held faculty positions at Johns Hopkins University, Yeshiva University, and The Rockefeller University, where he spent the majority of his career as a professor and head of the Laboratory of Molecular and Cellular Neuroscience.

**What honor did Paul Greengard receive?**
He was awarded the Nobel Prize in Physiology or Medicine in 2000 for his discoveries concerning signal transduction in the nervous system, sharing the prize with Arvid Carlsson and Eric Kandel.

**What was Greengard's educational background?**
He earned his undergraduate degree from Hamilton College and completed his graduate studies at the University of Cambridge.

**What organizations recognized Paul Greengard's work?**
He was elected to the National Academy of Sciences, American Academy of Arts and Sciences, American Philosophical Society, Royal Swedish Academy of Sciences, Norwegian Academy of Science and Letters, and Serbian Academy of Sciences and Arts.

## Why They Matter

Paul Greengard's work fundamentally transformed neuroscience by revealing the molecular mechanisms underlying neural signaling. His discovery of second messenger systems in neuronal communication provided the framework for understanding how neurotransmitters modulate brain function, which has had profound implications for developing treatments for neurological and psychiatric disorders. His research on dopamine signaling specifically has been crucial for understanding and treating Parkinson's disease, schizophrenia, and other conditions affecting the dopaminergic system. The Pearl Meister Greengard Prize, which he established at Rockefeller University in 2004, has become one of the most prestigious awards recognizing women's contributions to science, helping to address gender inequality in academic science. Without Greengard's pioneering work, modern understanding of synaptic plasticity, learning, memory, and the molecular basis of neurological disease would be fundamentally different.

## Notable For

- Nobel Prize in Physiology or Medicine (2000)
- Discovery of neuronal signal transduction mechanisms
- Elected to six national academies (NAS, AAAS, APS, Royal Swedish Academy, Norwegian Academy, Serbian Academy)
- Founder of the Pearl Meister Greengard Prize (2004)
- National Medal of Science recipient
- Pioneering research on dopamine receptor signaling
- Development of understanding of synaptic transmission molecular mechanisms

## Body

### Early Life and Education

Paul Greengard was born on December 11, 1925. He pursued his undergraduate education at Hamilton College, a private liberal arts college in Clinton, New York. Following his undergraduate studies, Greengard continued his academic journey at the University of Cambridge, one of the world's oldest and most prestigious universities, where he completed his graduate education in the United Kingdom.

### Academic Career and Positions

Greengard held faculty positions at several prestigious American universities throughout his career. He served as a professor at Johns Hopkins University, one of the leading research universities in the United States founded in 1876. He also held a position at Yeshiva University in New York City. The majority of his career was spent at The Rockefeller University in New York City, where he served as a professor and headed the Laboratory of Molecular and Cellular Neuroscience. Rockefeller University, founded in 1901 as The Rockefeller Institute for Medical Research, is renowned for its focus on biological research and graduate-level education.

### Scientific Discoveries and Research

Greengard's research centered on the molecular mechanisms of neuronal signal transduction. His groundbreaking work demonstrated that neurotransmitters do not simply open ion channels to transmit signals between neurons, as was previously believed. Instead, he showed that neurotransmitters like dopamine bind to receptors on the cell surface and activate intracellular signaling cascades involving second messengers such as cyclic AMP (cAMP). These second messengers then activate protein kinases that phosphorylate target proteins, ultimately altering neuronal function. This discovery provided a fundamental new understanding of how neural communication occurs and how synaptic plasticity—the basis of learning and memory—works at the molecular level. His research also contributed significantly to understanding the molecular mechanisms underlying Alzheimer's disease and other neurodegenerative disorders.

### Awards and Recognition

Greengard received numerous prestigious awards throughout his career. In 2000, he was awarded the Nobel Prize in Physiology or Medicine, sharing the honor with Arvid Carlsson and Eric Kandel. The Nobel Prize recognized his discoveries concerning signal transduction in the nervous system. He received the National Medal of Science, the highest scientific honor in the United States. Other notable awards include the Dickson Prize in Medicine, NAS Award in the Neurosciences, Karl Spencer Lashley Award, Bristol-Myers Squibb Award for Distinguished Achievement in Neuroscience Research, Ralph W. Gerard Prize, and the Bengt Winblad Lifetime Achievement Award in Alzheimer's Disease Research.

### Membership in Scientific Societies

Greengard was elected to membership in several of the world's most prestigious scientific organizations. He was a member of the National Academy of Sciences (founded 1863), the American Academy of Arts and Sciences (founded 1780), the American Philosophical Society (founded 1743), the Royal Swedish Academy of Sciences (founded 1739), the Norwegian Academy of Science and Letters (founded 1857), and the Serbian Academy of Sciences and Arts (founded 1841).

### Legacy and Impact

Paul Greengard's work created the foundation for much of modern neuroscience research and pharmaceutical development. His discoveries have been crucial for understanding conditions ranging from Parkinson's disease and schizophrenia to depression and addiction. In 2004, he established the Pearl Meister Greengard Prize at Rockefeller University to honor outstanding women in science, addressing the historical underrepresentation of women in scientific recognition. The prize has become one of the most prestigious awards in biomedical science. Greengard passed away on April 13, 2019, leaving behind a legacy of scientific achievement that continues to influence neuroscience research worldwide.

## References

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