Institute of Neurobiology

Institute of Neurobiology The present site of the INB, a former nurses' dormitory for the Rodriguez U.S.

Neuroscience in Puerto Rico has its origins in the Laboratory of Neurobiology of the University of Puerto Rico that was founded in 1967 by Dr. José Del Castillo, a pioneering neurophysiologist who earned and enjoyed all his life a tremendous prestige and respect throughout the world as a first-rate scientist. His seminal work which contributed to the knowledge of the mechanism of synaptic transmis

sion, including the derivation of the quantal theory of release and the vesicular hypothesis, established a high bar for competitive research and initiated a steady traffic of influential neuroscientists through the laboratories and seminar rooms of what later became known as the Institute of Neurobiology (INB). Dr. Del Castillo moved from the National Institutes of Health to San Juan in 1959, attracted by the possibility of being able to have access to marine organisms for experimentation on a year round basis. At that time the UPR School of Medicine occupied buildings near the ocean in Old San Juan, originally built for the Columbia University School of Tropical Medicine (1926-1949). Army Hospital, became available in the mid-1960s, during the administrations of Governor´s Muñoz Marín and Sanchez Vilella, and the first of a series of NIH program project grants was submitted and funded to start a neurobiology laboratory under the direction of Dr. Del Castillo. The then Laboratory of Neurobiology was interdisciplinary from the start, bringing together physiologists, pharmacologists, anatomists and biochemists, an approach that was revolutionary at the time. The goals of the Laboratory of Neurobiology were to study the nervous and neuromuscular systems of simple animals, with emphasis on tropical marine invertebrates. Under Del Castillo´s leadership, the Institute of Neurobiology became a widely known and respected center of scholarship and research for neuroscientists in Puerto Rico, Mexico, Spain, Brazil, Venezuela, and the United States. Today the Institute of Neurobiology of the Medical Sciences Campus (MSC) provides a dedicated and centralized unit for conducting multidisciplinary basic neuroscience research using a variety of simple animal (terrestrial and aquatic invertebrates and lower vertebrates) and cellular model systems. The focus of the research is on neuroplasticity, behavior, and function at the circuit, cellular, and molecular levels. The Institute is presently composed of twelve laboratories that address some of the most challenging issues facing modern Neuroscience – ranging from synapse development, regeneration following neural tissue injury, the neural basis and modulation of behavior, regulation and function of membrane receptors and application for future drug development, the molecular basis of addiction, to the impact of habitat contaminants, temperature variations, and other environmental changes on nervous system function. The Institute also houses shared Neuroimaging (confocal, live, and electron microscopy), Molecular, and Neurogenetics Core Facilities, that are available to all its investigators and large cadre of graduate and undergraduate students, as well as visiting scientist and collaborators.

Dr. Kevin De Leon and Dr. Bruno Marie recently published an article in the prestigious journal Genetics: "Autophagy, the...
08/09/2026

Dr. Kevin De Leon and Dr. Bruno Marie recently published an article in the prestigious journal Genetics: "Autophagy, the ubiquitin proteasome system, and the MAPK pathway control the temperature dependence of synaptic growth".
Congratulations Dr. De Leon and Dr. Marie !!!

https://doi.org/10.1093/genetics/iyag226

This study shows that developmental temperature does not affect all synapses equally. Using the Drosophila larval neuromuscular junction, we find that higher temperature selectively increases bouton number at phasic 1s motor terminals, while tonic 1b terminals remain stable. We identify neuronal autophagy and the Hiw-Wnd/P38b pathway as key regulators of this temperature-dependent structural remodeling. These findings highlight how genetically similar synaptic partners can differ sharply in their sensitivity to environmental conditions.

The Institute of Neurobiology family mourns the passing of Dr. Alberto Rivera Rentas. Dr. Rivera Rentas received his Ph....
02/09/2026

The Institute of Neurobiology family mourns the passing of Dr. Alberto Rivera Rentas. Dr. Rivera Rentas received his Ph.D. from the University of Puerto Rico in 1996. Under the supervision of Dr. Gladys Escalona at the Institute, his doctoral research examined the effects of neurotoxins on ion channels. He went on to have a distinguished career at the National Institutes of Health, where he served as a Program Director at the National Institute of General Medical Sciences (NIGMS). Dr. Rivera Rentas played an instrumental role in the development and administration of several important NIH programs, including the NIH Director’s New Innovator Award Program, the NIH Blueprint for Neuroscience Research ENDURE Program, and the NIGMS Initiative for Maximizing Student Development (IMSD). Throughout his career, Alberto remained a dedicated advocate for neuroscience research and training in Puerto Rico. He made a lasting impact on the scientific community and will be deeply missed by his colleagues and friends at the Institute of Neurobiology.

We are pleased to announce that Dr. Andrew Seeds has received a Catalyzer Research Grant from the Puerto Rico Science, T...
01/09/2026

We are pleased to announce that Dr. Andrew Seeds has received a Catalyzer Research Grant from the Puerto Rico Science, Technology & Research Trust for the project "How somatotopic circuits generate spatially aimed grooming behavior". Congratulations, Dr. Seeds!

Congratulations to Dr. Cristina Velázquez-Marrero who was recently awarded a Catalyzer Grant from the Puerto Rico Scienc...
25/08/2026

Congratulations to Dr. Cristina Velázquez-Marrero who was recently awarded a Catalyzer Grant from the Puerto Rico Science, Technology & Research Trust (PRSTRT). Her project explores how a single episode of adolescent alcohol exposure affects fear extinction memory. Dr. Velázquez-Marrero is a professor and principal investigator at the Insitute of Neurobiology, and holds a joint faculty appointment at UMass Chan Medical School. Congratulations to the Velázquez-Marrero group!

The Institute of Neurobiology congratulates Professor Mark W. Miller on receiving a $596,000 NIH/NIAID Support for Resea...
19/08/2026

The Institute of Neurobiology congratulates Professor Mark W. Miller on receiving a $596,000 NIH/NIAID Support for Research Excellence (SuRE) award for the project “Targeting Snail Reproduction to Block Schistosomiasis Transmission.”

Schistosomiasis is a major neglected tropical disease. The parasites that cause it depend on freshwater Biomphalaria snails to reproduce and develop into a stage that can infect humans. Dr. Miller’s team will test whether parasite larvae stimulate three signaling systems in the snail nervous system, serotonin, histamine, and the neuropeptide sensorin, in ways that promote their own survival and proliferation. Understanding this interaction could point toward new pharmacological or genetic strategies for reducing disease transmission.

The award will also provide students at the University of Puerto Rico Medical Sciences Campus with hands-on training in neurophysiology, neuroanatomy, molecular methods, image analysis, statistics, scientific presentation, and publication, strengthening research capacity at the intersection of neurobiology, parasitology, and global health.

Congratulations to Dr. Miller and his team on this important achievement!

Congratulations to Stefanie Hampel, Alexa Negron-Morales, and Andrew Seeds for their authorship on this recent ground-br...
17/08/2026

Congratulations to Stefanie Hampel, Alexa Negron-Morales, and Andrew Seeds for their authorship on this recent ground-breaking paper in Nature: "Distributed control circuits across a brain-and-cord connectome".
https://www.nature.com/articles/s41586-026-10735-w

Congratulations to the labs of Dr. Hampel and Dr. Seeds, for their new publication in eLife - "A comprehensive mechanose...
08/06/2026

Congratulations to the labs of Dr. Hampel and Dr. Seeds, for their new publication in eLife - "A comprehensive mechanosensory connectome reveals a somatotopically organized neural circuit architecture controlling stimulus-aimed grooming of the Drosophila head"
https://elifesciences.org/articles/108044

June 3, 2026. Institute researchers welcomed students from the Puerto Rico IDeA Network of Biomedical Research Excellenc...
05/06/2026

June 3, 2026. Institute researchers welcomed students from the Puerto Rico IDeA Network of Biomedical Research Excellence (PR-INBRE) Undergraduate Summer Internship Program (USIP). The USIP program is a highly competitive 10-week research experience designed to introduce talented undergraduate students to biomedical research and prepare them for future graduate or professional training. Through the program, students are placed in active research laboratories under the mentorship of PR-INBRE investigators, where they participate in hands-on research projects while receiving training in scientific methods, data analysis, and professional development.

25/05/2026

Dirección

201 Calle Norzagaray
San Juan
00901

Teléfono

+17877214149

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