alejandra manjarrez

Alejandra Manjarrez

Alejandra Manjarrez is a freelance science journalist who contributes to The Scientist. She has a PhD in systems biology from ETH Zurich and a master’s in molecular biology from Utrecht University. After years studying bacteria in a lab, she now spends most of her days reading, writing, and hunting science stories, either while traveling or visiting random libraries around the world. Her work has also appeared in Hakai, The Atlantic, and Lab Times.

Articles by Alejandra Manjarrez
A germinal center inside a lymph node
Slow Vaccine Delivery May Maximize Immune Response
Alejandra Manjarrez | Sep 23, 2022
A vaccine strategy involving formulation changes, an initial escalating dose, and a longer wait for booster immunization results in more-effective antibody production against HIV in rhesus monkeys, a study finds.
Histology of mouse lungs using purple and green staining on a white background. Left: a healthy lung. Right: a fibrotic lung.<br><br>
Immunotherapy Treats Fibrosis in Mice
Alejandra Manjarrez | Sep 15, 2022
Researchers report that vaccination against proteins found on profibrotic cells reduced liver and lung fibrosis in laboratory rodents.
Adipose tissue under the microscope appearing as red blobs on a white background
Mouse Brains Appear to Eavesdrop on Their Fat
Alejandra Manjarrez | Sep 9, 2022
For the first time, a team visualizes sensory nerves projecting into adipose tissue in mice and finds these neuronal cells may counteract the local effects of the sympathetic nervous system.
A premature infant drinking from a bottle
In Search of the Best Milk Recipe for Preemies’ Gut Bacteria
Alejandra Manjarrez | Aug 22, 2022
Milk fortifiers of human origin show no evident advantage in the development of the gut microbiota of premature infants over fortifiers derived from cows, while the intake of the mother’s own milk does, two studies suggest.
Woman and baby chimpanzee face to face, as if they were talking to each other
Could a Less Complex Larynx Have Enabled Speech in Humans?
Alejandra Manjarrez | Aug 11, 2022
A paper argues that the evolutionary loss of a thin vocal membrane in the larynx may have facilitated oral communication.  
Artistic representation of a brain depicted as a clock on a background with one half in dark blue with yellow stars and one half in light blue with clouds.
Which Neurons Go to Sleep First in Humans? fMRI Can Tell
Alejandra Manjarrez | Aug 9, 2022
By linking blood flow patterns to bioelectric signals in the brains of sleeping volunteers, scientists are studying the order in which brain regions fall asleep and wake up.
A twisted and folded illustration of single-stranded RNA in front of a blue background.
Deficient RNA Editing Implicated in Inflammatory Disease 
Alejandra Manjarrez | Aug 5, 2022
Genetic variants that reduce the editing levels of double-stranded RNA are associated with autoimmune and immune-mediated conditions, a study finds.
A dolphin comes out of the water to catch a red ball.<br><br>
Dolphins May Remember Personal Experiences
Alejandra Manjarrez | Jul 29, 2022
Bottlenose dolphins can recall trivial details of a prior event to later solve a novel task, a study finds, suggesting these mammals are capable of episodic memory.
A small brown crustacean with white spots on it moving on a red branch.
Seaweed Has Its Own Matchmakers: Small Crustaceans
Alejandra Manjarrez | Jul 28, 2022
A species that transports the spermatia of red algae is the first known instance of an animal facilitating fertilization in this ancient photosynthetic lineage.
scanning electron microscope image of clawlike microscopic organisms on a smoother surface
Phyla of Tiny Filter Feeders Find a New Spot on the Tree of Life
Alejandra Manjarrez | Jul 6, 2022
A new study using fairly complete genetic datasets of two phyla of small suspension feeders (Ectoprocta and Entoprocta) reopens the debate on the phylogenetic relationships between them and other animals.