Catta-Preta Lab


Laboratory of Sexual and Evolutionary Cell Biology of Protists


Exploring how sex and evolution shape the biology of parasitic protozoa

Our model

 

A single-celled parasite that hides  secrets of sex, fusion, and evolution.

We use Leishmania, an early-diverging eukaryote and vector-borne parasite, as a model to uncover how sexual reproduction evolved. Understanding sex in Leishmania uncovers fundamental rules of cell fusion and evolution shared across eukaryotes — from protists to animals.

The hidden sex

In Leishmania, sex is rare, hidden, and restricted to the sand fly vector, yet it has the potential to reshape its genome. By tracing fusion and hybridization within the vector, we reveal how sex contributes to adaptation and evolutionary innovation.

Our approach

Sand fly infections

In vivo infections in sand flies allow us to trace when and where Leishmania undergoes sexual reproduction.

Genetic Modification


We engineer Leishmania to probe the pathways that control fusion, differentiation, and transmission.

Bioinformatic

We integrate genomic, transcriptomic, and single-cell datasets to uncover molecular signatures of sexual development in Leishmania.

The Big Picture

Ideas that shaped how we think about sex, evolution, and diversity

“Sex is a paradox. It is the most wasteful, inefficient, and bizarre method of reproduction imaginable, yet it dominates the living world.”
Matt Ridley
The Red Queen: Sex and the Evolution of Human Nature, 1993, chapter 1
“The unity of life is revealed in the diversity of its solutions.”
Lynn Margulis
Symbiotic Planet: A New Look at Evolution, 1998, chapter 'Gaia Is a Tough Bitch'
“The first sexual organisms were almost certainly single-celled.”
John Maynard Smith
The Evolution of Sex, 1978, chapter 'The Problem of Sex'

“By tracing fusion and hybridization in Leishmania, we reveal how ancient cellular mechanisms of sex continue to shape modern parasite diversity and evolution.”

Get in Touch

Collaborations, student projects, or seminars... Let’s connect!

Address

Av. Prof. Lineu Prestes, nº 1374 Butantã - São Paulo - SP CEP 05508-000

Email Address

ccattapreta@usp.br