F.-A. Weltzien

Impact of light pollution at night on male reproductive success in Japanese medaka (Oryzias latipes)

This study shows that light pollution at night increases dominant male fertilization success and sperm quality in Japanese medaka, while continuous light disrupts male hierarchy.

Integrative transcriptomics reveals ectopic lipid homeostasis mechanisms in non-endocrine cells of the teleost pituitary

The paper uses RNA-seq in medaka to show non-endocrine pituitary cells regulate lipid homeostasis during sexual maturation, linking endocrine function to lipid transport gene expression.

Sexual maturation in Atlantic salmon male parr may be triggered both in early spring and late summer under standard farming conditions

This study investigates the timing of first sexual maturation in Atlantic salmon male parr, finding that some mature in spring at one year and others in autumn at six months, with distinct physiological differences.

Characterization of hormone-producing cell types in the teleost pituitary gland using single-cell RNA-seq

The paper uses single-cell RNA-seq to characterize hormone-producing cell types in the pituitary gland of medaka fish, identifying 15 and 16 distinct cell types in females and males, respectively.

Gonadectomy and blood sampling procedures in small size teleost models

The paper describes a protocol for gonadectomy and blood sampling in small teleost fish, specifically medaka, to study sex steroid effects on physiology.

Gonadotropes in medaka grow long extensions with varicosity-like swellings, projecting towards each other and blood vessels.

This study examines the structure and function of gonadotrope extensions in medaka, finding they form networks and may communicate with blood vessels and other gonadotropes.

Gnrh1-induced responses are indirect in female medaka Fsh cells

The paper shows that Gnrh1 affects Fsh release in female medaka indirectly through Lh cells, using electrophysiological and imaging techniques.

Plasticity in medaka gonadotropes via cell proliferation and phenotypic conversion

This study shows that medaka gonadotropes can proliferate and convert phenotypes between Fsh and Lh cells, influenced by estradiol and Gnrh, and lose identity in culture.

BK channels have opposite effects on sodium versus calcium-mediated action potentials in endocrine pituitary cells.

The paper develops a computational model of medaka gonadotrope cells that fire INa-mediated action potentials and compares it to a rat model, finding that BK channels have opposite effects on AP duration depending on the underlying current mechanism.