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Types of Hormones

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Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells.

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Hormonal Regulation

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Related Experiment Video

Updated: Feb 12, 2026

A Hormone-responsive 3D Culture Model of the Human Mammary Gland Epithelium

A Hormone-responsive 3D Culture Model of the Human Mammary Gland Epithelium

Published on: February 7, 2016

Prolactin as a candidate sebotrop(h)ic hormone?

Ewan A Langan^1,2, Eleanor Hinde², Ralf Paus^2,3

¹Department of Dermatology, University of Luebeck, Luebeck, Germany.

Experimental Dermatology

|March 28, 2018

Summary

This summary is machine-generated.

The neurohormone prolactin (PRL) influences skin and hair growth. This study suggests PRL may regulate sebaceous glands, offering potential new treatments for skin conditions like acne.

Keywords:

acne vulgaris aging hair follicle prolactin sebaceous gland

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Last Updated: Feb 12, 2026

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Published on: February 7, 2016

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Published on: June 15, 2009

An Ex vivo Model to Study Hormone Action in the Human Breast

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Published on: January 8, 2015

Area of Science:

Dermatology
Endocrinology
Molecular Biology

Background:

Prolactin (PRL) is a pleiotropic hormone primarily known for its role in lactation.
PRL is expressed in human skin and hair follicles, regulating functions like keratin expression and hair growth.
The role of PRL in sebaceous gland (SG) biology is understudied despite clinical observations.

Purpose of the Study:

To investigate the potential role of prolactin (PRL) in sebaceous gland (SG) function.
To propose PRL as a novel therapeutic target for dermatoses affecting the SG.
To identify key research questions and experimental approaches for understanding PRL's impact on SG biology.

Main Methods:

Review of existing literature on PRL and cutaneous functions.
Analysis of preliminary evidence from human skin organ culture.
Discussion of future research directions in PRL and SG biology.

Main Results:

Preliminary data suggest PRL influences SG biology.
PRL is hypothesized to be a sebotrop(h)ic hormone.
Several open questions regarding PRL's role in SG function and pathology were identified.

Conclusions:

Prolactin (PRL) may play a significant role in regulating sebaceous gland (SG) function.
PRL represents a potential novel therapeutic target for managing acne and other SG-related dermatoses.
Further research is needed to elucidate the precise mechanisms and therapeutic applications of PRL in skin health.