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Types of Signaling Molecules

Types of Signaling Molecules

In multicellular organisms, many molecules transmit signals between cells to pass information. These signals vary in complexity and include small peptides, nucleotides, steroids, fatty acid derivatives, and dissolved gases such as nitric oxide. Some signaling molecules diffuse through the plasma membrane to act locally between neighboring cells or travel long distances. Others remain attached to the cell surface, transmitting information to other cells only when they make contact. In some...

Types of Signaling Molecules

Types of Signaling Molecules

In multicellular organisms, many molecules transmit signals between cells to pass information. These signals vary in complexity and include small peptides, nucleotides, steroids, fatty acid derivatives, and dissolved gases such as nitric oxide. Some signaling molecules diffuse through the plasma membrane to act locally between neighboring cells or travel long distances. Others remain attached to the cell surface, transmitting information to other cells only when they make contact. In some...

Chemical Signaling in the Endocrine System

Chemical Signaling in the Endocrine System

A signaling cascade is a series of events that facilitates the transmission of information within or between cells, culminating in a targeted response in the recipient cell. As chemical messengers, hormones are pivotal in initiating and modulating these intricate signaling cascades based on their solubility.
Lipid-soluble hormones, such as steroid hormones, demonstrate an intracellular action. These hormones traverse cell membranes due to their lipid nature. Once inside the target cell, they...

Signal Sequences and Sorting Receptors

Signal Sequences and Sorting Receptors

Signal sequences are short amino acid sequences that guide newly synthesized proteins to their proper location within the cell. Classical signal sequences are fifteen to sixty amino acids long and present at the N-terminus of a polypeptide chain. Each signal sequence has a conserved segment of basic residues towards their N terminus, a hydrophobic core, and a C-terminus rich in polar residues. The C-terminus also contains a signal cleavage site and features a -3 -1 sequence motif. The -3-1...

Endocrine Signaling

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.

Endocrine Signaling

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.

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Related Experiment Video

Updated: Jun 25, 2026

A Tripeptide-Stabilized Nanoemulsion of Oleic Acid

A Tripeptide-Stabilized Nanoemulsion of Oleic Acid

Published on: February 27, 2019

Bioactive peptides: signaling the future.

K Fields¹, T J Falla, K Rodan

¹Helix Biomedix Inc, Bothell, WA, USA.

Journal of Cosmetic Dermatology

|March 3, 2009

Summary

This summary is machine-generated.

Peptides and proteins modulate skin functions like cell growth and inflammation. Bioactive peptide analogs offer new pharmaceutical and cosmetic skincare ingredients, presenting both opportunities and challenges.

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Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications

Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications

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Last Updated: Jun 25, 2026

A Tripeptide-Stabilized Nanoemulsion of Oleic Acid

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Published on: February 27, 2019

Peptides from Phage Display Library Modulate Gene Expression in Mesenchymal Cells and Potentiate Osteogenesis in Unicortical Bone Defects

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Published on: December 10, 2010

Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications

Patterning Bioactive Proteins or Peptides on Hydrogel Using Photochemistry for Biological Applications

Published on: September 15, 2017

Area of Science:

Biochemistry and Molecular Biology
Dermatology
Cosmetic Science

Background:

Proteins and peptides are crucial for regulating numerous physiological processes within the body.
In skin biology, these molecules influence key functions including cell proliferation, migration, inflammation, angiogenesis, melanogenesis, and protein synthesis.

Purpose of the Study:

To explore the origin and natural roles of specific amino acid sequences (peptides and proteins).
To discuss the application of these sequences in dermatology and the skincare industry.
To outline the advantages and challenges associated with developing peptide-based technologies.

Main Methods:

Review of existing scientific literature on peptides, proteins, and their biological functions.
Analysis of the role of specific amino acid sequences in natural biological processes.
Examination of current and potential applications in dermatology and cosmetic formulations.

Main Results:

Identified specific amino acid sequences as key modulators of skin cell functions.
Highlighted the potential of therapeutic or bioactive peptide analogs as novel active ingredients.
Recognized the diverse applications emerging in the pharmaceutical and cosmetic sectors.

Conclusions:

Bioactive peptide analogs represent a significant advancement in skincare technology.
Further research is needed to fully understand and overcome the challenges in their development and application.