The LPAR6 gene helps control how hair follicles shape and anchor growing hair. If this gene does not work properly, hair can be sparse, fragile, tightly curled, or slow to grow, and some people have a form of inherited hair loss called hypotrichosis. This gene plays an important role in hair structure, so variants in the LPAR6 gene are mainly linked to hair texture and hair density rather than to broader body functions.
What is a gene?
Genes are sections of DNA that hold instructions your cells use to make molecules or regulate processes in the body. Some genes carry the directions for producing proteins, the cell parts that do the work. Others mainly determine when certain processes take place, where they happen, and how strongly they operate. As a group, genes affect how the body develops and works, and they can also influence how you respond to food, stress, or medications. For a more detailed look at this subject, you can find additional information in the LearnHub.
Overview
LPAR6Gene function
What if the gene works
The LPAR6 gene helps hair follicles respond to growth signals. This supports normal hair shaft formation and influences hair texture, especially on the scalp.
Risk
What if the gene does not work
Variants in the LPAR6 gene most often affect scalp hair, causing tightly curled hair or reduced hair growth from early life. Effects can range from mild woolly hair to sparser hair, depending on how strongly the variant disrupts gene function.
Treatment
What does that mean for your treatment
No LPAR6-specific treatment or management approach is currently established for people with pathogenic variants in the LPAR6 gene. The LPAR6 pathway is being studied in hair follicle biology as a possible future treatment target, but this has not yet changed routine care.
Conditions associated with LPAR6
Gene function
What if the gene works
Signals at the surface of skin cells help hair follicles grow in an organized way. The LPAR6 gene gives cells instructions for a receptor that responds to lysophosphatidic acid (a natural fat messenger). This signaling is especially important in the hair follicle, where cells need close coordination as the hair shaft forms.
The LPAR6 gene helps certain cells detect lysophosphatidic acid, a natural fat messenger in the body. When this signal binds to the receptor on the cell surface, it starts messages inside the cell that guide everyday cell activity.
In hair follicles, LPAR6 signaling helps cells coordinate the shaping of the growing hair shaft. This is part of how the LPAR6 gene supports hair growth and normal hair structure.
Signals linked to LPAR6 help influence cell shape, movement, and the timing of cell maturation. This keeps routine follicle activity organized as new hair is being made.
What is a variant?
A genetic variant is a small change in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, or how the body responds to environmental influences. Many variants have no noticeable effect and are simply part of natural genetic variation. In some situations, though, a variant can change how a gene functions more significantly and may contribute to a genetic condition or cause one.
Genetic variants
What if the gene does not work
Variants in the LPAR6 gene can change the shape of its cell surface receptor or keep it from reaching the right place in the hair follicle, so signaling becomes weak or absent. This helps explain how LPAR6 gene variants affect hair growth and hair shaft formation. Some variants leave partial receptor activity and may cause milder hair changes, while more disruptive variants can largely switch off signaling and are often linked to earlier, more marked woolly hair with sparse growth.
How variants are linked to conditions
Pathogenic variants in the LPAR6 gene cause inherited hair conditions, most often woolly hair and hypotrichosis, which means sparse scalp hair. Many people notice tightly curled, coarse hair from early childhood, and some gradually have less hair on the scalp over time. An LPAR6 gene related hair loss diagnosis is usually confirmed when both copies of the gene carry a pathogenic variant.
A variant is not necessarily a diagnosis
Variants in genes are a routine part of human biology and are common throughout the general population. Most have no direct effect on health and simply reflect natural human diversity. For many genes, carrying a variant associated with a condition indicates a possible link rather than a definite diagnosis, especially when several genes and environmental factors also contribute. In some cases, however, one specific well characterized variant in a particular gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
For LPAR6, risk is mainly shaped by genetics, especially whether someone inherits gene changes in both copies of the gene, rather than by lifestyle or everyday exposures. There is not broadly confirmed evidence that specific habits or environmental factors increase or lower the chance of developing the hair changes linked to LPAR6.
Inheritance of LPAR6 variants
Variants in the LPAR6 gene linked to LPAR6-related hair conditions are inherited in an autosomal recessive pattern. This means a child usually inherits one altered copy from each parent, and parents who carry one variant typically do not have the condition themselves. When both parents carry an LPAR6 gene variant, each pregnancy has a 25% chance of the child inheriting both altered copies, a 50% chance of being a carrier, and a 25% chance of inheriting neither altered copy. This is the established pattern for how LPAR6 gene variants are inherited.
What does my LPAR6 result mean for my family?
For LPAR6, family implications are usually those of a recessive hair-growth condition. Parents are often healthy carriers, and brothers or sisters may also be affected or may be carriers even if their hair seems typical. Close relatives may want to learn whether the same change runs in the family, especially when there is sparse hair growth or very tightly curled, fragile hair in more than one family member.
Genetic information
Genetic testing
How you find out about variants
LPAR6 genetic testing looks for variants in the LPAR6 gene using a blood sample, cheek swab, or saliva sample. A lab reads the gene’s DNA sequence and compares it with the usual version to identify changes that may help confirm a genetic cause of sparse scalp hair or woolly hair.
When should I consider getting a genetic test?
Testing for changes in the LPAR6 gene may be worth considering if someone has very sparse scalp hair or tightly curled, fragile hair starting in infancy or childhood, especially when this runs in the family. A result can help confirm an inherited hair-growth condition and clarify the chance of it affecting other relatives.
A genetic result is only one part of your health story
A genetic finding can give useful insight, but how informative it is depends on both the condition and the kind of variant present. Factors like lifestyle, environment, age, and medical history also shape how the body functions over time. For some conditions, especially those influenced by many genes, genetic information provides context rather than certainty and makes the most sense when considered alongside other parts of care. In other situations, a genetic result can offer a clear answer. In areas like medication response, genetic results can also help put personal experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body breaks down a drug, moves it through the bloodstream, or responds to it at its target. This is one reason the same treatment may work well for one person but be less effective or cause more side effects in another. These differences are common and can influence both how strongly a medicine works and how sensitive someone is to it.
What is Pharmacogenetics?
Pharmacogenetics looks at how differences in genes can affect the way a person responds to medications. It examines gene and drug patterns to better understand why the same treatment can work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body processes it. This information can support more informed, more individualized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the LPAR6 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in predicting how people respond to medicines, so general medication questions are best discussed with your doctor. Seek medical advice if a treatment causes new or worrying symptoms, does not seem to be helping, or you are unsure how it fits with your overall health.
History
LPAR6 entered medical genetics through studies of families with unusual hair texture and sparse scalp hair. Initially understood only through visible traits, later recognized as tied to a specific gene, it was first reported under the older name P2RY5. In the late 2000s, researchers linked variants in this gene to inherited woolly hair and hypotrichosis, helping clarify why similar hair patterns appeared across generations. As medical science evolved, so did understanding of this gene, and later work showed that P2RY5 was the same gene now called LPAR6. That name change reflected a clearer view of where the gene fit within a larger family of cell signaling genes.