Growth hormone treatment in cartilage-hair hypoplasia: effects on growth and the immune system

G Bocca1, C M Weemaes, I van der Burgt

  • 1Department of Pediatrics, University Medical Center St Radboud, Nijmegen, The Netherlands.

Insights

Growth hormone treatment offers no long-term benefits for children with Cartilage-hair hypoplasia (CHH), a rare genetic disorder. While temporary growth improvements occur, final height and immune function remain unaffected.

Area of Science:

  • Pediatric Endocrinology
  • Immunology
  • Genetics

Background:

  • Cartilage-hair hypoplasia (CHH) is a rare autosomal recessive disorder.
  • CHH is characterized by metaphyseal chondrodysplasia, severe growth retardation, and impaired immunity.

Purpose of the Study:

  • To investigate the effects of growth hormone (GH) treatment on growth parameters and immune system function in children with CHH.

Main Methods:

  • Study included four children diagnosed with CHH.
  • Growth parameters and serum immunoglobulins were monitored during GH treatment.

Main Results:

  • GH treatment showed the most significant effects on growth in patients with milder growth retardation.
  • These growth effects were temporary, lasting only one year, with no impact on final adult height.
  • Serum immunoglobulin levels did not change during the treatment period.

Conclusions:

  • Growth hormone treatment is not beneficial for improving final height in children with CHH.
  • GH treatment does not impact the immune system, specifically serum immunoglobulin levels, in CHH patients.

Related Concept Videos

Hormones and Bone Tissue01:17

Hormones and Bone Tissue

The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
Nature and Nurture01:10

Nature and Nurture

Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience, such as differences...
Growth of Cartilage and Bone Tissue01:27

Growth of Cartilage and Bone Tissue

Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
Cellular Adaptation II: Hypertrophy01:26

Cellular Adaptation II: Hypertrophy

Hypertrophy is the increase in the size of individual cells, resulting in the enlargement of a tissue or organ. Unlike hyperplasia, which involves an increase in cell number, hypertrophy is characterized by an increase in cell volume. This process often occurs in response to higher functional demand or hormonal stimulation, leading to the production of more structural proteins and organelles, thereby enhancing the cells' work capacity.There are two primary types of hypertrophy: physiological...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...