Related Experiment Video
Updated: Sep 21, 2026
Combining Behavioral Endocrinology and Experimental Economics: Testosterone and Social Decision Making
Published on: March 2, 2011
[The early androgen syndrome--effect on the hormonal and immune system]
1Ustav pro péci o matku a dítĕ, Praha.
Insights
Neonatal testosterone propionate exposure in mice significantly alters immune and hormonal systems, affecting macrophage activity, blood cell counts, and antibody responses long-term.
Area of Science:
- Endocrinology
- Immunology
- Developmental Biology
Context:
- Early-life exposure to hormones can have lasting effects on physiological systems.
- Testosterone's role in immune development is complex and not fully understood.
- Investigating the impact of exogenous testosterone on neonatal development is crucial.
Purpose:
- To investigate the long-term effects of neonatal testosterone propionate administration on the immune and hormonal systems in mice.
- To analyze changes in hormone levels, immune cell function, and blood parameters following early-life testosterone exposure.
Summary:
- Neonatal administration of testosterone propionate (TP) to mice resulted in prolonged alterations in immune and hormonal parameters by one month of age.
- Elevated estradiol levels were observed in both sexes, while testosterone levels remained unchanged.
- Significant increases in peritoneal macrophage metabolic activity and phagocytosis were noted.
- Changes in bone marrow cellularity and hemoglobin levels were sex-dependent.
- Alterations in peripheral blood cell differentiation included decreased neutrophils and increased lymphocytes in males.
- Cell-mediated immunity showed enhanced graft-versus-host response.
- Humoral immunity displayed reduced IgG and elevated IgM antibody titers.
Impact:
- This study highlights the profound and persistent impact of early-life hormonal exposure on immune system development and function.
- Findings contribute to understanding the intricate relationship between hormonal signaling and immune maturation.
- Results may inform future research on endocrine disruptors and immune-related disorders.
Abstract:
Administration of 1 mg testosterone propionate to neonate mice of both sexes on the 4th day after birth causes marked and prolonged changes in some parameters of the immune and hormonal system. At the age of one month the oestradiol level in males and females is markedly elevated, but not the testosterone level. There is a marked increase in the metabolic activity of peritoneal macrophages stimulated by zymosan and at the same time also in the percentage of cells phagocytizing inert HEMA particles. There was a marked increase in the amount of haemoglobin in females and of the bone marrow cellularity (in particular in males). Obviously also changes in cell differentiation occur, the ratio of different cell types in the peripheral blood stream changes. There is a decline of neutrophil granulocytes with a divided nucleus (in particular in males, where also the number of lymphocytes rises). The cell-mediated immune response is also altered as the graft response to the host is more intense. The humoral immunity against T-dependent antigen is also affected. The titre of IgG antibodies is reduced and the titre of IgM antibodies elevated. The results are discussed, but so far it is difficult to decide whether the observed changes of the immune system are primary, i.e. directly induced by testosterone, or whether they are secondary, i.e. induced by an elevated testosterone level.
Related Concept Videos
01:22Target Cell Response to Hormones
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...
01:31Hormones of the Adrenal Glands
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and corticosterone...
01:27Adrenal Gland Disorders
Adrenal insufficiency, characterized by insufficient cortisol and aldosterone production, leads to conditions like Addison's disease. This disorder, affecting the adrenal cortex, exhibits symptoms such as skin bronzing, dehydration, low blood pressure, fatigue, and weight loss. Congenital adrenal hyperplasia, a genetic ailment causing...
01:26Testosterone: Functions and Regulation
01:27Signs of Puberty
01:27Major Hormones and Their Functions
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.