Hypothalamic Pituitary Gonadal Axis
Hypothalamic Pituitary Gonadal Axis - Related Videos
01:37
Hypothalamic-Pituitary Axis
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2019
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor. What Happens During Stress In response to stress, the neurons in the hypothalamus release...
10:43
Dissection of Larval Zebrafish Gonadal Tissue
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Cited by 6 •
2017
Here, we present a protocol for isolating gonadal tissue of larval zebrafish, which will facilitate investigations of zebrafish sex differentiation and maintenance.
02:59
C. elegans Gonad Extrusion: A Rapid Dissection Technique
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2023
This video describes a method to dissect gonads from adult C. elegans hermaphrodites, resulting in tissues that are suitable for immunostaining and fluorescent imaging.
03:59
Gonad Microinjection: A Method of Compound Delivery Directly into the Germline of C. elegans
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2023
This video describes microinjection, a common method of creating transgenic C. elegans strains. In the example, we will see microinjection used to introduce a ribonucleoprotein (RNP) complex for CRISPR-bases gene editing.
08:31
Three-dimensional Alginate-bead Culture of Human Pituitary Adenoma Cells
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Cited by 5 •
2016
Three-dimensional culture in alginate beads, due to its simplicity and reproducibility, was chosen to maintain the pituitary adenoma cells. The procedures included an initial enzymatic digestion and mechanical dissociation of the tumor tissue, and the subsequent cell suspension was encapsulated in alginate beads.
FAQs
Pulsed release provides the signaling pattern through which the hypothalamus stimulates pituitary secretion of luteinizing hormone and follicle-stimulating hormone. This timing links hypothalamic activity to downstream effects in the ovaries or testes, where the gonadotropins support gamete production and sex steroid synthesis. The pulsatile pattern is therefore an important regulatory feature of reproductive hormone communication.
Estrogen, progesterone, testosterone, and inhibin feed information back to the hypothalamus and pituitary. That feedback adjusts the activity of the system rather than allowing hormone signaling to proceed independently of gonadal function. Studying these relationships helps explain how reproductive development, sexual function, and fertility remain connected to changing hormone activity in the ovaries or testes.
Both pituitary hormones transmit hypothalamic signals to the gonads, linking central hormone regulation with reproductive activity. Their action supports two major gonadal outcomes identified in the axis: production of gametes and synthesis of sex steroids. Examining these hormones together helps researchers understand how coordinated signaling contributes to reproductive function rather than treating pituitary and gonadal activity as separate processes.
The axis provides a framework for connecting hypothalamic signaling, pituitary hormone secretion, and gonadal activity during reproductive development. As these linked components regulate gamete production and sex steroid synthesis, the system helps explain how biological changes associated with puberty relate to coordinated endocrine communication. This perspective also connects developmental changes with later sexual function and fertility.
Researchers examine communication among the hypothalamus, pituitary gland, and gonads to relate hormone regulation to menstrual and testicular function. The framework accounts for signals that support gamete production, sex steroid synthesis, and feedback control. Comparing these processes across ovaries and testes allows biology and medicine to investigate reproductive function while preserving the axis's shared organizational principles.
The system offers a way to investigate reproductive disorders and infertility by tracing how altered communication among the hypothalamus, pituitary, and gonads could affect reproductive function. It also provides biological context for studying contraception, because interventions can be considered in relation to hormone signaling and feedback. These applications connect basic endocrine biology with clinically relevant reproductive questions.