PGAM2-Guided Bull Selection for Improved Spermatogenesis

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Solution Overview

Problem

Conventional breeding methods for Blcattle black cattle do not effectively optimize germplasm resources to enhance the fertility of breeding bulls, which affects reproductive efficiency and beef production quality.

Innovation Solution

Utilize the PGAM2 gene to regulate proliferation, apoptosis, and glycolytic metabolism in bovine Sertoli cells, promoting spermatogenesis by overexpressing or knocking down PGAM2 in breeding cattle or their testis tissue using genetic engineering or drugs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional breeding methods are used for Blcattle black cattle, then the breeding process is simple and easy to operate, but the fertility of breeding bulls and reproductive efficiency are insufficient

Engineering Contradiction:

Improvefertility of breeding bullsVSAvoidbreeding process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the genetic parameter by introducing and overexpressing the PGAM2 gene in breeding bulls. This gene overexpression modifies the glycolytic metabolism parameters in Sertoli cells, thereby improving spermatogenesis and fertility without changing the overall breeding process complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces conventional mechanical breeding methods with a molecular biological approach. By using gene overexpression technology to modify PGAM2 expression at the molecular level, the invention achieves improved fertility without requiring complex mechanical or procedural changes in the breeding process

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If PGAM2 is overexpressed in Sertoli cells, then spermatogenesis is promoted and fertility is improved, but the metabolic energy consumption increases

Engineering Contradiction:

Improvespermatogenesis efficiencyVSAvoidmetabolic energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent changes the metabolic parameter by overexpressing PGAM2, which alters the glycolytic pathway efficiency. This increases the conversion rate of glucose to lactate and ATP in Sertoli cells, providing more energy for spermatogenesis while the cell's metabolic machinery is optimized to use this energy more effectively

Inventive Principle:

Principle #35Parameter changes

3Reliability

If PGAM2 expression is increased, then the blood-testis barrier function is enhanced, but the protein synthesis burden on Sertoli cells increases

Engineering Contradiction:

Improveblood-testis barrier functionVSAvoidprotein synthesis burden

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent changes the expression parameter of PGAM2 in a controlled manner. By optimizing the expression level rather than maximizing it, the invention achieves sufficient blood-testis barrier function while avoiding excessive protein synthesis burden. The PGAM2 protein plays a key role in maintaining tight junctions and barrier integrity with moderate expression levels

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances spermatogenesis by regulating the blood-testis barrier and communication between Sertoli and germ cells, thereby improving the selection of healthy breeding bulls, which enhances the fertility and reproductive efficiency of Blcattle black cattle.

Implementation Method 1

PGAM is a key enzyme in the glycolytic pathway, and its main function is to catalyze the conversion of 3-phosphoglycerate (3-PG) to 2-phosphoglycerate (2-PG) during glycolysis

Methodology Applied

Scientific EffectGlycolysis:

Implementation Method 2

PGAM2 is one of them. Studies in cancer cells have shown that PGAM2 plays an important role in the Warburg effect (i.e., increased glycolysis)

Methodology Applied

Scientific EffectEnzyme catalysis: Enzyme

Implementation Method 3

Studies in muscle cells have shown that deletion of PGAM2 results in loss of actin polymerization sites. Microfilaments constitute F-actin, participate in the formation of the cytoskeleton, and provide attachment sites for blood-testis barrier related proteins

Methodology Applied

Scientific EffectActin polymerization:

Implementation Method 4

Sertoli cells can prevent toxic substances from entering spermatogenic cells, and phagocytose and scavenge apoptotic spermatogenic cells and residues due to problems such as nutrient shortage

Methodology Applied

Scientific EffectPhagocytosis:

Implementation Method 5

The blood-testis barrier separates the germ cell lymphatic system from the circulatory system on the basis of the tight junctions between Sertoli cells, providing immune protection for the spermatogenesis process

Methodology Applied

Scientific EffectTight junctions:

Data Source

PatentUS20260060792A1Use of PGAM2 in breeding of blcattle black cattle

Publication Date: 2026.03.05 QINGDAO AGRI UNIV

AI summary

Provided is use of PGAM2 in the breeding of Blcattle black cattle, which belongs to the technical field of molecular biological breeding, in which individuals having a high PGAM2 content are screened as high-quality breeding bulls. In the present disclosure, it is proved by means of experiments that PGAM2 may promote the proliferation and glycolytic metabolism of Sertoli cells to produce lactic acid, an energy substrate required for spermatogenic cell development. It regulates the formation of blood-testis barrier and facilitates the communication between Sertoli cells and germ cells, thereby promoting spermatogenesis. The present disclosure provides a new direction for the breeding of Blcattle black cattle for high quality beef production.