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Fetal Monkey Lung H&E LMR14.8.6.3 Gestational Day 150

Donor Tissue Kindly Provided by Dr. Gloria Pryhuber from the University of Rochester Medical Center

Pryhuber_Lab

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.8.6.3

By |2019-09-10T19:00:40+00:00April 11th, 2018|Categories: Fetal Monkey, GA 150, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.8.4.3 Gestational Day 150

Donor Tissue Kindly Provided by Dr. Gloria Pryhuber from the University of Rochester Medical Center

Pryhuber_Lab

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.8.4.3

By |2019-09-10T19:00:07+00:00April 11th, 2018|Categories: Fetal Monkey, GA 150, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.10.4.3 Gestational Day 150

Donor Tissue Kindly Provided by Dr. Gloria Pryhuber from the University of Rochester Medical Center

Pryhuber_Lab

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.10.4.3

By |2019-09-10T18:59:27+00:00April 10th, 2018|Categories: Fetal Monkey, GA 150, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.6.6.3 Gestational Day 130

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.6.6.3

By |2019-09-10T18:58:38+00:00April 10th, 2018|Categories: Fetal Monkey, GA130, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.6.4.3 Gestational Day 130

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.6.4.3

By |2019-09-10T18:58:09+00:00April 9th, 2018|Categories: Fetal Monkey, GA130, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.5.3.24 Gestational Day 130

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.5.3.24

By |2019-09-10T18:57:39+00:00April 9th, 2018|Categories: Fetal Monkey, GA130, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.4.4.3 Gestational Day 130

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.4.4.3

By |2019-09-10T18:57:07+00:00April 9th, 2018|Categories: Fetal Monkey, GA130, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.3.4.3 Gestational Day 105

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.3.4.3

By |2019-09-10T18:56:10+00:00April 9th, 2018|Categories: Fetal Monkey, GA 105, H&E|Tags: , |0 Comments
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Fetal Monkey Lung H&E LMR14.2.6.5 Gestational Day 105

  1. Paraffin sections were placed at 60oC overnight to melt paraffin.
  2. Paraffin sections were then placed in xylene (Xylenes Reagent Grade ACS Histology/Lab Grade Cat # 399000000 Pharma-AAPER) 3X for 10 minutes each.
  3. Rinsed slides in a series of 100% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  4. Rinsed slides in a series of 95% ETOH washes. 20 dips for the first wash, 3 minutes for the second wash, and 20 dips for the third wash.
  5. Rinsed slides in 70% ETOH for 3 min.
  6. Rinsed slides for 3 minutes in running dH2O.
  7. Slides were then incubated in 3% Glacial Acetic Acid (S101, Poly Scientific) for 3 minutes.
  8. Slides were then incubated in filtered Alcian Blue (S111A, Poly Scientific) for 30 minutes.
  9. Wash slides under cold running tap water for 10 minutes.
  10. Incubate for 2 minutes in Nuclear Fast Red (S248, Poly Scientific).
  11. Wash under flowing dH2O until excess Nuclear Fast Red is washed away.
  12. Incubated slides in 90% ETOH for 20 dips, repeat in different 90% ETOH.
  13. Incubated slides in 100% ETOH for 20 dips, repeat in different 100% ETOH.
  14. Washed slides in 2X in Xylene, followed by 6 more washes in xylene.
  15. Coverslip with Permount. (Permount Toulene Solution UN 1294, Cat # SP-15-500 Fisher Scientific).

Tissue Used:

LMR14.2.6.5

By |2019-09-10T18:55:35+00:00April 9th, 2018|Categories: Fetal Monkey, GA 105, H&E|Tags: , |0 Comments
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Alveolar type II cells, also known as type II pneumocytes, are specialized epithelial cells found in the alveoli of the lungs, which are the tiny air sacs responsible for gas exchange. These cells play a crucial role in maintaining the structure and function of the respiratory system.

Alveolar type II cells are located within the alveolar walls of the lungs.

Alveolar type II cells are cuboidal or squamous in shape and are smaller than alveolar type I cells, which are responsible for gas exchange. They are characterized by the presence of microvilli on their apical surface, which increases their surface area for various functions.

One of the most important functions of alveolar type II cells is the production and secretion of pulmonary surfactant. Surfactant is a complex mixture of lipids and proteins that reduces the surface tension of the alveolar fluid, preventing the collapse of alveoli during exhalation. This property is crucial for maintaining the stability of the alveoli and preventing lung collapse, particularly at the end of expiration.

Alveolar type II cells serve as progenitor cells for alveolar type I cells. They have the ability to self-renew and differentiate into type I cells, helping in the repair and regeneration of the alveolar epithelium after injury or damage. This regenerative capacity is essential for maintaining the integrity of the respiratory barrier.

Alveolar type II cells also play a role in the innate immune response of the lungs. They can produce and secrete various immune molecules, including cytokines, chemokines, and antimicrobial peptides, in response to pathogens or inflammatory stimuli. These molecules help to recruit immune cells to the site of infection and promote the clearance of pathogens from the lungs.

Alveolar type II cells are involved in the regulation of ion and fluid balance within the alveoli. They express various ion channels and transporters that regulate the movement of ions, such as sodium and chloride, across the epithelial barrier. This process is important for maintaining the osmotic balance of the alveolar fluid and preventing the accumulation of fluid in the lungs (pulmonary edema).

The surfactant produced by alveolar type II cells consists mainly of phospholipids (such as dipalmitoylphosphatidylcholine, or DPPC) and surfactant proteins (SP-A, SP-B, SP-C, and SP-D). These components work together to reduce surface tension and maintain the stability of the alveoli.

The production and secretion of surfactant by alveolar type II cells are regulated by various factors, including mechanical stretch, glucocorticoid hormones, and certain signaling molecules (such as epinephrine and thyroid hormones). These regulatory mechanisms ensure that surfactant production is matched to the demands of respiration and the maintenance of lung function.

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