Islamic University _Gaza Faculty of science Department of Biotechnology By: Mahmoud W. El-Hindi By: Mahmoud El-Hindi

Course Syllabus Course objectives:. Describe the equipments used in animal tissue culture. Understand the safety procedures need for tissue culture. Understand techniques used in tissue culture. 2By: Mahmoud El-Hindi

Course division:. 3By: Mahmoud El-Hindi 1Safety Lab and Aseptic Technique. 2 Mammalian cell culture Media preparation. 3 Primary culture " Mouse or Chicken Embryo" 4 Tissue Disaggregation in Warm and Cold Trypsin 5 Chick Embryo Organ Culture 6 Routine Cell Culture Maintenance 7 Subculture Of Monolayer Cells 8 Estimation of viability by Dye exclusion 9 Suspension Culture. 10 Animal Cell line Culture “Cryopreservation and Thawing” 11 Cancer Cell Propagation "Breast Cancer" 12 MTT toxicity Assay 13 Contamination 14 Chromosome content “karyotype”: 15 Final Exam

Lab 1: Aseptic Technique Aseptic technique is a combination of procedures designed to reduce the probability of infection. Contamination by microorganisms remains a major problem in tissue culture. Bacteria, mycoplasma, yeast, and fungal spores may be introduced via the operator, the atmosphere, work surfaces, solutions, and many other sources. 4By: Mahmoud El-Hindi

Cont. Aseptic technique Aseptic technique aims to exclude contamination by establishing a strict policy of practice and ensuring that everyone using the facility adheres to it. Contamination can be minor and confined to one or two cultures, can spread among several cultures and compromise a whole experiment, or can be widespread and wipe out your. 5By: Mahmoud El-Hindi

Cont. Mycoplasmal infection Mycoplasmal infection, invisible under regular microscopy, presents one of the major threats. Undetected, it can spread to other cultures around the laboratory. It is therefore essential to back up visual checks with a mycoplasma test, particularly if cell growth appears abnormal. 6By: Mahmoud El-Hindi

Maintaining Sterility : Correct aseptic technique Correct aseptic technique should provide a barrier between microorganisms in the environment outside the culture and the pure, uncontaminated culture within its flask or dish. All materials that come into direct contact with the culture must be sterile and its non sterile surroundings. 7By: Mahmoud El-Hindi

Cell culture contaminants two types: Chemicals 1-Chemicals: difficult to detect caused by endotoxins, metal ions or traces of disinfectants that are invisible. Contamination by microorganisms 2- Contamination by microorganisms remains a major problem in tissue culture. Bacteria, mycoplasma, yeast, and fungal spores may be introduced via the operator, the atmosphere, work surfaces, solutions, and many other sources. 8By: Mahmoud El-Hindi

Safety For best results in tissue culture, we want to work to keep microbial (bacteria, yeast and molds) contamination to a minimum. Guidelines to follow: Work in a culture hood set-aside for tissue culture purposes. Most have filtered air that blows across the surface to keep microbes from settling in the hood. Turn off the UV/antimicrobial light and turn on the hood 30 minutes prior to entering the hood. 9By: Mahmoud El-Hindi

Cont. Wash hands with soap and water before beginning the procedure and rewash if you touch anything that is not sterile or within the hood. Do not breathe directly into your cultures, bottles of media, etc. This also means to keep talking to a minimum. No singing or chewing gum. 10By: Mahmoud El-Hindi

Cont. Use only sterilized pipets, plates, flasks and bottles in the hood for procedures. Change pipettes for each manipulation. If the tip of the pipette touches something outside of the flask or bottle, replace with a new one. 11By: Mahmoud El-Hindi

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Culture Medium Sterilization 14By: Mahmoud El-Hindi

Culture flask Culture Plate 15By: Mahmoud El-Hindi

Inverted microscopy Large stage so plates and flasks can be used. Magnification; 5X, 10X, 20X, 40X 16By: Mahmoud El-Hindi

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ASEPTIC TECHNIQUE IN VERTICAL LAMINAR FLOW Clean and swab down work area, and bring bottles, pipettes, etc. Carry out preparative procedures first (preparation of media and other reagents), followed by culture work. Finally, tidy up and wipe over surface with 70% alcohol. 20By: Mahmoud El-Hindi

Cont. Sterile: _ Eagle’s 1×MEM with Hanks’ salts and HCO3, without antibiotics mL _ Pipettes, graduated, and plugged. If glass, an assortment of sizes, 1 mL, 5 mL, 10 mL, 25 mL, in a square pipette can, or, if plastic, individually wrapped and sorted by size on a rack _ Culture flasks.. 25 cm By: Mahmoud El-Hindi

Cont. Non sterile: _ Pipetting aid or bulb. _ 70% alcohol in spray bottle. _ Lint-free swabs or wipes. _ Absorbent paper tissues. _ Pipette cylinder containing water and disinfectant. _ Scissors. _ Marker pen. 22By: Mahmoud El-Hindi

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Good Luck 25By: Mahmoud El-Hindi