Good tissue practice (GTP) is one of the "

GxP GxP is a general abbreviation for the "good practice" quality guidelines and regulations. The "x" stands for the various fields, including the pharmaceutical and food industries, for example good agricultural practice, or GAP. A "c" or "C" is ...

" requirements derived from good manufacturing practice. The rule was written and is enforced by the U.S. Food and Drug Administration (FDA), specifically the Center for Biologics Evaluation and Research. The authority for the regulation comes from the

Public Health Service Act The Public Health Service Act is a United States federal law enacted in 1944. The full act is codified in Title 42 of the United States Code (The Public Health and Welfare), Chapter 6A (Public Health Service). Contents The act clearly establis ...

and all of the requirements relate to transmission of communicable disease, including bacterial or fungal contamination during processing. It is generally used to mean the requirements of section 1271 of chapter 21 of the US

Code of Federal Regulations In the law of the United States, the ''Code of Federal Regulations'' (''CFR'') is the codification of the general and permanent regulations promulgated by the executive departments and agencies of the federal government of the United States. ...

, though the rule itself specifies that the GTP is only subpart D of that section. The rules cover a broad variety of articles referred to as "HCT/Ps" for human cellular, tissue, and tissue-based products and the regulations cover more or less any cellular entity taken from a human and transplanted into another human. There are several exceptions in the rules for

organ transplants Organ transplantation is a medical procedure in which an organ is removed from one body and placed in the body of a recipient, to replace a damaged or missing organ. The donor and recipient may be at the same location, or organs may be transpo ...

, blood for transfusion, and other articles which already have established requirements. The rules are an expansion and revision of the section 1270 of the same chapter and now cover a larger group of products. The most controversial products covered in these rules include stem cells and tissue used in reproductive medicine (

assisted reproductive technology Assisted reproductive technology (ART) includes medical procedures used primarily to address infertility. This subject involves procedures such as in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI), cryopreservation of gametes o ...

sperm Sperm is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one). Animals produce motile sperm with a tail known as a flagellum, whi ...

, oocytes, and

embryos An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sper ...

. These rules only cover tissue which has not been significantly modified. Any major changes will make the product into either a

drug A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via insuffla ...

or a medical device, though some of the rules in this section still apply to human-sourced drugs and medical devices. The rules only affect products collected after May 25, 2005.

FDA Draft Guidance January 2009

In January 2009, FDA issued a new cGTP draft guidance for industry entitled "Current Good Tissue Practice (CGTP) and Additional Requirements for Manufacturers of Human Cells, Tissues and Cellular and Tissue-Based Products (HCT/Ps)".January 2009 FDA Draft Guidance for Industry
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References

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FDA Draft Guidance January 2009

References

See also