62-785: [REDACTED] Look up CT , c.t. , or Ct. in Wiktionary, the free dictionary. CT or ct may refer to: In arts and media [ edit ] c't ( Computer Technik ), a German computer magazine Freelancer Agent Connecticut (C.T.) , a fictional character in the web series Red vs. Blue Christianity Today , an American evangelical Christian magazine Businesses and organizations [ edit ] CT Corp , an Indonesian conglomerate CT Corporation , an umbrella brand for two businesses: CT Corporation and CT Liena C/T Group , formerly Crosby Textor Group, social research and political polling company Canadian Tire ,
124-480: A glycopeptide isolated from Streptomyces verticillus , also intercalates DNA, but produces free radicals that damage DNA. This occurs when bleomycin binds to a metal ion , becomes chemically reduced and reacts with oxygen . Mitomycin is a cytotoxic antibiotic with the ability to alkylate DNA. Most chemotherapy is delivered intravenously , although a number of agents can be administered orally (e.g., melphalan , busulfan , capecitabine ). According to
186-459: A nucleobase , a sugar and a phosphate group . The nucleobases are divided into purines ( guanine and adenine ) and pyrimidines ( cytosine , thymine and uracil ). Anti-metabolites resemble either nucleobases or nucleosides (a nucleotide without the phosphate group), but have altered chemical groups . These drugs exert their effect by either blocking the enzymes required for DNA synthesis or becoming incorporated into DNA or RNA. By inhibiting
248-751: A Canadian company engaged in retailing, financial services and petroleum Calgary Transit , the public transit service in Calgary, Alberta, Canada Central Trains (National Rail abbreviation), a former train operating company in the United Kingdom Czech Television , the public television broadcaster in the Czech Republic Community Transit , the public transit service in Snohomish County, Washington, U.S. Comunión Tradicionalista ,
310-537: A cardboard (e.g. zucchini 3 ct) Corps Turd, etymologically "Cadet in Training", member of the Texas A&;M Corps of Cadets that is not in the band See also [ edit ] Champions Trophy (disambiguation) , several trophies awarded in different sports Central tendon (disambiguation) Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with
372-414: A certain dose, the effect plateaus and proportionally no more cell death occurs with increased doses. Subtypes of the anti-metabolites are the anti-folates , fluoropyrimidines, deoxynucleoside analogues and thiopurines . The anti-folates include methotrexate and pemetrexed . Methotrexate inhibits dihydrofolate reductase (DHFR), an enzyme that regenerates tetrahydrofolate from dihydrofolate . When
434-770: A former Spanish political party CT (TV channel) , a Filipino cable and satellite television network Finance [ edit ] Centime (ct), the French for "cent", used in English in several Francophone countries Stotinki (ст), the currency of Bulgaria Places [ edit ] CT postcode area , for Canterbury and surrounding areas in south-eastern England Connecticut (United States postal abbreviation) Province of Catania (vehicle registration code), Sicily, Italy Central African Republic (FIPS Pub 10-4 code and obsolete NATO diagram) Canton and Enderbury Islands (obsolete ISO 3166 country code), part of
496-444: A high index of suspicion and the use of CT scanning, nonoperative treatment for uncomplicated cases, and sometimes elective right hemicolectomy to prevent recurrence. Nausea , vomiting , anorexia , diarrhea , abdominal cramps, and constipation are common side-effects of chemotherapeutic medications that kill fast-dividing cells. Malnutrition and dehydration can result when the recipient does not eat or drink enough, or when
558-546: A large extent, chemotherapy can be thought of as a way to damage or stress cells, which may then lead to cell death if apoptosis is initiated. Many of the side effects of chemotherapy can be traced to damage to normal cells that divide rapidly and are thus sensitive to anti-mitotic drugs: cells in the bone marrow , digestive tract and hair follicles . This results in the most common side-effects of chemotherapy: myelosuppression (decreased production of blood cells, hence that also immunosuppression ), mucositis (inflammation of
620-399: A measure in the cycle of quantification/qualification of a real-time polymerase chain reaction Carat (purity) (ct), a measure of the purity of gold and platinum alloys Carat (mass) (ct), a unit of mass used for measuring gems and pearls Continuous-time signal , a varying quantity (a signal) whose domain is a continuum Center tap , a wire that is connected halfway along one of
682-417: A number of strategies in the administration of chemotherapeutic drugs used today. Chemotherapy may be given with a curative intent or it may aim to prolong life or to palliate symptoms . All chemotherapy regimens require that the recipient be capable of undergoing the treatment. Performance status is often used as a measure to determine whether a person can receive chemotherapy, or whether dose reduction
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#1732765934948744-767: A preventative and treatment effect of diarrhoea related to chemotherapy alone and with radiotherapy. However, a high index of suspicion is appropriate, since diarrhoea and bloating are also symptoms of typhlitis , a very serious and potentially life-threatening medical emergency that requires immediate treatment. Anemia can be a combined outcome caused by myelosuppressive chemotherapy, and possible cancer-related causes such as bleeding , blood cell destruction ( hemolysis ), hereditary disease, kidney dysfunction, nutritional deficiencies or anemia of chronic disease . Treatments to mitigate anemia include hormones to boost blood production ( erythropoietin ), iron supplements , and blood transfusions . Myelosuppressive therapy can cause
806-601: A recent (2016) systematic review, oral therapies present additional challenges for patients and care teams to maintain and support adherence to treatment plans. There are many intravenous methods of drug delivery, known as vascular access devices. These include the winged infusion device , peripheral venous catheter , midline catheter, peripherally inserted central catheter (PICC), central venous catheter and implantable port . The devices have different applications regarding duration of chemotherapy treatment, method of delivery and types of chemotherapeutic agent. Depending on
868-401: A state of assembly and disassembly. Vinca alkaloids and taxanes are the two main groups of anti-microtubule agents, and although both of these groups of drugs cause microtubule dysfunction, their mechanisms of action are completely opposite: Vinca alkaloids prevent the assembly of microtubules, whereas taxanes prevent their disassembly. By doing so, they can induce mitotic catastrophe in
930-656: A time zone in Canada, the United States, and Mexico Coffin Texts Conspiracy theory or theorist Counter-terrorism Cryptologic technician , a United States Navy enlisted rating or job specialty Chinese Taipei , the name used by Taiwan in some international organizations due to political pressure from the People's Republic of China ct followed by a number means the number of items contained in
992-432: A toxic protein secreted by Vibrio cholerae Threshold Cycle (C t ), see cycle of quantification/qualification COVID-19 test Computing [ edit ] Intel Ct , a SIMD multithreading programming model developed by Intel Certificate Transparency , in network security Other uses in science and technology [ edit ] CT Value , in drinking water disinfection Threshold cycle (C t ),
1054-484: Is systemic therapy for cancer: they are introduced into the blood stream (the system) and therefore can treat cancer anywhere in the body. Systemic therapy is often used with other, local therapy (treatments that work only where they are applied), such as radiation , surgery , and hyperthermia . Traditional chemotherapeutic agents are cytotoxic by means of interfering with cell division (mitosis) but cancer cells vary widely in their susceptibility to these agents. To
1116-479: Is a "life-threatening gastrointestinal complication of chemotherapy." Typhlitis is an intestinal infection which may manifest itself through symptoms including nausea , vomiting , diarrhea , a distended abdomen , fever , chills , or abdominal pain and tenderness. Typhlitis is a medical emergency . It has a very poor prognosis and is often fatal unless promptly recognized and aggressively treated. Successful treatment hinges on early diagnosis provided by
1178-1054: Is a nucleobase analogue that is metabolised in cells to form at least two active products; 5-fluourouridine monophosphate (FUMP) and 5-fluoro-2'-deoxyuridine 5'-phosphate (fdUMP). FUMP becomes incorporated into RNA and fdUMP inhibits the enzyme thymidylate synthase; both of which lead to cell death. Capecitabine is a prodrug of 5-fluorouracil that is broken down in cells to produce the active drug. The deoxynucleoside analogues include cytarabine , gemcitabine , decitabine , azacitidine , fludarabine , nelarabine , cladribine , clofarabine , and pentostatin . The thiopurines include thioguanine and mercaptopurine . Anti-microtubule agents are plant -derived chemicals that block cell division by preventing microtubule function. Microtubules are an important cellular structure composed of two proteins, α-tubulin and β-tubulin . They are hollow, rod-shaped structures that are required for cell division, among other cellular functions. Microtubules are dynamic structures, which means that they are permanently in
1240-568: Is an important factor in achieving better treatment outcomes. Similar results were found in a study involving people with colorectal cancer who have been treated with the popular FOLFOX regimen. The incidence of serious diarrhea was reduced from 12% in the BSA-dosed group of patients to 1.7% in the dose-adjusted group, and the incidence of severe mucositis was reduced from 15% to 0.8%. The FOLFOX study also demonstrated an improvement in treatment outcomes. Positive response increased from 46% in
1302-500: Is an independent prognostic predictor of survival in various cancer types. Alkylating agents are the oldest group of chemotherapeutics in use today. Originally derived from mustard gas used in World War I , there are now many types of alkylating agents in use. They are so named because of their ability to alkylate many molecules, including proteins , RNA and DNA . This ability to bind covalently to DNA via their alkyl group
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#17327659349481364-782: Is called medical oncology . The term chemotherapy now means the non-specific use of intracellular poisons to inhibit mitosis (cell division) or to induce DNA damage (so that DNA repair can augment chemotherapy). This meaning excludes the more-selective agents that block extracellular signals ( signal transduction ). Therapies with specific molecular or genetic targets, which inhibit growth-promoting signals from classic endocrine hormones (primarily estrogens for breast cancer and androgens for prostate cancer), are now called hormonal therapies . Other inhibitions of growth-signals, such as those associated with receptor tyrosine kinases , are targeted therapy . The use of drugs (whether chemotherapy, hormonal therapy, or targeted therapy)
1426-536: Is obtained from the Chinese ornamental tree Camptotheca acuminata . Drugs that target topoisomerase II can be divided into two groups. The topoisomerase II poisons cause increased levels enzymes bound to DNA. This prevents DNA replication and transcription, causes DNA strand breaks, and leads to programmed cell death ( apoptosis ). These agents include etoposide , doxorubicin , mitoxantrone and teniposide . The second group, catalytic inhibitors, are drugs that block
1488-668: Is required. Because only a fraction of the cells in a tumor die with each treatment ( fractional kill ), repeated doses must be administered to continue to reduce the size of the tumor. Current chemotherapy regimens apply drug treatment in cycles, with the frequency and duration of treatments limited by toxicity. The effectiveness of chemotherapy depends on the type of cancer and the stage. The overall effectiveness ranges from being curative for some cancers, such as some leukemias , to being ineffective, such as in some brain tumors , to being needless in others, like most non-melanoma skin cancers . Dosage of chemotherapy can be difficult: If
1550-493: Is similar to that of vinca alkaloids in that they bind to tubulin, inhibiting microtubule formation. Podophyllotoxin is used to produce two other drugs with different mechanisms of action: etoposide and teniposide . Topoisomerase inhibitors are drugs that affect the activity of two enzymes: topoisomerase I and topoisomerase II . When the DNA double-strand helix is unwound, during DNA replication or transcription , for example,
1612-426: Is that they interrupt cell division . The most important subgroup is the anthracyclines and the bleomycins ; other prominent examples include mitomycin C and actinomycin . Among the anthracyclines, doxorubicin and daunorubicin were the first, and were obtained from the bacterium Streptomyces peucetius . Derivatives of these compounds include epirubicin and idarubicin . Other clinically used drugs in
1674-455: Is the primary cause for their anti-cancer effects. DNA is made of two strands and the molecules may either bind twice to one strand of DNA (intrastrand crosslink) or may bind once to both strands (interstrand crosslink). If the cell tries to replicate crosslinked DNA during cell division , or tries to repair it, the DNA strands can break. This leads to a form of programmed cell death called apoptosis . Alkylating agents will work at any point in
1736-474: Is the type of cancer treatment that uses one or more anti-cancer drugs ( chemotherapeutic agents or alkylating agents ) in a standard regimen . Chemotherapy may be given with a curative intent (which almost always involves combinations of drugs), or it may aim only to prolong life or to reduce symptoms ( palliative chemotherapy). Chemotherapy is one of the major categories of the medical discipline specifically devoted to pharmacotherapy for cancer , which
1798-832: The PICC line . These have a lower infection risk, are much less prone to phlebitis or extravasation , and eliminate the need for repeated insertion of peripheral cannulae. Isolated limb perfusion (often used in melanoma ), or isolated infusion of chemotherapy into the liver or the lung have been used to treat some tumors. The main purpose of these approaches is to deliver a very high dose of chemotherapy to tumor sites without causing overwhelming systemic damage. These approaches can help control solitary or limited metastases, but they are by definition not systemic, and, therefore, do not treat distributed metastases or micrometastases . Topical chemotherapies, such as 5-fluorouracil , are used to treat some cases of non-melanoma skin cancer . If
1860-399: The amino , carboxyl , sulfhydryl , and phosphate groups in biologically important molecules. Non-classical alkylating agents include procarbazine and hexamethylmelamine. Anti-metabolites are a group of molecules that impede DNA and RNA synthesis. Many of them have a similar structure to the building blocks of DNA and RNA. The building blocks are nucleotides ; a molecule comprising
1922-521: The immune system , often by paralysing the bone marrow and leading to a decrease of white blood cells , red blood cells , and platelets . Anemia and thrombocytopenia may require blood transfusion . Neutropenia (a decrease of the neutrophil granulocyte count below 0.5 x 10 / litre ) can be improved with synthetic G-CSF ( granulocyte -colony-stimulating factor, e.g., filgrastim , lenograstim , efbemalenograstim alfa ). In very severe myelosuppression , which occurs in some regimens, almost all
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1984-468: The 5-FU clinical study cited above, people whose dose was adjusted to achieve a pre-determined target exposure realized an 84% improvement in treatment response rate and a six-month improvement in overall survival (OS) compared with those dosed by BSA. In the same study, investigators compared the incidence of common 5-FU-associated grade 3/4 toxicities between the dose-adjusted people and people dosed per BSA. The incidence of debilitating grades of diarrhea
2046-597: The BSA-dosed group to 70% in the dose-adjusted group. Median progression free survival (PFS) and overall survival (OS) both improved by six months in the dose adjusted group. One approach that can help clinicians individualize chemotherapy dosing is to measure the drug levels in blood plasma over time and adjust dose according to a formula or algorithm to achieve optimal exposure. With an established target exposure for optimized treatment effectiveness with minimized toxicities, dosing can be personalized to achieve target exposure and optimal results for each person. Such an algorithm
2108-667: The Phoenix Islands in the Pacific Ocean Cape Town (capital city of the Western Cape, South Africa) Ct, for "Court"; a street suffix as used in the US Science and technology [ edit ] Biology and medicine [ edit ] Haplogroup CT , Y-DNA haplogroup. CT scan or X-ray computed tomography, a medical imaging method Calcitonin (symbol CT), a hormone produced in
2170-477: The Space Shuttle from Vehicle Assembly Building to Launch Complex 39 Civil Air Transport (IATA code) Training cruiser , a U.S. Navy hull classification Cybertruck Other uses [ edit ] Ct, a typographic ligature c. t. (cum tempore, Latin for "with time"), indicates that a lecture will begin a quarter-hour after the stated time; see Academic quarter Central Time Zone ,
2232-410: The activity of topoisomerase II, and therefore prevent DNA synthesis and translation because the DNA cannot unwind properly. This group includes novobiocin , merbarone, and aclarubicin , which also have other significant mechanisms of action. The cytotoxic antibiotics are a varied group of drugs that have various mechanisms of action. The common theme that they share in their chemotherapy indication
2294-560: The adjacent unopened DNA winds tighter (supercoils), like opening the middle of a twisted rope. The stress caused by this effect is in part aided by the topoisomerase enzymes. They produce single- or double-strand breaks into DNA, reducing the tension in the DNA strand. This allows the normal unwinding of DNA to occur during replication or transcription. Inhibition of topoisomerase I or II interferes with both of these processes. Two topoisomerase I inhibitors, irinotecan and topotecan , are semi-synthetically derived from camptothecin , which
2356-405: The anthracycline group are pirarubicin , aclarubicin , and mitoxantrone . The mechanisms of anthracyclines include DNA intercalation (molecules insert between the two strands of DNA), generation of highly reactive free radicals that damage intercellular molecules and topoisomerase inhibition. Actinomycin is a complex molecule that intercalates DNA and prevents RNA synthesis . Bleomycin,
2418-638: The assembly of tubulin into microtubules. The original vinca alkaloids are natural products that include vincristine and vinblastine . Following the success of these drugs, semi-synthetic vinca alkaloids were produced: vinorelbine (used in the treatment of non-small-cell lung cancer ), vindesine , and vinflunine . These drugs are cell cycle -specific. They bind to the tubulin molecules in S-phase and prevent proper microtubule formation required for M-phase . Taxanes are natural and semi-synthetic drugs. The first drug of their class, paclitaxel ,
2480-645: The bone marrow stem cells (cells that produce white and red blood cells ) are destroyed, meaning allogenic or autologous bone marrow cell transplants are necessary. (In autologous BMTs, cells are removed from the person before the treatment, multiplied and then re-injected afterward; in allogenic BMTs, the source is a donor.) However, some people still develop diseases because of this interference with bone marrow. Although people receiving chemotherapy are encouraged to wash their hands, avoid sick people, and take other infection-reducing steps, about 85% of infections are due to naturally occurring microorganisms in
2542-475: The cancer cells. Following this, cell cycle arrest occurs, which induces programmed cell death ( apoptosis ). These drugs can also affect blood vessel growth , an essential process that tumours utilise in order to grow and metastasise. Vinca alkaloids are derived from the Madagascar periwinkle , Catharanthus roseus , formerly known as Vinca rosea . They bind to specific sites on tubulin, inhibiting
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2604-589: The cancer has central nervous system involvement, or with meningeal disease, intrathecal chemotherapy may be administered. Chemotherapeutic techniques have a range of side effects that depend on the type of medications used. The most common medications affect mainly the fast-dividing cells of the body, such as blood cells and the cells lining the mouth, stomach, and intestines. Chemotherapy-related toxicities can occur acutely after administration, within hours or days, or chronically, from weeks to years. Virtually all chemotherapeutic regimens can cause depression of
2666-933: The cell cycle and thus are known as cell cycle-independent drugs. For this reason, the effect on the cell is dose dependent; the fraction of cells that die is directly proportional to the dose of drug. The subtypes of alkylating agents are the nitrogen mustards , nitrosoureas , tetrazines , aziridines , cisplatins and derivatives, and non-classical alkylating agents. Nitrogen mustards include mechlorethamine , cyclophosphamide , melphalan , chlorambucil , ifosfamide and busulfan . Nitrosoureas include N-Nitroso-N-methylurea (MNU), carmustine (BCNU), lomustine (CCNU) and semustine (MeCCNU), fotemustine and streptozotocin . Tetrazines include dacarbazine , mitozolomide and temozolomide . Aziridines include thiotepa , mytomycin and diaziquone (AZQ). Cisplatin and derivatives include cisplatin , carboplatin and oxaliplatin . They impair cell function by forming covalent bonds with
2728-452: The dose is too low, it will be ineffective against the tumor, whereas, at excessive doses, the toxicity ( side-effects ) will be intolerable to the person receiving it. The standard method of determining chemotherapy dosage is based on calculated body surface area (BSA). The BSA is usually calculated with a mathematical formula or a nomogram , using the recipient's weight and height, rather than by direct measurement of body area. This formula
2790-622: The enzyme is inhibited by methotrexate, the cellular levels of folate coenzymes diminish. These are required for thymidylate and purine production, which are both essential for DNA synthesis and cell division. Pemetrexed is another anti-metabolite that affects purine and pyrimidine production, and therefore also inhibits DNA synthesis. It primarily inhibits the enzyme thymidylate synthase , but also has effects on DHFR, aminoimidazole carboxamide ribonucleotide formyltransferase and glycinamide ribonucleotide formyltransferase . The fluoropyrimidines include fluorouracil and capecitabine . Fluorouracil
2852-443: The enzymes involved in DNA synthesis, they prevent mitosis because the DNA cannot duplicate itself. Also, after misincorporation of the molecules into DNA, DNA damage can occur and programmed cell death ( apoptosis ) is induced. Unlike alkylating agents, anti-metabolites are cell cycle dependent. This means that they only work during a specific part of the cell cycle, in this case S-phase (the DNA synthesis phase). For this reason, at
2914-582: The formula only takes into account the individual's weight and height. Drug absorption and clearance are influenced by multiple factors, including age, sex, metabolism, disease state, organ function, drug-to-drug interactions, genetics, and obesity, which have major impacts on the actual concentration of the drug in the person's bloodstream. As a result, there is high variability in the systemic chemotherapy drug concentration in people dosed by BSA, and this variability has been demonstrated to be more than ten-fold for many drugs. In other words, if two people receive
2976-536: The immune system is suppressed to a critically low level. In Japan , the government has approved the use of some medicinal mushrooms like Trametes versicolor , to counteract depression of the immune system in people undergoing chemotherapy. Trilaciclib is an inhibitor of cyclin-dependent kinase 4/6 approved for the prevention of myelosuppression caused by chemotherapy. The drug is given before chemotherapy to protect bone marrow function. Due to immune system suppression, neutropenic enterocolitis (typhlitis)
3038-417: The lining of the digestive tract), and alopecia (hair loss). Because of the effect on immune cells (especially lymphocytes), chemotherapy drugs often find use in a host of diseases that result from harmful overactivity of the immune system against self (so-called autoimmunity ). These include rheumatoid arthritis , systemic lupus erythematosus , multiple sclerosis , vasculitis and many others. There are
3100-412: The person vomits frequently, because of gastrointestinal damage. This can result in rapid weight loss, or occasionally in weight gain, if the person eats too much in an effort to allay nausea or heartburn. Weight gain can also be caused by some steroid medications. These side-effects can frequently be reduced or eliminated with antiemetic drugs. Low-certainty evidence also suggests that probiotics may have
3162-825: The person's own gastrointestinal tract (including oral cavity ) and skin. This may manifest as systemic infections, such as sepsis , or as localized outbreaks, such as Herpes simplex , shingles , or other members of the Herpesviridea . The risk of illness and death can be reduced by taking common antibiotics such as quinolones or trimethoprim/sulfamethoxazole before any fever or sign of infection appears. Quinolones show effective prophylaxis mainly with hematological cancer. However, in general, for every five people who are immunosuppressed following chemotherapy who take an antibiotic, one fever can be prevented; for every 34 who take an antibiotic, one death can be prevented. Sometimes, chemotherapy treatments are postponed because
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#17327659349483224-522: The person, the cancer, the stage of cancer, the type of chemotherapy, and the dosage, intravenous chemotherapy may be given on either an inpatient or an outpatient basis. For continuous, frequent or prolonged intravenous chemotherapy administration, various systems may be surgically inserted into the vasculature to maintain access. Commonly used systems are the Hickman line , the Port-a-Cath , and
3286-503: The right dose to achieve optimal treatment effectiveness with minimized toxic side effects. Some people are overdosed while others are underdosed. For example, in a randomized clinical trial, investigators found 85% of metastatic colorectal cancer patients treated with 5-fluorouracil (5-FU) did not receive the optimal therapeutic dose when dosed by the BSA standard—68% were underdosed and 17% were overdosed. There has been controversy over
3348-429: The same dose of a given drug based on BSA, the concentration of that drug in the bloodstream of one person may be 10 times higher or lower compared to that of the other person. This variability is typical with many chemotherapy drugs dosed by BSA, and, as shown below, was demonstrated in a study of 14 common chemotherapy drugs. The result of this pharmacokinetic variability among people is that many people do not receive
3410-408: The thyroid gland Calibrated automated thrombogram (CT or CAT), a coagulation test Cardiothoracic surgery , the field of medicine specializing in chest surgery Chemotype (ct.), a chemically distinct entity in a plant or microorganism Cognitive therapy , a type of psychotherapy Connective tissue , a type of biological tissue Chelation therapy Chemotherapy Cholera toxin ,
3472-668: The title CT . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=CT&oldid=1252933273 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages CT">CT The requested page title contains unsupported characters : ">". Return to Main Page . Chemotherapy Chemotherapy (often abbreviated chemo , sometimes CTX and CTx )
3534-473: The use of BSA to calculate chemotherapy doses for people who are obese . Because of their higher BSA, clinicians often arbitrarily reduce the dose prescribed by the BSA formula for fear of overdosing . In many cases, this can result in sub-optimal treatment. Several clinical studies have demonstrated that when chemotherapy dosing is individualized to achieve optimal systemic drug exposure, treatment outcomes are improved and toxic side effects are reduced. In
3596-423: The windings of a transformer, inductor or a resistor Compliant Tower , a deepwater offshore oil platform Convective temperature , in atmospheric science Current transformer , a kind of transformer used in the electrical power industry Transportation [ edit ] Lexus CT , an automobile Honda CT series , a series of Honda bikes Crawler-transporter , a tracked vehicle used to transport
3658-438: Was originally derived in a 1916 study and attempted to translate medicinal doses established with laboratory animals to equivalent doses for humans. The study only included nine human subjects. When chemotherapy was introduced in the 1950s, the BSA formula was adopted as the official standard for chemotherapy dosing for lack of a better option. The validity of this method in calculating uniform doses has been questioned because
3720-570: Was originally extracted from Taxus brevifolia , the Pacific yew. Now this drug and another in this class, docetaxel , are produced semi-synthetically from a chemical found in the bark of another yew tree, Taxus baccata . Podophyllotoxin is an antineoplastic lignan obtained primarily from the American mayapple ( Podophyllum peltatum ) and Himalayan mayapple ( Sinopodophyllum hexandrum ). It has anti-microtubule activity, and its mechanism
3782-412: Was reduced from 18% in the BSA-dosed group to 4% in the dose-adjusted group and serious hematologic side effects were eliminated. Because of the reduced toxicity, dose-adjusted patients were able to be treated for longer periods of time. BSA-dosed people were treated for a total of 680 months while people in the dose-adjusted group were treated for a total of 791 months. Completing the course of treatment
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#17327659349483844-508: Was used in the clinical trials cited above and resulted in significantly improved treatment outcomes. Oncologists are already individualizing dosing of some cancer drugs based on exposure. Carboplatin and busulfan dosing rely upon results from blood tests to calculate the optimal dose for each person. Simple blood tests are also available for dose optimization of methotrexate , 5-FU, paclitaxel , and docetaxel . The serum albumin level immediately prior to chemotherapy administration
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