Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.4.16.2 (PCP)
 3,761 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Pneumocystis carinii (PCP) pneumonia is the most common pulmonary infection associated with the acquired immunodeficiency syndrome (AIDS). Patients at risk for PCP have defects in T lymphocyte function and include cancer and transplant patients who are on immune suppressing agents and corticosteroids. In West Virginia, PCP accounted for 53 percent of pulmonary infections in 144 cases of AIDS from 1984 to May 1990. Nationally, at least 100,000 cases of PCP are projected for the early part of this decade. Patients with PCP may present with non-specific symptoms. The chest X-ray frequently shows diffuse bilateral infiltrates but may have atypical features. Definitive diagnosis should be established using sputum staining and various bronchoscopic techniques. Trimethoprimsulfamethoxazole and IV pentamidine are the most efficacious agents for treatment, and monthly aerosolized pentamidine is recommended for prophylaxis. Further basic science and clinical research on the biology of the P. carinii and its response to treatment strategies in HIV and non-HIV related infections is urgently needed.
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PMID:Pneumocystis carinii pneumonia. 227 Jun 82

The morbidity and mortality of workers occupationally exposed to wood treating chemicals used in Hawaii for the years 1960 to 1981 were evaluated. The specific chemical exposures investigated were CCA (chromated copper-arsenate), TBTO (tributyl tin oxide) and PCP (pentachlorophenol). Results of detailed medical histories, laboratory and physiological tests, and physical examinations of 88 wood treaters were compared with those of 58 matched controls. The occupationally exposed cases had a significantly higher mean level of urinary PCP as compared to the controls (mean of 174 ppb vs. 35 ppb, micrograms/kg). There were no significant differences between the groups for the other urinary pesticide residues. The medical histories and physical examinations revealed no significant variations between the wood treaters and the comparison group. Review of all organ systems and laboratory data showed no clinically significant differences between exposed and nonexposed cohorts, although elevated hepatic enzymes in both groups merit further study. The results indicated no adverse health effects or increased incidence of mortality resulting from exposure to wood preservative chemicals in wood treaters who had worked in the industry for 0.33 to 26.3 years with a median of 6.5 years. Only 6 deaths were reported, 5 of cardiovascular disease, one of cause undetermined and none of cancer. Total number of deaths were less than the 8 anticipated for this age group.
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PMID:Effects of pentachlorophenol and other chemical preservatives on the health of wood-treating workers in Hawaii. 238 15

The geminal bisphosphonates are characterized by a PCP bond and are therefore analogs of pyrophosphate. They bind strongly to hydroxyapatite crystals and in vitro inhibit both crystal formation and dissolution. In vivo they inhibit soft tissue calcification and when given in large amounts also normal calcification. This effect is due to the inhibition of calcium phosphate crystal growth. Furthermore, the bisphosphonates are very potent inhibitors of bone resorption. The mechanism(s) of action is not yet known but is likely to be at a cellular level. The extent of the biological activity of each compound depends on the specific chemical structure, so that each individual bisphosphonate must be considered as a separate compound. The only common characteristic is the PCP group, which gives the compound its high affinity to bone. The individual effects, however, are determined by the side groups on the carbon atom. This opens interesting possibilities for the development of new compounds. No bisphosphonate analyzed so far can be degraded in vivo; all are either deposited in the skeleton, where they remain for years until the bone is destroyed, or are excreted in the urine. The high affinity for bone explains the specificity of the compounds for bone and the fact that they have relatively few nonosseous effects. Bisphosphonates are used in man to inhibit ectopic calcification, including dental tartar and ectopic ossification. Furthermore, they are used to inhibit bone resorption, especially in diseases such as Paget's disease and tumoral osteolysis. Finally, when linked to 99nTc, bisphosphonates are employed as bone scanning agents.
Recent Results Cancer Res 1989
PMID:Bisphosphonates: a new class of drugs in diseases of bone and calcium metabolism. 266 65

The clinical features of our cases demonstrated some of the already known characteristics of the variable spectrum of HIV infection. DA are the most important risk category in Italy. 10% of the ARC cases evolved into AIDS during a 12-month follow-up, on average. The most frequent OI in our AIDS cases were PCP, C. albicans esophagitis and chronic mucocutaneous ulcers. An high percentage of neurologic involvement from HIV was observed, and malignancies were encountered in AIDS (3 KS and 1 undifferentiated B lymphoma) as well as in ARC (1 Hodgkin's lymphoma). Statistically, significant worsening of the immunologic situation is evident as the disease progresses from LAS to AIDS. Activated B lymphocytes represent most of the cells of the germinal center during the hyperplastic stage of lymphadenopathy. Reversal of the T4/T8 ratio appears early during the initial stage of lymphadenopathy and is due to a decrease of CD4 and a relative increase of CD8. Also, destruction of the follicular dendritic cells is an early feature which becomes more evident as the disease advances and the lymph node evolves toward progressive involution. Activated B-lymphocyte augmentation with polyclonal Ig secretion appears to be related to T-independent B stimulation by coinfection such as CMV, EBV and HBV. The increase of cytotoxic/suppressor lymphocytes seems to be partly related to the excessive activation of B lymphocytes and partially directed to the cells infected by HIV or coated with its proteins (6,7,8,9). The destruction of follicular dendritic cells has been interpreted not only as a killer effect of the virus but also as a result of the intervention of CTL sensitized to the cells containing the virus (10,11). Their destruction may contribute to the impaired recognition of soluble antigen which is one of the main features of the immune deficiency of HIV infection (9,13,16).
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PMID:A clinical-immunological evaluation of AIDS cases and related syndromes. 348 82

Currently, average apparent consumption of alcohol for all persons older than 14 is 10 percent higher than 10 years ago, and is equivalent to about 2.75 gallons of ethanol per person per year. Approximately 10 million adult Americans (i.e., 7 percent of those 18 or older) can be considered problem drinkers. Youthful problem drinkers, aged 14 to 17, are estimated to number more than 3 million and comprise 19 percent of this age group. In addition to the social costs, the economic costs to society as a result of alcohol misuse are substantial--an estimated +49.4 billion in 1977. Ten percent of all deaths in the United States are alcohol-related. Cirrhosis, which is largely attributable to alcohol consumption, ranks among the 10 leading causes of death. Alcohol use also is associated with cancer of the liver, pancreas, esophagus, and mouth. Alcohol consumption during pregnancy is associated with a wide range of possible harmful effects to the fetus--among them decreased birth weight, spontaneous abortion, and physical and mental birth defects. Drug misuse is also an expanding problem. There are some 16 million current marijuana users. The popularity of cocaine continues to increase--over 10 million Americans have tried cocaine at least once and there are an estimated 1 to 2 million current users. Misuse of barbiturates remains a significant problem with at least 1 million persons believed to misuse these drugs and the 30,000 estimated to be addicted to them. In addition, heroin addiction is still considered by many to be the most serious drug problem in the United States. Drug misuse leads to a number of social and health problems. Excessive doses of depressants can result in both physical and psychological dependence. The toll from heroin includes premature death and severe disability, family disruption, and crime committed to maintain the habit. Misuse of hallucinogens often results in emergency room visits. A special problem is the relationship of marijuana to automobile accidents, especially when used in combination with alcohol. While these events are disconcerting, progress has been made. National surveys indicate no changes in peak quantity consumed by teenagers 12 to 17 or in regularity of their drinking, between 1974 and 1978. Alcoholism mortality rates and alcoholic psychosis rates have shown little overall increase between 1950 and 1975. And similar encouraging trends have occurred in drug misuse. Several drug abuse data sources simultaneously have begun to reflect a down turn in use rates. These early indicators must be monitored overtime before conclusions as to their true significance can be evaluated.Nonetheless, the daily use of marijuana by high school seniors dropped from a peak of 10. 7 percent in 1978 to 7.0 percent in 1981. Daily regular cigarette smoking among seniors also declined dramatically-from 28 percent to 10 percent in the same period. The use of the hallucinogenic drug PCP also dropped markedly. Cocaine,heroin and sedative use among high school seniors remained relatively stable in terms of annual and lifetime prevalence, although the use of stimulants rose markedly. Of the 16 categories of drug use analyzed in the recent High School Senior Drug Use Survey, drug use in 15 categories was either stable or was decreasing(the second year of decline since the survey began in 1975).
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PMID:Health promotion: Alcohol and drug misuse prevention. 641 12

The data suggest that: The recent outbreak of KS and PCP is a single epidemic, that of immunosuppression among homosexual men and drug abusers. The public health significance of this epidemic is probably underestimated, and clinicians should be alert to more subtle indications of immunosuppression, such as nonfatal opportunistic infections, unexplained lymphadenopathy, or other tumors. Opportunities to clarify the relationships between the environment, immunology, cancer, and infections make this outbreak scientifically important. The sudden and highly focal occurrence of these illnesses among homosexual men and drug addicts suggests a potential for their prevention if risk factors or etiologic agent(s) can be identified. The staggering morbidity and mortality associated with this outbreak dictate immediate concerted efforts to identify risk factors.
CA Cancer J Clin
PMID:The current outbreak of Kaposi's sarcoma and opportunistic infections. 681 92

Oncology of the hypertrophic prostate and histogenesis of the cancer. Histological examine of 286 hypertrophic prostates collected by suprapubic way, on histologic macrosections including the whole visceral area, with the "step section technique". N. 286 hypertrophic prostates collected through suprapubic way have been examined on histologic macrosections including the whole visceral area, with the step section technique. There have been used object holders slides measuring cm. 12 x 9 and cover objects measuring cm. 5 x 7. Colourings: hematoxylin-eosin , Goldner. Localisation of the tumours has been determined in the prostate area. The cases with the presence of tumours-microcarcinoma (MCP), with maximum axis up to 1 millimeter; small carcinoma (PCP), maximum axis from mm. 1.1 to mm. 5, and the classic carcinoma (CPcl) have been 232 (81%). CPcl appeared in 33 cases (11.53%). Histogenesis of the MCP has been ascertained (from terminal secretory micro-ducts of the prostate). Of PCP (from groups of MCP n. 56 in picture 7), and of CPcl (from PCP in progressive growth) or from grouping of MCP (in picture 14, 101 MCP of the 235 present in the area of mm2 40). CPcl has shows invading growth in ten cases; in 23 cases it consisted in infiltrating growth but limited, the border towards the prostatic tissue appears circumscribed by pseudocapsule, the cells show nucleoli of varying sizes. In seven cases it turned out to be adenocarcinoma with limited growth as said before, partly with pseudocapsules, and the cells appear seriously atypical, hypertrophic, hyperstained nuclei, thickening of the nuclear membrane, prominent nucleoli, in the absence of any invading tendency. Specific oncogenic agents are thought to transform the prostate cells into definite morphologic malignancy, while another oncogenic agent causes the invading proliferation.
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PMID:[Oncology of the hypertrophic prostate and study of the histogenesis of carcinoma. Histological analysis of 286 prostates obtained using the suprapubic route and examined using macro-sections including the entire visceral surface using the step-section technique]. 768 75

Temporal changes in the lifetime occurrence of opportunistic infections and malignancies among 1115 homosexual men diagnosed with AIDS were examined. Information from the AIDS surveillance registry, hospital pathology and microbiology logs, patient chart reviews, cancer registries, and death certificates was used to calculate the frequency of specific opportunistic infections and malignancies as lifetime (initial or subsequent) diagnoses. The most common lifetime diagnoses were Pneumocystis carinii pneumonia (PCP; 66.5%), Kaposi's sarcoma (KS; 50.7%), disseminated Mycobacterium avium complex (DMAC) infection (29.6%), and cytomegalovirus (CMV) infection (19.6%). From 1981 to 1990, there was a significant decrease in the rate of KS (P = .003) and a significant increase in the rate of DMAC infection (P = .03). PCP decreased during 1985-1990 (P = .009), while CMV infection increased from 1987 through 1990 (P = .03). Thus, KS and PCP have declined over time, while DMAC and CMV are causing substantial and increasing morbidity among AIDS patients.
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PMID:Temporal trends of opportunistic infections and malignancies in homosexual men with AIDS. 801 98

The acquired immune deficiency syndrome (AIDS) was recognized as a distinct entity in 1981. It began as a medical curiosity affecting only several dozen individuals in a restricted segment of the U.S. population. In the 12 years since its description, AIDS has become a pandemic affecting tens of millions with cases reported from all major countries. The illness is caused by a retrovirus, termed human immunodeficiency virus (HIV). It is a blood-borne disease with sexual, parenteral, and perinatal modes of transmission. Infection with the virus can be determined by a number of serologic techniques as well as viral culture. The pathophysiology of illness is incompletely understood, but is in large part related to destruction of helper, CD4 lymphocytes. This results in immune dysfunction and the development of a variety of opportunistic infections and malignancies. A great deal has been learned over the last decade, with important advances in treatment. Zidovudine (AZT) remains the most important agent in slowing progression of the disease and has resulted in prolonging survival. All organ systems can be affected by HIV, and many clinical manifestations are protein. Fever, weight loss, and diarrhea are often encountered general symptoms. The skin is frequently involved, with Kaposi's Sarcoma the most common malignancy and a variety of fungi and viruses the most frequent cause of infection. The lung is involved in the majority of patients, with Pneumocystis Carinii (PCP) and mycobacteria emerging as the most important pathogens. A variety of treatments have demonstrated efficacy for PCP. The risk of PCP is related to the decay in CD4 lymphocytes so that prophylactic treatment is recommended when CD4 counts fall below 200. Mycobacterial infection with multiresistant organisms has complicated the management of these infections and poses new risks to health care workers. Part 1 of this two-part series on AIDS discusses the pathophysiology and clinical expression, epidemiology, laboratory testing, and the general clinical manifestations of AIDS, as well as dermatologic, pulmonary, and cardiac symptoms. Part 2 will discuss the gastrointestinal, neurologic, and ocular symptoms, as well as the treatment and management of the AIDS patient.
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PMID:The acquired immune deficiency syndrome: an overview for the emergency physician, Part 1. 804 May 96

Concern has been arisen about the recently reported increasing incidence of PCP in patients with cancer and the potential transmissibility of this infection. Whether or not there is an increase in the incidence of P. carinii infections, PCP should be considered in the differential diagnosis of pulmonary infiltrates in bone marrow transplant recipients, in patients with hematologic neoplasms and in patients with primary or metastatic brain neoplasms. Intensity of immunosuppression plays a crucial role, especially long-term (> 2 months) corticosteroid treatment. PCP is usually manifested clinically during augmentation or during tapering of corticosteroid dose. Thus, if the chest radiograph of a high-risk patient shows diffuse infiltrates, bronchoscopy and bronchoalveolar lavage should be done immediately. Treatment options are the same as for the AIDS population, except that TMP-SMX is tolerated better in non-AIDS patients. The role of supportive care, including mechanical ventilation in such patients should not be underestimated. Oral therapy with dapsone-trimethoprim or with atovaquone, can be as effective as conventional therapy in mild disease, permitting treatment on an outpatient basis. PCP is often preventable and our understanding has improved about when prophylaxis should be initiated. In the future, the emergence of new technologies for diagnosis and of new agents for treatment and prophylaxis, will bring us closer to the goal of controlling this serious infection.
Cancer Treat Rev 1993 Oct
PMID:Pneumocystis carinii pneumonia in cancer patients. 822 11


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