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1.
Public Health ; 228: 200-205, 2024 Mar.
Article in English | MEDLINE | ID: mdl-38412759

ABSTRACT

OBJECTIVES: State-level abortion bans in the United States have created a complex legal landscape that forces many prospective patients to travel long distances to access abortion care. The financial strain and logistical difficulties associated with travelling out of state for abortion care may present an insurmountable barrier to some individuals, especially to those with limited resources. Tracking the impact of these abortion bans on travel and housing is crucial for understanding abortion access and economic changes following the Dobbs U.S. Supreme Court decision. STUDY DESIGN: This study used occupancy data from an average of 2,349,635 (standard deviation = 111,578) U.S. Airbnb listings each month from October 1st, 2020, through April 30th, 2023, to measure the impact of abortion bans on travel for abortion care and the resulting economic effects on regional economies. METHODS: The study used a synthetic difference-in-differences design to compare monthly-level occupancy rate data from 1-bedroom entire-place Airbnb rentals within a 30-min driving distance of abortion clinics in states with and without abortion bans. RESULTS: The study found a 1.4 percentage point decrease in occupancy rates of Airbnbs around abortion clinics in states where abortion bans were in effect, demonstrating reductions in Airbnb use in states with bans. In the 6-month period post Dobbs, this decrease translates to 16,548 fewer renters and a $1.87 million loss in revenue for 1-bedroom entire-place Airbnbs within a 30-min catchment area of abortion facilities in states with abortion restrictions. CONCLUSION: This novel use of Airbnb data provides a unique perspective on measuring demand for abortion and healthcare services and demonstrates the value of this data stream as a tool for understanding economic impacts of health policies.


Subject(s)
Abortion, Induced , Housing , Pregnancy , Female , United States , Humans , Prospective Studies , Supreme Court Decisions , Travel , Abortion, Legal
2.
Transplant Proc ; 49(6): 1211-1214, 2017.
Article in English | MEDLINE | ID: mdl-28735982

ABSTRACT

Evaluating Department of Motor Vehicles (DMV) locations based on the percent of patrons who register as donors does not account for individual characteristics that may influence willingness to donate. We reviewed the driver's licenses of 2997 randomly selected patients at an urban medical system to obtain donor designation, age, gender, and DMV location and linked patient addresses with census tract data on race, ethnicity, income, and education. We then developed a Standardized Donor Designation Ratio (SDDR) (ie, the observed number of donors at each DMV divided by the expected number of donors based on patient demographic characteristics). Overall, 1355 (45%) patients were designated as donors. Donor designation was independently associated with younger age, female gender, nonblack race, and higher income. Across 18 DMVs, the proportion of patients who were donors ranged from 30% to 68% and SDDRs ranged from 0.82 to 1.17. Among the 6 facilities in the lowest tertile by SDDR, 3 were in the lowest tertile by percent donation. In conclusion, there is a great deal of variation across DMVs in rates of organ donor designation. SDDRs that adjust for DMV patron characteristics are distinct measures that may more accurately describe the performance of DMVs in promoting organ donation.


Subject(s)
Government Agencies/statistics & numerical data , Licensure/statistics & numerical data , Tissue Donors/statistics & numerical data , Adult , Automobile Driving , Female , Government Agencies/standards , Humans , Income , Male , Middle Aged , Reference Standards , Statistical Distributions
3.
Lupus ; 26(14): 1556-1561, 2017 Dec.
Article in English | MEDLINE | ID: mdl-28659044

ABSTRACT

Background/purpose To plan a quality improvement project, we need to understand the practice patterns of physicians. We undertook an online survey of systemic lupus erythematosus (SLE) patients and physicians providing care to SLE patients to determine the patterns of medical care provided to SLE patients. Materials and methods Two self-report surveys were developed. A 12-item survey for the patients and a 13-item survey for physicians enquired about longitudinal care for SLE. Surveys were administered online to physicians providing care to SLE patients, and to patients who self-identified as having SLE, through the Lupus Society of Illinois. Patient and physician data were analyzed for physician practice patterns for SLE care, using chi square tests and t tests. A P value of 0.05 or less was considered significant on two-tailed tests. Results A total of 283 patients completed the survey. Mean (SD) age and disease duration of patients were 45.9 (13.2) and 12.7 (9.7) years. Half of the participants were being seen at 3-4-month intervals. More than 70% of patients reported being tested for antinuclear antibody (ANA), and 20-30% anti-ENA antibody and Sjögren's (SSA/SSB) antibodies, respectively, at each follow-up visit. Eighty-six rheumatologists completed the surveys. Mean (SD) age was 55 (12) years and 56% were men. More than half (54%) provided care only in a private practice setting. More than 80% of physicians reported seeing their SLE patients at 3-4-month interval. Only 2% reported performing ANA tests at each visit, while 4-5% performed anti-ENA and anti-SSA/SSB antibody tests at each visit for their SLE patients. More than 75% of physicians in private practice also ordered sedimentation rate at each visit for their SLE patients. Conclusions Unnecessary laboratory investigations may be being ordered routinely for patients at every visit. These results indicate a need for physician education on indications and utility of some of the laboratory tests such as ANA.


Subject(s)
Lupus Erythematosus, Systemic/therapy , Practice Patterns, Physicians'/statistics & numerical data , Rheumatologists/statistics & numerical data , Unnecessary Procedures/statistics & numerical data , Adult , Aged , Antibodies, Antinuclear/immunology , Blood Sedimentation , Female , Health Care Surveys , Humans , Illinois , Lupus Erythematosus, Systemic/immunology , Male , Middle Aged , Surveys and Questionnaires , Time Factors
4.
Transplant Proc ; 48(6): 1911-5, 2016.
Article in English | MEDLINE | ID: mdl-27569921

ABSTRACT

INTRODUCTION: Previous studies suggest that large signature size is associated with narcissistic characteristics. By contrast, organ donation is an indicator of altruism. Because altruism and narcissism may be viewed as opposites, we sought to determine if smaller signature size is associated with willingness to be an organ donor. METHODS: Using a cross-sectional study design, we reviewed the health records of 571 randomly selected primary care patients at a large urban safety-net medical system to obtain their demographic and medical characteristics. We also examined driver's licenses that were scanned into electronic health records as part of the patient registration process. We measured signature sizes and obtained the organ donor designation from these driver's licenses. RESULTS: Overall, 256 (45%) patients were designated as donors on their driver's licenses. Signature size averaged 113.3 mm(2) but varied greatly across patients (10th percentile 49.1 mm(2), 90th percentile 226.1 mm(2)). On multivariate analysis, donor designation was positively associated with age 18-34 years, non-black race, having private insurance, and not having any comorbid conditions. However, signature size was not associated with organ donor designation. CONCLUSIONS: Signature size is not associated with verified organ donor designation. Further work is needed to understand the relationship between personality types and willingness to be an organ donor.


Subject(s)
Tissue Donors/statistics & numerical data , Tissue and Organ Procurement/methods , Adult , Cross-Sectional Studies , Female , Humans , Male , Middle Aged
5.
Transplant Proc ; 48(6): 1907-10, 2016.
Article in English | MEDLINE | ID: mdl-27569920

ABSTRACT

BACKGROUND: Little is known about the stability of decisions that people make to be organ donors. We sought to determine the rate of stability of organ donor designations on driver's licenses. METHODS: With the use of a cross-sectional study design, we reviewed the health records of 2500 randomly selected primary-care patients at a large urban safety-net medical system to obtain their demographic and medical characteristics. We also examined the two most recent unique driver's licenses, state identification cards, or learner's permits that were scanned into electronic health records as part of the patient registration process. We obtained organ donor designations from these documents for each patient. RESULTS: Of all patients, 1174 (47%) had two driver's licenses, identification cards, or permits in their electronic medical records. The two documents were issued an average of 3.5 years apart. Overall, 114 (10%) patients had differing organ donor designations on their two documents. Among the 502 patients who were designated as organ donors on the first document, 32 (6%) were not designated as organ donors on the second document. Among the 672 patients who were not designated as organ donors on the first document, 82 (12%) were designated as organ donors on the second document. There was little relationship between stability of organ donor designations and patient demographic and medical characteristics. CONCLUSIONS: About 1 of every 10 patients changed their organ donor designation, but stability was not associated with any demographic or medical factors. Further work is needed to understand why individuals change their organ donor designation.


Subject(s)
Tissue Donors/statistics & numerical data , Tissue and Organ Procurement/methods , Cross-Sectional Studies , Female , Humans , Male
6.
Am J Transplant ; 16(4): 1294-7, 2016 Apr.
Article in English | MEDLINE | ID: mdl-26603147

ABSTRACT

Previous studies on the correlates of organ donation consent have focused on self-reported willingness to donate and on self-reported medical suitability to donate. However, these may be subject to social desirability bias and inaccurate assessments of medical suitability. The authors sought to overcome these limitations by directly verifying donor designation on driver's licenses and by abstracting comorbid conditions from electronic health records. Using a cross-sectional study design, they reviewed the health records of 2070 randomly selected primary care patients at a large urban safety-net medical system to obtain demographic and medical characteristics. They also examined driver's licenses that were scanned into electronic health records as part of the patient registration process for donor designation. Overall, 943 (46%) patients were designated as a donor on their driver's license. On multivariate analysis, donor designation was positively associated with age 35-54 years, female sex, nonblack race, speaking English or Spanish, being employed, having private insurance, having an income >$45 000, and having fewer comorbid conditions. These demographic and medical characteristics resulted in patient subgroups with donor designation rates ranging from 21% to 75%. In conclusion, patient characteristics are strongly related to verified donor designation. Further work should tailor organ donation efforts to specific subgroups.


Subject(s)
Demography , Medical Records , Organ Transplantation/standards , Tissue Donors , Tissue and Organ Procurement/standards , Adult , Cross-Sectional Studies , Employment , Female , Follow-Up Studies , Humans , Income , Male , Middle Aged
7.
Fish Physiol Biochem ; 41(1): 31-40, 2015 Feb.
Article in English | MEDLINE | ID: mdl-25366672

ABSTRACT

In the present study, potential interaction between natural estrogens i.e., estrone (E(1)), estradiol (E(2)) and estriol (E(3)) with human estrogen receptor (hER) was seen by in silico study. Molecular docking studies were carried out using Glide and ligand docking program. The binding affinity, assessed by Glide score, indicates stronger interaction of E(3) with hER followed by E(2) and E(1). Real-time PCR analysis of vga and vgb expressions, in the liver of different groups of Channa punctatus injected with the three natural estrogens, supported the docking analysis and indicated E(3) to be the most potent estrogen in inducing vga and vgb expressions followed by E(2) and E(1). This study lays the groundwork for studying interactions of various estrogenic substances with different estrogen receptors and to assess estrogenicity of various chemicals which are being released into the environment by employing molecular docking technique.


Subject(s)
Estrogen Receptor alpha/chemistry , Estrogen Receptor alpha/metabolism , Estrogens/metabolism , Models, Molecular , Perciformes/metabolism , Vitellogenins/metabolism , Amino Acid Sequence , Analysis of Variance , Animals , Computer Simulation , DNA Primers/genetics , Estrogen Receptor alpha/genetics , Gene Expression Profiling , Liver/metabolism , Male , Molecular Sequence Data , Molecular Structure , Protein Binding , Real-Time Polymerase Chain Reaction/veterinary , Software
8.
Fish Physiol Biochem ; 41(1): 107-17, 2015 Feb.
Article in English | MEDLINE | ID: mdl-25389068

ABSTRACT

A novel incomplete vitellogenin (VgC) was purified from the plasma of estradiol-treated male murrel, Channa punctatus, by gel filtration chromatography. The native mass of VgC protein was 180 kDa, and it resolved as a single peptide of 100 kDa on SDS-PAGE. The peptide on subjecting to matrix-assisted laser desorption/ionization-time of flight produced a peptide mass fingerprint. On tandem mass spectrometry, some of these peptides showed mass to charge (m/z) ratio and amino acid sequence similarity with VgC peptides of other teleosts. Phylogenetic analysis revealed a similarity of murrel VgC with fish species of the order Perciformes. Semi-quantitative RT-PCR assay was developed to study expression of vgc gene at variable levels of estradiol exposure. Presence of VgC in males indicates that fish has been exposed to estrogens; hence, it can be used as a biomarker for estrogenic exposure.


Subject(s)
Biomarkers/blood , Perciformes/genetics , Phylogeny , Vitellogenins/genetics , Amino Acid Sequence , Animals , Chromatography, Gel/veterinary , Electrophoresis, Polyacrylamide Gel/veterinary , Estradiol/pharmacology , Likelihood Functions , Male , Models, Genetic , Molecular Sequence Data , Real-Time Polymerase Chain Reaction , Sequence Homology , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization , Tandem Mass Spectrometry , Vitellogenins/blood , Vitellogenins/isolation & purification
9.
Indian J Exp Biol ; 51(6): 411-20, 2013 Jun.
Article in English | MEDLINE | ID: mdl-23926689

ABSTRACT

In oviparous organisms, yolk accumulation in the oocytes is critical and indispensable for the development of the newly hatched young ones. In fish and many other oviparous vertebrates, the major constituents of the egg-yolk are synthesized as a precursor in the liver. The precursor is transported to the oocyte for uptake and cleaved into major yolk proteins lipovitellin, phosvitin and beta'-components. The eggs of Channa punctatus are pelagic, have large oil globule and exceptionally high lipid content. Lipovitellin was isolated by single step gel filtration chromatography on Sepharose 6B. Purified native lipovitellin showed immunological reactivity with vitellogenin antiserum. Phosvitin isolated by phenol extraction method could not be visualized with routine protein staining methods, whereas incorporation of trivalent ions in the coomassie brilliant blue stained phosvitin. It was characterized by in vivo labeling of egg-yolk proteins with 32P. The molecular mass of murrel phosvitin was less than 14,000 kDa.


Subject(s)
Egg Proteins/isolation & purification , Egg Proteins/metabolism , Egg Yolk/metabolism , Oocytes/metabolism , Phosvitin/metabolism , Vitellogenins/metabolism , Animals , Chromatography, Gel , Fishes , Fresh Water , Molecular Weight , Oocytes/cytology
10.
Gen Comp Endocrinol ; 189: 119-26, 2013 Aug 01.
Article in English | MEDLINE | ID: mdl-23702030

ABSTRACT

The present study was undertaken to characterize different vitellogenins in Channa punctatus. Protein purification by gel chromatography followed by fast protein liquid chromatography (FPLC) revealed existence of two different Vg forms. Liquid chromatography tandem mass spectrophotometry (LC-MS/MS) suggested the existence of Vga and Vgb. Cloning of partial sequences of vga and vgb mRNA and phylogenetic analysis substantiated the existence of two vitellogenins. Real time PCR for vga and vgb genes from liver of estradiol-17ß (E2) treated fish reveals difference in expression levels of transcripts of these two genes. vgb is expressed at lower dose of estradiol suggesting a higher sensitivity to estradiol. The present study thus proposes different regulatory control for the expression of these two genes and vgb as a superior biomarker than vga to assess exposure of C. punctatus to environmental estrogens.


Subject(s)
Perciformes/metabolism , Vitellogenins/isolation & purification , Vitellogenins/metabolism , Animals , Fresh Water , Polymerase Chain Reaction , Tandem Mass Spectrometry , Vitellogenins/genetics
11.
Fish Physiol Biochem ; 39(1): 39-46, 2013 Feb.
Article in English | MEDLINE | ID: mdl-22535407

ABSTRACT

Three types of vitellogenins (Vgs) namely vitellogenin A (VgA), vitellogenin B (VgB) and vitellogenin C (VgC) have been identified in fishes. The existence of VgA and VgB is reported in the Indian freshwater murrel Channa punctatus. Gene-specific primers were designed using available nucleotide sequences in National Centre for Biotechnology Information (NCBI), for amplification of VgA and VgB cDNA. Differential processing of Vgs is evident in many fishes. Adult male murrel expressed both the VgA and VgB genes when estradiol-17ß (E(2)) is injected in vivo and Vg levels in blood quantified by Enzyme linked immunosorbent assay (ELISA) showed a dose-related response in such treatments. Cultured hepatocytes on treatment with E(2), however, expressed only VgB as detected by RT-PCR, suggesting different regulatory mechanism for the VgA and VgB genes.


Subject(s)
Estradiol/pharmacology , Gene Expression Regulation/drug effects , Perciformes/genetics , Vitellogenins/metabolism , Animals , DNA Primers/genetics , Dose-Response Relationship, Drug , Electrophoresis, Agar Gel , Enzyme-Linked Immunosorbent Assay/veterinary , Hepatocytes/drug effects , Male , Nucleic Acid Amplification Techniques/veterinary , Reverse Transcriptase Polymerase Chain Reaction/veterinary , Species Specificity , Vitellogenins/genetics
12.
Andrologia ; 44 Suppl 1: 312-22, 2012 May.
Article in English | MEDLINE | ID: mdl-21729141

ABSTRACT

Regulation of androgen receptor (AR) and oestrogen receptor α (ERα) expression has direct bearing on the physiology of male reproductive organs. With the help of three independent tools of immunohistochemistry, western blotting and RT-PCR, AR and ER α receptor expression was examined in the testis, epididymis, prostate, seminal vesicle and pituitary of adult rats following testosterone enanthate (TE, 3 mg/100 µl of olive oil/rat per week) intervention for 15 and 30 days. TE administration reduced AR immunoexpression which coincided well with the decline in the receptor protein and transcript levels. In contrast, ERα was found overexpressed in all the organs. While weights of testis and epididymis decreased significantly, those of prostate, seminal vesicle and pituitary demonstrated an upward trend. Spermatogenesis was adversely affected with decline in number of germ cells per tubule and increased prevalence of germ cell apoptosis. Increase in serum and decrease in intra-testicular levels of testosterone were found significant (P < 0.001) in both 15 and 30 days treatment groups. Serum follicle stimulating hormone declined significantly (P < 0.001) at the end of 30 days treatment. Taken together, the above findings indicate that the testosterone intervention differentially modulates, AR ERα expression, which is associated with hypospermatogenesis and increased germ cell apoptosis.


Subject(s)
Estrogen Receptor alpha/metabolism , Genitalia, Male/metabolism , Pituitary Gland/metabolism , Receptors, Androgen/metabolism , Testosterone/administration & dosage , Animals , Apoptosis , Base Sequence , Blotting, Western , DNA Primers , Immunohistochemistry , Male , Polymerase Chain Reaction , Radioimmunoassay , Rats , Rats, Sprague-Dawley , Spermatogenesis , Testosterone/blood , Testosterone/pharmacology
13.
Postgrad Med J ; 86(1022): 729-33, 2010 Dec.
Article in English | MEDLINE | ID: mdl-21106808

ABSTRACT

AIM: The goal of this project was to improve unit-based safety culture through implementation of a multidisciplinary (pharmacy, nursing, medicine) teamwork and communication intervention. METHOD: The Agency for Healthcare Research and Quality Hospital Survey on Patient Safety Culture was used to determine the impact of the training with a before-after design. RESULTS: Surveys were returned from 454 healthcare staff before the training and 368 staff 1 year later. Five of eleven safety culture subscales showed significant improvement. Nurses perceived a stronger safety culture than physicians or pharmacists. CONCLUSION: While it is difficult to isolate the effects of the team training intervention from other events occurring during the year between training and postevaluation, overall the intervention seems to have improved the safety culture on these medical units.

14.
Qual Saf Health Care ; 19(4): 346-50, 2010 Aug.
Article in English | MEDLINE | ID: mdl-20693223

ABSTRACT

AIM: The goal of this project was to improve unit-based safety culture through implementation of a multidisciplinary (pharmacy, nursing, medicine) teamwork and communication intervention. METHOD: The Agency for Healthcare Research and Quality Hospital Survey on Patient Safety Culture was used to determine the impact of the training with a before-after design. RESULTS: Surveys were returned from 454 healthcare staff before the training and 368 staff 1 year later. Five of eleven safety culture subscales showed significant improvement. Nurses perceived a stronger safety culture than physicians or pharmacists. CONCLUSION: While it is difficult to isolate the effects of the team training intervention from other events occurring during the year between training and postevaluation, overall the intervention seems to have improved the safety culture on these medical units.


Subject(s)
Communication , Hospital Units , Inservice Training/methods , Organizational Culture , Patient Care Team , Quality Assurance, Health Care/methods , Safety Management/standards , Adult , Attitude of Health Personnel , Health Care Surveys , Humans , Medical Staff, Hospital/psychology , Medical Staff, Hospital/statistics & numerical data , Patient Safety , Pilot Projects , United States
15.
Andrologia ; 42(3): 193-205, 2010 Jun.
Article in English | MEDLINE | ID: mdl-20500749

ABSTRACT

Following chronic (15 or 30 days) treatment with oestradiol 3-benzoate (75 microg rat(-1) day(-1) in 100 microl of olive oil) to adult rats, androgen receptor (AR) expression was analysed simultaneously in testis, epididymis, seminal vesicle, prostate and pituitary utilising three independent tools i.e. immunohistochemistry, Western blotting and RT-PCR. All the five organs showed higher AR transcriptional activity gradually increasing from 15 to 30 days of oestrogen treatment. However, the AR protein expression either through immunostaining or Western blotting demonstrated a significant decline in all the reproductive organs. In the pituitary, on the other hand, the decline coincided with a distinct breakdown of the AR protein into two bands with increasing duration of treatment. Serum and intra-testicular testosterone levels were found significantly lowered. Spermatogenesis was adversely affected with concurrent decrease in weights of testis and accessory sex organs. Decrease in testis weight was consistent with the reduction in the number of maturing germ cells per tubule. Despite the decrease in weight, accessory sex organs like epididymis, seminal vesicle and prostate were completely devoid of any apoptotic cells which were characterised only in testis and pituitary. Seminiferous epithelium demonstrated a marked increase in the number of germ cells undergoing apoptosis. However, the rate of cell apoptosis was much higher in the pituitary than in the testis at the end of 30 days treatment. It is therefore concluded that degradation of AR protein expression after oestrogen treatment is probably directly linked to an increase in cell apoptosis both in testis and pituitary.


Subject(s)
Contraceptive Agents/pharmacology , Estradiol/analogs & derivatives , Genitalia, Male/drug effects , Pituitary Gland/drug effects , Receptors, Androgen/metabolism , Animals , Blotting, Western , Estradiol/pharmacology , Genitalia, Male/metabolism , Immunohistochemistry , Male , Pituitary Gland/metabolism , Rats , Rats, Sprague-Dawley , Reverse Transcriptase Polymerase Chain Reaction
16.
Fish Physiol Biochem ; 36(3): 587-595, 2010 Sep.
Article in English | MEDLINE | ID: mdl-19452256

ABSTRACT

The relative efficacies of three natural estrogens viz., estrone (E(1)), estradiol-17beta (E(2)) and estriol (E(3)) to induce synthesis of vitellogenin (Vg) and choriogenin (Chg) were assessed in primary hepatocyte cultures of the Indian freshwater spotted snakehead, Channa punctata. Hepatocytes were isolated from the spotted snakehead liver by a non-enzymatic protocol. Optimum culture conditions were standardized for ensuring their viability and functioning. Isolated hepatocytes were cultured for 48 h for monolayer formation and then exposed to various concentrations (0.001-10 microM) of the three estrogens. Competitive homologous ELISAs, developed and validated for spotted snakehead Vg and Chg were employed to determine the amounts of these two proteins secreted into the culture medium after 48 h of incubation. The results reveal that although all the three estrogens were effective in inducing the production of Vg and Chg in a dose-dependent manner, there were differences in their relative potencies. Of three estrogens, E(1) was the least potent and could induce synthesis of Vg and Chg only at a minimum concentration of 0.5 microM; whereas significant levels of both the proteins were quantified in culture medium by exposing the hepatocytes to E(2) or E(3) even at a concentration of 0.001 microM. All three estrogens were effective in inducing synthesis of Vg and Chg in vivo also. These results suggest the possibility of employing the above in vitro experimental design to monitor the presence of estrogens/estrogen-like chemicals in natural waters, which could interfere with the estrogen receptor system of fish. This study further points to the possibility of using Chg, in addition to Vg, as a parameter for screening various chemicals for their estrogenic activity.


Subject(s)
Aquaculture/methods , Egg Proteins/biosynthesis , Estrogens/metabolism , Fish Proteins/biosynthesis , Perciformes/metabolism , Protein Precursors/biosynthesis , Vitellogenins/biosynthesis , Animals , Cells, Cultured , Dose-Response Relationship, Drug , Enzyme-Linked Immunosorbent Assay , Estradiol , Estriol , Estrogens/pharmacology , Estrone , Female , Hepatocytes , India
17.
Apoptosis ; 12(7): 1173-82, 2007 Jul.
Article in English | MEDLINE | ID: mdl-17333317

ABSTRACT

The clinical significance of exogenous hCG treatment is to stimulate steroidogenesis and spermatogenesis in the testis. However, the pathogenesis of detrimental effects on the testis arising out of chronic hCG treatment is yet to be clearly ascertained. In the present study we have shown that hCG treatment (100 IU/day) to rats for 30 days raises testicular oxidative stress leading to germ cell apoptosis and impairment of spermatogenesis. The treatment raises testicular H(2)O(2) levels along with increase in lipid peroxidation and concomitant decrease in the enzymatic antioxidant activities like superoxide dismutase, catalase and glutathione-s-transferase. The rise in the number of apoptotic germ cells was associated with up regulation of Fas protein expression and caspase-3 activity in the testis. However, serum testosterone which was elevated by 15 days of hCG treatment declined to pretreatment levels by 30 days. No significant alteration in serum gonadotropins was observed. The above findings indicate that the pathogenesis of deleterious effects following chronic hCG treatment is due to increase in testicular oxidative stress with high H(2)O(2) availability leading to apoptosis among germ cells.


Subject(s)
Apoptosis/drug effects , Chorionic Gonadotropin/pharmacology , Hydrogen Peroxide/metabolism , Spermatozoa/cytology , Spermatozoa/metabolism , Testis/metabolism , Animals , Caspase 3/metabolism , Chorionic Gonadotropin/administration & dosage , In Situ Nick-End Labeling , Male , Microscopy, Electron, Transmission , Oxidative Stress , Rats , Spermatogenesis/drug effects , Spermatozoa/enzymology , Spermatozoa/ultrastructure , Testis/cytology , Testis/ultrastructure
18.
Apoptosis ; 11(1): 39-46, 2006 Jan.
Article in English | MEDLINE | ID: mdl-16374549

ABSTRACT

H(2)O(2) is one of the active reactive oxygen species secreted by macrophages that are seen closely aligned with Leydig cells in the testicular interstitium. The present study was initiated to investigate the role of H(2)O(2) on Leydig cell function in vitro at physiological concentrations. Significant decrease in both testosterone production (p < 0.05) and 3 beta-hydroxysteroid dehydrogenase activity (p < 0.05) in adult Leydig cells were observed even with H(2)O(2) at low concentrations (30 - 50 microM). H(2)O(2) exposure increased oxidative stress in Leydig cells with the rise in lipid peroxidation and fall in the activities of the antioxidant enzymes; superoxide dismutase (SOD), catalase (CAT) & glutathione-s-transferase (GST). There was also a marginal increase (approximately 8%) in cell apoptosis accompanied by rise in FasL expression and caspase-3 activation. The above findings indicate that H(2)O(2) as a bio-molecule modulates Leydig cell function at or below physiological concentrations through a variety of actions like decrease in steroidogenic enzyme activity and increase in oxidative stress and apoptosis.


Subject(s)
Apoptosis/drug effects , Hydrogen Peroxide/pharmacology , Leydig Cells/cytology , Leydig Cells/drug effects , 3-Hydroxysteroid Dehydrogenases/metabolism , Animals , Apoptosis/physiology , Caspase 3/metabolism , Catalase/metabolism , Fas Ligand Protein/metabolism , Glutathione Transferase/metabolism , Hydrogen Peroxide/metabolism , In Vitro Techniques , Leydig Cells/metabolism , Lipid Peroxidation/drug effects , Male , Oxidative Stress/drug effects , Rats , Rats, Sprague-Dawley , Superoxide Dismutase/metabolism , Testosterone/biosynthesis
19.
J Virol ; 75(18): 8690-6, 2001 Sep.
Article in English | MEDLINE | ID: mdl-11507214

ABSTRACT

The contribution of immune reconstitution following antiretroviral treatment to the prevention or treatment of human immunodeficiency virus-related primary or reactivation tuberculosis remains unknown. Macaque models of simian immunodeficiency virus-Mycobacterium bovis BCG (SIV/BCG) coinfection were employed to determine the extent to which anti-Mycobacterium tuberculosis immunity can be restored by antiretroviral therapy. Both SIV-infected macaques with active BCG reinfection and naive animals with simultaneous SIV/BCG coinfection were evaluated. The suppression of SIV replication by antiretroviral treatment resulted in control of the active BCG infection and blocked development of the fatal SIV-related tuberculosis-like disease. The resolution of this disease coincided with the restoration of BCG purified protein derivative (PPD)-specific T-cell immune responses. In contrast, macaques similarly coinfected with SIV/BCG but not receiving antiretroviral therapy had depressed PPD-specific primary and memory T-cell immune responses and died from tuberculosis-like disease. These results provide in vivo evidence that the restoration of anti-mycobacterial immunity by antiretroviral agents can improve the clinical outcome of an AIDS virus-related tuberculosis-like disease.


Subject(s)
Adenine/analogs & derivatives , Antiviral Agents/therapeutic use , HIV Protease Inhibitors/therapeutic use , Indinavir/therapeutic use , Mycobacterium bovis/drug effects , Nelfinavir/therapeutic use , Organophosphonates , Simian Acquired Immunodeficiency Syndrome/drug therapy , Tuberculosis/physiopathology , Adenine/therapeutic use , Animals , Cells, Cultured , Macaca mulatta , Macaca nemestrina , Organophosphorus Compounds/therapeutic use , Simian Acquired Immunodeficiency Syndrome/immunology , Simian Acquired Immunodeficiency Syndrome/virology , Simian Immunodeficiency Virus/genetics , T-Lymphocytes/cytology , T-Lymphocytes/immunology , Tenofovir , Tuberculosis/immunology
20.
Indian J Biochem Biophys ; 38(4): 263-9, 2001 Aug.
Article in English | MEDLINE | ID: mdl-11811623

ABSTRACT

Plasma from estrogenized, [32P] NaH2PO4-injected murrel, Channa punctatus was collected in the presence of proteolytic inhibitors and subjected to different separation procedures singly or in combination, viz., gel filtration chromatography on Ultrogel AcA 34, ion-exchange chromatography on DEAE sephacel, or selective precipitation with dimethylformamide or with Mg2+: EDTA in order to isolate vitellogenin from other plasma proteins. The results show that chromatography on Ultrogel or DEAE sephacel yields intact vitellogenin whereas prior precipitation with DMF or with Mg2+: EDTA results in either co-precipitation of other plasma proteins or in the cleavage of phosvitin-like material from the native vitellogenin molecule.


Subject(s)
Fishes , Vitellogenins/isolation & purification , Animals , Chromatography, Gel , Chromatography, Ion Exchange , Fresh Water , Vitellogenins/chemistry
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