1
|
Okolie A, Nigro MR, Polk S, Stubbs K, Chelliah S, Ohia SE, Liang D, Mbye YFN. Development and application of LC-MS/MS method for the quantification of hydrogen sulfide in the eye. Anal Biochem 2024; 687:115448. [PMID: 38158106 DOI: 10.1016/j.ab.2023.115448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/11/2023] [Accepted: 12/21/2023] [Indexed: 01/03/2024]
Abstract
There are limited studies that report the physiological levels of H2S in the eye. The currently available UV/Vis methods lack the required sensitivity and precision. Hence, the purpose of this study was to develop and validate a sensitive and robust pre-column derivatization LC-MS/MS method to measure changes in H2S levels in tissues from isolated porcine eyes. H2S was derivatized and an LC-MS/MS method was developed to monitor the derivatized product, Sulfide-dibimane (Sdb) using a reverse phase Waters Acquity BEH C18 column (1.7 μm, 2.1 × 100 mm). H2S quantification was performed using multiple-ion reaction monitoring (MRM) in positive mode, with the transitions of m/z 415.0 → m/z 223.0 for Sdb and m/z 353.0 → m/z 285.0 for internal standard (griseofulvin). This method provided a suitable way to quantify H2S and was then successfully adapted to measure H2S levels in isolated porcine iris-ciliary body tissues previously treated in the presence or absence of varying concentrations of lipopolysaccharide (LPS, 5-100 ng/ml), a pro-inflammatory agent. Isolated iris-ciliary bodies (ICB) from porcine eyes were cut into quadrants of approximately 50 mg and homogenized using a 1:3 volume of homogenizing buffer. H2S in the supernatant was then derivatized with monobromobimane and quantified.
Collapse
Affiliation(s)
- Anthonia Okolie
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA
| | - Maria Rincon Nigro
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA; Karuna Therapeutics, Inc., Boston, 02110, USA
| | - Sharhazad Polk
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA
| | - Keyona Stubbs
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA
| | - Selvam Chelliah
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA
| | - Sunny E Ohia
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA
| | - Dong Liang
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA.
| | - Ya Fatou Njie Mbye
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Texas Southern University, Houston, TX, 77004, USA.
| |
Collapse
|
2
|
Wesemann U, Mahnke M, Polk S, Bühler A, Willmund G. Gender and occupational differences in post-terrorist mental health outcomes among emergency responders with and without crisis intervention. Eur J Public Health 2022. [PMCID: PMC9594380 DOI: 10.1093/eurpub/ckac129.338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Introduction After the Berlin terrorist attack at Breitscheidplatz, the gender-specific evaluation of emergency responders (ER) revealed higher perceived levels of paranoid ideation among females. The occupation-specific evaluation revealed higher hostility among police officers and a lower quality of life among firefighters. The aim of this study was to examine the outcome of crisis intervention (CI) provided for ER deployed to this terrorist attack. Methods In total, N = 55 ER were included (n = 37 with and n = 18 w/o CI). Stress, quality of life, post-traumatic stress disorder, and current psychological stress were assessed 4 months after the attack. Results ER with and w/o CI were compared. Participants with CI showed lower quality of life in psychological health (t(53)=2.01, p=.050) and higher depressive symptomatology (t(44) = 2.51, p=.016). Females with CI showed lower quality of life in social relationships (t(12)=2.46, p=.030), whereas males showed more posttraumatic stress symptoms (t(39)= .32, p=.026). Emergency responders from NGOs with CI had higher phobic anxiety (t(9.2)=2.72, p=.023). Emergency medical technicians with CI showed more somatic (t(7.5)=2.52, p=.037) and depressive (t(8)=2.30, p=.050) symptoms. Conclusions This study provides evidence for differences in the mental health burden for ER with and w/o CI, in general and for subgroups of gender and occupation. There is no conclusive explanation for why ER with CI score worse on certain measures. It is possible that CI had a harmful influence due to the reinforcement of negative emotions in some parts of measures like the Critical Incident Stress Debriefing (CISD). While it is known that ERs are vulnerable to develop mental problems, and appropriate and timely help is recommended, it is important to critical evaluate the methods used and to take also into account the identified gender and occupational differences. Further research is needed to better understand the interaction of risk factors.
Collapse
Affiliation(s)
- U Wesemann
- Department of Psychiatry, Psychotherapy, Bundeswehr Hospital , Berlin, Germany
| | - M Mahnke
- Department of Psychiatry, Psychotherapy, Bundeswehr Hospital , Berlin, Germany
- Fire Department Berlin , Berlin, Germany
| | - S Polk
- Planck Institute for Human Development Max , Berlin, Germany
| | - A Bühler
- Department of Psychiatry, Psychotherapy, Bundeswehr Hospital , Berlin, Germany
| | - G Willmund
- Department of Psychiatry, Psychotherapy, Bundeswehr Hospital , Berlin, Germany
| |
Collapse
|
3
|
Abstract
Background Terrorist attacks induce various responses in emergency responders. Addressing this range of responses in individual workers is of central interest. Aims To assess the gender- and occupation-specific effects of a terrorist attack, particularly in emergency responders. Methods This was a pilot study. Emergency responders present during the 2016 terrorist attack at Breitscheidplatz in Berlin were asked to participate. Measures for crisis management had been previously implemented. Stress (Patient Health Questionnaire [PHQ]), quality of life (The World Health Organization Quality of Life [WHOQOL-BREF]), post-traumatic stress disorder (PTSD Checklist for DSM-5 [PCL-5]) and current psychological symptoms (Brief Symptom Inventory [BSI]) were assessed. Results Thirty-seven subjects were included, 11 female and 26 male. The occupational groups included 16 firefighters, six police officers, five psychosocial health care personnel and nine members of aid organizations. Three months after the attack, female workers showed higher scores in stress and paranoid ideation, police officers showed higher scores in hostility and firefighters scored lower quality of life in environment and physical health. Conclusions The mental health burden identified in this study plays an important role for emergency responders after terrorist attacks. Differences between occupational groups may be attributable to differences in tasks that responders perform during acute incidents. The presence of these differences 3 months after the incident suggests that these are at least medium-term conditions. This study may inform the development of treatments and policies and it thus recommended to develop a multi-level assessment and treatment programme that is gender- and occupation-specific.
Collapse
Affiliation(s)
- U Wesemann
- Department of Psychiatry, Psychotherapy and Psychotraumatology, German Armed Forces Hospital, Berlin, Germany
| | - P Zimmermann
- Department of Psychiatry, Psychotherapy and Psychotraumatology, German Armed Forces Hospital, Berlin, Germany
| | - M Mahnke
- Department of Psychiatry, Psychotherapy and Psychotraumatology, German Armed Forces Hospital, Berlin, Germany
- Fire Department of Berlin, Volunteer Fire Department of Wedding, Berlin, Germany
| | - O Butler
- Max Planck Institute for Human Development, Berlin, Germany
| | - S Polk
- Max Planck Institute for Human Development, Berlin, Germany
| | - G Willmund
- Department of Psychiatry, Psychotherapy and Psychotraumatology, German Armed Forces Hospital, Berlin, Germany
| |
Collapse
|
4
|
Jennings JM, Polk S, Fichtenberg C, Chung S, Ellen JM. O11.4 Place and core transmitters – implications for the targeted control of sti transmission in urban areas. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
5
|
Polk S, Ellen JM, Fichtenberg C, Huettner S, Reilly M, Parekh J, Jennings JM. P3.041 Identifying and Characterizing Places For the Targeted Control of HIV in Urban Areas. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.0501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
6
|
Polk S, Muñoz A, Sacktor NC, Jenkins FJ, Cohen B, Miller EN, Jacobson LP. A case-control study of HIV-1-related dementia and co-infection with HHV-8. Neurology 2002; 59:950-3. [PMID: 12297590 DOI: 10.1212/wnl.59.6.950] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This nested case-control study assessed the putative protective effect of human herpesvirus-8 (HHV-8) against HIV-1-related dementia (dementia). The HHV-8 seropositivity of 210 male age- and HIV disease stage-matched cases and controls was compared. The overall HHV-8 seropositivity of 66% was similar among demented HIV-infected cases and nondemented HIV-infected controls.
Collapse
Affiliation(s)
- S Polk
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | | | | | | | | | | | | |
Collapse
|
7
|
Barton MB, Moore S, Polk S, Shtatland E, Elmore JG, Fletcher SW. Increased patient concern after false-positive mammograms: clinician documentation and subsequent ambulatory visits. J Gen Intern Med 2001; 16:150-6. [PMID: 11318909 PMCID: PMC1495181 DOI: 10.1111/j.1525-1497.2001.00329.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To measure how often a breast-related concern was documented in medical records after screening mammography according to the mammogram result (normal, or true-negative vs false-positive) and to measure changes in health care utilization in the year after the mammogram. DESIGN Cohort study. SETTING Large health maintenance organization in New England. PATIENTS Group of 496 women with false-positive screening mammograms and a comparison group of 496 women with normal screening mammograms, matched for location and year of mammogram. MEASUREMENTS AND MAIN RESULTS 1) Documentation in clinicians' notes of patient concern about the breast and 2) ambulatory health care utilization, both breast-related and non-breast-related, in the year after the mammogram. Fifty (10%) of 496 women with false-positive mammograms had documentation of breast-related concern during the 12 months after the mammogram, compared to 1 (0.2%) woman with a normal mammogram (P =.001). Documented concern increased with the intensity of recommended follow-up (P =.009). Subsequent ambulatory visits, not related to the screening mammogram, increased in the year after the mammogram among women with false-positive mammograms, both in terms of breast-related visits (incidence ratio, 3.07; 95% confidence interval [CI], 1.69 to 5.93) and non-breast-related visits (incidence ratio, 1.14; 95% CI, 1.03 to 1.25). CONCLUSIONS Clinicians document concern about breast cancer in 10% of women who have false-positive mammograms, and subsequent use of health care services are increased among women with false-positive mammogram results.
Collapse
Affiliation(s)
- M B Barton
- Harvard Pilgrim Health Care and Harvard Medical School, Boston, Mass, USA.
| | | | | | | | | | | |
Collapse
|
8
|
Abstract
BACKGROUND The cumulative risk of a false positive result from a breast-cancer screening test is unknown. METHODS We performed a 10-year retrospective cohort study of breast-cancer screening and diagnostic evaluations among 2400 women who were 40 to 69 years old at study entry. Mammograms or clinical breast examinations that were interpreted as indeterminate, aroused a suspicion of cancer, or prompted recommendations for additional workup in women in whom breast cancer was not diagnosed within the next year were considered to be false positive tests. RESULTS A total of 9762 screening mammograms and 10,905 screening clinical breast examinations were performed, for a median of 4 mammograms and 5 clinical breast examinations per woman over the 10-year period. Of the women who were screened, 23.8 percent had at least one false positive mammogram, 13.4 percent had at least one false positive breast examination, and 31.7 percent had at least one false positive result for either test. The estimated cumulative risk of a false positive result was 49.1 percent (95 percent confidence interval, 40.3 to 64.1 percent) after 10 mammograms and 22.3 percent (95 percent confidence interval, 19.2 to 27.5 percent) after 10 clinical breast examinations. The false positive tests led to 870 outpatient appointments, 539 diagnostic mammograms, 186 ultrasound examinations, 188 biopsies, and 1 hospitalization. We estimate that among women who do not have breast cancer, 18.6 percent (95 percent confidence interval, 9.8 to 41.2 percent) will undergo a biopsy after 10 mammograms, and 6.2 percent (95 percent confidence interval, 3.7 to 11.2 percent) after 10 clinical breast examinations. For every 100 dollars spent for screening, an additional 33 dollars was spent to evaluate the false positive results. CONCLUSIONS Over 10 years, one third of women screened had an abnormal test result that required additional evaluation, even though no breast cancer was present. Techniques are needed to decrease false positive results while maintaining high sensitivity. Physicians should educate women about the risk of a false positive result from a screening test for breast cancer.
Collapse
Affiliation(s)
- J G Elmore
- Department of Medicine, University of Washington School of Medicine, Seattle 98195-6429, USA
| | | | | | | | | | | |
Collapse
|
9
|
Jacobson LP, Kirby AJ, Polk S, Phair JP, Besley DR, Saah AJ, Kingsley LA, Schrager LK. Changes in survival after acquired immunodeficiency syndrome (AIDS): 1984-1991. Am J Epidemiol 1993; 138:952-64. [PMID: 7903022 DOI: 10.1093/oxfordjournals.aje.a116815] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
In a prospective cohort of 2,647 human immunodeficiency virus type 1 (HIV-1) seropositive homosexual men enrolled in Baltimore, Chicago, Los Angeles, and Pittsburgh, 891 developed clinical acquired immunodeficiency syndrome (AIDS) between June 1984 and January 1992. Cox proportional hazards models were used to examine temporal trends in survival after AIDS for specific diagnoses, controlling for level of immunosuppression at diagnosis, age, race, and geographic location. Median survival time following AIDS onset increased from 11.6 months in 1984-1985 to 19.5 months in 1988-1989; for those diagnosed in 1990-1991, the median survival time dropped to 17.2 months. Trends in improved survival were diagnosis-specific. Survival after Pneumocystis carinii pneumonia consistently improved from 1984 to 1991 (p < 0.001). Compared with men diagnosed in 1984-1985, those diagnosed with P. carinii pneumonia in 1990-1991 had one-tenth the hazard of dying. For men with > or = 100 helper T-lymphocytes (CD4+ cells) when diagnosed with Kaposi's sarcoma, the relative hazards (95% confidence intervals) of dying after Kaposi's sarcoma were 0.8 (0.42-1.60) in 1986-1987, 0.7 (0.34-1.58) in 1988-1989, and 0.6 (0.19-1.61) in 1990-1991 compared with those diagnosed before 1986. Men with < 100 CD4+ cells when diagnosed with Kaposi's sarcoma did not demonstrate a consistent change in their subsequent survival. After a nonsignificant (p > 0.05) initial improvement in prognosis, there has not been a significant improvement in survival for men who presented with other opportunistic infections. Observed increases in overall survival probably relate to improved treatment of patients who develop P. carinii pneumonia. Limited improvement in survival following other AIDS diagnoses indicates the need for developing effective treatment against these diseases.
Collapse
Affiliation(s)
- L P Jacobson
- Johns Hopkins University, School of Public Health, Department of Epidemiology, Baltimore, MD 21205
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Roizen MF, Schreider B, Austin W, Carter C, Polk S. Pulse oximetry, capnography, and blood gas measurements: reducing cost and improving the quality of care with technology. J Clin Monit Comput 1993; 9:237-40. [PMID: 8301330 DOI: 10.1007/bf02886693] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Pulse oximetry appears to improve quality of care by the early detection of hypoxia noninvasively. We tested the hypothesis that the widespread use of pulse oximetry over a 5-year period in the operating rooms at our institution had resulted in a reduction in blood gas measurements and in departmental operating costs. The total number of blood gas determinations per hour of anesthetic time at our institution decreased by 44%, from 7.64 to 4.26 measurements per 100 operating room hours. The number of capnography units in the operating rooms increased from 8 to 14, the number of pulse oximeters increased from 0 to 22, and oximeter use increased from 0 to 100% for all anesthetics. The total cost to provide oximetry, capnography, and blood gas measurements in 1989-1990 was less than the cost to provide blood gas measurements alone in 1985-1986. The introduction of these technologies was accomplished without an increase in cost: $76,880 in 1985-1986 versus $71,025 in 1989-1990.
Collapse
Affiliation(s)
- M F Roizen
- Department of Anesthesia and Critical Care, University of Chicago, IL 60637
| | | | | | | | | |
Collapse
|
11
|
Abstract
In this study we investigated three possible mechanisms for the decreased airway responsiveness (AR) found in young lambs. To evaluate aerosol delivery, 6 adult sheep (9 mo-3 yr old) and 12 lambs (4-8 wk old) were challenged with aerosol (aH) and intravenous histamine (ivH). Awake animals were intubated and studied in a plethysmograph, which measured dynamic compliance (Cdyn), resistance of the lung, and functional residual capacity. AR to histamine was measured by administration of increasing concentrations of histamine until a significant change in lung mechanics occurred or until the maximum dose of histamine was given. In all six adult sheep, the response to both aH and iVH was a decrease in Cdyn. In two lambs Cdyn was decreased with both aH and ivH, in five lambs with neither, in three lambs with aH only, and in two lambs with ivH only. To examine the role of beta-adrenergic activity in determining AR, six adult sheep and six lambs received ivH and on a separate day ivH with propranolol pretreatment (p + ivH). The median effective dose of histamine that caused a reduction in Cdyn to 65% of normal saline control (ED65Cdyn) for the adult sheep given ivH was 3.60 (range 0.23-4.85) and 0.70 (range 0.49-8.0) micrograms.kg-1.min-1 for p + ivH (P = NS). The median ED65Cdyn for the six lambs was 8.0 micrograms.kg-1.min-1 for both ivH alone and p + ivH. To evaluate the role of airway smooth muscle (SM), AR to aH was quantitated in six adult sheep and six lambs, and then an open-lung biopsy was performed.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- A Stecenko
- Department of Pediatrics, University of Florida College of Medicine, Gainesville 32610
| | | | | |
Collapse
|
12
|
Polk S. Helping our children. Child Today 1987; 16:19-20. [PMID: 3677852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|